Frequency control circuit, method and device and ultrasonic transducer system

Abstract

The invention relates to a frequency control circuit, method and device and an ultrasonic transducer system; the frequency control circuit comprises a data acquisition unit connected with the output end of the excitation signal source and a processing unit connected with the data acquisition unit, and the processing unit is connected with the excitation signal source; the data acquisition unit isused for synchronously sampling the current and voltage output by the excitation signal source and transmitting the obtained current data and voltage data to the processing unit; the processing unit is used for performing FFT processing on the current data and the voltage data to obtain a data processing result, wherein the data processing result comprises a phase difference between the current and the voltage; and the processing unit is also used for comparing the phase difference with a preset phase difference and adjusting the driving frequency of the excitation signal in the excitation signal source according to a comparison result so as to match the resonant frequency of the ultrasonic transducer. According to the invention, the frequency of the excitation signal can be accurately adjusted in real time, the system requirement is reduced, the cost is saved, the structure is simple, and implementation is easy.

Description

technical field [0001] The present application relates to the technical field of ultrasonic transducers, in particular to a frequency control circuit, method, device and ultrasonic transducer system. Background technique [0002] An ultrasonic transducer is an energy conversion device that converts input electrical power into mechanical power (ie, ultrasonic waves) and then transmits it out. Ultrasonic transducers are widely used in various ultrasonic equipment, such as ultrasonic scalpels, ultrasonic welding machines or ultrasonic cleaning machines. The ultrasonic transducer in the ultrasonic equipment receives the AC excitation signal from the excitation signal source and converts it into mechanical energy to drive the corresponding working equipment. [0003] At present, the traditional technology adopts phase-locked loop and FPGA (Field-Programmable Gate Array, Field Programmable Gate Array) to control the frequency tracking of the ultrasonic transducer, but in the proc...

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Problems solved by technology

[0003] At present, the traditional technology adopts phase-locked loop and FPGA (Field-Programmable Gate Array, Field Programmable Gate Array) to control the frequency tracking of the ultrasonic transducer, but in the process of realization, the inventor found that there are at least the following problems in the traditional technology: traditional The technical circuit structure is complex and difficult to control

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