Construction method of heat flow static calibration

A construction method and heat flow technology, applied in the field of sensor calibration, can solve the problems of untraceable heat flow and large discrete errors, and achieve the effects of improving static calibration accuracy, small impact, and reducing discrete errors
CN112362196AActive Publication Date: 2021-02-12INST OF MECHANICS - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF MECHANICS - CHINESE ACAD OF SCI
Publication Date
2021-02-12

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Abstract

The invention discloses a construction method of heat flow static calibration. The method comprises the following steps: constructing a high-temperature area and a low-temperature area in a vacuum system, forming a length-controllable heat flow state bridge between the high-temperature area and the low-temperature area, and carrying out static long-time heat flow loading on the heat flow state bridge; obtaining multiple groups of heat flux densities qw by controlling temperature gradient parameters of the high-temperature area and the low-temperature area of the heat flux state bridge and length parameters of the heat flux state bridge, obtaining a tracing temperature delta Te according to the measured output voltage of the heat flux state bridge, and obtaining a tracing heat flux densityqwe according to the tracing temperature delta Te; and according to the multiple groups of heat flux densities qw and the corresponding tracing heat flux densities qwe, constructing a calibration parameter epsilon=qw-qwe / qw*100% of the heat flux sensor.
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Description

technical field

[0001] The invention relates to the technical field of sensor calibration, in particular to a construction method for heat flow static calibration. Background technique

[0002] The coaxial thermocouple transient heat flow sensor is an experimental component that uses the Seebeck effect of different electrode materials to form an electromotive force under different temperature gradients and measure it, and then inverts the temperature and heat flow. It is mainly used in aerospace hypersonic aircraft aerodynamics Experiments, hypersonic flow related experiments, etc., have the characteristics of fast response, large measurement range, high precision, and strong robustness.

[0003] At present, the calibration of heat flow sensors is generally dynamic calibration. The sensor response is investigated by applying pulsed heat flow loads, including laser loading methods, droplet loading methods, shock tube calibration methods, etc., forming a short-term heat flow l...

Claims

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