Modeling and implementation of an analog front-end for piezoelectric ultrasonic sensors with built-in self-diagnostics
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Abstract
The article presents modern approaches to the design of the Analog Front-End (AFE) of sensor systems based on piezoelectric ultrasonic transducers with integrated (in-situ) self-diagnostic functionality. The relevance of the research is substantiated by the degradation of piezoelectric sensor characteristics under the influence of temperature variations, humidity, vibration, and radiation exposure. A method for modeling the sensor signal chain in the SPICE environment is proposed, together with design principles for adaptive-gain circuits and the implementation of self-diagnostic functions on a Programmable System-on-Chip (PSoC) platform. The obtained results improve the accuracy and stability of measurements and can be applied in the development of intelligent sensor systems for technical condition monitoring and environmental diagnostics.
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References
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