Integrated transmission and reflection ultrasound process tomography method
A process tomography, transmission technology, applied in the direction of material analysis, material analysis, instruments, etc. using sonic/ultrasonic/infrasonic waves, which can solve the problem of reducing the resolution of the convection pattern, and the single-mode reconstruction algorithm cannot judge the image segmentation threshold, etc. problems, to achieve the effect of increasing the amount of projection data, optimizing the image threshold, and reducing angiography
Active Publication Date: 2019-10-01
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology
One is that if the amount of projection data is limited, the original intensity images reconstructed by both have contrast, which reduces the resolution of the convective pattern
Second, when the original intensity image is subjected to precise binary segmentation processing, the single-mode reconstruction algorithm cannot judge the optimal image segmentation threshold
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[0028] Such as figure 1The structural schematic diagram of the integrated transmission and reflection ultrasonic process tomography system is shown. The system mainly includes three parts: a measurement area 100 , a multi-channel ultrasonic transmitting / receiving system 200 , and an image reconstruction and display system 300 . Wherein, the measurement area 100 is composed of a cylindrical pipe 110 and an array device 130 equipped with several ultrasonic transducers 120 . When the entire imaging system starts to work, a circular ring array device 130 composed of several ultrasonic transducers 120 is installed on a certain circular section of the cylindrical pipe 110 to be tested. The pipeline to be tested can be in other shapes, and the corresponding array device equipped with several ultrasonic transducers can also be designed according to the shape of the cross-sectional area of the pipeline, so as to ensure that the positional relationship between the pipeline to be teste...
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The invention relates to an integrated transmission and reflection type ultrasonic process chromatographic imaging method; compared with a single transmission or reflection type ultrasonic chromatographic technology, the obtained projection data size can be greatly increased in the premise of no increase of the number of transducers. Through comprehensive consideration of transmission wave peak value information and reflection wave transition time information, the region of a position where a target object appears is better restrained, so that the contrast of an original intensity image is greatly reduced, and the recognition resolution is improved; transmission type chromatographic imaging is used as an imaging basis, dual-mode reconstruction of the reflection image information is added, an image threshold can be optimized, and the position and size characteristics of a dynamic target can be continuously identified; the combination of the transmission information and the reflection information is different from other forms of multi-mode chromatographic imaging technologies, a specific form of ultrasonic waves is adopted, problems of requiring of mounting different measuring means of excitation sources, different acquisition devices and the like during integration cannot be met, and thus the integration level of the transmission and reflection type ultrasonic process chromatographic imaging system is greatly improved.
Description
technical field [0001] The invention relates to an ultrasonic process tomography, in particular to an integrated transmission and reflection ultrasonic process tomography method. Background technique [0002] The phase interface of two-phase flow, that is, the flow pattern, greatly affects the measurement accuracy of flow parameters. Real-time imaging analysis of process flow patterns plays a leading role in many industrial and scientific research fields. For example, the gas-liquid two-phase transportation in petroleum pipelines or the liquid-solid two-phase slurry transportation in the metallurgical industry, the measurement of related flow pattern parameters is extremely important for the cost accounting and quality monitoring of the flow process. [0003] In the field of process chromatography technology, ultrasonic has become one of the important methods for industrial process detection because of its good directionality, strong penetrating ability, no damage to the de...
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IPC IPC(8): G01N11/00G01N29/024
Inventor 顾建飞苏明旭田昌贾楠
Owner UNIV OF SHANGHAI FOR SCI & TECH