An anti-misdetection humidity sensor

Abstract

The invention belongs to the technical field of sensors, and specifically discloses an inaccurate measurement preventing humidity sensor. The inaccurate measurement preventing humidity sensor comprises a sensor main body, a probe, a humidity sensing area, an upper shell, a driving module, a lower shell, a front segment blowing module, a rear segment blowing module and a base plate, wherein the front segment blowing module comprises a cylinder sleeve, a piston plate, a spring and a trundle; and the rear segment blowing module is used for continuing to blowing down water drops which are blown down by the front segment blowing module. In the inaccurate measurement preventing humidity sensor, the cylinder sleeve and the piston plate are driven by a ball screw to move down together, the trundleat one end of the piston plate moves down along an inclined inner wall of the lower shell, thus, the piston plate is pushed to extrude out the air in the cylinder sleeve from an air outlet at the bottom end of the cylinder sleeve, the extruded compressed air is blown to the surface of the probe, consequently, water hanging on the surface of the probe is blown to the lower end, and then, the rearsegment blowing module further blows the water down, until the water drops out; and finally, clearance for the water hanging on the probe and the humidity sensing area is realized, and inaccurate measurement of the humidity sensor caused by the hanging water is prevented.

Description

technical field [0001] The invention belongs to the technical field of sensors, in particular to an anti-mistesting humidity sensor. Background technique [0002] In some places that require humidity, it is often necessary to install a humidity sensor, and perform corresponding control through the humidity signal obtained by the humidity sensor. But in some places with high humidity, the probe of the humidity sensor is easy to hang water, and once the water is hung, the humidity sensor judges that the humidity of the site is 100%, but the actual humidity has not reached 100%, even if the humidity drops later, If water is still hanging on the probe, the humidity sensor detected and displayed by the water-hanging humidity sensor is still 100%. In this way, there will be false detection of humidity, and the original intention of relative control based on humidity will lose its meaning. It can be seen that how to set up a humidity sensor capable of preventing false detection an...

AI Technical Summary

Problems solved by technology

[0004] This technical solution can blow off the hanging water on the surface of the probe through compressed air, and has a simple structure; but this solution only has a fixed air outlet to blow air on the surface of the probe, so the area that can be blown away is limited. If the length of the probe is too long , it is impossible to directly blow off the hanging water on the surface of the probe; the airflow is stable, so the effect of blowing off the hanging water on the surface of the probe is mediocre

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