Humidity sensor

Abstract

The invention relates to the field of sensors, in particular to a humidity sensor. The humidity sensor comprises a slide rail, a fixed seat, a sensor body, fixed holes, an adjusting structure, balls,a slide bar, a cleaning plate, a pressure spring, rollers and a cleaning structure. By sliding a sensor body, the fixed seat slides on the slide rail to drive the two balls to roll along the inner side wall of the slide rail so as to clean dust on a rolling column through the cleaning plate, so that the sliding effect of the fixed seat on the slide rail is improved. After the ball rolls to one ofthe fixed holes, the slide bar is pushed to slide outside the inner side wall of the fixed seat by means of an elastic force of the pressure spring in a retracted state to push the two balls into thetwo symmetrical fixed holes, so that the fixed seat is clamped and fixed in the slide rail, and therefore, the sensor body is fixed. By moving the sensor body to be fixed to detect humidity of a vegetable greenhouse in different positions in three time periods: in the morning, at noon and in the evening, supplementing adjustment on water of vegetables is facilitated.

Description

technical field [0001] The invention relates to the field of sensors, in particular to a humidity sensor. Background technique [0002] The humidity sensor is the simplest humidity sensor. The humidity sensor mainly has two types: resistive and capacitive. The characteristic of the humidity sensor is that the substrate is covered with a film made of moisture-sensitive material. When vapor is adsorbed on the moisture-sensitive film, both the resistivity and resistance value of the element change, and humidity can be measured by utilizing this property. [0003] Humidity sensors are usually used in vegetable greenhouses to test the humidity in different locations, so as to adjust the appropriate humidity of vegetables inside the greenhouse and increase vegetable production. Traditional vegetable greenhouses need to use multiple humidity sensors when detecting the humidity in different locations. Humidity detection at different times results in an increase in cost, and at the ...

AI Technical Summary

Problems solved by technology

[0003] Humidity sensors are usually used in vegetable greenhouses to test the humidity in different locations, so as to adjust the appropriate humidity of vegetables inside the greenhouse and increase vegetable production. When detecting the humidity in different locations in traditional vegetable greenhouses, multiple humidity sensors are required. Humidity detection at different times results in increased costs. At the same time, the disassembly of multiple humidity sensors is more complicated, which affects the efficiency of humidity detection.

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