Condensation sensor, condensation detection device prepared by using the condensation sensor, and detection method

Abstract

The invention belongs to the technical field of sensors, and particularly relates to a condensation sensor, a condensation detection device prepared by using the condensation sensor, and a detection method. The condensation sensor comprises a detection electrode pair, wherein the detection electrode pair is composed of a first electrode set and a second electrode set, the first electrode set and the second electrode set comprise a plurality of parallel electrodes arranged in a comb tooth shape, the parallel electrodes in the first electrode set and the second electrode set are arranged in a staggered mode, the adjacent parallel electrodes are arranged at equal intervals, and the interval is smaller than 2 mm. The first electrode set is grounded, and the end part of the second electrode setis connected with a radio frequency transmitting circuit; two detection resistors which are connected in series are electrically connected between the first electrode set and the second electrode set, the middle point of the two detection resistors is used as an output point, and the detection circuit detects the voltage value of the output point and judges the condensation condition of the equipment according to the voltage value. The detection device prepared by using the condensation sensor has the advantages of high precision, a low false alarm rate and high reliability.

Description

Technical field [0001] The invention belongs to the technical field of sensors, and specifically relates to a condensation sensor and a condensation detection device and a detection method prepared therefor. Background technique [0002] In the power system, various switch cabinets, compensation cabinets and other cabinet-type equipment are used in large quantities, and these cabinet-type equipment are used in complex environments. Condensation may form inside the device when the humidity is high; according to calculations, when the size of the droplets produced by condensation is greater than 2mm, the droplets may drip, and the dripping droplets may cause a short circuit to the device Other electrical safety incidents affect the normal operation of the power system. In order to solve this problem, technicians use various detection elements to predict the condensation of the equipment, and combine the dehumidification system to dehumidify the inside of the equipment to reduce th...

AI Technical Summary

Problems solved by technology

[0003] Condensation detectors in the prior art mainly include three types: the first is the temperature and humidity sensor, which performs statistics and calculations based on temperature and humidity data to predict the risk of condensation, thereby providing early warning of condensation; The disadvantage of this technology is that the condensation condition is not only affected by temperature and humidity conditions; it is also affected by the particle content in the air, the detection accuracy of the sensor, and other environmental factors, so the accuracy of this prediction is relatively reduced

[0006] However, during the detection process of capacitive sensors, the change of detection capacitance mainly depends on the total volume of droplets between parallel electrodes, rather than the size of individual droplets; if the air humidity is high, abundant small droplets can be formed, then even Small droplets fail to form drippable droplets, and capacitive sensors also give early warning, resulting in false positives

Therefore, the early warning accuracy of capacitive sensors for equipment condensation is relatively low.

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