A dew condensation sensor and a dew condensation detection device and detection method prepared therefrom

Abstract

The invention belongs to the technical field of sensors, and in particular relates to a dew condensation sensor and a dew condensation detection device and detection method prepared therefrom. The dew condensation sensor includes a detection electrode pair, the detection electrode pair is composed of a first electrode group and a second electrode group, the first electrode group and the second electrode group include a plurality of parallel electrodes arranged in a comb-like shape, the first electrode group and The parallel electrodes in the second electrode group are staggered, and the adjacent parallel electrodes are arranged at equal intervals, with a spacing of less than 2 mm; the first electrode group is grounded, and the end of the second electrode group is connected to a radio frequency transmitting circuit; the first electrode group Two detection resistors in series are electrically connected with the second electrode group, the middle point of the two detection resistors is used as an output point, the detection circuit detects the voltage value of the output point, and judges the equipment dew condensation according to the voltage value. The detection device prepared by using the dew condensation sensor has the advantages of high precision, low false alarm rate and high reliability.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a dew condensation sensor and a dew condensation detection device and detection method prepared therefrom. 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 work sites. Condensation may form inside the device when the humidity is high; according to calculations, when the size of the droplets produced by condensation is larger than 2mm, the droplets may drip, and the dripping droplets may cause a short circuit to the device Such as electrical safety accidents, affecting 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 interior of the equi...

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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