Ultrasonic phased array defect imaging method based on F-DMAS and pseudo color

A F-DMAS, ultrasonic phased array technology, applied in the direction of material analysis, image enhancement, image analysis, etc. using sonic/ultrasonic/infrasonic waves, can solve problems such as dependence, difficulty in identifying defects in false color images, and achieve the advantage of detection capabilities , the advantage of expression effect, the effect of improving expression effect
CN114187291AActive Publication Date: 2022-03-15CENT SOUTH UNIV
4 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2022-03-15

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides an ultrasonic phased array defect imaging method based on filtering delay multiply-accumulate (F-DMAS) and CMYK pseudo-color, and introduces an automatic color image segmentation technology to detect defects in a strong attenuation material. The method comprises the following steps: firstly, performing post-processing on full matrix capture (FMC) data by adopting an F-DMAS algorithm; then, the influence of frequency component selection on F-DMAS imaging is analyzed, and the influence of attenuation on defect echoes is discussed. Thirdly, separating frequency components of the signals by using a pseudo-color technology, and generating a color image with frequency and intensity information, so as to improve the information amount of the ultrasonic image and the expression effect of defects; and finally, performing color image segmentation and edge detection on a pseudo-color imaging result to realize automatic extraction of a defect contour. Compared with a linear full-focusing imaging method, the method provided by the invention has remarkable advantages in the aspects of signal-to-noise ratio, detection capability, expression effect and the like of defects.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of ultrasonic detection, in particular to an ultrasonic phased array imaging method for defects in strong attenuation materials based on F-DMAS and false color. Background technique

[0002] Ultrasonic phased array imaging is widely used in the field of industrial and medical non-destructive testing. However, when ultrasonic waves propagate in strong attenuating materials such as coarse grains or particle composites, severe energy loss will result due to scattering attenuation and absorption attenuation. Internal defects in these strongly attenuating materials are difficult to detect with traditional ultrasonic phased array imaging methods. Because the defect echo signal will be severely attenuated in strong attenuation materials, the imaging results may be submerged in electrical noise or structural noise, resulting in a low signal-to-noise ratio, which seriously affects the effective identification of def...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More