Force Sensing Device with Strain Amplification and Multi-Directional Detection
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Solution Overview
Problem
Existing pressure sensing technologies are complicated in structure and mounting, have low sensitivity, and can only accurately detect deformation in one-dimensional direction, leading to reliability issues.
Innovation Solution
A device with a rigid structure and four force sensors arranged in a strain amplification area, forming different bridge circuits connected to a signal processing circuit to detect deformation in multiple directions, providing an integrated structure for easy mounting and high sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional pressure sensing technologies are used, then they can detect deformation to a certain extent, but the structure and mounting become complicated
Solution Approach 1:
The patent combines multiple force sensors (at least four sensors) into a single integrated sensing element that detects multi-directional forces simultaneously. The force sensors are arranged in a specific pattern on the rigid structure, allowing simultaneous measurement of forces in different directions through a unified device architecture, thereby simplifying the overall structure and mounting process while maintaining measurement precision.
Solution Approach 2:
The rigid structure with strategically placed force sensors serves multiple functions: it provides mechanical support, transmits forces to the sensors, and enables detection in multiple directions (X, Y, and Z axes). This multi-functional design eliminates the need for separate sensing elements for different directions, reducing structural complexity while maintaining comprehensive measurement capability.
2Measurement precision
If traditional pressure sensing technologies are used, then they can detect deformation, but sensitivity becomes low
Solution Approach 1:
The patent employs at least four force sensors strategically positioned at specific locations on the rigid structure to detect local deformations in different directions. Each sensor is optimized for detecting forces in its specific directional orientation, with the sensors arranged to cover X, Y, and Z axes. This localized sensing approach enhances sensitivity by ensuring that deformation in any direction is captured by the appropriately positioned sensor with high detection capability.
Solution Approach 2:
The patent extends detection from traditional one-dimensional pressure sensing to three-dimensional force detection by arranging force sensors to measure forces in X, Y, and Z directions simultaneously. This multi-dimensional sensing approach increases sensitivity by capturing deformation components that would be missed in single-direction sensing, providing comprehensive measurement of the force vector in all spatial directions.
3Measurement precision
If traditional pressure sensing technologies are used, then they can detect deformation in one dimension, but accuracy in multi-dimensional direction is limited
Solution Approach 1:
The rigid structure with strategically placed force sensors serves multiple functions: it provides mechanical support, transmits forces to the sensors, and enables detection in multiple directions (X, Y, and Z axes). This multi-functional design eliminates the need for separate sensing elements for different directions, reducing structural complexity while maintaining comprehensive measurement capability.
Solution Approach 2:
The patent extends detection from traditional one-dimensional pressure sensing to three-dimensional force detection by arranging force sensors to measure forces in X, Y, and Z directions simultaneously. This multi-dimensional sensing approach increases sensitivity by capturing deformation components that would be missed in single-direction sensing, providing comprehensive measurement of the force vector in all spatial directions.
4Ease of manufacture
If traditional pressure sensing technologies are used, then they can be implemented, but false touch and temperature/humidity drift occur
Solution Approach 1:
The patent employs a compensation mechanism that uses the output signals from the force sensors to detect and compensate for temperature and humidity effects. By monitoring the responses of the force sensors to environmental changes and comparing them with expected values, the system can identify and correct for drift caused by temperature and humidity variations, thereby improving reliability and reducing false readings.
Solution Approach 2:
The patent utilizes the temperature and humidity coefficients of the force sensors to compensate for environmental effects. By measuring the actual temperature and humidity conditions and comparing them with reference values, the system can calculate compensation factors that adjust the sensor readings to compensate for environmental drift, thereby maintaining accuracy and reducing false touch effects.
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 solution enables sensitive detection of small deformations in multi-dimensional directions, ensuring high sensitivity, reliability, and accuracy with low cost and simple circuitry, while avoiding false touch and temperature/humidity drift.
Implementation Method 1
These technologies use different types of sensors, combined with specific structures and circuits to detect the deformation of the object to be measured
Implementation Method 2
pressure capacitance technology
Implementation Method 3
pressure inductance technology
Implementation Method 4
a rigid structure, configured for fitting with an object to be measured and deforming with the object to be measured
Data Source
AI summary
A device of force sensing, which includes a rigid structure and force sensors. The rigid structure includes rigid blocks spaced apart, and a strain amplification area is formed between two adjacent rigid blocks, every two force sensors in four force sensors are used as a group, and two groups of the force sensors are selectively arranged corresponding to two of the mounting surfaces of the strain amplification area, the four force sensors are connected to form different bridge circuits.