Signal light fault detection device based on voltage effective value

The invention relates to a signal light fault detection device based on a voltage effective value. The device comprises a controller, a switch control circuit, an IO expansion module, a detection module and a voltage conversion circuit. The input end of the switch control circuit is connected with t...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: YANG ZHIHUA, YUE CAILIN, CHEN FAGANG
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention relates to a signal light fault detection device based on a voltage effective value. The device comprises a controller, a switch control circuit, an IO expansion module, a detection module and a voltage conversion circuit. The input end of the switch control circuit is connected with the controller, and the output end is connected with an alternating current L line. The input end of the voltage conversion module is connected with the alternating current L line and N line of both ends of a signal light, and the output end is connected with the input end of the detection module. The output end of the detection module is connected with the controller. The controller, the IO expansion module and the detection module are in SPI communication connection. According to the invention, effective monitoring and accurate judgment are carried out on mistaken signal light lightening, virtual pressure faults and switch circuit faults by detecting and judging the terminal voltage effective value of the signal l