| 摘要 |
PURPOSE:To measure the position of a vehicle from a photodetecting angle and both end positions of a cylindrical photodetecting surface by installing a laser light emitting device on the vehicle and installing a laser photodetector stuck to a cylindrical shape on a laser photodetecting plate at the point which is the reference on the ground. CONSTITUTION:The position measurement is made by determining the vehicles 41, 42 and the laser photodetector 49 as one group and the vehicle 44 and the laser photodetector 50 as another group if there is an obstructive object 58 between the vehicles 41, 42 and the vehicle 44. An instruction for laser light emission is emitted from a transmitter 57 in a control office 55 to a receiver 51 of the vehicle 41 in the case of measuring, for example, the vehicle 41. The laser light from the laser light emitting device 45 is detected by the photodetec tor 49 and the detected information is transmitted by a cable 59 to a position calculator 56 in the office 55. The position measurement of the vehicle 41 is executed in the calculator 56 from the potodetecting angle of the photodetector 49 and both end positions (a), (b) on the cylindrical photodetecting surface. The similar process is executed with the vehicles 42, 44 as well and the positions of the respective vehicles are measured.
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