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4d515bc | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 | 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 |