| 摘要 |
PURPOSE: To allow the location of a slave set or a master set to be grasped by using a position detection means to detect the location of the slave set or the master set and displaying the location. CONSTITUTION: A search button 14 is depressed. A control section 19 detects it and a transmission reception section 21 sends a search radio wave to an antenna 11 and the antenna 11 sends the radio wave to a slave set 22. The slave set 22 uses a transmission reception section 24 to receive the radio wave from an antenna 23 and a control section 25 detects the radio wave to be a search radio wave. Through the detection, a search radio wave received by the control section 25 is returned to the master set. The master set uses a transmission reception section 21 to receive the search radio wave. Then the search radio wave returned by the control section 19 is used and arm arithmetic means calculates the direction of the slave set 22 and the distance up to the master set and the result is stored in a memory 20. Then a display section 12 displays the location of the slave set 22. That is, the direction and the distance are displayed on a character display section 12a and the direction is indicated by an arrow on a graphic display section 12. |
