Resonant frequency detection method for Langevin type transducer based on neural network

Abstract

The invention relates to a resonant frequency detection method for a Langevin type transducer based on a neural network, which comprises the following steps of: firstly, extracting main influence factors influencing the resonant frequency of the transducer by adopting a transducer characteristic measurement module, and then inputting the main influence factors into a neural network detection module; enabling a neural network detection module to output a corresponding resonant frequency through calculation of a neural network, then combining a small number of transducers of different specifications to serve as sample data of neural network training, optimizing parameters of the neural network by adopting a particle swarm optimization algorithm, and further improving the precision of the output resonant frequency of the network. The method has the characteristics of low cost, high efficiency and high precision, and the resonant frequency at the moment can be detected in time when the resonant frequency of the transducer changes.

Description

technical field [0001] The invention relates to a method for detecting the resonant frequency of a transducer, in particular to a method for detecting the resonant frequency of a Langevin type transducer Background technique [0002] Ultrasonic transducers are energy conversion devices that convert alternating electrical signals into acoustic signals or convert acoustic signals into electrical signals within the ultrasonic frequency range. Control the power supply to apply an appropriate excitation frequency to make the transducer resonate as a whole. At this time The amplitude of the transducer will be significantly improved, the vibration will be relatively stable, and the energy conversion efficiency will be the highest. The frequency at which the transducer resonates is called the resonant frequency of the transducer. In an ideal state, the condition for the transducer to resonate is that the excitation frequency applied by the outside is equal to the natural frequency o...

AI Technical Summary

Problems solved by technology

[0004] At present, ultrasonic power supplies and transducers in the market are basically configured one-to-one. When replacing transducers with different resonant frequencies, the ultrasonic power supply cannot recognize the series resonant frequency of the new transducer and achieve dynamic matching; for transducers connected in series Theoretical research on resonant frequency is only limited to static parameter research and measurement, such research is not suitable for adaptive adjustment of ultrasonic power supply, which greatly limits the scope of use of ultrasonic power supply

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