CN209342740U - Air bubble bullet muzzle velocity test macro - Google Patents
Air bubble bullet muzzle velocity test macro Download PDFInfo
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- CN209342740U CN209342740U CN201821988726.0U CN201821988726U CN209342740U CN 209342740 U CN209342740 U CN 209342740U CN 201821988726 U CN201821988726 U CN 201821988726U CN 209342740 U CN209342740 U CN 209342740U
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- semiconductor laser
- photoelectric sensor
- air bubble
- bullet
- gun barrel
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Abstract
The utility model relates to a kind of air bubble bullet muzzle velocity test macros, including gun barrel, it is characterized in that: further including semiconductor laser, photoelectric sensor, signal isolator, DC power supply and digital signal sampler, semiconductor laser is equipped in the gun barrel exit side wall, photoelectric sensor is equipped in gun barrel exit side wall and semiconductor laser relative position, the photoelectric sensor is connect by signal isolator with digital signal acquiring instrument, and semiconductor laser and signal isolator are connect with DC power supply respectively.The utility model has the advantages that the utility model forms laser velocimeter system using semiconductor laser and photoelectric sensor, then cooperate signal acquiring processing system, cost is relatively low, can be generalized on a large scale in the demand that tests the speed of similar bullet.System has easy to operate, and at low cost, applied widely, the advantages that measurement accuracy is high, by the high data actuation of the photoelectric sensor and sample frequency of selecting reaction speed fast, measuring speed is up to 1000m/s.
Description
Technical field
The utility model belongs to physical measurement testing field more particularly to a kind of air bubble bullet muzzle velocity test system
System.
Background technique
Air bubble is that energy is provided by compressed air, a kind of equipment that abrupt release pushes bullet to fly out.There are many use for it
On the way: 1, kinetic characteristics, state equation and Wuli-Shili-Renli system approach of the research material under impact compress；2, it is made into a kind of mould
The pilot system of quasi- far field Explosive separation impact, thus the ability that checking construction part or electronic device absorb impact；3, it can be made into
Bird hits or bullet impact system, and the ability that bird is hit is born at the certain positions of examination aircraft or examination anti-riot door bears implements and destroys impact
Ability.During the realization of these functions, the speed of bullet is the most heavy of impact conditions or impact energy in determining material
One of parameter is wanted, therefore, precise measurement bullet speed is very necessary and important.Usually there are mainly three types of classes for the method for measurement bullet speed
Type.The first, contact measurement method, such as aluminium foil target, copper mesh target etc..The second, contactless measurement, contactless survey
Amount method mainly passes through photoelectric effect or galvanomagnetic-effect is completed.Third, millimeter wave speed-measuring method.Three kinds of air bubble on the way
Need to measure the muzzle velocity of bullet.Especially as Explosive separation impact test system in use, need according to different
Experimental condition replaces the bullet of different size and weight.It needs to place impact resonant panel in gun muzzle 100mm of air bubble, causes
The distance and space that velocity measuring system can be placed become very little.These three methods all are inconvenient to make due to above-mentioned limitation
With, or even if using precision it is not high.In addition, bullet beats the acceleration that can also generate tens of thousands of g on resonant panel, to bullet itself
Also identical impact energy can be generated, is also not suitable for using the measurement method for placing radio speed sensor in bullet.Patent
Document publication number 103630819A discloses a kind of device of RFID chip performance test, it is characterised in that: it includes air bubble
(1), air bubble (1) mouth is connected with gun tube (2), and air bubble (1) and gun tube (2) are mounted on bracket (3), and gun tube (2) two sides are set
There are speed sensor (4), can sense the interior RFID chip movement velocity of gun tube (2), the interior RFID chip high-speed motion of gun tube (2)
Under readwrite performance can be captured by read-write equipment (5)；The air bubble (1) is controlled by control device (6).The above-mentioned prior art
Higher speed is not met by using the bullet muzzle velocity of RFID chip test air bubble.In order to solve the above problem, urgently
Developing one kind, cost is relatively low, the air bubble bullet muzzle velocity test system that can be generalized on a large scale in the demand that tests the speed of similar bullet
System.
Utility model content
The utility model is in order to overcome the shortcomings in the prior art, to provide a kind of air bubble bullet muzzle velocity test system
System provides data support for the impact energy of bullet.
The utility model to achieve the above object, is achieved through the following technical solutions, a kind of air bubble bullet muzzle velocity
Test macro, including gun barrel, it is characterized in that: further including semiconductor laser, photoelectric sensor, signal isolator, DC power supply
With digital signal sampler, semiconductor laser is equipped in the gun barrel exit side wall, is swashed in gun barrel exit side wall and semiconductor
Photoelectric sensor is equipped on light device relative position, the photoelectric sensor is connected by signal isolator and digital signal acquiring instrument
It connects, semiconductor laser and signal isolator are connect with DC power supply respectively.
The semiconductor laser and photoelectric sensor are fixed in the aperture on gun barrel wall, close to outlet port, are used
Vacuum cement is fixed in hole.
The semiconductor laser is individually connect with a DC power supply, and signal isolator individually connects with a DC power supply
It connects.
The wavelength of light that the semiconductor laser issues is consistent with the light receiver wavelength of photoelectric sensor.
The reaction time of the photoelectric sensor is 5ns.
The sample frequency of the digital signal acquiring instrument is up to 100000Hz.
The utility model has the advantages that compared with prior art, the utility model is swashed using semiconductor laser and photoelectric sensor composition
Flash ranging speed system, then cooperate signal acquiring processing system, cost is relatively low, can be generalized to the demand that tests the speed of similar bullet on a large scale
In.System has easy to operate, and at low cost, applied widely, the advantages that measurement accuracy is high passes through the light for selecting reaction speed fast
Electric transducer and the high data actuation of sample frequency, measuring speed is up to 1000m/s.
Detailed description of the invention
Fig. 1 is the connection block diagram of the utility model；
Fig. 2 is the system connection schematic diagram that two semiconductor lasers are arranged in embodiment 1；
Fig. 3 is the system connection schematic diagram of single semiconductor laser when embodiment 2 is arranged；
The schematic diagram data that digital signal acquiring instrument acquires when Fig. 4 is bullet length d < L；
The schematic diagram data that digital signal acquiring instrument acquires when Fig. 5 is bullet length d > L；
Fig. 6 is the schematic diagram data of 2 digital signal acquiring instrument of embodiment acquisition.
In figure: 1, gun barrel, 2, bullet, 3, semiconductor laser, 4, photoelectric sensor, 5, object, 6, signal isolator,
7, DC power supply, 8, digital signal acquiring instrument, 9, computer.D, bullet length, L, two photoelectric sensor intervals, Δ t, pulse spacing
Time.
Specific embodiment
In conjunction with the preferred embodiment, to according to specific embodiment provided by the utility model, details are as follows:
It is detailed in attached drawing 1, present embodiment discloses a kind of air bubble bullet muzzle velocity test macro, including gun barrel 1, is partly led
Body laser 3, photoelectric sensor 4, signal isolator 6, DC power supply 7 and digital signal sampler 8, the gun barrel exit side wall
On be equipped with semiconductor laser, be equipped with photoelectric sensor on gun barrel exit side wall and semiconductor laser relative position, it is described
Photoelectric sensor is connect by signal isolator with digital signal acquiring instrument, and semiconductor laser and signal isolator are respectively and directly
The connection of galvanic electricity source.Digital signal acquiring instrument is connect with computer 9.The semiconductor laser and photoelectric sensor are fixed on gun barrel wall
On aperture in, close to outlet port, be fixed in hole using vacuum cement.The semiconductor laser individually with a direct current
Power supply connection, signal isolator are individually connect with a DC power supply.The wavelength of light and light that the semiconductor laser issues
The light receiver wavelength of electric transducer is consistent.The reaction time of the photoelectric sensor is 5ns.The digital signal acquiring instrument
Sample frequency reaches as high as 100000Hz.
Working principle
Using laser photoelectricity speed-measuring method, using laser beam interrupter-type measuring principle, between acquisition photoelectric sensor pulse
Every obtaining speed divided by interpulse period Δ t with bullet length d or two photoelectric sensor interval L；The semiconductor laser hair
The light of specific wavelength out, the light that photoelectric sensor receives specific wavelength generate electric current；Signal isolator is by photoelectric sensor
The electric current of generation is converted to voltage signal；The voltage signal that signal sampler acquisition signal isolator passes over, digital signal
Acquisition Instrument acquires signal, passes through computer for analysis and shows.
The course of work
Embodiment 1
System connection is detailed in attached drawing 2, two laser methods: two semiconductor laser installings are exported up and down in gun barrel at a distance of L
Two through-holes on, two photoelectric sensors are mounted on two through-holes opposite with laser；Direct current is led to laser,
The laser that semiconductor laser issues is radiated at respectively on two photoelectric sensor PIN, and PIN generates direct current photoelectric current；When a length
Degree is that the bullet 2 of d successively interdicts this two beams laser when flying over, then the photoelectric current of PIN pipe becomes zero, output photoelectric pulse, by light
Electric pulse is convertible into voltage signal by signal isolator, can be collected by digital signal acquiring device, and then measure this
The time interval Δ t of two photoimpacts can then calculate bullet speed with distance divided by time interval.
Embodiment 2
Attached drawing 3 is shown in system connection, single laser method: by a semiconductor laser installing in the position exported close to gun barrel,
Photoelectric sensor is installed on its relative position, bullet has certain length d, and when bullet is flown over, the photoelectric current of PIN pipe is from having
To without having arrived again, the time interval without photoelectric current can measure, with bullet length d divided by time interval Δ t, and then calculate bullet speed.
As needed, the suitable through-hole of two or four diameter is beaten in gun barrel outlet port, by semiconductor laser and light
Electric transducer is put into wherein and fixed, setting object 5, the head of semiconductor laser and photoelectric sensor in front of gun barrel outlet
Portion cannot stretch out gun barrel wall, in order to avoid the bullet damage moved；The fixation of semiconductor laser and photoelectric sensor and gun barrel is adopted
With vacuum cement, viscous and joint filling, is mounted and dismounted more convenient.
The effect of signal isolator is that current signal is converted to voltage signal, and digital signal acquiring device is facilitated to acquire.One
It is because what photoelectric sensor generated when sensing light intensity is current signal, second is that digital signal acquiring instrument generally can only
Collection voltages signal.The selection of digital signal acquiring instrument should use up guarantee sample frequency, and the higher the better, because velocity of shot is faster, arteries and veins
Punching interval is smaller, and then requires digital signal acquiring instrument energy acquisition data as much as possible, keeps the time interval of analysis more accurate,
What the present embodiment was selected is eastern magnificent 5927 digital signal acquiring instrument.
Semiconductor laser and signal isolator require DC power supply power supply, direct current needed for the laser of different capacity
Pressure is different, and the optical maser wavelength that different lasers is issued is different；Photoelectric sensor is only quicker to the light of specific wavelength
Sense, can generate stronger electric current, so should select matched laser and photoelectric sensor in the system of establishment.In addition, as far as possible
The photoelectric sensor of fast response time is selected, the interpulse period measured in this way is more accurate.That the present embodiment is selected is 650nm
10mW laser and 2.5mm Silicon PIN photoelectric sensor, response wave length 400-1100nm, most sensitive light source are
950nm, response intensity is in 650nm up to 0.44mA/mW, response time 5ns.
As shown in figure 3, for two-laser method, as bullet length d < L, the collected data of digital signal acquiring instrument
It draws；Bullet first passes through lower PIN, and lower PIN is not felt by light source i.e. no current and exports, until bullet is completely by lower PIN, under
PIN restoring current；When bullet is between upper and lower PIN, two PIN generate electric current, until bullet starts to shelter from upper PIN；Upper PIN
Continue to generate electric current until bullet passes completely through, number, which is adopted, forms acquisition curve as shown in Figure 4, and bullet passes through used in L
Time Δ t is since the time difference for starting to block lower PIN and blocking upper PIN to, with (L/ Δ t) is shell speed.
As shown in figure 4, for two-laser method, as bullet length d > L, the collected data of digital signal acquiring instrument
It draws；Bullet first passes through lower PIN, and lower PIN is not felt by light source i.e. no current and exports, until bullet is completely by lower PIN, with figure
Due to d > L unlike 3, thus when bullet not yet completely by lower PIN when, that is, started to block PIN, formed beam PIN
The currentless period simultaneously；When bullet passes through lower PIN, lower PIN restoring current completely；Upper PIN is passed completely through until bullet
Restore to generate electric current, number, which is adopted, forms acquisition curve as shown in Figure 5, and it is from the beginning of that bullet, which passes through time Δ t used in L,
Lower PIN is blocked to the time difference for starting to block upper PIN, with (L/ Δ t) is shell speed.
As shown in figure 5, for single laser method, the collected map data of digital signal acquiring instrument.When bullet passes through PIN
Start to shut out the light, generates electric current until restoring light by PIN, PIN completely, number, which is adopted, forms acquisition as shown in FIG. 6
Curve, bullet stroke be time Δ t used in bullet length d be from start to block PIN to PIN restoring current it is flashy when
Between it is poor, with (d/ Δ t) is shell speed.
Above-mentioned reference embodiment is illustrative to a kind of detailed description of air bubble bullet muzzle velocity test macro
Without being restrictive, several embodiments can be enumerated according to limited range, therefore do not departing from the utility model totality
Change and modification under design, should belong within the protection scope of the utility model.
Claims (6)
1. a kind of air bubble bullet muzzle velocity test macro, including gun barrel, it is characterized in that: further including semiconductor laser, light
Electric transducer, signal isolator, DC power supply and digital signal sampler are equipped with semiconductor laser in the gun barrel exit side wall
Device is equipped with photoelectric sensor in gun barrel exit side wall and semiconductor laser relative position, and the photoelectric sensor passes through letter
Number isolator is connect with digital signal acquiring instrument, and semiconductor laser and signal isolator are connect with DC power supply respectively.
2. air bubble bullet muzzle velocity test macro according to claim 1, it is characterized in that: the semiconductor laser
It is fixed in the aperture on gun barrel wall with photoelectric sensor, close to outlet port, is fixed in hole using vacuum cement.
3. air bubble bullet muzzle velocity test macro according to claim 1, it is characterized in that: the semiconductor laser
It is individually connect with a DC power supply, signal isolator is individually connect with a DC power supply.
4. air bubble bullet muzzle velocity test macro according to claim 1 or 2, it is characterized in that: the semiconductor swashs
The wavelength of light that light device issues is consistent with the light receiver wavelength of photoelectric sensor.
5. air bubble bullet muzzle velocity test macro according to claim 4, it is characterized in that: the photoelectric sensor
Reaction time is 5ns.
6. air bubble bullet muzzle velocity test macro according to claim 1, it is characterized in that: the digital signal acquiring
The sample frequency of instrument is up to 100000Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821988726.0U CN209342740U (en) | 2018-11-29 | 2018-11-29 | Air bubble bullet muzzle velocity test macro |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821988726.0U CN209342740U (en) | 2018-11-29 | 2018-11-29 | Air bubble bullet muzzle velocity test macro |
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| CN209342740U true CN209342740U (en) | 2019-09-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580977A (en) * | 2018-11-29 | 2019-04-05 | 天津航天瑞莱科技有限公司 | Air bubble bullet muzzle velocity test macro |
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2018
- 2018-11-29 CN CN201821988726.0U patent/CN209342740U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580977A (en) * | 2018-11-29 | 2019-04-05 | 天津航天瑞莱科技有限公司 | Air bubble bullet muzzle velocity test macro |
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