CN207440292U - Airborne multiple beam optical phased array laser three-dimensional imaging radar system - Google Patents
Airborne multiple beam optical phased array laser three-dimensional imaging radar system Download PDFInfo
- Publication number
- CN207440292U CN207440292U CN201721458475.0U CN201721458475U CN207440292U CN 207440292 U CN207440292 U CN 207440292U CN 201721458475 U CN201721458475 U CN 201721458475U CN 207440292 U CN207440292 U CN 207440292U
- Authority
- CN
- China
- Prior art keywords
- array
- laser
- optical phased
- light source
- phased array
- 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
Landscapes
- Optical Radar Systems And Details Thereof (AREA)
Abstract
Airborne multiple beam optical phased array laser three-dimensional imaging radar system, it is related to radar engineering technical field, it solves existing laser three-dimensional imaging system and exists and close-in target can only be detected, the problems such as imaging frame frequency is low, including multi-beam laser module, transmitting module, receiving module, central processing unit and distance measuring unit, the multi-beam laser module includes beam splitter, phase modulator array, fiber amplifier array and collimator and extender array；The transmitting module includes one-way glass array and optical phased array array；Receiving module includes filter arrays, cemented doublet array, face battle array APD array, quenching circuit and distance measuring unit；By multi-beam laser, region is scanned on a surface target, obtain corresponding cloud data, and the data obtained is handled, it realizes high frame frequency, high-resolution, the reconstruct of the target three-dimensional image of big visual field, completes the detection mission of medium and long distance target over the ground real time high-speed.Tthe utility model system measuring speed is fast, high certainty of measurement.
Description
Technical field
The utility model is related to radar engineering technical fields, and in particular to a kind of airborne multiple beam optical phased array laser three
Tie up imaging radar system.
Background technology
Laser three-dimensional imaging Radar Technology is as a kind of Active Imaging technology, by illumination condition and target background contrast performance
Influence is smaller, and the three-dimensional information of target can be obtained under low-light (level) and complex background, realizes three-dimensional imaging, can be detectd in complex environment
Examine, target range measurement, battle reconnaissance, military target identification, firepower control, the military domains such as undersea detection, and can long working,
It can also be used for the civilian aspect of topography and geomorphology mapping, digital city etc..
Conventional laser radar mostly carries out beam point steering using scan modes such as mechanical deflection, acousto-optic and electric light.Machinery
The response speed and control accuracy of deflecting method limit imaging rate and frame frequency, and since inertia scans, flexibility is subject to very
Big limitation, it is difficult to meet the requirement of High-performance lasers radar；And although mechanical movement, but its is not required in acousto-optic and electro-optical deflection method
Deflection angle usually only has several milliradians, thus is applied in the system that can only be deflected in low-angle, small-bore light beam；Non-scanning mode
Laser radar has abandoned the scanning means of machinery, is greatly improved in the performances such as imaging frame frequency and image quality, but by
It is irradiated in using floodlight, capacity usage ratio is not high, operating distance is near, picture centre and skirt resolution differ greatly, and causes into
As of low quality.
The imaging detection system of conventional laser 3-D imaging system is mainly the following：First, it is detected by core of ICCD
The range-gate selection system of device assembly, the system is by different distance door gated detection multiframe target image, then using multiframe
The mode of image accumulation obtains the three-dimensional distance information of target；It is second is that inclined as the linear electric fields of core detector assembly using streak tube
Turn timing system, it is after converting photons to electronics using electric cathode, recycles the electric field changed linearly over time to difference
Moment reaches the changes in deflection of electronics to record photon arrival time to obtain range information；Third, with EBAPS, MSM etc. for core
The transmitting light modulation of heart detector assembly and detection echo mixing demodulation system, are first modulated transmitting laser, Ran Houli
Echo-signal is detected with detector, finally it is demodulated to obtain the range information of target.These methods have higher
Detectivity and detection accuracy and relatively low power consumption, but close-in target detection can only be carried out, and imaging frame frequency compared with
It is low.
There is the requirements such as imaging resolution is high, imaging rate is fast, the utility model for laser three-dimensional imaging radar system
A kind of optical phased array laser three-dimensional imaging radar system of high-power multi-beam laser output is devised, using high-power mostly light
Beam emits laser, using the APD of multiple partial array Geiger mode angular position digitizers as core detector assembly, realizes highly sensitive high frame at a distance
Frequency is imaged, and realizes that light beam deflects using optical phased array, target area is scanned, to reduce system bulk, is greatly improved
Electromechanical integration is horizontal.
The system can improve the detectivity, survival ability and the capability of independent innovation of airborne laser three-dimensional imaging radar, be
National science and technology deposit provides important technical support, to promote China's national defense Technology Self-innovation Ability and defense-related science, technology and industry hair
Exhibition lays the foundation.
Utility model content
The utility model exists and close-in target can only be detected to solve existing laser three-dimensional imaging system, imaging frame frequency
Low problem provides a kind of airborne multiple beam optical phased array laser three-dimensional imaging radar system.
Airborne multiple beam optical phased array laser three-dimensional imaging radar system, including multi-beam laser module, transmitting module,
Receiving module, central processing unit and distance measuring unit, the multi-beam laser module include beam splitter, phase-modulator battle array
Row, fiber amplifier array and collimator and extender array；The transmitting module includes one-way glass array and optical phased array array；
Receiving module includes filter arrays, cemented doublet array, face battle array APD array, quenching circuit and distance measuring unit；
The central processing unit control multi-beam laser module transmitting laser light source, the laser light source pass through beam splitter point
Power is carried out for multi beam light source, after the phase modulated device array modulation phase of multi beam light source through fiber amplifier array to put
Greatly, then collimated expand after array carries out collimator and extender is received by transmitting module；
The multi beam light source that the transmitting module receives is through one-way glass array transmission to optical phased array array, the center
Processor sends drive signal to optical phased array array, and the light source deflection of control multi beam makes the multi beam light source be incident to target
Region；
The multi beam light source reflected through the target area is incident to the optical phased array array and one-way glass array, passes through
The multi beam light source of the one-way glass array reflection is successively by face battle array APD array after filter arrays and cemented doublet array
It receives, the optical signal of the multiple beam light source of reception is converted into electric signal by face battle array APD array, by distance after quenched circuit
Measuring unit calculates the range information of target area, the central processing unit read Airborne GPS Inertial Measurement Unit position and
Attitude information according to multi beam light source deflection angle information and range information, obtains the spatial position coordinate of target, and carries out three
Image reconstruction is tieed up, realizes radar system imaging.
The beneficial effects of the utility model：
First, radar imaging system described in the utility model was both carried using high-power multi-beam laser as outgoing beam
High detection range, also expands search coverage.
2nd, radar imaging system described in the utility model is subtracted using optical phased array array as beam deflector part
The small volume of system, while quick scanning is realized, improve the resolution ratio of image.Using Geiger mode angular position digitizer (APD) array conduct
Core detector assembly has highly sensitive and high imaging frame frequency, it can be achieved that single photon ranging.Central processing unit uses multinuclear
DSP realizes the parallel computation of data, improves the image taking speed of 3-D view as central processing unit.
3rd, radar system described in the utility model, by multi-beam laser, region is scanned on a surface target, is obtained
Corresponding cloud data, and the data obtained is handled, realize high frame frequency, high-resolution, the target three-dimensional image of big visual field
The detection mission of medium and long distance target over the ground is completed in reconstruct real time high-speed.
4th, radar system described in the utility model possesses measuring speed fast, high certainty of measurement, without cooperative target, anti-
The advantages that interference performance is strong.The ability and see-through capabilities of three-dimensional information are obtained using it, available for the mapping of topography and geomorphology, not only
Digital terrain model can be established to common landform, the inshore that can be also covered to the landform with vegetative coverage or by seawater is built
Vertical numerical cutting tool, meanwhile, the sharp weapon of it or battle reconnaissance, especially detection concealment is under vegetation or under camouflage net
Military target has irreplaceable role.In addition, it is civilian in robot vision, security monitoring, industrial automation production etc.
Aspect also has broad application prospects.
Description of the drawings
Fig. 1 is the structural frames of airborne multiple beam optical phased array laser three-dimensional imaging radar system described in the utility model
Figure；
Fig. 2 is multiple beam in airborne multiple beam optical phased array laser three-dimensional imaging radar system described in the utility model
Laser module structure schematic diagram；
Fig. 3 is to emit mould in airborne multiple beam optical phased array laser three-dimensional imaging radar system described in the utility model
Block structure schematic diagram；
Fig. 4 is to receive mould in airborne multiple beam optical phased array laser three-dimensional imaging radar system described in the utility model
The structure diagram of block.
Specific embodiment
Specific embodiment one illustrates present embodiment, airborne multiple beam optical phased array laser three with reference to Fig. 1 to Fig. 4
Imaging radar system is tieed up, including multi-beam laser module 1, transmitting module 2, receiving module 3, central processing unit 4 and range measurement
Unit 7, the multi-beam laser module 1 include beam splitter 1-1, phase modulator array 1-2, fiber amplifier array 1-3 and
Collimator and extender array 1-4；
The transmitting module 2 include one-way glass array 2-1 and optical phased array (Optical Phased-Array,
OPA) array 2-2；
Receiving module 3 includes filter arrays 3-1, cemented doublet array 3-2, face battle array APD array 3-3, quenching circuit
3-4 and distance measuring unit 3-5；
Multi-beam laser module 1 controls seed after receiving " start " signal of central processing unit (DSP C6678) transmission
Light source emits high power laser signal, and seed light source enters beam splitter 1-1, divides by beam splitter 1-1 for N beam light, the N beams being divided into
Light makes its phase identical by phase of the phase modulator array 1-2 modulation per Shu Guang, is then carried out through fiber amplifier array
Power amplification, collimated to expand output after array 1-4 collimator and extenders be high power multi-beam laser, and the laser of output enters transmitting
Module by one-way glass array 2-1, OPA array, carries out electropical scanning, and the central processing unit (DSP C6678) sends one
Group drive signal U (U1, U2 ... Un) to optical phased array array 2-2, control multi beam light source deflection, makes the multi beam light source incidence
To target area 6；After laser emits by target area, incident beam passes through OPA arrays and one-way glass array 2-1 successively,
At this point, incident beam is reflected into receiving module when passing through one-way glass, passed through after being filtered using filter arrays 3-1
Cemented doublet array 3-2 is crossed, the optical signal of reception is sent into face battle array APD array 3-3 reading circuits, face battle array APD by receiving light path
Received optical signal is converted into corresponding electric signal, then quenched gate array 3-4 processing by array 3-3, is surveyed by distance
The range information that unit calculates detected target region using pulse time-of-flight measuring method is measured, central processing circuit 4 is read
The position of Airborne GPS Inertial Measurement Unit and attitude information, comprehensive beam deflection angle degree information, aircraft position and attitude information with
And range information carries out 3-D view reconstruct, realizes big visual field, high-resolution imaging.
In present embodiment, the distance measuring unit uses pulse time-of-flight measuring method, using based on FPGA's
Timing circuit is realized.
Display module is further included in present embodiment, for the image display handled central processing unit.
In present embodiment, OPA is small, light-weight, can be high-power with laser radar technique phase composite design one kind
The optical phased array laser three-dimensional imaging radar system of multi-beam laser output emits laser, with more using high-power multiple beam
The APD of a partial array Geiger mode angular position digitizer is core detector assembly, realizes that light beam deflects using optical phased array, is swashed by multiple beam
Region is scanned light on a surface target, realizes high frame frequency, high-resolution, the reconstruct of the target three-dimensional image of big visual field, high in real time
The detection mission of medium and long distance target over the ground is completed fastly.
Claims (4)
1. airborne multiple beam optical phased array laser three-dimensional imaging radar system, including multi-beam laser module (1), transmitting module
(2), receiving module (3), central processing unit (4) and distance measuring unit (3-5), it is characterized in that；The multi-beam laser module
(1) beam splitter (1-1), phase modulator array (1-2), fiber amplifier array (1-3) and collimator and extender array (1- are included
4)；
The transmitting module (2) includes one-way glass array (2-1) and optical phased array array (2-2)；
Receiving module (3) includes filter arrays (3-1), cemented doublet array (3-2), face battle array APD array (3-3), quenching
Circuit (3-4) and distance measuring unit (3-5)；
Central processing unit (4) the control multi-beam laser module (1) emits laser light source, and the laser light source passes through beam splitter
(1-1) is divided into multi beam light source, through fiber amplifier array after phase modulated device array (1-2) phase modulation of multi beam light source
(1-3) carries out power amplification, and then collimated expand after array (1-4) carries out collimator and extender is received by transmitting module (2)；
The multi beam light source that the transmitting module (2) receives is transmitted through optical phased array array (2- through one-way glass array (2-1)
2), the central processing unit 4 sends drive signal to optical phased array array (2-2), and the light source deflection of control multi beam makes described more
Light source beam is incident to target area (6)；
The multi beam light source reflected through the target area (6) is incident to the optical phased array array (2-2) and one-way glass battle array
It arranges (2-1), the multi beam light source through the one-way glass array (2-1) reflection is saturating through filter arrays (3-1) and double gluings successively
It is received after lens array (3-2) by face battle array APD array (3-3), face battle array APD array (3-3) is by the multiple beam light source of reception
Optical signal is converted into electric signal, by central processing unit (4) after the quenched circuit of electric signal (3-4) and distance measuring unit (3-5)
It receives.
2. airborne multiple beam optical phased array laser three-dimensional imaging radar system according to claim 1, which is characterized in that
Display module (5) is further included, the display module is connected with central processing unit (4), the image information obtained to central processing unit
It is shown.
3. airborne multiple beam optical phased array laser three-dimensional imaging radar system according to claim 1, which is characterized in that
The distance measuring unit uses FPGA timing circuits.
4. airborne multiple beam optical phased array laser three-dimensional imaging radar system according to claim 1, which is characterized in that
The central processing unit (4) uses DSP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721458475.0U CN207440292U (en) | 2017-11-03 | 2017-11-03 | Airborne multiple beam optical phased array laser three-dimensional imaging radar system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721458475.0U CN207440292U (en) | 2017-11-03 | 2017-11-03 | Airborne multiple beam optical phased array laser three-dimensional imaging radar system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207440292U true CN207440292U (en) | 2018-06-01 |
Family
ID=62291061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721458475.0U Active CN207440292U (en) | 2017-11-03 | 2017-11-03 | Airborne multiple beam optical phased array laser three-dimensional imaging radar system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207440292U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111521993A (en) * | 2020-05-27 | 2020-08-11 | 深圳力策科技有限公司 | Passive nano antenna array receiver and three-dimensional imaging system |
| US11815604B2 (en) | 2020-05-27 | 2023-11-14 | Shenzhen Litra Technology Co., Ltd. | Passive nano-antenna array receiver and three-dimensional imaging system |
-
2017
- 2017-11-03 CN CN201721458475.0U patent/CN207440292U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111521993A (en) * | 2020-05-27 | 2020-08-11 | 深圳力策科技有限公司 | Passive nano antenna array receiver and three-dimensional imaging system |
| US11815604B2 (en) | 2020-05-27 | 2023-11-14 | Shenzhen Litra Technology Co., Ltd. | Passive nano-antenna array receiver and three-dimensional imaging system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107703517A (en) | Airborne multiple beam optical phased array laser three-dimensional imaging radar system | |
| CN109375237B (en) | A kind of all solid state face array three-dimensional imaging laser radar system | |
| CN110806586B (en) | Non-scanning linear frequency modulation continuous wave speed and distance measuring laser three-dimensional imaging method and device | |
| US11940535B2 (en) | Multi-pulse LIDAR system for multi-dimensional detection of objects | |
| CN106342248B (en) | A kind of laser radar for intersection docking between space device | |
| CN112558102B (en) | Airborne oblique laser three-dimensional measurement and composite imaging system and application method thereof | |
| CN105301600B (en) | A kind of no-raster laser three-dimensional imaging device based on taper reflection | |
| CN101839981B (en) | Method and device for acquiring laser imaging echo waveform and level characteristics | |
| CN109541627A (en) | The adaptive range gate laser radar of dual wavelength | |
| CN107991681A (en) | Laser radar and its scan method based on diffraction optics | |
| CN103499818A (en) | Infrared and laser compound detection system | |
| CN207380238U (en) | A kind of laser radar based on diffraction optics | |
| CN207408590U (en) | A kind of laser radar based on two-dimentional DOE elements | |
| CN103682677A (en) | Airship radar conformal thinned array antenna and its signal processing method | |
| CN207833020U (en) | A kind of laser radar scanning imaging system | |
| CN105785389A (en) | Three-dimensional imaging laser radar system | |
| CN110553599A (en) | high-resolution high-speed laser three-dimensional imaging system | |
| CN207440292U (en) | Airborne multiple beam optical phased array laser three-dimensional imaging radar system | |
| CN109298431B (en) | Three-band airborne laser radar system | |
| CN109521438A (en) | A kind of multi-beam photon counting laser imaging method | |
| CN112748443A (en) | Dynamic target three-dimensional imaging device and method | |
| CN203535224U (en) | Infrared and laser composite detection system | |
| CN111007527B (en) | Infrared laser composite rapid imaging tracking device | |
| CN206311755U (en) | A kind of multi-thread range unit of solid-state | |
| Sakib | LiDAR Technology-An Overview. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |