Vehicle Restraint System for Detachable Door Status Detection
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Solution Overview
Problem
Existing vehicle restraint systems face challenges in accurately detecting whether detachable doors are attached or detached, leading to potential misoperation and false fault notifications when doors are detached during off-roading or other driving conditions.
Innovation Solution
A method and system where a restraint control module operates the restraint system based on a door status signal from a detachable door when it is attached, but operates independently without this signal when the door is detached, using a door sensor and CAN signals to determine the door's status and provide user notifications as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the restraint system relies on door sensor signals when the detachable door is detached, then the system may provide continuous monitoring capability, but false fault notifications occur and system operation becomes unreliable
Solution Approach 1:
The restraint control module proactively determines door attachment status by checking for the presence of door status signals before relying on door sensor data. This preliminary detection prevents false fault notifications by establishing the door's attachment state in advance, allowing the system to adjust its monitoring behavior accordingly.
Solution Approach 2:
The system dynamically adjusts its operation mode based on door attachment status. When the door is attached, the restraint system utilizes door sensor signals for comprehensive monitoring. When the door is detached, the system automatically switches to an independent operation mode that does not rely on door sensor signals, thereby maintaining reliability and preventing false fault notifications.
2Reliability
If the restraint system operates independently without door sensor signals when the door is detached, then false fault notifications are avoided, but the system must accurately detect door attachment status
Solution Approach 1:
The system uses door status signals as an intermediary indicator to infer door attachment status. Instead of directly detecting physical attachment, the restraint control module monitors the presence or absence of door status signals from the door control module, which serves as a reliable proxy for determining whether the door is attached or detached.
3Loss of information
If the system provides door status notifications to the user, then user awareness is enhanced, but additional communication functions are required
Solution Approach 1:
The restraint control module performs multiple functions: it monitors door attachment status, controls restraint system operation, and communicates door status to the user. By integrating these functions into a single control module, the system avoids adding separate dedicated notification hardware, thereby enhancing user awareness while minimizing increases in device complexity.
Data Source
AI summary
A restraint system operating method includes, among other things, when a detachable door is attached to a vehicle, operating a restraint system of a vehicle at least in part in response to a signal from a door sensor of the detachable door. When the detachable door is detached from the vehicle, the method operates the restraint system of the vehicle without relying on the signal from the door sensor.