Displacement Detector Offset Compensation for Temperature Drift
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Solution Overview
Problem
Existing displacement detector devices face detection errors due to variations in the temperature characteristics of multiple magnetic sensors, which are not adequately addressed in previous technologies.
Innovation Solution
The device includes multiple magnetic sensors arranged linearly, with a movable magnet and a controller, where offset values are set for each sensor at different temperatures to correct for temperature-induced sensitivity changes, ensuring accurate detection by pairing sensors with opposite polarity detection values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple magnetic sensors are used to detect displacement, then measurement precision is improved, but detection errors caused by temperature variations increase
Solution Approach 1:
The patent applies parameter changes by adjusting the offset values of magnetic sensors based on temperature conditions. Different offset values are selected for sensors at different temperatures, which compensates for temperature-induced sensitivity variations and maintains measurement accuracy across varying thermal environments
Solution Approach 2:
The system incorporates feedback mechanisms where the controller monitors temperature and dynamically adjusts sensor offset values accordingly. This feedback loop ensures that temperature variations are continuously compensated for, maintaining reliable displacement measurements under changing thermal conditions
2Reliability
If offset values are adjusted for each sensor at different temperatures, then temperature characteristic variations are reduced, but device complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-establishing multiple offset values for each magnetic sensor corresponding to different temperature conditions. These offset values are prepared in advance and stored in the controller, eliminating the need for real-time complex calculations and reducing operational complexity while maintaining temperature compensation effectiveness
Solution Approach 2:
The system manages complexity by changing discrete parameter values (offset values) based on temperature ranges rather than requiring continuous adjustment. This approach simplifies the control logic while effectively compensating for temperature-induced sensor drift
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 configuration significantly reduces or prevents detection errors caused by temperature variations, maintaining precision in measuring liquid surface levels or other displacements across varying temperatures.
Implementation Method 1
a first magnetic sensor H4 and a second magnetic sensor H6... values of an applied magnetic field detected by the first magnetic sensor H4 and that detected by the second magnetic sensor H6 are opposite in polarity
Data Source
AI summary
In multiple magnetic sensors, for a correlation function between a magnetic field applied from a magnet and a value of the magnetic field detected by the magnetic sensor at a first temperature, the value detected by the magnetic sensor when the magnetic field applied from the magnet is 0 is set to be a first offset value. For a correlation function between a magnetic field applied from the magnet and a value of the magnetic field detected by the magnetic sensor at a second temperature, the value detected by the magnetic sensor when the magnetic field applied from the magnet is 0 is set to be a second offset value. The second temperature is higher than the first temperature. A values of applied magnetic fields detected by first and second magnetic sensors are opposite in polarity.