Tire Strain Load Detection With Pressure and Temperature Compensation
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Solution Overview
Problem
Existing tire strain sensors face reduced detection accuracy due to influences from physical quantities other than strain, such as air pressure, temperature, and vehicle speed, which affect the measurement of load on a tire.
Innovation Solution
A strain amount detection device calculates the load on a tire by using data that describes the relationship between measured strain, tire air pressure, vehicle speed, and tire temperature, allowing for the mitigation of these influences and improved measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a strain sensor is used to detect tire load, then the detection of physical quantities (strain, vehicle speed, temperature, air pressure) is achieved, but the detection accuracy of strain is reduced due to interference from other physical quantities
Solution Approach 1:
The patent segments the detection function by using multiple independent sensors (strain sensor, air pressure sensor, temperature sensor, vehicle speed sensor) to detect different physical quantities separately. This allows the system to process and compensate for each physical quantity's influence on strain detection individually, thereby improving overall measurement precision while maintaining versatile detection capability.
Solution Approach 2:
The patent implements feedback by using detected values from air pressure, temperature, and vehicle speed sensors to compensate for their influences on the strain sensor output. The control unit continuously adjusts the strain detection results based on feedback from these auxiliary sensors, effectively eliminating interference and improving measurement accuracy.
2Measurement precision
If only air pressure correction is applied to strain sensor data, then partial improvement in load detection accuracy is achieved, but detection accuracy remains insufficient due to uncorrected influences from other physical quantities
Solution Approach 1:
The patent merges multiple correction mechanisms into a unified system. It combines air pressure correction, temperature correction, and vehicle speed correction into a single comprehensive load detection algorithm. By integrating these multiple correction factors, the system achieves complete compensation for all major interference sources, ensuring both high accuracy and reliability in load detection.
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 device effectively mitigates the impact of non-strain physical quantities on tire load measurement, enhancing the accuracy of strain sensor readings and providing a more reliable detection of tire loads.
Implementation Method 1
By detecting strain deformation of a tire, a tire strain sensor can detect a load acting on the tire and wear of the tire
Data Source
AI summary
An object of the present invention is to mitigate an influence of a physical quantity other than strain of a tire on a measurement result of a strain sensor and to improve measurement accuracy of the strain sensor. A strain amount detection device according to the present invention calculates an estimation value of a load applied to a tire by using data describing a relationship among an actually measured strain amount, a tire air pressure, a vehicle speed, a tire temperature, and a tire load.