| 摘要 |
PROBLEM TO BE SOLVED: To provide a sensor node for detecting a shock that determines the strength of the shock via multiple values or analog input and reducing the power consumption of the sensor node. SOLUTION: The sensor node for detecting shock comprises a shock detection sensor 102, consisting of a piezoelectric element unit 105 for generating an AC electric charge by reacting with external shock, an charging circuit 106 for rectifying and charging generated electric charges, and a voltage detection circuit 107 that is operated by accumulated power, and outputs a signal outside when the accumulated voltage reaches a set voltage; a standby control target section 103 that returns from a standby state for operation by an external signal; and a power supply 104 for supplying power to the standby control target section. Then, the standby control target section 103 is operated with a shock signal detected by the piezoelectric element unit 105 as a trigger. COPYRIGHT: (C)2007,JPO&INPIT
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