The ultrasonic detection imaging technology plays a very important role in many fields of modern industry and has a bright prospect of development.The development,principles,characteristics and applications of scan ultrasonic imaging,ultrasonic image display,ALOK imaging,phased array method,ultrasonic microscope,SAFT imaging,TOFD imaging and ultrasonic CT imaging are analyzed.This article can better guide the practical application of ultrasonic detection imaging technology.The development trend of it is pointed out.

Cracks, especially small cracks are difficult to be detected in oil and gas transportation pipelines buried underground or covered with layers of material by using the traditional ultrasonic inspection techniques. Therefore, a new composite ultrasonic transducer array with three acoustic beam incidence modes is developed. The space model of the array is also established to obtain the defect reflection point location. And the crack ultrasound image is thus formed through a series of small cubical elements expanded around the point locations by using the projection of binarization values extracted from the received ultrasonic echo signals. Laboratory experiments are performed on a pipeline sample with different types of cracks to verify the effectiveness and performance of the proposed technique. From the image, the presence of small cracks can be clearly observed, in addition to the sizes and orientations of the cracks. The proposed technique can not only inspect common flaws, but also detect cracks with various orientations, which is helpful for defect evaluation in pipeline testing.

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Imaging Technology of Ultrasonic Non-destructive Detection

Ultrasound Imaging of Pipeline Crack Based on Composite Transducer Array

With the rapid development of modern nondestructive testing technologies, ultrasonic phased array and Ultrasonic array testing technology has been used widely, at the same time the propagation process of ultrasonic in the material becomes more and more complex In order to make the ultrasonic propagation path become visible and researchers can observe the acoustic field directly, considering the properties of the ultrasonic as a stress wave, according to the theory of polarized light interference, a multi-channel dynamic photoelastic imaging system is developed successfully The system can generate many kinds of focusing ultrasonic fields in optical specimen by controlling the ultrasonic transmission delay time of each equipment channel, and the system has the ability to simulate the acoustic field’s focusing process of the ultrasonic phased array The image shot by CCD camera reflects the propagation process of the acoustic field in the specimen, and the dynamic video is formed under control of the timing circuit, and the system has the ability to save the captured image in the computer

Imaging Technology of Ultrasonic Non-destructive Detection

Citations

Ultrasound Imaging of Pipeline Crack Based on Composite Transducer Array

Application of multi-channel photoelastic imaging technology in array type ultrasonic nondestructive testing

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