| 摘要 |
A method of sensor conditioning is proposed for improving signal output stability and differentiation between responses to different gases such as exhaust from combustion processes. A square wave (or saw tooth) voltage puls es of opposite polarity and equivalent amplitude are applied between sensor electrodes. Pulses are separated by pauses, when charging power supply is disconnected from the sensor and sensor discharge is recorded. Useful information regarding concentration of analyzed gases can be extracted from two measurement methods.: 1. Measuring open circuit voltage decay during the pause immediately following voltage pulse. 2. Measuring the charging current during positive (negative) pulses and the discharging current during pauses following voltage pulses.
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