Frequency control circuit and ultrasonic transducer system

Abstract

The invention relates to a frequency control circuit and an ultrasonic transducer system. The first signal processing module outputs the first signal to be detected through the signal collected by the voltage acquisition module, and the second signal processing module outputs the first signal to be detected through the current collected by the current acquisition module. The second signal to be detected is output, and the phase detection module outputs a detection result according to the first signal to be detected and the second signal to be detected, so that the processor changes the frequency of the excitation signal in the excitation signal source according to the detection result. Among them, since the first signal to be detected is in the same phase as the voltage, and the second signal to be detected is in the same phase as the current, the detection result is related to the phase of the voltage and current. When the voltage leads the current or the current leads the voltage, the excitation is changed according to the corresponding detection result. The frequency of the signal is used to reduce the difference between the natural frequency and the frequency of the excitation signal, so as to ensure that the ultrasonic transducer works under the highest efficiency condition.

Description

technical field [0001] The invention relates to the technical field of ultrasonic transducers, in particular to a frequency control circuit and an 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] Among them, the ultrasonic transducer itself has a fixed frequency. When the frequency of the excitation signal is consistent with its natural frequency, that is, when the ultrasonic transducer works at the resonant frequency, the convers...

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Problems solved by technology

[0005] Based on this, it is necessary for the traditional processor to run the program to judge the phase difference between the voltage and current after receiving the signal corresponding to the voltage and current in the excitation signal, which will affect the response speed of the processor and reduce the frequency of adjusting the excitation signal To solve the problem of efficiency, provide a frequency control circuit and ultrasonic transducer system

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