Vehicle Restraint Monitoring for Strap Position and Buckle Verification
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Solution Overview
Problem
Existing vehicle restraint systems lack effective mechanisms to ensure that the restraint system is properly secured before and during vehicle movement, which can lead to passengers unintentionally shifting during rapid deceleration or other unforeseen situations.
Innovation Solution
The system employs RFID tags and buckle sensors to detect whether belt tongues are latched to buckles, and uses light sources and sensors to verify the position of straps, with a computing device determining if the restraint system is correctly secured, and outputs an indication of its status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional restraint systems without detection mechanisms are used, then the device complexity is reduced, but the reliability of ensuring proper restraint securing is worsened
Solution Approach 1:
The system performs preliminary detection of restraint system status before vehicle operation begins. The buckle sensors and RFID tags verify that all seat belts are properly fastened and positioned before the vehicle is allowed to operate, preventing unsafe conditions from developing during motion
Solution Approach 2:
The system continuously monitors restraint system status through RFID tags and buckle sensors that provide real-time feedback to the control system. This feedback mechanism allows the system to detect improper restraint usage and alert passengers or prevent vehicle operation until proper restraint is confirmed
2Measurement precision
If multiple sensors and detection mechanisms are added to monitor restraint system status, then the measurement precision of restraint position is improved, but the device complexity increases
Solution Approach 1:
The RFID tags serve multiple functions simultaneously: they track the belt tongue position, verify buckle engagement, and provide identification for the detection system. This multi-functionality reduces the need for separate sensors for each detection task, thereby improving measurement precision without proportionally increasing system complexity
Solution Approach 2:
The RFID tags act as intermediaries between the physical restraint components and the electronic detection system. Rather than requiring direct electronic sensors at each restraint point, the passive RFID tags transmit position and status information wirelessly, simplifying the overall sensor architecture while maintaining high detection precision
Data Source
AI summary
A vehicle includes a restraint system, one or more sensors, one or more light sources, and a computing device. The restraint system comprises one or more belt tongues, a buckle configured to latch to the one or more belt tongues, and one or more straps each attached to the buckle or at least one of the one or more belt tongues. The computing device is configured to receive, from the one or more sensors, image data while the one or more light sources are illuminating the restraint system. The computing device is also configured to determine, based on the image data, a position for each of the straps. The computing device is additionally configured to verify whether the position of each of the straps is in a respective predetermined location and output an indication of whether each of the straps are in the respective predetermined location.