Portable solar absorptance testing instrument

Abstract

The invention provides a portable solar absorptance testing instrument which comprises a control system, a constant-current drive source, an LED solar simulative light source, an integrating sphere and a detector. The control system controls the constant-current drive source to drive the LED solar simulative light source, receives an illuminance output signal and outputs solar absorptance of a sample to be tested under the current wavelength. The constant-current drive source drives the LED solar simulative light source to generate a light source at a set waveband. The LED solar simulative light source is embedded in a light source hole of the integrating sphere, generates the light source at the set waveband and outputs the light source. The integrating sphere is provided with the sample to be tested, a detector hole and the light source hole. The detector detects diffuse reflection light of the inner wall of the integrating sphere and generates the illuminance output signal. A light-emitting device covering a broadband light source, the detector and the large integrating sphere are used, a high-diffuse-reflection polytetrafluoroethylene material high in reflection is pressed on the inner wall of the integrating sphere, the detector or the light-emitting device is installed on the outer wall of the integrating sphere, and the testing instrument has the advantages of being wide in spectral range, compact in structure, good in solar spectrum fitting characteristic and high in measurement precision.

Description

technical field [0001] The invention relates to a test instrument, in particular to a portable solar absorption ratio detector, which is mainly used in the fields of aerospace, aviation, weapon equipment, architectural coatings and the like. Background technique [0002] The solar absorption ratio is the ratio of the material absorption to the incident solar radiation energy flux. The patent No. 200810075894.4 applied by Beijing Satellite Manufacturing Factory is called "solar absorption ratio detector" and discloses a method for measuring the solar absorption ratio of the surface of an object. The principle of the test instrument is to integrate multiple light emitters with a wavelength range of 380-2500nm on a rotating disk controlled by a stepping motor, control the light sources of different wavelengths to inject into the inner wall of the integrating sphere through the rotation of the motor, and test the total absorption standard samples respectively , the light intensi...

AI Technical Summary

Problems solved by technology

However, this invention does not cover the ultraviolet range below 380nm, and requires high alignment accuracy of the stepping mechanism. If the alignment size deviates, it will cause light path leakage, which will affect the measurement results. The illuminance intensity reflected by the inner wall material magnesium oxide is relatively low. Weak, which affects the measurement accuracy. In addition, the inventive equipment can only measure standard size samples, and cannot carry out on-site detection of products with large areas and complex shapes.

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