Calibration device and calibration method for heat flow sensor

Abstract

A calibration device and calibration method for a heat flow sensor, the calibration device includes a cold plate and a hot plate capable of precise temperature control, the calibrated heat flow sensor and a standard heat flow sensor are placed between the cold and hot plates, and the sensor is calibrated by means of heat conduction calibration. The output of the standard sensor and the sensor under test is collected and calculated by a formula to obtain the sensitivity of the sensor under test. The invention can reduce the error introduced by the blackness coefficient of the black coating layer; avoid the error introduced by the response time difference; the calibration range is wide, and can meet the calibration requirements of heat flux density in different ranges; the equipment is simple, easy to implement, and the calibration cost is low; Calibrate multiple products at the same time to increase calibration efficiency.

Description

technical field [0001] The invention relates to a calibration device and a calibration method for a heat flow sensor, belonging to the field of sensor calibration. Background technique [0002] The heat flow sensor, also known as the heat flow meter, is used to measure the heat flux density and is an important measurement device for studying heat transfer. Calibration is to obtain the relationship between the output voltage of the sensor and the incident heat flow by some method. [0003] At present, the more mature heat flow calibration methods mostly use radiation calibration. The radiation heat flow source is used to provide heat flow to the heat flow sensor to be marked and the standard heat flow sensor at the same time, and the sensitivity of the heat flow sensor to be marked is obtained by comparing the output of the heat flow sensor. [0004] In order to prevent the calibration process from being disturbed by the external environment during radiation calibration, it ...

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Problems solved by technology

[0004] In order to prevent the calibration process from being disturbed by the external environment during radiation calibration, it is necessary to perform calibration work in a vacuum calibration area, which requires the calibration system to be equipped with vacuum chambers and other equipment, which increases the complexity of the equipment, and the sensitivity obtained by radiation calibration is used for convection Or conduction measurement needs to be converted for the blackness coefficient of the black layer of the heat flow sensor, which is more complicated to use

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