Device and method for tracking frequency of ultrasound knife

The invention provides a device and a method for tracking the frequency of an ultrasound knife, which solve the problems of low frequency tracking speed and low efficiency in the existing ultrasound equipment. The device comprises a processor, an FPGA (field programmable gate array) unit, a power supply module, an adjustable power supply module, a storage module, a display module, a sound module, a key and indication lamp module, a fault detection module, a safety detection module, a signal conditioning module, a power amplifying and output module, a control module, an ADC (analogue to digital converter) module I, an ADC module II, a voltage feedback module, a current feedback module and a piezoelectric transducer. The device has the advantages that the finding speed is fast, the operation efficiency is high, the continuously changed resonance frequency of the piezoelectric transducer system can be quickly tracked, and the piezoelectric transducer is enabled to be in resonance frequency state; the device can