Method for measuring resistance-temperature relation of NTC temperature sensor

Abstract

The invention belongs to the technical field of sensor precision measurement, and particularly provides a method for measuring the resistance-temperature relation of an NTC temperature sensor. The method comprises the steps that a plurality of standard samples are placed, a constant temperature medium controller is controlled to output constant temperature environments at all temperature points ina temperature point set, and standard resistance values corresponding to all the standard samples at the same temperature point are collected and stored; then a to-be-measured sample and the standardsamples are bound together and placed into the constant temperature environments output by the constant temperature medium controller, and according to the set test temperature points, the actually-measured resistance values of all the standard samples are compared with the corresponding standard resistance values; when that the actually-measured temperature values are stable and accurate is determined, the resistance value of the to-be-measured sample is collected, and a resistance-temperature relation curve of the to-be-measured sample is output. The to-be-measured sample is scanned withina short time, data is stored in an Excel table, and the operation process of personnel is saved. Whether the temperature is stable or not is judged through fixed logic, and therefore the test data keeps good consistency.

Description

technical field [0001] The invention belongs to the technical field of sensor precision measurement, in particular to a method for measuring the resistance-temperature relationship of an NTC temperature sensor. Background technique [0002] The R-T characteristic of the NTC sensor is a very important key characteristic parameter, which directly reflects the performance of the NTC sensor and can be used to determine the applicable range and sensitivity of the sensor. The results must be tested with high precision. [0003] The old test method used to be to manually adjust the temperature point according to the resistance value of the standard sample, and then wait for the human judgment to stabilize the temperature, then switch the test lead to the sample to be tested to obtain the resistance value and record it. Each temperature point and each single sample test has high repeatability and singleness. According to incomplete statistics, a total of 1,467 temperature points we...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to overcome the problem of low efficiency of NTC sensor precision measurement in the prior art

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