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An underwater target simulation system and method

A technology for underwater targets and simulation systems, applied to radio wave measurement systems, instruments, etc., can solve problems such as continuous echo simulation of non-moving targets

Active Publication Date: 2020-12-01
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0005] The present invention provides an underwater target simulation system and method, aiming to solve the problem in the prior art that continuous echo simulation cannot be performed on moving targets

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  • An underwater target simulation system and method
  • An underwater target simulation system and method
  • An underwater target simulation system and method

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Embodiment Construction

[0060] In order to better explain the present invention and facilitate understanding, the present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0061] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

[0062] In addition, in the present invention, descriptions such as "first", "second" and so on are used for description purposes only, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of indicated technical features. Thus, the features defined as "first" and "second" ma...

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Abstract

The invention relates to an underwater target simulation system which comprises a signal generation module, an underwater target device and an underwater sound receiving module, the signal generationmodule is used for continuously generating a combined signal [Sn Xn], converting the combined signal [Sn Xn] into a dual-band sound signal and outputting the dual-band sound signal, wherein the combined signal [Sn Xn] comprises a dual-band transmitting signal X(n), the frequency band of the dual-frequency-band transmitting signal X(n) comprises a first signal of which the frequency band is a firstfrequency band and a second signal of which the frequency band is a second frequency band, and the first frequency band is higher than the second frequency band; the underwater target device is usedfor obtaining an acoustic signal, filtering the acoustic signal to obtain a first signal located in the first frequency band, and generating an echo acoustic signal according to delay sampling of thefirst signal. According to the whole system, the dual-band sound signal is generated, after the underwater target device obtains the sound signal, a high-band signal is processed, a low-band sound signal is sent, and the problem that crosstalk is generated when the underwater target device receives and emits the sound signals at the same time is solved.

Description

technical field [0001] The invention relates to the technical field of underwater acoustic detection, in particular to an underwater target simulation system and method. Background technique [0002] At present, active sonar mainly adopts the pulse detection method. Since the propagation speed of sound waves in water is about 1500m / s, it is much lower than the propagation speed of electromagnetic waves in air. Generally speaking, the pulse repetition frequency of pulsed low-frequency active sonar is more than a thousand times slower than that of radar, and it often takes 15s to 60s to determine whether the target exists. The longer judgment time aggravates the influence caused by the time-varying and space-varying characteristics of the medium and the target, thereby reducing the accuracy of sonar discrimination. In recent years, continuous wave active sonar has received widespread attention in the field of underwater acoustic technology at home and abroad, and is consider...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/52
CPCG01S7/52004
Inventor 周泽民关承宇曾新吾
Owner NAT UNIV OF DEFENSE TECH
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