| 摘要 |
PURPOSE:To prevent assuredly the collision between unmanned trucks by producing a guide current by a transmitting means for a period during which an unmanned truck enters an interference zone and gets out of this zone. CONSTITUTION:The unmanned trucks 1 (1A and 1B) detect the guide matters 2a-2c by detectors 3 and are guided for steering their drive paths 4a and 4b respectively. The 1st rectangular marks 5A and 5B for detection are put on the paths 4a and 4b at the entrance of an interference zone Z. Then an electric wire 6 buried in a loop form between both marks 5A and 5B and a junction point O. The 2nd tool (mark) 7 to be detected is set on a drive path 2c at the exit of the zone Z. While the trucks 1 contain the transmission/ reception means 10 and 11 respectively. When the trucks 1 detect the marks 5A and 5B at the front of the zone Z, the reception means 11 detects the presence/absence of reception signals. While a transmission command signal is delivered from the means 10 when those marks 5A and 5B are not detected, and the trucks 1 pass through the zone Z. Then the trucks 1 detect the mark 7 and releases said command signal. |
