A heat flow static calibration device

Abstract

The invention discloses a heat flow static calibration device, which comprises a high-temperature zone and a low-temperature zone for temperature detection by a target sensor in a vacuum state, and a convective heat transfer state that generates a uniform temperature gradient between the high-temperature zone and the low-temperature zone The vacuum steady-state measuring device and the high-temperature zone and low-temperature zone used to connect the vacuum steady-state measuring device, the calibration metering device for tracing the heat flow source under the convective heat transfer state, and the electromotive force data generated under the convective heat transfer state, And through the electromotive force data inversion of the heat flow output data after tracing the source, the data acquisition device that obtains the linear relationship between the heat flow output data and the target sensor temperature output data; through the temperature refinement and long-term measurement of the controllable distance, the existing The dynamic calibration of the sensor and the problem that the heat flow cannot be traced reduce the discrete error in the detection and calibration process, and effectively improve the static calibration accuracy of the coaxial thermocouple transient heat flow sensor.

Description

technical field [0001] The invention relates to the technical field of sensor calibration, in particular to a heat flow static calibration device. 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 loading process, a...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a heat flow static calibration device to solve the technical problems in the prior art that the heat flow cannot be traced and the discrete error is large under short-term dynamic calibration.

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