Resistance Strain Sheet with Symmetric Acute-Angle Wires for Shear Force Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric skateboards have poor operation performance and user experience due to insensitive force sensors that fail to accurately detect user foot pressure for acceleration, deceleration, and braking functions.
Innovation Solution
A resistance strain sheet with symmetrically arranged resistance wires at an acute angle is integrated into a force sensor, forming a Wheatstone Bridge to accurately measure shear strain and convert it into a voltage signal, enhancing the detection of foot pressure and improving intelligent operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing force sensors are applied to the electric skateboard, then the structure is simple and easy to manufacture, but the sensitivity of detecting the stampede force is poor
Solution Approach 1:
The resistance wire is divided into multiple segments arranged in specific patterns (first resistance wire group in first direction, second resistance wire group in second direction). This segmentation allows the sensor to detect forces in multiple directions independently, improving measurement precision without requiring a completely new sensor design
Solution Approach 2:
Different regions of the strain sheet have different resistance wire arrangements optimized for detecting forces in specific directions. The first resistance wire group is optimized for forces in the first direction, while the second resistance wire group is optimized for forces in the second direction, creating local quality variations that enhance overall detection sensitivity
2Extent of automation
If remote control device operation is used for acceleration, deceleration and braking, then the device complexity is low, but the degree of intelligent manipulation is poor
Solution Approach 1:
The electric skateboard system uses force sensors to automatically detect user stampede forces and autonomously control acceleration, deceleration, and braking functions. The system serves itself by converting mechanical force input directly into control commands without requiring remote control intervention, thereby achieving intelligent manipulation
3Measurement precision
If the resistance wires are arranged parallel to the symmetry axis, then the manufacturing is simple, but the detection of shear strain is insufficient
Solution Approach 1:
The resistance wires are arranged at asymmetric angles relative to the symmetry axis of the strain sheet. Specifically, the first resistance wire group is arranged in a first direction while the second resistance wire group is arranged in a second direction, creating an asymmetric pattern that enhances sensitivity to shear strain components
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 solution allows for precise measurement of foot pressure, facilitating better acceleration, deceleration, and braking control, thereby improving the user experience and intelligent operation of electric skateboards.
Implementation Method 1
a resistance wire, the strain sheet body having a symmetry axis, a plurality of the resistance wire being provided
Implementation Method 2
the plurality of strain detection regions in one-to-one correspondence to form a Wheatstone Bridge, the Wheatstone Bridge being configured to convert an variation of a resistance value generated by the resistance strain sheet into a voltage value
Data Source
AI summary
An embodiment of the present disclosure provides a resistance strain sheet, a sensing assembly, a force sensor and a skateboard, wherein the resistance strain sheet includes: a strain sheet body; and a resistance wire, the strain sheet body having an symmetry axis, a plurality of resistance wires being provided, and the plurality of resistance wires being divided into two groups, the two groups of resistance wires are electrically connected to each other and symmetrically arranged on both sides of the symmetry axis, and each of the plurality of resistance wire being arranged at an acute angle with the symmetry axis.