Ultrasonic driving power supply for automatically tracking series resonance frequency of transducer

A series resonance, driving power technology, applied in the fluid, electrical measuring instrument parts, instruments and other directions that use vibration, can solve the problem of frequency tracking of transducers, there is no good solution, the filter can not meet the requirements of use, dynamic Resistance has a huge influence and other problems, so as to improve the accuracy of phase detection, realize digital frequency control, and avoid frequency drift.

Active Publication Date: 2020-01-17
TIANJIN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

A typical frequency tracking system is implemented in a phase-locked manner. However, there has been no good solution to the frequency tracking problem of the transducer due to the following reasons
[0005] (3) It is a common method to use a matching network to tune the transducer so that the resonant frequency of the transducer is consistent with the series resonant frequency. The matching methods are divided into dynamic matching and static matching. Dynamic matching has complex systems and operations Difficulty, low degree of automation, etc., while the static matching parameters are calculated from the transducer parameters, which are greatly affected by the dynamic resistance. When the load chan

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  • Ultrasonic driving power supply for automatically tracking series resonance frequency of transducer
  • Ultrasonic driving power supply for automatically tracking series resonance frequency of transducer
  • Ultrasonic driving power supply for automatically tracking series resonance frequency of transducer

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Embodiment Construction

[0053] In order to overcome the above-mentioned shortcomings of the prior art, the present invention aims at the characteristics of the piezoelectric ultrasonic transducer, and on the basis of the existing separately excited ultrasonic power supply, designs a driving power supply with dual current sampling and precise frequency control, and A real-time tracking method for the series resonance frequency of the transducer is proposed, and an ultrasonic drive power supply that automatically tracks the series resonance frequency of the transducer is realized.

[0054] The technical scheme adopted by the present invention is an ultrasonic driving power supply for automatically tracking the series resonance frequency of the transducer, which includes the following four parts;

[0055] The first part is the drive circuit, such as figure 1 As shown, it includes a PWM wave generating circuit and a half-bridge inverter circuit 6 . The PWM (PulseWidth Modulation) wave generation unit is...

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Abstract

The invention relates to the technical field of ultrasound and power supply, and provides a driving power supply with double-channel current sampling and precise frequency control functions, and a real-time tracking method of the series resonance frequency of a transducer, in order to realize an ultrasonic driving power supply for automatically tracking the series resonance frequency of the transducer. The ultrasonic driving power supply for automatically the tracking series resonance frequency of the transducer provided by the invention comprises the following four parts, that is, the first part is a driving circuit; the second part is a sampling matching circuit; the third part is a signal conditioning circuit; and the fourth part is a micro-control module that is composed of a microprocessor. The ultrasonic driving power supply provided by the invention is mainly applied to the design and manufacturing occasions of frequency-controlled power supplies.

Description

technical field [0001] The invention relates to the technical field of ultrasound and power supply, in particular, to an ultrasonic driving power supply for automatically tracking the series resonance frequency of a transducer. Background technique [0002] Power ultrasound has important applications in ultrasonic machining, ultrasonic casting, ultrasonic welding, ultrasonic cleaning and other fields. The driving power supply of ultrasonic transducer is an important part of the power ultrasonic system, and its key technology is to track the frequency of the transducer. A typical frequency tracking system is implemented in a phase-locked manner. However, due to the following reasons, there has been no good solution to the frequency tracking problem of the transducer. [0003] (1) The piezoelectric ultrasonic transducer itself has multiple characteristic frequencies, including resonant frequency, anti-resonant frequency, series resonant frequency, parallel resonant frequency,...

Claims

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Application Information

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IPC IPC(8): G01R19/25G01R1/28B06B3/00B06B1/06G05B19/042
CPCB06B1/06B06B3/00G01R1/28G01R19/25G05B19/0423
Inventor 王金栋段发阶蒋佳佳彭呈祥黄婷婷李秀明
Owner TIANJIN UNIV
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