Commercial Vehicle Seat Occupancy Detection Across Seat and Backrest
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Solution Overview
Problem
Existing seat occupancy detection systems in commercial vehicles can incorrectly detect the seat as unoccupied when the occupant turns and shifts weight, leading to disruptions in the occupant's workflow.
Innovation Solution
The implementation of a dual detection system comprising a first detection device for the seat part and a second detection device for the backrest, which outputs a seat occupancy state only if both devices detect occupancy, thereby reducing false unoccupied signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single detection device is used in the seat part, then the device complexity is low, but the reliability of seat occupancy detection deteriorates when the occupant shifts weight
Solution Approach 1:
The detection system is segmented into two independent detection devices: a first detection device in the seat part and a second detection device in the backrest. Each device independently monitors occupancy in its respective zone, and the system evaluates both signals to determine overall seat occupancy. This segmentation ensures that weight shifts between seat and backrest do not cause false unoccupied signals, thereby resolving the reliability issue while maintaining manageable system complexity through modular design.
2Reliability
If the detection system requires both detection devices to confirm occupancy, then the reliability improves, but the device complexity increases
Solution Approach 1:
The evaluation unit merges the output signals from the first detection device (seat part) and the second detection device (backrest) into a unified seat occupancy determination. The system combines both detection results using a logical OR operation: if either device detects occupancy, the seat is considered occupied. This merging approach enhances reliability by cross-validating occupancy across different zones while maintaining straightforward evaluation logic that does not significantly increase system complexity.
Data Source
AI summary
The invention relates to a vehicle seat, in particular for commercial vehicles, comprising a seat part and a backrest, wherein the vehicle seat has an apparatus for detecting seat occupancy, which comprises at least one first detection device and at least one second detection device, wherein the at least one first detection device is suitable and intended for detecting occupancy of the seat part, wherein the at least one second detection device is suitable and intended for detecting occupancy of the backrest.