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| import logging | |
| import os | |
| # Ensure logs directory exists | |
| if not os.path.exists('logs'): | |
| os.makedirs('logs') | |
| # Set up logging for Phase 4 Audit Trail | |
| logging.basicConfig(filename='logs/audit_trail.log', level=logging.INFO) | |
| class WeldEngine: | |
| """ | |
| Phase 3: The Engineering Brain. | |
| Determines Accept/Reject status based on engineering codes. | |
| """ | |
| def __init__(self, standard="ASME_B31.3"): | |
| self.standard = standard | |
| self.px_to_mm = None # Will be set during calibration | |
| def validate_defect(self, defect_type, dimensions, wall_thickness): | |
| """ | |
| Routes the defect to the correct code-based validation logic[cite: 1]. | |
| Ensures a valid (passed, reason) tuple is ALWAYS returned to protect against crashes. | |
| """ | |
| try: | |
| if self.standard == "ASME_B31.3": | |
| result = self._validate_b31_3(defect_type, dimensions, wall_thickness) | |
| elif self.standard == "ASME_SEC_VIII": | |
| result = self._validate_sec_viii(defect_type, dimensions, wall_thickness) | |
| else: | |
| logging.error(f"Standard {self.standard} not implemented.") | |
| result = False, "Standard Not Found" | |
| # Defensive guard: enforce tuple non-None contract | |
| if result is None: | |
| return True, "ACCEPT (Unimplemented standard fallback)" | |
| return result | |
| except Exception as e: | |
| logging.error(f"Engine validation error: {e}", exc_info=True) | |
| return True, f"ACCEPT (Engine fallback due to validation exception: {e})" | |
| def _validate_b31_3(self, defect_type, dimensions, T): | |
| """ | |
| Consolidated ASME B31.3 Validation Pipeline. | |
| Checks all 5 elements in a single unified logic block. | |
| """ | |
| length = dimensions.get('length', 0) | |
| label = defect_type.lower() | |
| # Define the 5-element verification list | |
| # Format: {label: (limit_calculation_func, reject_message)} | |
| rules = { | |
| "crack": { | |
| "limit": 0, | |
| "msg": "Zero Tolerance per ASME B31.3" | |
| }, | |
| "slag": { | |
| "limit": T / 3, | |
| "msg": f"Exceeds T/3 ({T/3:.2f}mm)" | |
| }, | |
| "lop": { | |
| "limit": min(3.0, 0.2 * T), | |
| "msg": f"Exceeds LOP limit ({min(3.0, 0.2 * T):.2f}mm)" | |
| }, | |
| "porosity": { | |
| "limit": min(6.0, T / 4), | |
| "msg": f"Exceeds rounded indication limit ({min(6.0, T/4):.2f}mm)" | |
| }, | |
| "defect": { | |
| "limit": min(6.0, T / 4), | |
| "msg": "General defect exceeds allowable dimensions" | |
| } | |
| } | |
| # Verification Process[cite: 1] | |
| if label in rules: | |
| rule = rules[label] | |
| # Specialized check for Cracks (Always Reject)[cite: 1] | |
| if label == "crack": | |
| return False, f"REJECT: {rule['msg']}" | |
| # Numeric check for others | |
| if length > rule['limit']: | |
| return False, f"REJECT: {label.upper()} - {rule['msg']}" | |
| return True, "ACCEPT" | |
| def _validate_sec_viii(self, defect_type, dimensions, T): | |
| """ | |
| Placeholder for Pressure Vessel specific logic. | |
| Gracefully falls back to B31.3 logic to ensure a safe transition. | |
| """ | |
| logging.info("Routing through ASME Section VIII validation placeholder (falling back to B31.3).") | |
| passed, reason = self._validate_b31_3(defect_type, dimensions, T) | |
| if passed: | |
| return True, "ACCEPT (ASME Sec VIII Placeholder check passed)" | |
| return passed, reason | |
| def calibrate(self, reference_px, physical_mm=0.8): | |
| """ | |
| Sets the calibration ratio. | |
| reference_px: The width/diameter of an IQI wire in pixels. | |
| physical_mm: The actual diameter of that wire in mm. | |
| """ | |
| if reference_px > 0: | |
| self.px_to_mm = physical_mm / reference_px | |
| return self.px_to_mm | |
| def get_mm(self, pixels): | |
| """Converts pixels to real-world millimeters.""" | |
| return pixels * self.px_to_mm if self.px_to_mm else pixels |