| 摘要 |
<p>PURPOSE:To improve the operability of a position detector by using a position indicator of a radio wave system. CONSTITUTION:The ratio waves are sent to one of plural working position indicators 4 containing tuning circuits 41 which use the prescribed frequencies as their tuning frequencies and have different internal losses from loop coils 11-1-11-48 of a position detecting part 1. While the radio waves transmitted from the circuits 41 are received by those coils 11-1-11-48. In this case, the induced voltage is detected for all coils 11-1-11-48. Then the designated positions of indicators 4 are detected from a large quantity of obtained induced voltage. At the same time, the attenuation degree of the induced voltage is detected for detection of the internal circuit loss and the working indicators 4 are identified. Thus it is just required to provide a tuning circuit containing a coil and a capacitor as the primary elements at the side the indicator 4. Then the operability is improved with a position detector.</p> |
