Intelligent frequency sweeping method of ultrasonic signal generator

Abstract

The invention relates to an intelligent frequency sweeping method of an ultrasonic signal generator. The intelligent frequency sweeping method is used for connecting the ultrasonic signal generator with N ultrasonic transducers, wherein N is a natural number greater than or equal to two. The intelligent frequency sweeping method comprises the following steps that step 1, parameters are preset, wherein starting frequency of frequency sweeping is f<start>, stopping frequency is f<stop>, frequency sweeping interval is f<step>, pre-sweping times are N<init>, relative frequency difference is RFD, relative frequency step is RFS, and relative frequency step rate is k; step 2, initial pre-scanning is carried out, N<init> times of linear frequency scanning are carried out from the f<start> to the f<stop>, natural vibration frequency of the connected N ultrasonic transducers is detected, and the natural vibration frequency of the N ultrasonic transducers is arranged in an ascending order; and step 3, intelligent frequency sweeping is carried out, according to the relative frequency difference between adjacent natural vibration frequency f and f<i+1>, linear frequency sweeping with segmented unequal frequency steps is carried out. Compared with the prior art, the intelligent frequency sweeping method has the advantages that frequency matching driving to a plurality of transducers can be conducted sequentially, and the problem of frequency mismatching during the ultrasonic signal generator driving the transducers simultaneously is solved.

Description

technical field [0001] The invention relates to an intelligent frequency sweep method of an ultrasonic signal generator. Background technique [0002] The existing ultrasonic signal generators can basically be divided into two categories: fixed frequency driven ultrasonic signal generators and intelligent frequency tracking ultrasonic signal generators. The ultrasonic signal generator driven by a fixed frequency, sets the corresponding parameters of the ultrasonic signal generator according to the predicted characteristic parameters of the transducer, so that it can generate a driving signal of a certain fixed frequency to drive the transducer to output a large ultrasonic power or output a fixed frequency of ultrasound. The ultrasonic signal generator with intelligent frequency tracking can detect the real-time working state parameters of the transducer, adaptively adjust the frequency of the driving signal to track the change of the natural frequency of the transducer, so ...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing ultrasonic transducers are made of piezoelectric ceramics. Due to the subtle differences in the materials and the incomplete consistency of the processing technology, even the ultrasonic transducers produced in the same batch will have obvious differences in their natural vibration frequencies. , and its natural vibration frequency will drift with the change of working conditions in the actual use process

For an ultrasonic signal generator driven by a fixed frequency, when its working parameters are set, its driving frequency is fixed and cannot flexibly adapt to the vibration frequency of each transducer

For the ultrasonic signal generator with intelligent frequency tracking, although the frequency of its output driving signal can intelligently track the change of the natural frequency of the ultrasonic transducer, its intelligent tracking scheme is designed according to the characteristic index of a transducer However, it cannot meet the requirements of tracking and driving multiple ultrasonic transducers at the same time

Images