A black body of an inner conical uniform temperature target heat pipe

Abstract

The present invention relates to an inner cone type temperature equalizing target heat pipe blackbody and belongs to the radiation temperature measurement technical field. According to the device, a blackbody cavity (7) and a heat pipe (5) are designed integrally, so that heat conduction loss between the heat pipe and the blackbody cavity can be decreased, and therefore, heating efficiency and a temperature rise rate can be improved; an inner cone type temperature equalizing target (4) is arranged at the bottom of the blackbody cavity (7), and a distance between a standard thermocouple and the surface of the target is made as small as possible, so that the accuracy of the temperature of the surface of the target can be ensured; the inner cone type temperature equalizing target can assist in increasing the insertion depth of the standard thermocouple or a platinum resistor, so that heat conduction error can be decreased; and the heat pipe (5) adopts three-section heating, and the temperature sensor (1) of each section of the heat pipe (5) is installed on the external wall surface of the heat pipe, and two sections of the heat pipe wrap the exterior of the cylinder of the heat pipe, and the third section is a heating disc and is arranged at the bottom of the heat pipe, and the temperature of the three sections is adjusted respectively, so that the uniformity of the axial temperature field of the blackbody cavity can be guaranteed. Compared with the prior art, the inner cone type temperature equalizing target heat pipe blackbody of the invention has the advantages of high temperature uniformity and high accuracy.

Description

technical field [0001] The invention relates to a uniform temperature target heat pipe black body, in particular to an inner cone type uniform temperature target heat pipe black body, which belongs to the technical field of radiation temperature measurement. Background technique [0002] Blackbody radiation sources are often used in the verification and calibration of radiation thermometers. Heat pipe blackbody radiation sources are widely used in various high-precision radiation temperature tests due to their advantages of good temperature uniformity and high accuracy. However, the commonly used heat pipe-type blackbody radiation source uses the heat pipe as a heat equalizer, and placing the blackbody cavity inside the heat pipe will cause heat conduction loss between the blackbody cavity and the heat pipe (such as application number 201010164116.0 "Blackbody Cavity Radiation Source"); The black body cavity is usually tapered for the convenience of processing. It is difficu...

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Problems solved by technology

However, the commonly used heat pipe-type blackbody radiation source uses the heat pipe as a heat equalizer, and placing the blackbody cavity inside the heat pipe will cause heat conduction loss between the blackbody cavity and the heat pipe (such as application number 201010164116.0 "Blackbody Cavity Radiation Source"); The black body cavity is usually tapered for the convenience of processing. It is difficult to have a sufficient insertion depth for the thermocouple or platinum resistance as a reference temperature sensor. At the same time, it is difficult to ensure that the distance between the target surface and the standard is close enough to make the target surface temperature The temperature is the same as that of the standard (such as application number 201010599646.8 "a cavity device for a black body radiation source"); the usual heating device is outside the heat pipe cylinder, and there is no heating device at the bottom, which makes the overall temperature gradient difficult to meet the design requirements

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