High-precision temperature sensor device based on infrared antireflection film

Abstract

The invention belongs to the technical field of sensors, and relates to a high-precision temperature sensor device based on an infrared antireflection film. The high-precision temperature sensor device comprises a lens, an optical filter, a modulation disc, an infrared detector, a pre-amplifier, a frequency selective amplifier, a synchronous detection circuit, an adder, an emissivity adjusting circuit, an A / D converter and a digital picture tube which are arranged in sequence. The multivibrator is connected with the synchronous detection circuit and a stepping motor, and the stepping motor isconnected with the modulation disc; an environment temperature sensor which is connected with the amplifying circuit and the adder in sequence is also arranged around the modulation disc; the infraredantireflection film is evaporated on the surface of the lens, the bottom layer of the infrared antireflection film is a zinc-magnesium-cesium-yttrium alloy layer, and the upper layer of the infraredantireflection film is a conventional DLC layer. Compared with the prior art, the zinc-magnesium-cesium-yttrium alloy is adopted as the infrared antireflection film, three-layer coating is avoided, the waveband range of a middle-far infrared region is widened and is 2-12 microns, the light transmittance change is stable, the transmittance of all wavebands is greater than 94.3%, and thus the precision of the infrared temperature sensor device can be improved.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a high-precision temperature sensor device based on an infrared anti-reflection film. Background technique [0002] In nature, any object whose temperature is higher than absolute zero is constantly emitting infrared radiation energy to the surrounding space. The size of the infrared radiation energy of an object and its distribution according to the wavelength have a very close relationship with its surface temperature. Therefore, by measuring the infrared energy radiated by the object itself, its surface temperature can be accurately determined, which is the objective basis for infrared radiation temperature measurement. Infrared-based temperature measurement sensors have the advantages of simplicity, intelligence, low price, and stable performance, and are favored by various customers in the market. [0003] The infrared temperature measuring device is composed o...

AI Technical Summary

Problems solved by technology

Compared with the near-infrared region (0.76-3μm) and mid-infrared region (3-5μm), the mid-to-far infrared region (5-14μm) has a wider range, and there are still few infrared anti-reflection coatings that can satisfy such a wide range of high light transmittance at the same time. , so the accuracy of existing infrared thermometers is low

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