CN104501669A - Turbine safety fuse air-blowing and detonation integrated device - Google Patents
Turbine safety fuse air-blowing and detonation integrated device Download PDFInfo
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- CN104501669A CN104501669A CN201410828975.3A CN201410828975A CN104501669A CN 104501669 A CN104501669 A CN 104501669A CN 201410828975 A CN201410828975 A CN 201410828975A CN 104501669 A CN104501669 A CN 104501669A
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Abstract
The invention relates to a turbine safety fuse air-blowing and detonation integrated device belonging to the technical field of a fuse performance testing device. The invention particularly relates to the turbine safety fuse air-blowing and detonation integrated device comprising a power source mechanism and a testing main body mechanism. The turbine safety fuse air-blowing and detonation integrated device is characterized by comprising the power source mechanism and the testing main body mechanism, wherein the power source mechanism comprises an air pipe, a movable air blowing pipe which is connected with the air pipe through a connection assembly, and an upper air cylinder for providing power to the movable air blowing pipe. The testing main body mechanism comprises an explosion-proof barrel and an upper end cover which is adaptive to the explosion-proof barrel and can be opened and closed; a smoke discharging opening is formed in the side wall of the explosion-proof barrel; a fuse clamping device is arranged in the explosion-proof barrel; and a fuse triggering device is arranged on the upper end cover in a penetrating manner. The turbine safety fuse air-blowing and detonation integrated device has dual functions of air blowing and safety removal, and striking and detonation; and the tested fuse turbine safety is relieved by air blowing and a fuse is detonated by adopting a striking manner.
Description
Technical field
The present invention relates to fuse performance testing device technical field, the blowing be specially for the performance test of turbine safety fuze is detonated integrated device.
Background technology
Fuse controls by perception target information or by predetermined condition the system that ammunition explosive train explodes in good time, and in simple terms, fuse controls the device that bullet detonates under relative to target optimum conditions.Fuse can be divided into different types by different action principles.The present invention has been mainly used to the test of the turbine insurance institution contact fuze being used in mortar projectile.Such fuse adopts the two environmental forces redundancy Double-insurance structures be made up of recoil drag and turbine insurance institution, and during dependence percussion target, fuse firing pin percussion detonator makes fuse effect.
At present, when carrying out the test of turbine insurance institution fuze tests room, main employing blowing device produces the air-flow of certain wind speed and makes action of high-speed airflow on the turbine of fuse, air force suffered when tested fuse flies is simulated with this, make fuse turbine rotation is moved, thus remove turbine insurance institution to the locking of rotor.And then by fuse percussion lock impact fuse, active force during simulation fuse percussion target, makes firing pin percussion detonator, thus makes fuze action.Blowing of the prior art and detonate by two independently device complete respectively, function is relatively single.In process of the test, need the fuse completing blowing test to move on to priming device from blowing device, due to now fuse arming, be in and treat cock, mobile fuse may cause its accidental action.Therefore, adopt existing equipment to carry out fuse blowing, test of detonating, operating process is complicated also has certain danger.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind ofly both to have been possessed blowing unlocking function and also possesses the detonate blowing of function of impact and to detonate integrated device.
The present invention adopts following technical scheme:
A kind of turbine safety fuze blowing is detonated integrated device, and its key technology is: it comprises power source mechanism and test subject mechanism
Described power source mechanism comprises airduct, the movable blower be connected by coupling assembling with described airduct, and provides the upper cylinder of power for described movable blower.
Described test subject mechanism comprises explosion-proof vent and the suitable and upper end cover to be opened/closed with described explosion-proof vent, and described explosion-proof vent sidewall is provided with exhaust opening, is provided with fuse clamping device in described explosion-proof vent, described upper end cover runs through being provided with fuse percussion lock;
Described fuse clamping device comprises the gripper shoe be fixedly arranged in described explosion-proof vent and the fuse grip sleeve be arranged in described gripper shoe, described fuse grip sleeve is arranged at the below of described fuse percussion lock, and described movable blower is arranged at above described fuse percussion lock.
Further improve as the present invention, described fuse percussion lock is made up of trigger shaft and the back-moving spring being placed on described trigger shaft periphery.
Further improve as the present invention, described coupling assembling comprises transfer tube and stay pipe, described transfer tube one end is socketed with described airduct and is connected, and the other end of described transfer tube is socketed with stay pipe and is connected, and it is inner that described movable blower activity is embedded at described stay pipe.
Further improve as the present invention, described stay pipe sidewall runs through be provided with contact with described movable blower tighten lock bolt, the airduct arranged outside socket-connected with described transfer tube has clip.
Further improve as the present invention, described test subject mechanism also comprises being arranged at and connects bits device in described explosion-proof vent, described in connect bits device and comprise material receiver.
Further improve as the present invention, described test subject mechanism also comprises the fume extractor be connected with described exhaust opening, and described fume extractor comprises the smoke exhaust pipe be connected with described exhaust opening and the smoke ejector be connected with the described smoke exhaust pipe other end.
Further improve as the present invention, described fuse grip sleeve comprises outer tube and inner sleeve, and described outer tube and described gripper shoe are fixedly installed, and described inner sleeve movable sleeve is placed in described outer tube inside and runs through by described gripper shoe.
Further improve as the present invention, be fixedly installed lower cylinder in described explosion-proof vent, described inner sleeve is connected with the piston rod of lower cylinder by connecting rod, described outer tube sidewall is provided with the slotted eye moved up and down for holding connecting rod.
Further improve as the present invention, the described bits device that connects also comprises the protective plate being arranged at described material receiver inside, described connect bits device also comprise be arranged at described material receiver bottom pull and push plate, described material receiver is fixedly connected with the described plate that pulls and pushes, describedly pull and push plate and described explosion-proof vent removably connects, described explosion-proof vent offers the opening for pulling and pushing plate described in picking and placeing, described opening part is provided with buckle closure.
Further improve as the present invention, described power source mechanism is connected by support with described test subject mechanism, one end of described support is fixedly connected with described explosion-proof vent, the other end of described support is connected with described stay pipe, the end cap side of described upper cylinder is fixedly installed on described support, and described upper cylinder piston rod side is connected with described movable blower by connecting rod.
In the present invention:
Described explosion-proof vent can be connected by connector with described upper end cover.Described connector is selected from but non-limiting for support bar or rotating shaft, and what this connector played act as links together upper end cover and explosion-proof vent, and when opening upper end cover, upper end cover can be taken down, and is directly transferred to outside explosion-proof vent.Thus, this connector is extended for and reaches frame for movement upper end cover being connected effect with explosion-proof vent mechanical field is all.
Described explosion-proof vent and described upper end cover are fixed by tight lock set.Described tight lock set is selected from but the non-limiting bolt for mutual adaptation and threaded components, cam-type latch assembly, contact roller assembly, snap close and lock set.Acting as when carrying out detonating test of this tight lock set, locks upper end cover and explosion-proof vent, in order to avoid chip flies out or blown by upper end cover.Thus, this tight lock set is extended for and can reaches the frame for movement of upper end cover and explosion-proof vent tightly being locked effect mechanical field is all.
Described fuse percussion lock is selected from and is not defined as preferred trigger shaft and offsetting spring structure in the application, and acting as of this device moves down impact contact fuze under the effect of power source, and can reset after impact.Therefore this fuse percussion lock is extended for and impacts and the frame for movement resetted all can the reaching of mechanical field.
For convenience of the unlatching of upper end cover, handle can be set up on upper end cover.
Airduct of the present invention is operationally connected with high-pressure air source.
Good effect of the present invention is as follows:
The present invention adopts the aerodynamic environment of the tested fuse of blowing-out gas flow field simulation when ballistic flight, removes turbine insurance institution to the locking of rotor, thus the insurance of the second of demilitarize.Now, tested fuse is in arm-to-arm, and the mode finally adopting same source of the gas to impact fuse firing pin parts simulates impact during tested fuse trigger target, and percussion firer element detonator makes fuse effect.Whole blowing is separated and is protected and impact the process of detonating and all carry out in same cartridge type explosion-proof vent, be in after the main insurance of turbine is removed fuse pending without the need to manually loading and unloading, the duties process such as carrying, can complete fuze action tests, and process of the test is safe and reliable.This apparatus design has drawing and pulling type to connect bits device and exhaust opening, collects the chip of explosion time generation and the flue gas of quick emptying explosion time generation.This apparatus structure is simple, and test operation is easy.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present invention;
Accompanying drawing 2 is sectional structure schematic diagram of the present invention;
Accompanying drawing 3 is using state schematic diagram of the present invention.
In the accompanying drawings: 11 airducts, 12 movable blowers, 13 upper cylinders, 14 transfer tubes, 15 stay pipes, 16 tighten lock bolt, 17 clips, 18 supports, 21 explosion-proof vents, 22 upper end covers, 23 exhaust openings, 24 trigger shafts, 25 back-moving springs, 26 smoke ejectors, 27 buckle closures, 28 support bars, 29 handles, 31 gripper shoes, 32 outer tubes, 33 inner sleeves, 34 connecting rods, 35 lower cylinders, 36 slotted eyes, 41 material receivers, 42 protective plates, 43 pull and push plate, 100 fuses.
Detailed description of the invention
Below in conjunction with accompanying drawing 1-3 and detailed description of the invention, the present invention is described in further detail.
As shown in figure 1 and 2, the blowing of a kind of turbine safety fuze is detonated integrated device, and it comprises power source mechanism and test subject mechanism; Described power source mechanism comprises airduct 11, the movable blower 12 be connected by coupling assembling with described airduct 11, and provides the upper cylinder 13 of power for described movable blower 12; Described coupling assembling comprises transfer tube 14 and stay pipe 15, and described transfer tube 14 one end is socketed with described airduct 12 and is connected, and the other end of described transfer tube 14 is socketed with stay pipe 15 and is connected, and it is inner that the activity of described movable blower 12 is embedded at described stay pipe 15.Make it drop in order to avoid gases at high pressure impact movable blower 12, described stay pipe 15 sidewall runs through being provided with tightening of contacting with described movable blower 12 and locking bolt 16; Airduct 11 arranged outside socket-connected at described transfer tube 14 has clip 17.
Described test subject mechanism comprises explosion-proof vent 21 and the suitable and upper end cover 22 to be opened/closed with described explosion-proof vent 21, described explosion-proof vent 21 sidewall is provided with exhaust opening 23, be provided with fuse clamping device in described explosion-proof vent 21, described upper end cover 22 run through being provided with fuse percussion lock, described fuse clamping device comprises the gripper shoe 31 be fixedly arranged in described explosion-proof vent 21 and the fuse grip sleeve be arranged in described gripper shoe 31, described grip sleeve comprises outer tube 32 and inner sleeve 33, described outer tube 32 is fixedly installed with described gripper shoe 31, described inner sleeve 33 movable sleeve is placed in described outer tube 32 inside and runs through by described gripper shoe 31, described gripper shoe 31 is provided with lower cylinder 35, described inner sleeve 33 is connected with the piston rod of lower cylinder 35 by connecting rod 34, described outer tube 32 sidewall is provided with the slotted eye 36 moved up and down for holding connecting rod 34.Fuse percussion lock comprises trigger shaft 24 and forms with the back-moving spring 25 being placed on described trigger shaft 24 periphery, and trigger shaft 24 is by the through hole of back-moving spring 25 inlay card on upper end cover 22.
The described power source mechanism of the present embodiment is connected by support 18 with described main body mechanism, one end of described support 18 is fixedly connected with described explosion-proof vent 21, the other end of described support 18 is connected with described stay pipe 15, the end cap side of described upper cylinder 13 is fixedly installed on described support 18, and described upper cylinder 13 piston rod side is connected with described movable blower 12 by connecting rod.Make apparatus of the present invention form an entirety, decrease space occupancy rate, and convenient mobile and fixing whole device.
In order to stop the effusion of the jet that explosion time produces and chip in the present embodiment, be provided with in described explosion-proof vent 21 and connect bits device, the described bits device that connects comprises material receiver 41, the protective plate 42 of described material receiver 41 inside, described material receiver 41 bottom is provided with and pulls and pushes plate 43, described material receiver 41 is fixedly connected with the described plate 43 that pulls and pushes, and is provided with angle bar bottom described explosion-proof vent 21, described in pull and push that plate 43 is movable to be inserted in the gap that angle bar and explosion-proof vent 21 formed.Described explosion-proof vent 21 offers the opening for pulling and pushing plate 43 described in picking and placeing, described opening part is provided with buckle closure 27.
In order to the flue gas that quick emptying explosion time produces in the present embodiment, be provided with the fume extractor be connected with described exhaust opening 23, comprise the smoke exhaust pipe be connected with described exhaust opening 23 and the smoke ejector 26 be connected with the described smoke exhaust pipe other end.
Can be connected to after opening to make upper end cover 22 on explosion-proof vent 21, the explosion-proof vent 21 of the present embodiment is connected by rotating shaft with described upper end cover 22, opening upper end cover 22 by the mode rotated, support bar 28 being set on explosion-proof vent 21, for supporting the upper end cover 22 of Unscrew simultaneously.The conveniently opening and closing of upper end cover, are provided with the convenient handle 29 opened on upper end cover 22 top.
When detonating, the upper end cover 22 in the present embodiment and explosion-proof vent 21 are fixed together by cam-type latch assembly.
As shown in Figure 3, in use, airduct 11 is connected with high-pressure air source, fuse 100 is plugged in inner sleeve 33, in order to better fixed fuse 100, inner sleeve 33 is provided with fastening bolt, with fastening bolt locking fuse 100, avoid fuse 100 to loosen.By the piston rod outputting power of lower cylinder 35, drive inner sleeve 33 rise or drop to correct position, then move to correct position by upper cylinder 13 drive activity blower 12, unblock is blown to the fuse fixed.After blowing unlocks, close upper end cover 22, by cam-type latch assembly, upper end cover 22 and explosion-proof vent 21 are fixed together.Again by the position of upper cylinder 13 adjustment activity blower 12, impact trigger shaft 24, trigger shaft 24 moves down, and impact fuse while compression reseting spring 25, after impact, trigger shaft 24 resets under the effect of back-moving spring 25.The protective plate 42 of changeable type is in order to keep out the jet of explosion time generation.The chip that material receiver 41 produces in order to collect explosion time, pulls and pushes plate 43 and is used for taking out or putting back to material receiver.Fume extractor is used for the flue gas that quick emptying explosion time produces.
Turbine safety fuze provided by the present invention blowing detonate integrated device overall structure cylindrically.Airduct is connected with air accumulator, for blowing priming device provides source of the gas.Blower is for generation of the air-flow of certain wind speed.By the position of the motor adjustment blower of upper cylinder, make blower and tested fusehead close, ensure that the airflow function of certain wind speed is on the turbine of fuse.After turbine insurance releasing process completes, closed upper end cover is also locked, and impacts tested fuse trigger mechanism by the reciprocating motion of pressure automatic spacing cylinder, and during simulation actual shooting, the triggering environmental forces of fuse percussion target detonates tested fuse.Explosion-proof vent is a cylindrical shape, with a upper end cover, by cam type fastener, upper end cover is firmly locked.Tested fuse is arranged in the inner sleeve of explosion-proof vent, and inner sleeve can be controlled to move up and down by lower cylinder, regulates the position of tested fuse.In addition, the jet that the protective plate that this covering device is also designed with changeable type produces in order to keep out explosion time, is designed with material receiver, draft fan in order to the chip collecting explosion time and produce and the flue gas that produces of emptying explosion time fast.
The present invention adopts high velocity air to simulate the tested fuse aerodynamic environment that fuse stands when ballistic flight, removes turbine insurance institution to the locking of rotor, thus the main insurance of demilitarize.Now, tested fuse is in arm-to-arm, and the mode finally adopting same source of the gas to impact fuse firing pin parts simulates environmental forces during tested fuse trigger target, and percussion firer element detonator makes fuse effect.The process that whole blowing is detonated all is carried out in same cartridge type explosion-proof vent, be in after the main insurance of turbine is removed fuse pending without the need to manually loading and unloading, the human contact such as carrying moves, can complete fuze action test overall process, experimental safe is reliable.This apparatus design has drawing and pulling type to connect bits device, smoke exhaust mechanism.This apparatus structure is simple, and test operation is easy.
On the basis of the present embodiment, can set up two travel switches for limiting and control the position of inner sleeve and movable blower respectively, whole action can be automatically control, and can install human-computer interface control engineering additional, by computer-controlled program, handled easily and control.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in previous embodiment, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of embodiment of the present invention technical scheme.
Claims (10)
1. the blowing of turbine safety fuze is detonated an integrated device, it is characterized in that: it comprises power source mechanism and test subject mechanism;
Described power source mechanism comprises airduct (11), the movable blower (12) be connected by coupling assembling with described airduct (11), and the upper cylinder (13) being described movable blower (12) provides power;
Described test subject mechanism comprises explosion-proof vent (21) and the suitable and upper end cover to be opened/closed (22) with described explosion-proof vent (21), described explosion-proof vent (21) sidewall is provided with exhaust opening (23), described explosion-proof vent is provided with fuse clamping device in (21), described upper end cover (22) runs through being provided with fuse percussion lock;
Described fuse clamping device comprises the gripper shoe (31) be fixedly arranged in described explosion-proof vent (21) and the fuse grip sleeve be arranged in described gripper shoe (31), described fuse grip sleeve is arranged at the below of described fuse percussion lock, and described movable blower (12) is arranged at above described fuse percussion lock.
2. one blowing according to claim 1 is detonated integrated device, it is characterized in that: described fuse percussion lock is made up of trigger shaft (24) and the back-moving spring (25) that is placed on described trigger shaft (24) periphery.
3. a kind of turbine safety fuze blowing according to claim 1 is detonated integrated device, it is characterized in that: described coupling assembling comprises transfer tube (14) and stay pipe (15), described transfer tube (14) one end is socketed with described airduct (12) and is connected, the other end of described transfer tube (14) is socketed with stay pipe (15) and is connected, and it is inner that the activity of described movable blower (12) is embedded at described stay pipe (15).
4. a kind of turbine safety fuze blowing according to claim 3 is detonated integrated device, it is characterized in that: described stay pipe (15) sidewall runs through being provided with tightening of contacting with described movable blower (12) and locking bolt (16), airduct (11) arranged outside socket-connected with described transfer tube (14) has clip (17).
5. a kind of turbine safety fuze blowing according to claim 1 is detonated integrated device, it is characterized in that: described test subject mechanism also comprises being arranged at and connects bits device in described explosion-proof vent (21), described in connect bits device and comprise material receiver (41).
6. a kind of turbine safety fuze blowing according to claim 5 is detonated integrated device, it is characterized in that: described in connect bits device and also comprise and be arranged at the inner protective plate (42) of described material receiver (41), described connect bits device also comprise be arranged at described material receiver (41) bottom pull and push plate (43), described material receiver (41) is fixedly connected with the described plate (43) that pulls and pushes, the described plate (43) that pulls and pushes removably connects with described explosion-proof vent, described explosion-proof vent (21) offers the opening for pulling and pushing plate described in picking and placeing, described opening part is provided with buckle closure (27).
7. a kind of turbine safety fuze blowing according to claim 1 is detonated integrated device, it is characterized in that: described test subject mechanism also comprises the fume extractor be connected with described exhaust opening (23), described fume extractor comprises the smoke exhaust pipe be connected with described exhaust opening (23) and the smoke ejector (26) be connected with the described smoke exhaust pipe other end.
8. a kind of turbine safety fuze blowing according to claim 1 is detonated integrated device, it is characterized in that: described fuse grip sleeve comprises outer tube (32) and inner sleeve (33), described outer tube (32) and described gripper shoe (31) are fixedly installed, and described inner sleeve (31) movable sleeve is placed in described outer tube (32) inside and runs through by described gripper shoe (31).
9. a kind of turbine safety fuze blowing according to claim 8 is detonated integrated device, it is characterized in that: explosion-proof vent (21) internal fixtion is provided with lower cylinder (35), described inner sleeve (31) is connected by the piston rod of connecting rod (34) with lower cylinder (35), described outer tube (32) sidewall is provided with the slotted eye (36) moved up and down for holding connecting rod (34).
10. a kind of turbine safety fuze blowing according to claim 1 is detonated integrated device, it is characterized in that: described power source mechanism is connected by support (18) with described main body mechanism for testing, one end of described support (18) is fixedly connected with described explosion-proof vent (21), the other end of described support (18) is connected with described stay pipe (15), the end cap side of described upper cylinder (13) is fixedly installed on described support (18), described upper cylinder (13) piston rod side is connected with described movable blower (12) by connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410828975.3A CN104501669B (en) | 2014-12-26 | 2014-12-26 | A kind of turbine safety fuze blowing is detonated integrated device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410828975.3A CN104501669B (en) | 2014-12-26 | 2014-12-26 | A kind of turbine safety fuze blowing is detonated integrated device |
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| Publication Number | Publication Date |
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| CN104501669A true CN104501669A (en) | 2015-04-08 |
| CN104501669B CN104501669B (en) | 2016-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410828975.3A Expired - Fee Related CN104501669B (en) | 2014-12-26 | 2014-12-26 | A kind of turbine safety fuze blowing is detonated integrated device |
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| CN (1) | CN104501669B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108398062A (en) * | 2018-03-21 | 2018-08-14 | 中国工程物理研究院电子工程研究所 | Detachable protecting against shock fuse |
| CN109405674A (en) * | 2018-11-15 | 2019-03-01 | 北京理工大学 | A kind of small-bore guided munition environmental simulation test test macro and its test method |
| CN110879025A (en) * | 2019-12-10 | 2020-03-13 | 湖南红日工业有限公司 | Low-voltage time measurement box accurate time measurement mechanism, low-voltage time measurement box and time measurement method |
| CN111947525A (en) * | 2020-08-10 | 2020-11-17 | 湖南兵器建华精密仪器有限公司 | Static time measuring instrument and testing method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2697344A (en) * | 1954-05-05 | 1954-12-21 | Eugene M Mcnatt | Testing apparatus for fuze timing devices |
| US3329014A (en) * | 1965-03-03 | 1967-07-04 | Walter N Stewart | Drop and spin test apparatus |
| CN100442004C (en) * | 2005-07-01 | 2008-12-10 | 中国人民解放军总装备部军械技术研究所 | Detector for light fuse sensitivity and igniting property |
| CN201392155Y (en) * | 2008-09-24 | 2010-01-27 | 李国林 | Fuze testing explosion-proof tank |
| CN202994005U (en) * | 2012-12-17 | 2013-06-12 | 中国人民解放军63981部队 | Laboratory destroying device for fuse initiating explosive device |
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2014
- 2014-12-26 CN CN201410828975.3A patent/CN104501669B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108398062A (en) * | 2018-03-21 | 2018-08-14 | 中国工程物理研究院电子工程研究所 | Detachable protecting against shock fuse |
| CN109405674A (en) * | 2018-11-15 | 2019-03-01 | 北京理工大学 | A kind of small-bore guided munition environmental simulation test test macro and its test method |
| CN109405674B (en) * | 2018-11-15 | 2020-06-02 | 北京理工大学 | Small-caliber guided ammunition environment simulation test system and test method thereof |
| CN110879025A (en) * | 2019-12-10 | 2020-03-13 | 湖南红日工业有限公司 | Low-voltage time measurement box accurate time measurement mechanism, low-voltage time measurement box and time measurement method |
| CN110879025B (en) * | 2019-12-10 | 2022-03-22 | 湖南红日工业有限公司 | Low-voltage time measurement box accurate time measurement mechanism, low-voltage time measurement box and time measurement method |
| CN111947525A (en) * | 2020-08-10 | 2020-11-17 | 湖南兵器建华精密仪器有限公司 | Static time measuring instrument and testing method thereof |
| CN111947525B (en) * | 2020-08-10 | 2022-11-29 | 湖南兵器建华精密仪器有限公司 | Static time measuring instrument and testing method thereof |
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| CN104501669B (en) | 2016-01-27 |
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