Bidirectional Error Moment Absorption in Vehicle Seat Weight Sensors
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Solution Overview
Problem
Existing passenger identification devices with weight sensors face challenges in effectively absorbing complex error moments, leading to potential injuries during vehicle collisions, especially for children or individuals of smaller stature, due to the complexity of manufacturing and limited bidirectional error moment absorption capabilities.
Innovation Solution
A passenger identification device with a bidirectional error moment absorption structure, featuring a stud unit, base bracket, upper and lower dampers, and sleeves, which distribute load and improve durability by simplifying the manufacturing process through a modified design that includes through-holes, via-holes, and support units to enhance error moment absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single damper and single sleeve structure is used to absorb error moment, then the manufacturing process becomes complicated due to forming requirements, but the error moment absorption capability is insufficient for complex bidirectional moments
Solution Approach 1:
The single damper structure is segmented into upper and lower dampers positioned at opposite ends of the base bracket. Each damper handles specific directional error moments independently, simplifying the manufacturing of each individual component while collectively providing comprehensive bidirectional error moment absorption capability.
Solution Approach 2:
The error moment absorption is extended from a single-point structure to a distributed multi-point structure by positioning dampers at both upper and lower ends of the base bracket. This spatial distribution enables the system to absorb complex bidirectional error moments effectively while maintaining simple individual component designs.
2Device complexity
If error moment absorption structure is formed on top of weight sensor with single damping structure, then the structure is simplified, but Z-direction moment cannot be absorbed alongside X or Y-directional moments
Solution Approach 1:
The single damping structure is segmented into multiple independent damping elements (upper and lower dampers) positioned at different locations on the base bracket. Each damper is designed with simple geometry for easy manufacturing, while the collective arrangement provides comprehensive bidirectional error moment absorption including Z-direction moments.
Solution Approach 2:
The upper and lower dampers are designed with universal functionality to absorb error moments in multiple directions (X, Y, and Z directions). Each damper can handle both vertical and horizontal error moments, making the structure versatile for complex loading conditions while maintaining individual component simplicity.
3Device complexity
If load concentrates on single damper in existing structure, then the damping structure is simple, but the durability of the system is reduced
Solution Approach 1:
The load-bearing function is segmented from a single damper into multiple dampers (upper and lower dampers) distributed on the base bracket. This segmentation distributes the concentrated load across multiple components, reducing stress on each individual damper and improving overall system durability while maintaining structural simplicity.
Solution Approach 2:
The load distribution is transitioned from a single-point concentration to a distributed spatial arrangement by positioning dampers at both upper and lower ends of the base bracket. This dimensional distribution of load paths reduces peak stresses and improves durability without significantly increasing structural complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The improved design enhances error moment absorption performance, increases the absorption dimension, and simplifies the manufacturing process, thereby improving passenger safety and system durability.
Implementation Method 1
an upper damper and a lower damper contacting the top and the bottom of the base bracket, respectively to absorb an error moment
Data Source
AI summary
Disclosed is a passenger identification device including: a weight sensor assembled to a seat of a vehicle, sensing a weight of a passenger and including a stud unit that protrudes upward; a base bracket positioned on the top of the weight sensor and mediating mounting of the weight sensor; an upper damper and a lower damper contacting the top and the bottom of the base bracket, respectively to absorb an error moment; and an upper sleeve and a lower sleeve positioned on the top of the upper damper and the bottom of the lower damper, respectively and used to fix the position of the damper and protect the damper.