The Construction and Application of Ultrasound Professional Dictionary

Abstract

The invention provides a construction and use method of an ultrasonic professional dictionary, including the construction of the ultrasonic professional dictionary and the sparse decomposition of pulsed ultrasonic signals by using the constructed ultrasonic professional dictionary. By using the ultrasonic professional dictionary, the most concise ultrasonic signal can be quickly obtained. Express. The selection of atomic classes in the dictionary fully considers the geometric similarity between the pulsed ultrasonic signal and the atomic class, and its parameter setting, discretization, search path, matching criterion, optimization criterion and judgment criterion are all obtained by pre-training the pulsed ultrasonic signal , the dictionary also has a learning function, which can update the atomic library according to the actual usage. The technical solution of the present invention can greatly change the disadvantages of high computational complexity, time greediness and poor decomposition stability in the sparse decomposition of ultrasonic signals, and can be used in the fields of medical ultrasonic detection and imaging, industrial and agricultural ultrasonic nondestructive testing and ultrasonic communication. applications provide support.

Description

technical field [0001] The invention relates to the technical field of analysis and processing of pulsed ultrasonic signals, in particular to a method for constructing and using an ultrasonic professional dictionary, which is suitable for sparse decomposition of pulsed ultrasonic signals. Background technique [0002] In recent years, the sparse decomposition of ultrasonic signals has become a new branch of research on ultrasonic signal processing. The sparse decomposition of ultrasonic signals can be used to express and reconstruct ultrasonic signals with a small number of coefficients, which greatly reduces the large number of problems brought about by the digitization of ultrasonic detection. Data, reduce its dependence on hardware performance and resources, break through the bottleneck of existing ultrasonic signal processing technology, and provide new perspectives and methods for ultrasonic signal processing. This technology can be widely used in ultrasonic signal nois...

AI Technical Summary

Problems solved by technology

[0005] The computational complexity of signal sparse decomposition algorithm is very high, and the amount of calculation is very huge, which can only be realized with the help of computer

In order to find the optimal or suboptimal matching atoms, the larger the atomic library, the more beneficial it is, which often results in a very large number of atoms in the library. Every time a decomposition is completed, the signal to be decomposed must be projected on each atom in the atomic library. And optimize and calculate the residual signal, so the calculation amount of the signal sparse decomposition algorithm is amazing

These deficiencies seriously restrict the popularization and application of this technology.

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