Dew point transducer
A dew point sensor and device technology, applied in the direction of material water content, etc., can solve the problems of low sensitivity and slow response, and achieve the effect of improving sensitivity and response speed
Inactive Publication Date: 2014-04-23
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology
[0004] At present, the method of measuring the dew point by the optical dew point meter is basically to judge the amount of dew point by the change of the intensity of the reflected light of a single mirror. Although this structure is simple, it has the disadvantages of slow response and low sensitivity.
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[0018] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings.
[0019] Such as figure 1 The shown dew point sensor includes a heat sink 8, a refrigerator 7 fixed on the heat sink 8, a mirror 6 attached to the upper surface of the refrigerator 7, a support plate 5 fixed on the mirror 6, and the support plate 5 is horizontally erected The transparent plate 4 above the mirror surface 6, the supporting plate 5, and the transparent plate 4 are all made of heat-conducting materials. The transparent plate 4 is made of sapphire, and the supporting plate 5 can be made of metal, silicon carbide or aluminum nitride.
[0020] The supporting plate 5, the transparent plate 4, and the mirror surface 6 can be fixedly connected in the following three ways:
[0021] (1) The support plate 5 is bonded to the upper surface of the mirror surface 6 through heat-conducting glue, and the transparent plate 4 is bonded to the support pl...
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The invention provides a dew point transducer and belongs to the technical field of atmosphere detection. The dew point transducer comprises a heat radiation sheet, a refrigerating machine fixed on the heat radiation sheet, a mirror surface stuck on the upper surface of the refrigerating machine, a supporting plate fixed on the mirror surface, and a transparent plate which is horizontally erected above the mirror surface by the supporting plate, wherein the supporting plate and the transparent plate are made of heat-conduction materials. With the adoption of the supporting plate and the transparent plate which are made of the heat-conduction materials, the temperatures of the transparent plate and the mirror surface are the same and the transparent plate is dewed when the mirror surface is dewed; the transparent plate is dewed so that emission light is greatly attenuated on a light path and the variation amplitude of a reflection light signal is increased; the sensitivity of a dew point detector is improved, and the responding speed of the dew point detector is increased.
Description
technical field [0001] The invention relates to a dew point sensor, which belongs to the technical field of atmospheric detection. Background technique [0002] Humidity is a very important component in atmospheric measurements. As we all know, relative humidity is a physical quantity that indicates whether the water vapor contained in the air is close to saturation at a certain temperature and pressure. The higher the relative humidity, the closer the water vapor in the air is to saturation. When the water vapor in the air reaches saturation When it condenses into water, it is called condensation, and the temperature at this time is called dew point temperature. Theoretically, for air at a given temperature and pressure, its relative humidity corresponds to the dew point temperature. Therefore, as long as the dew point temperature is found while keeping the pressure constant, the relative humidity can be determined by conversion, which is The principle of measuring relati...
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Inventor 刘清惓谢钟镭王月孙冬娇
Owner NANJING UNIV OF INFORMATION SCI & TECH