Ventilation device of temperature sensor for meteorological measurement

Abstract

The invention provides a ventilation device of a temperature sensor for meteorological measurement. The ventilation device comprises an anti-radiation cover and a circular truncated cone structure, cattle horn-shaped ventilating pipelines are arranged in the anti-radiation cover and used for ventilating the anti-radiation cover; the number of the ventilation pipelines is at least four, each ventilation pipeline comprises an inlet and an outlet, the inlets are formed in a side wall of the anti-radiation cover, the diameters of the ventilation pipelines are gradually reduced from the inlets to the outlets, and the outlets are located below the inlets; a temperature sensor probe is arranged at the central position of each outlet; and an inner wall of the ventilation pipeline is uniformly coated with a black anti-reflection layer. According to the ventilation device of the temperature sensor for meteorological measurement provided by the invention, the cattle horn-shaped ventilation pipelines arranged on the anti-radiation cover can promote the flow of airflow in the anti-radiation cover, so that the radiation temperature rise of the anti-radiation cover is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of meteorological detection, in particular to a ventilation device for a temperature sensor used for meteorological measurement. Background technique [0002] In the process of measuring the air temperature by the temperature sensor of the weather station, the solar radiation during the day causes the temperature sensor to heat up, which is higher than the air temperature of the surrounding environment. The error caused by this phenomenon is called the solar radiation error. At present, the weather station uses shutters or natural ventilation radiation shields to avoid direct radiation from the sun to the temperature sensor probe and reduce radiation errors. Since it is impossible to achieve 100% reflectivity on the surface of white coatings or other blade materials, to a certain extent, traditional shutters and radiation shields, especially their blades and annulus, still produce significant radiative heati...

AI Technical Summary

Problems solved by technology

The use of blades or rings helps to meet the first requirement, but it is difficult to meet the second requirement, making it difficult to eliminate the effect of thermal pollution

Therefore, there is a contradiction between the above two design requirements, which brings difficulties to the improvement of the performance of the radiation shield

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