CN104360417A - Stabilization accuracy test device for photoelectric detection system stabilized platform - Google Patents
Stabilization accuracy test device for photoelectric detection system stabilized platform Download PDFInfo
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- CN104360417A CN104360417A CN201410686266.6A CN201410686266A CN104360417A CN 104360417 A CN104360417 A CN 104360417A CN 201410686266 A CN201410686266 A CN 201410686266A CN 104360417 A CN104360417 A CN 104360417A
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- testing apparatus
- ccd detector
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- photodetection system
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Abstract
The invention discloses a stabilization accuracy test device for a photoelectric detection system stabilized platform. The stabilization accuracy test device for the photoelectric detection system stabilized platform comprises a collimator. An optical system of the collimator comprises a light source which is used for lighting a cross wire on a cross wire reticule arranged right opposite to the light source. An image of the lighted cross wire is sequentially reflected by a beam splitter prism b and a beam splitter prism a and passes a telescope objective to a reflector, the image reflected back through the reflector is reflected through the beam splitter prism a, transmits a transferring objective a and reaches a large field CCD detector. Meanwhile, the image reflected back through the reflector transmits the beam splitter prism a, transmits the beam splitter prism b and a transferring objective b, and then reaches a small field CCD detector. According to the stabilization accuracy test device, the double-view-field collimator is adopted, a large view field is aligned with a reflected object and then switched to a small view field, the object offset is judged and read, and therefore a stabilization accuracy test is finished. The large view field and the small view field of the test device can be automatically switched, parallel light beams can be emitted to achieve auto-collimation, test accuracy is high, operation is easy and convenient, and functions are complete.
Description
Technical field
The invention belongs to emulation testing technology, be specifically related to the general purpose test equipment of a kind of lasting accuracy for Photodetection system stable platform test.
Background technology
The parallel light tube of existing Photodetection system lasting accuracy test is monoscopic, and light pipe holder can not adjust, and finds reflectance target very difficult.Even if some adds laser viewfinder, but the dismounting of viewfinder is difficult, and all can affect searching reflectance target to the weak vibrations of parallel light tube during dismounting.Therefore this kind equipment is in the past not easy to use.
Summary of the invention
The object of this invention is to provide a kind of lasting accuracy testing apparatus of Photodetection system stable platform, to solve the problem that existing test macro is not easy to use.
In order to realize above object, the technical solution adopted in the present invention is: a kind of lasting accuracy testing apparatus of Photodetection system stable platform, comprise parallel light tube, the optical system of described parallel light tube comprises light source, this light source is for will just throw light on to the crosshair on its crosshair graticule arranged, illuminated crosshair is successively after Amici prism b and Amici prism a reflects, reflective mirror is arrived again via telephotolens, the picture be reflected back by catoptron reflects through Amici prism a and through after image rotation object lens a, arrives Large visual angle ccd detector; The picture be simultaneously reflected back by catoptron after Amici prism a transmission, then after Amici prism b and image rotation object lens b transmission, arrives small field of view ccd detector.
Illuminating spotlight object lens are also provided with between described light source and crosshair graticule.
Described telephotolens focal length is 500mm, and clear aperture is Φ 100mm.
The multiplying power of described image rotation object lens a is 1/3, and the multiplying power of image rotation object lens b is 2.
This testing apparatus also comprises for measurement data and the controller to view synthesis, and described Large visual angle ccd detector and small field of view ccd detector are all connected with this controller communication.
Described parallel light tube is placed on three-dimensional precise adjustment platform.
Described three-dimensional precise adjustment platform is supported by lifting cart.
The lasting accuracy testing apparatus of Photodetection system stable platform of the present invention adopts double-view field parallel light tube to provide the detection reference of test product, Large visual angle is utilized to aim at reflectance target, be switched to small field of view again, by the side-play amount of software interpretation target, complete lasting accuracy test with this.The large small field of view of testing apparatus can automatically switch, and test result can automatic interpretation, can emitting parallel light Shu Shixian autocollimation, and measuring accuracy is high, easy and simple to handle, complete function.
Accompanying drawing explanation
Fig. 1 is the optical system diagram of parallel light tube;
Fig. 2 is Large visual angle view finding functional mode schematic diagram;
Fig. 3 is small field of view measurement pattern main operation interface schematic diagram;
Fig. 4 is dynamical surveying mode figure;
Fig. 5 is that crosshair rocks curve record figure.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described further.
The invention provides a kind of lasting accuracy testing apparatus of Photodetection system stable platform, comprise parallel light tube, as shown in Figure 1, the optical system of this parallel light tube comprises LED light source 1, open LED light source 1, this LED light source 1 will just throw light on to the crosshair on its crosshair graticule 3 arranged, illuminated crosshair is successively after Amici prism b (label 4) and Amici prism a (label 5) reflection, reflective mirror 7 is arrived again via telephotolens 6, the picture be reflected back by catoptron 7 is through Amici prism a reflection and through after image rotation object lens a (label 8), arrive Large visual angle ccd detector 9, the picture be simultaneously reflected back by catoptron is after Amici prism a (label 5) transmission, again after Amici prism b (label 4) and image rotation object lens b (label 10) transmission, arrive small field of view ccd detector 11, the electric crosshair produced with controller software is compared, and realizes low-angle and accurately measures.
For increasing illuminating effect further, between light source and crosshair graticule, be also provided with illuminating spotlight object lens 2.
The present embodiment optical system major parameter is as follows: telephotolens focal length is 500mm, and clear aperture is Φ 100mm; The multiplying power of image rotation object lens a is 1/3, and the multiplying power of image rotation object lens b is 2.
Selecting of ccd detector: the Main Basis choosing Large visual angle ccd detector device is the requirement meeting field range 2 ω >=± 2 °.The combined focal length of telephotolens and image rotation object lens a is 180mm, and CCD chip is of a size of δ, then from tan ω=δ/f ', and the CCD chip dimension delta >=6.4mm selected, the A622f type CCD black and white digital camera therefore selecting Basler company to research and develop.Its CCD chip is of a size of 2/3 inch, and unit pixel size is 6.7 μm × 6.7 μm; When 8 output modes, its highest sample frequency is 25fps.This camera can meet the requirement of Large visual angle view finding.
The VA-2M67 type CCD black and white digital camera that small field of view ccd detector selects Vieworks company of Korea S to research and develop, this camera resolution is 1600 (H) × 1200 (V), and unit pixel size is 5.5 μm × 5.5 μm, and frame frequency is 70.7fps.
According to the parallel light tube designed by above-mentioned optical system, telephotolens, image rotation object lens and large and small visual field CCD be made adjustable, to ensure that CCD target surface overlaps with the image planes of telephotolens.This parallel light tube overall length is 800mm, and beam overall is 150mm, and be highly 350mm, maximum caliber 130mm, general assembly (TW) is about 13kg.Light pipe surface spraying silver gray is hung down line paint.
Because required light pipe geometric center height adjustment scope is comparatively large, this parallel light tube adopts the form of liftable go-cart and accurate adjustment platform combination adjustment.Required setting range can be met for ensureing that parallel light tube center is high, parallel light tube can be placed in the three-dimensional precise supported by lifting cart and adjust on platform.Lifting cart is used for light pipe geometric center high adjustment and the carrying of equipment on a large scale, the adjustment in the high and light pipe pitching orientation of the geometric center that accurate adjustment platform is used for adjusting among a small circle light pipe.Can the stable liftable go-cart of outsourcing, configuration accurate adjustment platform, to ensure that the geometric center of infrared collimator is high and orientation is adjustable.
Liftable go-cart is used for the carrying of light pipe geometric center high adjustment and overall device on a large scale.Because required light pipe geometric center high adjustable extent is large, therefore lifting cart should have larger height adjustment range.This go-cart model is TF35, bed dimension is 905mm × 512mm × 55mm, deadweight is 103kg, nominal load capacity is 350kg, minimum working depth is 345mm, and maximum working height is 1300mm, adopts foot-operated hydraulic pump drive, and after liftable go-cart arrival, location leg will be installed additional to meet stability requirement to it.
Accurate adjustment platform is used for the adjustment in light pipe geometric center high adjustment and level and pitching orientation among a small circle.This precision adjustment platform is made up of upper and lower two parts, and upper part is BT401 pitching universal stage, for the pitching orientation of light pipe and the adjustment of level orientation; Lower part is the accurate lifting table of BS120-1, for the accurate among a small circle adjustment that light pipe geometric center is high.The luffing angle of BT401 pitching universal stage is ± 10 °, and the anglec of rotation is ± 10 °, and precision is 5 μm, and resolution is 1 μm, conducts oneself with dignity for 4.5kg, and nominal load capacity is 50kg.The impulse stroke of the accurate lifting table of BS120-1 is 120mm, and resolution is 0.05mm, and bed dimension is 240mm × 165mm, conducts oneself with dignity for 7.8kg, and nominal load capacity is 100kg.The adjustment of this precision can meet light pipe adjustment requirement completely.
This testing apparatus also comprises for measurement data and the controller to view synthesis, Large visual angle ccd detector and small field of view ccd detector are all connected with this controller communication, and this controller is primarily of computing machine (containing display) and image and data processing software composition.Wherein, Lenovo Yangtian A8000R computing machine selected by computing machine, and its basic configuration is as follows: CPU:Intel Duo i3530; Internal memory: 2GB; Hard disk: 500GB; Video card: independent, AMD Radeon HD5570; Video memory: 1GB; Interface and expansion slot: 1 RS232 output interface, 3 pci expansion slots; Display: 21.5 cun, resolution: 1920 × 1080; H) CD-ROM drive: DVD burner.Image and data processing software major function: crosshair is shown as dark field bright line; Show crosshair image and measurement data simultaneously; Large small field of view switching can be carried out; Can tolerance range arrange; Exportable measurement result file, containing correlation graph.
The main operation interface of software and specifically arrange as follows: in Large visual angle pattern, graticule center is carved to measure and is used little crosshair, four horn craving look for picture right angle to identify, as long as there is any one in the mark of corner in Large visual angle, autocollimator can be adjusted rapidly under the guiding of this mark, make it aim at measured target, realize quick view finding function, as shown in Figure 2.
After Large visual angle view finding process completes, namely changeablely enter in small field of view measurement pattern, as shown in Figure 3.Static measurement: in static measurement process, even if multiple autocollimation picture can be detected in visual field, to measure the offset of one of them autocollimatic crosshair picture, available mouse clicks this crosshair, the offset of specifying crosshair (selecting with choice box) relative to standard electric center of reticule can be provided, as shown in Figure 4 in measurement data hurdle on the right of in main interface.
Kinetic measurement: angle rolling moving curve (image-sampling frequency is 50 frames/second) that vibration period internal object crosshair can be drawn.Concrete operations are: after the vibration period is provided with, and mouse clicks in master menu submenu of " sampling and calculate " in " operation " hurdle can complete this operation, as shown in Figure 5.To watch the data that in slosh cycle, each moment point target angle is inclined, " preservation " option can be clicked the curve data that rocks of target crosshair is stored in and specifies in Excel form, thus provide maximum error, least error and the mean square deviation that this vibration period internal object rocks further.
Testing apparatus of the present invention is also configured with for providing the standard angle of wedge, the standard reflection mirror as the aiming boss of parallel light tube and the central controlled power control box for power supply.Specification and the parameter of standard reflection mirror are as follows: minute surface clear aperature: Φ 80mm, foveal reflex face diameter: Φ 50mm; Wedge-shaped mirrors angle value: 10 ' ± 10 " (referring to the angle of inside and outside reflection picture); Angle of wedge stated accuracy: 1 "; Wedge-shaped mirrors face shape error: < 1/10 aperture; Fully reflecting surface is to plane perpendicular degree: < 1 '; N) fully reflecting surface fully reflecting surface is to side verticality: < 1 ' (doing the adjustable mirror used time); Physical dimension: 126mm × 105mm × 182mm.
Power control box is used for the centrally connected power supply to large and small visual field CCD, computing machine and other consumers, so that the operation of system, its overall objective is as follows: clear aperture: Φ 100mm; Maximum functional distance: >=10m; Small field of view: >=± 11 ' (level) × ± 11 ' (vertically); Large visual angle: >=± 2 ° of (level) × ± 2 ° (vertically); Visual field switches: in-placing precision 30 ", repeatable accuracy 15 "; Measurement range: >=± 3 ' (level) × ± 3 ' (vertically); The error of indication: in measurement range≤0.5 "; Stability of display :≤0.5 "; Equipment is powered: AC220V, 50Hz.
Above embodiment only understands core concept of the present invention for helping; the present invention can not be limited with this; for those skilled in the art; every according to thought of the present invention; the present invention is modified or equivalent replacement; any change done in specific embodiments and applications, all should be included within protection scope of the present invention.
Claims (7)
1. the lasting accuracy testing apparatus of a Photodetection system stable platform, it is characterized in that: comprise parallel light tube, the optical system of described parallel light tube comprises light source, this light source is for will just throw light on to the crosshair on its crosshair graticule arranged, illuminated crosshair is successively after Amici prism b and Amici prism a reflects, arrive reflective mirror via telephotolens again, the picture be reflected back by catoptron reflects through Amici prism a and through after image rotation object lens a, arrives Large visual angle ccd detector; The picture be simultaneously reflected back by catoptron after Amici prism a transmission, then after Amici prism b and image rotation object lens b transmission, arrives small field of view ccd detector.
2. the lasting accuracy testing apparatus of Photodetection system stable platform according to claim 1, is characterized in that: be also provided with illuminating spotlight object lens between described light source and crosshair graticule.
3. the lasting accuracy testing apparatus of Photodetection system stable platform according to claim 1, is characterized in that: described telephotolens focal length is 500mm, and clear aperture is Φ 100mm.
4. the lasting accuracy testing apparatus of Photodetection system stable platform according to claim 1, is characterized in that: the multiplying power of described image rotation object lens a is 1/3, and the multiplying power of image rotation object lens b is 2.
5. the lasting accuracy testing apparatus of the Photodetection system stable platform according to Claims 1 to 4 any one, it is characterized in that: this testing apparatus also comprises for measurement data and the controller to view synthesis, and described Large visual angle ccd detector and small field of view ccd detector are all connected with this controller communication.
6. the lasting accuracy testing apparatus of Photodetection system stable platform according to claim 1, is characterized in that: described parallel light tube is placed on three-dimensional precise adjustment platform.
7. the lasting accuracy testing apparatus of Photodetection system stable platform according to claim 6, is characterized in that: described three-dimensional precise adjustment platform is supported by lifting cart.
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| CN114966889A (en) * | 2022-05-24 | 2022-08-30 | 中国科学院西安光学精密机械研究所 | Stability precision detection device for airborne stable platform and test method thereof |
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| CN114966889B (en) * | 2022-05-24 | 2024-04-12 | 中国科学院西安光学精密机械研究所 | Device and method for detecting stability and precision of airborne stabilized platform |
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