CN104076407B - The many array optical detection systems of baseline wide and its method to set up - Google Patents
The many array optical detection systems of baseline wide and its method to set up Download PDFInfo
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Abstract
The invention discloses a kind of many array optical detection systems of baseline wide, including the main array optical system being arranged on below airframe, two wings lower section of aircraft is equipped with secondary array optical system, and main array optical system includes several optical pickocffs with each secondary array optical system；The invention also discloses the method to set up of many array optical detection systems of baseline wide, the target acquisition requirements such as big visual field, high-resolution, high dynamic and various visual angles can be simultaneously met.
Description
Technical field
The invention belongs to optical detector technology field, and in particular to a kind of many array optical detection systems of baseline wide and its set
Put method.
Background technology
The characteristics of airborne optical detection system has wide investigative range, resolution capability high and passive detection, extensively should
For air target detection, tracking, over the ground target search, tracking, situation of battlefield perceive, guided missile come attack alarm, assisting navigation and
Takeoff and anding etc..
Conventional on-board optical detection system mainly uses structure for pod at present, and its observation visual field is smaller, and target information is carried
Take few, the detection under complex environment to target, tracking can not have been met, has been recognized and the demand such as battle field situation.Meanwhile, gondola
Load restraint seriously limits the raising of optical system resolution ratio.
With the raising of optical pickocff manufacturing process and airborne computer disposal ability, the skill of airborne optical detection system
Art development trend is sensor array and Multi-sensor Image Fusion.Airborne Optical Sensor array utilizes image procossing skill
Art, a large aperture sensor is modeled to by sensor array, effectively overcomes visual field and the conflicting problem of resolution ratio, can
Meet Intelligence, Surveillance and Reconnaissance (ISR) demand in big field range.But have a disadvantage in that：Cannot capture simultaneously high-resolution,
High dynamic movement destination image；The various visual angles information of target cannot be obtained.
The content of the invention
It is an object of the invention to provide a kind of many array optical detection systems of baseline wide and its detection method, can meet simultaneously
The target acquisition requirement such as big visual field, high-resolution, high dynamic and various visual angles.
The first technical scheme of the present invention is, including sets main array optical system, secondary battle array aboard
Row optical system, server and signal generator；
Main array optical system is arranged on airframe lower section, and secondary array optical system is separately positioned on two machines of aircraft
Wing lower section, main array optical system includes several optical pickocffs, main array optical system with each secondary array optical system
System is connected to server by the first line concentrator, and each secondary array optical system is connected to same by the second line concentrator
Individual server, main array optical system is connected to signal generator with each secondary array optical system by triggers circuit.
The characteristics of the first technical scheme, also resides in,
Used between main array optical system and each secondary array optical system and be remotely locatable, main array optical system
And each optical pickocff in two secondary array optical systems is directed at the big visual field of same optics.
Each optical pickocff inside main array optical system and two secondary array optical systems is using centralized cloth
Put and arranged with photocentre.
Under conditions of Aircraft Load permission, the quantity of optical pickocff and each secondary array light in main array optical system
The quantity of the optical pickocff in system is identical.
First line concentrator includes several first nodes, and each first nodes is connected with three in main array optical system
Individual optical pickocff, each first nodes are connected to same two-level node, and two-level node is connected to server.
Second line concentrator includes several first nodes, and each first nodes is connected with three in secondary array optical system
Individual optical pickocff, each first nodes are connected to same two-level node, and two-level node passes through converter, thousand for setting gradually
Million nets, converter and 1394 buses are connected to server.
Triggers circuit includes that the converter A being connected with the optical pickocff firing line of main array optical system, converter A lead to
Cross the low frequency signal interface that multiplexer I, the converter B for setting gradually are connected to signal generator, each secondary array optical
The optical pickocff firing line of system is respectively connected with converter C, and each converter C is all connected to same multiplexer II
On, multiplexer II is connected to the high-frequency signal interface of signal generator by converter D.
The model that the model of converter A and converter C is RS-485/TTL, converter B and converter D is TTL/
RS-485。
Second technical scheme of the invention is specifically to implement according to following steps：
Step 1, on the server installing bottom layer drive software FlyCapture2.0 and top layer images acquisition software
Streampix5.0；
Step 2, first time IMAQ is carried out by main array optical system and two secondary array optical systems, has been gathered
Cheng Hou, 8 are adjusted to by the ratio between time for exposure of the time for exposure of main array optical system and each secondary array optical system:1~
3:1, the ratio between frame speed of the frame speed of main array optical system and each secondary array optical system is adjusted to 8:1~3:1；
Step 3, two kinds of square waves of same-phase different frequency, high-frequency square-wave signal triggering therein are exported by signal generator
Main array optical system, low-frequency square-wave signal therein triggers two secondary array optical systems；
Step 4, the synchronous adjustment of optical pickocff acquisition time：
Step 4.1, in the setting options of top layer images acquisition software Streampix5.0, by gather image from
Dynamic naming method adds the IMAQ moment；
Step 4.2, second IMAQ is carried out by main array optical system and two secondary array optical systems, is gathered
After the completion of, that is, IMAQ moment of each optical pickocff in same array under same square-wave signal is obtained, to postpone
On the basis of maximum optical pickocff, line delay adjustment is entered to remaining optical pickocff；
Step 4.3, repeat step 4.2, until the error at IMAQ moment between different optical pickocffs in array is small
Untill 1ms；
Step 5, after the synchronous adjustment through step 4 to optical pickocff acquisition time, then by main array optical system with
Two secondary array optical systems carry out third time IMAQ, the image that each optical pickocff is collected are contrasted, if in image
There is frame losing phenomenon, then the numerical value for adjusting the parameter dragpackage in bottom layer driving software FlyCapture2.0 is X so that
The image for collecting is joined without frame losing phenomenon, then by corresponding dragpackage in top layer images acquisition software Streampix5.0
Several numerical value are also adjusted to X；If without frame losing phenomenon in the image, without adjustment；
Step 6, by the adjustment of step 5 after, further according to the bright dark situation of scene of image that third time is collected, to every
The parameters such as aperture, the white balance of individual optical pickocff are finely adjusted so that the color of the image for collecting for the third time is with brightness not
Beyond the dynamic range of optical pickocff, that is, complete the structure of many array optical detection systems of baseline wide.
The characteristics of second technical scheme, also resides in,
In step 4.2, it is to the specific method that remaining optical pickocff postpones adjustment：
The package delay options in bottom layer driving software FlyCapture2.0 are chosen, then chooses top layer images to gather
Trigger delay options in software Streampix5.0, are that trigger delay options select suitable parameter, to protect
The collection moment of each optical pickocff inside card array is identical.
The beneficial effects of the invention are as follows by various visual angles fusion realization to big visual field, high-resolution, high dynamic and various visual angles
The detection of distant object, makes full use of the size and structure of aircraft platform, realizes the maximization of optical property, and then completes to fly
Detection of the machine to the distant object of big visual field, high-resolution, high dynamic and various visual angles.
Brief description of the drawings
Fig. 1 is the structural representation of the width many array optical detection systems of baseline of the invention；
Fig. 2 is optical pickocff matrix scheme of installation in the width many array optical detection system embodiments of baseline of the invention；
Fig. 3 is optical pickocff matrix observation region signal in the width many array optical detection system embodiments of baseline of the invention
Figure；
Fig. 4 is that the mounting platform bottom reinforcement structure of the width many array optical detection system embodiments of baseline of the invention is illustrated
Figure；
Fig. 5 is that the cross reinforcement structure of the mounting platform of the width many array optical detection system embodiments of baseline of the invention is illustrated
Figure；
Fig. 6 is the exposure time series figure of the optical pickocff of the width many array optical detection system embodiments of baseline of the invention；
Fig. 7 is the relation schematic diagram of the width many array optical detection system baseline length of baseline of the invention and resolution of ranging；
Fig. 8 a and Fig. 8 b are respectively two secondary array opticals in many array optical detection system embodiments of baseline wide of the invention
The image photograph that system is gathered in synchronization；
Fig. 8 c are the images of main array optical system collection in the width many array optical detection system embodiments of baseline of the invention
Photo；
Fig. 8 d are the moving-target image photographs after recovering in the width many array optical detection system embodiments of baseline of the invention.
In figure, 1. main array optical system, 2. secondary array optical system, 3. optical pickocff, 4. server, 5. signal hair
Raw device, 6. first nodes, 7. two-level node, 8. converter A, 9. multiplexer I, 10. converter B, 11. converter C, 12.
Multiplexer II, 13. converter D.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
The invention provides a kind of many array optical detection systems of baseline wide, its structure is referring to Fig. 1, including is arranged on aircraft
Main array optical system 1 below fuselage, two wings lower section of the aircraft is equipped with secondary array optical system 2, main array
Optical system 1 includes several optical pickocffs 3 with each secondary array optical system 2, and main array optical system 1 passes through first
Line concentrator is connected to server 4, and each secondary array optical system 2 is connected to same server by the second line concentrator
4, main array optical system 1 is connected to signal generator 5 with each secondary array optical system 2 by triggers circuit.
Wherein, used between main array optical system 1 and each secondary array optical system 2 and be remotely locatable, main array
Each optical pickocff 3 in optical system 1 and two secondary array optical systems 2 is directed at the big visual field of same optics.
Had the advantage that using being remotely locatable：
1) referring to Fig. 7, meet various visual angles fusion demand, under 20000m high altitude conditions, main array optical system 1 with it is every
2 baseline widths of individual secondary array optical system are under conditions of 100m, resolution of ranging is smaller than 5m；
2) realize that many exposures are set, realize that high dynamic is imaged, solve motion blur problems.
Each optical pickocff 3 inside main array optical system 1 and two secondary array optical systems 2 is using centralization
Arrange and arranged with photocentre；Aircraft Load permission under conditions of, in main array optical system 1 quantity of optical pickocff 3 with
The quantity of the optical pickocff 3 in each secondary array optical system 2 is identical；Benefit using Centralized layout is so that array
Visual field is all visual field sums, realizes maximization and the high-resolution of visual field.
First line concentrator includes several first nodes 6, and each first nodes 6 is connected with main array optical by Hub
Three optical pickocffs 3 in system 1, each first nodes 6 are connected to same two-level node 7, and two-level node 7 passes through 1394
Bus is connected to server 4.
Second line concentrator includes several first nodes 6, and each first nodes 6 is connected with secondary array optical by Hub
Three optical pickocffs 3 in system, each first nodes 6 are connected to same two-level node 7, and two-level node by setting successively
Converter, kilomega network, converter and 1394 buses put are connected to server 4, and converter model is 1394b/ gigabits herein
Net.
Triggers circuit includes the converter A8 being connected with the optical pickocff firing line of main array optical system 1, converter
A8 is connected to the low frequency signal interface of signal generator 5 by the multiplexer I9, the converter B10 that set gradually, and each is secondary
The optical pickocff firing line of array optical system 2 is respectively connected with converter C11, and each converter C11 is all connected to same
On multiplexer II12, multiplexer II12 is connected to the high-frequency signal interface of signal generator 5 by converter D13.
Wherein, the model of converter A8 and converter C11 is the model of RS-485/TTL, converter B10 and converter D13 and is
TTL/RS-485。
Present invention also offers the method to set up of many array optical detection systems of baseline wide, specifically according to following steps reality
Apply：
Step 1, installing bottom layer drive software FlyCapture2.0 and top layer images acquisition software on server 4
Streampix5.0；
Step 2, first time IMAQ is carried out by main array optical system 1 and two secondary array optical systems 2, is gathered
After the completion of, the ratio between time for exposure of the time for exposure of main array optical system 1 and each secondary array optical system 2 is adjusted to 8:
1~3:1, the ratio between frame speed of the frame speed of main array optical system 1 and each secondary array optical system 2 is adjusted to 8:1~3:1；
Step 3, two kinds of square waves of same-phase different frequency are exported by signal generator 5, and high-frequency square-wave signal therein is touched
Send out array optical system 1 main, low-frequency square-wave signal therein triggers two secondary array optical systems 2；
Step 4, the synchronous adjustment of the acquisition time of optical pickocff 3：
Step 4.1, in the setting options of top layer images acquisition software Streampix5.0, choosing will gather image
Automatic naming method add the IMAQ moment sub- option；
Step 4.2, second IMAQ is carried out by main array optical system 1 and two secondary array optical systems 2, is adopted
After the completion of collection, that is, IMAQ moment of each optical pickocff 3 in same array under same square-wave signal is obtained, to prolong
Late on the basis of maximum optical pickocff 3, line delay adjustment is entered to remaining optical pickocff 3；
Wherein, the specific method of delay adjustment is：
The package delay options in bottom layer driving software FlyCapture2.0 are chosen, then chooses top layer images to gather
Trigger delay options in software Streampix5.0, and according to computational methods (the i.e. experiment spy of try and error
Suo Fangfa, trial-and-error method.First attempt, obtain error result, then improve experiment, reattempt error correction, repetition test is until success.)
For trigger delay options select suitable parameter, to ensure the collection moment phase of each optical pickocff inside array
Together；
Step 4.3, repeat step 4.2, until the error at IMAQ moment between different optical pickocffs 3 in array is small
Untill 1ms；
Step 5, after the synchronous adjustment through step 4 to the acquisition time of optical pickocff 3, then by main array optical system 1
Third time IMAQ is carried out with two secondary array optical systems 2, the image that each optical pickocff 3 is collected is contrasted,
If occurring frame losing phenomenon in image, the parameter in bottom layer driving software FlyCapture2.0 is adjusted
The numerical value of dragpackage is X so that the image for collecting without frame losing phenomenon, then by top layer images acquisition software
The numerical value of corresponding dragpackage parameters is also adjusted to X in Streampix5.0；If without frame losing phenomenon, nothing in the image
Need adjustment；
Step 6, by the adjustment of step 5 after, further according to the bright dark situation of scene of image that third time is collected, to every
The parameters such as aperture, the white balance of individual optical pickocff 3 are finely adjusted so that the color of the image for collecting for the third time is with brightness not
Beyond the dynamic range of optical pickocff 3, that is, complete the structure of the present invention width many array optical detection systems of baseline.
Embodiment
Step 1, builds many array optical detection system structures of baseline wide
1.1) design and installation platform, is used to simulate the installation carrier of many array optical detection systems of baseline wide.
Mounting platform includes a main platform framework of 3m × 3m, while in order to carry out multi-aspect imaging to observed object,
Two auxiliary platforms of design.Because the main array optical system 1 installed on main platform is and the secondary array optical for producing big visual field
System 2 is used for obtaining other auxiliary informations such as depth information, and institute is for installing the auxiliary platform size meeting of pair array optical system 2
Less than main platform, its frame structure for being sized so as to 1.5m × 1.5m.
In order to realize being accurately positioned when mounted of optical pickocff 3, main platform and auxiliary platform are in the horizontal direction and vertically
Direction is equipped with scale, and precision is 1mm.For the ease of arranging the array of optical pickocff 3, main platform and auxiliary platform are all designed with
Four cross slide ways, are slided with the level for realizing optical pickocff 3；Each cross slide way can be with vertical motion, and can
Fix at an arbitrary position, so as to realize being accurately positioned for optical pickocff 3.Meanwhile, main platform side is designed with base, is used to hold
Carry data collecting system.
After mounting platform global design well, in order to strengthen the stability and back structures intensity of mesa base, major and minor
Mesa base increases triangular structure (as shown in Figure 4), and cross reinforcement structure is respectively provided with the guide rail of major and minor platform (such as
Shown in Fig. 5).
In order to realize the multi-angle rotation of optical pickocff 3, optical pickocff 3 is arranged on using the universal joint of SQD-6
On guide rail, SQD-6 universal joints can 25 degree of the unilateral amplitude of oscillation, arbitrarily rest in each angle, it is allowed to optical pickocff forward sight 360
Degree is rotated, and drives any horizontal movement on cross slide way of optical pickocff 3.Simultaneously in order to realize the convenient of mounting platform
Motion, simulates the motion such as level, reversion of aircraft, has universal wheel in mounting platform bottom design.
1.2) a main array optical system 1 of centralized large area, its compact conformation, all of optics are set on main platform
The close-packed arrays of sensor 3, can reach without obvious imaging aberration, using high-resolution long exposure when distant object is detected
Strategy, target information as much as possible is obtained to sacrifice image resolution ratio as cost, wherein being passed with an array inside adjacent optical
Ensure certain intersection visual field between sensor 3, while detection visual field as big as possible；
Secondary array optical system 2 is provided with two auxiliary platforms, the optical pickocff on each secondary array optical system 2
3 use low resolution short exposure strategy, can capture fast moving objects, and its total visual field can all cover main array optical system
The visual field of system 1.
In order to realize the setting requirements of baseline wide, baseline design is between secondary array optical system 2 and main array optical system 1
More than 80m.Arranged using this many array baselines wide, image disparity can be obtained, and then obtain target depth information and carry out many
Merge at visual angle.
1.3) 3 points of 27 optical pickocffs are separately mounted on main platform and two auxiliary platforms for three groups, every group
Including nine optical pickocffs and form the matrix of 3 × 3.
Distance between any two is simultaneously recorded in the position of fixed optical pickocff 3, to the optical pickocff in same matrix
Order according to 1-9 is numbered, and optical pickocff 3 is installed according still further to the numbered positions shown in Fig. 2, and regulation universal joint attitude is true
The observation area for protecting each optical pickocff 3 meets the optical pickocff of requirement shown in Fig. 3, i.e. upper left and observes the area of bottom right
Domain, the region in the left optical pickocff observation right side is by that analogy.
Such purpose is to ensure there is identical photocentre with the optical pickocff 3 in an array, when eliminating image mosaic
Gap and deviation.Finally by the aperture and focus adjustment of all optical pickocffs 3 to identical graduation, it is ensured that optical pickocff 3
External parameter it is identical.
Visual field size for 2000m*2000m*2000m, when intersection visual field is 20% between each optical pickocff 3,
Using single short focus optical pickocff 3, resolution ratio only reaches 3.7m/ pixels, and when using nine array of optical sensors groups, optics is passed
The resolution ratio of sensor 3 can reach 0.5m/ pixels, so as to realize big visual field and high-resolution.
Step 2, sets up data link node and connection server 4.
Main array optical system 1 is located at centre, two groups of secondary array optical systems 2 are located at the two of main array optical system 1
End, two-by-two at a distance of 80 meters between array.
Divide three groups again by nine optical pickocffs 3 inside each array, every group of three optical pickocffs 3 are connected to one
Individual Hub is used as one-level node 6, and the connection between optical pickocff 3 and Hub is 1394 interface lines, then three one-level nodes 6 are same
Sample is applicable 1394 interface lines and is connected on same Hub as two grades of nodes 7, and thus three arrays constitute nine one-level knots altogether
Point 6 and three two grades of nodes 7.
Be located at the position of main array optical system 1 due to server 4, and two groups of secondary array optical systems 2 cannot directly with
Server 4 is connected, even and if be connected can also produce larger time delay.Therefore, it is shown in Figure 4, by two groups of secondary array optical systems
1394 buses that the two-level node of system 2 is drawn connect kilomega network by converter, and kilomega network end converts a signal into 1394b again
EBI.Most the signal direct-connected all the way and two-way of the output of main array optical system 1 pass through through the signal that kilomega network is changed at last
On 1394b buses access server 4.
Step 3, installs image capture software, configures the parameter under major and minor array optical system mixed exposure.
So-called mixed exposure strategy refers to two kinds of high frame rate short exposure time and the low frame rate rate fast time for exposure long of setting
Exposure strategies are used in combination in many array of optical sensors.It is the short exposure of high frame rate to set two secondary array optical systems 2
Light time, main array optical system 1 is the low frame rate rate time for exposure long.
High speed optical sensor with high frame rate short exposure time can catch time critical target, realize to quick mobile
The image for tracking and obtaining of target is not in fuzzy problem, with temporal resolution higher.The speed exposure long of low frame rate rate
Time parameter method lower speed optical sensor can as far as possible obtain the details in image, realize high dynamic, high-resolution imaging, tool
There is space point ratio higher.In general, it is phase that acquisition system is obtained between the temporal resolution and spatial resolution of image
Mutual contradiction, but the present invention width many array optical detection systems of baseline are utilized, by multiple optic sensor array using mixed
Exposure strategies are closed, both are combined can both obtain spatial resolution higher, while having temporal resolution higher.This hair
Main array optical system 1 can obtain high dynamic, high-definition picture, two pairs in the bright many array optical detection systems of baseline wide
The one side of array optical system 2 expands the observation visual field of main array optical system 1 and there is provided range information, the opposing party's mask
There is the ability that tracking time critical target captures fast moving objects.
3.1) optical pickocff bottom layer driving software FlyCapture2.0 is installed on server 4, confirms that 27 optics are passed
Sensor 3 is all in the case of detection successfully, installs top layer images acquisition software Streampix5.0, soft by Streampi5.0
Part monitors 27 working conditions of optical detection sensor 3 simultaneously.
3.2) first time IMAQ is carried out by main array optical system 3 and two secondary array optical systems 2, has been gathered
Cheng Hou, 5 are adjusted to by the ratio between time for exposure of the time for exposure of main array optical system and each secondary array optical system:1, will
The ratio between the frame speed of main array optical system and the frame speed of each secondary array optical system are adjusted to 5:1.
Time for exposure 5：1 ensures that main array and secondary array image were unlikely to bright and excessively dark, that is, no more than image
Dynamic range.Under the dynamic range no more than image, scaling up as far as possible, but too high ratio reduces image synchronization
Precision, frame rate ratio and time for exposure ratio are consistent the limitation for being in order at many exposure syncs.
Nine image sizes of optical pickocff 3 are 1024 × 768 in main array optical system 1, it is considered to which external trigger is drawn
The frame rate abatement for entering, its frame rate is reduced to 13fps from nominal 15fps；18 optics in two secondary array optical systems 2
The image size of sensor 3 is 640 × 480, it is considered to which the frame rate abatement that external trigger is introduced, its frame rate is from nominal 30fps
It is reduced to 26fps；
Nine data volumes of optical pickocff 3 are l in main array optical system 11：
l1=1024*768*8bit*13fps*9/1024/1024/8=87.75MB/s (1)
Nine data volumes of optical pickocff 3 are l in single secondary array optical system 22：
l2=640*480*8bit*26fps*18/1024/1024/8=68.55MB/s (2)
The single data volume of secondary array optical system 2 is respectively less than peak value 100MB/s, therefore can realize being gathered without frame losing.
The total amount of data of the secondary array optical systems 2 of main array optical system 1 and two is：
l3=87.75MB/s+68.55MB/s*2=224.86MB/s (3)
27 optical pickocffs 3 are all connected to normal work 1 hour on server 4, and server 4 is per second data：
l4=224.86MB/s*60*60/1024=790.52GB/h (4)
Server 4 is per second need to read in data volume for 224.86MB/s, and in order to improve the storage performance of disk, the present invention is by adopting
The mode of multiple disk parallel execution of data requests is taken, to meet the temporal read of interior data per second, every piece of wink of disk stabilization
When writing speed be 35MB/s, it is necessary to disk number be：224.86/35=7 blocks, and to ensure that Array Disk will not overflow most
Eight pieces of disks are selected eventually, it is one of as redundancy, i.e., RAID0 is with eight pieces of disks to ensure that moment writes data volume.In order to
Meet the requirement of data collecting system data volume per hour, every piece of Capacity Selection 1TB of disk, after eight pieces of block disk RAID0
Capacity be 8TB, the capacity of 790.52GB per hour can be met.
3.3) two kinds of synchronous triggering signals are given, external trigger circuit is installed.
Using signal generator 5 as signal source, output it signal and be set as two kinds of square waves of same-phase different frequency,
Output amplitude is 5V.
Will export high-frequency square-wave signal access TTL/485 converters, then by conversion after 485 interface signals access multichannel
Adapter, multiplex adapter will be divided into the interface signal of two-way 485 by signal all the way, and 485 interface signals that will finally export are accessed
485/TTL converters export TTL signal, and two paths of signals is connected on two secondary array optical systems 2 respectively, per road TTL signal connection 9
Road optical pickocff triggering line traffic control optical pickocff triggering；The low-frequency square-wave signal that will be exported accesses TTL/485 converters, then
485 interface signals for exporting are gone back into TTL signal by 485/TTL converters, main array optical system 1 is accessed, 9 road light are connected
Learn the triggering of sensor-triggered line traffic control optical pickocff.
Because optical pickocff triggering line length is generally 2 meters or so, and main array optical system 1 and each secondary array
Two-by-two at a distance of 80 meters between optical system 2, therefore 485 interface signal lines of the length more than 80 meters need to be selected.By signal generator 5
With the position that multiplexer is placed in main array optical system 1, multiplexer is connected from 100 meter of 485 interface signal line
To two groups of signals of the secondary output of array optical system 2.
Wherein, TTL/485 converters and 485/TTL converters need to provide 5V dc sources, and multiplexer needs to provide
12V.The TTL signal voltage of final output is 5V, and size of current is 70mA or so, it is sufficient to ensured per group pattern normal work.
There are following three points points for attention during hard triggers circuit is connected：The signal of first, 485/TTL converter output
It is TTL signal, optical pickocff 3 will be directly connected into after this is signally attached into optical pickocff firing line.To prevent damaging light
Sensor is learned, it is necessary to access oscillograph observation signal amplitude and signal waveform first, it is ensured that signal is square wave and amplitude is 5V；The
Two, 485/TTL converter, TTL/485 converters have two kinds of different ground wires of signal ground and power supply ground, two kinds with multiplexer
Ground wire hybrid junction can cause output square-wave signal have larger noise jamming；3rd, optical pickocff firing line one end is connected to optics
The outside of sensor 3 is touched on mouth, another to terminate on TTL signal source, and being connected on signal source one end will connect holding wire and letter respectively
Number ground wire, notices that green line connects holding wire purple line and connects signal ground, and the reversed triggering timing error that may result in even is damaged
Optical pickocff 3.
3.4) software time delay is introduced, the parameter of optical pickocff 3 is debugged.
Optical pickocff exposure time series figure is as shown in fig. 6, the external trigger mode of optical pickocff 3 is rising edge triggering.
When the square-wave signal of the output of signal generator 5 arrives, trigger signal first passes around the time delay of transmission line, is passed followed by optics
Sensor 3 is the optical pickocff time delay of response trigger signal.Because the transmission range of signal is different, therefore will necessarily there is transmission
Line time delay.Simultaneously because being had differences between each optical pickocff 3, response delay when optical pickocff 3 is gathered also cannot
Eliminate.The optical pickocff 3 caused to offset above two time delay gathers asynchronous problem, can be different optical pickocff people
To introduce time delay.
Streampix5.0 softwares are set first, setting options wherein, the automatic life of image will be gathered
Name mode adds the IMAQ moment, and thus we can judge that all optical pickocffs 3 are according to the time tag on picture
It is no to gather image in synchronization.The frame rate of the setting collection of optical pickocff 3 and time for exposure, then carry out an image
Collection.
After the completion of collection, IMAQ moment of each optical pickocff 3 under same square-wave signal is recorded, to postpone most
On the basis of big optical pickocff 3, software delays are added to other optical pickocffs 3.
Add software delays method be：Choose the package delay choosings in bottom layer driving software FlyCapture2.0
, then the trigger delay options in top layer images acquisition software Streampix5.0 are chosen, and according to try and
The computational methods of error, are that trigger delay options select suitable parameter, to ensure that each optics inside array is passed
Error amount between the collection moment of sensor is less than 1ms.
3.5) on the basis of the width many array optical detection system synchronous acquisitions of baseline of the invention, using Streampix5.0
Gather one group of image, the image that 27 optical pickocffs 3 of contrast are collected, it is ensured that many array optical detection systems of present invention width baseline
Unite no frame loss condition.For the frame losing phenomenon of frame rate initiation higher, in need to adjusting bottom layer driving FlyCapture2.0 softwares
Dragpackage parameters, single optical pickocff 3 is monitored using FlyCapture2.0.
The size of the display adjustment dragpackage parameters according to FlyCapture2.0, until the image for showing is without frame losing
Untill situation.The dragpackage parameters after adjustment are write down, is found corresponding in top layer images acquisition software Streampix5.0
Dragpackage parameters, it is ensured that the parameter in two softwares is consistent.Finally, the bright dark situation according to scene is passed to optics
The small parameter perturbations such as aperture, the white balance of sensor 3 so that the image color seen in top layer Streampix5.0 software monitors with it is bright
Degree is proper, i.e., without departing from the dynamic range of optical pickocff, this completes the present embodiment many array opticals of baseline wide
The structure of detection system.
IMAQ, major and minor array light are carried out using many array optical detection systems of baseline wide built in the embodiment
System uses the different time for exposure, and so as to realize that high dynamic is imaged, two secondary array optical systems 2 are gathered in synchronization
Image respectively as figures 8 a and 8 b show；The image of the collection of main array optical system 1 of synchronous acquisition as shown in Figure 8 c, recovers
Moving-target image afterwards is as shown in figure 8d；From Fig. 8 d, many array optical detection systems of baseline wide of the invention merge many times
Row, many exposures, multi-view image realize high dynamic imaging, with the ability for solving motion blur.
The present invention is directed to airborne optical detection system aloft work environment, and big visual field, height are met simultaneously with long-range detection
Differentiate, high dynamic and various visual angles require to be target.The airborne optical detection system observation for effectively overcoming traditional structure for pod is regarded
Small, target information is few, the shortcomings of optical field of view and conflicting resolution ratio, hence it is evident that improve the inspection to target under complex environment
Survey, track, recognize and battle field situation precision, have important meaning to the development of airborne optical detection system.
Claims (2)
1. the method to set up of many array optical detection systems of a kind of baseline wide, it is characterised in that specifically implement according to following steps：
Step 1, in server（4）Upper installing bottom layer drive software FlyCapture2.0 and top layer images acquisition software
Streampix5.0；
Step 2, by main array optical system（1）With two secondary array optical systems（2）First time IMAQ is carried out, is gathered
After the completion of, the ratio between time for exposure of the time for exposure of main array optical system and each secondary array optical system is adjusted to 8:1~
3:1, the ratio between frame speed of the frame speed of main array optical system and each secondary array optical system is adjusted to 8:1~3:1；
Step 3, by signal generator（5）Two kinds of square waves of same-phase different frequency of output, high-frequency square-wave signal triggering therein
Main array optical system（1）, the secondary array optical systems of low-frequency square-wave signal triggering two therein（2）；
Step 4, optical pickocff（3）The synchronous adjustment of acquisition time：
Step 4.1, in the setting options of top layer images acquisition software Streampix5.0, will gather the automatic life of image
Name mode adds the IMAQ moment；
Step 4.2, by main array optical system（1）With two secondary array optical systems（2）Second IMAQ is carried out, is adopted
After the completion of collection, that is, obtain each optical pickocff in same array（3）The IMAQ moment under same square-wave signal, with
Postpone maximum optical pickocff（3）On the basis of, to remaining optical pickocff（3）Enter line delay adjustment；
Step 4.3, repeat step 4.2, until different optical pickocffs in array（3）Between the error at IMAQ moment be less than
Untill 1ms；
Step 5, through step 4 to optical pickocff（3）After the synchronous adjustment of acquisition time, then by main array optical system（1）
With two secondary array optical systems（2）Third time IMAQ is carried out, each optical pickocff is contrasted（3）The image for collecting,
If occurring frame losing phenomenon in image, adjust parameter dragpackage's in bottom layer driving software FlyCapture2.0
Numerical value is X so that the image for collecting, then will be corresponding in top layer images acquisition software Streampix5.0 without frame losing phenomenon
The numerical value of dragpackage parameters is also adjusted to X；
If without frame losing phenomenon in the image, without adjustment；
Step 6, by the adjustment of step 5 after, further according to the bright dark situation of scene of image that third time is collected, to each light
Learn sensor（3）Aperture, white balance parameter is finely adjusted so that the color of the image for collecting for the third time and brightness without departing from
Optical pickocff（3）Dynamic range, that is, complete the structure of many array optical detection systems of baseline wide.
2. method to set up as claimed in claim 1, it is characterised in that in described step 4.2, to remaining optical pickocff
Postpone adjustment specific method be：
The package delay options in bottom layer driving software FlyCapture2.0 are chosen, then chooses top layer images acquisition software
Trigger delay options in Streampix5.0, are that trigger delay options select suitable parameter, to ensure battle array
The collection moment of each optical pickocff inside row is identical.
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