Method and device for initial parameter extraction of high-speed projectile echo signal
A technology for echo signal and parameter extraction, which is applied in radio wave measurement systems, climate sustainability, instruments, etc., and can solve the problems of cumbersome operation and low measurement accuracy.
Active Publication Date: 2022-05-17
ARMY ENG UNIV OF PLA
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[0004] In view of this, the embodiment of the present invention provides a method and device for extracting the initial parameters of the high-speed projectile echo signal, aiming to solve the problems of cumbersome operation and low measurement accuracy in the prior art when measuring the time when the projectile exits the chamber
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[0054]In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
[0055] In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.
[0056] figure 1 A schematic diagram of the implementation flow of the initial parameter extraction method of the high-speed projectile echo signal provided by the embodiment of the present invention. A radar for measuring the time of the bore is set at the preset distan...
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The present invention is applicable to the technical field of radar signal processing, and provides a method and device for extracting initial parameters of the echo signal of a high-speed projectile. The method includes: receiving the echo signal reflected when the projectile is ejected; Processing to obtain a two-dimensional time-frequency domain signal; calculating the short-term energy of each frame signal in the two-dimensional time-frequency domain signal, and calculating the short-term spectral entropy of each frame signal; according to the short-term energy of each frame signal and the product of the short-term spectral entropy of each frame signal to obtain the energy spectral entropy product of each frame signal; frame by frame detection of the energy spectral entropy product of each frame signal to determine the initial moment of the projectile signal. In this embodiment, the starting moment of the projectile signal can be accurately measured through the energy spectrum entropy product, and errors will not be accumulated among multiple projectiles.
Description
technical field [0001] The invention belongs to the technical field of radar signal processing, in particular to a method and device for extracting initial parameters of high-speed projectile echo signals. Background technique [0002] When the projectile is launched continuously at super high speed, due to the strong flame noise near the muzzle and the vibration of the barrel, the speed measuring radar does not directly measure the initial velocity of the projectile at the moment it exits the chamber, but by measuring the velocity of several points on the projectile's flight trajectory to extrapolate the data Get the initial velocity of the projectile at the moment of exiting the chamber. Therefore, the moment when the projectile exits the bore is one of the key parameters in the measurement of the initial velocity of the projectile, and its accuracy directly determines the measurement accuracy of the initial velocity of the projectile. The traditional methods for obtainin...
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IPC IPC(8): G01S7/40
CPCG01S7/4052Y02A90/10
Inventor 史林马俊涛张宏伟曾瑞胡文华黄欣鑫向凯全尹园威鞠锋刘贺雄
Owner ARMY ENG UNIV OF PLA