Ultrasonic transducer acoustoelectric closed-loop impedance measuring method and device

An ultrasonic transducer, ultrasonic energy conversion technology, applied in the direction of measuring devices, measuring resistance/reactance/impedance, measuring electrical variables, etc., can solve the problem that the impedance measuring device cannot be closed-loop measurement, etc., to achieve convenient construction and simple circuit configuration Effect

Inactive Publication Date: 2017-06-20
SOUTH CHINA UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0005] In order to overcome the inadequacies of existing impedance measurement devices that cannot perform closed-loop measurement in a wide freque

Method used

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  • Ultrasonic transducer acoustoelectric closed-loop impedance measuring method and device
  • Ultrasonic transducer acoustoelectric closed-loop impedance measuring method and device
  • Ultrasonic transducer acoustoelectric closed-loop impedance measuring method and device

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Embodiment Construction

[0025] This embodiment further describes the specific implementation manner of the present invention in conjunction with the accompanying drawings, but the implementation of the present invention is not limited thereto.

[0026] An acoustic-electric closed-loop impedance measurement device for an ultrasonic transducer includes a data processing background, a measurement sending module, an acoustic medium, and a measurement receiving module. The measurement receiving module, the measurement sending module and the data processing background communicate in a wireless manner. In this embodiment, the WIFI wireless communication technology is adopted.

[0027] Such as image 3 Shown is the ultrasonic transducer acoustic-electric closed-loop impedance measurement device, which includes a data processing background 301 , a measurement sending module 302 , a measurement receiving module 303 , an ultrasonic transducer 304 , and an acoustic medium 305 . In this embodiment, the impedanc...

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Abstract

The invention provides an ultrasonic transducer acoustoelectric closed-loop impedance measuring method and device. According to the method, in measurement, when an ultrasonic transducer is in an acoustoelectric conversion state, a transmitted broadband signal is converted into a sound signal through a transmitting ultrasonic transducer, the sound signal goes through an acoustic medium and is converted into an electric signal by a receiving ultrasonic transducer, and an acoustoelectric closed-loop measuring circuit from an electric signal to a sound signal and then to an electric signal is formed. Through calculating the acoustoelectric closed-loop channel response of a broadband range, through an equivalent circuit of the acoustoelectric closed-loop channel, the parameter of each element in an ultrasonic transducer closed-loop equivalent circuit is fitted, and thus the impedance of the ultrasonic transducer is obtained. The device comprises a data processing background, a measurement transmitting module, the acoustic medium, and a measurement receiving module. The device of the invention is simple, and a measurement result is the impedance of the ultrasonic transducer in the acoustoelectric conversion state and has a more practical reference value.

Description

technical field [0001] The invention belongs to the field of impedance measurement, in particular to an acoustic-electric closed-loop impedance measurement method and device for an ultrasonic transducer. Background technique [0002] Ultrasonic testing, as a high-precision, high-sensitivity non-destructive testing method, is increasingly used in various fields. Ultrasonic transducer is one of the key components, its performance directly affects the accuracy and reliability of detection. Usually before using the ultrasonic transducer, its various performance parameters must be measured, among which impedance is an essential item. First of all, in terms of circuit design, when the ultrasonic transducer works in a resonant state, the energy conversion efficiency is the highest, the heat generation is the least, and the life is longer; therefore, measuring the impedance of the ultrasonic transducer is helpful to design the drive with the best impedance matching circuit and loa...

Claims

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Application Information

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IPC IPC(8): G01R27/02
CPCG01R27/02
Inventor 韦岗周丽杨萃
Owner SOUTH CHINA UNIV OF TECH
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