Palladium alloy hydrogen sensor and temperature compensation method thereof

By calibrating the palladium alloy hydrogen sensor at different temperatures and hydrogen concentrations, the fitting equation is generated for dynamic compensation, which solves the problem of high power consumption of traditional hydrogen sensors and realizes low-power hydrogen concentration measurement.

CN117705893BActive Publication Date: 2025-03-18SUZHOU QINTEC ELECTRIC LTD
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Patent Information

Application Number
CN202311720313.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-12-14
Publication Date
2025-03-18
Estimated Expiration
2043-12-14

AI Technical Summary

Technical Problem

Traditional palladium-nickel alloy thin-film hydrogen sensors need to consume high power when measuring hydrogen concentration, and cannot be suitable for ultra-low power hydrogen detection, nor can they meet the specific requirements of the commonly used two-wire 4mA to 20mA transmitters in the industry.

Method used

By calibrating the palladium alloy hydrogen sensor at the reference temperature and different concentrations of hydrogen, standard fit equations and temperature compensation equations are generated. These equations are used to perform dynamic compensation in the measurement stage, and the hydrogen varistor compensation value is calculated, and the hydrogen concentration value is finally obtained.

Benefits of technology

It realizes accurate measurement of hydrogen concentration without heating and temperature control, reduces the total power consumption of the sensor, and meets the low-power consumption requirements commonly used in the industry.

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Abstract

The present invention discloses a palladium alloy hydrogen sensor and a temperature compensation method thereof, wherein the temperature compensation method comprises: introducing N different concentrations of hydrogen into the sensor at a reference temperature, fitting the obtained N groups of hydrogen-sensitive resistance values ​​and hydrogen concentrations, and generating a standard fitting equation; introducing nitrogen, lower concentration hydrogen, and higher concentration hydrogen into the sensor at M different temperatures, and calculating the difference between the hydrogen-sensitive resistance value when different concentrations of hydrogen are introduced at different temperatures and the hydrogen-sensitive resistance value at the reference temperature, generating the first, second, and third fitting equations; obtaining a dynamic compensation equation using the measured real-time temperature and the first, second, and third fitting equations, and then calculating the hydrogen-sensitive resistance compensation value; and calculating the final hydrogen concentration according to the hydrogen-sensitive resistance compensation value and the standard fitting equation. The present invention does not need to heat the sensor when measuring the hydrogen concentration, thereby reducing the power consumption of the sensor when it is used.
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