CN103090161A - Gas magnetic vibration isolation platform based on spring zero position benchmark and laser auto-collimation measurement - Google Patents
Gas magnetic vibration isolation platform based on spring zero position benchmark and laser auto-collimation measurement Download PDFInfo
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- CN103090161A CN103090161A CN2012105719657A CN201210571965A CN103090161A CN 103090161 A CN103090161 A CN 103090161A CN 2012105719657 A CN2012105719657 A CN 2012105719657A CN 201210571965 A CN201210571965 A CN 201210571965A CN 103090161 A CN103090161 A CN 103090161A
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Abstract
The invention discloses a gas magnetic vibration isolation platform based on a spring zero position benchmark and laser auto-collimation measurement and belongs to ultra-precision measurement and ultra-precision machining equipment. The gas magnetic vibration isolation platform based on the spring zero position benchmark and the laser auto-collimation measurement adopts three or more vibration isolators with static pressure gas magnetic structures to support gas magnetic vibration isolation platform bodies and the load of the vibration isolators. Platform six degrees of freedom posture monitoring is realized through a beam splitter prism and a photoelectric detector. A vertical and horizontal displacement actuator is arranged between the vibration isolators and the platform body to achieve the adjustment of the six degrees of freedom of the platform body. A zero position benchmark device supported by a spring damper can effectively isolate the influence of ground vibration on a reference light beam testing. Stability of the laser beam zero position benchmark is improved. Flat drift and angle drift of a reference light beam are tested by the photoelectric detector, and a pair of wedge prisms with adjustable relative position intervals and angles is used for adjusting the flat drift and the angle drift of the reference light beam to achieve reference beam calibration. Therefore, platform vibration isolation performance is significantly improved.
Description
Technical field
The invention belongs to ultra precise measurement and ultraprecise process unit, relate generally to a kind of gas magnetic vibration-isolating platform based on pneumatic spring zero reference and laser auto-collimation measurement.
Background technique
In ultraprecise metrology and measurement and ultraprecise manufacture field, the platform with high quality level attitude is the basic guarantee that carries out precision measuremnt and large-scale integrated circuit (LSI) manufacturing.The application of high quality level attitude gas magnetic vibration-isolating platform is very extensive.In the factory that bioscience, electron optics, precision optical machinery processing, physics and chemistry test and research thereof are correlated with, the horizontal attitude control of platform can have influence on the experiments of measuring result of machinery equipment and the usability of instrument apparatus, and can directly affect gas magnetic vibration-isolating platform to the rejection of vibration.Along with the raising of the grade of accuracy of ultra precise measurement instrument and ultraprecise manufacturing equipment, ambient vibration is increasing on the impact of instrument and equipment.Gas magnetic vibration-isolating platform as emerging device for vibration insutation also along with the manufacturing development of precision type instrument.The horizontal attitude of gas magnetic vibration-isolating platform directly have influence on above it the precision of the instrument of putting and equipment, so being stabilized in of gas magnetic vibration-isolating platform attitude seems especially important in precision type instrument manufacturing and scientific research.Particularly for China R﹠D institution and enterprise, along with the manufacturing high speed development of vlsi circuit and to the improving constantly of measuring accuracy and Measurement sensibility requirement, also be subject to acid test more as the stability of the vibration-isolating platform on basis.
Along with the raising that ultraprecise instrument and system require working environment, traditional passive vibration isolation mode is restricted by the factors such as vibration isolator material behavior, structural rigidity, can't satisfy the vibration isolation requirement to low frequency signal.For this problem, the researcher combines active Vibration Isolation with the passive vibration isolation device, reaches the purpose (Vibration Isolation Apparatus For Stage. U.S. Patent Publication No. US006327024B1) that promotes the low frequency vibration isolation performance.The method is arranged on one or more vibration dampers between worktable and pedestal, and damping device has an electric actuator, and final controlling element responds the signal of a position transducer, plays the active vibration isolation effect, has promoted its low frequency vibration isolation performance.The problem that the method exists is: 1) worktable does not possess attitude adjustment function; 2) the position sensor feedback signal is relative quantity, there is no the absolute zero position benchmark, can't accurately locate operating position.
In order to realize vibration isolation table stage body attitude adjustment function, the China Measures Institute has proposed the pneumatic attitude of a kind of vibration-isolating platform and has adjusted scheme (vibrating isolation foundation precise leveling system.Patent publication No.: CN 101353897A).This scheme adopts the two grad vibration isolation platform, and the precision optics vibration-isolating platform is positioned on vibrating isolation foundation, by measuring the angle of vibration-isolating platform and horizontal plane, pneumatic spring is carried out inflation/deflation control, and reaches the purpose of adjusting the vibration-isolating platform attitude.The problem that this scheme exists is: 1) in the public technology scheme, vibration-isolating platform can't be realized accurate location; 2) by the pneumatic spring inflation/deflation is adjusted the vibration-isolating platform attitude, system response time is slow.
China Watercraft The Ninth Design ﹠ Research Institute Engineering Co., Ltd. proposes a kind of every (the microvibration-preventing basis of many precision type instrument centralized arrangement, little basis that shakes.Patent publication No.: CN 200920078087.9).This scheme has designed the two-layer independently vibration isolation table in up and down, and T-shaped cross section vibration isolation base is adopted on the upper strata, and vibration isolation base is supported on lower floor's concrete beam by vibration isolation element, and this structure can reduce the vibrating isolation system barycenter, has improved vibration isolation efficiency.The problem of this scheme is, only adopts the passive vibration isolation mode, can't isolate low-frequency vibration signal.
Chongqing Normal University proposes a kind of precise vibration isolation device (a kind of precise vibration isolation device.Publication number: CN200920207338.9).This scheme adopts two-layer vibration insulation structure, first layer passive vibration isolation device consists of by pneumatic spring is in parallel with magnetic rheological body, second layer vibration isolator consists of by pneumatic spring is in parallel with micro actuator, and double-layer structure tandem arrangement, this scheme have improved the anti-vibration performance of isolation mounting to low frequency signal.The problem of this scheme is, vibration-isolating platform does not possess attitude and adjusts function.
The common problem that existing patent of invention exists:
1. the measurement of vibration-isolating platform is relative position, there is no the absolute zero position benchmark, therefore can't accurately locate vibration-isolating platform position;
2. not to the attitude highi degree of accuracy control program of vibration-isolating platform, so vibration-isolating platform can't obtain high-level anti-vibration performance.
The detection scheme of gas magnetic vibration-isolating platform stage body horizontal attitude has multiple, and pinpoint method is mainly to come the detection level attitude by setting up rectangular coordinate system, measures stage body separately by the degree change in displacement.The displacement measurement of gas magnetic vibration-isolating platform stage body need adopt the optical non-contact method of measurement, otherwise sensor will be given vibrating isolation system additional stiffness and damping, destroys gas magnetic vibration-isolating platform natural frequency, reduces anti-vibration performance.The method kind that the tradition non-contact optical is measured displacement have based on ccd image detect, based on the frequency discrimination of laser and amplitude discrimination measurement etc.Because the platform stage body is change in displacement on six-freedom degree, mutually to interfere between each degrees of freedom, the image-based method of measurement can't realize; And the impact of drifting about based on the method Stimulated Light self of laser detection is difficult to realize high-precision measurement.But, to improving constantly that gas magnetic vibration-isolating platform anti-vibration performance requires, the control accuracy of stage body attitude displacement is required to reach micron dimension, and platform is all in large or super large stage body situation.So have that the displacement control accuracy is high, anti-vibration performance is excellent, reach the above large-scale or super sized type gas magnetic vibration-isolating platform of VC-F rank be ultra precise measurement both at home and abroad at present and the active demand of manufacturing equipment every/dampening apparatus.
Summary of the invention
Purpose of the present invention is exactly the problem that exists for above-mentioned prior art, in conjunction with actual demand, design provides a kind of gas magnetic vibration-isolating platform based on pneumatic spring zero reference and laser auto-collimation measurement, reaches the stability that improves the laser beam zero reference, the purpose that realizes Reference beam calibration, raising platform anti-vibration performance.
Technical solution of the present invention is:
gas magnetic vibration-isolating platform based on pneumatic spring zero reference and laser auto-collimation measurement, described gas magnetic vibration-isolating platform stage body is configured in more than 3 or 3 on equally distributed vibration isolator, vibration isolator is configured on pedestal, described vibration isolator is by the vibration isolator pedestal, vibration isolator support and vibration isolator worktable consist of, the vibration isolator worktable is arranged in the vibration isolator pedestal, the vibration isolator support is configured on vibration isolator pedestal lateral part, configuration vertical deviation final controlling element between each vibration isolator and gas magnetic vibration-isolating platform stage body, described vertical deviation final controlling element adopts the rotary-type voice coil motor of vertical placement, the rotary-type voice coil motor mover of vertical deviation final controlling element and gas magnetic vibration-isolating platform stage body are connected, the rotary-type voice coil motor stator arrangement of vertical deviation final controlling element is on the vibration isolator bearing, measure the laser position optical path of gas magnetic vibration-isolating platform stage body six-degree-of-freedom posture by the He-Ne laser, laser collimation system, the zero reference device, stage body attitude photoelectric detector, stage body attitude dispersion prism consists of, stage body attitude photoelectric detector wherein, stage body attitude dispersion prism is packed on gas magnetic vibration-isolating platform stage body lower side, described stage body attitude dispersion prism comprises the first dispersion prism, the second dispersion prism, the 3rd dispersion prism and the 4th dispersion prism, and the first dispersion prism is positioned on the rear side transmission laser light path of laser collimation system, the second dispersion prism and the 3rd dispersion prism lay respectively in the transmission and reflected light path of the first dispersion prism, the 4th dispersion prism is positioned on the reflected light path of the 3rd dispersion prism, described stage body attitude photoelectric detector comprises the first photoelectric detector, the second photoelectric detector, the 3rd photoelectric detector and the 4th photoelectric detector, wherein the first photoelectric detector and the second photoelectric detector lay respectively in the transmission and reflected light path of the second dispersion prism, and the 3rd photoelectric detector and the 4th photoelectric detector lay respectively in the transmission and reflected light path of the 4th dispersion prism, described laser collimation system by laser bundle-enlarging collimation system, convex lens, flat float with the angle float detect photoelectric detector, light beam regulating mechanism, flat float to float with the angle detect dispersion prism and consist of, wherein the light beam regulating mechanism floats and the angle is floated and detected between dispersion prism in laser bundle-enlarging collimation system peace, convex lens float and the angle is floated and detected that dispersion prism peace is floated and the angle is floated and detected between photoelectric detector flat, and the light beam regulating mechanism comprises angle of wedge prism, the angle of wedge prism of capable of regulating relative position spacing and angle, described zero reference device comprises that zero reference photoelectric detector mountion plate and natural frequency are lower than the passive damper of 0.5Hz, zero reference photoelectric detector mountion plate is arranged on pedestal by passive damper, and is positioned on the downside refractive light paths of laser collimation system, by flat float that photoelectric detector and angle float that photoelectric detector consists of flat float to float with the angle detect photoelectric detector and be packed on zero reference device zero reference photoelectric detector mountion plate, its initial position, each is flat floats, the angle is floated the photoelectric detector receiving plane moving direction is vertical respectively with separately, and the receiving plane center overlaps with corresponding beam center.
Described stage body attitude photoelectric detector peace is floated to float with the angle and is detected photoelectric detector and comprise position sensitive detector PSD, CCD, four-quadrant detector QPD and silicon photocell.
Described passive damper adopts the pneumatic spring structure, and passive damper is the zero stiffness vibration damper.
Described vertical deviation final controlling element adopts the rotary-type voice coil motor of vertical placement, the rotary-type voice coil motor mover of vertical deviation final controlling element and gas magnetic vibration-isolating platform stage body are connected, and the rotary-type voice coil motor stator arrangement of vertical deviation final controlling element is on the vibration isolator bearing.
The good result of technological innovation of the present invention and generation is:
1) this device zero reference device adopts passive damper to support, the passive damper natural frequency is lower than 0.5Hz, can effectively isolate the vibration on ground to the impact that Reference beam detects, greatly improve the stability of laser beam zero reference, this is one of innovative point of the present invention and outstanding advantages.
2) the present invention's flat floating with the angle of adopting two photoelectric detectors to detect respectively Reference beam floated, and floats with flat the floating with the angle that the angle of wedge prism of a pair of capable of regulating relative position spacing and angle is subdued Reference beam in real time, realizes the Reference beam calibration; Adopt the monitoring of photoelectric detector and dispersion prism implementation platform six-degree-of-freedom posture, and realized controlling every/vibration reduction platform movement in vertical direction highi degree of accuracy by the vertical deviation final controlling element, improved the platform anti-vibration performance, this is two of innovative point of the present invention and outstanding advantages.
Description of drawings:
Fig. 1 is based on the gas magnetic vibration-isolating platform three-dimensional structure schematic diagram of pneumatic spring zero reference and laser auto-collimation measurement;
Fig. 2 is based on the structural representation of the gas magnetic vibration-isolating platform of pneumatic spring zero reference and laser auto-collimation measurement;
Fig. 3 is the plan view of Fig. 2;
Fig. 4 is the laser collimation system structural representation;
Fig. 5 is zero reference apparatus structure schematic diagram;
Fig. 6 is light beam regulating mechanism two schemes structural representation;
Fig. 7 is that flat the floating with the angle of laser beam floated the detection principle schematic;
Fig. 8 is vibration isolator and vertical displacement final controlling element assembly structure schematic diagram.
Piece number in figure: 1-He-Ne laser; The 2-laser collimation system; 3-zero reference device; 3a-zero reference photoelectric detector mountion plate; The 3b-passive damper; The 4-vibration isolator; 4a-vibration isolator pedestal; 4b-vibration isolator support; 4c-vibration isolator worktable; The 5-pedestal; 6-gas magnetic vibration-isolating platform stage body; 7-stage body attitude photoelectric detector; 7a-the first photoelectric detector; 7b-the second photoelectric detector; 7c-the 3rd photoelectric detector; 7d-the 4th photoelectric detector; 8-vertical deviation final controlling element; The rotary-type voice coil motor mover of 8a-; The rotary-type voice coil motor stator of 8b-; Flat the floating with the angle of 9-floated the detection dispersion prism; 10-stage body attitude dispersion prism; 10a-the first dispersion prism; 10b-the second dispersion prism; 10c-the 3rd dispersion prism; 10d-the 4th dispersion prism; The 11-laser bundle-enlarging collimation system; The 12-convex lens; Flat the floating with the angle of 13-floated the detection photoelectric detector; The flat photoelectric detector that floats of 13a-; 13b-floats photoelectric detector in the angle; 14-light beam regulating mechanism; 14a-angle of wedge prism A; 14b-angle of wedge prism B.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present invention is described in further detail:
gas magnetic vibration-isolating platform based on pneumatic spring zero reference and laser auto-collimation measurement, described gas magnetic vibration-isolating platform stage body 6 is configured in more than 3 or 3 on equally distributed vibration isolator 4, vibration isolator 4 is configured on pedestal 5, described vibration isolator 4 is by vibration isolator pedestal 4a, vibration isolator support 4b and vibration isolator worktable 4c consist of, vibration isolator worktable 4c is arranged in vibration isolator pedestal 4a, vibration isolator support 4b is configured on vibration isolator pedestal 4a lateral part, configuration vertical deviation final controlling element 8 between each vibration isolator 4 and gas magnetic vibration-isolating platform stage body 6, described vertical deviation final controlling element 8 adopts the rotary-type voice coil motor of vertical placement, the rotary-type voice coil motor mover 8a of vertical deviation final controlling element 8 and gas magnetic vibration-isolating platform stage body 6 are connected, the rotary-type voice coil motor stator 8b of vertical deviation final controlling element 8 is configured on vibration isolator bearing 4b, measure the laser position optical path of gas magnetic vibration-isolating platform stage body 6 six-degree-of-freedom postures by He-Ne laser 1, laser collimation system 2, zero reference device 3, stage body attitude photoelectric detector 7, stage body attitude dispersion prism 10 consists of, stage body attitude photoelectric detector 7 wherein, stage body attitude dispersion prism 10 is packed on gas magnetic vibration-isolating platform stage body 6 lower sides, described stage body attitude dispersion prism 10 comprises the first dispersion prism 10a, the second dispersion prism 10b, the 3rd dispersion prism 10c and the 4th dispersion prism 10d, and the first dispersion prism 10a is positioned on the rear side transmission laser light path of laser collimation system 2, the second dispersion prism 10b and the 3rd dispersion prism 10c lay respectively in the transmission and reflected light path of the first dispersion prism 10a, the 4th dispersion prism 10d is positioned on the reflected light path of the 3rd dispersion prism 10c, described stage body attitude photoelectric detector 7 comprises the first photoelectric detector 7a, the second photoelectric detector 7b, the 3rd photoelectric detector 7c and the 4th photoelectric detector 7d, wherein the first photoelectric detector 7a and the second photoelectric detector 7b lay respectively in the transmission and reflected light path of the second dispersion prism 10b, and the 3rd photoelectric detector 7c and the 4th photoelectric detector 7d lay respectively in the transmission and reflected light path of the 4th dispersion prism 10d, described laser collimation system 2 by laser bundle-enlarging collimation system 11, convex lens 12, flat float with the angle float detect photoelectric detector 13, light beam regulating mechanism 14, flat float to float with the angle detect dispersion prism 9 and consist of, wherein light beam regulating mechanism 14 floats and the angle is floated and detected between dispersion prism 9 in laser bundle-enlarging collimation system 11 peace, convex lens 12 float and the angle is floated and detected that dispersion prism 9 peace are floated and the angle is floated and detected between photoelectric detector 13 flat, and light beam regulating mechanism 14 comprises angle of wedge prism A14a, the angle of wedge prism B14b of capable of regulating relative position spacing and angle, described zero reference device 3 comprises that zero reference photoelectric detector mountion plate 3a and natural frequency are lower than the passive damper 3b of 0.5Hz, zero reference photoelectric detector mountion plate 3a is arranged on pedestal 5 by passive damper 3b, and is positioned on the downside refractive light paths of laser collimation system 2, by flat float that photoelectric detector 13a and angle float that photoelectric detector 13b consists of flat float to float with the angle detect photoelectric detector 13 and be packed on the zero reference photoelectric detector mountion plate 3a of zero reference device 3, its initial position, each is flat floats, photoelectric detector 13a is floated at the angle, moving direction is vertical respectively with separately for the 13b receiving plane, and the receiving plane center overlaps with corresponding beam center.
Described stage body attitude photoelectric detector 7 peace are floated to float with the angle and are detected photoelectric detector 13 and comprise position sensitive detector PSD, CCD, four-quadrant detector QPD and silicon photocell.
Described passive damper 3b adopts the pneumatic spring structure, and passive damper 3b is the zero stiffness vibration damper.
Described vertical deviation final controlling element 8 adopts the rotary-type voice coil motor of vertical placement, the rotary-type voice coil motor mover 8a of vertical deviation final controlling element 8 and gas magnetic vibration-isolating platform stage body 6 are connected, and the rotary-type voice coil motor stator 8b of vertical deviation final controlling element 8 is configured on vibration isolator bearing 4b.
Workflow of the present invention is as follows:
The stage body attitude is measured by the laser position optical path, a branch of source laser that laser 1 sends is at first by laser collimation system 2, by flat float to float with the angle detect dispersion prism 9 and tell two bundle Reference beams, float photoelectric detector 13b and receive by flat photoelectric detector 13a and the angle of floating respectively, detect flat drift value and the angle drift value of Reference beam self, adjust in real time its flat floating with the angle by light beam regulating mechanism 14 at last and float.Flat float with the angle float detect photoelectric detector 13 effectively isolation greater than the vibration of 0.5Hz on the impact that Reference beam detects, realize zero reference device 3 and stage body and the earth isolation, as the position absolute zero position benchmark of gas magnetic vibration-isolating platform stage body 6 six-freedom degrees.Light beam is told four road light beams through stage body attitude dispersion prism 10 again, finally received by stage body attitude photoelectric detector 7, realize thus the position probing of the six-freedom degree of stage body attitude, through realizing that by vertical deviation final controlling element 8 stage body attitude Three Degree Of Freedom adjusts control in real time again after resolving.
Float because laser beam has flat floating with the angle, so reference path has certain deviation, thus need all the time all adjust, to guarantee the accuracy of Reference beam.The level that guarantees Reference beam is the basis that guarantees the platform horizontal attitude.Reference beam flat floats to float by being fixed on flat on zero reference device 3 with the angle and floats to float with the angle and detect photoelectric detector 13 and measure.Flat the floating by photoelectric detector 13a of light beam detected, and angle drift of laser is detected by the photoelectric detector 13b with convex lens 12, and suppresses by light beam regulating mechanism 14.Light beam regulating mechanism 14 is by adjusting angle and the relative position spacing of two angle of wedge prisms, and the angle of inhibition light beam is floated peace and floated.Determine after Reference beam that record is demarcated and flatly float that to float with the angle output value that detects photoelectric detector 13 be initial value, output value is approached to the initial value of demarcating get final product.
During work, Reference beam is by real time calibration, the photoelectric detector real-time sampling, adopt 12 values at every turn and remove a maximum value and a minimum value, and 10 remaining values are averaged make comparisons with initial value separately respectively, just can obtain the attitude of gas magnetic vibration-isolating platform stage body 6 under the ground vibration impact through processing and change.Control system is controlled vertical deviation final controlling element 8 Three Degree Of Freedoms according to this measured value and is adjusted the stage body attitude errors, makes gas magnetic vibration-isolating platform stage body be in metastable state, thereby makes gas magnetic vibration-isolating platform have less vibration transmissibility, realizes every/vibration damping.
Claims (4)
1. the gas magnetic vibration-isolating platform of measuring based on pneumatic spring zero reference and laser auto-collimation, it is characterized in that gas magnetic vibration-isolating platform stage body (6) is configured in more than 3 or 3 on equally distributed vibration isolator (4), vibration isolator (4) is configured on pedestal (5), described vibration isolator (4) is by vibration isolator pedestal (4a), vibration isolator support (4b) and vibration isolator worktable (4c) consist of, vibration isolator worktable (4c) is arranged in vibration isolator pedestal (4a), vibration isolator support (4b) is configured on vibration isolator pedestal (4a) lateral part, configuration vertical deviation final controlling element (8) between each vibration isolator (4) and gas magnetic vibration-isolating platform stage body (6), described vertical deviation final controlling element (8) adopts the rotary-type voice coil motor of vertical placement, the rotary-type voice coil motor mover (8a) of vertical deviation final controlling element (8) is connected with gas magnetic vibration-isolating platform stage body (6), the rotary-type voice coil motor stator (8b) of vertical deviation final controlling element (8) is configured on vibration isolator bearing (4b), measure the laser position optical path of gas magnetic vibration-isolating platform stage body (6) six-degree-of-freedom posture by He-Ne laser (1), laser collimation system (2), zero reference device (3), stage body attitude photoelectric detector (7), stage body attitude dispersion prism (10) consists of, stage body attitude photoelectric detector (7) wherein, stage body attitude dispersion prism (10) is packed on gas magnetic vibration-isolating platform stage body (6) lower side, described stage body attitude dispersion prism (10) comprises the first dispersion prism (10a), the second dispersion prism (10b), the 3rd dispersion prism (10c) and the 4th dispersion prism (10d), and the first dispersion prism (10a) is positioned on the rear side transmission laser light path of laser collimation system (2), the second dispersion prism (10b) and the 3rd dispersion prism (10c) lay respectively in the transmission and reflected light path of the first dispersion prism (10a), the 4th dispersion prism (10d) is positioned on the reflected light path of the 3rd dispersion prism (10c), described stage body attitude photoelectric detector (7) comprises the first photoelectric detector (7a), the second photoelectric detector (7b), the 3rd photoelectric detector (7c) and the 4th photoelectric detector (7d), wherein the first photoelectric detector (7a) and the second photoelectric detector (7b) lay respectively in the transmission and reflected light path of the second dispersion prism (10b), and the 3rd photoelectric detector (7c) and the 4th photoelectric detector (7d) lay respectively in the transmission and reflected light path of the 4th dispersion prism (10d), described laser collimation system (2) is by laser bundle-enlarging collimation system (11), convex lens (12), flat floating with the angle floated detection photoelectric detector (13), light beam regulating mechanism (14), flat floating with the angle floated detection dispersion prism (9) formation, wherein light beam regulating mechanism (14) is positioned at that laser bundle-enlarging collimation system (11) peace is floated and the angle is floated and detected between dispersion prism (9), convex lens (12) are positioned at flat float and the angle is floated and detected that dispersion prism (9) peace is floated and the angle is floated and detected between photoelectric detector (13), light beam regulating mechanism (14) comprises the angle of wedge prism A (14a) of capable of regulating relative position spacing and angle, angle of wedge prism B (14b), described zero reference device (3) comprises that zero reference photoelectric detector mountion plate (3a) and natural frequency are lower than the passive damper (3b) of 0.5Hz, zero reference photoelectric detector mountion plate (3a) is arranged on pedestal (5) by passive damper (3b), and is positioned on the downside refractive light paths of laser collimation system (2), float detection photoelectric detector (13) with the angle and be packed on the zero reference photoelectric detector mountion plate (3a) of zero reference device (3) by flat flat floating of floating that photoelectric detector (13a) and angle float that photoelectric detector (13b) consists of, its initial position, moving direction is vertical respectively with separately for each is flat floats, photoelectric detector is floated at the angle (13a, 13b) receiving plane, and the receiving plane center overlaps with corresponding beam center.
2. the gas magnetic vibration-isolating platform of measuring based on pneumatic spring zero reference and laser auto-collimation according to claim 1 is characterized in that described stage body attitude photoelectric detector (7) peace floats to float with the angle to detect photoelectric detector (13) and comprise position sensitive detector PSD, CCD, four-quadrant detector QPD and silicon photocell.
3. the gas magnetic vibration-isolating platform of measuring based on pneumatic spring zero reference and laser auto-collimation according to claim 1, it is characterized in that described passive damper (3b) adopts the pneumatic spring structure, and passive damper (3b) is the zero stiffness vibration damper.
4. the gas magnetic vibration-isolating platform of measuring based on pneumatic spring zero reference and laser auto-collimation according to claim 1, it is characterized in that described vertical deviation final controlling element (8) adopts the rotary-type voice coil motor of vertical placement, the rotary-type voice coil motor mover (8a) of vertical deviation final controlling element (8) is connected with gas magnetic vibration-isolating platform stage body (6), and the rotary-type voice coil motor stator (8b) of vertical deviation final controlling element (8) is configured on vibration isolator bearing (4b).
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| CN201210571965.7A CN103090161B (en) | 2012-12-19 | 2012-12-19 | Gas magnetic vibration isolation platform based on spring zero position benchmark and laser auto-collimation measurement |
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Cited By (1)
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| CN110239734A (en) * | 2019-07-09 | 2019-09-17 | 郑州飞机装备有限责任公司 | A kind of tray platform that armstrong's patent is adjusted |
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