CN108036863A - Wide-range shock velocity diagnostic device and measuring method - Google Patents
Wide-range shock velocity diagnostic device and measuring method Download PDFInfo
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- CN108036863A CN108036863A CN201711376470.8A CN201711376470A CN108036863A CN 108036863 A CN108036863 A CN 108036863A CN 201711376470 A CN201711376470 A CN 201711376470A CN 108036863 A CN108036863 A CN 108036863A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J11/00—Measuring the characteristics of individual optical pulses or of optical pulse trains
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Abstract
The invention discloses a kind of wide-range shock velocity diagnostic device and measuring method, including target practice module, spectral module, intervention module and record by imaging module, the intervention module includes at least two optical interference circuits, and the delay time of each optical interference circuit is in multiple variation relation；The target practice module focuses on incident a branch of probe laser on target surface, and a branch of probe laser with difference frequency information for being reflected back target surface introduces spectral module, the beam probe laser is divided by spectral module, and each optical interference circuit is introduced respectively, each optical interference circuit each produces beam of coherent light and is imaged and is recorded by record by imaging module.Using wide-range shock velocity diagnostic device provided by the invention and measuring method, it can meet precision needs when measuring shock waves speed and meet wide-range needs.
Description
Technical field
The invention belongs to laser interferometry techniques field, and in particular to a kind of wide-range shock velocity diagnostic device and
Measuring method.
Background technology
Shock velocity diagnoses the research for being widely used in state of matter equation, is also used for high power laser light target practice efficiency
Assessment, is to obtain the experimental method that physical parameter is important in high-energy-density physics.Velocity interferometer (VISAR)
The shock velocity measuring device of this field standard is become, VISAR uses active type measure mode, i.e., by a branch of probe light
Get on shock wave front, due to optical Doppler effect, the probe light reflected carries corrugated velocity information, information light warp
Intervention module is crossed, is divided into two beams, wherein a branch of be delayed by, be finally incident upon on streak camera and produce interference fringe, striped
The moving recording change of speed.
But in inertial confinement fusion (ICF) Targeting, the increase with laser power and the tune beam to laser,
Shock velocity will likely have very wide dynamic range in the compression experiment of same hair time, and quilt is produced or impact in impact
At the time of pursuit, the variable quantity of speed can be large enough to cause the striped of VISAR to lose.Current processing method is at same
Two optical interference circuits are equipped with VISAR, two optical interference circuits choose the etalon of two different lengths, form dual sensitivity, adopt
The method that the move of stripe of rounding several times asks for phase, it is counter to push away the striped quantity that lost.This method is in certain scope
Good effect is obtained, thus is widely used.
But when shock velocity reaches hundred km/s magnitudes, there are problem for this processing method.Because we one
As the etalon thick chosen more than several millimeters, although good tachometric survey precision can be reached, once two branch
The striped quantity that road is lost is all excessive, and the solution of integral multiple has multiple, is just not readily available correct true velocity value.The opposing party
Face, after multiple is tried to achieve, actual there was only an interference pattern for calculating shock velocity, we are to another width in this course
The utilization of the reflected velocity information of figure is simultaneously insufficient.Thus we use thinner standard when measuring the shock wave of high speed
Tool, although the measurement range of so VISAR can increase, tachometric survey precision will decline, so as to lose impact process
In detailed information.Also, the ultra-thin etalon of manufacture is extremely harsh to manufacturing technique requirent, also ten partial volume in use
It is vulnerable to the influence of stress, so as to influence Accuracy of Velocity Calculation.
The content of the invention
To solve above technical problem, the present invention provides a kind of wide-range shock velocity diagnostic device and measuring method,
It can meet precision needs when measuring shock waves speed and meet wide-range needs.
To achieve the above object, technical solution of the present invention is as follows：
A kind of wide-range shock velocity diagnostic device, including target practice module, spectral module, intervention module and record by imaging
Module, it is characterized by：The intervention module includes at least two optical interference circuits, and the delay time of each optical interference circuit is in
Multiple variation relation；The target practice module focuses on incident a branch of probe laser on target surface, and one that target surface is reflected back
The probe laser that beam has difference frequency information introduces spectral module, which is divided by spectral module, and introduces respectively each
A optical interference circuit, each optical interference circuit each produce beam of coherent light and are imaged and are recorded by record by imaging module.
Using above structure, multiple optical interference circuits have been used, so that ensure that the sufficiently large of shock velocity measurement range,
And the delay time of each optical interference circuit is in multiple variation relation, every light path is had different measurement accuracy, from only survey
Stroke wave velocity certain a part, therefore, the equipment can meet when measuring shock waves speed precision needs and
Meet wide-range needs, measurement range covers all velocity intervals that laser Doppler velocity technique can be used to measure, tool substantially
Have broad application prospects, and without frequently replacing etalon as conventional dry interferometer, then calculated, each light path point
Work is clearly and precision is intermodulated, and is conducive to the curing of interferometer from now on or industrial production streamlined, dramatically saves on and examine
Disconnected and scientific research cost.
As preferred：Each optical interference circuit is by two groups of interference beam splitter, interference reflector one and interference reflector
Into, etalon one in each optical interference circuit or is only provided with the interference reflector one, or only in the interference reflector
Etalon two is provided with two, or etalon one and mark are respectively arranged with the interference reflector one and interference reflector two
Quasi- tool two, the etalon one of each optical interference circuit and the thickness difference of etalon two are in multiple variation relation；From spectral module
The a branch of probe laser for introducing optical interference circuit is divided into two branches by interference beam splitter, and the probe laser of one of branch is through dry
Relate to speculum one and be reflected back interference beam splitter, the probe laser of another branch is reflected back interference beam splitting through interference reflector two
Two beams there is the probe laser of delay to introduce record by imaging module after closing beam formation beam of coherent light by mirror, interference beam splitter.Only
Etalon is provided with the interference reflector one for the moment, the thickness of etalon two is considered as 0, etalon one and etalon two
Thickness difference is the thickness of etalon one, only when being provided with etalon two on the interference reflector two, the thickness of etalon one
It is considered as 0, the thickness difference of etalon one and etalon two is the thickness of etalon two.Using above structure, etalon one and standard
Have the flexible of two set-up mode, can be chosen according to the actual requirements.
As preferred：The optical interference circuit shares four, two longer optical interference circuits of delay time or only dry
Relate to and etalon one is provided with speculum one, or etalon two is only provided with interference reflector two, delay time is shorter
Two optical interference circuits are respectively arranged with etalon one and etalon two on interference reflector one and interference reflector two, respectively
The etalon one of a optical interference circuit and the thickness difference of etalon two exponentially variation relation.Using above structure, we are just
Can determine hundred of shock velocity, ten, a position, tenths, the velocity amplitude of hundredths, it is adjacent in the calculating of each
It can also mutually be verified in the calculating process of digit, ensure that the computational accuracy of final speed.Also, when shock velocity exceedes
, it is necessary to consider relativistic effect during km/s magnitudes, VISAR computational methods and do not apply at this time；When speed is less than 10m/s,
Traditional photographic means can not use so high-precision equipment, so as to improve conventional efficient, reduce real with regard to energy writing speed
Test cost.
As preferred：The target practice module includes illumination camera lens, target practice beam splitter and light receiving microscopy head；A branch of probe laser according to
It is secondary to focus on target surface through illuminating camera lens, target practice beam splitter and light receiving microscopy head and be reflected back a branch of probe with difference frequency information and swash
Light, the beam probe laser introduce spectral module after light receiving microscopy head and target practice beam splitter successively.Using above structure, pass through illumination
Camera lens by light receiving microscopy head after probe laser shaping to focusing on target surface, and probe laser of the target surface reflection with difference frequency information is through receiving light
Shots, then spectral module is introduced through target practice beam splitter, can reliablely and stablely it be practiced shooting and signal collection.
As preferred：It is respectively provided between the illumination camera lens and target practice beam splitter and target practice beam splitter and light receiving microscopy head
There is target practice collimating mirror.Using above structure, collimating mirror is mainly used to adjust laser possible direction offset in paths, adds
The receipts light efficiency of strong whole system.
As preferred：Side of the target practice beam splitter away from illumination camera lens is provided with light barrier.Using above structure,
The probe laser separated by target practice beam splitter can be effectively blocked, prevents light leak.
As preferred：The spectral module includes at least one light splitting beam splitter, from a branch of the having of target practice module introducing
The probe laser of difference frequency information is by corresponding optical interference circuit after each light splitting beam splitter beam splitting.Using above structure, knot
Structure is simple and reliable, meanwhile, the light intensity into each beam probe laser of each optical interference circuit is consistent, and then ensure that shock velocity
The accuracy of measurement.
As preferred：Light splitting collimating mirror is provided between the adjacent light splitting beam splitter.Using above structure, collimating mirror master
To be used for adjusting laser possible direction offset in paths, strengthen the receipts light efficiency of whole system.
As preferred：The record by imaging module includes the record by imaging light path identical with optical interference circuit quantity, Ge Gecheng
Picture recording beam path is formed by imaging len and streak camera, and the coherent light that each beam is emitted from optical interference circuit is imaged through corresponding respectively
Lens imaging is on corresponding streak camera.It is simple and reliable for structure using above structure, it is easy to accomplish, it is able to record each interference
The stripe pattern of the coherent light of light path outgoing.
A kind of wide-range shock velocity measuring method, it is characterized by, and follows the steps below：
S1：The quantity and optical interference circuit of optical interference circuit are determined according to the requirement of shock velocity measurement range and measurement accuracy
Between delay time multiple ratio；
S2：Determine the thickness difference of each optical interference circuit Plays tool；
S3：Laser imports stable probe laser to wide-range shock velocity diagnostic device；
S4：Record by imaging module records the dynamic quantity F (t) of the interference fringe of the coherent light of each optical interference circuit outgoing；
S5：The dynamic quantity F (t) of each interference fringe recorded by record by imaging module, is calculated shock velocity
Spend u (t) hundred of km/s magnitudes, ten, a position, tenths, hundredths velocity amplitude；
S6：Each velocity amplitude is mutually verified, obtains shock velocity u (t).
Using above method, it is changed in the principle of traditional VISAR, using multiple optical interference circuits, each
The measurement accuracy of optical interference circuit is different, certain part of each bar light path measuring shock waves speed, will finally by data processing
The shock velocity result that each interference fringe is calculated is integrated so that we can when measuring shock waves speed
Meet precision needs, and can meet wide-range needs.
Compared with prior art, the beneficial effects of the invention are as follows：
, can be in measuring shock waves speed using wide-range shock velocity diagnostic device provided by the invention and measuring method
It can meet precision needs when spending and meet wide-range needs, realize that wide-range shock velocity measures, measurement range
Substantially all velocity intervals that laser Doppler velocity technique can be used to measure are covered, are had broad application prospects, and do not have to
Etalon is frequently replaced as conventional dry interferometer, is then calculated, each light path division of labor is clearly and precision is intermodulated, and has
Curing or industrial production streamlined beneficial to interferometer from now on, dramatically saves on diagnosis and scientific research cost.
Brief description of the drawings
Fig. 1 is the structure diagram of wide-range shock velocity diagnostic device.
Embodiment
The invention will be further described with attached drawing with reference to embodiments.
As shown in Figure 1, a kind of wide-range shock velocity diagnostic device, including target practice module, spectral module, intervention module
With record by imaging module, the target practice module focuses on incident a branch of probe laser on target surface 1, and target surface 1 is reflected back
A branch of probe laser with difference frequency information introduce spectral module, which is divided by spectral module, and is drawn respectively
Enter intervention module, intervention module produces multi beam coherent light and is imaged and recorded by record by imaging module.Wherein, the intervention module bag
Include at least two optical interference circuits, the delay time of each optical interference circuit is in multiple variation relation, the record by imaging module
Including the record by imaging light path identical with optical interference circuit quantity, each record by imaging light path is corresponded with each optical interference circuit.
By the design of multiple optical interference circuits, make the bigger of shock velocity precise measurement range, when the delay of each optical interference circuit
Between when being in multiple variation relation, every light path has a different measurement accuracy, i.e. every light path measuring shock waves speed certain
A part, therefore, the equipment can meet precision needs when measuring shock waves speed and meet wide-range needs.
The target practice module includes illumination camera lens 7, target practice beam splitter 5, light barrier 4, light receiving microscopy first 2 and two collimations of practicing shooting
Mirror 3.Wherein, between illumination camera lens 7 and target practice beam splitter 5, another target practice collimating mirror 3 is located at a target practice collimating mirror 3
The light barrier 4 is located at side of the target practice beam splitter 5 away from illumination camera lens 7 between target practice beam splitter 5 and light receiving microscopy head.Illumination light
The a branch of probe laser of the outgoing of fibre 8, the beam probe laser is successively through illuminating camera lens 7, target practice collimating mirror 3, target practice beam splitter 5, target practice
Focused on after collimating mirror 3 and light receiving microscopy first 2 on target surface 1, being then reflected back a branch of probe with difference frequency information from target surface 1 swashs
Light, the beam probe laser is successively through light receiving microscopy is first 2, introduces spectral module after target practice collimating mirror 3 and target practice beam splitter 5.Wherein, need
It is noted that two beams can be divided into from illumination probe laser of the camera lens 7 through 3 directive target practice beam splitter 5 of target practice collimating mirror, except through beating
3 directive light receiving microscopy first 2 of target collimating mirror it is a branch of outer, another beam is to light barrier 4；It is reflected back from target surface 1 a branch of with difference frequency letter
The probe laser of breath is through light receiving microscopy is first 2, target practice collimating mirror 3 is penetrated and beam splitting also occurs on target practice beam splitter 5, except directive spectral module
It is a branch of beyond, another beam through target practice collimating mirror 3 be emitted back towards illumination camera lens 7.
In the present embodiment, the optical interference circuit shares four, and each optical interference circuit is reflected by interference beam splitter 13, interference
Mirror 1 and interference reflector 2 15 form.Delay time it is most long and second length optical interference circuit in, only in interference reflector one
Etalon 1 is provided with 14, etalon 2 17 is not provided with interference reflector 2 15；Delay time is most short and reciprocal
In two short optical interference circuits, etalon 1 is provided with interference reflector 1, is provided with interference reflector 2 15
Etalon 2 17；Also, the etalon 1 of four optical interference circuits and the thickness difference of etalon 2 17 preferably exponentially change
Relation.Wherein, in the longest optical interference circuit of delay time, the thickness of etalon 1 is 100mm；Delay time second is grown dry
Relate in light path, the thickness of etalon 1 is 10mm；In the optical interference circuit of delay time length second from the bottom, the thickness of etalon 1
Spend for 11mm, the thickness of etalon 2 17 is 10mm；In the most short optical interference circuit of delay time, the thickness of etalon 1 is
10.1mm, the thickness of etalon 2 17 is 10mm；Above way, is because so both having made etalon 1 and etalon 2 17
Thickness difference exponentially variation relation, and make quasi- tool 1 and etalon 2 17 not to be difficult to because thickness is too small.
In above-mentioned example, when probe laser takes 532nm, etalon refractive index 1.45847, the dynamic quantity of interference fringe
F (t) is u (t)=51.6291F (t)/h with speed u (t) relations, and wherein h is the thickness difference of etalon.For etalon
When thickness difference is 0.1mm, the velocity accuracy of measurement is 25.814km/s；When thickness difference for etalon is 1mm, the speed of measurement
Degree precision is 2.581km/s；When thickness difference for etalon is 10mm, the velocity accuracy of measurement is 0.258km/s；For mark
When the thickness difference of quasi- tool is 100mm, the velocity accuracy of measurement is 0.026km/s.Above etalon 1 and etalon 2 17
Thickness difference exponentially variation relation, it is meant that we are assured that shock velocity when having above optical interference circuit at the same time
Degree hundred, ten, a position, tenths, the velocity amplitude of hundredths.In the calculating of each, in the calculating process of ortho position number
It can also mutually verify, ensure that the computational accuracy of final speed.Also, when shock velocity exceedes the magnitude of km/s, need
To consider relativistic effect, VISAR computational methods do not apply at this time；When speed is less than 10m/s, traditional photographic means is just
Energy writing speed, can not use so high-precision equipment, so as to improve conventional efficient, reduce experimental cost.Therefore, high energy
States of matter speed in metric density physics calculates usually just uses four in tens metre per second (m/s)s to hundreds of kilometer this scope per second, the above
A optical interference circuit, and the wide-range shock velocity of the thickness difference of etalon 1 and etalon 2 17 exponentially variation relation is examined
Disconnected device can be competent at any speed conditions being likely encountered in experimentation.It is pointed out that one 16 He of above etalon
The thickness difference of etalon 2 17 be intended only as one be used for describe example, can also actually take 0.2mm, 2mm, 20mm,
The similar combination such as 200mm.
A branch of probe laser that optical interference circuit is introduced from spectral module is divided into two branches by interference beam splitter 13, wherein one
The probe laser of a branch is reflected back interference beam splitter 13 through interference reflector 1, and the probe laser of another branch is through interference
Speculum 2 15 is reflected back interference beam splitter 13, and interference beam splitter 13 forms probe laser conjunction beam of two beams with delay a branch of
Corresponding record by imaging light path is introduced after coherent light.
Each record by imaging light path is formed by imaging len 11 and streak camera 12, and each beam is emitted from optical interference circuit
Coherent light be imaged on respectively through corresponding imaging len 11 on corresponding streak camera 12.Due to being usually that streak camera 12 can configure
There is CCD, so width of fringe is generally represented with the pixel number on CCD.Consider flat between interference fringe number and width of fringe
Weighing apparatus, the pixel shared by every striped is designed as about 40 by us.If according to 1/20 striped precision meter of the current international practice
Calculation, that is, the amount of movement of 2 pixels can be reflected in follow-up Data processing, then the fringe constant of different-thickness
1/20, should be just friction speed grade rate accuracy.
The spectral module includes three light splitting beam splitters 9, a branch of spy with difference frequency information introduced from target practice module
Pin laser is divided into two by a light splitting beam splitter 9, wherein a branch of probe laser is through the second point of 6 directive of light splitting collimating mirror
Light beam splitter 9, another beam probe laser is through the 3rd light splitting beam splitter 9 of another light splitting collimating mirror 6 directive, second and the 3rd
The respective probe laser of directive is divided into two by a light splitting beam splitter 9 again respectively, ultimately forms four identical beams of light intensity with poor
The probe laser of frequency information, this four beams probe laser are each injected in an optical interference circuit.Also, the spectral module further includes
Several dichroic reflectors 10, these dichroic reflectors 10 are used for the direction of propagation for changing probe laser.
A kind of wide-range shock velocity measuring method, follows the steps below：
S1：The quantity and optical interference circuit of optical interference circuit are determined according to the requirement of shock velocity measurement range and measurement accuracy
Between delay time multiple ratio；
S2：Determine the thickness difference of each optical interference circuit Plays tool 1 and etalon 2 17；
S3：Laser imports stable probe laser to wide-range shock velocity diagnostic device；
S4：Record by imaging module records the dynamic quantity F (t) of the interference fringe of the coherent light of each optical interference circuit outgoing；
S5：The dynamic quantity F (t) of each interference fringe recorded by record by imaging module, is calculated shock velocity
Spend u (t) hundred of km/s magnitudes, ten, a position, tenths, hundredths velocity amplitude；
S6：Each velocity amplitude is mutually verified, obtains shock velocity u (t).Wherein, practice shooting after starting, in step S4, four
Platform streak camera 12 gathers the dynamic fringe completed in setting time.
Finally it should be noted that foregoing description is only the preferred embodiment of the present invention, the ordinary skill people of this area
Member on the premise of without prejudice to present inventive concept and claim, can make table as multiple types under the enlightenment of the present invention
Show, such conversion is each fallen within protection scope of the present invention.
Claims (10)
1. a kind of wide-range shock velocity diagnostic device, including target practice module, spectral module, intervention module and record by imaging mould
Block, it is characterised in that：The intervention module includes at least two optical interference circuits, and the delay time of each optical interference circuit is in again
Number variation relation；
The target practice module focuses on incident a branch of probe laser on target surface (1), and a branch of tool that target surface (1) is reflected back
The probe laser for having difference frequency information introduces spectral module, which is divided by spectral module, and introduces respectively each dry
Light path is related to, each optical interference circuit each produces beam of coherent light and is imaged and recorded by record by imaging module.
2. wide-range shock velocity diagnostic device according to claim 1, it is characterised in that：Each optical interference circuit
Formed by interference beam splitter (13), interference reflector one (14) and interference reflector two (15), in each optical interference circuit or only
It is provided with etalon one (16) on the interference reflector one (14), or be only provided with the interference reflector two (15)
Etalon two (17), or it is respectively arranged with etalon one on the interference reflector one (14) and interference reflector two (15)
(16) and etalon two (17), the etalon one (16) of each optical interference circuit and the thickness difference of etalon two (17) are in multiple
Variation relation；
A branch of probe laser that optical interference circuit is introduced from spectral module is divided into two branches by interference beam splitter (13), one of them
The probe laser of branch is reflected back interference beam splitter (13) through interference reflector one (14), and the probe laser of another branch is through dry
Relate to speculum two (15) and be reflected back interference beam splitter (13), the probe laser that two beams have delay is closed beam by interference beam splitter (13)
Record by imaging module is introduced after forming beam of coherent light.
3. wide-range shock velocity diagnostic device according to claim 2, it is characterised in that：The optical interference circuit shares
Four, two longer optical interference circuits of delay time or etalon one is only provided with interference reflector one (14)
(16), etalon two (17), two shorter interference lights of delay time or are only provided with interference reflector two (15)
Road is respectively arranged with etalon one (16) and etalon two (17) on interference reflector one (14) and interference reflector two (15),
The etalon one (16) of each optical interference circuit and the thickness difference of etalon two (17) exponentially variation relation.
4. according to wide-range shock velocity diagnostic device according to any one of claims 1 to 3, it is characterised in that：It is described
Target practice module includes illumination camera lens (7), target practice beam splitter (5) and light receiving microscopy head (2)；A branch of probe laser is successively through illuminating camera lens
(7), target practice beam splitter (5) and light receiving microscopy head (2) focus on target surface (1) and are reflected back a branch of probe with difference frequency information and swash
Light, the beam probe laser introduce spectral module after light receiving microscopy head (2) and target practice beam splitter (5) successively.
5. wide-range shock velocity diagnostic device according to claim 4, it is characterised in that：In the illumination camera lens
(7) target practice collimating mirror (3) is both provided between target practice beam splitter (5) and target practice beam splitter (5) and light receiving microscopy head (2).
6. wide-range shock velocity diagnostic device according to claim 4, it is characterised in that：In the target practice beam splitter
(5) side away from illumination camera lens (7) is provided with light barrier (4).
7. according to wide-range shock velocity diagnostic device according to any one of claims 1 to 3, it is characterised in that：It is described
Spectral module includes at least one light splitting beam splitter (9), a branch of probe laser with difference frequency information introduced from target practice module
By in corresponding optical interference circuit after each light splitting beam splitter (9) beam splitting.
8. wide-range shock velocity diagnostic device according to claim 7, it is characterised in that：The adjacent light splitting beam splitting
Light splitting collimating mirror (6) is provided between mirror (9).
9. according to wide-range shock velocity diagnostic device according to any one of claims 1 to 3, it is characterised in that：It is described
Record by imaging module includes the record by imaging light path identical with optical interference circuit quantity, and each record by imaging light path is by imaging len
(11) it is imaged on respectively through corresponding imaging len (11) with streak camera (12) composition, the coherent light that each beam is emitted from optical interference circuit
On corresponding streak camera (12).
10. a kind of wide-range shock velocity measuring method, it is characterised in that follow the steps below：
S1：Determined according to the requirement of shock velocity measurement range and measurement accuracy between the quantity of optical interference circuit and optical interference circuit
Delay time multiple ratio；
S2：Determine the thickness difference of each optical interference circuit Plays tool；
S3：Laser imports stable probe laser to wide-range shock velocity diagnostic device；
S4：Record by imaging module records the dynamic quantity F (t) of the interference fringe of the coherent light of each optical interference circuit outgoing；
S5：The dynamic quantity F (t) of each interference fringe recorded by record by imaging module, is calculated shock velocity u
(t) hundred in km/s magnitudes, ten, a position, tenths, the velocity amplitude of hundredths；
S6：Each velocity amplitude is mutually verified, obtains shock velocity u (t).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711376470.8A CN108036863B (en) | 2017-12-19 | 2017-12-19 | Wide-range shock wave speed diagnosis device and measurement method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711376470.8A CN108036863B (en) | 2017-12-19 | 2017-12-19 | Wide-range shock wave speed diagnosis device and measurement method |
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| Publication Number | Publication Date |
|---|---|
| CN108036863A true CN108036863A (en) | 2018-05-15 |
| CN108036863B CN108036863B (en) | 2023-08-25 |
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