Method and system for finding resonant frequency point of transducer

Abstract

The present invention provides a method and system for finding the resonant frequency point of a transducer. The method includes the following steps that: S1, the minimum operating frequency and maximum operating frequency of the transducer are obtained; S2, a resonant frequency point preset value is set, a hop-up interval is formed with the maximum operating frequency and the resonant frequency point preset value, and a hop-down interval is formed with the resonant frequency point preset value and the minimum operating frequency; S3, if the current phase of the transducer exceeds the voltagephase of the transducer, a current interval hops to the hop-up interval, otherwise, the current interval hops to the hop-down interval; S4, a new hop-up interval and a new hop-down interval are formedwith two end point values of the current hop-up interval or current hop-down interval and corresponding intermediate point frequencies; and S5, if the current phase exceeds the voltage phase, a current interval hops to the new hop-up interval, otherwise, the current interval hops to the new hop-down interval, and the step S4 and step S5 are repeated, and the frequency of the transducer when the current phase and the voltage phase are the same is adopted as a resonance frequency point. With the method and system of the present invention adopted, the number of the times of finding can be greatly reduced through frequency hopping.

Description

[0001] This application is a divisional application based on the Chinese patent application submitted to the China Patent Office on May 9, 2013 with the application number 201310169366.7 and the title of the invention "Method and System for Finding the Resonant Frequency Point of a Transducer". technical field [0002] The invention relates to the technical field of transducers, in particular to a method and system for finding a resonance frequency point of a transducer. Background technique [0003] A typical ultrasonic transducer has a high quality factor and a steep resonance curve. Only when it works at its resonance frequency point can it have a large mechanical amplitude and high motor conversion efficiency. Therefore, the driving circuit of the ultrasonic transducer should be excited with its resonant frequency signal. [0004] After the equipment resonates, the operating frequency becomes larger and smaller within a certain range. Since the frequency range is determi...

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Problems solved by technology

[0007] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a method and system for finding the resonance frequency point of the transducer, which is used to solve the problem of slow speed and low efficiency in the prior art for finding the resonance frequency point of the transducer. question

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