Transducer driving system and method

Abstract

The invention discloses a transducer driving system which is used for driving a transducer to work. The transducer driving system comprises a signal generation module, an isolation amplification module, an inversion module, an impedance matching module, a capacitance voltage division module, a first voltage sampling module, a second voltage sampling module and a current sampling module. The signal generation module outputs a first pulse signal, the first pulse signal passes through the isolation amplification module and the inversion module to obtain a second pulse signal, the signal generation module outputs a first control signal to enable the impedance matching module to perform impedance matching on the transducer, and the signal generation module outputs a second control signal to control the capacitance voltage division module; the voltage at the two ends of the transducer is changed under the driving of the second pulse signal; and according to sampling signals of the first voltage sampling module, the second sampling module and the current sampling module, automatic impedance matching of the transducer is finally achieved, and then full-automatic driving of the transducer is achieved.

Description

technical field [0001] The invention relates to the field of piezoelectric transducer drive control, in particular to a transducer drive system and method. Background technique [0002] The generation of ultrasonic waves requires a transducer to work, converting electrical energy into mechanical energy. Ultrasonic transducers need to provide a voltage with a calibrated frequency when they are manufactured to work. At the same time, during the working process of the transducer, due to the influence of various factors, its impedance properties will change, and its resonance frequency will also drift. Therefore, the work of the transducer requires the precise cooperation of the drive power supply of the transducer in order to work smoothly. [0003] The ultrasonic transducer is made of metal-plated materials on the surface of piezoelectric ceramics, and its equivalent circuit model is as follows: figure 1 As shown, the electrical impedance is generally a complex impedance. T...

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Problems solved by technology

This method is relatively complicated, and has relatively high requirements for the excitation circuit and sampling circuit, and at the same time, the calculation amount is large, and it is difficult to realize automation.

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