CN110261888A - A kind of the fast sound-light detection device and detection method of mine - Google Patents
A kind of the fast sound-light detection device and detection method of mine Download PDFInfo
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- CN110261888A CN110261888A CN201910260517.7A CN201910260517A CN110261888A CN 110261888 A CN110261888 A CN 110261888A CN 201910260517 A CN201910260517 A CN 201910260517A CN 110261888 A CN110261888 A CN 110261888A
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- land mine
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/001—Acoustic presence detection
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
- G01V8/12—Detecting, e.g. by using light barriers using one transmitter and one receiver
- G01V8/14—Detecting, e.g. by using light barriers using one transmitter and one receiver using reflectors
Abstract
The present invention is the fast sound-light detection device and detection method of a kind of mine, and signal generator is sequentially connected sound console, balancer, power amplifier and loudspeaker by data line；CCD camera is sequentially connected image pick-up card and computer by data line；Beam expanding lens, reflecting mirror and CCD camera are adjusted and are fixed；Land mine to be measured is embedded in sandy soil；The sounding port face of loudspeaker is buried into region and issues high-intensitive sinusoidal sound wave；Utilize the speckle image that land mine region to be measured is buried by the sequentially connected CCD camera of data line, image pick-up card and computer acquisition；The amplitude information with demodulated interferential bar graph is calculated by Matlab software and draws out 3-D image, and wherein amplitude larger part indicates to bury land mine to be measured.The present invention realizes the non-cpntact measurement of the high-precision of mine, the quick whole audience.
Description
Technical field
The present invention relates to mine detection technical field, the fast sound-light detection device and detection of especially a kind of mine
Method is the detection device and method of land mine optical imagery quick detection in the research of acoustic detection land mine.
Background technique
The safely effectively detection of mine is a worldwide problem.Common low frequency metal detector
Based on electromagnetic induction principle, the less nonmetallic mine of tenor can not be effectively detected in detection mechanism, reliability is low, and
And since it is sensitive to metal clips, there are false alarm rates it is higher, detection efficient is low the problems such as.Other such as ground penetrating radar explorations,
The imaging techniques such as infra-red thermal imaging mine-detecting technique, X-ray mine-detecting technique, signal processing time is long, and recognition accuracy is poor, can not
Effectively differentiate the type of land mine, fragment, stone or other treasure troves；Some non-imaged technologies, such as neutron mine-detecting technique, nuclear power four
Polar moment resonate mine-detecting technique, by detection land mine in explosive nucleic reaction or nuclear resonance signal identify land mine, have compared with
High detectivity and speed of detection, but its system complex, expensive, detection signal is weaker, and will receive the interference of electromagnetic field, away from
From the practical stage there are also with a certain distance from.In addition, biological formula detecting a mine method (detect a mine careless and detect a mine luminous by such as detecting a mine honeybee, detecting a mine dog
Bacterium etc.) also in exploration and experimental stage, although the lower reliability of false alarm rate is poor.
Acoustic resonance mine-detecting technique based on land mine mechanical property illustrates good detection prospect, and wherein the sound and vibration of land mine is special
Property be measure land mine mechanical property an important feature.The geometric dimension of land mine and common buried depth, determine ground
The resonant frequency for the resonator system that buried soil above Lei Yuqi is constituted is in low-frequency range, and land mine is constituted out with necromancer earth thereon
For resonator system in acoustic wave excitation and in the case where resonate, it is special that the vibration of the thunder body cover of land mine can show specific sound and vibration
Property, and influence the specific vibrational state of earth's surface.Therefore, it can be used for sound wave identification burial ground by detecting the sound vibration characteristic of land mine
The research of thunder.
Lack commercial or dedicated mine fast sound-light detection device, the quick sound of typical mine at present
Light detection device should include sound wave emitting portion, the acquisition of optics vibration measuring part and data and processing unit.Currently, in sound wave
There is commercial product in terms of emission system, but lacks and be applied in combination with mine；There is special equipment in optics vibration measuring part, but
Structure is complicated, and measuring speed cannot achieve the contact detection of the large area whole audience compared with slow, more by environmental restrictions factor；In number
There is special equipment in terms of according to acquisition and processing unit, but Image Acquisition effect is poor, image information is difficult to demodulate.The present invention is exactly
It is unfolded for this key technology.
Summary of the invention
It is an object of the invention to overcome the fast sound-light detection device etc. that there is no dedicated mine at present
Problem, the fast sound-light detection device for providing a kind of mine and detection method are, it can be achieved that the high-precision of mine, fast
The fast whole audience and non-cpntact measurement.
In order to achieve the above objectives, the present invention adopts the following technical solutions:
A kind of fast sound-light detection device of mine, including signal generator, sound console, balancer, power amplification
Device, loudspeaker, semiconductor laser, beam expanding lens, reflecting mirror, CCD camera, image pick-up card and computer；The signal occurs
Device is sequentially connected the sound console, the balancer, the power amplifier and the loudspeaker by data line；The CCD
Camera is sequentially connected described image capture card and the computer by data line；The beam expanding lens and the reflecting mirror pass through solid
Determine device to fix.
Using above-mentioned measuring device, a kind of fast sound-light detection method of mine, specific implementation step are as follows:
(1) land mine to be measured is embedded in sandy soil, the sandy soil above the land mine to be measured is completely covered described to geodetic
The upper end disc of thunder；
(2) the sounding port face of the loudspeaker is buried to the region of the land mine to be measured；
(3) beam expanding lens is fixed, expands the laser of the semiconductor laser perpendicular through described
After mirror, uniform irradiation is in the region of the land mine to be measured；
(4) position of the adjustment reflecting mirror and angle and fixation, make the laser of the semiconductor laser through institute
Enter the CCD camera after stating reflecting mirror reflection；
(5) position of the adjustment CCD camera and angle and fixation, make to be radiated at the laser for burying geodetic minefield domain
Detected after reflection by the CCD camera, with through the reflecting mirror reflection after enter the CCD camera laser converge to be formed it is dry
It relates to；
(6) signal generator is issued frequency is f0The starting sine wave signal of Hz, is adjusted by the sound console
The size of acoustic pressure is high by issuing after the power amplifier amplifying power by the intensity of the balancer stabilization signal wave
Intensity sinusoidal sound wave；
(7) keep the energy output power parameter setting of the signal generator and the loudspeaker constant, by the letter
The sinusoidal sound wave signal frequency that number generator issues increases 1Hz, i.e. the frequency of sending sine wave signal is (f0+ 1) Hz, using logical
It crosses the sequentially connected CCD camera of data line, described image capture card and the computer measurement and records the frequency sound waves
The speckle interference image in the land mine region to be measured is buried under excitation；
(8) operation for repeating step (7), the frequency for measuring and recording sine wave signal is (f0+ 2) embedded described when Hz
The speckle interference image in land mine region to be measured；
(9) in the computer, by Matlab image processing software, using phase size reduction mode to step (7) and step
(8) two width speckle interference images in are overlapped processing, then do fast Fourier change using the fft2 function in Matlab
It changes, transformed image spectrum center origin is moved on into center using the fftshift function in Matlab, finally to Fu
In leaf transformation result take logarithm to visualize, select threshold value, the interference fringe comprising vibration information is calculated in the computer
Figure；
(10) step identical as step (7)-(9) is taken, measures and records in the computer to predeterminated frequency and is
(f0+ N) Hz when the speckle interference fringe pattern for burying the land mine region to be measured；
(11) all as obtained in speckle interference theoretical treatment and analytical procedure (9)-(10) in the computer to dissipate
Spot interference fringe picture, from the amplitude information for demodulating each point in image in stripe information；
(12) the bar graph amplitude information demodulated in step (11) is drawn out into corresponding embedded region two-dimensional spatial location
Three-dimensional figure, obtain burying the land mine region to be measured in fiThe vibration shape under the corresponding mode of oscillation of rank intrinsic frequency, wherein
F indicates intrinsic frequency, and i=1,2 ..., m, m indicates the order of intrinsic frequency, using the Computer display and record, in three-dimensional
Amplitude larger part indicates to bury the land mine to be measured in figure.
Compared with prior art, the present invention has the advantages that following substantive distinguishing features outstanding and significant:
Entire detection device is based on laser speckle interferometry vibration measuring principle, and with structure, simple, measurement accuracy is up to optical wavelength
The advantages of rank, high sensitivity, whole audience rapid survey and non-contact measurement, computer disposal image use phase size reduction mode, place
Reason facilitates intuitive, can exclude the influence of environment light, application scenarios are extensive.
Detailed description of the invention
Fig. 1 is the fast sound-light detection device structural schematic diagram of mine of the invention.
Fig. 2 is the fast sound-light detection method implementation steps block diagram of mine.
Specific embodiment
The preferred embodiment of the present invention combination attached drawing is discussed below:
Referring to Fig. 1, a kind of fast sound-light detection device of mine, including it is signal generator 101, sound console 102, flat
Weighing apparatus 103, power amplifier 104, loudspeaker 105, semiconductor laser 106, beam expanding lens 107, reflecting mirror 108, CCD camera
109, image pick-up card 110 and computer 111；The signal generator 101 is sequentially connected the sound console by data line
102, the balancer 103, the power amplifier 104 and the loudspeaker 105；The CCD camera 109 by data line according to
Secondary connection described image capture card 110 and the computer 111；The beam expanding lens 107 and the reflecting mirror 108 pass through fixed dress
Set fixation.
Scientific and technological (Tektronix) the Co., Ltd production in signal generator selection Tyke used in the present embodiment
AFG3022C type random waveform/function generator, loudspeaker select the JB215 of sound king (SoundKing) Co., Ltd production big
Power speaker, sound console select the mg8/2fx professional audio sound console of Yamaha (Yamaha) company production, and balancer selection is refined
Horse breathes out the Q2031B series balance device of (Yamaha) company production, and power amplifier selects the production of Dongguan Dong Ya sound equipment Co., Ltd
PA bank of power amplifier, CCD camera use Min Tong business corporation production MTV-23X11HE CCD industrial camera,
The OK_M20B high-resolution black-white image grabbing card produced in the good perseverance of image pick-up card selection from company, beam expanding lens and reflecting mirror
Select the LBE series laser beam expanding lens and reflecting mirror of Beijing Zolix Instrument Co., Ltd.'s production, semiconductor laser selection
The 660nm laser of Shanghai Hao Liang optoelectronic device Co., Ltd production, computer are to be measured using the serial computer of association (Lenovo)
Land mine sample uses the antitank plastics practice mine of 69 formulas.
Referring to Fig. 1 and Fig. 2, the fast sound-light detection method of a kind of mine, using above-mentioned detection device, this method tool
Body implementation steps are as follows:
(1) land mine 112 to be measured is embedded in sandy soil 113, makes the sandy soil of 112 top of land mine to be measured that institute be completely covered
State the upper end disc 114 of land mine 112 to be measured；
(2) the sounding port face of the loudspeaker 105 is buried to the region of the land mine to be measured 112；
(3) beam expanding lens 107 is fixed, the laser for emitting the semiconductor laser 106 is perpendicular through institute
After stating beam expanding lens 107, uniform irradiation is in the region of the land mine 112 to be measured；
(4) position of the adjustment reflecting mirror 108 and angle and fixation emit the semiconductor laser 106 sharp
Light enters the CCD camera 109 after the reflecting mirror 108 reflection；
(5) position of the adjustment CCD camera 109 and angle and fixation, make to be radiated at and bury 112 region of geodetic thunder
Laser detected after reflection by the CCD camera 109, with through the reflecting mirror 108 reflection after enter the CCD camera 109
Laser converge to form interference；
(6) signal generator 101 is issued frequency is f0The starting sine wave signal of Hz, passes through the sound console
102 adjust the size of acoustic pressure, by the intensity of the 103 stabilization signal wave of balancer, are amplified by the power amplifier 104
High-intensitive sinusoidal sound wave is issued after power；
(7) keep the energy output power parameter setting of the signal generator 101 and the loudspeaker 105 constant, it will
The sinusoidal sound wave signal frequency that the signal generator 101 issues increases 1Hz, i.e. the frequency of sending sine wave signal is (f0+1)
Hz is surveyed using by the sequentially connected CCD camera 109 of data line, described image capture card 110 and the computer 111
It measures and records the speckle interference image for burying 112 region of land mine to be measured under frequency sound waves excitation；
(8) operation for repeating step (7), the frequency for measuring and recording sine wave signal is (f0+ 2) embedded described when Hz
The speckle interference image in 112 region of land mine to be measured；
(9) in the computer 111, by Matlab image processing software, using phase size reduction mode to step (7) and step
Suddenly two width speckle interference images in (8) are overlapped processing, then do fast Fourier using the fft2 function in Matlab
Transformation, moves on to center for transformed image spectrum center origin using the fftshift function in Matlab, finally right
Fourier transformation result takes logarithm to visualize, and selects threshold value, calculates the interference comprising vibration information in the computer 111
Bar graph；
(10) step identical as step (7)-(9) is taken, is measured and recorded in the computer 111 to predeterminated frequency
For (f0+ N) Hz when the speckle interference fringe pattern for burying 112 region of land mine to be measured；
(11) own as obtained in speckle interference theoretical treatment and analytical procedure (9)-(10) in the computer 111
Speckle interference fringe pattern, from the amplitude information for demodulating each point in image in stripe information；
(12) the bar graph amplitude information demodulated in step (11) is drawn out into corresponding embedded region two-dimensional spatial location
Three-dimensional figure, obtain burying 112 region of land mine to be measured in fiThe vibration shape under the corresponding mode of oscillation of rank intrinsic frequency,
In, f indicates intrinsic frequency, i=1,2 ..., m, and m indicates the order of intrinsic frequency, it is shown and is recorded using the computer 111,
Amplitude larger part indicates to bury the land mine to be measured 112 in three-dimensional figure.
Claims (2)
1. a kind of fast sound-light detection device of mine, which is characterized in that including signal generator (101), sound console
(102), balancer (103), power amplifier (104), loudspeaker (105), semiconductor laser (106), beam expanding lens (107),
Reflecting mirror (108), CCD camera (109), image pick-up card (110) and computer (111)；The signal generator (101) passes through
Data line is sequentially connected the sound console (102), the balancer (103), the power amplifier (104) and the loudspeaker
(105)；The CCD camera (109) is sequentially connected described image capture card (110) and the computer (111) by data line；
The beam expanding lens (107) and the reflecting mirror (108) are fixed by fixed device.
2. the fast sound-light detection method of a kind of mine, using detection device described in claim 1, which is characterized in that
Specific implementation step are as follows:
(1) land mine to be measured (112) is embedded in sandy soil (113), the sandy soil above the land mine to be measured (112) is completely covered
The upper end disc (114) of the land mine to be measured (112)；
(2) the sounding port face of the loudspeaker (105) is buried to the region of the land mine to be measured (112)；
(3) beam expanding lens (107) is fixed, the laser for emitting the semiconductor laser (106) is perpendicular through institute
After stating beam expanding lens (107), uniform irradiation is in the region of the land mine (112) to be measured；
(4) position of the adjustment reflecting mirror (108) and angle and fixation emit the semiconductor laser (106) sharp
Light enters the CCD camera (109) after the reflecting mirror (108) are reflected；
(5) position of the adjustment CCD camera (109) and angle and fixation, make to be radiated at and bury geodetic thunder (112) region
Laser after reflection by the CCD camera (109) detect, with through the reflecting mirror (108) reflection after enter the CCD camera
(109) laser converges to form interference；
(6) signal generator (101) are issued frequency is f0The starting sine wave signal of Hz passes through the sound console (102)
The size for adjusting acoustic pressure is put by the intensity of the balancer (103) stabilization signal wave by the power amplifier (104)
High-intensitive sinusoidal sound wave is issued after high-power；
(7) keep the energy output power parameter setting of the signal generator (101) and the loudspeaker (105) constant, it will
The sinusoidal sound wave signal frequency that the signal generator (101) issues increases 1Hz, i.e. the frequency of sending sine wave signal is (f0+
1) Hz, using pass through the sequentially connected CCD camera (109) of data line, described image capture card (110) and the computer
(111) the speckle interference image that land mine to be measured (112) region is buried under frequency sound waves excitation is measured and recorded；
(8) operation for repeating step (7), the frequency for measuring and recording sine wave signal is (f0+ 2) when Hz bury it is described to be measured
The speckle interference image in land mine (112) region；
(9) in the computer (111), by Matlab image processing software, using phase size reduction mode to step (7) and step
(8) two width speckle interference images in are overlapped processing, then do fast Fourier change using the fft2 function in Matlab
It changes, transformed image spectrum center origin is moved on into center using the fftshift function in Matlab, finally to Fu
In leaf transformation result take logarithm to visualize, select threshold value, calculate the interference comprising vibration information in the computer (111)
Bar graph；
(10) step identical as step (7)-(9) is taken, measures and records in the computer (111) to predeterminated frequency and is
(f0+ N) Hz when the speckle interference fringe pattern for burying land mine to be measured (112) region；
(11) all as obtained in speckle interference theoretical treatment and analytical procedure (9)-(10) in the computer (111) to dissipate
Spot interference fringe picture, from the amplitude information for demodulating each point in image in stripe information；
(12) the bar graph amplitude information demodulated in step (11) is drawn out the three of corresponding embedded region two-dimensional spatial location
Dimension figure, obtains burying land mine to be measured (112) region in fiThe vibration shape under the corresponding mode of oscillation of rank intrinsic frequency,
In, f indicates intrinsic frequency, i=1,2 ..., m, and m indicates the order of intrinsic frequency, is shown and is remembered using the computer (111)
Record, amplitude larger part indicates to bury the land mine to be measured (112) in three-dimensional figure.
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Cited By (3)
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| CN111445522A (en) * | 2020-03-11 | 2020-07-24 | 上海大学 | Passive night-vision intelligent mine detection system and intelligent mine detection method |
| CN112525008A (en) * | 2020-11-16 | 2021-03-19 | 河南科技大学 | Acoustic seismic remote landmine detection system and detection method thereof |
| CN113534287A (en) * | 2021-06-23 | 2021-10-22 | 上海大学 | All-weather sound-light mine detection device and method |
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| CN113534287A (en) * | 2021-06-23 | 2021-10-22 | 上海大学 | All-weather sound-light mine detection device and method |
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