| 摘要 |
PURPOSE:To reduce the influence of operation delay of a proximity switch and to improve pattern detection accuracy by performing pattern deciding operation with delay corresponding to a car speed behind the detection of a strobe signal. CONSTITUTION:The pattern of an array of detection plates F1-F4 arranged at intervals in the running direction of the car body 1 is provided and a detection plate F0 for a strobe, proximity switches S1-S4 which detect the detection plates F1-F4 of the pattern, and a proximity switch S0 for the strobe which detects the detection plate F0 for the strobe and generates a strobe signal are also provided. Further, a pattern deciding circuit 8 and a run control circuit 9 are provided and the pattern deciding circuit 8 is provided with an arithmetic circuit BC which performs deciding operation with the delays corresponding to the car speed behind the detection of the strobe signal. The delay is varied as distance and time according to the car speed. Consequently, the proximity switches can be provided with a margin in the front-rear direction and the pattern is read securely.
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