Heat flow static calibration device

A calibration device and heat flow technology, which is applied in the field of sensor calibration, can solve the problems of large discrete errors and untraceable heat flow, and achieve the effects of small impact, improved static calibration accuracy, and reduced discrete errors

Active Publication Date: 2021-02-12
INST OF MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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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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Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] 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, and heat flow testing The object is often a hot plate or a large pipe, and the heat transfer process is also very complicated. In the traditional heat radiatio...

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Abstract

The invention discloses a heat flow static calibration device which comprises a vacuum steady-state measuring device for setting high-temperature area and a low-temperature area in a vacuum state fora target sensor to carry out temperature detection, and generating a convective heat transfer state with a uniform temperature gradient between the high-temperature area and the low-temperature area;a calibration metering device used for connecting the high-temperature area and the low-temperature area of the vacuum steady-state measuring device and carrying out heat flow tracing in the convective heat transfer state; and a data acquisition device used for collecting electromotive force data generated in the convective heat transfer state, and obtaining a linear relation between the heat flowoutput data and the temperature output data of the target sensor by inverting the traced heat flow output data through the electromotive force data. Through distance-controllable temperature refinement and long-time measurement, the problem that dynamic calibration and heat flow of an existing sensor cannot be traced back is avoided, discrete errors in the detection and calibration process are reduced, and the static calibration precision of the coaxial thermocouple transient heat flow sensor is effectively improved.

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...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K15/00G01K19/00
CPCG01K15/005G01K19/00
Inventor 韩桂来姜宗林
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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