| 摘要 |
PURPOSE:To realize the safe remote controller for an unmanned truck by monitoring the intensity of a signal from the unmanned truck and a power supply voltage of the remote controller. CONSTITUTION:A pattern signal sent at a prescribed time interval from an unmanned truck is received by a reception circuit 9 through an antenna 11, only the noise component is amplified and the transmission reception sensitivity with respect to the unmanned truck is monitored by using a radio wave measuring circuit 7 comparing the S/N and when the reception of a normal signal is disabled due to excess of the control enable range, a control circuit 10 outputs a signal to a warning circuit 6 to blink an alarm display LED or an alarm buzzer 5. Moreover, A voltage drop of a DC power supply 2 is measured by a power supply measurement circuit 8 to detect the control enable range and the control circuit 10 sends a signal to a warning circuit 6 and a blink pattern different from the fault of transmission reception sensitivity is implemented by the warning display LED or the warning buzzer 5. Thus, the highly safe remote controller is inexpensively realized. |
