Method for simulating an ultrasonic Doppler echo signal

Abstract

The invention discloses a method for simulating an ultrasonic Doppler echo signal. The simulating method is sequentially performed as follows: step 1, setting an ultrasonic wave emitted by an ultrasonic probe to be f(t)=cos(2*pi*f0*t), and storing the values of f(t) collected within K periods into a matrix x; step 2, a measured object moving in a radial direction relative to the ultrasonic probe,calculating according to a formula (3) to obtain a value of T2; step 3, setting the number of points required to be extracted in the ith period in the matrix x to be Ni, calculating according to the formula (4) to obtain Nsi, rounding off Nsi to obtain an integer Ni; step 4, in the matrix x, for the ith period, extracting Ni points in the sampling points of the current period averagely and puttingthe points into a matrix y sequentially; step 5, in a new coordinate system, using the obtained P f(t) values in the matrix y as a vertical coordinate and P tx as a horizontal coordinate to obtain Pcoordinate points, which are used as an ultrasonic Doppler echo signal. The method for simulating the ultrasonic Doppler echo signal in the invention has the advantages of high calculation efficiencyand being more intuitive.

Description

technical field [0001] The invention relates to the field of computer signal simulation, in particular to an ultrasonic Doppler echo signal simulation method. Background technique [0002] Since the 20th century, Doppler technology has been more and more widely used in the fields of communication and medicine. The verification of ultrasonic Doppler signal analysis method needs to use the simulated ultrasonic Doppler echo signal. The existing simulation method calculates It is complex and cannot intuitively and truly reflect the motion state of the measured object. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, based on the physical concept of wave front propagation, to provide a high computational efficiency and more intuitive ultrasonic Doppler echo signal simulation method. [0004] The present invention is achieved through the following technical solutions: [0005] A kind of ultrasonic Doppler...

AI Technical Summary

Problems solved by technology

[0002] Since the 20th century, Doppler technology has been more and more widely used in the fields of communication and medicine. The verification of ultrasonic Doppler signal analysis method needs to use the simulated ultrasonic Doppler echo signal. The existing simulation method calculates It is complex and cannot intuitively and truly reflect the motion state of the measured object

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