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Realization Method of Phased Array Ultrasonic Imaging Based on Elliptical Arc Scan Conversion

A technology of scan conversion and phased array, which is applied to the analysis of solids using sound waves/ultrasonic waves/infrasonic waves, material analysis using sound waves/ultrasonic waves/infrasonic waves, and processing detection response signals. It can solve problems that cannot be processed or applied to phased arrays. Ultrasound echo imaging and other issues

Active Publication Date: 2019-02-22
TSINGHUA UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

For the situation where the sending and receiving array elements are different, the algorithm cannot handle it, so it cannot be applied to phased array ultrasonic echo imaging

Method used

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  • Realization Method of Phased Array Ultrasonic Imaging Based on Elliptical Arc Scan Conversion
  • Realization Method of Phased Array Ultrasonic Imaging Based on Elliptical Arc Scan Conversion
  • Realization Method of Phased Array Ultrasonic Imaging Based on Elliptical Arc Scan Conversion

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Embodiment Construction

[0074] The concrete implementation process of the present invention comprises three parts (as Figure 4 ): Ultrasound data acquisition, imaging calculation and image display. The hardware platform system structure diagram is as follows: Figure 5 As shown, the ultrasonic imaging system is composed of a computer, a phased array probe, a phased array controller and an analog-to-digital converter, and the input end of the phased array controller is connected to the output end of the computer control signal , the input end of the phased array probe is connected with the output end of the phased array controller, the echo signal output end of the phased array is connected with the input end of the analog-to-digital converter, and the output end of the analog-to-digital converter is connected with the The echo sampling signal input end of the computer is connected.

[0075] The horizontal length of the measured object along the X-axis direction is M x , the number of one-dimensio...

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Abstract

A phased array ultrasonic echo imaging method based on elliptic arc scanning conversion belongs to the technical field of quick-ultrasonic echo imaging and is characterized in that through the elliptic arc scanning conversion technology, echo data acquired by each sending / receiving array element group in an existing time domain phased array is subjected to elliptic arc drawing operations; a target reflection object is the intersection point of a plurality of elliptic arcs, so that pixel values thereof are overlapped effectively and the overlapped pixel values are higher than the around pixels, thereby obtaining the position of the target reflection object. By means of the technical scheme, an imaging system formed by connecting a computer, a phased array probe and an A / D converter in series is configured. In data collection in each detection process, by means of the elliptic arc scanning conversion technology, structure of the elliptic arcs in a vertical section with the sending / receiving array elements as focuses is calculated, and finally, quick and accurate imaging on an ultrasonic reflection signal of the detected object is achieved.

Description

technical field [0001] The invention relates to ultrasonic non-destructive detection technology, ultrasonic imaging technology, phased array technology and ellipse scanning conversion technology, and realizes rapid and accurate imaging of object surface shape and internal structure. Background technique [0002] Ultrasonic phased array technology (Phased Array) is a new ultrasonic imaging technology in the field of ultrasonic non-destructive detection. Compared with a single transducer, phased array is more flexible and more sensitive to the surface shape and internal defects of objects, so it has been researched It has become a research hotspot in recent years and has been widely used in heavy industry, oil and gas pipeline, energy and aviation and other fields. [0003] The basic idea of ​​phased array technology is to use the pulse-echo (pulse-echo) measurement mechanism, using a set of ultrasonic phased array element (ultrasonic transducer) array, each time a phased arra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/06G01N29/26G01N29/44
CPCG01N29/069G01N29/262G01N29/4454G01N2291/0289G01N2291/106
Inventor 秦开怀崔文凯
Owner TSINGHUA UNIV