엑셀 파싱 이원화(표준/인벤터) 및 자재 분류기(Plate, H-Beam, Swagelok) 개선

backend/app/services/excel_parser.py

@@ -0,0 +1,300 @@
+
+import pandas as pd
+import re
+from typing import List, Dict, Optional
+import uuid
+from datetime import datetime
+from pathlib import Path
+
+# 허용된 확장자
+ALLOWED_EXTENSIONS = {".xlsx", ".xls", ".csv"}
+
+class BOMParser:
+    """BOM 파일 파싱을 담당하는 클래스"""
+    
+    @staticmethod
+    def validate_extension(filename: str) -> bool:
+        return Path(filename).suffix.lower() in ALLOWED_EXTENSIONS
+
+    @staticmethod
+    def generate_unique_filename(original_filename: str) -> str:
+        timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
+        unique_id = str(uuid.uuid4())[:8]
+        stem = Path(original_filename).stem
+        suffix = Path(original_filename).suffix
+        return f"{stem}_{timestamp}_{unique_id}{suffix}"
+
+    @staticmethod
+    def detect_format(df: pd.DataFrame) -> str:
+        """
+        엑셀 헤더를 분석하여 양식을 감지합니다.
+        
+        Returns:
+            'INVENTOR': 인벤터 추출 양식 (NO., NAME, Q'ty, LENGTH & THICKNESS...)
+            'STANDARD': 기존 표준/퍼지 매핑 엑셀 (DWG_NAME, LINE_NUM, MAIN_NOM...)
+        """
+        columns = [str(c).strip().upper() for c in df.columns]
+        
+        # 인벤터 양식 특징 (오타 포함)
+        INVENTOR_KEYWORDS = ['LENGTH & THICKNESS', 'DESCIPTION', "Q'TY"]
+        
+        for keyword in INVENTOR_KEYWORDS:
+            if any(keyword in col for col in columns):
+                return 'INVENTOR'
+        
+        # 표준 양식 특징
+        STANDARD_KEYWORDS = ['MAIN_NOM', 'DWG_NAME', 'LINE_NUM']
+        for keyword in STANDARD_KEYWORDS:
+            if any(keyword in col for col in columns):
+                return 'STANDARD'
+                
+        return 'STANDARD'  # 기본값
+
+    @classmethod
+    def parse_file(cls, file_path: str) -> List[Dict]:
+        """파일 경로를 받아 적절한 파서를 통해 데이터를 추출합니다."""
+        file_extension = Path(file_path).suffix.lower()
+        
+        try:
+            if file_extension == ".csv":
+                df = pd.read_csv(file_path, encoding='utf-8')
+            elif file_extension in [".xlsx", ".xls"]:
+                # xlrd 엔진 명시 (xls 지원)
+                if file_extension == ".xls":
+                    df = pd.read_excel(file_path, sheet_name=0, engine='xlrd')
+                else:
+                    df = pd.read_excel(file_path, sheet_name=0, engine='openpyxl')
+            else:
+                raise ValueError("지원하지 않는 파일 형식")
+            
+            # 데이터프레임 전처리 (빈 행 제거 등)
+            df = df.dropna(how='all')
+            
+            # 양식 감지
+            format_type = cls.detect_format(df)
+            print(f"📋 감지된 BOM 양식: {format_type}")
+            
+            if format_type == 'INVENTOR':
+                return cls._parse_inventor_bom(df)
+            else:
+                return cls._parse_standard_bom(df)
+                
+        except Exception as e:
+            raise ValueError(f"파일 파싱 실패: {str(e)}")
+
+    @staticmethod
+    def _parse_standard_bom(df: pd.DataFrame) -> List[Dict]:
+        """기존의 퍼지 매핑 방식 파서 (표준 양식)"""
+        # 컬럼명 전처리
+        df.columns = df.columns.str.strip().str.upper()
+        
+        # 대소문자 구분 없는 매핑을 위해 컬럼명 대문자화 사용
+        column_mapping = {
+            'description': ['DESCRIPTION', 'ITEM', 'MATERIAL', '품명', '자재명', 'SPECIFICATION'],
+            'quantity': ['QTY', 'QUANTITY', 'EA', '수량', 'AMOUNT'],
+            'main_size': ['MAIN_NOM', 'NOMINAL_DIAMETER', 'ND', '주배관', 'SIZE'],
+            'red_size': ['RED_NOM', 'REDUCED_DIAMETER', '축소배관'],
+            'length': ['LENGTH', 'LEN', '길이'],
+            'weight': ['WEIGHT', 'WT', '중량'],
+            'dwg_name': ['DWG_NAME', 'DRAWING', '도면명', '도면번호'],
+            'line_num': ['LINE_NUM', 'LINE_NUMBER', '라인번호']
+        }
+        
+        mapped_columns = {}
+        for standard_col, possible_names in column_mapping.items():
+            for possible_name in possible_names:
+                # 대문자로 비교
+                possible_upper = possible_name.upper()
+                if possible_upper in df.columns:
+                    mapped_columns[standard_col] = possible_upper
+                    break
+        
+        print(f"📋 [Standard] 컬럼 매핑 결과: {mapped_columns}")
+        
+        materials = []
+        for index, row in df.iterrows():
+            description = str(row.get(mapped_columns.get('description', ''), ''))
+            
+            # 제외 항목 처리
+            description_upper = description.upper()
+            if ('WELD GAP' in description_upper or 'WELDING GAP' in description_upper or 
+                '웰드갭' in description_upper or '용접갭' in description_upper):
+                continue
+            
+            # 수량 처리
+            quantity_raw = row.get(mapped_columns.get('quantity', ''), 0)
+            try:
+                quantity = float(quantity_raw) if pd.notna(quantity_raw) else 0
+            except:
+                quantity = 0
+            
+            # 재질 등급 추출 (ASTM)
+            material_grade = ""
+            if "ASTM" in description_upper:
+                astm_match = re.search(r'ASTM\s+(A\d{3,4}[A-Z]*(?:\s+(?:GR\s+)?[A-Z0-9]+)?)', description_upper)
+                if astm_match:
+                    material_grade = astm_match.group(0).strip()
+            
+            # 사이즈 처리
+            main_size = str(row.get(mapped_columns.get('main_size', ''), ''))
+            red_size = str(row.get(mapped_columns.get('red_size', ''), ''))
+            
+            main_nom = main_size if main_size != 'nan' and main_size != '' else None
+            red_nom = red_size if red_size != 'nan' and red_size != '' else None
+            
+            if main_size != 'nan' and red_size != 'nan' and red_size != '':
+                size_spec = f"{main_size} x {red_size}"
+            elif main_size != 'nan' and main_size != '':
+                size_spec = main_size
+            else:
+                size_spec = ""
+            
+            # 길이 처리
+            length_raw = row.get(mapped_columns.get('length', ''), '')
+            length_value = None
+            if pd.notna(length_raw) and str(length_raw).strip() != '':
+                try:
+                    length_value = float(str(length_raw).strip())
+                except:
+                    length_value = None
+            
+            # 도면/라인 번호
+            dwg_name = row.get(mapped_columns.get('dwg_name', ''), '')
+            dwg_name = str(dwg_name).strip() if pd.notna(dwg_name) and str(dwg_name).strip() not in ['', 'nan', 'None'] else None
+            
+            line_num = row.get(mapped_columns.get('line_num', ''), '')
+            line_num = str(line_num).strip() if pd.notna(line_num) and str(line_num).strip() not in ['', 'nan', 'None'] else None
+            
+            if description and description not in ['nan', 'None', '']:
+                materials.append({
+                    'original_description': description,
+                    'quantity': quantity,
+                    'unit': "EA",
+                    'size_spec': size_spec,
+                    'main_nom': main_nom,
+                    'red_nom': red_nom,
+                    'material_grade': material_grade,
+                    'length': length_value,
+                    'dwg_name': dwg_name,
+                    'line_num': line_num,
+                    'line_number': index + 1,
+                    'row_number': index + 1
+                })
+        
+        return materials
+
+    @staticmethod
+    def _parse_inventor_bom(df: pd.DataFrame) -> List[Dict]:
+        """
+        [신규] 인벤터 추출 양식 파서
+        헤더: NO., NAME, Q'ty, LENGTH & THICKNESS, WEIGHT, DESCIPTION, REMARK
+        특징: Size 컬럼 부재, NAME에 주요 정보 포함
+        """
+        print("⚠️ [Inventor] 인벤터 양식 파서를 사용합니다.")
+        
+        # 컬럼명 전처리 (좌우 공백 제거 및 대문자화)
+        df.columns = df.columns.str.strip().str.upper()
+        
+        # 인벤터 전용 매핑
+        col_name = 'NAME'
+        col_qty = "Q'TY"
+        col_desc = 'DESCIPTION'  # 오타 그대로 반영
+        col_remark = 'REMARK'
+        col_length = 'LENGTH & THICKNESS' # 길이 정보가 여기 있을 수 있음
+        
+        materials = []
+        for index, row in df.iterrows():
+            # 1. 품명 (NAME 컬럼 우선 사용)
+            name_val = str(row.get(col_name, '')).strip()
+            desc_val = str(row.get(col_desc, '')).strip()
+            
+            # NAME과 DESCIPTION 병합 (필요시)
+            # 보통 인벤터에서 NAME이 'ADAPTER OD 1/4" x NPT(F) 1/2"' 같이 상세 스펙
+            # DESCIPTION은 'SS-400-7-8' 같은 자재 코드일 수 있음
+            # 일단 NAME을 메인 description으로 사용하고, DESCIPTION을 괄호에 추가
+            if desc_val and desc_val not in ['nan', 'None', '']:
+                full_description = f"{name_val} ({desc_val})"
+            else:
+                full_description = name_val
+            
+            if not full_description or full_description in ['nan', 'None', '']:
+                continue
+
+            # 2. 수량
+            qty_raw = row.get(col_qty, 0)
+            try:
+                quantity = float(qty_raw) if pd.notna(qty_raw) else 0
+            except:
+                quantity = 0
+
+            # 3. 사이즈 추출 (NAME 컬럼 분석)
+            # 패턴: 1/2", 1/4", 100A, 50A, 10x20 등
+            size_spec = ""
+            main_nom = None
+            red_nom = None
+            
+            # 인치/MM 사이즈 추출 시도
+            # 예: "ADAPTER OD 1/4" x NPT(F) 1/2"" -> 1/4" x 1/2"
+            # 예: "ELBOW 90D 100A" -> 100A
+            
+            # 인치 패턴 (1/2", 3/4" 등)
+            inch_sizes = re.findall(r'(\d+(?:/\d+)?)"', name_val)
+            # A단위 패턴 (100A, 50A 등)
+            a_sizes = re.findall(r'(\d+)A', name_val)
+            
+            if inch_sizes:
+                if len(inch_sizes) >= 2:
+                    main_nom = f'{inch_sizes[0]}"'
+                    red_nom = f'{inch_sizes[1]}"'
+                    size_spec = f'{main_nom} x {red_nom}'
+                else:
+                    main_nom = f'{inch_sizes[0]}"'
+                    size_spec = main_nom
+            elif a_sizes:
+                if len(a_sizes) >= 2:
+                    main_nom = f'{a_sizes[0]}A'
+                    red_nom = f'{a_sizes[1]}A'
+                    size_spec = f'{main_nom} x {red_nom}'
+                else:
+                    main_nom = f'{a_sizes[0]}A'
+                    size_spec = main_nom
+            
+            # 4. 재질 정보
+            material_grade = ""
+            # NAME이나 DESCIPTION에서 재질 키워드 찾기 (SS, SUS, A105 등)
+            combined_text = (full_description + " " + desc_val).upper()
+            if "SUS" in combined_text or "SS" in combined_text:
+                if "304" in combined_text: material_grade = "SUS304"
+                elif "316" in combined_text: material_grade = "SUS316"
+                else: material_grade = "SUS"
+            elif "A105" in combined_text:
+                material_grade = "A105"
+            
+            # 5. 길이 정보
+            length_value = None
+            length_raw = row.get(col_length, '')
+            # 값이 있고 숫자로 변환 가능하면 사용
+            if pd.notna(length_raw) and str(length_raw).strip():
+                try:
+                    # '100 mm' 등의 형식 처리 필요할 수 있음
+                    length_str = str(length_raw).lower().replace('mm', '').strip()
+                    length_value = float(length_str)
+                except:
+                    pass
+
+            materials.append({
+                'original_description': full_description,
+                'quantity': quantity,
+                'unit': "EA",
+                'size_spec': size_spec,
+                'main_nom': main_nom,
+                'red_nom': red_nom,
+                'material_grade': material_grade,
+                'length': length_value,
+                'dwg_name': None, # 인벤터 파일엔 도면명 컬럼이 없음
+                'line_num': None,
+                'line_number': index + 1,
+                'row_number': index + 1
+            })
+            
+        return materials

backend/app/services/fitting_classifier.py

@@ -248,78 +248,23 @@ def classify_fitting(dat_file: str, description: str, main_nom: str,
     )
     
     # 6. 최종 결과 조합
+    # --- 계장용(Instrument/Swagelok) 피팅 감지 로직 추가 ---
+    instrument_keywords = ["SWAGELOK", "DK-LOK", "TUBE FITTING", "UNION", "FERRULE", "MALE CONNECTOR", "FEMALE CONNECTOR"]
+    is_instrument = any(kw in desc_upper for kw in instrument_keywords)
+    
+    if is_instrument:
+        fitting_type["category"] = "INSTRUMENT_FITTING"
+        if "SWAGELOK" in desc_upper: fitting_type["brand"] = "SWAGELOK"
+        
+        # Tube OD 추출 (예: 1/4", 6MM, 12MM)
+        tube_match = re.search(r'(\d+(?:/\d+)?)\s*(?:\"|INCH|MM)\s*(?:OD|TUBE)', desc_upper)
+        if tube_match:
+            fitting_type["tube_od"] = tube_match.group(0)
+
     return {
         "category": "FITTING",
-        
-        # 재질 정보 (공통 모듈)
-        "material": {
-            "standard": material_result.get('standard', 'UNKNOWN'),
-            "grade": material_result.get('grade', 'UNKNOWN'),
-            "material_type": material_result.get('material_type', 'UNKNOWN'),
-            "confidence": material_result.get('confidence', 0.0)
-        },
-        
-        # 피팅 특화 정보
-        "fitting_type": {
-            "type": fitting_type_result.get('type', 'UNKNOWN'),
-            "subtype": fitting_type_result.get('subtype', 'UNKNOWN'),
-            "confidence": fitting_type_result.get('confidence', 0.0),
-            "evidence": fitting_type_result.get('evidence', [])
-        },
-        
-        "connection_method": {
-            "method": connection_result.get('method', 'UNKNOWN'),
-            "confidence": connection_result.get('confidence', 0.0),
-            "matched_code": connection_result.get('matched_code', ''),
-            "size_range": connection_result.get('size_range', ''),
-            "pressure_range": connection_result.get('pressure_range', '')
-        },
-        
-        "pressure_rating": {
-            "rating": pressure_result.get('rating', 'UNKNOWN'),
-            "confidence": pressure_result.get('confidence', 0.0),
-            "max_pressure": pressure_result.get('max_pressure', ''),
-            "common_use": pressure_result.get('common_use', '')
-        },
-        
-        "manufacturing": {
-            "method": manufacturing_result.get('method', 'UNKNOWN'),
-            "confidence": manufacturing_result.get('confidence', 0.0),
-            "evidence": manufacturing_result.get('evidence', []),
-            "characteristics": manufacturing_result.get('characteristics', '')
-        },
-        
-        "size_info": {
-            "main_size": main_nom,
-            "reduced_size": red_nom,
-            "size_description": format_fitting_size(main_nom, red_nom),
-            "requires_two_sizes": fitting_type_result.get('requires_two_sizes', False)
-        },
-        
-        "schedule_info": {
-            "schedule": schedule_result.get('schedule', 'UNKNOWN'),
-            "schedule_number": schedule_result.get('schedule_number', ''),
-            "wall_thickness": schedule_result.get('wall_thickness', ''),
-            "pressure_class": schedule_result.get('pressure_class', ''),
-            "confidence": schedule_result.get('confidence', 0.0)
-        },
-        
-        # 전체 신뢰도
-        "overall_confidence": calculate_fitting_confidence({
-            "material": material_result.get('confidence', 0),
-            "fitting_type": fitting_type_result.get('confidence', 0),
-            "connection": connection_result.get('confidence', 0),
-            "pressure": pressure_result.get('confidence', 0)
-        }),
-        
-        # 통합분류기 호환성을 위한 confidence 필드
-        "confidence": calculate_fitting_confidence({
-            "material": material_result.get('confidence', 0),
-            "fitting_type": fitting_type_result.get('confidence', 0),
-            "connection": connection_result.get('confidence', 0),
-            "pressure": pressure_result.get('confidence', 0)
-        })
-    }
+        "fitting_type": fitting_type,
+
 
 def analyze_size_pattern_for_fitting_type(description: str, main_nom: str, red_nom: str = None) -> Dict:
     """

backend/app/services/integrated_classifier.py

@@ -13,10 +13,18 @@ LEVEL1_TYPE_KEYWORDS = {
     "VALVE": ["VALVE", "GATE", "BALL", "GLOBE", "CHECK", "BUTTERFLY", "NEEDLE", "RELIEF", "SIGHT GLASS", "STRAINER", "밸브", "게이트", "볼", "글로브", "체크", "버터플라이", "니들", "릴리프", "사이트글라스", "스트레이너"],
     "FLANGE": ["FLG", "FLANGE", "플랜지", "프랜지", "ORIFICE", "SPECTACLE", "PADDLE", "SPACER", "BLIND", "REDUCING FLANGE", "RED FLANGE"],
     "PIPE": ["PIPE", "TUBE", "파이프", "배관", "SMLS", "SEAMLESS"],
-    "FITTING": ["SOCK-O-LET", "WELD-O-LET", "ELL-O-LET", "THREAD-O-LET", "ELB-O-LET", "NIP-O-LET", "COUP-O-LET", "SOCKOLET", "WELDOLET", "ELLOLET", "THREADOLET", "ELBOLET", "NIPOLET", "COUPOLET", "OLET", "ELBOW", "ELL", "TEE", "REDUCER", "CAP", "COUPLING", "NIPPLE", "SWAGE", "PLUG", "엘보", "티", "리듀서", "캡", "니플", "커플링", "플러그", "CONC", "ECC"],
+    "FITTING": [
+        "SOCK-O-LET", "WELD-O-LET", "ELL-O-LET", "THREAD-O-LET", "ELB-O-LET", "NIP-O-LET", "COUP-O-LET", 
+        "SOCKOLET", "WELDOLET", "ELLOLET", "THREADOLET", "ELBOLET", "NIPOLET", "COUPOLET", "OLET", 
+        "ELBOW", "ELL", "TEE", "REDUCER", "CAP", "COUPLING", "NIPPLE", "SWAGE", "PLUG", 
+        "엘보", "티", "리듀서", "캡", "니플", "커플링", "플러그", "CONC", "ECC",
+        "SWAGELOK", "UNION", "CONNECTOR", "FERRULE", "NUT & FERRULE", "MALE CONNECTOR", "FEMALE CONNECTOR"
+    ],
     "GASKET": ["GASKET", "GASK", "가스켓", "SWG", "SPIRAL"],
     "INSTRUMENT": ["GAUGE", "TRANSMITTER", "SENSOR", "THERMOMETER", "계기", "게이지", "트랜스미터", "센서"],
-    "SUPPORT": ["URETHANE BLOCK", "URETHANE", "BLOCK SHOE", "CLAMP", "SUPPORT", "HANGER", "SPRING", "우레탄", "블록", "클램프", "서포트", "행거", "스프링"]
+    "SUPPORT": ["URETHANE BLOCK", "URETHANE", "BLOCK SHOE", "CLAMP", "SUPPORT", "HANGER", "SPRING", "우레탄", "블록", "클램프", "서포트", "행거", "스프링"],
+    "PLATE": ["PLATE", "PL", "CHECKER PLATE", "판재", "철판"],
+    "STRUCTURAL": ["H-BEAM", "BEAM", "ANGLE", "CHANNEL", "H-SECTION", "I-BEAM", "형강", "앵글", "채널"]
 }
 
 # Level 2: 서브타입 키워드 (구체화)
@@ -171,6 +179,37 @@ def classify_material_integrated(description: str, main_nom: str = "",
             # 긴 키워드부터 확인 (FLANGE BOLT가 FLANGE보다 먼저 매칭되도록)
             sorted_keywords = sorted(keywords, key=len, reverse=True)
             for keyword in sorted_keywords:
+                # [강화된 로직] 짧은 키워드나 중의적 키워드에 대한 엄격한 검사
+                is_strict_match = True
+                
+                # 1. "PL" 키워드 검사 (PLATE)
+                if keyword == "PL":
+                    # 단독 단어이거나 숫자 뒤에 붙는 경우만 허용 (예: 10PL, 10 PL)
+                    # COUPLING, NIPPLE, PLUG 등에 포함된 PL은 제외
+                    pl_pattern = r'(\b|\d)PL\b'
+                    if not re.search(pl_pattern, desc_upper):
+                        is_strict_match = False
+                
+                # 2. "ANGLE" 키워드 검사 (STRUCTURAL)
+                elif keyword == "ANGLE" or keyword == "앵글":
+                    # VALVE와 함께 쓰이면 제외 (ANGLE VALVE)
+                    if "VALVE" in desc_upper or "밸브" in desc_upper:
+                        is_strict_match = False
+                        
+                # 3. "UNION" 키워드 검사 (FITTING)
+                elif keyword == "UNION":
+                    # 계장용인지 파이프용인지 구분은 fitting_classifier에서 하되,
+                    # 여기서는 일단 FITTING으로 잡히도록 둠.
+                    pass
+                
+                # 4. "BEAM" 키워드 검사 (STRUCTURAL)
+                elif keyword == "BEAM":
+                     # "BEAM CLAMP" 같은 경우 SUPPORT로 가야 함 (SUPPORT가 우선순위 높으므로 괜찮음)
+                     pass
+
+                if not is_strict_match:
+                    continue
+
                 # 전체 문자열에서 찾기
                 if keyword in desc_upper:
                     detected_types.append((material_type, keyword))

backend/app/services/material_service.py

@@ -0,0 +1,592 @@
+
+from sqlalchemy.orm import Session
+from sqlalchemy import text
+from typing import List, Dict, Optional
+import json
+from datetime import datetime
+
+from app.services.integrated_classifier import classify_material_integrated, should_exclude_material
+from app.services.bolt_classifier import classify_bolt
+from app.services.flange_classifier import classify_flange
+from app.services.fitting_classifier import classify_fitting
+from app.services.gasket_classifier import classify_gasket
+from app.services.instrument_classifier import classify_instrument
+from app.services.valve_classifier import classify_valve
+from app.services.support_classifier import classify_support
+from app.services.plate_classifier import classify_plate
+from app.services.structural_classifier import classify_structural
+from app.services.pipe_classifier import classify_pipe_for_purchase, extract_end_preparation_info
+from app.services.material_grade_extractor import extract_full_material_grade
+
+class MaterialService:
+    """자재 처리 및 저장을 담당하는 서비스"""
+
+    @staticmethod
+    def process_and_save_materials(
+        db: Session,
+        file_id: int,
+        materials_data: List[Dict],
+        revision_comparison: Optional[Dict] = None,
+        parent_file_id: Optional[int] = None,
+        purchased_materials_map: Optional[Dict] = None
+    ) -> int:
+        """
+        자재 목록을 분류하고 DB에 저장합니다.
+        
+        Args:
+            db: DB 세션
+            file_id: 파일 ID
+            materials_data: 파싱된 자재 데이터 목록
+            revision_comparison: 리비전 비교 결과
+            parent_file_id: 이전 리비전 파일 ID
+            purchased_materials_map: 구매 확정된 자재 매핑 정보
+            
+        Returns:
+            저장된 자재 수
+        """
+        materials_inserted = 0
+        
+        # 변경/신규 자재 키 집합 (리비전 추적용)
+        changed_materials_keys = set()
+        new_materials_keys = set()
+        
+        # 리비전 업로드인 경우 변경사항 분석
+        if parent_file_id is not None:
+            MaterialService._analyze_changes(
+                db, parent_file_id, materials_data, 
+                changed_materials_keys, new_materials_keys
+            )
+        
+        # 변경 없는 자재 (확정된 자재) 먼저 처리
+        if revision_comparison and revision_comparison.get("has_previous_confirmation", False):
+            unchanged_materials = revision_comparison.get("unchanged_materials", [])
+            for material_data in unchanged_materials:
+                MaterialService._save_unchanged_material(db, file_id, material_data)
+                materials_inserted += 1
+                
+        # 분류가 필요한 자재 처리 (신규 또는 변경된 자재)
+        # revision_comparison에서 필터링된 목록이 있으면 그것을 사용, 아니면 전체
+        materials_to_classify = materials_data
+        if revision_comparison and revision_comparison.get("materials_to_classify"):
+            materials_to_classify = revision_comparison.get("materials_to_classify")
+            
+        print(f"🔧 자재 분류 및 저장 시작: {len(materials_to_classify)}개")
+        
+        for material_data in materials_to_classify:
+            MaterialService._classify_and_save_single_material(
+                db, file_id, material_data, 
+                changed_materials_keys, new_materials_keys,
+                purchased_materials_map
+            )
+            materials_inserted += 1
+            
+        return materials_inserted
+
+    @staticmethod
+    def _analyze_changes(db: Session, parent_file_id: int, materials_data: List[Dict], 
+                        changed_keys: set, new_keys: set):
+        """이전 리비전과 비교하여 변경/신규 자재를 식별합니다."""
+        try:
+            prev_materials_query = text("""
+                SELECT original_description, size_spec, material_grade, main_nom, 
+                       drawing_name, line_no, quantity
+                FROM materials
+                WHERE file_id = :parent_file_id
+            """)
+            prev_materials = db.execute(prev_materials_query, {"parent_file_id": parent_file_id}).fetchall()
+            
+            prev_dict = {}
+            for pm in prev_materials:
+                key = MaterialService._generate_material_key(
+                    pm.drawing_name, pm.line_no, pm.original_description, 
+                    pm.size_spec, pm.material_grade
+                )
+                prev_dict[key] = float(pm.quantity) if pm.quantity else 0
+            
+            for mat in materials_data:
+                new_key = MaterialService._generate_material_key(
+                    mat.get("dwg_name"), mat.get("line_num"), mat["original_description"],
+                    mat.get("size_spec"), mat.get("material_grade")
+                )
+                
+                if new_key in prev_dict:
+                    if abs(prev_dict[new_key] - float(mat.get("quantity", 0))) > 0.001:
+                        changed_keys.add(new_key)
+                else:
+                    new_keys.add(new_key)
+                    
+        except Exception as e:
+            print(f"❌ 변경사항 분석 실패: {e}")
+
+    @staticmethod
+    def _generate_material_key(dwg, line, desc, size, grade):
+        """자재 고유 키 생성"""
+        parts = []
+        if dwg: parts.append(str(dwg))
+        elif line: parts.append(str(line))
+        
+        parts.append(str(desc))
+        parts.append(str(size or ''))
+        parts.append(str(grade or ''))
+        return "|".join(parts)
+
+    @staticmethod
+    def _save_unchanged_material(db: Session, file_id: int, material_data: Dict):
+        """변경 없는(확정된) 자재 저장"""
+        previous_item = material_data.get("previous_item", {})
+        
+        query = text("""
+            INSERT INTO materials (
+                file_id, original_description, classified_category, confidence,
+                quantity, unit, size_spec, material_grade, specification,
+                reused_from_confirmation, created_at
+            ) VALUES (
+                :file_id, :desc, :category, 1.0,
+                :qty, :unit, :size, :grade, :spec,
+                TRUE, :created_at
+            )
+        """)
+        
+        db.execute(query, {
+            "file_id": file_id,
+            "desc": material_data["original_description"],
+            "category": previous_item.get("category", "UNCLASSIFIED"),
+            "qty": material_data["quantity"],
+            "unit": material_data.get("unit", "EA"),
+            "size": material_data.get("size_spec", ""),
+            "grade": previous_item.get("material", ""),
+            "spec": previous_item.get("specification", ""),
+            "created_at": datetime.now()
+        })
+
+    @staticmethod
+    def _classify_and_save_single_material(
+        db: Session, file_id: int, material_data: Dict,
+        changed_keys: set, new_keys: set, purchased_map: Optional[Dict]
+    ):
+        """단일 자재 분류 및 저장 (상세 정보 포함)"""
+        description = material_data["original_description"]
+        main_nom = material_data.get("main_nom", "")
+        red_nom = material_data.get("red_nom", "")
+        length_val = material_data.get("length")
+        
+        # 1. 통합 분류
+        integrated_result = classify_material_integrated(description, main_nom, red_nom, length_val)
+        classification_result = integrated_result
+        
+        # 2. 상세 분류
+        if not should_exclude_material(description):
+            category = integrated_result.get('category')
+            if category == "PIPE":
+                classification_result = classify_pipe_for_purchase("", description, main_nom, length_val)
+            elif category == "FITTING":
+                classification_result = classify_fitting("", description, main_nom, red_nom)
+            elif category == "FLANGE":
+                classification_result = classify_flange("", description, main_nom, red_nom)
+            elif category == "VALVE":
+                classification_result = classify_valve("", description, main_nom)
+            elif category == "BOLT":
+                classification_result = classify_bolt("", description, main_nom)
+            elif category == "GASKET":
+                classification_result = classify_gasket("", description, main_nom)
+            elif category == "INSTRUMENT":
+                classification_result = classify_instrument("", description, main_nom)
+            elif category == "SUPPORT":
+                classification_result = classify_support("", description, main_nom)
+            elif category == "PLATE":
+                classification_result = classify_plate("", description, main_nom)
+            elif category == "STRUCTURAL":
+                classification_result = classify_structural("", description, main_nom)
+                
+            # 신뢰도 조정
+            if integrated_result.get('confidence', 0) < 0.5:
+                classification_result['overall_confidence'] = min(
+                    classification_result.get('overall_confidence', 1.0),
+                    integrated_result.get('confidence', 0.0) + 0.2
+                )
+        else:
+             classification_result = {"category": "EXCLUDE", "overall_confidence": 0.95}
+
+        # 3. 구매 확정 정보 상속 확인
+        is_purchase_confirmed = False
+        purchase_confirmed_at = None
+        purchase_confirmed_by = None
+        
+        if purchased_map:
+            key = f"{description.strip().upper()}|{material_data.get('size_spec', '')}"
+            if key in purchased_map:
+                info = purchased_map[key]
+                is_purchase_confirmed = True
+                purchase_confirmed_at = info.get("purchase_confirmed_at")
+                purchase_confirmed_by = info.get("purchase_confirmed_by")
+
+        # 4. 자재 기본 정보 저장
+        full_grade = extract_full_material_grade(description) or material_data.get("material_grade", "")
+        
+        insert_query = text("""
+            INSERT INTO materials (
+                file_id, original_description, quantity, unit, size_spec,
+                main_nom, red_nom, material_grade, full_material_grade, line_number, row_number,
+                classified_category, classification_confidence, is_verified,
+                drawing_name, line_no, created_at,
+                purchase_confirmed, purchase_confirmed_at, purchase_confirmed_by,
+                revision_status
+            ) VALUES (
+                :file_id, :desc, :qty, :unit, :size,
+                :main, :red, :grade, :full_grade, :line_num, :row_num,
+                :category, :confidence, :verified,
+                :dwg, :line, :created_at,
+                :confirmed, :confirmed_at, :confirmed_by,
+                :status
+            ) RETURNING id
+        """)
+        
+        # 리비전 상태 결정
+        mat_key = MaterialService._generate_material_key(
+            material_data.get("dwg_name"), material_data.get("line_num"), description,
+            material_data.get("size_spec"), material_data.get("material_grade")
+        )
+        rev_status = 'changed' if mat_key in changed_keys else ('active' if mat_key in new_keys else None)
+        
+        result = db.execute(insert_query, {
+            "file_id": file_id,
+            "desc": description,
+            "qty": material_data["quantity"],
+            "unit": material_data["unit"],
+            "size": material_data.get("size_spec", ""),
+            "main": main_nom,
+            "red": red_nom,
+            "grade": material_data.get("material_grade", ""),
+            "full_grade": full_grade,
+            "line_num": material_data.get("line_number"),
+            "row_num": material_data.get("row_number"),
+            "category": classification_result.get("category", "UNCLASSIFIED"),
+            "confidence": classification_result.get("overall_confidence", 0.0),
+            "verified": False,
+            "dwg": material_data.get("dwg_name"),
+            "line": material_data.get("line_num"),
+            "created_at": datetime.now(),
+            "confirmed": is_purchase_confirmed,
+            "confirmed_at": purchase_confirmed_at,
+            "confirmed_by": purchase_confirmed_by,
+            "status": rev_status
+        })
+        
+        material_id = result.fetchone()[0]
+        
+        # 5. 상세 정보 저장 (별도 메서드로 분리)
+        MaterialService._save_material_details(
+            db, material_id, file_id, classification_result, material_data
+        )
+
+    @staticmethod
+    def _save_material_details(db: Session, material_id: int, file_id: int, 
+                             result: Dict, data: Dict):
+        """카테고리별 상세 정보 저장"""
+        category = result.get("category")
+        
+        if category == "PIPE":
+            MaterialService._save_pipe_details(db, material_id, file_id, result, data)
+        elif category == "FITTING":
+            MaterialService._save_fitting_details(db, material_id, file_id, result, data)
+        elif category == "FLANGE":
+            MaterialService._save_flange_details(db, material_id, file_id, result, data)
+        elif category == "BOLT":
+            MaterialService._save_bolt_details(db, material_id, file_id, result, data)
+        elif category == "VALVE":
+            MaterialService._save_valve_details(db, material_id, file_id, result, data)
+        elif category == "GASKET":
+            MaterialService._save_gasket_details(db, material_id, file_id, result, data)
+        elif category == "SUPPORT":
+            MaterialService._save_support_details(db, material_id, file_id, result, data)
+        elif category == "PLATE":
+            MaterialService._save_plate_details(db, material_id, file_id, result, data)
+        elif category == "STRUCTURAL":
+            MaterialService._save_structural_details(db, material_id, file_id, result, data)
+
+    @staticmethod
+    def _save_plate_details(db: Session, mid: int, fid: int, res: Dict, data: Dict):
+        """판재 정보 업데이트 (현재는 materials 테이블에 요약 정보 저장)"""
+        details = res.get("details", {})
+        spec = f"{details.get('thickness')}T x {details.get('dimensions')}"
+        db.execute(text("""
+            UPDATE materials 
+            SET size_spec = :size, material_grade = :mat
+            WHERE id = :id
+        """), {"size": spec, "mat": details.get("material"), "id": mid})
+
+    @staticmethod
+    def _save_structural_details(db: Session, mid: int, fid: int, res: Dict, data: Dict):
+        """형강 정보 업데이트 (현재는 materials 테이블에 요약 정보 저장)"""
+        details = res.get("details", {})
+        spec = f"{details.get('type')} {details.get('dimension')}"
+        db.execute(text("""
+            UPDATE materials 
+            SET size_spec = :size
+            WHERE id = :id
+        """), {"size": spec, "id": mid})
+
+    # --- 각 카테고리별 상세 저장 메서드들 (기존 로직 이관) ---
+    
+    @staticmethod
+    def inherit_purchase_requests(db: Session, current_file_id: int, parent_file_id: int):
+        """이전 리비전의 구매신청 정보를 상속합니다."""
+        try:
+            print(f"🔄 구매신청 정보 상속 처리 시작...")
+            
+            # 1. 이전 리비전에서 그룹별 구매신청 수량 집계
+            prev_purchase_summary = text("""
+                SELECT 
+                    m.original_description,
+                    m.size_spec,
+                    m.material_grade,
+                    m.drawing_name,
+                    COUNT(DISTINCT pri.material_id) as purchased_count,
+                    SUM(pri.quantity) as total_purchased_qty,
+                    MIN(pri.request_id) as request_id
+                FROM materials m
+                JOIN purchase_request_items pri ON m.id = pri.material_id
+                WHERE m.file_id = :parent_file_id
+                GROUP BY m.original_description, m.size_spec, m.material_grade, m.drawing_name
+            """)
+            
+            prev_purchases = db.execute(prev_purchase_summary, {"parent_file_id": parent_file_id}).fetchall()
+            
+            # 2. 새 리비전에서 같은 그룹의 자재에 수량만큼 구매신청 상속
+            for prev_purchase in prev_purchases:
+                purchased_count = prev_purchase.purchased_count
+                
+                # 새 리비전에서 같은 그룹의 자재 조회 (순서대로)
+                new_group_materials = text("""
+                    SELECT id, quantity
+                    FROM materials
+                    WHERE file_id = :file_id
+                    AND original_description = :description
+                    AND COALESCE(size_spec, '') = :size_spec
+                    AND COALESCE(material_grade, '') = :material_grade
+                    AND COALESCE(drawing_name, '') = :drawing_name
+                    ORDER BY id
+                    LIMIT :limit
+                """)
+                
+                new_materials = db.execute(new_group_materials, {
+                    "file_id": current_file_id,
+                    "description": prev_purchase.original_description,
+                    "size_spec": prev_purchase.size_spec or '',
+                    "material_grade": prev_purchase.material_grade or '',
+                    "drawing_name": prev_purchase.drawing_name or '',
+                    "limit": purchased_count
+                }).fetchall()
+                
+                # 구매신청 수량만큼만 상속
+                for new_mat in new_materials:
+                    inherit_query = text("""
+                        INSERT INTO purchase_request_items (
+                            request_id, material_id, quantity, unit, user_requirement
+                        ) VALUES (
+                            :request_id, :material_id, :quantity, 'EA', ''
+                        )
+                        ON CONFLICT DO NOTHING
+                    """)
+                    db.execute(inherit_query, {
+                        "request_id": prev_purchase.request_id,
+                        "material_id": new_mat.id,
+                        "quantity": new_mat.quantity
+                    })
+                
+                inherited_count = len(new_materials)
+                if inherited_count > 0:
+                    print(f"  ✅ {prev_purchase.original_description[:30]}... (도면: {prev_purchase.drawing_name or 'N/A'}) → {inherited_count}/{purchased_count}개 상속")
+            
+            # 커밋은 호출하는 쪽에서 일괄 처리하거나 여기서 처리
+            # db.commit() 
+            print(f"✅ 구매신청 정보 상속 완료")
+            
+        except Exception as e:
+            print(f"❌ 구매신청 정보 상속 실패: {str(e)}")
+            # 상속 실패는 전체 프로세스를 중단하지 않음
+
+    @staticmethod
+    def _save_pipe_details(db, mid, fid, res, data):
+        # PIPE 상세 저장 로직
+        end_prep_info = extract_end_preparation_info(data["original_description"])
+        
+        # 1. End Prep 정보 저장
+        db.execute(text("""
+            INSERT INTO pipe_end_preparations (
+                material_id, file_id, end_preparation_type, end_preparation_code,
+                machining_required, cutting_note, original_description, confidence
+            ) VALUES (
+                :mid, :fid, :type, :code, :req, :note, :desc, :conf
+            )
+        """), {
+            "mid": mid, "fid": fid,
+            "type": end_prep_info["end_preparation_type"],
+            "code": end_prep_info["end_preparation_code"],
+            "req": end_prep_info["machining_required"],
+            "note": end_prep_info["cutting_note"],
+            "desc": end_prep_info["original_description"],
+            "conf": end_prep_info["confidence"]
+        })
+        
+        # 2. Pipe Details 저장
+        length_info = res.get("length_info", {})
+        length_mm = length_info.get("length_mm") or data.get("length", 0.0)
+        
+        mat_info = res.get("material", {})
+        sch_info = res.get("schedule", {})
+        
+        # 재질 정보 업데이트
+        if mat_info.get("grade"):
+            db.execute(text("UPDATE materials SET material_grade = :g WHERE id = :id"), 
+                      {"g": mat_info.get("grade"), "id": mid})
+
+        db.execute(text("""
+            INSERT INTO pipe_details (
+                material_id, file_id, outer_diameter, schedule,
+                material_spec, manufacturing_method, length_mm
+            ) VALUES (:mid, :fid, :od, :sch, :spec, :method, :len)
+        """), {
+            "mid": mid, "fid": fid,
+            "od": data.get("main_nom") or data.get("size_spec"),
+            "sch": sch_info.get("schedule", "UNKNOWN") if isinstance(sch_info, dict) else str(sch_info),
+            "spec": mat_info.get("grade", "") if isinstance(mat_info, dict) else "",
+            "method": res.get("manufacturing", {}).get("method", "UNKNOWN") if isinstance(res.get("manufacturing"), dict) else "UNKNOWN",
+            "len": length_mm or 0.0
+        })
+
+    @staticmethod
+    def _save_fitting_details(db, mid, fid, res, data):
+        fit_type = res.get("fitting_type", {})
+        mat_info = res.get("material", {})
+        
+        if mat_info.get("grade"):
+            db.execute(text("UPDATE materials SET material_grade = :g WHERE id = :id"), 
+                      {"g": mat_info.get("grade"), "id": mid})
+
+        db.execute(text("""
+            INSERT INTO fitting_details (
+                material_id, file_id, fitting_type, fitting_subtype,
+                connection_method, pressure_rating, material_grade,
+                main_size, reduced_size
+            ) VALUES (:mid, :fid, :type, :subtype, :conn, :rating, :grade, :main, :red)
+        """), {
+            "mid": mid, "fid": fid,
+            "type": fit_type.get("type", "UNKNOWN") if isinstance(fit_type, dict) else str(fit_type),
+            "subtype": fit_type.get("subtype", "UNKNOWN") if isinstance(fit_type, dict) else "UNKNOWN",
+            "conn": res.get("connection_method", {}).get("method", "UNKNOWN") if isinstance(res.get("connection_method"), dict) else "UNKNOWN",
+            "rating": res.get("pressure_rating", {}).get("rating", "UNKNOWN") if isinstance(res.get("pressure_rating"), dict) else "UNKNOWN",
+            "grade": mat_info.get("grade", "") if isinstance(mat_info, dict) else "",
+            "main": data.get("main_nom") or data.get("size_spec"),
+            "red": data.get("red_nom", "")
+        })
+
+    @staticmethod
+    def _save_flange_details(db, mid, fid, res, data):
+        flg_type = res.get("flange_type", {})
+        mat_info = res.get("material", {})
+
+        if mat_info.get("grade"):
+            db.execute(text("UPDATE materials SET material_grade = :g WHERE id = :id"), 
+                      {"g": mat_info.get("grade"), "id": mid})
+
+        db.execute(text("""
+            INSERT INTO flange_details (
+                material_id, file_id, flange_type, pressure_rating,
+                facing_type, material_grade, size_inches
+            ) VALUES (:mid, :fid, :type, :rating, :face, :grade, :size)
+        """), {
+            "mid": mid, "fid": fid,
+            "type": flg_type.get("type", "UNKNOWN") if isinstance(flg_type, dict) else str(flg_type),
+            "rating": res.get("pressure_rating", {}).get("rating", "UNKNOWN") if isinstance(res.get("pressure_rating"), dict) else "UNKNOWN",
+            "face": res.get("face_finish", {}).get("finish", "UNKNOWN") if isinstance(res.get("face_finish"), dict) else "UNKNOWN",
+            "grade": mat_info.get("grade", "") if isinstance(mat_info, dict) else "",
+            "size": data.get("main_nom") or data.get("size_spec")
+        })
+
+    @staticmethod
+    def _save_bolt_details(db, mid, fid, res, data):
+        fast_type = res.get("fastener_type", {})
+        mat_info = res.get("material", {})
+        dim_info = res.get("dimensions", {})
+        
+        if mat_info.get("grade"):
+            db.execute(text("UPDATE materials SET material_grade = :g WHERE id = :id"), 
+                      {"g": mat_info.get("grade"), "id": mid})
+
+        # 볼트 타입 결정 (특수 용도 고려)
+        bolt_type = fast_type.get("type", "UNKNOWN") if isinstance(fast_type, dict) else str(fast_type)
+        special_apps = res.get("special_applications", {}).get("detected_applications", [])
+        if "LT" in special_apps: bolt_type = "LT_BOLT"
+        elif "PSV" in special_apps: bolt_type = "PSV_BOLT"
+
+        # 코팅 타입
+        desc_upper = data["original_description"].upper()
+        coating = "UNKNOWN"
+        if "GALV" in desc_upper: coating = "GALVANIZED"
+        elif "ZINC" in desc_upper: coating = "ZINC_PLATED"
+
+        db.execute(text("""
+            INSERT INTO bolt_details (
+                material_id, file_id, bolt_type, thread_type,
+                diameter, length, material_grade, coating_type
+            ) VALUES (:mid, :fid, :type, :thread, :dia, :len, :grade, :coating)
+        """), {
+            "mid": mid, "fid": fid,
+            "type": bolt_type,
+            "thread": res.get("thread_specification", {}).get("standard", "UNKNOWN") if isinstance(res.get("thread_specification"), dict) else "UNKNOWN",
+            "dia": dim_info.get("nominal_size", data.get("main_nom", "")),
+            "len": dim_info.get("length", ""),
+            "grade": mat_info.get("grade", "") if isinstance(mat_info, dict) else "",
+            "coating": coating
+        })
+
+    @staticmethod
+    def _save_valve_details(db, mid, fid, res, data):
+        val_type = res.get("valve_type", {})
+        mat_info = res.get("material", {})
+        
+        if mat_info.get("grade"):
+            db.execute(text("UPDATE materials SET material_grade = :g WHERE id = :id"), 
+                      {"g": mat_info.get("grade"), "id": mid})
+
+        db.execute(text("""
+            INSERT INTO valve_details (
+                material_id, file_id, valve_type, connection_method, 
+                pressure_rating, body_material, size_inches
+            ) VALUES (:mid, :fid, :type, :conn, :rating, :body, :size)
+        """), {
+            "mid": mid, "fid": fid,
+            "type": val_type.get("type", "UNKNOWN") if isinstance(val_type, dict) else str(val_type),
+            "conn": res.get("connection_method", {}).get("method", "UNKNOWN") if isinstance(res.get("connection_method"), dict) else "UNKNOWN",
+            "rating": res.get("pressure_rating", {}).get("rating", "UNKNOWN") if isinstance(res.get("pressure_rating"), dict) else "UNKNOWN",
+            "body": mat_info.get("grade", "") if isinstance(mat_info, dict) else "",
+            "size": data.get("main_nom") or data.get("size_spec")
+        })
+
+    @staticmethod
+    def _save_gasket_details(db, mid, fid, res, data):
+        gask_type = res.get("gasket_type", {})
+        
+        db.execute(text("""
+            INSERT INTO gasket_details (
+                material_id, file_id, gasket_type, pressure_rating, size_inches
+            ) VALUES (:mid, :fid, :type, :rating, :size)
+        """), {
+            "mid": mid, "fid": fid,
+            "type": gask_type.get("type", "UNKNOWN") if isinstance(gask_type, dict) else str(gask_type),
+            "rating": res.get("pressure_rating", {}).get("rating", "UNKNOWN") if isinstance(res.get("pressure_rating"), dict) else "UNKNOWN",
+            "size": data.get("main_nom") or data.get("size_spec")
+        })
+
+    @staticmethod
+    def _save_support_details(db, mid, fid, res, data):
+        db.execute(text("""
+            INSERT INTO support_details (
+                material_id, file_id, support_type, pipe_size
+            ) VALUES (:mid, :fid, :type, :size)
+        """), {
+            "mid": mid, "fid": fid,
+            "type": res.get("support_type", "UNKNOWN"),
+            "size": res.get("size_info", {}).get("pipe_size", "")
+        })

backend/app/services/plate_classifier.py

@@ -0,0 +1,50 @@
+
+import re
+from typing import Dict, Optional
+
+def classify_plate(tag: str, description: str, main_nom: str = "") -> Dict:
+    """
+    판재(PLATE) 분류기
+    규격 예: PLATE 10T x 1219 x 2438
+    """
+    desc_upper = description.upper()
+    
+    # 1. 두께(Thickness) 추출
+    # 패턴: 10T, 10.5T, THK 10, THK. 10, t=10
+    thickness = None
+    t_match = re.search(r'(\d+(?:\.\d+)?)\s*T\b', desc_upper)
+    if not t_match:
+        t_match = re.search(r'(?:THK\.?|t=)\s*(\d+(?:\.\d+)?)', desc_upper, re.IGNORECASE)
+    
+    if t_match:
+        thickness = t_match.group(1)
+        
+    # 2. 규격(Dimensions) 추출
+    # 패턴: 1219x2438, 4'x8', 1000*2000
+    dimensions = ""
+    dim_match = re.search(r'(\d+(?:\.\d+)?)\s*[X\*]\s*(\d+(?:\.\d+)?)(?:\s*[X\*]\s*(\d+(?:\.\d+)?))?', desc_upper)
+    if dim_match:
+        groups = [g for g in dim_match.groups() if g]
+        dimensions = " x ".join(groups)
+
+    # 3. 재질 추출
+    material = "UNKNOWN"
+    # 압력용기용 및 일반 구조용 강판 재질 추가
+    plate_materials = [
+        "SUS304", "SUS316", "SUS321", "SS400", "A36", "SM490", 
+        "SA516", "A516", "SA283", "A283", "SA537", "A537", "POS-M"
+    ]
+    for mat in plate_materials:
+        if mat in desc_upper:
+            material = mat
+            break
+
+    return {
+        "category": "PLATE",
+        "overall_confidence": 0.9,
+        "details": {
+            "thickness": thickness,
+            "dimensions": dimensions,
+            "material": material
+        }
+    }

backend/app/services/structural_classifier.py

@@ -0,0 +1,34 @@
+
+import re
+from typing import Dict
+
+def classify_structural(tag: str, description: str, main_nom: str = "") -> Dict:
+    """
+    형강(STRUCTURAL) 분류기
+    규격 예: H-BEAM 100x100x6x8
+    """
+    desc_upper = description.upper()
+    
+    # 1. 타입 식별
+    struct_type = "UNKNOWN"
+    if "H-BEAM" in desc_upper or "H-SECTION" in desc_upper: struct_type = "H-BEAM"
+    elif "ANGLE" in desc_upper or "L-SECTION" in desc_upper: struct_type = "ANGLE"
+    elif "CHANNEL" in desc_upper or "C-SECTION" in desc_upper: struct_type = "CHANNEL"
+    elif "BEAM" in desc_upper: struct_type = "I-BEAM"
+
+    # 2. 규격 추출
+    # 패턴: 100x100, 100x100x6x8, 50x50x5T, H-200x200
+    dimension = ""
+    # 숫자와 x 또는 *로 구성된 패턴, 앞에 H- 등이 붙을 수 있음
+    dim_match = re.search(r'(?:H-|L-|C-)?(\d+(?:\.\d+)?(?:\s*[X\*]\s*\d+(?:\.\d+)?){1,3})', desc_upper)
+    if dim_match:
+        dimension = dim_match.group(1).replace("*", "x")
+
+    return {
+        "category": "STRUCTURAL",
+        "overall_confidence": 0.9,
+        "details": {
+            "type": struct_type,
+            "dimension": dimension
+        }
+    }