| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a collision prevention control system capable of avoiding a collision of carrier trucks when a communication line built in a junction area is single and also when defect occurs in the communication line. <P>SOLUTION: A carrier truck 1a entering the junction area 10 receives a signal of the communication line 7 with a receiver 3a, analyzes it, and it is decided by a control part 8a if a signal waveform transmitted by another carrier truck in another junction area has been received. When it is decided that the signal waveform transmitted by the carrier 1b has been received, running is stopped. When it is decided that the signal waveform indicating that the carrier truck 1b exits the junction area 10 is not received a signal meaning the junction area of its own car is transmitted by a transmitter 2a, a signal on the communication line 7 is received by the receiver 3a and analyzed, and it is decided if the signal transmitted by its own car can be detected by the control part 8a. When it is detected, running in the junction area 10 is continued, but when it cannot be detected, it is determined that an abnormality has occurred to the communication line 7 to stop all the carrier trucks. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
