Method and apparatus for the detection of the response of a sensing device
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United States of America Patent
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Mar 15, 2005
Grant Date -
Oct 14, 2004
app pub date -
Apr 11, 2003
filing date -
Apr 11, 2003
priority date (Note) -
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Abstract
A method for operating a sensing device. The method comprising: a sensor film having an electrical resistance that is adapted to change in response to the presence of a predetermined condition; detecting the presence of the predetermined condition; measuring the electrical resistance of the sensor film at a first time; measuring the electrical resistance of the sensor film at a second time; determining a rate of change of the electrical resistance between the first time and the second time; and comparing the rate of change of the electrical resistance against a threshold value.
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