A Graphical Estimation Method of Optimal Probing Frequency under Array Size Constraint
A graphical and dimensional technology, applied in measurement devices, re-radiation of sound waves, radio wave measurement systems, etc., can solve problems such as the inability to visually see the trend of detection distance changes
Active Publication Date: 2021-04-13
CSSC SYST ENG RES INST
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[0017] Although the above method can effectively solve the maximum detection distance of the basic array when the working frequency is f, this method needs to solve the equation repeatedly to calculate the detection distance at each frequency, and cannot intuitively see the change trend of the detection distance with different frequencies
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[0061] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments disclosed in the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0062] refer to figure 1 , shows a graphical estimation method of optimal detection frequency under the constraint of array size in an embodiment of the present invention. In this embodiment, the optimal detection frequency graphical estimation method under the constraint of array size includes:
[0063] Step 101, obtaining initial parameters.
[0064] In this embodiment, the initial parameters may specifically include: planar array length L, planar array width K, transducer emission voltage S v , the effective value U of the emission voltage at both ends of the transducer, the sonar detection threshold DT, the background noise level NL of the marine environment, and the target strength TS.
[0065] In this embodiment, the size of t...
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The invention discloses a method for graphically estimating the optimal detection frequency under the constraint of array size, comprising: obtaining initial parameters; obtaining a working frequency set, and determining the absorption coefficient set corresponding to the working frequency set; determining the expression of the constant threshold C and Working frequency f i The frequency-distance correlation function y when i : Carry out graphical processing, and draw the frequency-distance correlation curve Y within the distance range r in sequence i , and, draw the straight line of the constant threshold C; and determine the straight line of the constant threshold C and the frequency-distance correlation curve Y i intersection point P i (r i ,C); solve to get the set [r 1 ,r 2 ,...,r i ,...,r w ] within the maximum r p , and determine the operating frequency f p is the optimal operating frequency of the sonar. By drawing the curve and the constant threshold, the present invention can intuitively obtain the detection distance of the array under different working frequencies, and can intuitively see the change trend of the detection distance with the frequency, and obtain the optimal working frequency in the range of different constant thresholds.
Description
technical field [0001] The invention belongs to the technical field of underwater acoustics, and in particular relates to a graphical estimation method for optimal detection frequency under the constraint of array size. Background technique [0002] With the development of underwater acoustic technology, more and more underwater platforms are equipped with acoustic sensor arrays for target detection. Generally speaking, the larger the aperture of the sensor array, the longer the detection distance. That is to say, the constraint of the platform size limits the detection distance of the array. [0003] In the reliable operating frequency band of the acoustic sensor, under the constraints of the platform size, the higher the acoustic frequency, the more array elements can be deployed. However, high-frequency acoustic waves will cause greater absorption loss. Therefore, only a scientific choice of operating frequency Only in this way can the maximum detection distance of the a...
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IPC IPC(8): G01S15/08
CPCG01S15/08
Inventor 张驰唐建生张立琛张晓亮
Owner CSSC SYST ENG RES INST