CN106556842A - A kind of laser velocimeter device for taking into account high-speed camera Trigger Function - Google Patents
A kind of laser velocimeter device for taking into account high-speed camera Trigger Function Download PDFInfo
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- CN106556842A CN106556842A CN201610954852.3A CN201610954852A CN106556842A CN 106556842 A CN106556842 A CN 106556842A CN 201610954852 A CN201610954852 A CN 201610954852A CN 106556842 A CN106556842 A CN 106556842A
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- Prior art keywords
- laser
- speed camera
- oscillograph
- speed
- taking
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/50—Systems of measurement based on relative movement of target
- G01S17/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of laser velocimeter device for taking into account high-speed camera Trigger Function, including the passage that tests the speed, generating laser, laser pickoff, power supply, oscillograph, high-speed camera and computer.The passage that tests the speed is fixed on the exit of projectile transmitting device, generating laser and symmetrical being fixed on of laser pickoff are tested the speed on passage, the tachometer signal outfan of laser receiver accesses oscillographic input, oscillographic signal output part accesses high-speed camera, high-speed camera is triggered by receiving the signal that sends of oscillograph, the automatic triggering of high-speed camera can be realized, the speed of bullet can be calculated by reading the waveform on oscillograph.The photography observation of achievable Projectile Penetration target plate and speed measuring function, and accuracy is high, repeats and utilizes.
Description
Technical field
The invention belongs to analyze and measuring speed control technology field, more particularly to a kind of Projectile Penetration target plate test the speed and
Penetration shoots triggering device.
Background technology
In the experiment of bullet high-speed impact target plate, the speed of Projectile Penetration target plate is a critically important parameter, while seeing
Examine the process of Projectile Penetration target plate for analysis bullet and target plate deformation also it is critical that.
The speed method of the Projectile Penetration target plate of China's measurement at present has tinfoil paper plate method, the brush magnetic spy skill of handling needles and High Speed Photography
Deng, the comparison trouble of tinfoil paper target and probe sample higher using mortality when tinfoil paper plate method and the brush magnetic spy skill of handling needles, time-consuming consumption
Power, and tinfoil paper target tests the speed and necessarily requires bullet for conductor, limits its use range.And High Speed Photography is adopted, should measure
Velocity of shot will also shoot Penetration, by spot for photography and the angle limits of high-speed camera, generally require Liang Tai and Liang Tai
Above high-speed camera, and high-speed camera is expensive, and experimental expensess can be caused higher.
High-speed camera triggering has triggering manually and signal triggering, as triggering needs people to go triggering manually, when high speed is taken the photograph
During as instrument close to experiment place, when bullet high-speed impact target plate is tested, danger is high, so manual triggering is worthless,
The moment triggered simultaneously is not easy to hold；Triggering is too early, and as the time that high-speed camera shoots is very short, whole Penetration can
Can clap incomplete；Triggering too late, the early stage of penetrating steel target may clap less than.Existing signal triggering high-speed camera then needs to arrange special
The signal source of door so that experimental provision is complicated during experiment.
Meanwhile, also there are many people to adopt laser velocimeter in recent years, but need mostly to make Laser emission and reception device, letter by oneself
Number process need the elements such as front end circuit amplifier, single-chip microcomputer so that preliminary preparation time of experiment lengthens, and necessary
Experimental Calibration several times is carried out to homemade speed measuring device.In addition, many laser velocimeter devices, it is desirable to two groups of Laser emission in front and back
The length of bullet is have to be larger than with the distance of reception device, so as to Laser Measuring quick-mounting is limited in the case of some limited spaces
The use put.
Patent in terms of the disclosed laser velocimeter with regard to for measuring velocity of shot, including：201220118146.2 swash
Photoelastic body tachymeter, 201320707669.5 are used to measure the laser light curtain shading type of light-gas gun grade velocity of shot and test the speed and be
The dress that tests the speed under system, a kind of 201510413966.2 High-velocity Projectiles speed measuring devices, a kind of 201520975599.0 HI high impact environment
Put, there is presently no and take into account the laser velocimeter device Patents of high-speed camera Trigger Function and can read up the literature.
The content of the invention
For existing bullet speed measuring device complexity, precision is low and high-speed camera triggering is dangerous, control difficult problem, carries
Go out a kind of laser velocimeter device for taking into account high-speed camera Trigger Function, can effectively solve the problem that Projectile velocity measurements and high-speed photography
The complicated problem of instrument triggering.
The speed measuring device for taking into account high-speed camera Trigger Function of invention, is capable of achieving the photography of Projectile Penetration target plate
Observation and speed measuring function, comprising the passage that tests the speed, generating laser, laser pickoff, power supply, oscillograph, high-speed camera and electricity
Brain.The passage that tests the speed is fixed on the exit of projectile transmitting device, generating laser and laser pickoff is symmetrical is fixed on
Test the speed on passage, the tachometer signal outfan of laser receiver accesses oscillographic input, and oscillograph receive two
The tachometer signal that group is independent of each other so that the distance of the length of bullet or two groups of Laser emission reception devices is unrestricted.Show
The signal output part of ripple device accesses high-speed camera, and high-speed camera is triggered by receiving signal that oscillograph sends.
Advantage of the present invention：
(1) the automatic triggering of high-speed camera can be realized.
(2) laser velocimeter method is simple, and accuracy is high, and it is little to be disturbed factor, repeats and utilizes.
(3) realize laser velocimeter and high-speed photography relevant device is shared, reduce experimental facilitiess requirement, and measure more steady
It is fixed reliable.
Description of the drawings
Fig. 1 is the circuit connection block diagram of high-speed camera triggering of the present invention and speed measuring device；
Fig. 2 is that generating laser and laser pickoff are fixed on the passage principle sketch that test the speed；
Fig. 3 is oscillograph wiring schematic diagram；
Fig. 4 is the electrical schematic diagram of generating laser 2 and laser pickoff 3；
Fig. 5 is oscillograph level change oscillogram.
Specific embodiment
The present invention is described in further detail with implementation process below in conjunction with the accompanying drawings.
As shown in figure 1, the present invention relates to a kind of Penetration shooting of Projectile Penetration target plate and speed measuring device, it includes electricity
Source 1, generating laser 2 (2-1 and 2-2 is 2 groups of generating lasers), (3-1 and 3-2 is 2 groups of laser pick-ofves to laser pickoff 3
Device), power supply 7, power supply 8, oscillograph 4, high-speed camera 5, (9-1 and 9-2 is respectively generating laser and connects for computer 6 and support 9
Receive device support).
As shown in figure 1, support 9 is fixed on the exit of projectile transmitting device, set on support 9-1 and support 9-2 opposite faces
Installation generating laser 2 and laser pickoff 3 are put, the tachometer signal outfan of laser pickoff 3 connects 4 input of oscillograph,
Output signal line connection 5 triggering end of high-speed camera of oscillograph 4, high-speed camera 5 need by computer 6 to operate, show
And record.
Further illustrate as shown in Fig. 2 generating laser 2 and laser pick-off are arranged on support 9-1 and support 9-2 opposite faces
Point-blank, the laser that generating laser 2 is launched just is impinging upon sharp the axis of device 3, generating laser 2 and laser pickoff 3
The center of 3 minute surface of optical receiver；As the minute surface of laser pickoff 3 is than larger, the axle of generating laser 2 and laser pickoff 3
Line is slightly deflected up and down, this test device can also normal work, as long as ensure generating laser 2 transmitting laser impinge upon laser
3 minute surface of receptor, but axis of generating laser 2 and laser pickoff 3 or so is unable to deflection, otherwise this two groups of laser
The distance between sending and receiving apparatus have error can affect rate accuracy.
Generating laser 2-1 and laser pickoff 3-1 constitutes one group of Laser emission reception device 2-3-1, generating laser
2-2 and laser pickoff 3-2 constitutes another group of Laser emission reception device 2-3-2.Generating laser and laser pickoff profile
Column type threaded rod is made all, specific such as generating laser 2-1 nut 10-1 and nut 10-2 make generating laser to twisting
It is fixed on support 9-1, other generating lasers and laser pickoff are also in the same way being fixed on support 9.Two
Group Laser emission reception device may be configured as in the range of 20～100mm apart from L that (L is two groups of Laser emission reception device axis
The distance of line).If known bullet can calculate the speed of bullet through the time difference Δ t of two groups of Laser emission reception devices
Degree v=L/ Δ t.
Generating laser 2 includes two generating lasers 2-1 and 2-2, is all two line styles, and generating laser 2 adopts HONGGUANG
Quasiconductor can adjust the brightness of laser as lasing light emitter by adjusting supply voltage, but no more than supply voltage
Maximum, can otherwise damage generating laser 2.Shown in electrical schematic diagram such as Fig. 4 (1), in figure, 1. BN DC+V connect the positive pole of power supply,
2. BU 0V connect the negative pole of power supply, and are unable to reversal connection, and otherwise generating laser can not launch laser.The dependency of generating laser
Energy and parameter are as follows：
(1) supply voltage：DC10～30V.
(2) using continuous emission type.
(3) wavelength：650nm.
(4) point to 3 degree of angle ＜.
(5) ambient temperature：- 25 DEG C～+55 DEG C.
Laser pickoff 3 includes two laser pickoffs 3-1 and 3-2, is all three line styles, can work in the sunlight, completely
Without interruption.Shown in electrical schematic diagram such as Fig. 4 (2), in figure, 1. BN DC+V connect the positive pole of power supply, and 2. BU 0V connect the negative pole of power supply,
And reversal connection is unable to, otherwise laser pickoff can not receive laser.
(1) supply voltage：DC10～30V (selects direct current+12V) in the present invention.
(2) output type：PNP PO (normally opened).
(3) response time ＜ 1ms (correlation type).
(4) induction mode：Red visible laser type (640～655nm).
(5) ambient temperature：- 25 DEG C～+55 DEG C.
(6) degree of protection：IP67.
As shown in Fig. 4 (2), laser pickoff 3 has an output lead 3. BK OUT, for exporting high level, it and 2. BU
0V accesses oscillographic input together.
Further illustrate and refer to shown in Fig. 3, oscillographic 4-1 is that power input terminates power supply 8 (civil power 220V), oscillography
The 4-2 of device be signal output terminate high-speed camera 5 triggering end, oscillographic 4-3 and 4-4 be input, laser pickoff
The output lead of 3-1 3. BK OUT and 2. BU 0V access oscillographic input 4-3 together, the output lead of laser pickoff 3-2 is 3.
BK OUT and 2. BU 0V access oscillographic input 4-4 together.
Due to oscillographic input 4-3 receive be laser pickoff 3-1 signal, oscillographic input 4-4 connects
What is received is the signal of laser pickoff 3-2, so what oscillograph received is two groups of tachometer signals being independent of each other, Fructus Psoraleae bullet
The distance of length or two groups of Laser emission reception devices is unrestricted.
With reference to shown in Fig. 1,5 triggering end of high-speed camera is connected to the output signal line of oscillograph 4, and high-speed camera passes through
Receive the signal that sends of oscillograph to trigger.High-speed camera 5 is operating, show and record, to arrange and take the photograph at a high speed by computer 6
5 shooting speed of shadow instrument and resolution etc..High-speed camera 5 is triggered using high level, as long as 5 triggering end of high-speed camera
High level (now high-speed camera is in triggering state) is received, high-speed camera 5 will be triggered, and then be recorded a video.
It is that the trigger signal source for triggering high-speed camera (selects 4-4 for triggering in the present invention that passage 4-3 or 4-4 are arranged in oscillograph 4
The trigger signal source of high-speed camera 5), the trigger value set in the signal of passage 4-4 in oscillograph 4 is higher than oscillograph 4 shows
The signal output part 4-2 of ripple device 4 can produce the trigger of high level.In the present invention signal output part 4-2 of oscillograph 4 for+
The high level output of 5V, the signal output part 4-2 of oscillograph 4 connect high-speed camera 5, and high-speed camera 5 is by receiving oscillograph 4
The signal for sending is triggering.
Operation principle
When pellet injection passes through speed measuring device, the generating laser 2-1 and 2-2 transmitting laser installed in support 9-1 sides shines
On the laser pickoff 3-1 and 3-2 of support 9-2, bullet does not also cover laser, now the output of laser pickoff 3
End is not turned on, and 3. BK OUT voltages are 0V to output lead, and oscilloscope display is 0V, and high-speed camera is not triggered.When bullet is reached
When on the laser axis line of Laser emission reception device 1, now bullet has covered laser, and laser pickoff 3-1 conductings, laser connect
3. BK OUT are mutually all+12V with the voltage of power supply 7 to the output lead of receipts device 3-1, shown in such as Fig. 5 (1), are changed into high electricity from low level
It is flat.The output lead of laser pickoff 3-1 3. BK OUT and 2. BU 0V access oscillographic input 4-3 together, lead on oscillograph
Road 4-3 is changed into high level+12V from low level 0V, and waveform is square wave, whole bullet swashing through Laser emission reception device 1
After optical axis, oscillograph upper channel 4-3 is changed into low level 0V from high level+12V.
When bullet is reached on the laser axis line of Laser emission reception device 2, now bullet has covered laser, and laser connects
Device 3-2 conductings are received, 3. BK OUT are mutually all+12V with the voltage of power supply 7 to the output lead of laser pickoff 3-2, such as Fig. 5 (2) institute
Show, high level is changed into from low level.The output lead of laser pickoff 3-2 3. BK OUT and 2. BU 0V access together it is oscillographic
Input 4-4, oscillograph upper channel 4-4 are changed into high level+12V from low level 0V, and waveform is square wave.Now oscillograph 4
Signal output part 4-2 output high level+5V trigger the high-speed camera 5 treated in triggering state, and high-speed camera 5 is recorded
Picture.Need to first pass through computer 6 to arrange shooting speed and resolution of high-speed camera 5 etc. before experiment.When whole bullet is through swashing
After the laser axis of optical transmission/reception device 2, oscillograph upper channel 4-4 is changed into low level 0V from high level+12V.
Finally as shown in figure 5, the square wave of the square wave and passage 4-4 that can pass through oscillograph upper channel 4-3 calculates the time
Difference Δ t.Due to the diameter very little of laser beam, about 1～2mm of Φ, so the time calculated by square wave on oscillograph
The application condition of difference Δ t is little.If known two groups of Laser emission reception devices apart from L, can be calculated by formula v=L/ Δs t
Go out the speed of bullet.
Claims (5)
1. a kind of laser velocimeter device for taking into account high-speed camera Trigger Function, including power supply 1,2 (2-1 and 2-2 of generating laser
For 2 groups of generating lasers), it is laser pickoff 3 (3-1 and 3-2 is 2 groups of laser pickoffs), power supply 7, power supply 8, oscillograph 4, high
Fast photographic apparatuss 5, computer 6 and support 9 (9-1 and 9-2 is respectively generating laser and receiver holder), it is characterised in that：Support 9
The exit of projectile transmitting device is fixed on, is arranged on support 9-1 and support 9-2 opposite faces and generating laser 2 and laser is installed
Receptor 3, tachometer signal outfan connection 4 input of oscillograph of laser pickoff 3, the output signal line connection of oscillograph 4
5 triggering end of high-speed camera, high-speed camera 5 need by computer 6 to operate, show and record.
2. a kind of laser velocimeter device for taking into account high-speed camera Trigger Function according to claim 1, it is characterised in that
Generating laser and laser pickoff profile all make column type threaded rod, and two nuts of generating laser make laser to twisting
Emitter and laser pickoff are fixed on support.
3. a kind of laser velocimeter device for taking into account high-speed camera Trigger Function according to claim 1, it is characterised in that
Laser pickoff 3 is three line styles, and laser pickoff 3 has an output lead 3. BK OUT, for exporting high level, it and 2. BU
0V accesses oscillographic input together.
4. a kind of laser velocimeter device for taking into account high-speed camera Trigger Function according to claim 1, it is characterised in that
What oscillograph was received is the level signal of two laser pickoffs, produces two square waves, and receive two groups of oscillograph are mutual
The tachometer signal not affected.
5. a kind of laser velocimeter device for taking into account high-speed camera Trigger Function according to claim 1, it is characterised in that
The signal output part 4-2 of oscillograph 4 can produce the trigger of high level, and the signal output part 4-2 of oscillograph 4 connects high-speed photography
Instrument 5, high-speed camera 5 are triggered by receiving the signal that sends of oscillograph 4.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610954852.3A CN106556842A (en) | 2016-10-27 | 2016-10-27 | A kind of laser velocimeter device for taking into account high-speed camera Trigger Function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610954852.3A CN106556842A (en) | 2016-10-27 | 2016-10-27 | A kind of laser velocimeter device for taking into account high-speed camera Trigger Function |
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| CN106556842A true CN106556842A (en) | 2017-04-05 |
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| CN201610954852.3A Pending CN106556842A (en) | 2016-10-27 | 2016-10-27 | A kind of laser velocimeter device for taking into account high-speed camera Trigger Function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436218A (en) * | 2017-08-31 | 2017-12-05 | 南京理工大学 | A kind of experimental provision of Projectile Penetration target plate |
| CN109212251A (en) * | 2018-08-22 | 2019-01-15 | 南京理工大学 | A kind of laser bullet speed measuring instrument and its speed-measuring method |
| CN112798440A (en) * | 2020-12-28 | 2021-05-14 | 中南大学 | High-speed impact penetration resistance performance testing device and testing method for honeycomb structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436218A (en) * | 2017-08-31 | 2017-12-05 | 南京理工大学 | A kind of experimental provision of Projectile Penetration target plate |
| CN109212251A (en) * | 2018-08-22 | 2019-01-15 | 南京理工大学 | A kind of laser bullet speed measuring instrument and its speed-measuring method |
| CN112798440A (en) * | 2020-12-28 | 2021-05-14 | 中南大学 | High-speed impact penetration resistance performance testing device and testing method for honeycomb structure |
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