System and method for high-sensitivity sensor
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United States of America Patent
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Nov 24, 2009
Grant Date -
Nov 30, 2006
app pub date -
Jul 28, 2006
filing date -
May 27, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A sensor unit includes at least one sensor configured to measure an ambient condition. The controller can be configured to receive instructions, to report a notice level when the controller determines that data measured by the at least one sensor fails a report threshold test corresponding to a report threshold value. The controller can also be configured to obtain a plurality of calibration measurements from the at least one sensor during a calibration period and to adjust the threshold based on the calibration measurements. The controller can be configured to compute a first threshold level corresponding to background noise and a second threshold level corresponding to sensor noise, and to compute the report threshold value from the second threshold. In one embodiment, the sensor unit adjusts one or more of the thresholds based on ambient temperature.
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