Frequency control circuit, method, device and ultrasonic transducer system

Abstract

The application relates to a frequency control circuit, method, device and ultrasonic transducer system; wherein, the frequency control circuit includes a data acquisition unit connected to the output end of the excitation signal source, a processing unit connected to the data acquisition unit, and the processing unit and The excitation signal source is connected; the data acquisition unit is used to synchronously sample the current and voltage output by the excitation signal source, and transmit the obtained current data and voltage data to the processing unit; the processing unit is used to perform FFT processing on the current data and voltage data , to obtain the data processing result; the data processing result includes the phase difference between the current and the voltage; the processing unit is also used to compare the phase difference with the preset phase difference, and adjust the driving frequency of the excitation signal in the excitation signal source according to the comparison result, to match the resonant frequency of the ultrasonic transducer. The application can accurately and real-time adjust the frequency of the excitation signal, reduce system requirements, save costs, and has a simple structure and is easy to implement.

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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