Load Sensor Strain Element Placement for Stress Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing load sensors face challenges in maintaining detection accuracy when their size is reduced, particularly due to stress applied to input-output terminals, which can degrade the performance of strain detecting elements when detecting loads on complex or small-sized detection objects.
Innovation Solution
A load sensor design featuring a base substrate with multiple fixing portions and strategically placed strain detecting elements and input-output terminals, where the strain detection portion is between the fixing portions, and the input-output terminals are opposite the strain detecting elements, allowing for accurate load detection without stress interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of the sensor plate is decreased to reduce the load sensor size, then the distance between the input-output terminal and the strain detecting elements becomes insufficient, but this causes stress from wiring work to degrade detection accuracy
Solution Approach 1:
The patent positions the input-output terminal and strain detecting elements in opposite regions across the sensor plate, utilizing spatial separation in two dimensions. This dimensional arrangement ensures sufficient distance between components even when the overall sensor size is reduced, preventing stress interference while maintaining compact dimensions.
Solution Approach 2:
The patent creates distinct functional regions on the sensor plate: one region for the input-output terminal and another opposite region for the strain detecting elements. This local differentiation ensures that each component is positioned in an optimal location that minimizes stress interference while maintaining adequate spacing, thus preserving detection accuracy in a compact sensor design.
2Measurement precision
If the distance between the input-output terminal and the strain detecting elements is increased to prevent stress interference, then detection accuracy is maintained, but the overall sensor size increases
Solution Approach 1:
Instead of increasing distance in a linear fashion which would expand sensor size, the patent utilizes two-dimensional spatial arrangement by positioning components in opposite regions across the plate. This allows adequate separation distance to be achieved within a compact overall footprint, maintaining detection accuracy without proportionally increasing sensor dimensions.
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
This configuration ensures high detection accuracy while minimizing the sensor size, preventing degradation from stress on the input-output terminals and allowing for precise load measurement on objects with complex shapes or sizes.
Implementation Method 1
the base substrate is elastically deformed when a load is applied thereto
Implementation Method 2
a plurality of strain detecting elements (strain gauges) fixed to a surface of the sensor plate
Data Source
AI summary
A load sensor includes a base substrate having two holes as two fixing portions to a frame member as a detection object, a pair of strain detecting elements provided on a surface of the base substrate, and input-output terminals provided on the surface of the base substrate. The strain detecting elements are arranged in a region that is between the holes and is opposite the input-output terminals with respect to at least one of the holes.