Temperature measurement method and temperature measurement system based on platinum resistor temperature sensor
The invention provides a temperature measurement method and system based on a platinum resistor temperature sensor, and the method comprises the steps: generating a variable-frequency square wave signal, outputting a modulation excitation current signal at a high-level stage of the square wave signa...
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Main Authors | , , , |
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Format | Patent |
Language | Chinese English |
Published |
18.04.2023
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Subjects | |
Online Access | Get full text |
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Summary: | The invention provides a temperature measurement method and system based on a platinum resistor temperature sensor, and the method comprises the steps: generating a variable-frequency square wave signal, outputting a modulation excitation current signal at a high-level stage of the square wave signal, exciting the platinum resistor temperature sensor through the modulation excitation current signal, and measuring the temperature of the platinum resistor temperature sensor. A digital voltage signal in a time domain is converted into a power signal in a frequency domain through an FFT algorithm, a direct-current component is extracted, a fundamental component of an excitation current signal is modulated, a resistance value of the platinum resistor temperature sensor is obtained according to the direct-current component and the fundamental component, and then a temperature value of a measured point is calculated. The variable-frequency square wave modulation current source is used for exciting the platinum resis |
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Bibliography: | Application Number: CN202310092746 |