Underwater acoustic measurement method for scattering properties of ship target broadband radar

A technology of scattering characteristics and broadband radar, which is applied in the field of measurement of ship target broadband radar scattering characteristics, can solve the problems that the influence of electromagnetic characteristics of ship targets cannot be simulated, the measurement equipment and environmental requirements are too harsh, and achieve good realizability And operability, low cost, significant economic benefits

Inactive Publication Date: 2011-11-16
NAVAL UNIV OF ENG PLA
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Problems solved by technology

However, if a scale model measurement is to be performed on a large-volume target such as a ship, in order to maintain the invariance of the target electrical size, the working signal parameters must be enlarged or reduced according to the same ratio, which is too demanding for the measurement equipment and environment, and It cannot simulate the influence of the undulating sea environment on the electromagnetic characteristics of ship targets

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  • Underwater acoustic measurement method for scattering properties of ship target broadband radar
  • Underwater acoustic measurement method for scattering properties of ship target broadband radar
  • Underwater acoustic measurement method for scattering properties of ship target broadband radar

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Embodiment approach

[0038] Specific implementation methods, such as figure 1 As shown in Fig. 1, the underwater acoustic measurement process of ship target wideband radar scattering characteristics, first establish the basic conditions of the test: put the scaled model of the ship target under test upside down in the anechoic pool, adjust the transmitting transducer and receiving transducer The horizontal distance from the scale model of the ship target so that it satisfies the far-field conditions, while adjusting the depth of the transmitting and receiving transducers in the anechoic pool to meet the preset grazing angle of the transmitting beam , turn the scale model of the ship target to be measured to the direction to be measured;

[0039] Then simulate the water surface to produce the wave effect. In a specific embodiment, an electric fan is used to blow the water surface, and the blowing intensity of the interface is adjusted by controlling the number of fans and the blowing intensity to s...

specific Embodiment

[0043] Underwater acoustic measurement of ship target broadband radar scattering characteristics, that is, to obtain high-resolution range images of ship target, the specific implementation method adopted by the present invention is to set the size of the water pool according to the measured ship target model, and select the length, width and depth of the water pool to be selected as 10 respectively. meters, 4 meters, 1.8 meters or so. In order to simulate the real state of the surface ship target as much as possible, it is necessary to configure certain wave-making equipment in order to generate random undulating interface, random swing of the ship, and the multipath effect of the interface on propagation.

[0044] figure 2 Shown in is the schematic diagram of using the underwater acoustic measurement method to measure the broadband high-resolution range image echo of the ship target on the water surface. AFG320), high-frequency power amplifier (JYH100A), digital storage os...

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Abstract

The invention discloses an underwater acoustic measurement method for scattering properties of a ship target broadband radar, which is characterized by comprising the following steps of: firstly, inversely arranging a scaled model of a measured ship target in an anechoic tank, regulating basic conditions of a measurement device and a modeling test, simulating irregular sea waves at an interface between the scaled model of the ship target and water, amplifying a linear frequency demodulation signal generated by a signal source and radiating the amplified frequency demodulation signal in a sonic signal manner, amplifying and filtering an echo output signal reflected by the scaled model and then storing, then acquiring a plurality of groups of echo signal data on each rotating angle and then storing; and finally, processing the echo signals of the scaled model of the measured ship target on different rotating angles by adopting a pulse compression technology to obtain one-dimensional distance image data of the measured ship target. The invention overcomes the defects of rigorous requirements on measurement equipment and environment and incapability of measuring sea-surface target characteristics in the prior art, and has the advantages of flexibility in the measurement method, low cost, easiness in realization and the like.

Description

technical field [0001] The invention relates to a method for measuring the scattering characteristics of a ship target broadband radar, in particular to an underwater acoustic measurement method for the ship target broadband radar scattering characteristics. Background technique [0002] With the wide application of radar in military equipment, acquiring and analyzing the electromagnetic scattering characteristics of ship targets has become an important task in ship stealth design, ship detection and identification, etc. The radar scattering characteristics of a target are not only related to factors such as the size, shape, structure, waveform and frequency of the detection signal, but also related to factors such as the observation angle, the moving state of the target and the environment in which it is located. Therefore, it is self-evident to measure the radar scattering characteristics of various typical ship targets quantitatively, such as narrow-band RCS (radar scatte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/08G01S7/539
Inventor 席泽敏卢建斌张明敏
Owner NAVAL UNIV OF ENG PLA
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