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

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

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Problems solved by technology

[0004] The purpose of the present invention is to provide a construction method for heat flow static calibration 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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  • Construction method of heat flow static calibration
  • Construction method of heat flow static calibration
  • Construction method of heat flow static calibration

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Embodiment Construction

[0036] 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.

[0037] Such as Figure 4 As shown, the present invention provides a construction method for heat flow static calibration, including steps,

[0038] S100. Construct a high temperature zone and a low temperature zone in the vacuum system, and form a heat flow state bridge with a controllable length between the high temperature zone and the low temperature zone, and perform static long-term heat flow loading on the heat flow state bridge;

[0039] S200. Obtain m...

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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.

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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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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