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| """ ZF LIFETEC 集成被动安全系统 座舱感知 → 自适应约束部署
传感器: 光学摄像头 + 座椅载荷传感器 + 安全带位移传感器 执行器: Dual Contour Airbag + ACR.8 主动安全带 """
from dataclasses import dataclass from typing import Dict, Tuple
@dataclass class OccupantProfile: """乘员分类结果""" mass_kg: float stature: str posture: str seat_distance_m: float seatbelt_status: str oop_risk: str
class CabinPerceptionSystem: """ ZF LIFETEC 座舱感知系统 传感器输入: 1. 光学摄像头 (乘员姿态/位置) 2. 座椅载荷传感器 (体重/尺寸) 3. 安全带锁扣位移传感器 (安全带状态) 输出: OccupantProfile """ def __init__(self): self.sensors = { 'optical_camera': {'type': 'interior_camera', 'fps': 30}, 'seat_load_cells': {'type': 'weight_sensor', 'hz': 10}, 'belt_latch_sensor': {'type': 'displacement', 'hz': 100}, 'belt_buckle_sensor': {'type': 'status', 'hz': 10}, } def classify_occupant(self, camera_data, weight_data, belt_data) -> OccupantProfile: """ 乘员分类 输出用于约束系统决策 """ if weight_data['mass'] < 45: stature = 'small' elif weight_data['mass'] < 75: stature = 'medium' else: stature = 'large' posture = self._classify_posture(camera_data) belt_status = self._check_belt(belt_data) oop_risk = self._assess_oop_risk(posture, belt_status, camera_data['distance']) return OccupantProfile( mass_kg=weight_data['mass'], stature=stature, posture=posture, seat_distance_m=camera_data['distance'], seatbelt_status=belt_status, oop_risk=oop_risk ) def _classify_posture(self, camera_data): """从摄像头数据分类姿态""" if camera_data['torso_angle'] > 20: return 'reclined' elif camera_data['torso_angle'] < -15: return 'forward_lean' elif abs(camera_data['lateral_offset']) > 15: return 'side_lean' else: return 'normal' def _check_belt(self, belt_data): """安全带状态检测""" if not belt_data['buckled']: return 'unbuckled' elif belt_data['displacement'] > 0.05: return 'misuse' return 'normal' def _assess_oop_risk(self, posture, belt_status, distance): """OOP风险评估""" if belt_status in ['unbuckled', 'misuse']: return 'high' if posture in ['reclined', 'forward_lean']: return 'high' if distance < 0.25: return 'high' if posture == 'side_lean': return 'medium' return 'low'
class AdaptiveRestraintSystem: """ ZF LIFETEC 自适应约束系统 执行器: 1. Dual Contour Airbag (60L/90L可变体积) 2. ACR.8 主动控制安全带 (多级张力) """ def __init__(self): self.airbag_min_volume = 60 self.airbag_max_volume = 90 self.belt_pre_crash_force = 200 self.belt_pyro_force_max = 6000 self.belt_load_limit_small = 2500 self.belt_load_limit_large = 4500 def compute_restraint_profile(self, occupant: OccupantProfile, crash_severity: str) -> Dict: """ 根据乘员特征+碰撞严重度计算约束参数 Args: occupant: 乘员分类 crash_severity: 'low'/'medium'/'high'/'severe' Returns: restraint_params: 气囊和安全带参数 """ params = {} if occupant.stature == 'small' or occupant.seat_distance_m < 0.35: airbag_volume = self.airbag_min_volume elif occupant.stature == 'large' and occupant.seat_distance_m > 0.55: airbag_volume = self.airbag_max_volume else: airbag_volume = 75 if occupant.oop_risk == 'high': airbag_volume = 0 params['airbag_volume'] = airbag_volume params['airbag_vent_mode'] = 'open' if airbag_volume > 0 else 'disabled' params['belt_pre_crash'] = self.belt_pre_crash_force if \ crash_severity in ['medium', 'high'] else 0 params['belt_pyro_force'] = min( self.belt_pyro_force_max, self.belt_load_limit_large if occupant.stature == 'large' else self.belt_load_limit_small ) if occupant.stature == 'small': params['load_limiter'] = [2500, 2000, 1500] elif occupant.stature == 'medium': params['load_limiter'] = [3500, 3000, 2500] else: params['load_limiter'] = [4500, 4000, 3500] if occupant.seatbelt_status == 'misuse': params['warning_level'] = 2 params['belt_pre_crash'] = 300 elif occupant.seatbelt_status == 'unbuckled': params['warning_level'] = 3 params['airbag_volume'] = 0 return params
if __name__ == "__main__": perception = CabinPerceptionSystem() restraint = AdaptiveRestraintSystem() print("=" * 60) print("ZF LIFETEC 集成被动安全系统仿真") print("=" * 60) scenarios = [ { 'name': '正常成人 (大个子)', 'camera': {'distance': 0.55, 'torso_angle': 5, 'lateral_offset': 2}, 'weight': {'mass': 85}, 'belt': {'buckled': True, 'displacement': 0.01}, 'crash': 'high' }, { 'name': '小个子女性 (近距离)', 'camera': {'distance': 0.30, 'torso_angle': 10, 'lateral_offset': 5}, 'weight': {'mass': 48}, 'belt': {'buckled': True, 'displacement': 0.02}, 'crash': 'high' }, { 'name': '后仰姿态 (OOP高风险)', 'camera': {'distance': 0.70, 'torso_angle': 35, 'lateral_offset': 0}, 'weight': {'mass': 70}, 'belt': {'buckled': True, 'displacement': 0.01}, 'crash': 'high' }, { 'name': '安全带误用 (肩下)', 'camera': {'distance': 0.50, 'torso_angle': 5, 'lateral_offset': 3}, 'weight': {'mass': 65}, 'belt': {'buckled': True, 'displacement': 0.08}, 'crash': 'medium' }, { 'name': '未系安全带', 'camera': {'distance': 0.50, 'torso_angle': 5, 'lateral_offset': 0}, 'weight': {'mass': 75}, 'belt': {'buckled': False, 'displacement': 0}, 'crash': 'high' }, ] for scenario in scenarios: print(f"\n--- {scenario['name']} ---") occupant = perception.classify_occupant( scenario['camera'], scenario['weight'], scenario['belt'] ) print(f" 乘员: {occupant.stature}, {occupant.mass_kg}kg, " f"姿态={occupant.posture}") print(f" 距离: {occupant.seat_distance_m:.2f}m, " f"安全带={occupant.seatbelt_status}, " f"OOP风险={occupant.oop_risk}") params = restraint.compute_restraint_profile( occupant, scenario['crash'] ) print(f" 气囊体积: {params['airbag_volume']}L " f"({'禁用' if params['airbag_volume'] == 0 else '启用'})") print(f" 安全带预碰撞张力: {params['belt_pre_crash']}N") print(f" 安全带火药张力: {params['belt_pyro_force']}N") print(f" 限力曲线: {params['load_limiter']}N") if 'warning_level' in params: print(f" ⚠️ 警告等级: {params['warning_level']}")
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