| 摘要 |
PURPOSE:To save power by providing a power supply section decreasing the power supply to a radio receiving section by means of the 2nd switch repeating turning on/off with an output of the 1st switch oscillator operated with light and a display section continuing the display operation independently of the output of the oscillator and the transmission output. CONSTITUTION:The power supply section 1, the radio receiving device section 2 detecting whether or not information corresponding to the own specific code is included in a transmitted radio wave, and the display section 3 started in response to this output are provided, and a photoelectric converting element 5 of each radio receiver for detecting position is not operated and the power consumption is zeroed when no night work is conducted. The radio receiving section 2 is brought in the operating period when the oscillator 7 gives a positive output and receives the own information signal. In detecting the own signal, the section 2 lights a display body 9 via a flup-flop 10, the display body 9 is distinguished by depressing a pushbutton switch 14 and the receiving section 2 is reset to the original state receiving the radio wave. |
