Near-field thermal radiation experiment measurement device

Abstract

The invention discloses a near-field thermal radiation experiment measurement device, relates to the technical field of radiation heat exchange test, and solves the technical problems to realize accurate measurement of a near-field thermal radiation heat exchange amount under a micro-nano scale. During measurement, the transverse thermal radiation loss is low, and the mechanical structure is simple. The device comprises an upper displacement loading device (1), a lower displacement loading device (2), a sealed chassis device (3), a vacuum hood (4), a measurement unit (5) and a distance measuring optical fiber (6), wherein the measurement unit (5) is placed between the upper displacement loading device (1) and the lower displacement loading device (2); the distance measuring optical fiber (6) penetrates through the upper displacement loading device (1) and ends at the measurement unit (5); a clearance distance of detected samples can be obtained via spectral analysis. During measurement, the near-field thermal radiation experiment measurement device is low in transverse thermal radiation loss; the distance between the samples can be adjusted by two modes within a large range; the accurate measurement of the near-field thermal radiation heat exchange amount under the micro-nano scale is realized.

Description

technical field [0001] The present invention relates to the technical field of radiation heat transfer testing, in particular to a near-field heat radiation experiment measuring device, comprising: an upper displacement loading device, a lower displacement loading device, a sealed chassis device, a vacuum cover, a measuring unit, and a distance-measuring optical fiber. Background technique [0002] All objects in nature, as long as the temperature is above the absolute temperature of zero, will continuously transmit heat outward in the form of electromagnetic waves and particles. This way of transmitting energy is called radiation. The constant thermal vibration of electrons and particles in matter makes the matter radiate electromagnetic waves continuously. The electromagnetic wave radiation generated by heat is called thermal radiation, and the wavelength range is 0.1μm-100μm. Near-field thermal radiation refers to the phenomenon of enhanced thermal radiation at the micro...

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Problems solved by technology

[0006] The second type uses traditional mechanical devices combined with micro-electromechanical system devices, such as using stepping motors, differential screws, etc. to adjust the distance between the transmitter and the receiver, and generally studies the near-field heat radiation between the plates, and the distance is generally sub-micron The disadvantage is that when the displacement is controlled by the differential screw, the highest resolution is about 1 micron, which is difficult to reach the nanometer level and the mechanical structure is complicated.

[0007] The third category is devices processed by micro-nano electromechanical systems, such as suspended film structures and micro-actuator structures. The micro-actuator structure uses the principle of thermal expansion to control the distance between two micro-planes, so as to study the corresponding near-field thermal radiation phenomenon. Disadvantages The structure and manufacturing process are complicated, and deformation analysis such as mechanics is required in advance.

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