Non-contact real-time detection method for fan in high-frequency interference environment

Abstract

The invention discloses a non-contact real-time detection method for a fan in a high-frequency interference environment, and belongs to the technical field of short wave transmitter fan fault detection, and the detection method comprises the following specific steps: (1) system installation and deployment; (2) acquiring signals in real time; (3) data acquisition and calculation; (4) judging and displaying by the upper computer; according to the invention, by utilizing the difference of the reflection characteristics of laser and the laser reflection characteristics of different materials, combining a pulse counting algorithm, and adopting all-digital signal transmission and calculation, real-time accurate counting can be realized in a high-frequency environment in a non-contact process, and then the collected pulse data are calculated, so that the real-time accurate counting can be realized. The fan is monitored in real time through man-machine interaction software, and the influence of fan faults on transmitter equipment and safe broadcasting can be effectively prevented and controlled; the blank in the field of transmitter fan real-time detection in China is filled, and a method is provided for realizing real-time monitoring in a high-frequency interference environment.

Description

technical field [0001] The invention relates to the technical field of short-wave transmitter fan fault detection, in particular to a non-contact real-time detection method for a fan in a high-frequency interference environment. Background technique [0002] When the shortwave transmitter is working, the components will emit a lot of heat. If the heat is not dissipated in time, the performance of the components will be degraded or even burned due to overheating. Nowadays, the main cooling methods of 150KW transmitters are air cooling and water cooling; The contacts are mainly used to detect high-cycle (high-end and high-pre-stage tube sockets, emission tube lamp stems, filaments, grids, high-cycle tank coils, cavity feeders) and PSM module blowing, while for high-end transformers , 400V power supply, oil load and other components with large heat generation use axial fans for blowing cooling; at present, the fault detection of axial fans for short-wave transmitters is mainly ...

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Problems solved by technology

[0002] When the short-wave transmitter is working, the components will emit a lot of heat. If the heat is not dissipated in time, the performance of the components will be degraded or even burned due to overheating. Nowadays, the main cooling methods for 150KW transmitters are air cooling and water cooling; among them, wind The contact is mainly to detect high-cycle (high-end and high-end tube holders, launch tube lamp stems, filaments, grids, high-cycle tank coils, cavity feed tubes) and PSM module blowing, and for high-end transformers , 400V power supply, oil load and other components with high heat generation are cooled by axial flow fans; at present, fault detection for axial flow fans of shortwave transmitters is mainly realized through manual inspection, but due to the installation location of these fans and other reasons , It is difficult to check whether the fan is running normally without opening the case door, and some fans stop running after falling high voltage or opening the case door, such as oil load and 400V fan, check whether the fan is normal at this time, In the case of short-circuiting the door switch, it is necessary to perform operations such as closing the machine, which also increases the safety risk;

[0003] Due to high-frequency interference and installation location, there is currently no method and system for real-time detection of cooling fans during transmitter operation in China; after analysis, non-contact methods can be used for fan monitoring, but within the range of short-wave transmitters, there are often There is high-frequency interference, which requires high test methods and sensors in the non-contact method; therefore, we propose a non-contact real-time detection method for fans in a high-frequency interference environment

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