CN206330991U - A kind of velocity measuring device of sub-calibre bullet - Google Patents
A kind of velocity measuring device of sub-calibre bullet Download PDFInfo
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- CN206330991U CN206330991U CN201621305045.0U CN201621305045U CN206330991U CN 206330991 U CN206330991 U CN 206330991U CN 201621305045 U CN201621305045 U CN 201621305045U CN 206330991 U CN206330991 U CN 206330991U
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- bullet
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- measuring device
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Abstract
The utility model discloses a kind of velocity measuring device of sub-calibre bullet, including target cabin, the two ends in target cabin are separately installed with drive end bearing bracket and rear end cap, separation of the projectile seat device is installed on drive end bearing bracket, cylinder is cased with outside separation of the projectile seat device, cylinder is connected with zigzag mounting bracket, two matrix bearings are sequentially installed with zigzag mounting bracket, sheet metal is fixed with matrix bearing, on the top of sheet metal inserted with plastic sheet, foil gauge is installed in the root of sheet metal, foil gauge is connected with high dynamic strain indicator, after-poppet is installed in target cabin, target plate is installed on after-poppet.The utility model nuzzles up plastic sheet to drive sheet metal bending by bullet, the foil gauge being attached on sheet metal is while produce signal transmission to high dynamic strain indicator, calculate the difference of two foil gauge response times, so as to calculate the speed of bullet, the device is outdoor indoors and different illumination conditions under can accurately complete test, device is ingenious, and measurement is accurate.
Description
Technical field
The present invention relates to the velocity measuring device of sub-calibre bullet, belong to bullet and test the speed field.
Background technology
Gas big gun is the one kind for directly using the gas under compressive state to promote bullet to accelerate in bore as former driving force
Equipment, is mainly used in the research in terms of material fundamental characteristics and explosion physics.Bullet support, is the development production with ammunition technology
Raw, in order to improve the armor-penetrating ability of bullet, typically launch Small cartridge, i.e. calibre projectiles using large caliber gun, but to make
Calibre projectiles are adapted to heavy caliber light-gas gun to use bullet support.Bullet support belongs to " passiveness " quality of bullet, so bullet support quality will
It is as light as possible, while when bullet flies away from bore, it is desirable to which bullet support can be separated promptly with bullet, reach interference of the bullet support to bullet
To minimum, a kind of separation of the projectile seat device is at this moment needed.After bullet leaves separation of the projectile seat device, the initial velocity of bullet has necessarily
Loss, but to research bullet for different structure destructive power, how it is effectively measuring go out bullet leave separation of the projectile seat dress
The initial velocity postponed is also extremely crucial.
At present, although existing pneumatic separation bullet support can save attachment device to separation of the projectile seat, and the outer bullet of bullet can be improved
Path needed for road performance but separation is longer (more than 10 meters), is not suitable for small-sized target cabin.It is general that small-sized target cabin carries out separation of the projectile seat
Using separation is forced, most common bullet support and separation of the projectile seat device are cylindrical bullet support and orifice type separation of the projectile seat device.Cylinder
Shape bullet support and orifice type separator are although simple in construction, it is easy to process, but have two shortcomings：1. quality shared by bullet support is relatively
Greatly, can reduce bullet goes out thorax speed；2. bullet support can change original path after being contacted with separation of the projectile seat device, exist certain
It is dangerous.And the bellmouth blocking apparatus that China Engineering Physics Research Institute uses can influence the stabilization of bullet trajectory to a certain extent
Property.
Current bullet speed measuring device mainly has a light veil type speed measuring device, infrared speed measuring device, high-speed camera measurement and
Silk screen such as tests the speed at the method.Light veil type speed measuring device and the common shortcoming of infrared speed measuring device are that precision is not high enough, are surveyed for testing
Measure error larger.Requirement of the light veil type speed measuring device to light source is quite harsh, can only be when outdoor weather is sunny or interior does not have
Having measured under the light source of flicker, if carrying out the measurement of bullet velocity in target cabin, it would be desirable to its other light filling, institute for
Narrow confined space measurement, the device is relative complex and reliability is relatively low.Infrared speed measuring device is higher to environmental requirement, test wrapper
The particulate matter such as broken small scraps of paper all can produce influence to test result in border.High-speed camera mensuration is relatively accurate, but to shooting
Environmental requirement is higher, and excessively dark environment can influence to shoot, from cost consideration, put into also larger.Silk screen velocimetry is required for every time
The silk screen interrupted is changed, relative cost is higher and changes cumbersome.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention provides a kind of speed of sub-calibre bullet
Measurement apparatus, nuzzles up plastic sheet to drive sheet metal bending, the foil gauge being attached on sheet metal is while produce letter by bullet
The difference that two foil gauge response times are calculated to high dynamic strain indicator number is transmitted, so as to calculate the speed of bullet, device is skilful
Wonderful, measurement is accurate.
Technical scheme：In order to solve the above technical problems, a kind of velocity measuring device of sub-calibre bullet of the present invention, including
Target cabin, the two ends in target cabin are separately installed with drive end bearing bracket and rear end cap, and separation of the projectile seat device, separation of the projectile seat are provided with drive end bearing bracket
Cylinder is cased with outside device, cylinder is connected with zigzag mounting bracket, two matrix bearings are sequentially installed with zigzag mounting bracket,
Sheet metal is fixed with matrix bearing, on the top of sheet metal inserted with plastic sheet, foil gauge is installed in the root of sheet metal,
Foil gauge is connected with high dynamic strain indicator, is provided with target cabin on after-poppet, after-poppet and is provided with target plate；The separation of the projectile seat
Bullet support is installed on device, protective case is covered with separation of the projectile seat device, protective case one end is enclosed within gun tube.Bullet is in bullet support
Coordinate for gap, gap value ensures in the range of 0-0.02mm.So that bullet departs from separation of the projectile seat device after complete stability.
Preferably, being provided with through hole in the separation of the projectile seat device, the through hole includes three sections, and first paragraph is conical opening, in
Between section be correction section, the inlet diameter of interlude is 1.5~1.6 times of bullet diameters, and the outlet diameter of interlude is more straight than bullet
Big 0.1~the 0.2mm in footpath, the 3rd section is cylindrical section.
Preferably, 3~4 times, the 3rd section of the length that the correction section is bullet length be 5 times of bullet length and with
On.
Preferably, being provided with spring washer between the cylinder and separation of the projectile seat device.
Preferably, the sheet metal is copper sheet or aluminium flake.
Preferably, the spacing of two sheet metals is 10 ± 1cm.
Preferably, the front end of the bullet support, which is provided with blind hole, blind hole, is clamped with bullet, the rear end of bullet support is provided with circle
Post groove, bullet support largest outside diameter value 0.1~0.2mm smaller than gun tube internal diameter.
Beneficial effect：The velocity measuring device of the sub-calibre bullet of the present invention, nuzzles up plastic sheet to drive by bullet
Sheet metal bending, the foil gauge being attached on sheet metal are while produce signal transmission to high dynamic strain indicator, two foil gauges of calculating
The difference of response time, so as to calculate the speed of bullet, the device is indoors under outdoor and light different illumination conditions
Complete to test with accurate, device is ingenious, and measurement is accurate.
Brief description of the drawings
Bullet will enter the schematic diagram of separation of the projectile seat device with bullet support in Fig. 1 present invention.
Bullet and schematic diagram after separation of the projectile seat in Fig. 2 present invention.
The bullet support schematic diagram of Fig. 3 present invention.
The separation of the projectile seat schematic device of Fig. 4 present invention.
Fig. 5 is cylindrical structure figure.
Fig. 6 is the structure chart of matrix bearing.
Embodiment
As shown in Figures 1 to 6, a kind of velocity measuring device of sub-calibre bullet of the invention, including target cabin 8, target cabin 8
Two ends are separately installed with drive end bearing bracket and rear end cap, and separation of the projectile seat device 5 is provided with by screw 7 on drive end bearing bracket, in order to reduce
Stress concentration and vibration, pad the chip shield 6 of last layer annular, generally rubber blanket between separation of the projectile seat device 5 and target cabin 8
Circle, thickness is cased with cylinder 9 outside 1mm or so, separation of the projectile seat device 5, and bullet is provided between the cylinder 9 and separation of the projectile seat device 5
Spring packing ring 10, cylinder 9 is fixed with zigzag mounting bracket 12 by screw 11, be sequentially installed with zigzag mounting bracket 12 two it is recessed
Type bearing 17, matrix bearing 17 is fixed by screw 15, and sheet metal 14 is fixed with matrix bearing 17, and sheet metal 14 passes through spiral shell
Nail 18 is fixed, and the spacing of two sheet metals 14 is 10 ± 1cm, and sheet metal 14 is copper sheet or aluminium flake, on the top of sheet metal 14
Inserted with plastic sheet 13, foil gauge 16 is installed in the root of sheet metal 14, foil gauge 16 is connected with high dynamic strain indicator 19,
It is provided with target cabin 8 on after-poppet 21, after-poppet 21 and target plate 24 is installed, is fixed on target plate 24 using nut 22 and screw 23
On after-poppet 21；Bullet support 3 is installed on the separation of the projectile seat device 5, protective case 2, protective case are covered with separation of the projectile seat device 5
2 one end are enclosed within gun tube 1, and protective case 2 is a kind of taper sheath core structure, when not in use, can be drawn in, convenient storage；
When deployed, protective case 2 is successively slided into basic laminating gun tube 1 (3~4mm or so length), this can at utmost reduce
Separation of the projectile seat device 5 is arranged on the danger of the outside of target cabin 8.
In the present invention, the structure of bullet support 3 is as shown in figure 3, to reduce the mass of bullet support 3, typically using lightweight materials such as nylon
Material makes, because the flight attitude of bullet support 3 also has an impact to bullet 4, so bullet support 3 needs to ensure certain draw ratio, at this moment
Both draw ratio was ensured by the following method while or the weight of mitigation bullet support 3：One is that the head of sharpening bullet support 3 (makes the shape on the head of bullet support 3
The shape shape anterior with separation of the projectile seat device 5 is basically identical)；Two be the back space for successively hollowing out bullet support 3, it is ensured that bullet support 3 is still
Ensure the intensity of itself with certain wall thickness, the diameter of the outside maximum of bullet support 3 is typically using smaller than the diameter of gun tube 1
0.1mm~0.2mm size.Make needed for being accelerated to bullet 4 and bullet support 3 by gun tube 1 together using compressed gas during transmitting
Speed takes off thorax, and separation of the projectile seat device 5 is run into after bullet 4 and one segment distance of flight of bullet support 3 after de- thorax.The separation of the projectile seat
Through hole is provided with device 5, the through hole includes three sections, and first paragraph is conical opening, and anterior opening is larger, and bullet 4 and bullet support 3 are embedded in
In the first paragraph, interlude is correction section, and the inlet diameter of interlude is 1.5~1.6 times of the diameter of bullet 4, corrects Duan Weizi
3~4 times of the length of bullet 4, the outlet diameter of interlude is than the big 0.1~0.2mm of diameter of bullet 4, and purpose make it that bullet 4 is departing from bullet
The center in target plate 24 when being contacted with target plate 24 is ensure that after support 3, the 3rd section is cylindrical section, and the 3rd section of length is
4~5 times of the length of bullet 4, in order to reduce vibration of the bullet 4 in separation of the projectile seat device 5.The separation of the projectile seat device 5 is solved
Target cabin 8 is smaller (to be arranged on outside target cabin 8) the problem of can not install, while parts are convenient for changing, if protective case has damage
Protective case only need to be changed.
The cylinder 9 that one bottom is polished was enclosed within the rear portion of separation of the projectile seat device 5 by the present invention before this, and in cylinder 9 and bullet support
Upper spring washer 10 is padded between separator 5.One zigzag mounting bracket 12 is fixed on cylinder 9 using screw 11.In zigzag
Two matrix bearings 17 are installed on mounting bracket 12, by taking matrix bearing 17 above as an example, first consolidated matrix bearing 17 with screw 15
It is scheduled on zigzag mounting bracket 12, selects in softer sheet metal 14 (can be copper sheet and aluminium flake etc.) insertion matrix bearing 17, make
It is tightly fixed with screw 18, then softer plastic sheet 13 (typically with the plastic sheet 13 of softer relatively thin material, can be used
PVC plastic) insert in the groove opened on the thickness direction of sheet metal 14, stick foil gauge 16, (concrete structure in the root of sheet metal 14
As shown in Figure 6) and connect the circuit of foil gauge 16 (the highest sample frequency of deformeter is 10MHz, can to high dynamic strain indicator 19
The high dynamic strain indicator 19 moved using Yangzhou section).
When installing zigzag mounting bracket 12, it need to ensure that the bottom center of the structure puts down with the center line of separation of the projectile seat device 5
OK, two pieces of sheet metals 14 close to plastic sheet 13 need to ensure and plane perpendicular.Adjust sheet metal 14 and the overall height of plastic sheet 13
Degree, makes bullet 4 at the edge (general warranty is in 1mm or so) through the plastic sheet 13 that can nuzzle up after separation of the projectile seat device 5, metal
Piece 14 produces bending therewith, and the foil gauge 16 being attached on sheet metal 14 is while produce signal transmission to high dynamic strain indicator 19.Son
Bullet 4 is likely to result in damage when nuzzling up plastic sheet 13, and plug-type plastic sheet 13 is convenient for changing, and is changed after breakage.
In the present invention, the distance between two pieces of plastic sheets 13 are measured as L, can be adjusted according to space size in target cabin 8
Whole (10cm can be set to), by high dynamic strain indicator 19 can obtain former and later two foil gauges 16 time response difference be Δ t, then I
Can obtain bullet 4 velocity amplitude be V=L/ Δ t, (theoretical velocity measurement range is in 0-10km/s).
The above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (7)
1. a kind of velocity measuring device of sub-calibre bullet, it is characterised in that：Including target cabin, before the two ends in target cabin are separately installed with
End cap and rear end cap, are provided with outside separation of the projectile seat device, separation of the projectile seat device on drive end bearing bracket and are cased with cylinder, cylinder and zigzag
Mounting bracket is connected, and two matrix bearings are sequentially installed with zigzag mounting bracket, sheet metal is fixed with matrix bearing,
The top of sheet metal is provided with foil gauge inserted with plastic sheet in the root of sheet metal, and foil gauge is connected with high dynamic strain indicator,
It is provided with target cabin on after-poppet, after-poppet and target plate is installed；Bullet support is installed on the separation of the projectile seat device, in bullet support point
Protective case is covered with from device, protective case one end is enclosed within gun tube.
2. the velocity measuring device of sub-calibre bullet according to claim 1, it is characterised in that：The separation of the projectile seat device
Interior to be provided with through hole, the through hole includes three sections, and first paragraph is conical opening, and interlude is correction section, and the inlet diameter of interlude is son
1.5~1.6 times of bullet diameter, the outlet diameter 0.1~0.2mm bigger than bullet diameters of interlude, the 3rd section is cylindrical section.
3. the velocity measuring device of sub-calibre bullet according to claim 2, it is characterised in that：The correction section is bullet
3~4 times of length, the 3rd section of length for 5 times of bullet length and more than.
4. the velocity measuring device of sub-calibre bullet according to claim 1, it is characterised in that：The cylinder and bullet support point
From between device be provided with spring washer.
5. the velocity measuring device of sub-calibre bullet according to claim 1, it is characterised in that：The sheet metal is red copper
Piece or aluminium flake.
6. the velocity measuring device of sub-calibre bullet according to claim 1, it is characterised in that：The spacing of two sheet metals
For 10 ± 1cm.
7. the velocity measuring device of sub-calibre bullet according to claim 1, it is characterised in that：The front end of the bullet support is set
Have and bullet is clamped with blind hole, blind hole, the rear end of bullet support is provided with cylindrical groove, and bullet support largest outside diameter value is smaller than gun tube internal diameter
0.1~0.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621305045.0U CN206330991U (en) | 2016-11-30 | 2016-11-30 | A kind of velocity measuring device of sub-calibre bullet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621305045.0U CN206330991U (en) | 2016-11-30 | 2016-11-30 | A kind of velocity measuring device of sub-calibre bullet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206330991U true CN206330991U (en) | 2017-07-14 |
Family
ID=59288221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621305045.0U Withdrawn - After Issue CN206330991U (en) | 2016-11-30 | 2016-11-30 | A kind of velocity measuring device of sub-calibre bullet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206330991U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526221A (en) * | 2016-11-30 | 2017-03-22 | 江苏科技大学 | Device for measuring speed of subcaliber bullet |
| CN114184096A (en) * | 2021-04-28 | 2022-03-15 | 北京理工大学 | Test device and method for testing fragment speed attenuation rule in complex environment |
| CN114486596A (en) * | 2022-01-13 | 2022-05-13 | 中国科学院力学研究所 | Electromagnetic drive-based multidirectional high-speed small particle emitting device |
-
2016
- 2016-11-30 CN CN201621305045.0U patent/CN206330991U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526221A (en) * | 2016-11-30 | 2017-03-22 | 江苏科技大学 | Device for measuring speed of subcaliber bullet |
| CN106526221B (en) * | 2016-11-30 | 2022-09-23 | 江苏科技大学 | Speed measuring device for sub-caliber bullets |
| CN114184096A (en) * | 2021-04-28 | 2022-03-15 | 北京理工大学 | Test device and method for testing fragment speed attenuation rule in complex environment |
| CN114486596A (en) * | 2022-01-13 | 2022-05-13 | 中国科学院力学研究所 | Electromagnetic drive-based multidirectional high-speed small particle emitting device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170714 Effective date of abandoning: 20220923 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20170714 Effective date of abandoning: 20220923 |