| 摘要 |
PROBLEM TO BE SOLVED: To provide a vehicular approach alarm device that is easily installed, has a small size of field work installing type, and is excellent in remote detection. SOLUTION: In this system, a train current detecting sensor is attached on a rail in a foot portion through a mount magnet, and directly connected from an output portion of the sensor to an amplifier input portion of an amplifier for the sensor built in a computing processing device through a low noise cable. A result processed by the computing processing device is sent from a computing output portion to an alarm input portion as a signal through a connecting cable, thereby sounding an alarm. The system is simplified, and the sensor can be attached on the rail in the foot portion, and a detecting device is a portable type.
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