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Two-dimensional scanning system for measuring sound fields

A two-dimensional scanning and sound field technology, applied in the field of two-dimensional scanning systems, can solve the problems of unfavorable feature signal extraction, unsuitable for solid sound field measurement, large volume, etc., and achieve the effect of combining sound field characteristics

Inactive Publication Date: 2013-09-04
HOHAI UNIV CHANGZHOU
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Problems solved by technology

[0003] The traditional sound field measurement is mainly carried out in water, and the underwater sound field is obtained through three-dimensional scanning, but this method is not suitable for solid sound field measurement
[0004] In addition, in production, the actual measurement objects are generally large in size, and there are a lot of noise and some uncertain factors in the measurement, which are not conducive to the extraction of characteristic signals

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  • Two-dimensional scanning system for measuring sound fields

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Embodiment Construction

[0016] In order to make the content of the present invention more clearly understood, the present invention will be further described in detail below based on specific implementation cases and in conjunction with the accompanying drawings.

[0017] like figure 1 As shown, a two-dimensional scanning system for measuring sound field is characterized in that the system includes:

[0018] Ultrasonic transducers for transmitting and receiving ultrasonic waves. The transmitting transducers are long piezoelectric ceramic sheets with a narrow width and a long length, which are usually attached to the middle of the workpiece so that the ultrasonic emission source approximates an ideal line source. . In this way, the reflection signal of the sound wave on the board to be tested can be as small as possible, so as to achieve the purpose of using the two-dimensional measurement method instead of the three-dimensional measurement. When measuring, the piezoelectric ceramic sheet can be pas...

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Abstract

The invention discloses a two-dimensional scanning system for measuring sound fields. The two-dimensional scanning system comprises an ultrasonic transducer for emitting and receiving ultrasonic, an ultrasonic transducer driving module, a step motor displacement module, a signal acquisition module, a microcontroller controlling and processing module for controlling the movement of a step motor with an ultrasonic transducer probe by programming and processing acquired data, and a communication module. The two-dimensional scanning system disclosed by the invention can be used for performing fixed point measurement on each point on the surface of a solid measurement sample, data measured by the two-dimensional scanning system are combined with sound field characteristics to extract the critical characteristics of a signal, and three-dimensional measurement is simulated by a two-dimensional measuring method to form a two-dimensional transmission image and a dynamic sound wave transmission animation of the sound field, thereby facilitating accuracy analysis on detecting signals and well visualizing the change of signals in an ultrasonic transmission process. The signals can be applied to related research and analysis.

Description

technical field [0001] The invention relates to a two-dimensional scanning system for measuring the sound field, which is used for measuring the detection of ultrasonic signals on the entire medium surface, and belongs to the field of acoustics and electronic communication. Background technique [0002] In recent years, ultrasonic nondestructive testing has gradually become the main testing method in the safety testing of major projects. In order to better analyze the detection signal, we need to extract the key features of the signal by combining the change law of the sound field in the detected medium and the propagation of the ultrasonic signal on the surface of the medium. Therefore, measuring the sound field and graphing it will be beneficial to our accurate analysis of the detection signal, and can also visualize the signal changes during the ultrasonic propagation process for related research and analysis. [0003] The traditional sound field measurement is mainly ca...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
Inventor 韩庆邦阮彦铭李建殷澄朱昌平李响
Owner HOHAI UNIV CHANGZHOU
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