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High-sensitivity quick response heat flux sensor

A heat flow sensor and fast response technology, applied in the field of sensor measurement, can solve the problem that the heat flow sensor cannot quickly respond to small heat flow, etc., and achieve the effects of convenient structure, fast response speed and convenient installation.

Active Publication Date: 2017-05-24
BEIJING RES INST OF TELEMETRY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a high-sensitivity fast-response heat flow sensor, and solve the problem that the heat flow sensor cannot quickly respond to tiny heat flow

Method used

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  • High-sensitivity quick response heat flux sensor

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Embodiment Construction

[0038] see figure 1 , the heat flow sensor uses very thin (less than 0.03mm) constantan foil to make zigzag lines (2) of specified size, and copper-plates the prepared lines (2) according to regular divisions, and then the lines formed on the lines The "copper-constantan" and "constantan-copper" thermocouple junctions are regularly arranged on both sides of the surface of the thin film thermal resistance material, forming a thermopile that can sense the temperature difference on both sides of the thermal resistance surface, thereby measuring the incident heat flow.

[0039] The key process of the present invention is to make constantan foil copper-plated lines, and the specific process can be realized by two kinds of process routes, the first route is as follows: figure 2 , including the following steps:

[0040] (1) Design the line graph according to the sensitivity index of the sensor, and the sensitivity affects the number n of twists and turns of the line on the equal ar...

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Abstract

The invention relates to a high-sensitivity quick response heat flux sensor. A curved line is manufactured by using a constantan foil piece, and copper plating is performed on the line through the electroplating technology according to the certain rules. When incident heat flux along the normal direction of sensor heat resistance material appears, the temperature difference generates on the upper and lower planes of the heat resistance material, differential thermocouples output signals and the thermo-electric pile in the sensor is equivalent to accumulation of the output of all the included differential thermocouples so that the sensitivity of the sensor can be enhanced, and the sensor can also quickly respond because of low thickness of the heat resistance material when the incident heat flux is small. Compared with the conventional circular foil heat flux sensor, the high-sensitivity quick response heat flux sensor has the following advantages of being small in the sensor size and low in weight; the sensor is piece-shaped, quick in response and convenient to install and can be directly fit on the measured surface; the sensor has high sensitivity and can cover small range heat flux which cannot be measured by the circular foil heat flux sensor; and the sensor is simple in technology and convenient for batch production.

Description

technical field [0001] The invention relates to a heat flow sensor with high sensitivity and fast response, which belongs to the field of sensor measurement. 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. At present, the relatively mature heat flow sensor is the round foil heat flow sensor (Gardon meter), but the round foil heat flow sensor is mostly used to measure large heat flow, and the sensitivity of the sensor is difficult to increase. When used to measure small heat flow, the output signal of the sensor is very weak , is difficult to detect, so a sensor with high sensitivity that can be used to measure the small heat flux is needed. The heat flow sensor in the present invention is a thermal resistance heat flow sensor, which uses the measurement principle of thermopile to measure heat flow. The thermopile can output a rel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K17/06
CPCG01K17/06
Inventor 李俊王丰方静刘建华彭泳卿宋晓慧
Owner BEIJING RES INST OF TELEMETRY
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