METHOD AND SYSTEM FOR DETERMINING THE STATE OF A SENSOR THROUGH A SUBSTRATE
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United States of America Patent
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Issued Date -
Jun 22, 2023
app pub date -
Dec 14, 2022
filing date -
Dec 17, 2021
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Abstract
A method for determining the state of at least one sensor, the method using a first electromechanical transducer and a second electromechanical transducer that are coupled to a substrate, and a non-linear electrical circuit connected between the second electromechanical transducer and the sensor, the method comprising the steps of: applying an electrical signal at a first amplitude to the terminals of the first electromechanical transducer, and determining a first set of values of a parameter characteristic of the electrical impedance of the first electromechanical transducer in response to the application of the electrical signal; applying the electrical signal at a second amplitude to the terminals of the first electromechanical transducer, and determining a second set of values of the parameter characteristic of the impedance; measuring a difference between the first set of values and the second set of values; determining a state of the sensor on the basis of the difference between the first set of values and the second set of values.
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