Workpiece platform and heating device for reflectivity test of absorbing material

Abstract

The invention discloses a workpiece support platform and a heating device for testing the reflectivity of a wave-absorbing material. The workpiece support platform includes a pillar and a bearing platform connected to the top of the pillar. The test back plate of the sample to be tested, the test back plate is supported on the lower bottom plate through the middle heat insulating part, the lower bottom plate is connected to the pillar, and the middle heat insulating part is surrounded by a wave-absorbing shroud. The heating device includes a manipulator, a heating furnace with a hearth and a workpiece support. The furnace has a furnace mouth that opens downward. The manipulator is connected to the heating furnace and can drive the heating furnace to move so that the workpiece support extends into the furnace mouth or the workpiece support exits. and away from the furnace. The invention has the advantages of good thermal insulation performance, high heating efficiency, good heating uniformity, safe and reliable use, greatly improved testing accuracy and the like.

Description

technical field [0001] The invention relates to the technical field of microwave testing equipment, in particular to a workpiece support platform and a heating device for testing the reflectivity of a microwave-absorbing material. Background technique [0002] Radar absorbing materials (referred to as absorbing materials) are widely used in civil and military fields, and radar reflectivity (referred to as reflectivity) is an important index parameter used to evaluate the absorbing performance of absorbing materials. The reflectivity measurement technology of absorbing materials at room temperature is relatively mature and has been widely used. However, as engines, high-speed aircraft and high-power microwave devices increase the temperature resistance of absorbing materials, radar The requirements of the reflectivity test system are also getting higher and higher. [0003] At present, the high-temperature reflectivity test system mainly adopts the method of bottom heating, ...

AI Technical Summary

Problems solved by technology

The flat plate test base is the same as the test base of the normal temperature reflectance test system. The heating element is arranged under the sample to be tested, but because the heating element layout area cannot exceed the size of the sample to be tested, and is limited by the installation accessories such as heating element electrodes and binding posts, heating The body area will be smaller than the area of ​​the sample to be tested, so there is a problem of uneven heating. The temperature in the central area of ​​the sample to be tested is obviously higher than the surrounding area, resulting in inaccurate test temperature and deformation of the sample to be tested due to uneven heating.

In order to solve the problem of heating uniformity, the Chinese patent application number 201320235754.6 discloses a high-temperature test platform for reflectivity of a hypotenuse test seat. The test platform increases the area of ​​the heating body, making the area of ​​the heating body larger than the area of ​​the test sample. The problem of uneven heating of the flat-panel test seat is well alleviated, but because the area of ​​the heating body is larger than the area of ​​the sample to be tested, especially the area where the heating body is larger than the sample to be tested is treated with a hypotenuse, there is a large error in the electromagnetic wave oblique incidence test process , resulting in the inability to accurately measure the reflectance under oblique incidence conditions

In addition, the sample insulation system of the existing high-temperature reflectance testing system adopts the manual opening method, which has the disadvantages of high temperature easily causing burns to personnel and long operating time.

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