Sensor node for impact detection

Details Sensor node for impact detection Sensor node for impact detection

2007-11-06

2007-11-06

Thompson, Jewel (Department: 2855)

Measuring and testing

Testing by impact or shock

Reexamination Certificate

active

11211485

ABSTRACT:
The invention is intended to provide a technique regarding sensor nodes for impact detection to enable the intensities of impacts to be determined in a multi-value or analog mode and to reduce the power consumption of sensor nodes. The sensor node is provided with a shock detection sensor comprising a piezoelectric element unit which generates an electric charge corresponding to an external impact, a capacitor which rectifies and accumulates the electric charge so generated, and a voltage detector which operates on the accumulated power and externally outputs a signal when the accumulated voltage reaches a preset level; a stand-by control object section which is caused by the external signal to return from a stand-by state and to operate; and a power supply which feeds power to the stand-by control object section, wherein the operation of the stand-by control object section is triggered by the signal of impact detected by the piezoelectric element unit.

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patent: 6236527 (2001-05-01), Uchiike et al.
patent: 6510014 (2003-01-01), Kikuta et al.
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patent: 08-145783 (1994-11-01), None
patent: 09-264778 (1996-03-01), None
patent: 10-260202 (1997-03-01), None

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