CN108896279A - A kind of autonomous matching test system of super quick dynamic middle imaging space camera integration time - Google Patents
A kind of autonomous matching test system of super quick dynamic middle imaging space camera integration time Download PDFInfo
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- CN108896279A CN108896279A CN201810579306.5A CN201810579306A CN108896279A CN 108896279 A CN108896279 A CN 108896279A CN 201810579306 A CN201810579306 A CN 201810579306A CN 108896279 A CN108896279 A CN 108896279A
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
A kind of autonomous matching test system of super quick dynamic middle imaging space camera integration time, including space camera subsystem, camera ground detection subsystem, parallel light tube, dynamic scenery simulates subsystem, space camera subsystem includes camera main-body, camera electronics, camera main-body includes camera lens, camera focal plane, braced frame, camera electronics includes camera integrated electronics unit, image processing unit, ground detection subsystem includes control detection unit, image acquisition units, it includes the low disturbance shaft target of high-precision that dynamic scenery, which simulates subsystem, target control system, host computer.Camera integration time of the present invention uses external trigger form, realizes that camera integration time and simulation scenery are moved to association；From test macro angle, delay is eliminated in such a way that software and hardware combines, and is realized the synchronism of simulation scenery movement and camera imaging, is guaranteed the adequacy of ground test verification test.
Description
Technical field
The present invention relates to when a kind of space optics technical field of imaging, especially super quick dynamic middle imaging space camera integration
Between autonomous matching test system.
Background technique
Traditional remote sensing satellite imaging pattern be platform stance it is motor-driven in place after, camera just starts to be imaged.Recently as appearance
The development of control technology, the mobility and stability of remote sensing satellite are continuously improved, it will realize super quick dynamic middle imaging pattern, it can be big
Width improves the effective information density that satellite obtains, and improves flexibility and observed efficiency that satellite uses, has important application prospect.
However, existing terrestrial test environment and test method are not enough to camera integration time when to super quick dynamic middle imaging
Autonomous matching performance carry out validity test.It is super it is quick it is dynamic in imaging when projection speed of the camera detector on ground it is reachable~
104m/s magnitude, and consecutive variations, to the very high requirement that object simulation shaft target proposes, existing machinery formula shaft target fortune
Dynamic speed is limited, and Shortcomings (the star load TDICCD dynamic imaging full physical simulation in terms of control precision and rotational stability
System design, Liu, Sun Zhiyuan, golden light, optical precision engineering, 2011:19(3)；A kind of mould of TDI CCD camera dynamic imaging
Quasi- device, CN200910067547.2, Liu, Dai Lu are opened slowly)；Target motion state is difficult to simulate the imaging of various complexity
Mode；In addition, can not exact correlation between the time of integration and shaft target motion of existing camera, it is difficult to synchronous to the time of integration
Precision and dynamic middle imaging performance carry out quantitative evaluation (design of space TDICCD camera dynamic imaging ground detection system, Zheng
Geng Feng, Zhang Ke, Han Shuanli, Jin Longxu, Liang Wei, optical precision engineering, 2010:18(3)).Problem above limits super quick dynamic
When middle imaging, independently matched ground validation and the test of the space camera time of integration.
Summary of the invention
Present invention solves the technical problem that being：It is empty a kind of super quick dynamic middle imaging has been overcome the deficiencies of the prior art and provide
Between the autonomous matching test system of camera integration time, overcome mechanical rotational target revolving speed in existing test macro it is limited, control
Precision and rotational stability processed are poor, it is difficult to simulate the dynamic middle imaging pattern of various complexity, the movement of simulation scenery and camera integration
The bottleneck problems such as synchronism is poor between the time, realize that various complicated imaging patterns are especially super quick to be moved under middle imaging pattern
The in-orbit dynamic imaging performance evaluating of camera and verifying, improve remote sensing satellite and camera subsystem on-orbit performance estimate it is accurate
Property and reliability.
The technical solution of the invention is as follows：A kind of autonomous matching test of super quick dynamic middle imaging space camera integration time
System, including space camera subsystem, camera ground detection subsystem, parallel light tube, dynamic scenery simulate subsystem；
Space camera subsystem includes camera main-body, camera electronics；Camera main-body include camera lens, camera focal plane,
Directional light from parallel light tube is converged at camera focal plane by braced frame, camera lens, and camera focal plane believes image data light
It number is converted into image data electric signal, braced frame is for connecting camera lens and camera focal plane；Camera electronics includes camera
Integrated electronics unit, image processing unit, integrated electronics unit is received controls detection unit in ground detection subsystem
The time of integration external trigger signal in the camera focal plane row period of control instruction, dynamic scenery simulation subsystem, controls camera focal plane
Imaging parameters, and control camera focal plane and return to the camera focal plane imaging parameters in imaging process, camera focal plane working condition amount
Control detection unit is given, image processing unit receives camera focal plane and sends image data electric signal, and carries out to image data excellent
The image acquisition units of ground detection subsystem are sent to after change processing；
Ground detection subsystem includes control detection unit, image acquisition units, and control detection unit simulates the star of whole star
Business system sends control instruction to the integrated electronics unit of camera electronics, and ginseng is imaged in the camera focal plane received in imaging process
Number, camera focal plane working condition amount, image acquisition units simulate the Data transfer system of whole star, receive and send from image processing unit
Optimization processing after image data；
The light that the pattern of shaft target surface issues is changed into directional light by parallel light tube, and allows directional light by phase
Machine camera lens receives；
It includes the low disturbance shaft target of high-precision, target control system, host computer that dynamic scenery, which simulates subsystem,；In high precision
Low disturbance shaft target surface has specific pattern, and inside is placed light source, can be rotated under the control of target control system, shaft target
The optical signal that mark picture on surface issues can be received by parallel light tube；Target control system includes shaft target control circuit, turns
Axis target driving interface circuit, angle measurement circuit；Shaft target control circuit receives the rotation control information, current of host computer
The velocity of rotation of shaft target, configures the kinematic parameter of the shaft target of shaft target driving interface circuit, and will be used to control
The time of integration external trigger signal in camera focal plane row period is sent to camera electronics, and shaft target driving interface circuit is according to turning
The kinematic parameter drive shaft target motion of axis target, angle measurement circuit detect the velocity of rotation of shaft target, and measurement is believed
It number returns to target control circuit and realizes closed-loop control to shaft target motion, host computer sends to target control circuit and rotates
Control information.
The high-precision it is low disturbance shaft target requirement be：
1) shape of the low disturbance shaft target of high-precision is using cylindrical, cylindrical radius size rsimFor
Wherein, vsimIt is target linear velocity at parallel light tube entrance pupil focal plane, ωsimIt is the angular speed of shaft target, fparaIt is
The focal length of parallel light tube, vdetIt is magazine image planes speed, τ is the minimum integration time, and f is the focal length of camera, θminIt is coding
The minimum angles that device can detecte；
2) the low disturbance shaft target material of high-precision uses micro crystal material, and cylindrical inside is hollow configuration, can place light source,
Cylindrical outer surface uses grid type well word texture, and line width is 10-30 μm；
3) angular speed meets 0.49-49.08rad/s, and angular acceleration meets 0-10.28rad/s2, and cylindrical target is tangential
Velocity error≤0.5 ‰, cylindrical target tangential, axial flutter amplitude≤0.5 μm, the diameter of shaft target is 61.11mm.
The linear velocity at target edge at focal surface of collimator tube is 15-1500mm/s, acceleration 0-310mm/
s2。
The focal length of the parallel light tube is 12m, and bore 1.5m, field angle is 0.2 °.
The camera focal plane is the cmos detector detector for having the time delay integration of bilateral scanning function, detection
7 μm of device pixel dimension 7x, pixel number 3200, detector time of integration adjusting range are 4~1000 μ s, gain adjustment range 1.0
~8.0,32~128 grades of series adjusting range.
Time of integration τ, the image planes speed v of the cameradet, target linear velocity vsim, target angular velocity omegasimCalculating
Method is：
Wherein, d is the Pixel size of detector,It is the radius vector that ground target is directed toward from camera mass center, H indicates modulus, f
It is the focal length of camera,It is substar projection speed,It is the motor-driven angular speed of camera.| | | | symbol indicates modulus, ⊥ symbol table
Show the relative velocity of tested atural object and satellite in the component in rail direction that hangs down, fparaIt is the focal length of parallel light tube.
The 90%~95% of camera DN value when DN value is not less than saturation when the described camera imaging.
The driving framework of the shaft target is that the rotation of weaving based on host computer controls information drive shaft target
Mark movement, the framework can simulate the super quick dynamic middle imaging pattern under various true in-orbit scenes；
The time of integration external trigger signal in the output camera focal plane row period of the shaft target control circuit is using soft
The mode that hardware combines controls the delay of shaft target and camera integration time, guarantees the synchronism of imaging time.
Based on the autonomous matching test system of a kind of super quick dynamic middle imaging space camera integration time described in claim 1
Test method includes the following steps：
(1) the low disturbance shaft target of high-precision after dynamic scenery simulation subsystem powers on, target control system, host computer into
Row self-test is simulated subsystem control system by rear dynamic scenery and is initialized；
(2) health status self-test is carried out after camera subsystem powers on, it is initial to complete parameter setting by rear camera electronics
Change, waits the time of integration external trigger signal in camera focal plane row period, the row period of camera focal plane, phase when controlling camera imaging
Machine subsystem enters imaging standby mode；
(3) host computer of dynamic scenery simulation subsystem is loaded into the rotation control information woven, controls system by target
System realizes the accurate control of disturbance shaft target low to high-precision, and target control system is by the time of integration in camera focal plane row period
External trigger signal is sent to camera electronics, and the low disturbance shaft target of high-precision is placed in parallel light tube entrance pupil position of focal plane, target
Optical signalling is marked by that can be received by camera main-body after parallel light tube；
(4) after camera electronics receives the time of integration external trigger signal in camera focal plane row period, phase owner is controlled
Shaft target is imaged in body, and the image data that camera electronics will acquire is output in image capture device, and camera subsystem
Camera focal plane imaging parameters, camera focal plane working condition amount return control detection unit.The control of dynamic scenery simulation subsystem
Circuit processed also includes Postponement module, guarantees that target motion is synchronous with camera integration time, camera integration time is for controlling phase
In the row period of machine focal plane, target motion can guarantee when synchronous with the time of integration obtains correct image data；
(5) image processing unit receives camera focal plane and sends image data electric signal, and optimizes place to image data
The image acquisition units of ground detection subsystem are sent to after reason, the detection unit controlled in ground detection subsystem simulates whole star
Satellited system, control the image acquisition units in ground detection subsystem and simulate the Data transfer system of whole star, receive and come from image
Image data after the optimization processing that processing unit is sent；
(6) after task, the shaft target of dynamic scenery simulation subsystem stops working, and camera enters standby mode,
When thering is new rotation control information to be loaded into, it is transferred to step 3), until completing test.
The advantages of the present invention over the prior art are that：
(1) present invention overcomes traditional mechanical rotational target in control precision using the low disturbance shaft target of high-precision
It is insufficient with flutter stability etc., superhigh precision and ultralow disturbance are realized, between real simulation camera and tested atural object
Relative motion lays the foundation for in-orbit dynamic middle imaging；
(2) present invention directly runs the framework that assignment file controls shaft target using host computer, can simulate
Various complicated super quick dynamic middle imaging patterns.Target revolving speed can not adjust in real time during traditional test, therefore can only be qualitatively
Time of integration synchronization accuracy and imaging performance are evaluated, and the method for the above mission planning can be quantitatively to the time of integration
Synchronization accuracy and trend imaging performance are evaluated；
(3) camera integration time of the present invention use external trigger form, realize camera integration time and simulation scenery move to
Association；From test macro angle, delay is eliminated in such a way that software and hardware combines, and realizes the movement of simulation scenery and camera
The synchronism of imaging guarantees the adequacy of ground test verification test.
Detailed description of the invention
Fig. 1 is the time of integration autonomous matching test system schematic, 1- camera main-body, 2- camera electronics, 3- camera
Subsystem is detected in face, and 4- controls detection unit, 5- image acquisition units, 6- parallel light tube, 7- shaft target, 8- target control system
System, 9- shaft target driving interface circuit, 10- shaft target control circuit, 11- angle measurement circuit, 12- host computer, 13- appoint
Business planning file.
Specific embodiment
In view of the deficiencies of the prior art, the present invention proposes a kind of super quick dynamic middle imaging spaces camera integration time autonomous
Subsystem is simulated with test macro, including space camera subsystem, camera ground detection subsystem, parallel light tube and dynamic scenery
Four parts.
Space camera subsystem includes camera main-body and camera electronics.Camera main-body includes camera lens, camera focal plane
And braced frame.Directional light from parallel light tube is converged at camera focal plane by camera lens, and camera focal plane converts optical signal
For electric signal, each section is formed the structural body of a completion for connecting camera lens and camera focal plane by braced frame；Camera
Electronics includes camera integrated electronics unit and image processing unit.Integrated electronics unit receives in ground detection subsystem
The instruction of detection unit is controlled, controls camera imaging process, and by the various state telemetering amounts in camera subsystem imaging process
Return to control detection unit, image processing unit is used to receive the image data of camera focal plane, and to image real time transfer after
It is sent to the image acquisition units of ground detection subsystem.
Ground detection subsystem includes control detection unit (please adaptation position replenishment control detection unit hereinafter
The course of work) and image acquisition units (the please course of work of adaptation position supplemental image acquisition unit hereinafter)；Control
Detection unit is used to simulate the satellited system of whole star, sends control instruction to the integrated electronics unit of camera electronics, receives and
Various state telemetering amounts from integrated electronics unit about camera main-body and camera electronics；Image acquisition units are whole for simulating
The Data transfer system of star receives the image data from image processing unit.
Parallel light tube is used to the light that the pattern of shaft target surface issues being changed into directional light, and directional light can be by camera
Camera lens receives.
It includes the low disturbance shaft target of high-precision, target control system, host computer that dynamic scenery, which simulates subsystem,.In high precision
Low disturbance shaft target surface has specific pattern, and inside is placed light source, can be rotated under the control of target control system, shaft
The optical signal that target surface pattern issues can be received by parallel light tube；Target control system includes shaft target control circuit,
Shaft target driving interface circuit, angle measurement circuit.Shaft target control circuit is matched for receiving the information from host computer
The kinematic parameter of shaft target is set, and the time of integration external trigger signal for being used to control the TDI detector row period is sent to phase
Machine electronics；The driving parameter shaft target motion of shaft target driving interface circuit reception shaft target control circuit；Angle
Measuring circuit is used to detect the velocity of rotation of shaft target, and measuring signal is returned to target control circuit and is realized to shaft target
The closed-loop control of movement.Host computer is used to send the information such as instruction, mission planning file to target control circuit.
A kind of autonomous matching test system of super quick dynamic middle imaging space camera integration time, the course of work are as follows：
1) dynamic scenery simulation subsystem powers on rear each unit status and carries out self-test, simulates subsystem by rear dynamic scenery
Control system is initialized；
2) health status self-test is carried out after camera subsystem powers on, it is initial to complete parameter setting by rear camera electronics
Change, waits time of integration external trigger signal, the row period of TDI detector when which is used to control camera imaging.Camera divides
System enters imaging standby mode；
3) host computer of dynamic scenery simulation subsystem is loaded into the mission planning file woven, and this document passes through target control
System processed realizes the accurate control of disturbance shaft target low to high-precision.Target control system believes time of integration external trigger simultaneously
Number it is sent to camera electronics；Low disturbance shaft target is placed in parallel light tube entrance pupil position of focal plane, target optics letter in high precision
Number by that can be received by camera main-body after parallel light tube；
4) after camera electronics receives time of integration external trigger signal, shaft target is imaged in control camera main-body, phase
The image data that machine electronics will acquire is output in image capture device, and by the various state telemeterings about camera subsystem
Amount returns to control detection unit.The control circuit that dynamic scenery simulates subsystem includes Postponement module, guarantees target motion and phase
The synchronism of the machine time of integration.Here camera integration time is used to control the row period of TDI detector, only works as target motion
It just can guarantee when synchronous with the time of integration and obtain correct image data.
5) after task, the shaft target of dynamic scenery simulation subsystem stops working, and camera enters standby mode；To
When thering is new mission planning file to be loaded into, step 3) and step 4) are repeated.
The linear velocity of shaft target is 15-1500mm/s, acceleration 0-310mm/s2.
As shown in Figure 1, whole system includes space camera subsystem, ground detection subsystem, parallel light tube and dynamic scape
Object simulates four parts of subsystem.Wherein, space camera subsystem includes camera main-body 1 and camera electronics 2；Ground detection point
System includes control detection unit 4 and image acquisition units 5；It includes the low disturbance shaft target of high-precision that dynamic scenery, which simulates subsystem,
Mark 7, target control system 8 and host computer 12.Parallel light tube selected parameter is focal length 12m, bore 1.5m, field angle (2 ω)
0.2°.Shaft target 7 is considered as the magnetic suspension bearing shaft target of the low disturbance of high revolving speed high-precision.
1) control system 8 of dynamic scenery simulation subsystem and magnetic suspension bearing shaft target 7 carry out self-test, selected magnetcisuspension
Floating axle holds angular velocity range 0.49-49.08rad/s, angular acceleration range 0-10.28rad/s2, and the diameter of shaft target is
61.11mm, the linear velocity at target edge is 15-1500mm/s, acceleration 0-310mm/s2 at focal surface of collimator tube；Self-test
It is initialized by the control system 8 that rear dynamic scenery simulates subsystem；
2) camera carries out health status self-test, is initialized by rear to camera electronics 2.Typically camera parameter is
Focal length 14m, bore 1.25m, to meet super quick dynamic middle imaging demand, using the time delay integration for having bilateral scanning function
(TDI) cmos detector detector, 7 μm of detector pixel dimension 7x, pixel number 3200, the detector time of integration adjust model
Enclose 4~1000 μ s, gain adjustment range 1.0~8.0,32~128 grades of series adjusting range.Camera integrated electronics learning aid is standby to be received
The ability of time of integration external trigger signal triggers camera when port is high level outside and is kept into as waiting；Camera initialization ginseng
Number can choose default and increase to 1.0, default 64 grades of series；The quantization digit of camera selects 10bits；
3) it is advised using spacecraft orbit task corresponding with (the STK software of such as AGI company) establishment of Attitude Simulation model
It draws, as shown in table 1.The attitude data of satellite is obtained according to appearance rail model, according to formula (1), formula (2) obtains the integral of camera
Time τ and image planes speed vdetRelationship：
Wherein, d is the Pixel size of detector,It is the radius vector that ground target is directed toward from camera mass center, H indicates modulus, f
It is the focal length of camera,It is substar projection speed,It is the motor-driven angular speed of camera.| | | | symbol indicates modulus, ⊥ symbol table
Show the relative velocity of tested atural object and satellite in the component in rail direction that hangs down.According to above formula, formula (3) and formula (4) are utilized
It can may further obtain the corresponding linear velocity v of targetsimAnd angular velocity omegasim,
Wherein, fparaIt is the focal length of parallel light tube, f is the focal length of camera, rsimIt is the radius of shaft target.
The signal of 1 mission planning file of table
The host computer 12 that dynamic scenery simulates subsystem is loaded into 1 content of table, and related data is sent in control system 8
Control circuit 10 controls magnetic suspension bearing shaft target 7 by driving interface circuit 9 and moves, and angle measurement circuit 11 is examined in real time
Survey target, which transfers and will test signal, sends the progress feedback control of control circuit 10 back to.Angle detects the encoder that can select 32k
It realizes.Control circuit 10 sends real-time time of integration pulse to camera electronics 2 simultaneously and controls camera imaging.In view of dynamic
Object simulation subsystem drives the delay between the mark of magnetic suspension bearing shaft target 7 and camera imaging, is in dynamic scenery simulation point
Integrated delay module is set in the control circuit 10 of system, guarantees camera integration time and 7 movement of magnetic suspension bearing shaft target
Between synchronism；
4) the 90%~95% of DN value when guaranteeing DN value when camera imaging not less than saturation, when being quantified using 10bits, just
The range of DN is between 920~975 when often working.When receiving time of integration external trigger signal, camera imaging starts, and passes through phase
Image that machine electronics 2 will acquire simultaneously is stored in image acquisition units 5.To guarantee data normal storage, data bandwidth is not small
In 8Gbps；
5) after task, dynamic scenery simulate subsystem magnetic suspension bearing shaft target 7 under damping action gradually
Slow down, dynamic scenery simulation subsystem control circuit 10 stop to camera export time of integration trigger signal, camera stop at
Picture, into standby mode.
A kind of autonomous matching test system of super quick dynamic middle imaging space camera integration time, including space camera divide and are
System, camera ground detection subsystem, parallel light tube, dynamic scenery simulate subsystem.Wherein space camera subsystem is by phase owner
Body and camera electronics composition；Ground detection subsystem is made of control detection unit and image acquisition units；Dynamic scenery mould
Quasi- subsystem is by shaft target, target control system and host computer composition；
The configuration design of shaft target uses cylinder design, and cylindrical radius size rsim is set according to following formula
Meter.When whole system uses parallel light tube focal length for 12m, camera focus 14m, the detector minimum integration time is 4 μ s, coding
When device digit is 32k, cylinder-shaped shaft target diameter should be 61.11mm.The configuration design can be with analog satellite orbit altitude
500km, controllable velocity are 6 °/s, super quick limiting condition when acceleration is 1.5 °/s2；
Wherein, rsimIt is the radius of shaft target, vsimIt is target linear velocity at parallel light tube entrance pupil focal plane, ωsimIt is shaft
The angular speed of target；fparaIt is the focal length of parallel light tube, vdetIt is magazine image planes speed, τ is the minimum integration time, and f is phase
The focal length of machine, θminIt is the minimum angles that encoder can detecte；
The mark driving method of shaft target is the low disturbance magnetic suspension bearing driving of high-precision, angular speed claimed range 0.49-
49.08rad/s, angular acceleration claimed range 0-10.28rad/s2, cylindrical target tangential velocity error≤0.5 ‰, cylinder
Target tangential, axial flutter amplitude≤0.5 μm；
The material of shaft target uses micro crystal material, and cylindrical inside is hollow configuration, can place light source；Cylindrical outer surface
Using grid type " well " word grain design, line width is 10-30 μm；
The driving framework of shaft target is that the target control system of the mission planning file based on host computer drives, the framework
The super quick dynamic middle imaging pattern under various true in-orbit scenes can be simulated；
The output signal of shaft target control circuit controls shaft target and camera product in such a way that software and hardware combines
Delay between timesharing guarantees the synchronism of imaging time.
The content that description in the present invention is not described in detail belongs to the well-known technique of those skilled in the art.
Claims (10)
1. a kind of autonomous matching test system of super quick dynamic middle imaging space camera integration time, it is characterised in that including space phase
Machine subsystem, camera ground detection subsystem, parallel light tube, dynamic scenery simulate subsystem；
Space camera subsystem includes camera main-body, camera electronics；Camera main-body includes camera lens, camera focal plane, support
Directional light from parallel light tube is converged at camera focal plane by frame, camera lens, and camera focal plane turns image data optical signal
Image data electric signal is turned to, braced frame is for connecting camera lens and camera focal plane；Camera electronics includes that camera is comprehensive
Electronic unit, image processing unit, integrated electronics unit receive the control that detection unit is controlled in ground detection subsystem
The time of integration external trigger signal in the camera focal plane row period of subsystem, control camera focal plane imaging are simulated in instruction, dynamic scenery
Parameter, and control camera focal plane and the camera focal plane imaging parameters in imaging process, camera focal plane working condition amount are returned into control
Detection unit processed, image processing unit receives camera focal plane and sends image data electric signal, and optimizes place to image data
The image acquisition units of ground detection subsystem are sent to after reason；
Ground detection subsystem includes control detection unit, image acquisition units, and control detection unit simulates the Star Service system of whole star
System sends control instruction to the integrated electronics unit of camera electronics, camera focal plane imaging parameters, phase in reception imaging process
Machine focal plane working condition amount, image acquisition units simulate the Data transfer system of whole star, and reception sends excellent from image processing unit
Image data after change processing；
The light that the pattern of shaft target surface issues is changed into directional light by parallel light tube, and allows directional light by camera mirror
Head receives；
It includes the low disturbance shaft target of high-precision, target control system, host computer that dynamic scenery, which simulates subsystem,；It is low in high precision to disturb
Turn axis target surface has specific pattern, and inside is placed light source, can be rotated under the control of target control system, shaft target table
The optical signal that face pattern issues can be received by parallel light tube；Target control system includes shaft target control circuit, shaft target
Mark driving interface circuit, angle measurement circuit；The rotation that shaft target control circuit receives host computer controls information, current spindle
The velocity of rotation of target, configures the kinematic parameter of the shaft target of shaft target driving interface circuit, and will be used to control camera
The time of integration external trigger signal in focal plane row period is sent to camera electronics, and shaft target driving interface circuit is according to shaft target
Target kinematic parameter drive shaft target motion, angle measurement circuit detect the velocity of rotation of shaft target, measuring signal are returned
The closed-loop control to shaft target motion is realized back to target control circuit, and host computer sends rotation control to target control circuit
Information.
2. the autonomous matching test system of the super quick dynamic middle imaging space camera integration time of one kind according to claim 1,
It is characterized in that：The high-precision it is low disturbance shaft target requirement be：
1) shape of the low disturbance shaft target of high-precision is using cylindrical, cylindrical radius size rsimFor
Wherein, vsimIt is target linear velocity at parallel light tube entrance pupil focal plane, ωsimIt is the angular speed of shaft target, fparaIt is directional light
The focal length of pipe, vdetIt is magazine image planes speed, τ is the minimum integration time, and f is the focal length of camera, θminIt is that encoder can be with
The minimum angles detected；
2) the low disturbance shaft target material of high-precision uses micro crystal material, and cylindrical inside is hollow configuration, can place light source, cylinder
Outer surface uses grid type well word texture, and line width is 10-30 μm；
3) angular speed meets 0.49-49.08rad/s, and angular acceleration meets 0-10.28rad/s2, cylindrical target tangential velocity
Error≤0.5 ‰, cylindrical target tangential, axial flutter amplitude≤0.5 μm, the diameter of shaft target is 61.11mm.
3. the autonomous matching test system of the super quick dynamic middle imaging space camera integration time of one kind according to claim 2,
It is characterized in that：The linear velocity at target edge at focal surface of collimator tube is 15-1500mm/s, acceleration 0-
310mm/s2。
4. the autonomous matching test system of the super quick dynamic middle imaging space camera integration time of one kind according to claim 3,
It is characterized in that：The focal length of the parallel light tube is 12m, and bore 1.5m, field angle is 0.2 °.
5. the super quick dynamic middle autonomous matching test system of imaging space camera integration time of one kind according to claim 1 or 2
System, it is characterised in that：The camera focal plane is the cmos detector detection for having the time delay integration of bilateral scanning function
Device, 7 μm of detector pixel dimension 7x, pixel number 3200, detector time of integration adjusting range are 4~1000 μ s, gain adjustment
Range 1.0~8.0,32~128 grades of series adjusting range.
6. the super quick dynamic middle autonomous matching test system of imaging space camera integration time of one kind according to claim 1 or 2
System, it is characterised in that：Time of integration τ, the image planes speed v of the cameradet, target linear velocity vsim, target angular velocity omegasim
Calculation method be：
Wherein, d is the Pixel size of detector,It is the radius vector that ground target is directed toward from camera mass center, H indicates modulus, and f is phase
The focal length of machine,It is substar projection speed,It is the motor-driven angular speed of camera.| | | | symbol indicates modulus, and ⊥ symbol indicates quilt
The relative velocity of geodetic object and satellite is in the component in rail direction that hangs down, fparaIt is the focal length of parallel light tube.
7. the autonomous matching test system of the super quick dynamic middle imaging space camera integration time of one kind according to claim 1,
It is characterized in that：The 90%~95% of camera DN value when DN value is not less than saturation when the described camera imaging.
8. the autonomous matching test system of the super quick dynamic middle imaging space camera integration time of one kind according to claim 1,
It is characterized in that：The driving framework of the shaft target is that the rotation of weaving based on host computer controls information drive shaft
Target motion, the framework can simulate the super quick dynamic middle imaging pattern under various true in-orbit scenes.
9. the autonomous matching test system of the super quick dynamic middle imaging space camera integration time of one kind according to claim 1,
It is characterized in that：The time of integration external trigger signal in the output camera focal plane row period of the shaft target control circuit uses
The mode that software and hardware combines controls the delay of shaft target and camera integration time, guarantees the synchronism of imaging time.
10. based on the autonomous matching test system of a kind of super quick dynamic middle imaging space camera integration time described in claim 1
Test method, it is characterised in that：Include the following steps：
(1) the low disturbance shaft target of high-precision, target control system, host computer carry out certainly after dynamic scenery simulation subsystem powers on
Inspection is simulated subsystem control system by rear dynamic scenery and is initialized；
(2) health status self-test is carried out after camera subsystem powers on, and parameter setting initialization is completed by rear camera electronics, etc.
To the time of integration external trigger signal in camera focal plane row period, the row period of camera focal plane when controlling camera imaging, camera point
System enters imaging standby mode；
(3) host computer of dynamic scenery simulation subsystem is loaded into the rotation control information woven, passes through target control system reality
Now the accurate control of disturbance shaft target low to high-precision, target control system will touch outside the time of integration in camera focal plane row period
Signalling is sent to camera electronics, and the low disturbance shaft target of high-precision is placed in parallel light tube entrance pupil position of focal plane, target light
Signal is learned by that can be received by camera main-body after parallel light tube；
(4) after camera electronics receives the time of integration external trigger signal in camera focal plane row period, camera main-body pair is controlled
The imaging of shaft target, the image data that camera electronics will acquire is output in image capture device, and the phase of camera subsystem
Machine focal plane imaging parameter, camera focal plane working condition amount return to control detection unit.Dynamic scenery simulates the control electricity of subsystem
Road also includes Postponement module, guarantees that target motion is synchronous with camera integration time, and camera integration time is for controlling camera coke
In the row period in face, target motion can guarantee when synchronous with the time of integration obtains correct image data；
(5) image processing unit receives camera focal plane and sends image data electric signal, and after optimizing processing to image data
The image acquisition units of ground detection subsystem are sent to, the star that the detection unit in ground detection subsystem simulates whole star is controlled
Business system controls the Data transfer system that the image acquisition units in ground detection subsystem simulate whole star, receives and comes from image procossing
Image data after the optimization processing that unit is sent；
(6) after task, the shaft target of dynamic scenery simulation subsystem stops working, and camera enters standby mode, wait have
When new rotation control information is loaded into, it is transferred to step 3), until completing test.
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