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Online impedance measuring and dynamic matching system for ultrasonic transducer

An ultrasonic transducer and impedance measurement technology, which is applied in measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve problems such as poor success rate, high matching cost, and low electro-acoustic conversion efficiency, and achieve easy Implementation, high matching accuracy, and the effect of improving electro-acoustic conversion efficiency

Inactive Publication Date: 2019-04-09
NANJING UNIV
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  • Claims
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Problems solved by technology

[0008] In order to overcome the problems of high matching cost, poor success rate, and low electroacoustic conversion efficiency in the prior art, the present invention provides an online impedance measurement and dynamic matching system for ultrasonic transducers, in which the impedance measurement system and impedance matching The circuit can perform impedance measurement and real-time matching for the ultrasonic transducer in working state, so as to improve the electroacoustic conversion efficiency of the ultrasonic transducer

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  • Online impedance measuring and dynamic matching system for ultrasonic transducer
  • Online impedance measuring and dynamic matching system for ultrasonic transducer

Examples

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Embodiment 1

[0046] A kind of ultrasonic transducer online impedance measurement and dynamic matching system of the present embodiment, refer to figure 1 , the system includes a signal generator and an ultrasonic transducer 9, an impedance measurement system and an impedance matching circuit are arranged between the signal generator and the ultrasonic transducer 9, the impedance measurement system realizes online impedance measurement, and the impedance matching circuit is located at the signal Between the generator and the ultrasonic transducer 9, the impedance matching circuit also receives the measurement results of the impedance measurement system, and the impedance matching circuit is used for online impedance dynamic matching, and finally realizes the mutual cooperation between online impedance measurement and online impedance matching;

[0047] A single-chip microcomputer system and a driver module are also arranged between the signal generator and the ultrasonic transducer 9, and th...

Embodiment 2

[0051] An ultrasonic transducer online impedance measurement and dynamic matching system of this embodiment is based on Embodiment 1, referring to figure 1 , the impedance matching circuit, the single-chip microcomputer system and the drive module are arranged on the same circuit board carrier 4, so that the system structure is compact in design, the volume is reduced, and it is easy to carry.

Embodiment 3

[0053] An ultrasonic transducer online impedance measurement and dynamic matching system of this embodiment is based on Embodiment 1, referring to figure 1 , the computer-controlled acquisition system includes a computer and an acquisition system connected with the computer,

[0054] The computer can control the sampling frequency, sampling frequency and other sampling parameters of the oscilloscope through Lab VIEW. The user panel design is simple and easy to operate; the acquisition system is an oscilloscope, which can collect information according to actual needs and display the measured voltage and current waveforms in real time, which is convenient for users to intuitively Verify that the measurement process is performed correctly. The computer controls the oscilloscope to collect impedance measurement information. On the other hand, the computer can also be used to receive the measured voltage and current data in the whole system, process the data and calculate in real t...

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Abstract

The invention discloses an online impedance measuring and dynamic matching system for an ultrasonic transducer, and belongs to the technical field of impedance matching of the ultrasonic transducer. In order to overcome the problems of high matching cost, poor success rate and low electro-acoustic conversion efficiency in the prior art, the online impedance measuring and dynamic matching system for the ultrasonic transducer provided by the invention comprises a signal generator and the ultrasonic transducer; an impedance measuring system, an impedance matching circuit, a single chip microcomputer system and a driving module are disposed between the signal generator and the ultrasonic transducer; the impedance measuring system comprises a current probe, a voltage probe and a computer controlled collection system connected with the current prove and the voltage probe; the computer controlled collection system is connected with the single chip microcomputer system; the single chip microcomputer system is connected with the driving module; and the driving module is connected with the impedance matching circuit. According to the online impedance measuring and dynamic matching system provided by the invention, the impedance measuring and real-time matching can be performed on an ultrasonic transducer in a working state, and thus the electro-acoustic conversion efficiency of the ultrasonic transducer is improved.

Description

technical field [0001] The invention belongs to the technical field of impedance matching of ultrasonic transducers, in particular to an online impedance measurement and dynamic matching system of ultrasonic transducers. Background technique [0002] An ultrasonic transducer is a device that converts input electrical power into mechanical power and then transmits it out, while consuming a small part of the power itself. The impedance matching of the electrical end of the ultrasonic transducer is one of the important factors determining its electro-acoustic conversion efficiency. Usually, the ultrasonic transducer is driven by the signal source to realize the electric-acoustic conversion. The output impedance of the former and the characteristic impedance of the transmission line are generally purely resistive, while the latter is a reactive element. Direct driving will generate reflected power and increase the temperature of the transducer. , the electric-acoustic conversio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/08B06B1/06
CPCG01R27/08B06B1/06
Inventor 郭霞生霍丽莎金之阳章东
Owner NANJING UNIV
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