Self-powered sensor system
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United States of America Patent
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Sep 12, 2017
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app pub date -
Sep 13, 2011
filing date -
Sep 13, 2011
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Abstract
A self-powered sensor system and sensing method includes a power source generating power which is a function of a first parameter such as vibration. A charge management circuit is responsive to the power output by the power source and is configured to provide, every charge cycle, a supply signal to a controller which activates it to control a transmitter to transmit data at a transmission rate which is a function of the charge cycle. The data and the transmission rate are processed and used to identify a variation in the first parameter by a variation in the transmission rate beyond a predetermined threshold.
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