CN105629230B - Battlefield vehicle nondestructive detection system and method - Google Patents
Battlefield vehicle nondestructive detection system and method Download PDFInfo
- Publication number
- CN105629230B CN105629230B CN201610046605.3A CN201610046605A CN105629230B CN 105629230 B CN105629230 B CN 105629230B CN 201610046605 A CN201610046605 A CN 201610046605A CN 105629230 B CN105629230 B CN 105629230B
- Authority
- CN
- China
- Prior art keywords
- signal
- millimeter wave
- frequency
- battlefield
- vehicle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
Abstract
The present invention provides a kind of battlefield vehicle nondestructive detection systems, including：Transmitting antenna emits signal for sending millimeter wave to tested battlefield vehicle；Reception antenna, for receiving the echo-signal returned from tested battlefield vehicle；Millimeter wave transceiving module, for generating the echo-signal of millimeter wave transmitting signal and reception and processing from reception antenna for being sent to tested battlefield vehicle；Scanning means, for fixing and moving millimeter wave transceiving module, transmitting antenna and reception antenna；Data acquisition and processing (DAP) module, for acquiring and handling the echo-signal exported from millimeter wave transceiving module to generate the 3-D view of tested battlefield vehicle；And image-display units, for showing the 3-D view generated by data acquisition and processing (DAP) module.In addition, the present invention also provides the battlefield vehicle lossless detection methods for using above-mentioned battlefield vehicle nondestructive detection system to carry out.The advantages such as technical scheme of the present invention has simple in structure, high resolution, imaging time is short, visual field is larger.
Description
Technical field
The present invention relates to the millimeter wave three-dimensional based on linear frequency modulation technology, superhet detection principle and holographic imaging principle at
As system, and in particular, to battlefield vehicle nondestructive detection system and method.
Background technology
The frequency of millimeter wave is 30GHz to 300GHz (wavelength is from 1mm to 10mm), in practical engineering application, often milli
The low end frequency of metric wave drops to 26GHz.In electromagnetic spectrum, the position of millimeter-wave frequency between microwave and it is infrared between.With it is micro-
Wave is compared, and the typical feature of millimeter wave is that wavelength is short, bandwidth (have very wide utilize space) and biography in an atmosphere
Broadcast characteristic.Compared with infrared, millimeter wave has the ability of all weather operations and can be used for flue dust, under the adverse circumstances such as cloud and mist.
In the case where microwave frequency band is more and more crowded, the advantages of millimeter wave takes into account microwave, and be also equipped with low-frequency range microwave and do not have
Some standby advantages.
Specifically, millimeter wave mainly has following feature：1, precision is high, and millimetre-wave radar is easier to obtain narrow wave
Beam and big absolute bandwidth so that millimetre-wave radar system anti-electronic jamming capability is stronger；2, in Doppler radar, millimeter wave
Doppler frequency resolution it is high；3, in millimeter wave imaging system, millimeter wave is sensitive to the shape and structure of target, distinguishes metal
The ability of target and background environment is strong, and the image resolution ratio of acquisition is high, therefore can be improved to target identification and detectivity 4, milli
Metric wave can penetrate plasma；5, compared with infrared laser, millimeter wave is influenced small by extreme natural environment；6, millimeter wave system
It unites small, light-weight, therefore compared with microwave circuit, millimetre-wave circuit size is much smaller, to which millimeter-wave systems are more easy to
It is integrated.Exactly these unique properties impart the wide application prospect of millimeter-wave technology, especially in non-destructive testing and safety check
Field.
In the mm-wave imaging early stage of development, millimeter wave imaging system all use single pass mechanical scanning system, it is this at
As institutional structure is simple but sweep time is long.In order to shorten sweep time, Millivision companies have developed Veta125
Imager, the imager in addition to emitting scanning system, also with 8 × 8 array received mechanism, but this imager more suitable for
Outdoor monitoring long-range on a large scale, and visual field is less than 50 centimetres.Trex companies still further developed a set of PMC-2 imaging systems, this
Antenna element in imaging system uses the technology of 3mm phased array antenna.PMC-2 imaging systems use centre frequency
The millimeter wave of 84GHz, the working frequency of this imaging system is due to close to Terahertz frequency range, thus cost is higher.Lockheed
Martin companies also have developed a set of focal-plane imaging array imaging system, and the centre frequency of the millimeter wave used is 94GHz.
TRW Ltd. (US) One Space Park, Redondo Beach CA 90278 U.S.A. has developed a set of passive millimeter wave imaging system, and the centre frequency for the millimeter wave that this set system uses is 89GHz.
The visual field of the imaging system of this two company of Lockheed Martin and TRW is all smaller, generally also less than 50 centimetres.
At this stage in mm-wave imaging field, mm-wave imaging achievement in research is concentrated mainly on northwest Pacific laboratory
(Pacific Northwest National Laboratory).McMakin et al. in this laboratory, develops a set of three
Holographic imaging scanning system is tieed up, the scan mechanism of this set imaging system is to be scanned based on cylinder, and this set system has been carried out
The commercialization of millimeter wave imaging system.The imaging system is obtained using Active Imaging mechanism by Holographic Algorithm inverting
The three-dimensional millimeter-wave image of target.Technique authorized L-3Communications and Save View Co., Ltds, he
The product produced be respectively used in the safe examination system in the places such as station terminal and examination is selected among clothes.But due to this germline
System uses 384 Transmit-Receive Units, thus cost cannot lower always.Northwest Pacific laboratory is just dedicated to higher at present
The millimeter wave imaging system of frequency develops.
In addition to laboratory presented hereinbefore and company, in countries such as Britain, the U.S., also there are many scientific research institutions and enterprise
Take part in the research of mm-wave imaging technology, such as naval of the ground force Air Force Research Laboratory in the U.S. and coastal base company of naval
And the universities such as Delaware, Arizona, the Reading universities of Britain, Durham universities and Farran companies etc..
In addition to Great Britain and America state, German microwave and Radar Research Establishment (Microwave and Radar Institute) and
The Aviation Center (German Aerospace Center) of Germany also has the research for participating in mm-wave imaging technology.Australia
The centers ICT, there is the report of related mm-wave imaging achievement in research in Japanese NEC Corporation etc..But the millimeter of these units
Or the product price that wave research is in laboratory stage or develops is very high, or the visual field of detection is smaller.
Battlefield vehicle and general car for military purposes have very big difference, and it is various multiple that he generally requires adaptation field
Miscellaneous, severe road conditions and driving cycle, harsh environment require its vehicle performance very high.And vehicle fatigue damage is become
The prediction of the evaluation indexes such as shape is a problem.Traditional solution requires harshness to experimental condition, expends a large amount of manpowers, object
Power.Therefore, using millimeter wave 3D hologram imaging system, it is quickly detected, battlefield car test can be greatly improved and surveyed
Efficiency.
A kind of that therefore, it is necessary to prices is low, visual field is big millimeter wave three-dimensional imaging detecting system realizes the nothing to battlefield vehicle
Damage detection.
Invention content
The purpose of the present invention is to provide the short battlefield vehicle non-destructive testings of a kind of simple in structure, high resolution, imaging time
System.
According to an aspect of the invention, there is provided a kind of battlefield vehicle nondestructive detection system, including：Transmitting antenna is used for
Millimeter wave, which is sent, to tested battlefield vehicle emits signal；Reception antenna, for receiving the echo-signal returned from tested battlefield vehicle；In the least
Metric wave transceiver module comes from reception antenna for generating to be sent to the millimeter wave transmitting signal of tested battlefield vehicle and receive and handle
Echo-signal；Scanning means, for fixing and moving millimeter wave transceiving module, transmitting antenna and reception antenna；Data acquire
And processing module, for acquiring and handling the echo-signal exported from millimeter wave transceiving module to generate the three-dimensional of tested battlefield vehicle
Image；And image-display units, for showing the 3-D view generated by data acquisition and processing (DAP) module.
Further, scanning means includes：Two pieces of plane monitoring-network panels are used to support millimeter wave transceiving module, transmitting day
Line and reception antenna, tested battlefield vehicle are placed between two pieces of plane monitoring-network panels；Two pairs of guide rails are separately positioned on every piece of plane inspection
The both sides of panel are surveyed, millimeter wave transceiving module, transmitting antenna and reception antenna are moved up and down along guide rail；And motor, for controlling
Millimeter wave transceiving module, transmitting antenna and reception antenna moving up and down along guide rail processed.
Further, N number of millimeter wave transceiving module, N number of transmitting antenna are set on every piece of plane monitoring-network panel and N number of connect
Antenna is received, each millimeter wave transceiving module corresponds to a transmitting antenna and a reception antenna, and N number of millimeter wave transceiving module is simultaneously
With shape millimeter wave transceiving system in a row, N number of transmitting antenna is arranged side by side to form transmitting antenna array and N number of row's setting
Reception antenna is arranged side by side is greater than integer equal to 2 to form receiving antenna array wherein N.
Further, N number of millimeter wave transceiving module carries out the transmitting and reception of millimeter wave according to timing control one by one.
Further, millimeter wave transceiving module includes：Emit link, for generating the millimeter wave for being sent to tested battlefield vehicle
Emit signal；And receives link, for receive echo-signal that tested battlefield vehicle returns and to echo-signal handled with
It is sent to data acquisition and processing (DAP) module.
Further, transmitting link includes：First signal source, the first signal source are the tune being operated within the scope of first frequency
Frequency source signal；The input terminal of first directional coupler, the first directional coupler is connected to the first signal source, and straight-through end is connected to
One power amplifier；First power amplifier is amplified the power of the output signal of the first directional coupler to reach
The safe input power range of one varactor doubler；And first varactor doubler, two times of the signal that the first power amplifier is exported
Frequency is exported to second frequency range, and by the signal after two frequencys multiplication to transmitting antenna.
Further, receives link includes：Second signal source, second signal source are the point-frequency signals for being operated in first frequency
Source；The input terminal of second directional coupler, the first directional coupler is connected to second signal source；First frequency mixer, the first mixing
The intermediate frequency end of device is connected to the straight-through end of the second directional coupler, and radio-frequency head is connected to the coupled end of the first directional coupler, with
Generate the difference frequency signal of the first signal source and second signal source；The input terminal of second power amplifier, the second power amplifier connects
The local oscillator end of the first frequency mixer is connected to receive difference frequency signal, and the power of difference frequency signal is amplified to reach the two or two times
The safe input power range of frequency device；The input terminal of second varactor doubler, the second varactor doubler is connected to the second power amplifier
Output, two are carried out to the output signal of the second power amplifier and is multiplied to second frequency；Second frequency mixer, the second frequency mixer
Local oscillator end is connected to the output end of the second varactor doubler, and the echo-signal that radio-frequency head reception reception antenna is received is to generate for the first time
Down-conversion signal；Third power amplifier, the input terminal of third power amplifier are connected to the coupled end of the second directional coupler,
Power amplification is carried out to the signal from the second directional coupler；Third varactor doubler, the input terminal connection of third varactor doubler
To the output end of third power amplifier, two frequency multiplication operations are carried out to second frequency to the signal from third power amplifier；
Third frequency mixer, the local oscillator end of third frequency mixer are connected to the output end of third varactor doubler, and radio-frequency head is connected to the second mixing
The intermediate frequency end of device is to generate secondary down-conversion signal；And low-noise amplifier, the input terminal of low-noise amplifier are connected to
The intermediate frequency end of three-mixer is amplified the secondary down-conversion signal received and exports to data acquisition and processing (DAP) module.
Further, first frequency ranging from 13.5GHz-16.5GHz, second frequency ranging from 27GHz-33GHz, first
Frequency is 35MHz and second frequency is 70MHz.
Further, in data acquisition and processing (DAP) module, the echo-signal from millimeter wave transceiving module is acquired, will be returned
Wave signal and spatial position signal contact are to together, then carrying out Fourier transformation and inverse Fourier transform to obtain graphics
Picture.
According to another aspect of the present invention, a kind of battlefield vehicle carried out using above-mentioned battlefield vehicle nondestructive detection system is provided
Lossless detection method includes the following steps：Scanning means moves millimeter wave transceiving module, transmitting antenna and reception antenna to scan
Tested battlefield vehicle；Millimeter wave transceiving module generates millimeter wave and emits signal；The milli that transmitting antenna generates millimeter wave transceiving module
Decimetric emission signal is transmitted to tested battlefield vehicle；Reception antenna, which receives, is tested echo-signal that battlefield vehicle returns and by echo-signal
It is sent to millimeter wave transceiving module；Millimeter wave transceiving module handles echo-signal and is sent to data acquisition and processing (DAP) mould
Block；Data acquisition and processing (DAP) module handles to generate the three-dimensional for being tested battlefield vehicle the signal from millimeter wave transceiving module
Image；And image-display units show the 3-D view generated by data acquisition and processing (DAP) module.
Technical solution through the invention simplifies system knot compared with existing millimeter wave three-dimensional imaging detecting system
Structure improves resolution ratio, shortens imaging time, and have larger visual field.
Description of the drawings
Fig. 1 is the composition frame chart of the battlefield vehicle nondestructive detection system of the present invention.
Fig. 2 is the structural schematic of the battlefield vehicle nondestructive detection system of the present invention.
Fig. 3 is the circuit diagram of the millimeter wave transceiving module in the battlefield vehicle nondestructive detection system of the present invention.
Fig. 4 be the battlefield vehicle nondestructive detection system of the present invention data acquisition and processing (DAP) module in the hologram three-dimensional that carries out at
As the flow chart of algorithm.
Fig. 5 is the objective imaging schematic diagram of the battlefield vehicle nondestructive detection system of the present invention.
Fig. 6 is the flow chart of the battlefield vehicle lossless detection method of the present invention.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Mm-wave imaging system is broadly divided into millimeter wave Active Imaging and millimeter wave imaging and passive imaging.This passive millimeter wave at
It is relatively simple for structure as the advantages of system, cost of implementation is relatively low, and disadvantage is exactly that imaging time is too long, and poor imaging is differentiated
Rate.With the development of the raising and millimetric wave device technology of millimetric wave device level, millimeter wave Active Imaging starts by more next
More attention.In millimeter wave Active Imaging, active synthetic aperture imaging and active holographic imaging are main imaging systems.
The method that the method for millimeter wave holographic imaging is derived from optical holographic, millimeter wave holographic imaging utilize the relevant principle of electromagnetic wave,
Transmitter first will emit the millimeter-wave signal of high stable, and receiver receives the transmitting signal each put in target and by echo
Signal carries out Coherent processing with highly coherent reference signal, the amplitude and phase information of echo-signal is extracted, to obtain
Emission characteristics on target point, finally the target millimeter wave in it can be obtained by scene by the method for data and image procossing
Image.The millimeter-wave image good resolution that millimeter wave active holographic imaging obtains, is substantially shorter being matched with mechanical scanning
Imaging time is, it can be achieved that be engineered, so millimeter wave holographic imaging is particularly suitable for millimeter wave short range Active Imaging.
Detailed description of the present invention embodiment referring to the drawings.
Fig. 1 is the composition frame chart of the battlefield vehicle nondestructive detection system of the present invention.Fig. 2 is the battlefield vehicle non-destructive testing of the present invention
The structural schematic of system.
As shown in Figure 1, the battlefield vehicle nondestructive detection system of the present invention includes：Transmitting antenna 14 is used for tested battlefield vehicle
It sends millimeter wave and emits signal；Reception antenna 15, for receiving the echo-signal returned from tested battlefield vehicle；Millimeter wave transceiving mould
Block 11, for generating the echo of millimeter wave transmitting signal and reception and processing from reception antenna 15 for being sent to tested battlefield vehicle
Signal；Scanning means 10, for fixing and moving millimeter wave transceiving module 11, transmitting antenna 14 and reception antenna 15；Data are adopted
Collection and processing module 12, for acquiring and handling the echo-signal exported from millimeter wave transceiving module 11 to generate tested battlefield vehicle
3-D view；And image-display units 13, for showing the 3-D view generated by data acquisition and processing (DAP) module 12.
As shown in Fig. 2, scanning means 10 is by vertical direction guide rail 21, motor (for example, stepper motor) 22 and plane monitoring-network
Panel 23 forms.Specifically, scanning means 10 supports millimeter wave transceiving module 11, hair including two pieces of plane monitoring-network panels 23
Antenna 14 and reception antenna 15 are penetrated, tested battlefield vehicle 24 is placed between two pieces of plane monitoring-network panels 23.Scanning means 10 further includes
Two pairs of guide rails 21, are separately positioned on the both sides of every piece of plane monitoring-network panel 23, millimeter wave transceiving module 11, transmitting antenna 14 and connect
Antenna 15 is received to move up and down along guide rail 21.Scanning means 10 further includes the control motor 22 for being located at 23 side of detection panel, is used for
Millimeter wave transceiving module 11, transmitting antenna 14 and reception antenna 15 moving up and down along guide rail 21 are controlled, to being tested battlefield
Vehicle 24 scan up and down.
Further as shown in Fig. 2, N number of millimeter wave transceiving module 11, N number of transmitting are arranged on every piece of plane monitoring-network panel 23
Antenna 14 and N number of reception antenna 15, each millimeter wave transceiving module 11 correspond to a transmitting antenna 14 and a reception antenna
15, N number of millimeter wave transceiving module 11 is arranged side by side with shape millimeter wave transceiving system in a row, and N number of transmitting antenna 14 is arranged side by side
It is arranged side by side with forming transmitting antenna array and N number of reception antenna 15 to form receiving antenna array, wherein N is greater than
In 2 integer.
In addition, the transmitting and reception of millimeter wave are carried out one by one according to the N number of millimeter wave transceiving module of timing control 11, to
Complete the horizontal sweep to being tested battlefield vehicle.For example, can be thrown open by hilted broadsword to the control of N number of millimeter wave transceiving module 11 more
It closes to realize, naturally it is also possible to use any time sequence control device known in the art.
In addition, tested battlefield vehicle can also move to improve image taking speed.
It is also important to note that millimeter wave transceiving module 11 and corresponding transmitting antenna included by row's millimeter wave transceiving system
14 and the quantity of reception antenna 15 can be according to the parameters such as the width of plane monitoring-network panel 23 and the image taking speed to be realized
It is arranged, and the width of plane monitoring-network panel 23 can determine according to the size of tested battlefield vehicle 24.In addition, plane monitoring-network
The distance between panel 23 and tested battlefield vehicle 24 can be determined according to indexs such as antenna parameters.Above mentioned size is set
It sets it will become apparent to those skilled in the art that being therefore no longer described in detail.
For example, 1 row's millimeter wave transceiving system may include 64 millimeter wave transceiving modules 11 and 128 antennas, wherein
1-64 transmitting antenna forms transmitting antenna array 14, and the linear frequency modulation for generating 64 millimeter wave transceiving modules 11 is continuous
Amplitude is mapped on measured target 24, and 65-128 reception antenna forms receiving antenna array 15, for receiving by being tested battlefield
Signal that vehicle is reflected back simultaneously is transmitted to 64 millimeter wave transceiving modules 11.Each transmitting antenna corresponds to a reception antenna, transmitting
Antenna 1,2,3 ..., 63 and 64 correspond to respectively reception antenna 65,66,67 ..., 127 and 128.As described above, this 64 millimeter waves
Transceiver module 11 and non-simultaneous operation, but for example controlled by two layers of single pole multiple throw, so that them is one by one sent out
It penetrates and receives,
Fig. 3 is the circuit diagram of the millimeter wave transceiving module in the battlefield vehicle nondestructive detection system of the present invention.
As shown in figure 3, millimeter wave transceiving module 11 includes：Emit link, by signal source 301, directional coupler 302, work(
Rate amplifier 303, varactor doubler 304 form, for generating the millimeter wave transmitting signal for being sent to tested battlefield vehicle 24；And it connects
Link is received, by signal source 307, directional coupler 309, frequency mixer 310,312,313, power amplifier 311,314, varactor doubler
312,315 and low-noise amplifier 317 form, for receiving echo-signal that tested battlefield vehicle 24 returns and to echo-signal
It is handled to be sent to data acquisition and processing (DAP) module 12.
Specifically, signal source 301 is tune of the working frequency in certain frequency range (for example, 13.5GHz-16.5GHz)
Frequency source signal can be expressed as：
Wherein, A1 is expressed as initial magnitude, f1It is the time for preliminary sweep frequency 13.5GHz, t,For signal source 301
Initial phase value, B be FM signal bandwidth, T be the frequency modulation period.
In addition, signal source 307 is working frequency in the unifrequency continuous wave signal source of a fixed frequency (for example, 35MHz),
It can be expressed as：
Its initial magnitude and phase be respectively A2 andFrequency is f2.
Note that the frequency range of above-mentioned signal source 301 and the frequency of signal source 307 can be selected according to resolution requirement etc.
It selects, this is known to those skilled in the art, is not described herein.
Directional coupler 302 is three port devices, and input terminal receives the output signal of signal source 301, leads directly to end
It is connected to power amplifier 303, to make the power of transmitting link reach 304 safe input power range of varactor doubler.It is passing through
After crossing varactor doubler 304, the frequency for emitting link is multiplied to second frequency range and (is in the frequency range of signal source 301
In the case of 13.5GHz-16.5GHz, frequency range herein is 27GHz-33GHz), finally it is radiated by a transmitting antenna
It is reached in space and is tested battlefield vehicle.Herein, transmitting signal can be expressed as：
Wherein, A1' it is the amplitude for emitting signal.
The output signal in second signal source 307 is connected to the input terminal of directional coupler 309.Frequency mixer 310 is one three
Port devices, wherein medium-frequency IF end connect the straight-through end of directional coupler 309 to input the intermediate-freuqncy signal of such as 35MHz, radio frequency
The ends RF connect the coupled end of directional coupler 302 to input the FM signal of such as 13.5GHz-16.5GHz, and the ends local oscillator LO are then defeated
Go out the difference frequency signal of the signal of the ends RF and IF input to improve to power amplifier 311.Power amplifier 311 makes the signal power
It is amplified in the range of safety operation of varactor doubler 312.It is mixed, so at this point, the output signal of varactor doubler 312 is two signal sources
Signal after two frequencys multiplication again afterwards, can be expressed as：
Frequency mixer 313 is three port devices, wherein the output signal S (t) of the ends local oscillator LO connection varactor doubler 312,
Radio frequency end obtains the echo-signal reflected from tested battlefield vehicle that reception antenna 15 is received.Echo-signal at this time can be with table
It is shown as：
Wherein, α is echo-signal attenuation coefficient, and τ=2R/c is the echo delay that testee generates, and c is that electromagnetic wave exists
The spread speed in space.
The medium-frequency IF end of frequency mixer 313 then exports the superheterodyne signal of local oscillator LO and radio frequency end received signal, wherein
Certain extraterrestrial target information is carried in the signal, can be expressed as：
It can be seen that the incoherence of two signal sources, coherent signal, introduces frequency mixer 316 in order to obtain from (6) formula.
Frequency mixer 316 output with target information relevant superheterodyne signal, radio-frequency head input come self-mixing device 313 for the first time under
Frequency variation signal SIF(t), the input of local oscillator end by signal source 307 by directional coupler 309 coupled end, power amplifier 314 and
The continuous wave signal for such as 70MHz that varactor doubler 315 exports, i.e.,：
Wherein, A2' it is signal amplitude.
316 medium-frequency IF end of frequency mixer then exports second of down-conversion signal S with target informationIF(t), i.e.,：
It is from formula (8) as can be seen that asynchronous using the phase introduced this method eliminates incoherent dual signal source.
Low-noise amplifier 317 can make to be amplified by the faint intermediate-freuqncy signal of down coversion twice, improve output letter
Number signal-to-noise ratio, detectivity, output signal is admitted to data acquisition and processing (DAP) module 12.
Fig. 4 be the battlefield vehicle nondestructive detection system of the present invention data acquisition and processing (DAP) module in the hologram three-dimensional that carries out at
As the flow chart of algorithm.
As shown in figure 4, the signal collected is carried out the acquisition of echo information by data acquisition and processing (DAP) module 12 first
(401), by it together with the signal contact of spatial position.Then the Fourier transformation of geometrical property is carried out using Fourier transformation
(402), inverse Fourier transform (403) is carried out after abbreviation deformation, target three-dimensional image (404) is finally obtained, in conjunction with spatial domain position
Information carries out the acquisition of final data.
Fig. 5 is the objective imaging schematic diagram of the battlefield vehicle nondestructive detection system of the present invention.
As shown in figure 5, after Millimeter Wave via crosses the scattering at the location point (x, y, z) of target 502, position is (X, Y, Z0)
Reception antenna 501 starts to receive the wideband echoes signal after scattering.The signal received is sent into millimetre-wave circuit and height by antenna
The relevant local oscillation signal of degree carries out down coversion, then passes through low-noise amplifier 317.If obtained signal is E (X, Y, ω), wherein
ω is the instantaneous angular frequency of emission source, and E (X, Y, ω) is the function about ω, and expression formula is：
Wherein,It is the distance between antenna and target point,For electromagnetic wave beam, exponential part indicates target scattering
Spherical wave signal plays an important role to target three-dimensional scattering imaging.And：
E (X, Y, ω) is time-domain signal, it is the expression formula carried out to time dimensional signal E (X, Y, t) after Fourier transformation,
I.e.：
E (X, Y, ω)=FT [E (X, Y, t)] (11)
It brings formula (10) into formula (9), the vector calculus of formula (9) is simplified to scalar operation, is understood from physical significance, it can
To regard as a Spherical wave expansion, it is expressed as the superposition of plane wave, obtains：
Formula has used three-dimensional Fourier transform in (12), i.e.,：
It is also an inverse Fourier transform, i.e.,：
Formula has ignored constant term in (13), and (13) formula, which is substituted into (12) formula, to be obtained：
Inverse transformation is carried out to formula (15), can obtain final broadband millimeter-wave holographic imaging formula is：
From formula (16) if in as can be seen that obtain each Frequency point echo-signal electromagnetic information, so that it may to pass through
A series of invertings obtain f (x, y, z), finally obtain the three-dimensional millimeter wave hologram image of imageable target.
Fig. 6 is the flow chart of the battlefield vehicle lossless detection method of the present invention.
As described in Figure 6, carried out using above-mentioned battlefield vehicle nondestructive detection system the millimeter wave hologram three-dimensional of tested battlefield vehicle at
As detection method includes the following steps：Scanning means moves millimeter wave transceiving module, transmitting antenna and reception antenna to scan quilt
Survey battlefield vehicle；Millimeter wave transceiving module generates millimeter wave and emits signal；The millimeter that transmitting antenna generates millimeter wave transceiving module
Wave transmitting signal is transmitted to tested battlefield vehicle；Reception antenna receives the echo-signal for being tested the return of battlefield vehicle and sends out echo-signal
Give millimeter wave transceiving module；Millimeter wave transceiving module handles echo-signal and is sent to data acquisition and processing (DAP) mould
Block；Data acquisition and processing (DAP) module handles to generate the three-dimensional for being tested battlefield vehicle the signal from millimeter wave transceiving module
Image；And image-display units show the 3-D view generated by data acquisition and processing (DAP) module.
The present invention is by using above-mentioned battlefield vehicle nondestructive detection system and method, with existing mm-wave imaging instrument phase
Than having the advantages that following prominent：
(1) cheap：The present invention makes the scanning effect of one-dimensional array antenna realization face array using driving motor, greatly
Ground reduces cost.
(2) simple in structure, it is easy of integration：The present invention is for example, by using the control millimeter wave transceiving module such as single pole multiple throw channel
Job order, and building for system is carried out using frequency modulation signal source and millimetric wave device, greatly reduces the complexity of system
Degree, while also improving the integrated level of system.
(3) high resolution：The present invention uses CW with frequency modulation technology, super-heterodyne technique and holographic imaging technology, improves
The resolution ratio of 3-D view plane and depth.
(4) imaging time is fast：The present invention can also allow while driving dual-mode antenna to move up and down using motor is tested war
Ground vehicle is travelled forward with certain speed, substantially increases image taking speed.
(5) visual field increases：Compared with existing 50 centimetres of visual fields below, the embodiment of the present invention can reach several meters,
Even tens meters of visual field.
(6) signal-to-noise ratio is high：System is imaged using active millimeter wave, by the output power for controlling each millimetric wave device
Range improves the transmission power of antenna, and certainly, transmission power is within safe radiation scope so that echo-signal signal-to-noise ratio is remote
Far above the signal-to-noise ratio that passive millimeter wave imaging system receives signal, and then obtain higher image quality.
(7) widely used：Using mm-wave imaging technology high-resolution and advantages of simple structure and simple, in addition to carrying out battlefield vehicle
Except non-destructive testing, the detection of all kinds of large-scale instrument outer layer damages can also be carried out, the detection of contraband is also applied for.
It should be noted that each embodiment above by reference to described in attached drawing be only to illustrate the present invention and unrestricted
The range of invention, it will be understood by those of ordinary skill in the art that, it is right under the premise without departing from the spirit and scope of the present invention
The modification or equivalent replacement that the present invention carries out, should all cover within the scope of the present invention.In addition, signified unless the context
Outside, the word occurred in the singular includes plural form, and vice versa.In addition, unless stated otherwise, then any embodiment
All or part of is used in combination with all or part of of any other embodiment.
Claims (7)
1. a kind of battlefield vehicle nondestructive detection system, which is characterized in that the battlefield vehicle nondestructive detection system includes：
Transmitting antenna emits signal for sending millimeter wave to tested battlefield vehicle；
Reception antenna, for receiving the echo-signal returned from the tested battlefield vehicle；
Millimeter wave transceiving module, for generate be sent to the tested battlefield vehicle millimeter wave transmitting signal and receive and processing come
From the echo-signal of the reception antenna；
Scanning means, for fixing and moving the millimeter wave transceiving module, the transmitting antenna and the reception antenna；
Data acquisition and processing (DAP) module, for acquiring and handling the echo-signal exported from the millimeter wave transceiving module to generate
The 3-D view of the tested battlefield vehicle；And
Image-display units, for showing the 3-D view generated by the data acquisition and processing (DAP) module；
Wherein, the scanning means includes：
Two pieces of plane monitoring-network panels are used to support the millimeter wave transceiving module, the transmitting antenna and the reception antenna, institute
It states tested battlefield vehicle to be placed between two pieces of plane monitoring-network panels, N number of millimeter wave is set on every piece of plane monitoring-network panel and is received
Module, N number of transmitting antenna and N number of reception antenna are sent out, each millimeter wave transceiving module corresponds to a transmitting antenna and one connects
Antenna is received, N number of millimeter wave transceiving module is arranged side by side with shape millimeter wave transceiving system in a row, N number of transmitting antenna
It is arranged side by side and is arranged side by side with forming transmitting antenna array and N number of reception antenna to form receiving antenna array, it is described
N number of millimeter wave transceiving module carries out the transmitting and reception of millimeter wave according to timing control one by one, and wherein N is greater than whole equal to 2
Number；
Two pairs of guide rails are separately positioned on the both sides of every piece of plane monitoring-network panel, the millimeter wave transceiving module, the transmitting antenna
It is moved up and down along guide rail with the reception antenna；And
Motor, for controlling the millimeter wave transceiving module, the transmitting antenna and the reception antenna along the guide rail
Lower movement.
2. vehicle nondestructive detection system in battlefield according to claim 1, which is characterized in that the millimeter wave transceiving module packet
It includes：
Emit link, for generating the millimeter wave transmitting signal for being sent to the tested battlefield vehicle；And
Receives link, for receiving echo-signal that the tested battlefield vehicle returns and being handled the echo-signal to send out
Give the data acquisition and processing (DAP) module.
3. vehicle nondestructive detection system in battlefield according to claim 2, which is characterized in that the transmitting link includes：
First signal source, first signal source are the frequency modulation signal sources being operated within the scope of first frequency；
The input terminal of first directional coupler, first directional coupler is connected to first signal source, leads directly to end connection
To the first power amplifier；
First power amplifier is amplified to reach the one or two times the power of the output signal of first directional coupler
The safe input power range of frequency device；And
The signal two that first power amplifier exports is multiplied to second frequency range by first varactor doubler, and will
Signal after two frequencys multiplication is exported to the transmitting antenna.
4. vehicle nondestructive detection system in battlefield according to claim 3, which is characterized in that the receives link includes：
Second signal source, the second signal source are the point-frequency signal sources for being operated in first frequency；
The input terminal of second directional coupler, first directional coupler is connected to the second signal source；
First frequency mixer, the intermediate frequency end of first frequency mixer are connected to the straight-through end of second directional coupler, radio-frequency head
It is connected to the coupled end of first directional coupler, the difference frequency to generate first signal source and the second signal source is believed
Number；
The input terminal of second power amplifier, second power amplifier is connected to the local oscillator end of first frequency mixer to connect
The difference frequency signal is received, and the power of the difference frequency signal is amplified to reach the safe input power of the second varactor doubler
Range；
Second varactor doubler, the input terminal of second varactor doubler is connected to the output of second power amplifier, to institute
The output signal progress two for stating the second power amplifier is multiplied to second frequency；
Second frequency mixer, the local oscillator end of second frequency mixer are connected to the output end of second varactor doubler, radio frequency termination
The echo-signal that the reception antenna is received is received to generate down-conversion signal for the first time；
Third power amplifier, the input terminal of the third power amplifier are connected to the coupling of second directional coupler
End carries out power amplification to the signal from second directional coupler；
Third varactor doubler, the input terminal of the third varactor doubler is connected to the output end of the third power amplifier, right
Signal from the third power amplifier carries out two frequency multiplication operations to the second frequency；
Third frequency mixer, the local oscillator end of the third frequency mixer are connected to the output end of the third varactor doubler, and radio-frequency head connects
The intermediate frequency end of second frequency mixer is connected to generate secondary down-conversion signal；And
Low-noise amplifier, the input terminal of the low-noise amplifier are connected to the intermediate frequency end of the third frequency mixer, to receiving
To the secondary down-conversion signal be amplified and export to the data acquisition and processing (DAP) module.
5. vehicle nondestructive detection system in battlefield according to claim 4, which is characterized in that the first frequency is ranging from
13.5GHz-16.5GHz, the second frequency ranging from 27GHz-33GHz, the first frequency are 35MHz and described the
Two frequencies are 70MHz.
6. vehicle nondestructive detection system in battlefield according to claim 1, which is characterized in that in the data acquisition and processing (DAP) mould
In block, the echo-signal from the millimeter wave transceiving module is acquired, by echo-signal and spatial position signal contact to together,
Then Fourier transformation and inverse Fourier transform are carried out to obtain 3-D view.
7. the lossless inspection of battlefield vehicle that a kind of battlefield vehicle nondestructive detection system using described in any one of claim 1 to 6 carries out
Survey method, which is characterized in that include the following steps：
The scanning means moves the millimeter wave transceiving module, the transmitting antenna and the reception antenna to scan the quilt
Survey battlefield vehicle；
The millimeter wave transceiving module generates millimeter wave and emits signal；
The millimeter wave transmitting signal that the millimeter wave transceiving module generates is transmitted to the tested war by the transmitting antenna
Ground vehicle；
The reception antenna receives the echo-signal that the tested battlefield vehicle returns and the echo-signal is sent to the milli
Metric wave transceiver module；
The millimeter wave transceiving module handles the echo-signal and is sent to the data acquisition and processing (DAP) module；
The data acquisition and processing (DAP) module is handled the signal from the millimeter wave transceiving module to generate the quilt
Survey the 3-D view of battlefield vehicle；And
Described image display unit shows the 3-D view generated by the data acquisition and processing (DAP) module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610046605.3A CN105629230B (en) | 2015-12-28 | 2016-01-22 | Battlefield vehicle nondestructive detection system and method |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511006200 | 2015-12-28 | ||
| CN2015110062009 | 2015-12-28 | ||
| CN201610046605.3A CN105629230B (en) | 2015-12-28 | 2016-01-22 | Battlefield vehicle nondestructive detection system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105629230A CN105629230A (en) | 2016-06-01 |
| CN105629230B true CN105629230B (en) | 2018-07-31 |
Family
ID=56044346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610046605.3A Active CN105629230B (en) | 2015-12-28 | 2016-01-22 | Battlefield vehicle nondestructive detection system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105629230B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113640892A (en) * | 2021-06-29 | 2021-11-12 | 博微太赫兹信息科技有限公司 | Double-visual-angle extensible millimeter wave three-dimensional holographic human body imaging device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203385856U (en) * | 2013-08-15 | 2014-01-08 | 同方威视技术股份有限公司 | Millimeter-wave three-dimensional holographic scanning imaging equipment |
| CN104375143A (en) * | 2013-08-15 | 2015-02-25 | 同方威视技术股份有限公司 | Millimeter wave three-dimensional holoscan imaging device and human or object checking method |
| CN104375144A (en) * | 2013-08-15 | 2015-02-25 | 同方威视技术股份有限公司 | Millimeter wave three-dimensional holoscan imaging device and human or object checking method |
| CN104991283A (en) * | 2015-07-13 | 2015-10-21 | 深圳市一体太赫兹科技有限公司 | Surface-type millimeter wave scanning three-dimensional holographic imaging safety check system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7782251B2 (en) * | 2007-10-06 | 2010-08-24 | Trex Enterprises Corp. | Mobile millimeter wave imaging radar system |
-
2016
- 2016-01-22 CN CN201610046605.3A patent/CN105629230B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203385856U (en) * | 2013-08-15 | 2014-01-08 | 同方威视技术股份有限公司 | Millimeter-wave three-dimensional holographic scanning imaging equipment |
| CN104375143A (en) * | 2013-08-15 | 2015-02-25 | 同方威视技术股份有限公司 | Millimeter wave three-dimensional holoscan imaging device and human or object checking method |
| CN104375144A (en) * | 2013-08-15 | 2015-02-25 | 同方威视技术股份有限公司 | Millimeter wave three-dimensional holoscan imaging device and human or object checking method |
| CN104991283A (en) * | 2015-07-13 | 2015-10-21 | 深圳市一体太赫兹科技有限公司 | Surface-type millimeter wave scanning three-dimensional holographic imaging safety check system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105629230A (en) | 2016-06-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105699494B (en) | Millimeter wave hologram three-dimensional image-forming detecting system and method | |
| CN105607056A (en) | Human body security check system and method | |
| CN105699493B (en) | High ferro nondestructive detection system and method | |
| CN107238868B (en) | Millimeter wave real time imagery safety detecting system and safety detection method | |
| CN105510911B (en) | Based on chirped more people's human body rays safety detection apparatus and method | |
| CN105759269B (en) | The safe examination system and method for 3D hologram imaging | |
| Srivastav et al. | A highly digital multiantenna ground-penetrating radar (GPR) system | |
| CN106872975B (en) | A kind of millimeter wave active near-field imaging device | |
| CN105606630B (en) | Tub nondestructive detection system and method | |
| CN105572667B (en) | Wrap up safety detecting system and method | |
| CN107340269A (en) | The closely ultra wide band Terahertz 3-D imaging system and method for lossless detection | |
| CN106990413B (en) | System and method for heterodyne type full-coherent terahertz three-dimensional high-resolution imaging | |
| CN102135629A (en) | Millimeter wave transceiving module for holographic imaging safety inspection system | |
| CN108152821A (en) | A kind of active MMW imaging safety detecting system and safety detection method | |
| CN101021561A (en) | Wide band rader utilizing multi-transmitting and multi-receiving frequency division signal and imaging method thereof | |
| CN207352187U (en) | Millimeter wave real time imagery safety detecting system | |
| CN207163907U (en) | The closely ultra wide band Terahertz 3-D imaging system of lossless detection | |
| Baccouche et al. | A sparse array based sub-terahertz imaging system for volume inspection | |
| CN105629229B (en) | Plane nondestructive detecting system and method | |
| Yurduseven et al. | Point-spread-function (PSF) characterization of a 340-GHz imaging radar using acoustic levitation | |
| CN105629230B (en) | Battlefield vehicle nondestructive detection system and method | |
| CN106291586B (en) | A kind of method of near field Terahertz dual station synthetic aperture one-dimensional image | |
| CN105699968B (en) | Naval vessel nondestructive detection system and method | |
| CN208224481U (en) | A kind of millimeter-wave signal transceiver machine | |
| CN105223556B (en) | L-type receives and dispatches array antenna front end and its signal processing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211103 Address after: 518102 room 404, building 37, chentian Industrial Zone, chentian community, Xixiang street, Bao'an District, Shenzhen, Guangdong Province Patentee after: Shenzhen Huaxun ark Photoelectric Technology Co., Ltd Address before: 518102 East floor, building 37, chentian Industrial Zone, Baotian 1st Road, Xixiang, Bao'an District, Shenzhen, Guangdong Patentee before: SHENZHEN VICTOOTH TERAHERTZ TECHNOLOGY Co.,Ltd. Patentee before: SHENZHEN THZ SCIENCE AND TECHNOLOGY INNOVATION INSTITUTE |
|
| TR01 | Transfer of patent right |