Title: Sensor node for impact detection
Application Number: 200510096540 Application Date: 2005.08.26
Publication Number: 1837761 Publication Date: 2006.09.27
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G01H11/08
Applicant(s) Name: Hitachi Ltd. Address:
Inventor(s) Name: Tanaka Hidetoshi
Attorney & Agent: hu jianxin
Abstract:
     The invention provides 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. The sensor node for detecting shock comprises a shock detection sensor, consisting of a piezoelectric element unit for generating an AC electric charge by reacting with external shock, an charging circuit for rectifying and charging generated electric charges, and a voltage detection circuit that is operated by accumulated power, and outputs a signal outside when the accumulated voltage reaches a set voltage; a standby control target section that returns from a standby state for operation by an external signal; and a power supply for supplying power to the standby control target section. Then, the standby control target section is operated with a shock signal detected by the piezoelectric element unit as a trigger.
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