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Thermopile principle based heat flux sensor

A heat flow sensor and thermopile technology, applied in the field of sensor measurement, can solve the problems of low sensor sensitivity and response speed, and achieve the effects of facilitating mass production, avoiding heat conduction, and fast response speed

Active Publication Date: 2019-01-04
BEIJING RES INST OF TELEMETRY +1
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AI Technical Summary

Problems solved by technology

The accuracy of surface heat flux measurement is greatly affected by the material and shape of the heat flux sensor. At the same time, the existing heat flux sensor generally only has one thermocouple, and the sensitivity and response speed of the sensor are not high.

Method used

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  • Thermopile principle based heat flux sensor

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Embodiment Construction

[0030] The present invention proposes a heat flow sensor based on the principle of thermopile, which selects the material of the measured part and conformal design, can greatly reduce the measurement error, and at the same time, the sensor has fast response speed and high sensitivity.

[0031] like figure 1 As shown, the heat flow sensor of the present invention has a cylindrical structure, and its cylindrical base 1 is processed by the material to be measured. There are several grooves 2, and the grooves are filled with special materials, and the shape of the measuring surface after filling is consistent with that before the grooves are opened. The depth of the groove 2 is directly proportional to the sensitivity of the heat flow sensor.

[0032] The difference in thermal conductivity between the special material and the material of the cylindrical base 1 is more than 10 times. If the thermal conductivity of the material of the cylindrical base 1 is low, the material with h...

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Abstract

The invention discloses a thermopile principle based heat flux sensor which is used for measuring surface heat flux. The heat flux sensor is of a cylindrical structure. A cylindrical base is machinedfrom a to-be-measured material. One end face of the cylindrical base is used as a measurement surface. The measurement surface is designed to be conformal to the surface shape of the to-be-measured material. The measurement surface is provided with a plurality of grooves. The grooves are filled with a special material. The filled measurement surface has the same shape with the measurement surfacebefore the grooves are arranged. A sensitive element is attached to the surface of the measurement surface. Cold joints of the sensitive component are attached to the surface of the material with higher thermal conductivity between the cylindrical base material and the special material, and heat joints are attached to the surface of the material with lower thermal conductivity. The two ends of thesensitive element are connected to output lines. The output lines are drawn through line outlet holes on the cylindrical base. According to the invention, thermal interference caused by the heat fluxsensor can be minimized, the accuracy of measurement can be improved, and the sensitivity and response speed of the heat flux sensor are significantly improved.

Description

technical field [0001] The invention relates to a heat flow sensor based on the thermopile principle, which belongs to the field of sensor measurement. Background technique [0002] The measurement of surface heat flux has attracted more and more attention. At present, heat flux sensors are generally used to measure surface heat flux. The accuracy of surface heat flux measurement is greatly affected by the material and shape of the heat flux sensor. At the same time, the existing heat flux sensor generally only has one thermocouple, and the sensitivity and response speed of the sensor are not high. SUMMARY OF THE INVENTION [0003] The technical problem of the present invention is: to overcome the deficiencies of the prior art, to provide a heat flow sensor based on the thermopile principle, which improves the sensitivity and response speed, and can minimize the measurement error. [0004] The technical solution of the present invention is: a heat flow sensor based on the...

Claims

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Application Information

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IPC IPC(8): G01K17/08
CPCG01K17/08
Inventor 李俊方静冯红亮刘鹏
Owner BEIJING RES INST OF TELEMETRY
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