Multi-axis Sensor Using Capacitance and Resistance Detection
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Solution Overview
Problem
Existing external force sensors are costly due to complex manufacturing processes and require multiple electrodes to measure forces along multiple axes, increasing complexity and production costs, while precision sensors are unaffordable for quality improvement in products.
Innovation Solution
A hybrid type multi-axis sensor with a pair of electrodes positioned to face each other, embedded in a dielectric elasticity member, which measures changes in capacitance and resistance values to detect external forces along multiple axes, distinguishing between horizontal and vertical components using a processor for calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a plurality of electrodes is used to measure force along multiple axes, then measurement capability is improved, but device complexity and production cost increase
Solution Approach 1:
A single electrode structure performs multiple measurement functions by detecting both capacitance changes (for vertical force component) and resistance changes (for horizontal force component), eliminating the need for separate electrodes for each axis measurement
Solution Approach 2:
The patent combines capacitance sensing and resistance sensing functions into a single integrated electrode system, where the same electrode structure provides both measurement modalities through different physical principles
2Measurement precision
If precision sensors are used to improve product quality, then measurement accuracy is improved, but production cost increases
Solution Approach 1:
The patent replaces complex mechanical sensor structures with an electrical field-based sensing system that uses capacitance and resistance measurements, simplifying manufacturing while maintaining precision
Solution Approach 2:
The invention measures force by detecting changes in electrical parameters (capacitance and resistance values) rather than using complex mechanical measurement systems, enabling precise measurement at lower production costs
3Ease of manufacture
If a simple sensor structure is used, then manufacturing cost is reduced, but measurement capability is limited
Solution Approach 1:
The patent extracts multiple measurement dimensions (vertical and horizontal force components) from a single simple electrode structure by monitoring different electrical parameters (capacitance for vertical, resistance for horizontal), achieving multi-axis measurement capability without complex hardware
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 sensor achieves precise measurement of external force components in a simple structure with reduced production costs by using a pair of electrodes to measure forces in 2-axe directions, enhancing the competitiveness and affordability of force sensors.
Implementation Method 1
configured to detect a change of capacitance value between the pair of electrodes
Implementation Method 2
configured to detect a change of capacitance value between the pair of electrodes and a change of resistance value of the elasticity member
Data Source
AI summary
Provided herein is a multi-axis sensor including: a pair of electrodes positioned such that at least partial areas thereof face each other; an elasticity member having one of the pair of electrodes installed in its upper portion and another of the pair of electrodes installed in a lower portion; and a sensor unit electrically connected with the pair of electrodes, and configured to detect a change of capacitance value between the pair of electrodes and a change of resistance value of the elasticity member.