On-vehicle device, display device, and parking brake release detection method

摘要

A battery 25 capable of supplying power when the vehicle power is turned off, and a parking brake 12 for fixing wheels when the vehicle is stopped, for the purpose of detecting the movement of the train when the power is turned off without always performing communication. The vehicle is equipped with a parking brake control electromagnetic valve 14 that is energized by the electric power supplied from the battery 25 when the parking brake 12 is released, and the train position information stored when the vehicle power is turned on is also stored when the vehicle power is turned off. The on-vehicle device 20 to be held, the parking brake control electromagnetic valve energization detecting unit 15 for detecting the energization of the parking brake control electromagnetic valve 14 when the vehicle power is off, and the detection result until the stored contents are reset A parking brake release detection circuit 40 having a parking brake control electromagnetic valve energization detection storage unit 16 for storing.