| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a watt-hour meter in which a timer can be operated for a long time without depending on a battery as a short service life component during power interruption. <P>SOLUTION: A watt-hour meter includes a radio detecting means for detecting radio wave from the outside and a d.c. converting means for converting the detected radio wave into d.c. voltage. Thus, a radio detecting section 115 receives radio wave from the outside, a rectification section 116 rectifies a received a.c. signal, a boosting section 117 boosts to charge a charging section 118, and the d.c. voltage is supplied as power supply voltage to a timer section 113. <P>COPYRIGHT: (C)2011,JPO&INPIT |
