CN105911550A - Mine acoustic fuze target identification method - Google Patents

Mine acoustic fuze target identification method Download PDF

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Publication number
CN105911550A
CN105911550A CN201610205644.3A CN201610205644A CN105911550A CN 105911550 A CN105911550 A CN 105911550A CN 201610205644 A CN201610205644 A CN 201610205644A CN 105911550 A CN105911550 A CN 105911550A
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China
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target
mine
radiated noise
array element
identified
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CN201610205644.3A
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CN105911550B (en
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陈韶华
陈川
郑伟
田荣艳
汪小亚
佘湖清
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710th Research Institute of CSIC
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710th Research Institute of CSIC
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/74—Systems using reradiation of acoustic waves, e.g. IFF, i.e. identification of friend or foe

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

The invention discloses a mine acoustic fuze target identification method used for carrying out target identification for a mine platform. The method comprises steps that a target pitching angle and an azimuth angle are estimated; a target distance and the relative position are estimated according to the target pitching angle, the azimuth angle and depth of the mine platform; a sequence of position coordinates of the target relative to the mine platform within a set time segment is estimated through the method, according to the sequence, an expansion Kalman filtering method is employed, and a speed v of the target is acquired; a total sound level EL of target radiation noise is estimated, and a sound source level SL of the target radiation noise is estimated according to the EL; if SL/v is greater than the threshold 1, the target is identified as a mine sweeper; if the ratio is smaller than the threshold 2, the target is identified as a high-speed speedboat; if the ratio is smaller than the threshold 2 and greater than 1, the target is identified as a large-sized and medium-sized ship; and the thresholds1 and 2 are acquired through analyzing large-scale actually-measured target samples. The method employs characteristics of no-easy simulation and good stability to carry out target identification, and the better identification effect is realized.

Description

A kind of Mine acoustic fuse target identification method
Technical field
The invention belongs to Mine acoustic fuse field, be specifically related to a kind of Mine acoustic fuse target identification method.
Background technology
Submarine mine weapons target is accurately identified be submarine mine play fighting efficiency premise.The target type that naval mine detection is arrived Varied, including big-and-middle-sized naval vessel, small-sized speedboat and minesweeping gear etc..Existing document with patent more uses spectrum signature to know Other method, but current state-of-the-art goal setting formula acoustic minesweeping gear has been able to simulate Ship acoustic field spectrum structure, uses tradition Spectrum analysis technique be difficult to.Affected owing to frequency spectrum is interfered by ocean acoustic channel, to big-and-middle-sized naval vessel and small-sized speedboat Discrimination the most not ideal enough.
Summary of the invention
In view of this, the invention provides a kind of Mine acoustic fuse target identification method, use and be difficult to simulation, stability relatively Good feature carries out target recognition, has more preferable recognition effect.
In order to achieve the above object, the technical scheme is that a kind of Mine acoustic fuse target identification method, for water Thunder platform carries out target recognition, comprises the steps:
Step 1, estimation target pitch angle and azimuth.
The estimation of Depth target range of step 2, foundation target pitch angle and azimuth and submarine mine platform and relative position.
Step 3, estimated the sequence that sets the target in the time period relative to submarine mine position of platform coordinate by the method for step 2 Row, according to this sequence, use EKF method, obtain the speed of a ship or plane v of target.
Step 4, the overall level EL of estimation target radiated noise, and sound source level SL of target radiated noise is estimated according to EL.
If step 5 SL/v is more than thresholding 1, it is identified as minesweeping gear；Ratio is less than thresholding 2, is identified as racy speed boat；Ratio Value, between 2 threshold values, is identified as big-and-middle-sized naval vessel.
Thresholding 1 and thresholding 2 obtain by analyzing a large amount of actual measurement target sample.
Further, step 1 is adopted and is estimated target pitch angle and azimuth with the following method:
Formed equilateral plane trigonometry battle array by array element 1,2 and 3, be used for receiving target radiated noise, use general cross correlation Estimate that target radiated noise arrives the delay, τ between array element 1 and array element 221, and arrive the time delay between array element 1 and array element 3 τ31。
Target pitch angleWherein sin-1() is SIN function of negating, and C is water The middle velocity of sound, d is the length of side of plane trigonometry battle array.
Azimuth of targetWherein tan-1() is tan of negating.
Further, the target range r=h/cos θ in step 2；H is the degree of depth of submarine mine platform.
Target relative to the position coordinates of submarine mine platform is
Further, step 4 estimates the overall level EL of target radiated noise in the following way, and estimates target according to EL Sound source level SL of radiated noise: with the sampling interval T setsThe target radiated noise signal discrete receiving array element 1, obtains One data sequence s1(0),s1(2),...,s1(N-1), target radiated noise power is
Then target radiated noise overall level is EL=10lg (P)-Lr-Lm；Wherein, lg is denary logarithm, and P is mesh Mark radiated noise power, LrIt is the receiver sensitivity of array element 1, LmIt is the reception basic matrix sensitivity of array element 1.
Target radiated noise sound source level is SL=EL+20lgr.
Beneficial effect:
The present invention extracts target sound source level and speed of a ship or plane feature to identify target, and the two feature is big-and-middle-sized naval vessel, small-sized The tertiary targets such as speedboat and minesweeping gear are more stable and distinguish obvious feature.Advance is pulled under water such as minesweeping gear, Speed is the lowest.In order to reach the biggest minesweeping width, improving minesweeping efficiency, the power of its acoustical generator is the highest, reaches very High sound source level, sound source level is the biggest with speed of a ship or plane ratio.Small-sized speedboat maneuverability, the speed of a ship or plane is the highest, and sound source level is higher, sound source level with Speed of a ship or plane ratio is less.It is higher that speed is normaled cruise on big-and-middle-sized naval vessel, but less than speedboat, sound source level is the highest, sound source level and the speed of a ship or plane Ratio is bigger.These features, compared with spectrum signature, are difficult to simulation, and stability is preferable, has more preferable recognition effect.
Accompanying drawing explanation
Fig. 1 target recognition process schematic
Fig. 2 planar array measures the angle of pitch and azimuth schematic diagram
Fig. 3 is by the angle of pitch and estimation of Depth target range
The target sound source level that Fig. 4 estimates, after 400s, target occurs；
The target speed of a ship or plane that Fig. 5 estimates, after 400s, target occurs.
Detailed description of the invention
Develop simultaneously embodiment below in conjunction with the accompanying drawings, describes the present invention.
A kind of Mine acoustic fuse target identification method, carries out target recognition for submarine mine platform, and flow process is as shown in Figure 1.
The method specifically includes following steps:
Step 1, estimation target pitch angle and azimuth；
In the present embodiment, step 1 is as in figure 2 it is shown, adopt and estimate target pitch angle and azimuth with the following method:
Formed equilateral plane trigonometry battle array by array element 1,2 and 3, be used for receiving target radiated noise, use general cross correlation Estimate that target radiated noise arrives the delay, τ between array element 1 and array element 221, and arrive the time delay between array element 1 and array element 3 τ31。
Target pitch angleWherein sin-1() is SIN function of negating, and C is water The middle velocity of sound, d is the length of side of plane trigonometry battle array.
Azimuth of targetWherein tan-1() is tan of negating.
The estimation of Depth target range of step 2, foundation target pitch angle and azimuth and submarine mine platform and relative position.
In the present embodiment, as it is shown on figure 3, target range r=h/cos θ；H is the degree of depth of submarine mine platform；
Target relative to the position coordinates of submarine mine platform is
Step 3, estimated the sequence that sets the target in the time period relative to submarine mine position of platform coordinate by the method for step 2 Row, according to this sequence, use EKF method, obtain the speed of a ship or plane v of target；It is illustrated in figure 5 the target boat of estimation Speed, after 400s, target occurs.
Step 4, the overall level EL of estimation target radiated noise, and sound source level SL of target radiated noise is estimated according to EL.
In the present embodiment, step 4 estimates the overall level EL of target radiated noise in the following way, and estimates mesh according to EL Sound source level SL of mark radiated noise: with the sampling interval T setsThe target radiated noise signal discrete that array element 1 is received, To a data sequence s1(0),s1(2),...,s1(N-1), target radiated noise power is
Then target radiated noise overall level is EL=10lg (P)-Lr-Lm；Wherein, lg is denary logarithm, and P is mesh Mark radiated noise power, LrIt is the receiver sensitivity of array element 1, LmIt is the reception basic matrix sensitivity of array element 1.
Target radiated noise sound source level is SL=EL+20lgr.It is illustrated in figure 4 the target sound source level of estimation, mesh after 400s Mark existing.
If step 6, SL/v SL/v are more than thresholding 1, it is identified as minesweeping gear；Ratio is less than thresholding 2, is identified as the fastest Ship；Ratio, between 2 threshold values, is identified as big-and-middle-sized naval vessel；
Thresholding 1 and thresholding 2 obtain by analyzing a large amount of actual measurement target sample.It is tertiary target recognition result as shown in table 1.
Table 1 tertiary target recognition result
Type Sample number Correctly identify sample number Discrimination
Big-and-middle-sized naval vessel 15 14 93.3%
Speedboat 35 31 88.6%
Minesweeping gear 30 26 86.7%
To sum up, these are only presently preferred embodiments of the present invention, be not intended to limit protection scope of the present invention.All Within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included in the protection of the present invention Within the scope of.

Claims (4)

1. a Mine acoustic fuse target identification method, carries out target recognition for submarine mine platform, it is characterised in that include as follows Step:
Step 1, estimation target pitch angle and azimuth；
The estimation of Depth target range of step 2, foundation target pitch angle and azimuth and submarine mine platform and relative position；
Step 3, estimate to set the target in the time period by the method for step 2 relative to the sequence of submarine mine position of platform coordinate, depend on According to this sequence, use EKF method, obtain the speed of a ship or plane v of target；
Step 4, the overall level EL of estimation target radiated noise, and sound source level SL of target radiated noise is estimated according to EL；
If step 5 SL/v is more than thresholding 1, it is identified as minesweeping gear；Ratio is less than thresholding 2, is identified as racy speed boat；Ratio is situated between Between 2 threshold values, it is identified as big-and-middle-sized naval vessel；
Thresholding 1 and thresholding 2 obtain by analyzing a large amount of actual measurement target sample.
2. a kind of Mine acoustic fuse target identification method as claimed in claim 1, it is characterised in that described step 1 uses such as Lower method estimation target pitch angle and azimuth:
Formed equilateral plane trigonometry battle array by array element 1,2 and 3, be used for receiving target radiated noise, use general cross correlation to estimate Target radiated noise arrives the delay, τ between array element 1 and array element 221, and arrive the delay, τ between array element 1 and array element 331；
Target pitch angleWherein sin-1() is SIN function of negating, and C is sound in water Speed, d is the length of side of plane trigonometry battle array；
Azimuth of targetWherein tan-1() is tan of negating.
3. a kind of Mine acoustic fuse target identification method as claimed in claim 2, it is characterised in that the mesh in described step 2 Subject distance r=h/cos θ；H is the degree of depth of submarine mine platform；
Target relative to the position coordinates of submarine mine platform is
4. a kind of Mine acoustic fuse target identification method as claimed in claim 3, it is characterised in that described step 4 uses such as Under type estimates the overall level EL of target radiated noise, and estimates sound source level SL of target radiated noise according to EL: with set Sampling interval TsThe target radiated noise signal discrete receiving array element 1, obtains a data sequence s1(0),s1(2),..., s1(N-1), target radiated noise power is
Then target radiated noise overall level is EL=10lg (P)-Lr-Lm；Wherein, lg is denary logarithm, and P is target spoke Penetrate noise power, LrIt is the receiver sensitivity of array element 1, LmIt is the reception basic matrix sensitivity of array element 1；
Target radiated noise sound source level is SL=EL+20lgr.
CN201610205644.3A 2016-04-05 2016-04-05 A kind of Mine acoustic fuse target identification method Expired - Fee Related CN105911550B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112815790A (en) * 2020-12-31 2021-05-18 中国船舶重工集团有限公司第七一0研究所 Vertical mooring active attack mine target information transmission and synchronization method

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US4189999A (en) * 1956-03-05 1980-02-26 The United States Of America As Represented By The Secretary Of The Navy Vector acoustic mine mechanism
US4215630A (en) * 1978-03-06 1980-08-05 General Dynamics Corporation Pomona Division Anti-ship torpedo defense missile
CN101470194A (en) * 2007-12-26 2009-07-01 中国科学院声学研究所 Torpedo target recognition method
CN101644768A (en) * 2008-12-30 2010-02-10 中国科学院声学研究所 Torpedo target recognition method based on cepstrum analysis
US20110242939A1 (en) * 2010-04-06 2011-10-06 Raytheon Company Active sonar system and active sonar method using a pulse sorting transform

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Publication number Priority date Publication date Assignee Title
US4189999A (en) * 1956-03-05 1980-02-26 The United States Of America As Represented By The Secretary Of The Navy Vector acoustic mine mechanism
US4215630A (en) * 1978-03-06 1980-08-05 General Dynamics Corporation Pomona Division Anti-ship torpedo defense missile
CN101470194A (en) * 2007-12-26 2009-07-01 中国科学院声学研究所 Torpedo target recognition method
CN101644768A (en) * 2008-12-30 2010-02-10 中国科学院声学研究所 Torpedo target recognition method based on cepstrum analysis
US20110242939A1 (en) * 2010-04-06 2011-10-06 Raytheon Company Active sonar system and active sonar method using a pulse sorting transform

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112815790A (en) * 2020-12-31 2021-05-18 中国船舶重工集团有限公司第七一0研究所 Vertical mooring active attack mine target information transmission and synchronization method

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