CN108613661A - A kind of full light path image motion measurement system of Optical remote satellite camera - Google Patents
A kind of full light path image motion measurement system of Optical remote satellite camera Download PDFInfo
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- CN108613661A CN108613661A CN201810562848.1A CN201810562848A CN108613661A CN 108613661 A CN108613661 A CN 108613661A CN 201810562848 A CN201810562848 A CN 201810562848A CN 108613661 A CN108613661 A CN 108613661A
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- position sensor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C11/00—Photogrammetry or videogrammetry, e.g. stereogrammetry; Photographic surveying
- G01C11/02—Picture taking arrangements specially adapted for photogrammetry or photographic surveying, e.g. controlling overlapping of pictures
Abstract
The present invention discloses a kind of full light path image motion measurement system of Optical remote satellite camera, including laser displacement gauge, two direction inertia jitter-sensitive device, speculum, laser position sensor, data collection and transmission；Two direction inertia jitter-sensitive device is fixed on camera primary mirror, laser position sensor is fixed at the receiver of focal plane, the vibration attitudes vibration of camera primary mirror is converted to measurable laser signal by two direction inertia jitter-sensitive device, and laser signal receives analogue camera by laser position sensor by the reflection of speculum and is imaged full light path；The laser signal that camera primary mirrors are received along the change in displacement of two different directions and laser position sensor in the horizontal plane is measured using two laser displacement gauges be transferred to data collection and transmission analysis and calculate, obtain the full light path picture of camera and move vector.The present invention, which can overcome, vibrates the influence that posture intercouples between optical element in light path in camera, the accurate picture obtained under camera shake, micro-vibration collective effect moves vector.
Description
Technical field
The present invention relates to Optical remote satellite technical fields, and in particular to a kind of full light path picture shifting of Optical remote satellite camera
Measuring system.
Background technology
The payload camera focus of Optical remote satellite is increasingly longer, and bore is increasing, and imaging precision is higher and higher,
It is also more and more sensitive to micro-vibration and shake.When Optical remote satellite operation on orbit, all kinds of moving component (such as CMG, momentum on star
Wheel, solar wing driving mechanism etc.) normal work when the disturbance that generates, cause payload camera structure parameter to change over time
The smaller flexible deformation of amplitude, and the whole reciprocating motion smaller with respect to the amplitude changed over time to hold position, it is preceding
Person is known as micro-vibration, and the latter is known as shaking, so as to cause improper as moving.Payload imaging contexts are trembled with camera entirety
Dynamic closely related with the micro-vibration of camera internal optical element, the existing vibration isolation measure that subtracts can not thoroughly prevent the improper hair as moving
Raw, in order to accurately carry out image repair on ground, the full light path picture of accurate acquisition payload camera moves very necessary.
The Vibration Condition that camera entirety and optical element are tested using accelerometer, belongs to indirect measurement means, can only
The micro-vibration situation of qualitative evaluation camera overall jitter and optical element cannot solve to vibrate posture coupling between optical element
It influences.Therefore imaging optical path analog measurement method is used, the picture that can effectively obtain the full light path of camera imaging moves vector, is image
Quality evaluation and reparation provide reliable basis.
Currently, both at home and abroad there is not yet the reported in literature in relation to such full light path image motion measurement system.
Invention content
In view of this, the present invention provides a kind of full light path image motion measurement system of Optical remote satellite camera, can overcome
Vibrate the influence that posture intercouples in camera in light path between optical element, accurate acquisition is common in camera shake, micro-vibration
Picture under effect moves vector.
Specific embodiments of the present invention are as follows：
A kind of full light path image motion measurement system of Optical remote satellite camera, the image motion measurement system by laser displacement gauge,
Two direction inertia jitter-sensitive device, speculum, laser position sensor, data collection and transmission composition；
Two direction inertia jitter-sensitive device is fixed on camera primary mirror, and laser position sensor is fixed on focal plane receiver
The vibration attitudes vibration of camera primary mirror is converted to measurable laser signal, the laser by place, two direction inertia jitter-sensitive device
Signal is received by the reflection of speculum by laser position sensor, and the transmission path analogue camera imaging of the laser signal is complete
Light path；
Two laser displacement gauges are in same level with camera primary mirror, and camera primary mirror is measured using two laser displacement gauges
The displacement and laser position measured along the change in displacement of two different directions, two laser displacement gauges in the horizontal plane is sensitive
The laser signal that device receives is transferred to data collection and transmission, is analyzed by data collection and transmission and calculates acquisition
The full light path picture of camera moves vector.
Further, the laser position sensor is bolted to connection with focal plane receiver.
Further, the laser beam of two laser displacement gauges respectively with two coordinate system axis weights in camera primary mirror plane
It closes.
Further, the two direction inertia jitter-sensitive device is bolted to connection with camera primary mirror.
Advantageous effect：
1, present system composition be simple and convenient to operate, precision it is high, camera overall jitter passes through the laser position of external setting
It moves meter to measure, the influence of the micro-vibration of optical element is presented by light path simulation, can overcome in camera optics in light path
The influence that posture intercouples is vibrated between element, while measuring the entirety of the lateral shake and camera internal light path of camera primary mirror
Situation of change, the picture accurately obtained under camera shake, micro-vibration collective effect move vector.
2, laser position sensor and focal plane receiver of the present invention are bolted to connection, and coupling stiffness is high, can
Avoid the error introduced by laser position sensor itself vibration, precision high.
3, two direction inertia jitter-sensitive device and camera primary mirror of the present invention are bolted to connection, and reflect that primary mirror shakes with practical
Attitudes vibration in dynamic can avoid the error introduced by the vibration of two direction inertia jitter-sensitive device itself, precision high.
4, the laser beam of two laser displacement gauges of the invention respectively with two coordinate system axis weights in camera primary mirror plane
It closes, convenient for resolving the relationship between camera coordinates system and co-ordinates of satellite system, simplifies coordinate transform step.
Description of the drawings
Fig. 1 is present system composition schematic diagram.
Wherein, 1- camera main-bodies, 2- laser position sensors, the focal planes 3- receiver, 4- primary mirrors, 5- laser displacement gauge I,
6- tripods I, 7- data collection and transmission, 8- secondary mirrors, tri- mirrors of 9-, 10- two direction inertia jitter-sensitive devices, 11- laser position
Move meter II, 12- tripods II.
Specific implementation mode
The present invention will now be described in detail with reference to the accompanying drawings and examples.
The vibration of Optical remote satellite camera is divided into camera overall jitter and the micro-vibration of optical element, camera overall jitter
It is measured by the laser displacement gauge of outside setting, the micro-vibration influence of optical element is presented by light path simulation.This hair
It is bright to provide a kind of full light path image motion measurement system of Optical remote satellite camera, including camera main-body 1, laser position sensor 2,
It is focal plane receiver 3, primary mirror 4, laser displacement gauge I5, tripod I6, data collection and transmission 7, secondary mirror 8, three mirrors 9, double
To inertial shake sensor 10, laser displacement gauge II11 and tripod II12, as shown in Figure 1.
Two direction inertia jitter-sensitive device 10 can emit high focusing laser beam, and laser beam can be realized along 4 plane of primary mirror
The translation of interior two coordinate system axis directions and the rotation around two axis, it is measurable for being converted to the micro-vibration of primary mirror 4
Laser signal, the laser signal successively pass through secondary mirror 8 and three mirrors 9 reflection, can simultaneous reactions go out secondary mirror 8, three mirrors, 9 optics
The micro-vibration situation of plane effectively simulates true imaging light path.Therefore it is required that two direction inertia jitter-sensitive device 10 itself resonance frequency
Rate is higher than 1000Hz, and laser focal diameter is less than 0.5mm.
Laser position sensor 2 is used for change in location of the testing laser beam after the reflection of internal light path.Because the source of disturbing is led
Optical path change in camera is caused, finally so that laser generates certain displacement, laser position after light path on focal plane receiver 3
Sensor 2 is for measuring the displacement, to obtain the situation of change of internal light path entirety.It is required that laser position sensor 2 itself
Resonant frequency is higher than 1000Hz, and measurement accuracy is better than 0.5nm.
Data collection and transmission 7, for real-time synchronization acquisition, storage and processing laser displacement gauge I5, laser displacement
Count the measurement data of II11 and laser position sensor 2.Usually require that its sampling precision not less than 24, highest sample frequency not
It is better than 0.01Hz less than 20kHz, low-limit frequency resolution ratio.
Tripod I6 and tripod II12 can realize that height is adjusted, and have the rotation regulatory function around three axial directions, high
It spends degree of regulation and is better than 1mm.
Image source can be caused planar to generate displacement since shake occurs for camera main-body 1, by laser displacement gauge I5 and
Laser displacement gauge II11 is arranged in outside camera main-body 1, same level is in camera primary mirror 4, for measuring in horizontal plane
The displacement of both direction generally requires its test frequency range in 5Hz~1000Hz, measures according to the characteristic of satellite micro-vibration
Precision is better than 10nm.
Preferably, for the ease of resolving the relationship between camera coordinates system and co-ordinates of satellite system, two laser displacement gauges
Laser beam is overlapped with two coordinate system axis in camera primary mirror plane respectively.
Laser displacement gauge I5 is installed on tripod I6, and tripod I6 is fixed on the ground, laser displacement gauge II11 installations
Onto tripod II12, tripod II12 is fixed on the ground, and laser displacement gauge I5, laser displacement gauge II11 and primary mirror 4 are in
In same level, 4 place plane of primary mirror is X/Y plane, and the X of laser displacement gauge 5I alignment primary mirror 4 is to laser displacement gauge II11
Be directed at the Y-direction of primary mirror 4, laser displacement gauge I5, laser displacement gauge II11 test respectively primary mirror 4 in the horizontal plane X to the position with Y-direction
It moves.Two direction inertia jitter-sensitive device 10 is bolted on camera primary mirror 4, and laser position sensor 2 is bolted
On focal plane receiver 3, secondary mirror 8, three mirrors 9 are separately mounted to the fixed position of 1 internal reflector of camera main-body.
When test, laser displacement gauge I5 and laser displacement gauge II11 measure in 4 horizontal plane of primary mirror X to the position with Y-direction respectively
It moves, two direction inertia jitter-sensitive device 10 measures primary mirror 4 under the influence of micro-vibration disturbs source, the micro breadth oscillation of generation, and emits height
Focus laser, the laser successively by secondary mirror 8, three mirrors 9 reflection after, focus on focal plane receiver 3, simulate actual imaging
Light path.Laser position sensor 2 receives the laser signal with vibration information, that is, measure obtain laser in face X to and Y-direction
The situation of change of both direction.2 measurement data of laser position sensor is primary mirror 4, secondary mirror 8 and three mirrors 9 caused by micro-vibration
The synthesis result of attitudes vibration.Data collection and transmission 7 passes through to two laser displacement gauges and laser position sensor 2
Test data is acquired analysis, and camera is obtained in conjunction with coordinate system transformation relationship between laser position sensor 2 and camera primary mirror 4
For focal plane receiver 3 as moving caused by micro-vibration, the design to repair algorithm for remote sensing images provides important evidence.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in the present invention's
Within protection domain.
Claims (4)
1. a kind of full light path image motion measurement system of Optical remote satellite camera, which is characterized in that the image motion measurement system is by swashing
Light displacement meter, two direction inertia jitter-sensitive device, speculum, laser position sensor, data collection and transmission composition；
Two direction inertia jitter-sensitive device is fixed on camera primary mirror, and laser position sensor is fixed at the receiver of focal plane, double
The vibration attitudes vibration of camera primary mirror is converted into measurable laser signal, the laser signal warp to inertial shake sensor
The reflection for crossing speculum is received by laser position sensor, and the transmission path analogue camera of the laser signal is imaged full light path；
Two laser displacement gauges are in same level with camera primary mirror, and camera primary mirror is measured in institute using two laser displacement gauges
The change in displacement along two different directions in horizontal plane is stated, the displacement and laser position sensor that two laser displacement gauges measure connect
The laser signal of receipts is transferred to data collection and transmission, is analyzed by data collection and transmission and calculates acquisition camera
Full light path picture moves vector.
2. the full light path image motion measurement system of Optical remote satellite camera as described in claim 1, which is characterized in that the laser
Position sensor is bolted to connection with focal plane receiver.
3. the full light path image motion measurement system of Optical remote satellite camera as described in claim 1, which is characterized in that two laser
The laser beam of displacement meter is overlapped with two coordinate system axis in camera primary mirror plane respectively.
4. the full light path image motion measurement system of Optical remote satellite camera as described in claim 1, which is characterized in that described two-way
Inertial shake sensor is bolted to connection with camera primary mirror.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110736597A (en) * | 2019-10-25 | 2020-01-31 | 长光卫星技术有限公司 | Disturbance vibration test system based on acceleration sensor and test method thereof |
| CN110987377A (en) * | 2019-12-18 | 2020-04-10 | 中国空间技术研究院 | Optical axis angle measuring method of space optical camera |
| CN111323191A (en) * | 2020-04-16 | 2020-06-23 | 北京空间飞行器总体设计部 | Device for testing influence of micro-vibration of spacecraft on imaging quality of optical camera |
| CN111323111A (en) * | 2020-03-11 | 2020-06-23 | 北京空间飞行器总体设计部 | Modal test system suitable for film antenna under vacuum environment |
| CN112284352A (en) * | 2020-09-14 | 2021-01-29 | 北京空间飞行器总体设计部 | Image stabilizing system and method for optical remote sensing satellite |
| CN113014819A (en) * | 2021-03-11 | 2021-06-22 | 维沃移动通信有限公司 | Camera module, electronic equipment and shake compensation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110736597A (en) * | 2019-10-25 | 2020-01-31 | 长光卫星技术有限公司 | Disturbance vibration test system based on acceleration sensor and test method thereof |
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| CN110987377B (en) * | 2019-12-18 | 2021-12-21 | 中国空间技术研究院 | Optical axis angle measuring method of space optical camera |
| CN111323111A (en) * | 2020-03-11 | 2020-06-23 | 北京空间飞行器总体设计部 | Modal test system suitable for film antenna under vacuum environment |
| CN111323191A (en) * | 2020-04-16 | 2020-06-23 | 北京空间飞行器总体设计部 | Device for testing influence of micro-vibration of spacecraft on imaging quality of optical camera |
| CN112284352A (en) * | 2020-09-14 | 2021-01-29 | 北京空间飞行器总体设计部 | Image stabilizing system and method for optical remote sensing satellite |
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| CN113014819A (en) * | 2021-03-11 | 2021-06-22 | 维沃移动通信有限公司 | Camera module, electronic equipment and shake compensation method |
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Application publication date: 20181002 |