Wireless Bearing Load Sensing With Temperature-Corrected Measurement
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Solution Overview
Problem
Existing bearing load measurement solutions face challenges such as complex and costly designs due to changing load directions, temperature-induced errors with eddy current sensors, and restrictions with pin-type sensors regarding power supply and signal transmission.
Innovation Solution
A wireless sensing device for bearings that includes a sensing body with a press-fit mounting mechanism, integrating a pressure sensor for load measurement, a temperature sensor for correction, a wireless communication module for real-time data transmission, and a wireless power supply module for energy reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If strain gauges are used to measure bearing load, then load measurement is achieved, but multiple strain gauges are required due to changing load directions, making the design complicated and costly
Solution Approach 1:
The patent combines multiple strain gauges into a single integrated sensing body (load sensor) that can measure loads in multiple directions simultaneously. This single sensor integrates the functionality of what would otherwise require multiple separate strain gauges, simplifying the design while maintaining measurement precision for bearings subjected to changing load directions.
Solution Approach 2:
The sensing body is designed as a multi-functional component that not only measures load in various directions but also serves as a mounting structure within the bearing. This universal component replaces multiple specialized sensors and simplifies the overall system design while maintaining the ability to measure complex loading conditions.
2Measurement precision
If eddy current sensors are used to detect displacement change, then displacement measurement is achieved, but the measurement is seriously affected by temperature, causing measurement errors
Solution Approach 1:
The patent replaces the temperature-sensitive eddy current sensor with a strain gauge-based sensing body that directly measures mechanical load and displacement. This mechanical measurement approach is less sensitive to temperature variations compared to electromagnetic methods, thereby reducing measurement errors while maintaining the ability to detect displacement changes caused by load.
3Measurement precision
If pin-type load sensors are used for real-time measurement, then load measurement is achieved, but power supply and signal transmission impose restrictions requiring complex electrical conductor layouts
Solution Approach 1:
The patent integrates the sensing body directly into the bearing structure through press-fit mounting, combining the load sensing function with the bearing component itself. This integration eliminates the need for separate power supply and signal transmission wiring that would be required for external pin-type sensors, as the sensing body becomes an inherent part of the bearing assembly.
Solution Approach 2:
The sensing body serves itself by being self-powered and self-signal-ing through its integration into the bearing structure. The load sensor utilizes the bearing's own structural elements for mounting and signal transmission, eliminating external wiring requirements and simplifying the overall system while enabling real-time measurement.
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 provides accurate, real-time bearing load measurements with improved temperature correction, simplifies the design by eliminating the need for multiple sensors and complex wiring, and reduces costs and maintenance through wireless operation and integration of components.
Implementation Method 1
The sensing measurement module comprises a pressure sensor for measuring the load of the bearing
Implementation Method 2
a temperature sensor for measuring the temperature of the sensing device, wherein the measured load is corrected by the measured temperature
Implementation Method 3
a wireless power supply module
Data Source
AI summary
A sensing device for a bearing and a bearing component. The sensing device includes a sensing body for mounting into the bearing by a press fit. The sensing body is provided with: a sensing measurement module having a pressure sensor for measuring the load of the bearing and a temperature sensor for measuring the temperature of the sensing device, and the measured load is corrected using the measured temperature; a wireless communication module used for wirelessly transmitting bearing information from the sensing measurement module; and a wireless power supply module used for supplying power for the sensing measurement module and the wireless communication module. The bearing component includes a bearing and the sensing device.