G - Physics – 08 – G
Patent
G - Physics
08
G
324/58
G08G 1/00 (2006.01) G01R 19/00 (2006.01) G01R 31/36 (2006.01) G08G 1/123 (2006.01)
Patent
CA 1171462
Abstract of the Invention This invention relates to a device for automatically monitoring the charging state of the independent current supply of the transponder of a network for determining the position of traffic systems, wherein there is coordinated with the current supply (primary batteries or accumulators ad- apted to be charged via solar cells) a monitoring sensor with a defined re- sponse threshold. The humidity of the ambient atmosphere is additionally monitored by providing a sensor inside the device. The sensor indicates any excess of a predetermined limiting value of the humidity inside the trans- ponder which under normal operational conditions is kept at low values. If the humidity sensor detects excess humidity, it produces a signal which is mixed with the monitoring signal via an OR gate and included in a response telegram to be sent to an interrogating unit.
342423
Aktiengesellschaft Siemens
Fetherstonhaugh & Co.
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