Magnetostrictive Position Detector Temperature Compensation
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Solution Overview
Problem
Magnetostrictive position detectors face inaccuracies in position measurements due to temperature changes, which are typically addressed using separate temperature sensors, increasing costs and complexity.
Innovation Solution
A system and method that compensates for temperature effects in magnetostrictive position detectors by determining thermal compensation coefficients through digital processing of signals, eliminating the need for built-in or external temperature sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature sensors are added to compensate for temperature effects, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The magnetostrictive position detector uses its own internal components (the magnetostrictive wire and electronic circuitry) to generate temperature compensation data. By measuring the electrical characteristics of its existing components at different temperatures, the system derives compensation coefficients without requiring external temperature sensors, thus achieving self-service for temperature compensation
Solution Approach 2:
The patent changes the measurement parameter from direct temperature measurement to electrical characteristic measurement. By monitoring how the electrical properties of the magnetostrictive wire and circuitry change with temperature, the system infers temperature effects and calculates compensation coefficients, thereby avoiding the need for dedicated temperature sensing hardware
2Measurement precision
If temperature sensors are added to compensate for temperature effects, then measurement precision is improved, but installation complexity and cost increase
Solution Approach 1:
The patent merges the temperature compensation function with the existing magnetostrictive position detection function. By using the same electronic circuitry and magnetostrictive wire for both position measurement and temperature effect characterization, the system eliminates the need for separate temperature sensor installation, wiring, and configuration, thereby simplifying installation while maintaining measurement accuracy
3Reliability
If built-in temperature sensors are used, then temperature compensation is achieved, but the detector structure becomes more complex
Solution Approach 1:
The patent makes the magnetostrictive wire and electronic circuitry serve multiple functions: position detection and temperature effect characterization. By extracting temperature compensation data from the electrical characteristics of these existing components, the system achieves temperature compensation capability without adding dedicated temperature sensing components, thus maintaining structural simplicity while improving reliability
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 approach reduces costs and installation complexity by providing accurate temperature compensation for position measurements without additional sensors, improving the functionality and cost-effectiveness of magnetostrictive position detectors in process control systems.
Implementation Method 1
a magnetostrictive wire, a magnetic field generator, and a float with a position marker affixed thereto
Data Source
AI summary
A system, method, and apparatus is provided for magnetostrictive position detectors to compensate fluid level measurements for temperature conditions associated with the process without the use of a built-in or external stand-alone temperature sensor. Also disclosed is an algorithm to compensate for temperature conditions associated with the process by determining thermal error coefficients for temperature compensation that are proportional to the process temperature via digital processing of the signals of the position detector.