| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a train detector and mobile body detector, reduced in cost by its simple structure and enhanced in safety. <P>SOLUTION: When a train 3 advances from a section AT to a section BT, since wheels 4R, 4L of the train 3 move while rolling on rails 7R, 7L, the rails 7R, 7L in the section BT are oscillated by being imparted with an impact force. When the rails 7R, 7L are oscillated, a detection unit 12 detects the oscillation, a piezoelectric rubber part of the detection unit 12 is imparted with an external force and mechanically displaced. Thus, potential difference is generated between a pair of electrode parts at both ends of the piezoelectric rubber part, and current runs in conductive parts 12f, 12g. As a result, the detection unit 12 converts the oscillation generated when the train 3 advances in the section BT into an electric signal, and the electric signal is input in the determination unit 13. Thus, the determination unit 13 determines that the train 3 exists in the section BT, and changes a track relay 2b of a signal device 2 so that the signal device 2 indicates a stop signal (a red signal). <P>COPYRIGHT: (C)2010,JPO&INPIT |
