Double-mirror dual-optical path chilled-mirror dew-point hygrometer

Abstract

The invention relates to precision detection of an industrial gas dew point and concretely relates to a double-mirror dual-optical path chilled-mirror dew-point hygrometer. The double-mirror dual-optical path chilled-mirror dew-point hygrometer solves the problem that the traditional chilled-mirror dew-point hygrometer has harsh requirements on environmental working conditions such as an environment temperature, has a slow measurement speed and is not easy to carry because of large weight and volume of the whole hygrometer. The double-mirror dual-optical path chilled-mirror dew-point hygrometer uses two photoelectric measurement systems comprising two mirrors, two light sources and two optoelectronic receiver components, utilizes a temperature balance pressure plate and a measurement chamber to maintain temperature balance so that the equipment environment adaptability is improved, utilizes a special small Stirling cryocooler as a cold source which can quickly and accurately cool the object to 100 DEG C or less without any aid, so that the whole hygrometer volume and weight are greatly reduced, and directly utilizes the top surface of a refrigeration end of the Stirling cryocooler as a detection mirror surface so that the detection accuracy is improved.

Description

technical field [0001] The invention relates to a gas-water dew point precision detection device, in particular to a chilled mirror dew point meter based on a double-mirror surface and double-optical path structure. [0002] technical background [0003] Humidity is a physical quantity that expresses the moisture content in a gas. Under the same ambient temperature, the less water vapor contained in the same volume of air, the lower the humidity; conversely, the more water vapor it contains, the greater the humidity. Humidity is closely related to human survival. At 18°C, the optimum humidity for the human body is 30%RH to 40%RH; at 25°C, the optimum humidity is 40%RH to 50%RH. When the humidity is lower than the suitable range for the human body, it is easy to cause respiratory discomfort, such as dry lips, sore throat, nasal cavity bleeding and other symptoms; when the humidity is higher than the suitable temperature range for the human body, the evaporation rate of sweat ...

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