Load Detection Device With Spaced Protrusions For Horizontal Force Sensing
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Solution Overview
Problem
Load detection devices with protrusions of a rectangular sectional shape fail to detect loads in the horizontal direction due to the top end of the protrusions coming into contact with adjacent protrusions without gaps, preventing horizontal movement and detection.
Innovation Solution
A load detection device design featuring an array substrate with array electrodes and a sensor layer, where the elastic deformation part includes protrusions with a rectangular sectional shape that are spaced apart to allow for horizontal movement and detection, utilizing a grid-shaped elastic deformation part with intersecting walls to ensure overlap with multiple electrodes and maintain separation from adjacent protrusions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If protrusions with rectangular sectional shape are disposed adjacently without gaps, then the structure is compact and manufacturing is simplified, but the top end of the protrusion cannot move in the horizontal direction when load is applied, preventing horizontal load detection
Solution Approach 1:
The elastic deformation part is segmented into multiple independent protrusions that are spaced apart from each other. This segmentation allows each protrusion to independently deform under horizontal load without being constrained by adjacent protrusions, enabling horizontal load detection while maintaining structural simplicity
Solution Approach 2:
The protrusions are designed with rectangular cross-sections and specific dimensional relationships (width smaller than spacing between protrusions). This local geometric configuration allows horizontal movement at the top end of each protrusion when load is applied, while maintaining overall structural compactness and ease of manufacture
2Measurement precision
If protrusions are spaced apart to allow horizontal movement, then horizontal load detection is enabled, but the device complexity increases
Solution Approach 1:
The elastic deformation part is divided into multiple discrete protrusions with uniform spacing, creating a modular structure that enables horizontal load detection. The segmented design allows each protrusion to function independently while maintaining overall structural simplicity through repetition of the same geometric pattern
Solution Approach 2:
The spaced protrusion structure serves multiple functions: it enables horizontal load detection through shear deformation, maintains vertical load detection capability, and provides a compact geometry. This multi-functionality reduces the need for additional components, thereby limiting the increase in device 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
Enables accurate detection of loads in the horizontal direction by generating shear stress and varying the force distribution across the detection surface, enhancing sensitivity and preventing contact issues between protrusions, thus allowing for effective horizontal load detection.
Implementation Method 1
an elastic deformation part disposed on one surface of the force detector... the elastic deformation part includes a plurality of protrusions having a rectangular sectional shape
Implementation Method 2
When a load in the horizontal direction is applied to the top end of the protrusion, the top end of the protrusion moves in the direction of the force. As a result, shear stress is generated in the protrusion.
Data Source
AI summary
A load detection device includes a force detector and an elastic deformation part disposed in order in a first direction. The force detector includes an array substrate provided with a plurality of array electrodes on a first surface facing the first direction, and a sensor layer facing the array electrodes.