Intelligent control technology of high-frequency ultrasonic system
In order to improve the low-power conversion problem caused by insufficient resonant frequency tracking performance of high-frequency ultrasonic systems,its adaptive processing ability is improved.An experimental platform is built around an ultrasonic transducer with known parameters,a predictive control model with the operating frequency and root mean square working current of the ultrasonic transducer as input parameters and the ultrasonic driving signal frequency as the output parameter is established and embedded in the microcomputer,the direct digital synthesis component is combined to form a control core to predict and control the driving signal frequency of the energy supply end in real time and track the resonant frequency of the output end.The experimental results show that the technology can effectively control the ultrasonic driving signal frequency and the relative error of the system tracking tuning accuracy is within 0.82％,the maximum output power error is 6.51％,and the average control time is 0.96 s,which significantly improves the system frequency tracking effect,and at the same time,the experimental method provides a reference that can effectively establish a predictive control model of high-frequency ultrasonic system.
High frequency ultrasound systemFrequency trackingPower controlIntelligent control algorithm
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