CN105352639B - A kind of laser acts on Impulse coupling efficiency test system to target - Google Patents
A kind of laser acts on Impulse coupling efficiency test system to target Download PDFInfo
- Publication number
- CN105352639B CN105352639B CN201510638770.3A CN201510638770A CN105352639B CN 105352639 B CN105352639 B CN 105352639B CN 201510638770 A CN201510638770 A CN 201510638770A CN 105352639 B CN105352639 B CN 105352639B
- Authority
- CN
- China
- Prior art keywords
- target
- pendulum
- laser
- physical pendulum
- photoelectric sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010168 coupling process Methods 0.000 title claims abstract description 45
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 45
- 230000008878 coupling Effects 0.000 title claims abstract description 44
- 238000012360 testing method Methods 0.000 title claims abstract description 25
- 238000013519 translation Methods 0.000 claims abstract description 30
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 239000000523 sample Substances 0.000 claims abstract description 10
- 238000013480 data collection Methods 0.000 claims description 23
- 230000000694 effects Effects 0.000 claims description 23
- 238000006073 displacement reaction Methods 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 5
- 230000005855 radiation Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 4
- 230000004044 response Effects 0.000 abstract description 4
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 230000009471 action Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005622 photoelectricity Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/26—Devices for measuring efficiency, i.e. the ratio of power output to power input
Abstract
The present invention proposes that a kind of laser acts on Impulse coupling efficiency test system to target, by the pendulum device for placing target, the removable scale device for detecting physical pendulum maximum pendulum angle, probe source, oscillograph, laser energy adjust unit, energy meter forms；Pendulum device is made of physical pendulum and physical pendulum holder；Removable scale device is made of GHz photoelectric sensors, one-dimensional translation stage and horizontal slide rail；The maximum pendulum angle for obtaining momentum under laser irradiation using the tested target of photoelectric sensing unit capture and physical pendulum being pushed to reach, and then obtain the initial momentum that physical pendulum obtains under laser irradiation using law of conservation of energy, and handled by the nondimensionalization of Impulse coupling efficiency, obtain the impulse coupling coefficient change curve to target when laser single-pulse energy changes.The present invention is adapted to target and acts on Impulse coupling efficiency test to target without laser under friction suspended state, and realizes GHz dynamic responses, machine with wide range, big swing angle, high sensitivity accurate measurement.
Description
Technical field
The invention belongs to field of optical measuring technologies, especially laser to act on Impulse coupling efficiency test system to target,
It can be used for the optic test that laser acts on space debris Impulse coupling efficiency measurement, ground for laser space debris Removal Technology
Study carefully.
Background technology
The Impulse coupling efficiency measurement that the prior art obtains target under laser action mostly uses greatly pendulum device suspension
Target is measured by high speed photography or light beam deflecting method and obtains the initial velocity or angle that target obtains under laser action
Speed, then the rate integrating of all mass-elements is carried out to entire pendulum device, obtain system initial momentum or angular momentum.It is another
Method is the maximum deflection angle that measures pendulum device and can be reached after laser action, and then is converted by conservation of energy principle
To system initial momentum.But pendulum device Mass Distribution is difficult to accurately measure, especially for distinctive appearance target or inside
Complicated target, Mass Distribution are difficult accurately to measure, and being distributed constant volume really for system barycenter and mass-element easily draws
Enter large error.For the application that the impulse coupling coefficient that space debris obtains under laser action measures, fragment target is just faced
It is complicated to mark internal structure, it is difficult to the problem of accurately measuring its Mass Distribution.In addition, high speed photography can be made due to limited frame per second
At maximum pendulum angle measurement error, become another Measuring origin.
Some scholars by transient state mechanics sensor, directly surveyed by the kickback pressure obtained to target under laser action
Amount.But the measurement accuracy of such method, time of measuring resolution ratio and range directly depend on pressure sensor sensitivity,
Responding range and range.The operation principle of piezo component determines it necessarily by losing sensitivity and dynamic response model
Enclose the range for exchanging bigger for.For the application that the impulse coupling coefficient that space debris obtains under laser action measures, need
Laser parameter is maximumlly acted on to the coefficient of coup is made, that is to say, that is needed pressure sensor needs to have and is reached gigapascal amount
The measurement range of grade.On the other hand, the laser action source for being used for space debris cleaning is nanosecond (10^-9s) pulsewidth, in fragment
The kickback pressure action time that target surface effect generates is in microsecond (10^-6s) magnitude.This requires pressure sensors at least to have
There is the responding range of MHz.Common piezoelectric ceramics stacks or the pressure sensor of Piezoelectric Film for Designing can not meet simultaneously
The requirement of wide range and high response frequency.
It also has been reported that using guide rail method, for example, by using horizontal two-wire method for supporting to reduce frictional force between guide rail and target,
So that the startup that initial average speed of the measured target in small starting distance is obtained closer to it under laser action
Initial velocity；Or air track is used, it is approximately constant by the frictional force for generating air film between target and guide rail, by target in sequence
The displacement data that the row moment generates is fitted the linear motion formula that slows down, obtain that target obtains under laser action just
Beginning speed.But the drawbacks of using guide rail method is it will be apparent that being rushed especially for what space debris obtained under laser action
The application that the coefficient of coup measures is measured, because space debris target is in laser action without friction suspended state, any laser
The small kickback pressure that effect generates can all realize effective momentum transmission to target.The thus frictional force pair between guide rail and target
The error caused by impulse coupling coefficient measures will can not be ignored.
Invention content
Present invention aims at a kind of laser of offer to act on Impulse coupling efficiency test system to space debris, by very big
Ground reduces frictional force to adapt to target without test of the laser to target effect Impulse coupling efficiency under friction suspended state.
In order to solve the above technical problem, the present invention provides a kind of laser to target effect Impulse coupling efficiency test system
System, includes the pendulum device for placing target, the removable scale device for detecting physical pendulum maximum pendulum angle, probe source,
Oscillograph triggers photoelectric sensor, acts on laser, by half-wave plate and polarizer group at effect laser energy adjust unit,
Energy meter and expand focus lens group；Pendulum device includes physical pendulum and physical pendulum holder；Physical pendulum is by two physical pendulum bridges, supporting rods
Frame, the speculum on bracing member, target fixing bracket composition；Two physical pendulum bridges, bracing member, target fix branch
Frame forms rectangular frame；Bracing member is sheet metal, and lower edge is sharp edges, and sheet metal is vertically mounted on two physical pendulum bars
The upper end of frame, target fixing bracket are mounted on the lower end of two physical pendulum bridges；Two physical pendulum bridges are high rigidity strip thin slice
Shape, thickness direction are vertical with physical pendulum swaying direction；Physical pendulum holder is the sheet metal that two panels has sharp edges, and physical pendulum passes through branch
Supporting pole rack is placed on physical pendulum holder, and the sharp edges of bracing member are in contact with the sharp edges of physical pendulum holder；Removable mark
Ruler device is by Gigahertz photoelectric sensor, one-dimensional translation stage, horizontal slide rail and can be formed along the scale of horizontal slide rail sliding；
Gigahertz photoelectric sensor is fixed in one-dimensional translation stage, and one-dimensional translation stage is mounted on scale, and can hung down along scale
Histogram is to sliding；Gigahertz photoelectric sensor and one-dimensional translation stage are connect in sliding rail with oscillograph, oscillograph and triggering light
Electric transducer connects.
Further, after the detection light that probe source is sent out is via the speculum reflection in pendulum device, impinging perpendicularly on can
On the photosurface of Gigahertz photoelectric sensor in mobile scale device；Half-wave plate, polarizing film and expand focus lens group
Optical axis coincidence, and spot center of the effect laser on target is made to be overlapped with target center.
Further, when detecting the small deflection angle of physical pendulum, position of the one-dimensional translation stage on horizontal slide rail is adjusted, gigahertz is made
Hereby photoelectric sensor is far from physical pendulum；When detecting physical pendulum compared with large deflection angle, position of the one-dimensional translation stage on horizontal slide rail is adjusted, is made
Gigahertz photoelectric sensor close to physical pendulum, by the corresponding photoelectric sensor initial position of physical pendulum maximum pendulum angle and final position it
Between displacement difference narrow down within one-dimensional translation stage moving range.
Further, pass through priori measuring physical pendulum pivot angle and Gigahertz photoelectric sensor initial position and final position
Between displacement difference correspondence nominal data collection, by realizing arbitrary maximum pendulum angle to the correspondence nominal data collection interpolation
Measurement.
Further, the method for obtaining correspondence nominal data collection is to be aligned using screw-thread micrometer and fixed positioned at target
Target center on holder, and Radiation Center of the laser on target is made to be overlapped with the alignment position of screw-thread micrometer, it will at this time
Screw-thread micrometer reading be used as target initial position；So that target is moved micro-displacement s by screw-thread micrometer, and records gigabit
The final position of hertz photoelectric sensor, to obtain corresponding pass between displacement s and Gigahertz photoelectric sensor final position
It is nominal data collection；Then pass through displacement s and Gigahertz photoelectric sensor final position correspondence nominal data collection and public affairs
Formula s=lsin (θ) obtains physical pendulum pivot angle θ and photoelectric sensor final position correspondence nominal data collection.
Further, it is obtained according to following formula when ith laser single-pulse energy is EiWhen, opposite 1st laser simple venation
It is E to rush energy1When maximum thrust coefficient of coup Ci/C1,
Wherein, θ1Be laser single-pulse energy be E1When physical pendulum maximum pendulum angle, θiBe laser single-pulse energy be EiShi Fu
The maximum pendulum angle of pendulum, C1Be 1 laser single-pulse energy it is E1When impulse coupling coefficient, CiIt is that i laser single-pulse energy is
EiWhen impulse coupling coefficient.
Compared with prior art, the present invention its remarkable advantage is, (1) passes through sharp gold between physical pendulum and physical pendulum holder
Intimate 0 frictional resistance state is realized in the contact and supporting way for belonging to edge, is suspended without friction to simulate realistically target
Laser acts on Impulse coupling efficiency test to target under state；(2) by Gigahertz photoelectric sensor, realize that Gigahertz is high
Responding range；(3) increase and reduce the distance between photoelectric sensor and pendulum device by removable scale device, it can
Highly sensitive and wide range is realized respectively；(4) meta position of physical pendulum pivot angle and photoelectric sensor initial position and final position is measured
Poor correspondence nominal data collection is moved, so as to by realizing arbitrary maximum pendulum angle to the correspondence nominal data collection interpolation
Accurate measurement；(5) mistake that may be introduced because physical pendulum Mass Distribution difficulty is determining is eliminated by nondimensionalization Impulse coupling efficiency
Difference.
Description of the drawings
Fig. 1 is that laser of the present invention acts on Impulse coupling efficiency test system schematic diagram to space debris.
Fig. 2 is pendulum device schematic diagram in the present invention.
Fig. 3 is that scale device schematic diagram is moved in the present invention.
Fig. 4 is schematic diagram when pendulum device reaches pivot angle θ.
Fig. 5 be on physical pendulum target center along positive direction of the x-axis displacement s and allow detect light be incident to photoelectric sensing
The correspondence nominal data collection of photoelectric sensor final position when device photosurface center.
Fig. 6 is Impulse coupling efficiency with effect laser energy density variation relation schematic diagram.
Specific implementation mode
It is readily appreciated that, technical solution according to the present invention, in the case where not changing the connotation of the present invention, this field
Those skilled in the art can imagine laser of the present invention to target act on Impulse coupling efficiency test system a variety of embodiment party
Formula.Therefore, detailed description below and attached drawing are only the exemplary illustrations to technical scheme of the present invention, and are not to be construed as
The whole of the present invention is considered as limitation or restriction to technical solution of the present invention.
Referring to attached drawing 1, laser of the present invention acts on Impulse coupling efficiency test system to target, mainly by being used to place
The pendulum device A of target, the removable scale device B for detecting physical pendulum maximum pendulum angle, probe source 17, oscillograph 10 touch
Shine electric transducer 11, acts on laser 12, and unit, energy are adjusted by the effect laser energy that half-wave plate 13 and polarizing film 14 form
Gauge 15 and expand focus lens group 16 composition.
Pendulum device A includes physical pendulum and physical pendulum holder 4.Physical pendulum by two physical pendulum bridges 1, bracing member 5, be mounted on support
Speculum 2, target fixing bracket 3 on bridge 5 form.Two physical pendulum bridges 1, bracing member 5, target fixing bracket 3 form
Rectangular frame；Bracing member 5 is sheet metal, and lower edge is sharp edges, and sheet metal is vertically mounted on two physical pendulum bridges 1
Upper end, target fixing bracket 3 are mounted on the lower end of two physical pendulum bridges 1；Two physical pendulum bridges 1 are high rigidity strip thin slice
Shape, thickness direction are vertical with physical pendulum swaying direction.Physical pendulum holder 4 is the sheet metal that two panels has sharp edges, and physical pendulum passes through
Bracing member 5 is placed on physical pendulum holder 4, and the sharp edges of bracing member 5 are in contact with the sharp edges of physical pendulum holder 4.
Removable scale device B is by Gigahertz photoelectric sensor 6, one-dimensional translation stage 7, horizontal slide rail 8 and can be along water
The scale 9 that smooth rail 8 slides forms.Gigahertz photoelectric sensor 6 is connect with oscillograph 10, oscillograph 10 and triggering photoelectric transfer
Sensor 11 connects.Gigahertz photoelectric sensor 6 is fixed in one-dimensional translation stage 7, and one-dimensional translation stage 7 is installed by trip bolt
On scale 9, and it can be slided in vertical direction along scale 9.The fastening spiral shell being connect with scale 9 by adjusting one-dimensional translation stage 7
Nail can be such that one-dimensional translation stage 7 is slided on scale 9, and Gigahertz photoelectric sensor 6 and one-dimensional translation stage 7 are on sliding rail 8
Glide direction is parallel with photoelectric sensor photosurface normal direction.
Probe source 17 is continuous conductor laser in the present embodiment, power 75mw, and continuous work 10 hours is defeated
Go out changed power and is less than 2%, wavelength 660nm.When using this system, the detection light that probe source 17 is sent out is made to be filled via physical pendulum
After setting the reflection of speculum 2 on A, the Gigahertz photoelectric sensor 6 in removable scale device B is impinged perpendicularly on.Effect swashs
Single pulse energy the maximum 440mJ, pulsewidth 7ns, wavelength 1064nm for the effect laser that light device 12 emits.Half-wave plate 13, polarizing film
14 and 16 optical axis coincidence of focus lens group is expanded, and spot center of the effect laser on target is made to be overlapped with target center.It is logical
Effect laser light incident is crossed to target surface, momentum is generated to target and is transmitted；And then the physical pendulum for fixing target will produce swing,
The maximum pendulum angle of physical pendulum can be detected by moving scale device B, the Impulse coupling of target is imitated to obtain effect laser
Rate.
(1) present invention, which is contacted and supported by sharp metal edges, realizes the almost state without frictional resistance.
In conjunction with Fig. 1, pendulum device utilizes 5 both ends of sheet metal 5 and sheet metal with sharp edges in the present invention
Fixed two high rigidities strip thin slice composition physical pendulum bridge 1, two high rigidity strip sheet thickness directions are put with physical pendulum
Dynamic direction is vertical, and kickback pressure effect moment is being generated in Impact direction by laser action to reduce physical pendulum bridge 1 to the greatest extent
The deformation of generation.5 surface of sheet metal pastes speculum 2, to detect light reflection in swing process to photoelectric transfer in physical pendulum
Sensor.It is fixed with target fixing bracket 3 between the other end of two high rigidity strip thin slices of physical pendulum bridge 1, for placing
Target.
Physical pendulum holder 4 is formed by two pairs of sheet metals with sharp edges in obtuse angle, by the metal in physical pendulum bridge 1
Piece 5 is disposed vertically on physical pendulum holder 4, making the sharp edges of physical pendulum holder 4 be contacted with the sharp edges of sheet metal 5.Such
In the case of, contact point between the two is the geometric point of near ideal, and frictional force levels off to 0.
(2) present invention is combined by Gigahertz photoelectric sensor and removable scale, realizes high dynamic response range, height
Sensitivity and wide range.
In conjunction with Fig. 2, the photoelectric sensor 6 that photoelectric respone time rising edge is only 2ns is fixed in one-dimensional translation stage 7,
The spatial position of photoelectric sensor 6 in vertical direction is read will pass through scale 9.One-dimensional translation stage 7 is together with photoelectric sensor 6
It is perpendicularly fixed at horizontal slide rail 8, with the glide direction and photoelectric sensing of photoelectric sensor 6 and one-dimensional translation stage 7 on sliding rail 8
Device photosurface normal direction is parallel.
In conjunction with Fig. 1, detection light is made to be reflected via speculum 2, after be incident to photoelectric sensor 6 along 8 line of travel of sliding rail and feel
The center of smooth surface.Photoelectric sensor 6 is connected with oscillograph 10, for reading detection optical signal.Record pendulum device first is quiet
The photoelectric sensor 6 being fixed on when only in one-dimensional translation stage 7 is physical pendulum upright position in the height of vertical direction, and as photoelectricity
The initial position of sensor 6, equivalent position of the as corresponding physical pendulum at zero degree turn angle.It, can be right when laser action is in target
Physical pendulum, which generates momentum transmission, makes physical pendulum swing, and so that photoelectric sensor 6 is moved by moving one-dimensional translation stage 7 in vertical direction at this time
To the attainable marginal position of detection light vertical oscillation institute, one-dimensional translation stage is recorded at this time in the height of vertical direction as photoelectricity
The final position of sensor 6, the equivalent position of as corresponding physical pendulum maximum pendulum angle.It, can be by oscillography due to being connected to oscillograph 10
Device 10 reaches the mark of final position just showing detection optical signal as photoelectric sensor.
Detection for physical pendulum small deflection angle makes photoelectricity by adjusting position of the one-dimensional translation stage 7 on horizontal slide rail 8
Sensor 6 far from physical pendulum, to amplify corresponding 6 initial position of photoelectric sensor of same physical pendulum maximum pendulum angle and final position it
Between displacement difference d, d read by scale 9, that is, it is sensitive to improve the measurement that test system transmits target micro impulse laser
Degree.Detection for physical pendulum compared with large deflection angle makes photoelectric sensing by adjusting position of the one-dimensional translation stage 7 on horizontal slide rail 8
Device is close to physical pendulum, to reduce between corresponding 6 initial position of photoelectric sensor of same physical pendulum maximum pendulum angle and final position
Within displacement difference d to one-dimensional translation stage moving range, that is, improve the measurement that test system transmits target momentum laser
Range.
(3) position that the present invention passes through priori measuring physical pendulum pivot angle θ and photoelectric sensor 6 initial position and final position
Difference d correspondence nominal data collection is moved, to by realizing arbitrary maximum pendulum angle to the correspondence nominal data collection interpolation
It is accurate to measure.
As shown in Fig. 2, making the target center that the alignment of screw-thread micrometer 5 is located on target fixing bracket 3, spiral at this time is surveyed
Micro- meter reading is used as target initial position.And make Radiation Center of the laser on target and screw-thread micrometer 5 in experiment test
Alignment position overlap.So that target is moved micro-displacement s by screw-thread micrometer 5, and records the stop bit of photoelectric sensor 6
It sets, obtains correspondence nominal data collection between 6 final position of displacement s and photoelectric sensor.L is that physical pendulum hangs fulcrum and target
Centre distance, θ are physical pendulum pivot angle, can obtain s=lsin (θ) at this time.Then, it can be terminated by displacement s and photoelectric sensor 6
Position correspondence nominal data collection and formula s=lsin (θ) obtain physical pendulum pivot angle θ and 6 final position pair of photoelectric sensor
Should be related to nominal data collection, so by by 6 final position of photoelectric sensor of experimental record to the correspondence nominal data
Collection interpolation can obtain arbitrary physical pendulum pivot angle θ readings.
(4) present invention eliminates possible introducing by physical pendulum Mass Distribution is difficult to determine by nondimensionalization Impulse coupling efficiency
Error.
It is sharp in ith in a length of L of equivalent penduleum that pendulum device equivalent mass m can be obtained according to such as following formula (1) and formula (2)
Light single pulse energy EiInitial momentum p under effecti, initial momentum piAs shown in formula (3).H shown in formula (2)iExist for pendulum device
Laser single-pulse energy EiThe lower barycenter of effect increases distance.It is found since the present invention concerns so that physical pendulum shown in formula (4) fills
It sets in ith laser single-pulse energy EiThe lower momentum-coupling coefficient C of effectiMaximized laser parameter can then pass through formula
(5) nondimensionalization method shown in obtains, when laser single-pulse energy is EiWhen, opposite 1st laser single-pulse energy is E1When
Maximum thrust coefficient of coup Ci/C1。
hi=L (1-cos θi) (2)
Wherein, θ1Be laser single-pulse energy be E1When physical pendulum and target maximum pendulum angle, θiIt is that laser single-pulse energy is
EiWhen physical pendulum and target maximum pendulum angle, C1Be 1 laser single-pulse energy it is E1When impulse coupling coefficient, CiIt is i laser
Single pulse energy is EiWhen impulse coupling coefficient.
Probe source 17 is continuous conductor laser in the present embodiment, power 75mw, and continuous work 10 hours is defeated
Go out changed power and is less than 2%, wavelength 660nm.So that the detection light that probe source 17 is sent out is via the reflection on pendulum device A
After mirror 2 reflects, the Gigahertz photoelectric sensor 6 in removable scale device B is impinged perpendicularly on.Act on what laser 12 emitted
Act on single pulse energy the maximum 440mJ, pulsewidth 7ns, wavelength 1064nm of laser.Half-wave plate 13, polarizing film 14 and expand focusing
16 optical axis coincidence of lens group, and spot center of the effect laser on target is made to be overlapped with target center.Entered by acting on laser
It is incident upon target surface, generating momentum to target transmits；And then the physical pendulum for fixing target will produce swing, pass through removable mark
Gigahertz photoelectric sensor 6 in ruler device B can detect the maximum pendulum angle of physical pendulum, to obtain effect laser to target
Impulse coupling efficiency.
When target remains static, the position of detection light and Gigahertz photoelectric sensor 6 is adjusted, makes detection light can be with
Line of travel (i.e. the normal direction of Gigahertz photoelectric sensor 6) along horizontal slide rail 8 is incident to Gigahertz photoelectric sensing
6 photosurface center of device, the photosignal that the reading Gigahertz of oscillograph 10 photoelectric sensor 6 measures at this time reach maximum value, and
Record initial position of the height of the vertical direction of Gigahertz photoelectric sensor 6 as Gigahertz photoelectric sensor 6.It measures
Before beginning, target center along positive direction of the x-axis displacement s and allows detection light to be incident to Gigahertz light on calibration physical pendulum
The corresponding relation data collection of 6 final position of Gigahertz photoelectric sensor when 6 photosurface center of electric transducer, as shown in Figure 3.When
When acting on 12 pulse light extraction of laser, 10 start recording Gigahertz photoelectric transfer of oscillograph is triggered by triggering photoelectric sensor 11
The detection optical signal that sensor 6 obtains, it is maximum to obtain corresponding Gigahertz photoelectric sensor 6 when physical pendulum reaches maximum pendulum angle
Displacement d to obtain target center maximum displacement s by correspondence nominal data collection interpolation, and then calculates physical pendulum maximum
Pivot angle θ；The single pulse energy for acting on laser 12 by 15 monitoring of energy meter simultaneously, to calculate energy coupling efficiency.Pass through
The effect laser energy that half-wave plate 13 and polarizing film 14 form adjusts the laser energy that unit acts on target from as low as big change,
And the corresponding physical pendulum maximum pendulum angle of each laser energy is recorded, and carry out 5 tests and be averaged.After completing one group of experiment, lead to
When crossing formula (5) calculating acquisition laser single-pulse energy change, to the impulse coupling coefficient change curve of target, and then made
Laser energy density when Impulse coupling efficiency maximum, as shown in Figure 4.
Physical pendulum and physical pendulum holder engagement edge are sharp to reduce frictional force as far as possible in the present invention, and by being fixed on physical pendulum
The speculum of bridge will detect light reflection to photoelectric sensing to detect physical pendulum maximum pendulum angle；Removable scale device can conveniently be caught
The momentum transmission effects that High-speed transient effect source generates target is caught, and adapts to different physical pendulum pivot angle testing range ranges；Pass through
Physical pendulum pivot angle and photoelectric sensor initial position and final position displacement difference correspondence nominal data collection are measured, to by right
Correspondence nominal data collection interpolation realizes the accurate measurement of arbitrary maximum pendulum angle；It is eliminated by nondimensionalization Impulse coupling efficiency
Physical pendulum Mass Distribution measures the error that may be introduced.The tested Impulse coupling efficiency that the present invention is applicable in can be the target of a variety of materials
The Impulse coupling efficiency being marked under laser irradiation, can also be target in magnetic force impulse action, liquid or gas jet impact, bullet
Impulse coupling efficiency under the momentary pulses force effects such as shock.
Claims (6)
1. a kind of laser acts on Impulse coupling efficiency test system to target, which is characterized in that include for placing answering for target
Pendulum device (A), the removable scale device (B) for detecting physical pendulum maximum pendulum angle, probe source (17), oscillograph (10) touch
Shine electric transducer (11), effect laser (12), the effect laser energy tune being made of half-wave plate (13) and polarizing film (14)
Unit is saved, energy meter (15) and expands focus lens group (16)；
Pendulum device (A) includes physical pendulum and physical pendulum holder (4)；Physical pendulum by two physical pendulum bridges (1), bracing member (5), be mounted on
Speculum (2), target fixing bracket (3) composition on bracing member (5)；Two physical pendulum bridges (1), bracing member (5), target
Fixing bracket (3) forms rectangular frame；Bracing member (5) is sheet metal, and lower edge is sharp edges, and bracing member (5) hangs down
It is directly mounted on the upper end of two physical pendulum bridges (1), target fixing bracket (3) is mounted on the lower end of two physical pendulum bridges (1)；Two
Physical pendulum bridge (1) is high rigidity strip flake, and thickness direction is vertical with physical pendulum swaying direction；Physical pendulum holder (4) is two
There is piece the sheet metal of sharp edges, physical pendulum to be placed on physical pendulum holder (4) by bracing member (5), the cutting edge of a knife or a sword of bracing member (5)
Sharp edge edge is in contact with the sharp edges of physical pendulum holder (4)；
Removable scale device (B) is by Gigahertz photoelectric sensor (6), one-dimensional translation stage (7), horizontal slide rail (8) and can
Scale (9) composition slided along horizontal slide rail (8)；Gigahertz photoelectric sensor (6) is fixed in one-dimensional translation stage (7), and one
It ties up translation stage (7) to be mounted on scale (9), and can be slided in vertical direction along scale (9)；Gigahertz photoelectric sensor
(6) and the photosurface normal direction of glide direction and Gigahertz photoelectric sensor (6) of the one-dimensional translation stage (7) on sliding rail (8)
It is parallel；Gigahertz photoelectric sensor (6) is connect with oscillograph (10), and oscillograph (10) connects with triggering photoelectric sensor (11)
It connects.
2. laser as described in claim 1 acts on Impulse coupling efficiency test system to target, which is characterized in that probe source
(17) after the detection light sent out is via speculum (2) reflection in pendulum device (A), removable scale device is impinged perpendicularly on
(B) on the photosurface of the Gigahertz photoelectric sensor (6) in；Half-wave plate (13), polarizing film (14) and expand condenser lens
The optical axis coincidence of group (16), and spot center of the effect laser on target is made to be overlapped with target center.
3. laser as described in claim 1 acts on Impulse coupling efficiency test system to target, which is characterized in that detect physical pendulum
When small deflection angle, position of the one-dimensional translation stage (7) on horizontal slide rail (8) is adjusted, keeps Gigahertz photoelectric sensor (6) separate
Physical pendulum；When detecting physical pendulum compared with large deflection angle, position of the one-dimensional translation stage (7) on horizontal slide rail (8) is adjusted, Gigahertz light is made
Electric transducer (6) is close to physical pendulum, by corresponding Gigahertz photoelectric sensor (6) initial position of physical pendulum maximum pendulum angle and stop bit
Displacement difference between setting narrows down within one-dimensional translation stage moving range.
4. laser as described in claim 1 acts on Impulse coupling efficiency test system to target, which is characterized in that pass through priori reality
The correspondence mark of physical pendulum pivot angle and Gigahertz photoelectric sensor (6) displacement difference between initial position and final position is determined in test
Data set is determined, by the measurement for realizing arbitrary maximum pendulum angle to the correspondence nominal data collection interpolation.
5. laser as described in claim 1 acts on Impulse coupling efficiency test system to target, which is characterized in that obtain corresponding close
The method for being nominal data collection is, using target center of screw-thread micrometer (5) alignment on target fixing bracket (3), and
So that Radiation Center of the laser on target and the alignment position of screw-thread micrometer (5) is overlapped, screw-thread micrometer at this time is read
As target initial position；So that target is moved micro-displacement s by screw-thread micrometer (5), and records Gigahertz photoelectric sensing
The final position of device (6) is demarcated to obtain correspondence between displacement s and Gigahertz photoelectric sensor (6) final position
Data set；Then pass through displacement s and Gigahertz photoelectric sensor (6) final position correspondence nominal data collection and formula s
=lsin (θ) obtains physical pendulum pivot angle θ and Gigahertz photoelectric sensor (6) final position correspondence nominal data collection.
6. laser as described in claim 1 acts on Impulse coupling efficiency test system to target, which is characterized in that according to following public affairs
Formula is obtained when ith laser single-pulse energy is EiWhen, opposite 1st laser single-pulse energy is E1When maximum thrust coupling
Coefficient Ci/C1,
Wherein, θ1Be laser single-pulse energy be E1When physical pendulum maximum pendulum angle, θiBe laser single-pulse energy be EiWhen physical pendulum
Maximum pendulum angle, C1Be 1 laser single-pulse energy it is E1When impulse coupling coefficient, CiBe i laser single-pulse energy it is EiWhen
Impulse coupling coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510638770.3A CN105352639B (en) | 2015-09-30 | 2015-09-30 | A kind of laser acts on Impulse coupling efficiency test system to target |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510638770.3A CN105352639B (en) | 2015-09-30 | 2015-09-30 | A kind of laser acts on Impulse coupling efficiency test system to target |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105352639A CN105352639A (en) | 2016-02-24 |
| CN105352639B true CN105352639B (en) | 2018-09-04 |
Family
ID=55328647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510638770.3A Active CN105352639B (en) | 2015-09-30 | 2015-09-30 | A kind of laser acts on Impulse coupling efficiency test system to target |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105352639B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN109655188B (en) * | 2019-01-14 | 2020-09-11 | 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 |
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0605369A1 (en) * | 1992-12-30 | 1994-07-06 | COMAU S.p.A. | Method and device for checking the tension of a stretched elastic element, particularly a transmission belt |
| CN103954390A (en) * | 2014-05-15 | 2014-07-30 | 黑龙江大学 | Device for adopting linear frequency modulation double beam laser heterodyne method and torsional pendulum method to measure micro impulse and measuring method thereof |
| CN104374506A (en) * | 2014-11-14 | 2015-02-25 | 西北工业大学 | Dangling type micro-impulse testing device and method |
-
2015
- 2015-09-30 CN CN201510638770.3A patent/CN105352639B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0605369A1 (en) * | 1992-12-30 | 1994-07-06 | COMAU S.p.A. | Method and device for checking the tension of a stretched elastic element, particularly a transmission belt |
| CN103954390A (en) * | 2014-05-15 | 2014-07-30 | 黑龙江大学 | Device for adopting linear frequency modulation double beam laser heterodyne method and torsional pendulum method to measure micro impulse and measuring method thereof |
| CN104374506A (en) * | 2014-11-14 | 2015-02-25 | 西北工业大学 | Dangling type micro-impulse testing device and method |
Non-Patent Citations (1)
| Title |
|---|
| 不同环境气压下激光靶冲量耦合系数的实验研究;杨波，杨雁南等;《光电子技术》;20070630(第2期);第93-96页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105352639A (en) | 2016-02-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105352639B (en) | A kind of laser acts on Impulse coupling efficiency test system to target | |
| CN103712723B (en) | The detection method of laser cavitation jet flow force percussive action and device | |
| CN107688051A (en) | A kind of measuring method of the subsurface defect width based on Laser thermo-elastic generated surface acoustic waves | |
| CN203672323U (en) | Apparatus for measuring displacement of drop hammer tester | |
| CN103697966B (en) | One is liquid surface wave height real-time measurement apparatus and measuring method a little | |
| KR20170021330A (en) | Method for determining a position of a liquid jet | |
| CN105157618A (en) | Calculated intensity correlated imaging autocollimator and measurement method | |
| CN102768184A (en) | System for Young modulus measurement of film | |
| CN103900639A (en) | High-speed multi-scale vibration and deformation detecting device and method | |
| Jensen et al. | Accelerations in water waves by extended particle image velocimetry | |
| CN106500635A (en) | Cuboid workpiece dimension measuring system based on laser-ultrasound | |
| CN102721457B (en) | Ultrasonic speckle underwater steady-state vibration measuring method | |
| CN205594083U (en) | Detect piezoceramics piezoelectric constant d31's device | |
| CN106950178B (en) | Laser impulse coupling coefficient measuring method based on flow field inversion | |
| CN104483027A (en) | Automatic laser pulse width measurement autocorrelator and measurement method | |
| CN202304771U (en) | Detector for detecting impeller positioning guide rod of through-flow fan impeller ultrasonic bonding machine | |
| CN112432766A (en) | Method for detecting performance of laser scanning galvanometer | |
| CN109696129A (en) | A kind of precise displacement sensor and its measurement method | |
| CN101799548B (en) | All-fiber velocity measurement system and phase velocity measurement method | |
| CN210570493U (en) | Laser measuring head device of measuring instrument | |
| CN102426362A (en) | Laser active detector based on micromachine MEMS (Micro Electro Mechanical System) two-dimensional scanning mirror | |
| CN210862464U (en) | Range finding removes slip table | |
| CN112432765A (en) | Laser scanning galvanometer performance detection device | |
| CN202533447U (en) | Device for measuring momentum of laser plasma | |
| CN104596635A (en) | Differential vibration acceleration sensor based on segmental PSD (Power Spectral Density) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231031 Address after: No. 578-1 Yanxin Road, Huishan Economic Development Zone, Wuxi City, Jiangsu Province, 214174 Patentee after: Wuxi Ruike Fiber Laser Technology Co.,Ltd. Address before: 210094 Xuanwu District, Jiangsu, Xiaolingwei 200, Nanjing Patentee before: NANJING University OF SCIENCE AND TECHNOLOGY |