Publication: Circuito de acondicionamiento de señales de ultrasonidos en la banda de MHz basado en el integrado AD9272
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2012-10
Defense date
2012-10-31
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Abstract
El presente proyecto se enmarca dentro del área de la instrumentación electrónica, más concretamente en la detección de señales de ultrasonidos dentro del rango de frecuencias de MHz y su aplicación en medidas no intrusivas. En este trabajo se ha desarrollado un sistema de instrumentación basado en el circuito integrado AD9272 de Analog Devices. Este módulo dispone de hasta 8 canales, los cuales están provistos de la electrónica necesaria para realizar el acondicionamiento de las señales entrantes. En primer lugar, se ha diseñado e implementado una placa de circuito impreso que incorpora dicho dispositivo, los circuitos auxiliares y las conexiones necesarias para realizar un sistema mínimo capaz de acondicionar un canal de ultrasonidos (amplificación, filtrado, conversión A/D y transmisión de señal). En segundo lugar se ha integrado con un módulo de adquisición e instrumentación virtual, y se ha realizado la caracterización del sistema completo. Finalmente, tras estudiar diversas aplicaciones posibles para el sistema implementado, se ha realizado una prueba de concepto emulando una de ellas. El experimento desarrollado simula el funcionamiento de un velocímetro de flujo utilizando ultrasonidos y el efecto Doppler. __________________________________________________________________________________________________________________________
This project falls within the area of electronic instrumentation, specifically it is focused on the detection of ultrasonic signals in the MHz frequency range and its application in non-intrusive measurements. In this work an instrumentation system based on the integrated circuit AD9272 from Analog Devices was developed. This module has up to 8 channels, which are provided with the functionalities for the electronic conditioning of the input signals. Firstly, a printed circuit board it´s been designed and implemented. It includes the integrated circuit device, the auxiliary circuits and the connections in order to perform a system which is able to condition one ultrasound channel (amplification, filtering, A/D conversion and signal transmission). Secondly, the printed circuit board it´s been interfaced with an acquisition module and virtual instrumentation, and it´s been performed the overall system characterization. Finally, after studying various possible applications for the implemented system, it´s been carried out a demonstration by emulating one of them. The developed experiment simulates the operation of a flow velocimeter using Doppler ultrasounds.
This project falls within the area of electronic instrumentation, specifically it is focused on the detection of ultrasonic signals in the MHz frequency range and its application in non-intrusive measurements. In this work an instrumentation system based on the integrated circuit AD9272 from Analog Devices was developed. This module has up to 8 channels, which are provided with the functionalities for the electronic conditioning of the input signals. Firstly, a printed circuit board it´s been designed and implemented. It includes the integrated circuit device, the auxiliary circuits and the connections in order to perform a system which is able to condition one ultrasound channel (amplification, filtering, A/D conversion and signal transmission). Secondly, the printed circuit board it´s been interfaced with an acquisition module and virtual instrumentation, and it´s been performed the overall system characterization. Finally, after studying various possible applications for the implemented system, it´s been carried out a demonstration by emulating one of them. The developed experiment simulates the operation of a flow velocimeter using Doppler ultrasounds.
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Keywords
Electrónica de instrumentación, Ultrasonidos, Circuitos integrados, Acondicionamiento analógico, Efecto Doppler