| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wireless sensing device that can be operated endlessly without replacing a battery. <P>SOLUTION: A charging type battery is added to the wireless sensing device for charging the battery by radio. When electric waves received by an antenna circuit are converted to electrical energy, the battery stores the electrical energy. A sensor circuit uses the electrical energy stored in the battery for drive to acquire information. A signal including the acquired information is converted to electric waves in the antenna circuit for reading by radio. <P>COPYRIGHT: (C)2008,JPO&INPIT |
