CN108534616A - A kind of experimental rig for the high axial load factor test of energetic material - Google Patents
A kind of experimental rig for the high axial load factor test of energetic material Download PDFInfo
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- CN108534616A CN108534616A CN201810137282.8A CN201810137282A CN108534616A CN 108534616 A CN108534616 A CN 108534616A CN 201810137282 A CN201810137282 A CN 201810137282A CN 108534616 A CN108534616 A CN 108534616A
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- powder charge
- load factor
- axial load
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B35/00—Testing or checking of ammunition
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A kind of experimental rig for the high axial load factor test of energetic material disclosed by the invention is related to, for the experimental rig of the high axial load factor test of energetic material, belonging to energetic material Experimental Mechanics field.The present invention includes front shell cover and medicine shell two parts.Medicine shell is mainly made of data-storage system installation space, connection screw thread, displacement sensor mounting groove, full-scale powder charge installation space, foil gauge mounting groove and cabling channel.The technical problem to be solved in the present invention is：A kind of experimental rig for penetrating the mechanical response DATA REASONING under high overload environment in big gun for the full-scale powder charge of energetic material is provided, it can realize the mechanical response DATA REASONING penetrated in big gun for the full-scale powder charge of energetic material under high overload environment, have the advantages that save experimentation cost and time.The high axial load factor is 6000g~12000g, by using highly resistance g sensor, adjusts transducer range, and higher overload level can further be adapted to by increasing data-storage system buffering.
Description
Technical field
The present invention relates to a kind of experiment of machanics experimental rigs, and in particular to for the high axial load factor test of energetic material
Experimental rig belongs to energetic material Experimental Mechanics field.
Background technology
When gun launched missile emits initial stage or Qinzhou harbor penetration ground, energetic material can withstand up to g up to ten thousand, and (gravity accelerates
Degree) axial load factor, safety issue may be caused.Both at home and abroad generally use universal testing machine, hydraulic servo testing machine,
The thermodynamic characteristics of the equipment research energetic material small size sample such as split hopkinson press bar, drop weight test device, and adopt
The real response of full-scale powder charge is predicted with simulation means, but is lacked experiment of the full-scale powder charge under real load and compared
And verification, and mechanical response data of the full-scale powder charge under high axial load factor be only it is most genuine and believable, therefore, it is necessary to needle
Carry out the high axial load factor testing experiment for simulating true application environment to energetic material.
The prior art includes the test bullet of test system using the transmitting of the equipment such as light-gas gun, rocket sled, cannon, and reproduction big gun is penetrated
High overload environment.But the mechanical response data penetrated under high overload environment in big gun for the full-scale powder charge of energetic material there is no to survey at present
The experimental rig of amount.
Invention content
A kind of experimental rig technical problems to be solved for the high axial load factor test of energetic material disclosed by the invention
It is to provide a kind of experiment dress for penetrating the mechanical response DATA REASONING under high overload environment in big gun for the full-scale powder charge of energetic material
It sets, can realize the mechanical response DATA REASONING penetrated in big gun for the full-scale powder charge of energetic material under high overload environment, there is section
The advantages of saving experimentation cost and time.
Purpose of the present invention is to what is solved by following technical proposals.
A kind of experimental rig for the high axial load factor test of energetic material disclosed by the invention, including front shell cover and medicine shell
Two parts.Medicine shell is mainly pacified by data-storage system installation space, connection screw thread, displacement sensor mounting groove, full-scale powder charge
Fill space, foil gauge mounting groove and cabling channel composition.
The full-scale powder charge installation space is medicine shell back cylindrical cavity, outer diameter and length dimension for ensureing
Space needed for full-scale powder charge installation；The full-scale powder charge installation space outer diameter is for ensureing full-scale powder charge in height
When generating compressive deformation under axial load factor, powder charge outer surface is in contact with peripheral wall surface.
The high axial load factor is preferably 6000g~12000g, by using highly resistance g sensor, adjusts sensor
Range, higher overload level can further be adapted to by increasing data-storage system buffering.
The data-storage system installation space is the cylindrical cavity that medicine shell front is attached to screens block.Subsidiary screens block
For limiting rotary freedom of the data-storage system around the longitudinal axis, prevent the angular velocity of rotation in test bullet transmitting from data being caused to be deposited
Opposite turn pair between storage system and medicine shell, and then prevent from relatively rotating and pull apart cable.The data-storage system installation space week
Cable hole is provided on wall face, cable hole is used to the cable in experimental rig outside wall surface cabling channel introducing data-storage system peace
Fill space；The nose threads of the data-storage system installation space peripheral wall surface are connect with front shell cover, for storing data
System is enclosed within the data-storage system installation space.
Screens block is preferably two pieces in the data-storage system installation space.
The foil gauge mounting groove is located at medicine shell external rear face, is distributed along medicine shell y direction；Foil gauge mounting groove is used
In installation foil gauge, realized to the DATA REASONING at full-scale powder column and medicine shell inner surface difference contact point by foil gauge；It answers
Thin-wall case need to be processed as by becoming shell at piece mounting groove.The thin-wall case under conditions of meeting structural strength, be as thin as by
Full-scale powder charge generates the deformation that can be measured by foil gauge after being squeezed, and then realizes and measure full-scale powder charge by foil gauge
Deformation.
Institute's displacement sensors mounting groove, which is used to install, measures end face displacement of the full-scale powder charge under high axial load factor
Displacement sensor.Institute's displacement sensors displacement measurement zero is parallel with full-scale powder charge end face initial position, when full-scale dress
When medicine bears the generation of high axial load factor and is compressed axially, displacement sensor is used to measure the axial displacement course of grainend.
The preferred optical displacement sensor of the displacement sensor measures full-scale powder charge for ease of optical displacement sensor
End face displacement is provided with the light source incidence hole tested for optical displacement sensor and light receiver device mounting groove, light in medicine shell
Source entrance aperture is opened at full-scale powder charge installation space and full-scale powder charge contact face.Light source is mounted on the light source incidence
It simultaneously realizes to the sealing of medicine shell in hole.The light receiver device mounting groove axis and light source incidence hole central symmetry, light receiver dress
It sets mounted on the light receiver device mounting groove and realizes to the sealing of medicine shell.The length of light receiver device in an axial direction according to
Required displacement range determines.
The cabling channel is located at medicine shell outer surface.The cabling channel is step type, and step type is designed for avoiding cable from existing
It is torn under high axial load factor；It is rounded structure at the cabling channel dog-ear, the rounded structure is for preventing plowing from cable.
The cabling channel is symmetrical on medicine shell outer surface, avoids medicine shell deviation of gravity center axis as possible.Cable glue is enclosed in cabling channel.
Connection screw thread on the medicine shell with improved standard shell case for connecting to form test bullet, therefore, the present invention
It is disclosed a kind of easy for installation for the experimental rig of the high axial load factor test of energetic material and improved standard shell case, and nothing
New shell case need to be re-worked, and then realizes and saves experimentation cost and time.
A kind of experimental rig working method for the high axial load factor test of energetic material disclosed by the invention is as follows：Experiment
In, the experimental rig connect to form test bullet by connection screw thread with improved standard shell case.When Canon launching, bullet is tested
By high axial load factor in thorax.Full-scale powder charge generates under the effect of high axial load factor and is compressed axially and is radially expanded deformation,
Full-scale powder charge appearance surface expansion squeezes medicine shell, and thin-wall case deformation at foil gauge mounting groove on medicine shell is measured by foil gauge,
Realize that measuring full-scale powder charge by foil gauge deforms.Simultaneous displacement sensor measures the axial position of full-scale powder charge front end face
It moves, the data measured are by the cable incoming data storage system in cabling channel, after off-test recovery test device, before opening
Shell cover takes out data-storage system and extracts data, that is, realizes the high axial load factor test to the full-scale powder charge of energetic material.
Advantageous effect：
1, a kind of experimental rig being used for the high axial load factor test of energetic material of the invention, provides a kind of for the material containing energy
Expect that the experimental rig of the mechanical response DATA REASONING under high overload environment is penetrated in full-scale powder charge in big gun, can realize for the material containing energy
Expect the mechanical response DATA REASONING that full-scale powder charge is penetrated in big gun under high overload environment.
2, a kind of experimental rig for the high axial load factor test of energetic material of the invention, passes through medicine shell outer surface cabling
It is empty that glue envelope and data-storage system of the stepped design, cable of slot in cabling channel are enclosed within the data-storage system installation
Between, realize overload-resistant design, it is ensured that the reliability of data test.
3, a kind of experimental rig for the high axial load factor test of energetic material of the invention, test bullet is in thorax by height
Axial load factor, full-scale powder charge generates under the effect of high axial load factor and is compressed axially and is radially expanded deformation, outside full-scale powder charge
Superficial expansion squeezes medicine shell, and measuring thin-wall case deformation at foil gauge mounting groove, realization on medicine shell by foil gauge passes through strain
Piece measures the deformation under the conditions of the high axial load factor of full-scale powder charge.
4, a kind of experimental rig for the high axial load factor test of energetic material of the invention, the connection spiral shell on the shell
Line with improved standard shell case for connecting to form test bullet, therefore, experimental rig and improved standard shell case installation side
Just, it and without re-working new shell case, and then realizes and saves experimentation cost and time.
5, a kind of experimental rig for the high axial load factor test of energetic material of the invention, the displacement sensor are excellent
Optical displacement sensor is selected, compared to other displacement sensors, has the advantages that small, fast, easy for installation, the Ke Yiqian of response
It is used as medicine in shell, while uses optical measurement scheme, does not influence measurand and parameter.
Description of the drawings
Fig. 1 is a kind of experimental rig sectional view for the high axial load factor test of energetic material of the present invention；
Fig. 2 is a kind of schematic three dimensional views of experimental rig for the high axial load factor test of energetic material of the present invention.
Wherein：1-front shell cover；2-medicine shells；2.1-data-storage system installation spaces；2.2-connection screw threads；2.3—
Displacement sensor mounting groove；2.4-full-scale powder charge installation spaces；2.5-foil gauge mounting grooves；2.6-cabling channels.
Specific implementation mode
The present invention will be further described below with reference to the drawings.
Embodiment 1
A kind of experimental rig for the high axial load factor test of energetic material disclosed in the present embodiment, such as Fig. 1 and Fig. 2 institutes
Show, includes mainly front shell cover 1 and medicine shell 2.Medicine shell 2 is mainly comprising data-storage system installation space 2.1, connection screw thread 2.2, position
Displacement sensor mounting groove 2.3, full-scale powder charge installation space 2.4, foil gauge mounting groove 2.5 and cabling channel 2.6.1 He of front shell cover
Medicine shell 2 is connected through a screw thread, and data-storage system is enclosed in data-storage system installation space 2.1；Experimental rig passes through
Connection screw thread 2.2 connect to form test bullet with improved standard shell case；The full-scale powder charge of energetic material is positioned over full-scale dress
In medicine installation space 2.4；Displacement sensor mounting groove 2.3 and foil gauge mounting groove 2.5 install respectively optical displacement sensor and
Foil gauge；Optical displacement sensor and foil gauge cable are connected into data-storage system installation space by stepped cabling channel 2.6
It is connect with data-storage system in 2.1.
The full-scale powder charge installation space 2.4 is 2 back cylindrical cavity of medicine shell, full-scale powder charge installation space 2.4
Outer diameter and length dimension are used to ensure the space needed for full-scale powder charge installation；The full-scale powder charge installation space 2.4
Outer diameter is for when ensureing that full-scale powder charge generates compressive deformation under high axial load factor, powder charge outer surface to be sent out with peripheral wall surface
Raw contact.
The data-storage system installation space 2.1 is the cylindrical cavity that 2 front of medicine shell is attached to two pieces of screens blocks.It is subsidiary
Two pieces of screens blocks for limiting rotary freedom of the data-storage system around the longitudinal axis, prevent the rotation angle speed in test bullet transmitting
Degree causes opposite turn pair between data-storage system and medicine shell, and then prevents from relatively rotating and pull apart cable.Data storage system
Cable hole is provided in system 2.1 peripheral wall surface of installation space, cable hole is used for the cable in experimental rig outside wall surface cabling channel 2.6
Introduce data-storage system installation space 2.1；The nose threads of 2.1 peripheral wall surface of data-storage system installation space are with before
Shell cover 1 connects, for data-storage system to be enclosed within the data-storage system installation space 2.1.
The foil gauge mounting groove 2.5 is located at 2 external rear face of medicine shell, and six foil gauge mounting grooves are along 2 longitudinal axis side of medicine shell
To distribution；Foil gauge mounting groove 2.5 is realized by foil gauge to full-scale powder column and 2 inner surface of medicine shell for installing foil gauge
DATA REASONING at different contact points；Shell is processed as the thin-wall case of thickness 2mm at foil gauge mounting groove 2.5.The 2mm
Thick and thin wall shell can be generated under conditions of meeting structural strength, after being squeezed by full-scale powder charge and can be measured by foil gauge
Deformation, and then realize that measuring full-scale powder charge by foil gauge deforms.
Institute's displacement sensors mounting groove 2.3 is used to install the end face displacement for measuring full-scale powder charge under high axial load factor
Optical displacement sensor.The optical displacement sensor displacement measurement zero is parallel with full-scale powder charge end face initial position,
When high axial load factor generation is born in full-scale powder charge to be compressed axially, displacement sensor is used to measure the axial displacement of grainend
Course.
The displacement of full-scale powder charge end face is measured for ease of optical displacement sensor, is provided in medicine shell 2 and is passed for optical displacement
The light source incidence hole and light receiver device mounting groove, light source incidence hole of sensor test are opened in full-scale powder charge installation space 2.1
At full-scale powder charge contact face.Light source is mounted on the light source incidence hole and realizes and sealed to medicine shell 2.The light connects
Receiving apparatus mounting groove axis and light source incidence hole central symmetry, light receiver device are mounted on the light receiver device and install
Slot is simultaneously realized to the sealing of medicine shell 2.The length of light receiver device in an axial direction is determined according to required displacement range.
The cabling channel 2.6 is located at 2 outer surface of medicine shell.The cabling channel 2.6 is step type, and step type is designed for avoiding
Cable is torn under high axial load factor；It is rounded structure at 2.6 dog-ear of the cabling channel, the rounded structure is for avoiding
Scratch cable.The cabling channel 2.6 is symmetrical on 2 outer surface of medicine shell, avoids 2 deviation of gravity center axis of medicine shell as possible.Cable
Glue is enclosed in cabling channel 2.6.
A kind of working method of experimental rig for the high axial load factor test of energetic material disclosed in the present embodiment is as follows：
In experiment, the experimental rig connect to form test bullet by connection screw thread with improved standard shell case.When Canon launching, survey
Bullet is tried in thorax by high axial load factor.Full-scale powder charge generates under the effect of high axial load factor and is compressed axially and is radially expanded change
Shape, full-scale powder charge appearance surface expansion squeeze medicine shell 2, and thin wall at foil gauge mounting groove 2.5 is measured on medicine shell 2 by foil gauge
Body deforms, and realizes that measuring full-scale powder charge by foil gauge deforms.Simultaneous displacement sensor measures full-scale powder charge front end face
Axial displacement, the data measured pass through the cable incoming data storage system in cabling channel 2.6, off-test recovery test device
Afterwards, front shell cover 1 is opened, data-storage system is taken out and extracts data, that is, is realized axial to the height of the full-scale powder charge of energetic material
Overload measurement.
It is described above that rope technical problems to be solved, technical solution and advantage of the present invention have been carried out furtherly
It is bright, it should be understood that above is only a specific embodiment of the present invention, for explaining the present invention, being not used to limit this
The protection domain of invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all
It is included within protection scope of the present invention.
Claims (7)
1. a kind of experimental rig for the high axial load factor test of energetic material, it is characterised in that：Including front shell cover (1) and medicine shell
(2) two parts；Medicine shell (2) is mainly installed by data-storage system installation space (2.1), connection screw thread (2.2), displacement sensor
Slot (2.3), full-scale powder charge installation space (2.4), foil gauge mounting groove (2.5) and cabling channel (2.6) composition；
The full-scale powder charge installation space (2.4) is medicine shell (2) back cylindrical cavity, and outer diameter and length dimension are used for
Ensure the space needed for full-scale powder charge installation；Full-scale powder charge installation space (2.4) outer diameter is for ensureing full ruler
When very little powder charge generates compressive deformation under high axial load factor, powder charge outer surface is in contact with peripheral wall surface；
The data-storage system installation space (2.1) is the cylindrical cavity that medicine shell (2) front is attached to screens block；Subsidiary card
Position block prevents the angular velocity of rotation in test bullet transmitting from causing to count for limiting rotary freedom of the data-storage system around the longitudinal axis
According to opposite turn pair between storage system and medicine shell, and then prevents from relatively rotating and pull apart cable；The data-storage system installation is empty
Between cable hole is provided in (2.1) peripheral wall surface, cable hole is used to introduce the cable in experimental rig outside wall surface cabling channel (2.6)
Data-storage system installation space (2.1)；The nose threads of data-storage system installation space (2.1) peripheral wall surface are with before
Shell cover (1) connects, for data-storage system to be enclosed within the data-storage system installation space (2.1)；
The foil gauge mounting groove (2.5) is located at medicine shell (2) external rear face, is distributed along medicine shell (2) y direction；Foil gauge is pacified
Tankage (2.5) is realized by foil gauge at full-scale powder column and medicine shell (2) inner surface difference contact point for installing foil gauge
DATA REASONING；Shell need to be processed as thin-wall case at foil gauge mounting groove (2.5)；The thin-wall case is to meet structure strong
Under conditions of degree, being as thin as generating after being squeezed by full-scale powder charge can be deformed by foil gauge measurement, and then be realized by answering
Become piece and measures full-scale powder charge deformation；
Institute's displacement sensors mounting groove (2.3), which is used to install, measures end face displacement of the full-scale powder charge under high axial load factor
Displacement sensor；Institute's displacement sensors displacement measurement zero is parallel with full-scale powder charge end face initial position, when full-scale dress
When medicine bears the generation of high axial load factor and is compressed axially, displacement sensor is used to measure the axial displacement course of grainend.
2. a kind of experimental rig for the high axial load factor test of energetic material as described in claim 1, it is characterised in that：Institute
It states cabling channel (2.6) and is located at medicine shell (2) outer surface；The cabling channel (2.6) is step type, and step type is designed for avoiding cable
It is torn under high axial load factor；It is rounded structure at cabling channel (2.6) dog-ear, the rounded structure is drawn for avoiding
Hinder cable；The cabling channel (2.6) is symmetrical on medicine shell (2) outer surface, avoids medicine shell (2) deviation of gravity center axis as possible；
Cable glue is enclosed in cabling channel (2.6).
3. a kind of experimental rig for the high axial load factor test of energetic material as claimed in claim 2, it is characterised in that：Institute
The displacement sensor stated is optical displacement sensor, and the displacement of full-scale powder charge end face is measured for ease of optical displacement sensor,
Medicine shell (2) is provided with the light source incidence hole tested for optical displacement sensor and light receiver device mounting groove, light source incidence hole
It is opened at full-scale powder charge installation space (2.1) and full-scale powder charge contact face；Light source is mounted on the light source incidence hole
And it realizes and medicine shell (2) is sealed；The light receiver device mounting groove axis and light source incidence hole central symmetry, light receiver dress
It sets mounted on the light receiver device mounting groove and realizes to medicine shell (2) sealing；The length of light receiver device in an axial direction
It is determined according to required displacement range.
4. a kind of experimental rig for the high axial load factor test of energetic material as claimed in claim 3, it is characterised in that：Institute
The high axial load factor stated is 6000g~12000g, by using highly resistance g sensor, adjusts transducer range, increases data
Storage system buffering can further adapt to higher overload level.
5. a kind of experimental rig for the high axial load factor test of energetic material as claimed in claim 4, it is characterised in that：Institute
The connection screw thread (2.2) on medicine shell (2) is stated for connecting to form test bullet with improved standard shell case.
6. a kind of experimental rig for the high axial load factor test of energetic material as claimed in claim 5, it is characterised in that：Institute
It is two pieces to state the interior screens block of data-storage system installation space (2.1).
7. a kind of experimental rig for the high axial load factor test of energetic material as described in claim 1,2,3,4,5 or 6,
It is characterized in that：Working method is as follows, and in experiment, the experimental rig connect shape by connection screw thread with improved standard shell case
At test bullet；When Canon launching, test bullet is in thorax by high axial load factor；Full-scale powder charge is produced under the effect of high axial load factor
Raw to be compressed axially and be radially expanded deformation, full-scale powder charge appearance surface expansion squeezes medicine shell (2), medicine shell is measured by foil gauge
(2) thin-wall case deforms at foil gauge mounting groove (2.5) on, realizes that measuring full-scale powder charge by foil gauge deforms；Position simultaneously
Displacement sensor measures the axial displacement of full-scale powder charge front end face, and the data measured are incoming by the cable in cabling channel (2.6)
Data-storage system after off-test recovery test device, opens front shell cover (1), takes out data-storage system and simultaneously extracts data,
Realize the high axial load factor test to the full-scale powder charge of energetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810137282.8A CN108534616A (en) | 2018-02-10 | 2018-02-10 | A kind of experimental rig for the high axial load factor test of energetic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810137282.8A CN108534616A (en) | 2018-02-10 | 2018-02-10 | A kind of experimental rig for the high axial load factor test of energetic material |
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| Publication Number | Publication Date |
|---|---|
| CN108534616A true CN108534616A (en) | 2018-09-14 |
Family
ID=63485785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810137282.8A Pending CN108534616A (en) | 2018-02-10 | 2018-02-10 | A kind of experimental rig for the high axial load factor test of energetic material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081783A (en) * | 2019-01-29 | 2019-08-02 | 北京理工大学 | The low damage big gun of one kind penetrates expeimental cartridge and its recovery method |
| CN111795619A (en) * | 2020-07-15 | 2020-10-20 | 南京理工大学 | Gun shooting test bomb with reverse buffer and test device thereof |
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| US9335230B1 (en) * | 2014-04-17 | 2016-05-10 | The United States Of American As Represented By The Secretary Of The Army | Pressure sensing method and apparatus for gun-launched projectile |
| CN105841559A (en) * | 2016-05-30 | 2016-08-10 | 中国工程物理研究院电子工程研究所 | Novel air cannon equivalent loading test device |
| CN106197175A (en) * | 2016-08-03 | 2016-12-07 | 中北大学 | Propellant charge strain and displacement integrated measurer under high overload |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102192690A (en) * | 2011-04-23 | 2011-09-21 | 中北大学 | Overload test and detection device of gas gun |
| US9335230B1 (en) * | 2014-04-17 | 2016-05-10 | The United States Of American As Represented By The Secretary Of The Army | Pressure sensing method and apparatus for gun-launched projectile |
| CN104535439A (en) * | 2015-01-09 | 2015-04-22 | 西安近代化学研究所 | Double-pulse-load loading test device |
| CN105841559A (en) * | 2016-05-30 | 2016-08-10 | 中国工程物理研究院电子工程研究所 | Novel air cannon equivalent loading test device |
| CN106197175A (en) * | 2016-08-03 | 2016-12-07 | 中北大学 | Propellant charge strain and displacement integrated measurer under high overload |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081783A (en) * | 2019-01-29 | 2019-08-02 | 北京理工大学 | The low damage big gun of one kind penetrates expeimental cartridge and its recovery method |
| CN110081783B (en) * | 2019-01-29 | 2020-11-10 | 北京理工大学 | Low-damage shot-peening test bomb and recovery method thereof |
| CN111795619A (en) * | 2020-07-15 | 2020-10-20 | 南京理工大学 | Gun shooting test bomb with reverse buffer and test device thereof |
| CN111795619B (en) * | 2020-07-15 | 2023-08-04 | 南京理工大学 | Shot testing bullet with reverse buffering function and testing device thereof |
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Application publication date: 20180914 |