Design Of The Interface Electronics For An Integrated Microsensor For The Preventive Detection Of Water Condensation

We are developing a new type of integrated microsensor for the preventive detection of water condensation. The sensor operation is based on a thermal oscillation generated by Peltier effect at a junction. When water droplets form upon cooling of the junction sensitive area, the thermal oscillation is perturbed, resulting in its frequency shifts. This shift allows us to determine in advance the conditions for mist formation. To operate the microsensor, we designed an interface electronics able to generate and control the thermal oscillation. For the acquisition and processing of the sensor output signal, we investigated two complementary approaches: a dynamic differential scheme and a sampling-predicting circuit.