Capacitance type moisture condensation sensor

Abstract

The invention relates to a capacitance type moisture condensation sensor which comprises a substrate and a capacitance gate arranged on the substrate. An insulation layer is further arranged on the surface of the capacitance gate, and the capacitance gate comprises two sets of comb type capacitance plates which are distributed in a crossed mode. By means of the capacitance type moisture condensation sensor, and through monitoring of capacitance changes of the capacitance type moisture condensation sensor, automatic monitoring of moisture condensation in meteorological observation can be achieved, corrosion resistance is strong, maintenance is not needed, and manufacturing cost is low.

Description

technical field [0001] The invention belongs to the field of sensors, in particular to a capacitive dew sensor. Background technique [0002] The existing dew sensor in the prior art, figure 1 is a schematic structural diagram of a resistive dew sensor in the prior art, figure 2 for figure 1 Schematic diagram of the structure of the A-A section in the middle, combined with figure 1 and figure 2 As shown, the resistive dew sensor includes a comb-shaped electrode 12 printed on a ceramic insulating substrate 11, and the comb-shaped electrode 12 is covered with a moisture-sensing resistance film 13 formed by resin and conductive particles. Specifically, the humidity-sensing resistance film 13 is formed by sintering hydrophilic acrylic resin and carbon powder. The principle is that when moisture is absorbed on the surface of the dew sensor, the distance between the conductive particles expands and the resistance rises rapidly, and the change of the humidity can be known th...

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Problems solved by technology

However, if the moisture-sensing resistance film 13 is polluted by pollutants in the air, its sensing characteristics will change, resulting in failure. Therefore, it is not suitable to be placed outdoors to monitor natural condensation, and it is only suitable for monitoring whether condensation occurs in laboratories and instruments.

At present, in meteorological observation, the observation of dew condensation is usually done by manually observing whether there is condensation in the observation field and recording it, which is time-consuming and labor-intensive, and the monitoring results have a large deviation from the actual situation.

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