CN105352639A - Test system of impulse coupling efficiency of target under the action of laser - Google Patents
Test system of impulse coupling efficiency of target under the action of laser Download PDFInfo
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- CN105352639A CN105352639A CN201510638770.3A CN201510638770A CN105352639A CN 105352639 A CN105352639 A CN 105352639A CN 201510638770 A CN201510638770 A CN 201510638770A CN 105352639 A CN105352639 A CN 105352639A
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Abstract
The present invention provides a test system of an impulse coupling efficiency of a target under the action of a laser. The test system provided by the invention comprises: a compound pendulum device configured to dispose the target, a movable ruler device configured to detect the maximum swinging angle of the compound pendulum, a detection light source, an oscilloscope, a laser energy regulation unit and an energy meter. The compound pendulum device is composed of the compound pendulum and a compound pendulum support; and the movable ruler device is composed of a GHz photoelectric sensor, a one-dimensional translation stage and a horizontal slide rail. The impulse of a tested target is obtained under the laser irradiation through adoption of a photoelectric sensing unit and is configured to push the compound pendulum to reach the maximum swinging angle, the original impulse of the compound pendulum under the laser irradiation is obtained through adoption of the law of energy conservation, and the changing curve of the impulse coupling coefficient of the target is obtained through the dimensionless method of the impulse coupling efficiency when the laser single pulse energy is changed. The test system of an impulse coupling efficiency of a target under the action of a laser is applicable to the test of the impulse coupling efficiency of a target under the action of the laser in the target friction-free suspended state, and the precision measurement with a GHz dynamic response, a wide measurement range, a big swinging angle and high sensitivity is realized.
Description
Technical field
The invention belongs to field of optical measuring technologies, particularly laser is to target effect Impulse coupling efficiency test system, can be used for the optic test of laser to space debris effect Impulse coupling efficiency measurement, for the research of laser space debris Removal Technology.
Background technology
The Impulse coupling efficiency measurement that prior art obtains for target under laser action, most employing pendulum device hangs target, the initial velocity obtained under laser action by high speed photography or beam deflection method measurement acquisition target or angular velocity, again whole pendulum device is carried out to the rate integrating of all mass-elements, obtain system initial momentum or angular momentum.Another kind method is the maximum deflection angle that measurement pendulum device can arrive after laser action, and then obtains system initial momentum by conservation of energy principle conversion.But pendulum device mass distribution is difficult to Accurate Measurement, particularly for the target of distinctive appearance target or inner structure complexity, its mass distribution is difficult to Accurate Measurement, easily introduces comparatively big error for system barycenter and the mass-element constant volume really that distributes.For the application of the impulse coupling coefficient measurement that space debris obtains under laser action, just face fragment target inner structure complicated, be difficult to the problem of its mass distribution of Accurate Measurement.In addition, high speed photography can cause maximum pendulum angle measuring error due to limited frame per second, becomes another Measuring origin.
Also there is scholar by transient state mechanics sensor, the kickback pressure that target under laser action obtains directly is measured.But the measuring accuracy of this kind of method, Measuring Time resolution and range directly depend on the sensitivity of pressure transducer, responding range and range.The principle of work of piezo component determines it and must exchange larger range for by loss sensitivity and responding range.For the application of the impulse coupling coefficient measurement that space debris obtains under laser action, need to obtain making the maximized effect laser parameter of coupling coefficient, that is need pressure transducer needs to have the measurement range reaching gpa magnitude.On the other hand, the laser action source for space debris cleaning is nanosecond (10^-9s) pulsewidth, its in kickback pressure action time that the effect of fragment target surface produces in microsecond (10^-6s) magnitude.This just requires that pressure transducer at least has the responding range of MHz.Common piezoelectric ceramics pressure transducer that is stacking or Piezoelectric Film for Designing cannot meet the requirement of wide range and high response frequency simultaneously.
Also have report to adopt guide rail method, such as, adopt horizontal two-wire method for supporting to reduce friction force between guide rail and target, make the startup initial velocity that the initial average velocity of measured target in small initial distance obtains closer to it under laser action; Or employing air track, be approximately constant by the friction force produced by air film between target and guide rail, target carried out matching at the displacement data that the sequence moment produces to the rectilinear motion formula that all slows down, obtains the initial velocity that target obtains under laser action.But the drawback adopting guide rail method is apparent, especially the application that the impulse coupling coefficient obtained under laser action for space debris is measured, because space debris target is in when laser action without friction suspended state, the small kickback pressure that any laser action produces all can realize the effective momentum transfer to target.Thus the error that the friction force between guide rail and target causes for impulse coupling coefficient measurement will can not be ignored.
Summary of the invention
The object of the invention is to provide a kind of laser to space debris effect Impulse coupling efficiency test system, by greatly reducing friction to adapt to target without laser under friction suspended state to the test of target effect Impulse coupling efficiency.
In order to solve the problems of the technologies described above, the invention provides a kind of laser to target effect Impulse coupling efficiency test system, comprise the pendulum device for placing target, for detecting the removable scale device of physical pendulum maximum pendulum angle, probe source, oscillograph, trigger photoelectric sensor, effect laser instrument, the effect laser energy regulon be made up of half-wave plate and polaroid, energy meter and expand focus lens group; Pendulum device comprises physical pendulum and physical pendulum support; Physical pendulum is made up of two physical pendulum bridges, bracing member, the catoptron be arranged on bracing member, target fixed support; Two physical pendulum bridges, bracing member, target fixed support composition rectangular frames; Bracing member is sheet metal, and its lower limb is sharp edges, and sheet metal is vertically mounted on the upper end of two physical pendulum bridges, and target fixed support is arranged on the lower end of two physical pendulum bridges; Two physical pendulum bridges are high rigidity strip flake, and its thickness direction is vertical with physical pendulum swaying direction; Physical pendulum support is the sheet metal that two panels has sharp edges, and physical pendulum is placed on physical pendulum support by bracing member, and the sharp edges of bracing member contacts with the sharp edges of physical pendulum support; Removable scale device is by Gigahertz photoelectric sensor, one dimension translation stage, horizontal slide rail and can form along the scale of horizontal slide rail slip; Gigahertz photoelectric sensor is fixed on one dimension translation stage, and one dimension translation stage is arranged on scale, and can slide in the vertical direction along scale; Gigahertz photoelectric sensor and one dimension translation stage are connected with oscillograph at slide rail, and oscillograph is connected with triggering photoelectric sensor.
Further, the detection light that probe source sends, via after the catoptron reflection in pendulum device, impinges perpendicularly on the light-sensitive surface of the Gigahertz photoelectric sensor in removable scale device; Half-wave plate, polaroid and expand the optical axis coincidence of focus lens group, and make the spot center of effect laser on target and target center superposition.
Further, when detecting the small deflection angle of physical pendulum, regulate the position of one dimension translation stage on horizontal slide rail, make Gigahertz photoelectric sensor away from physical pendulum; Detection physical pendulum comparatively large deflection angle time, regulate the position of one dimension translation stage on horizontal slide rail, make Gigahertz photoelectric sensor near physical pendulum, within the displacement difference between photoelectric sensor reference position corresponding for physical pendulum maximum pendulum angle and final position is narrowed down to one dimension translation stage moving range.
Further, by priori measuring physical pendulum pivot angle and the corresponding relation nominal data collection of displacement difference between Gigahertz photoelectric sensor reference position and final position, by realizing the measurement of any maximum pendulum angle to this corresponding relation nominal data collection interpolation.
Further, the method obtaining corresponding relation nominal data collection is, use screw-thread micrometer to aim at the target center be positioned on target fixed support, and the Radiation Center of laser on target is overlapped with the aligned position of screw-thread micrometer, using screw-thread micrometer reading now as target reference position; Make target move micro-displacement s by screw-thread micrometer, and record the final position of Gigahertz photoelectric sensor, thus obtain corresponding relation nominal data collection between displacement s and Gigahertz photoelectric sensor final position; Then pass through displacement s and Gigahertz photoelectric sensor final position corresponding relation nominal data collection and formula s=lsin (θ) and obtain physical pendulum pivot angle θ and photoelectric sensor final position corresponding relation nominal data collection.
Further, obtain when i-th laser single-pulse energy is E according to following formula
itime, relative 1st laser single-pulse energy is E
1time maximum thrust coupling coefficient C
i/ C
1,
Wherein, θ
1be laser single-pulse energy be E
1time physical pendulum maximum pendulum angle, θ
ibe laser single-pulse energy be E
itime physical pendulum maximum pendulum angle, C
1be 1 laser single-pulse energy be E
1time impulse coupling coefficient, C
ibe i laser single-pulse energy be E
itime impulse coupling coefficient.
The present invention compared with prior art, its remarkable advantage is, (1) between physical pendulum and physical pendulum support, realize by the contact of sharp metal edges and supporting way the 0 frictional resistance state that is close to, so that simulation target is marked on without laser under friction suspended state target effect Impulse coupling efficiency test more realistically; (2) by Gigahertz photoelectric sensor, Gigahertz high dynamic response scope is realized; (3) increased by removable scale device and reduce the distance between photoelectric sensor and pendulum device, high sensitivity and wide range can be realized respectively; (4) physical pendulum pivot angle is measured and displacement difference corresponding relation nominal data collection between photoelectric sensor reference position and final position, thus can by realizing the accurate measurement of any maximum pendulum angle to this corresponding relation nominal data collection interpolation; (5) error may introduced because physical pendulum mass distribution difficulty determines is eliminated by nondimensionalization Impulse coupling efficiency.
Accompanying drawing explanation
Fig. 1 is that laser of the present invention is to space debris effect Impulse coupling efficiency test system schematic diagram.
Fig. 2 is pendulum device schematic diagram in the present invention.
Fig. 3 is removable scale device schematic diagram in the present invention.
Fig. 4 is pendulum device schematic diagram when reaching pivot angle θ.
Fig. 5 be on physical pendulum target center along x-axis positive dirction displacement s and the corresponding relation nominal data collection making to detect photoelectric sensor final position when light can be incident to photoelectric sensor light-sensitive surface center.
Fig. 6 is that Impulse coupling efficiency is with effect laser energy density variation relation schematic diagram.
Embodiment
Easy understand, according to technical scheme of the present invention, when not changing connotation of the present invention, one of ordinary skill in the art can be imagined and the numerous embodiments of laser of the present invention to target effect Impulse coupling efficiency test system.Therefore, following embodiment and accompanying drawing are only the exemplary illustrations to technical scheme of the present invention, and should not be considered as of the present invention all or the restriction be considered as technical solution of the present invention or restriction.
See accompanying drawing 1, laser of the present invention is to target effect Impulse coupling efficiency test system, primarily of the pendulum device A for placing target, for detecting the removable scale device B of physical pendulum maximum pendulum angle, probe source 17, oscillograph 10, trigger photoelectric sensor 11, effect laser instrument 12, the effect laser energy regulon be made up of half-wave plate 13 and polaroid 14, energy meter 15 and expand focus lens group 16 and form.
Pendulum device A comprises physical pendulum and physical pendulum support 4.Physical pendulum is made up of two physical pendulum bridges 1, bracing member 5, the catoptron 2 be arranged on bracing member 5, target fixed support 3.Two physical pendulum bridges 1, bracing member 5, target fixed supports 3 form rectangular frame; Bracing member 5 is sheet metal, and its lower limb is sharp edges, and sheet metal is vertically mounted on the upper end of two physical pendulum bridges 1, and target fixed support 3 is arranged on the lower end of two physical pendulum bridges 1; Two physical pendulum bridges 1 are high rigidity strip flake, and its thickness direction is vertical with physical pendulum swaying direction.Physical pendulum support 4 has the sheet metal of sharp edges for two panels, and physical pendulum is placed on physical pendulum support 4 by bracing member 5, and the sharp edges of bracing member 5 contacts with the sharp edges of physical pendulum support 4.
Removable scale device B is made up of Gigahertz photoelectric sensor 6, one dimension translation stage 7, horizontal slide rail 8 and the scale 9 that can slide along horizontal slide rail 8.Gigahertz photoelectric sensor 6 is connected with oscillograph 10, and oscillograph 10 is connected with triggering photoelectric sensor 11.Gigahertz photoelectric sensor 6 is fixed on one dimension translation stage 7, and one dimension translation stage 7 is arranged on scale 9 by trip bolt, and can slide in the vertical direction along scale 9.One dimension translation stage 7 can be made to slide on scale 9 by the trip bolt regulating one dimension translation stage 7 to be connected with scale 9, Gigahertz photoelectric sensor 6 and the glide direction of one dimension translation stage 7 on slide rail 8 parallel with photoelectric sensor light-sensitive surface normal direction.
In the present embodiment, probe source 17 is continuous conductor laser, and its power is 75mw, and the change of continuous working 10 one hour rated output is less than 2%, and wavelength is 660nm.When using native system, the detection light that probe source 17 is sent impinges perpendicularly on the Gigahertz photoelectric sensor 6 in removable scale device B after reflecting via the catoptron 2 on pendulum device A.The maximum 440mJ of single pulse energy of the effect laser that effect laser instrument 12 is launched, pulsewidth 7ns, wavelength 1064nm.Half-wave plate 13, polaroid 14 and expand focus lens group 16 optical axis coincidence, and make the spot center of effect laser on target and target center superposition.Be incident to target surface by effect laser, momentum transmission is produced to target; And then can swing be produced for fixed target target physical pendulum, the maximum pendulum angle of physical pendulum can be detected by removable scale device B, thus obtain effect laser to the Impulse coupling efficiency of target.
(1) the present invention is contacted by sharp metal edges and supports and realizes being close to the state without frictional resistance.
Composition graphs 1, the fixing two high rigidity strip thin slices composition physical pendulum bridges 1 of the sheet metal 5 that in the present invention, pendulum device utilizes to have a sharp edges and sheet metal 5 two ends, two high rigidity strip sheet thickness directions are vertical with physical pendulum swaying direction, to reduce physical pendulum bridge 1 the being subject to deformation of laser action generation kickback pressure effect moment in Impact direction generation as far as possible.The sticky note catoptron 2 in sheet metal 5 surface, to reflex to photoelectric sensor by detection light at physical pendulum in swing process.Target fixed support 3 is fixed with, for placing target between the other end of two high rigidity strip thin slices of physical pendulum bridge 1.
By two to the sheet metal composition physical pendulum support 4 with sharp edges in obtuse angle, the sheet metal 5 in physical pendulum bridge 1 is vertically positioned on physical pendulum support 4, the sharp edges of physical pendulum support 4 is contacted with the sharp edges of sheet metal 5.In such cases, contact point is between the two the geometric point of near ideal, and friction force levels off to 0.
(2) the present invention is by Gigahertz photoelectric sensor and the combination of removable scale, realizes high dynamic response scope, high sensitivity and wide range.
Composition graphs 2, the photoelectric sensor 6 photoelectric response time rising edge being only 2ns is fixed on one dimension translation stage 7, to read photoelectric sensor 6 locus in vertical direction by scale 9.One dimension translation stage 7 is vertically fixed on horizontal slide rail 8 together with photoelectric sensor 6, and with photoelectric sensor 6 and one dimension translation stage 7, the glide direction on slide rail 8 is parallel with photoelectric sensor light-sensitive surface normal direction.
Composition graphs 1, makes detection light reflect via catoptron 2, the rear center being incident to photoelectric sensor 6 light-sensitive surface along slide rail 8 line of travel.Photoelectric sensor 6 is connected with oscillograph 10, for reading detection light signal.First record pendulum device static time photoelectric sensor 6 height be in the vertical direction fixed on one dimension translation stage 7 be physical pendulum upright position, and as the reference position of photoelectric sensor 6, be the corresponding equivalent position of physical pendulum when zero degree turn angle.When laser action is in target, can produce momentum transmission to physical pendulum makes physical pendulum swing, now by moving the marginal position that one dimension translation stage 7 makes photoelectric sensor 6 move to detection light vertical oscillation to reach in the vertical direction, now record the final position of one dimension translation stage height in the vertical direction as photoelectric sensor 6, be the equivalent position of corresponding physical pendulum maximum pendulum angle.Owing to being connected to oscillograph 10, oscillograph 10 just can shown the mark of detection light signal as photoelectric sensor arrival final position.
For the detection of physical pendulum small deflection angle, by regulating the position of one dimension translation stage 7 on horizontal slide rail 8, make photoelectric sensor 6 away from physical pendulum, thus the displacement difference d amplified between photoelectric sensor 6 reference position corresponding to same physical pendulum maximum pendulum angle and final position, d is read by scale 9, namely improves the measurement sensistivity that test macro transmits target micro impulse for laser.For the detection of physical pendulum compared with large deflection angle, by regulating the position of one dimension translation stage 7 on horizontal slide rail 8, make photoelectric sensor near physical pendulum, thus the displacement difference d reduced between photoelectric sensor 6 reference position corresponding to same physical pendulum maximum pendulum angle and final position is within one dimension translation stage moving range, namely improves the measurement range that test macro transmits target momentum for laser.
(3) the present invention passes through the displacement difference d corresponding relation nominal data collection of priori measuring physical pendulum pivot angle θ and photoelectric sensor 6 reference position and final position, thus by realizing the accurate measurement of any maximum pendulum angle to this corresponding relation nominal data collection interpolation.
As shown in Figure 2, make screw-thread micrometer 5 aim at the target center being positioned on target fixed support 3, screw-thread micrometer reading is now as target reference position.And in experiment test, make the Radiation Center of laser on target overlap with the aligned position of screw-thread micrometer 5.Target is made to move micro-displacement s by screw-thread micrometer 5, and the final position of recording light electric transducer 6, obtain corresponding relation nominal data collection between displacement s and photoelectric sensor 6 final position.L is that physical pendulum hangs fulcrum and target centre distance, and θ is physical pendulum pivot angle, now can obtain s=lsin (θ).So, physical pendulum pivot angle θ and photoelectric sensor 6 final position corresponding relation nominal data collection can be obtained by displacement s and photoelectric sensor 6 final position corresponding relation nominal data collection and formula s=lsin (θ), and then by photoelectric sensor 6 final position of experimental record can be obtained any physical pendulum pivot angle θ reading to this corresponding relation nominal data collection interpolation.
(4) the present invention eliminates physical pendulum mass distribution by nondimensionalization Impulse coupling efficiency and is difficult to determine and the error that may introduce.
Pendulum device equivalent mass m can be obtained when equivalent pendulum length is L at i-th laser single-pulse energy E according to as shown in the formula (1) and formula (2)
iinitial momentum p under effect
i, initial momentum p
ishown in (3).H shown in formula (2)
ifor pendulum device is at laser single-pulse energy E
ithe lower barycenter of effect raises distance.Due to the present invention it is of concern that find and make pendulum device shown in formula (4) at i-th laser single-pulse energy E
ithe lower momentum-coupling coefficient C of effect
imaximized laser parameter, so can the nondimensionalization method shown in through type (5) obtain, when laser single-pulse energy is E
itime, relative 1st laser single-pulse energy is E
1time maximum thrust coupling coefficient C
i/ C
1.
h
i＝L(1-cosθ
i)(2)
Wherein, θ
1be laser single-pulse energy be E
1time physical pendulum and the maximum pendulum angle of target, θ
ibe laser single-pulse energy be E
itime physical pendulum and the maximum pendulum angle of target, C
1be 1 laser single-pulse energy be E
1time impulse coupling coefficient, C
ibe i laser single-pulse energy be E
itime impulse coupling coefficient.
In the present embodiment, probe source 17 is continuous conductor laser, and its power is 75mw, and the change of continuous working 10 one hour rated output is less than 2%, and wavelength is 660nm.The detection light that probe source 17 is sent impinges perpendicularly on the Gigahertz photoelectric sensor 6 in removable scale device B after reflecting via the catoptron 2 on pendulum device A.The maximum 440mJ of single pulse energy of the effect laser that effect laser instrument 12 is launched, pulsewidth 7ns, wavelength 1064nm.Half-wave plate 13, polaroid 14 and expand focus lens group 16 optical axis coincidence, and make the spot center of effect laser on target and target center superposition.Be incident to target surface by effect laser, momentum transmission is produced to target; And then can swing be produced for fixed target target physical pendulum, the maximum pendulum angle of physical pendulum can be detected by the Gigahertz photoelectric sensor 6 in removable scale device B, thus obtain effect laser to the Impulse coupling efficiency of target.
When target remains static, regulate the position of detection light and Gigahertz photoelectric sensor 6, make detection light can be incident to Gigahertz photoelectric sensor 6 light-sensitive surface center along the line of travel of horizontal slide rail 8 (i.e. the normal direction of Gigahertz photoelectric sensor 6), now oscillograph 10 reads the photosignal that Gigahertz photoelectric sensor 6 records and reaches maximal value, and records the reference position of height as Gigahertz photoelectric sensor 6 of the vertical direction of Gigahertz photoelectric sensor 6.Before measurement starts, demarcate target center on physical pendulum along x-axis positive dirction displacement s and the corresponding relation data set making to detect Gigahertz photoelectric sensor 6 final position when light can be incident to Gigahertz photoelectric sensor 6 light-sensitive surface center, as shown in Figure 3.When acting on laser instrument 12 monopulse bright dipping, the detection light signal that Gigahertz photoelectric sensor 6 obtains is recorded by triggering photoelectric sensor 11 trigger oscillographic device 10, to obtain Gigahertz photoelectric sensor 6 maximum displacement d corresponding when physical pendulum reaches maximum pendulum angle, thus obtain target center maximum displacement s by corresponding relation nominal data collection interpolation, and then calculate physical pendulum maximum pendulum angle θ; Simultaneously by the single pulse energy of energy meter 15 monitoring effect laser instrument 12, to calculate energy coupling efficiency.The effect laser energy regulon consisted of half-wave plate 13 and polaroid 14 changes to large the laser energy acting on target from little, and records physical pendulum maximum pendulum angle corresponding to each laser energy, and carries out 5 tests and average.After completing one group of experiment, when through type (5) calculates and obtains laser single-pulse energy change, to the impulse coupling coefficient change curve of target, and then obtain laser energy density when making Impulse coupling efficiency maximum, as shown in Figure 4.
In the present invention physical pendulum and physical pendulum support engagement edge sharp to reduce friction force as far as possible, and by the catoptron being fixed on physical pendulum bridge, detection light is reflexed to photoelectric sensing to detect physical pendulum maximum pendulum angle; Removable scale device conveniently can catch the momentum transmission effects that High-speed transient effect source produces target, and adapts to different physical pendulum pivot angle testing range scope; By measuring physical pendulum pivot angle and photoelectric sensor reference position and final position displacement difference corresponding relation nominal data collection, thus by realizing the accurate measurement of any maximum pendulum angle to corresponding relation nominal data collection interpolation; Eliminate physical pendulum mass distribution by nondimensionalization Impulse coupling efficiency and measure the error that may introduce.The tested Impulse coupling efficiency that the present invention is suitable for can be the Impulse coupling efficiency of target under laser irradiation of various material, may also be the Impulse coupling efficiency of target under magnetic force pulse action, liquid or the effect of the momentary pulse such as gas jet impact, projectile impact power.
Claims (6)
1. a laser is to target effect Impulse coupling efficiency test system, it is characterized in that, comprise the pendulum device (A) for placing target, for detecting the removable scale device (B) of physical pendulum maximum pendulum angle, probe source (17), oscillograph (10), trigger photoelectric sensor (11), effect laser instrument (12), the effect laser energy regulon be made up of half-wave plate (13) and polaroid (14), energy meter (15) and expand focus lens group (16);
Pendulum device (A) comprises physical pendulum and physical pendulum support (4); Physical pendulum is made up of two physical pendulum bridges (1), bracing member (5), the catoptron (2) be arranged on bracing member (5), target fixed support (3); Two physical pendulum bridges (1), bracing member (5), target fixed supports (3) form rectangular frame; Bracing member (5) is sheet metal, and its lower limb is sharp edges, and sheet metal is vertically mounted on the upper end of two physical pendulum bridges (1), and target fixed support (3) is arranged on the lower end of two physical pendulum bridges (1); Two physical pendulum bridges (1) are high rigidity strip flake, and its thickness direction is vertical with physical pendulum swaying direction; Physical pendulum support (4) has the sheet metal of sharp edges for two panels, physical pendulum is placed on physical pendulum support (4) by bracing member (5), and the sharp edges of bracing member (5) contacts with the sharp edges of physical pendulum support (4);
Removable scale device (B) is made up of Gigahertz photoelectric sensor (6), one dimension translation stage (7), horizontal slide rail (8) and the scale (9) that can slide along horizontal slide rail (8); Gigahertz photoelectric sensor (6) is fixed on one dimension translation stage (7), and one dimension translation stage (7) is arranged on scale (9), and can slide in the vertical direction along scale (9); (glide direction on 8 is parallel with photoelectric sensor light-sensitive surface normal direction at slide rail for Gigahertz photoelectric sensor (6) and one dimension translation stage (7); Gigahertz photoelectric sensor (6) is connected with oscillograph (10), and oscillograph (10) is connected with triggering photoelectric sensor (11).
2. as claimed in claim 1 laser to target effect Impulse coupling efficiency test system, it is characterized in that, the detection light that probe source (17) sends, via after catoptron (2) reflection in pendulum device (A), impinges perpendicularly on the light-sensitive surface of the Gigahertz photoelectric sensor (6) in removable scale device (B); Half-wave plate (13), polaroid (14) and expand the optical axis coincidence of focus lens group (16), and make the spot center of effect laser on target and target center superposition.
3. as claimed in claim 1 laser to target effect Impulse coupling efficiency test system, it is characterized in that, when detecting the small deflection angle of physical pendulum, regulate one dimension translation stage (7) position on horizontal slide rail (8), make Gigahertz photoelectric sensor (6) away from physical pendulum; Detection physical pendulum comparatively large deflection angle time, regulate one dimension translation stage (7) position on horizontal slide rail (8), make Gigahertz photoelectric sensor (6) near physical pendulum, within photoelectric sensor (6) displacement difference between reference position and final position corresponding for physical pendulum maximum pendulum angle is narrowed down to one dimension translation stage moving range.
4. as claimed in claim 1 laser to target effect Impulse coupling efficiency test system, it is characterized in that, the corresponding relation nominal data collection of displacement difference between reference position and final position by priori measuring physical pendulum pivot angle and Gigahertz photoelectric sensor (6), by realizing the measurement of any maximum pendulum angle to this corresponding relation nominal data collection interpolation.
5. as claimed in claim 1 laser to target effect Impulse coupling efficiency test system, it is characterized in that, the method obtaining corresponding relation nominal data collection is, screw-thread micrometer (5) is used to aim at the target center being positioned at (3) on target fixed support, and the Radiation Center of laser on target is overlapped, using screw-thread micrometer reading now as target reference position with the aligned position of screw-thread micrometer (5); Target is made to move micro-displacement s by screw-thread micrometer (5), and record the final position of Gigahertz photoelectric sensor (6), thus obtain corresponding relation nominal data collection between displacement s and Gigahertz photoelectric sensor (6) final position; Then pass through displacement s and Gigahertz photoelectric sensor (6) final position corresponding relation nominal data collection and formula s=lsin (θ) and obtain physical pendulum pivot angle θ and photoelectric sensor (6) final position corresponding relation nominal data collection.
6. laser, to target effect Impulse coupling efficiency test system, is characterized in that as claimed in claim 1, obtains when i-th laser single-pulse energy is E according to following formula
itime, relative 1st laser single-pulse energy is E
1time maximum thrust coupling coefficient C
i/ C
1,
Wherein, θ
1be laser single-pulse energy be E
1time physical pendulum maximum pendulum angle, θ
ibe laser single-pulse energy be E
itime physical pendulum maximum pendulum angle, C
1be 1 laser single-pulse energy be E
1time impulse coupling coefficient, C
ibe i laser single-pulse energy be E
itime impulse coupling coefficient.
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| CN201510638770.3A CN105352639B (en) | 2015-09-30 | 2015-09-30 | A kind of laser acts on Impulse coupling efficiency test system to target |
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| CN201510638770.3A CN105352639B (en) | 2015-09-30 | 2015-09-30 | A kind of laser acts on Impulse coupling efficiency test system to target |
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| CN105352639A true CN105352639A (en) | 2016-02-24 |
| CN105352639B CN105352639B (en) | 2018-09-04 |
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| CN201510638770.3A Active CN105352639B (en) | 2015-09-30 | 2015-09-30 | A kind of laser acts on Impulse coupling efficiency test system to target |
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Cited By (4)
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| CN106950178A (en) * | 2017-03-30 | 2017-07-14 | 北京卫星环境工程研究所 | Laser measurement of impulse coupling coefficient based on flow field inverting |
| CN109655188A (en) * | 2019-01-14 | 2019-04-19 | 中国人民解放军国防科技大学 | Thrust impulse measuring system and method based on light polarization state measurement |
| CN109724771A (en) * | 2018-12-17 | 2019-05-07 | 中国空气动力研究与发展中心低速空气动力研究所 | It is a kind of for measuring the mono-pendulum type balance of underwater sailing body resistance |
| CN113405993A (en) * | 2021-06-23 | 2021-09-17 | 北京卫星环境工程研究所 | Device and method for measuring two-dimensional impulse of irregular target driven by laser ablation |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106950178A (en) * | 2017-03-30 | 2017-07-14 | 北京卫星环境工程研究所 | Laser measurement of impulse coupling coefficient based on flow field inverting |
| CN106950178B (en) * | 2017-03-30 | 2020-07-28 | 北京卫星环境工程研究所 | Laser impulse coupling coefficient measuring method based on flow field inversion |
| CN109724771A (en) * | 2018-12-17 | 2019-05-07 | 中国空气动力研究与发展中心低速空气动力研究所 | It is a kind of for measuring the mono-pendulum type balance of underwater sailing body resistance |
| CN109724771B (en) * | 2018-12-17 | 2020-07-14 | 中国空气动力研究与发展中心低速空气动力研究所 | Simple pendulum type balance for measuring underwater vehicle resistance |
| CN109655188A (en) * | 2019-01-14 | 2019-04-19 | 中国人民解放军国防科技大学 | Thrust impulse measuring system and method based on light polarization state measurement |
| CN113405993A (en) * | 2021-06-23 | 2021-09-17 | 北京卫星环境工程研究所 | Device and method for measuring two-dimensional impulse of irregular target driven by laser ablation |
| CN113405993B (en) * | 2021-06-23 | 2023-01-31 | 北京卫星环境工程研究所 | Device and method for measuring two-dimensional impulse of irregular target driven by laser ablation |
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