Variable-frequency ultrasonic system based on digital pulse driving

Abstract

The invention relates to the technical field of ultrasonic applications, in particular to a variable-frequency ultrasonic system based on digital pulse driving. The system comprises an ultrasonic generator, an ultrasonic transducer and an ultrasonic wave field action groove, wherein the ultrasonic generator is a variable-frequency ultrasonic generator based on a DDS (Direct Digital Synthesis) technology, and comprises a power supply, a singlechip, a frequency generation module, a power amplification module, a PLL (Phase Locked Loop) frequency feedback module and an input-output module; the ultrasonic transducer is a transduction module consisting of a plurality of ultrasonic transduction units; each ultrasonic transduction unit comprises a piezoelectric sheet, conducting resin, a sound absorption material, a conducting post, a wiring board, a check ring and a housing; the ultrasonic transducer is fixed on a base, and electrically connected with the ultrasonic generator; and the ultrasonic wave field action groove is formed at the upper end of the ultrasonic transducer. The system is reasonable in design, and adopts the digital pulse driving; the frequency is automatically tracked, and is stepless and adjustable; the control is flexible; the power loss is low; the output is stable; and the system is suitable for various ultrasonic application environments.

Description

technical field [0001] The invention relates to the technical field of ultrasonic applications, in particular to a frequency-variable ultrasonic system driven by digital pulses. Background technique [0002] Ultrasonic generators are commonly referred to as ultrasonic electric boxes, ultrasonic generators, and ultrasonic power supplies. Its function is to convert our mains (220V or 380V, 50 or 60Hz) into a high-frequency AC signal that matches the ultrasonic transducer. [0003] The principle of the generator is to first generate a signal of a specific frequency by the signal generator. This signal can be a sinusoidal signal or a pulse signal. This specific frequency is the frequency of the transducer, which is generally used in ultrasonic equipment. Ultrasonic frequency 20KHz, 25KHz, 28KHz, 33KHz, 40KHz, 60KHz; 100KHz or above is not widely used yet. There are many ultrasonic generators on the market at present, but the principles and parameters are generally not much dif...

AI Technical Summary

Problems solved by technology

Manufacturers in the market seldom make this kind of ultrasonic generator, because even if they do, there is no frequency-adjustable transducer, which is of little significance

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