Ultrasonic professional dictionary construction and use method

Abstract

The invention provides an ultrasonic professional dictionary construction and use method. The method including constructing an ultrasonic professional dictionary and performing sparse decomposition on pulse ultrasonic signals with the constructed ultrasonic professional dictionary. By the ultrasonic professional dictionary, simplest expression of the ultrasonic signals can be obtained fast. Atom selection in the dictionary fully considers geometrical structure similarity of the pulse ultrasonic signals and atoms, and parameter setting, dispersion, search path, matching principles, optimizing principles and judging principles of the dictionary are obtained by pre-training the pulse ultrasonic signals. The dictionary further has a learning function, an atom library can be updated according to actual application conditions. By the method, the defects that current ultrasonic signal sparse decomposition is high in calculation complexity, and poor in time greediness and decomposition stability, and support is provided for application for medical ultrasonic detection and imaging fields, industrial and agricultural ultrasonic non-destructive detection fields and ultrasonic communication fields.

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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