Abstract
The interrogation method involves applying a periodic electrical signal to a gas sensor. A signal is obtained from it. An operation is performed on the obtained signal to obtain the sensor response at several frequencies. The operation includes a transformation to the frequency domain of the signal or a quality related to the signal.The gas sensor includes semiconducting organic polymer. Alteratively the gas sensor is a metal oxide, bulk acoustic wave or surface acoustic wave device. The periodic electrical signal is a pseudo random binary signal.ADVANTAGE - Improved performance of multifrequency measurement of sensors in which time domain measurement techniques are accompanied by appropriate transformation to frequency domain.
| Original language | English |
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| Patent number | WO9718467-A; EP861438-A; WO9718467-A1; AU9675834-A; EP861438-A1; JP2000500861-W; US6236951-B1; EP861438-B1; DE69627175-E |
| Publication status | Published - 1997 |