CN108008143A - A kind of laser velocimeter devices and methods therefor of bullet exit portal speed - Google Patents
A kind of laser velocimeter devices and methods therefor of bullet exit portal speed Download PDFInfo
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- CN108008143A CN108008143A CN201711248771.2A CN201711248771A CN108008143A CN 108008143 A CN108008143 A CN 108008143A CN 201711248771 A CN201711248771 A CN 201711248771A CN 108008143 A CN108008143 A CN 108008143A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 62
- 230000003287 optical effect Effects 0.000 claims description 15
- 239000013307 optical fiber Substances 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 6
- 239000000523 sample Substances 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 230000004907 flux Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 230000005693 optoelectronics Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 12
- 230000001133 acceleration Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 230000005622 photoelectricity Effects 0.000 description 2
- 239000005441 aurora Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001259 photo etching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000000827 velocimetry Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
- G01P3/68—Devices characterised by the determination of the time taken to traverse a fixed distance using optical means, i.e. using infrared, visible, or ultraviolet light
- G01P3/685—Devices characterised by the determination of the time taken to traverse a fixed distance using optical means, i.e. using infrared, visible, or ultraviolet light for projectile velocity measurements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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- General Physics & Mathematics (AREA)
- Optical Radar Systems And Details Thereof (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of laser velocimeter device of bullet exit portal speed, including bomb tube, bullet, laser transmitting-receiving module, timing unit, photoelectric conversion unit and processor, bullet axis direction is provided with some light and shade stripeds in the bullet body diameter, the width of light and shade striped is equal described in each group, and bright fringe is equal with the width of dark fringe, the exit portal of the bomb tube is provided with laser transmitting-receiving module, the signal output part of the photoelectric conversion unit and the signal input part of timing unit connect, the signal output part of the timing unit and the signal input part of processor connect, the signal output part of the processor and the signal input part of display connect.The present invention provides a kind of laser velocimeter devices and methods therefor of bullet exit portal speed, its is simple in structure, and measurement error is smaller.
Description
Technical field
The invention belongs to laser velocimeter field, the laser velocimeter device of more particularly to a kind of bullet exit portal speed and its side
Method.
Background technology
The muzzle velocity of bullet reflects the emissivities of loading device, and the muzzle velocity of bullet has actual research
Larger meaning, common contact speed-measuring method include sonde method and target collimation method, and not only measurement accuracy is relatively low, but also can influence
The flight attitude of bullet, contactless speed-measuring method include laser method and electromagnetism velocimetry etc., can only measure bullet and fly
The average speed in a certain stage in journey, larger measurement error, and bullet can be produced in the case where velocity of shot changes greatly
Ball flight apart from stroke measurment again there are error, and average speed can only be measured, the speed course of bullet can not be calculated.
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 bullet exit portal speed
Laser velocimeter devices and methods therefor, its is simple in structure, and measurement error is smaller.
Technical solution：To achieve the above object, technical scheme is as follows：
A kind of laser velocimeter device of bullet exit portal speed, including bomb tube, bullet, laser transmitting-receiving module, timing unit,
Photoelectric conversion unit and processor, are provided with some light and shade stripeds, each group in the bullet body diameter along bullet axis direction
The width of the light and shade striped is equal, and bright fringe is equal with the width of dark fringe, and the exit portal of the bomb tube is provided with laser
Transceiver module, the signal output part of the photoelectric conversion unit and the signal input part of timing unit connect, the timing unit
Signal output part and the signal input part of processor connect, the signal of the signal output part of the processor and display inputs
End connection.
Further, the laser transmitting-receiving module includes laser transceiver, optical fiber and bullet seizure probe, the laser receipts
Device is sent out by optical fiber to playing pipe pre-support laser beam, and the laser beam is perpendicular to the axis of bomb tube, by bullet body
The laser beam of upper bright fringe reflection catches probe by bullet and returns in optical fiber, and carries out signal via photoelectric conversion unit
Conversion.
Further, the light hole passed through for laser beam is offered on the bomb tube, is provided with the light hole poly-
Light microscopic and optical filtering, the condenser, optical filtering are set gradually along laser emitting rays path.
Further, the timing unit includes the first timer and the second timer, and the photoelectric conversion unit includes
First photoelectric conversion unit and the second photoelectric conversion unit, the signal input part of first timer and the first opto-electronic conversion list
The signal output part connection of member, the signal input part of second timer and the signal output part of the second photoelectric conversion unit connect
Connect；The first photoelectric conversion unit adjacent laser transceiver module is set, and on the path of laser beam reflection, and described the
Two photoelectric conversion units are provided on the opposite bomb tube wall body of laser transmitting-receiving module, and positioned at the direct path of laser beam
On.
Further, the bullet is column construction, and the width of some groups of light and shade stripeds on the bullet outside diameter it
With the total length equal to bullet.
Further, the internal diameter gap setting of the bullet and bomb tube, the laser transmitting-receiving module is apart from bomb tube exit portal
Distance be equal to the width of one group of light and shade striped.
A kind of method of the laser velocimeter of bullet exit portal speed：Laser transceiver launches laser beam and is radiated at second
On photoelectric conversion unit, fly after pellet injection in bomb tube, when bullet passes through laser beam, luminous flux produces change, the
Two photoelectric conversion units trigger the second timer and start timing；
When bullet rigid connection is touched and blocks laser beam, by bright fringe reflection laser light, laser transmitting-receiving module receives
The laser beam of reflection, and signal conversion is carried out by the first photoelectric conversion unit, the first photoelectric conversion unit triggers the at the same time
One timer starts timing；
After the stroke of one group of bright fringe of projectile flight, laser light irradiation is in dark fringe region, the laser reflected at this time
Light beam interruption, while the first photoelectric conversion unit can't detect optical signal, the first timer of triggering stops timing；
Bullet continues to fly, after some groups of light and shade stripeds, the multigroup time interval data of the first timer record；
After bullet terminates flight, the second photoelectric conversion unit receives optical signal again, while triggers the second timer and stop
Only timing；
Processor obtains chronometric data from timing unit, and the speed of bullet is calculated by each group time interval.
Beneficial effect：Light and shade striped on the bullet of the present invention can carry out compartment when bullet passes through laser beam
Reflection laser light, and obtain multiple time intervals, and can continuously measure bullet high speed under velocity variations, calculate
Bullet acceleration, and then calculate speed course of the bullet in bomb tube；And its distance that tests the speed can adjust, have logical well
The property used.
Brief description of the drawings
Attached drawing 1 is overall structure diagram of the invention；
Attached drawing 2 is the structure enlargement diagram of the laser transmitting-receiving module of the present invention；
Attached drawing 3 is bomb tube and Projectile Motion view of the invention.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of laser velocimeter device of bullet exit portal speed, including bomb tube 1, bullet 2, laser transmitting-receiving
Module 3, timing unit 4, photoelectric conversion unit 9 and processor, are provided with along bullet axis direction in 2 body diameter of bullet
Some light and shade stripeds 5, the width of light and shade striped 5 is equal described in each group, and the width of bright fringe 5a and dark fringe 5b are equal, light and shade
Striped overall width is d, and the exit portal of the bomb tube 1 is provided with laser transmitting-receiving module 3, and the signal of the photoelectric conversion unit 9 is defeated
Outlet is connected with the signal input part of timing unit 4, the signal output part of the timing unit 4 and the signal input part of processor
Connection, the signal output part of the processor and the signal input part of display connect.When the light and shade striped of bullet passes through laser
During light beam, electric signal is converted optical signals into by reflections of the bright fringe 5a to laser beam, and via photoelectric conversion unit 9,
Meanwhile triggering timing unit starts timing, bullet is recorded by the time interval of each bright fringe, and is calculated within a processor
Speed when bullet is by each bright fringe, and bullet acceleration can be calculated successively；Its overall measuring method is simple, conveniently, and
And the of simple structure and strong practicability of device；Moreover, the measurement of each speed parameter is completed in the transmitting stroke of same bullet,
Dramatically reduce measurement error；Ensure that the accuracy of measurement structure is higher；
Velocity of shot is calculated using formula v=c/t, v is that bullet passes through the speed of bright fringe, the width that c is bright fringe in formula
Degree, t are the time by the bright fringe；And utilize V2=V1+at1Bullet acceleration is calculated, V in formula1To first pass through laser light
The speed of line, a are bullet acceleration, t1Bullet passes through the time interval of front and rear two groups of adjacent light and shade stripeds, V2For after by
The speed of laser beam, and according to the instantaneous velocity of bullet acceleration calculation bomb tube exit portal.
The timing unit 4 includes the first timer and the second timer, and the photoelectric conversion unit 9 includes the first photoelectricity
Converting unit and the second photoelectric conversion unit, the signal input part of first timer and the signal of the first photoelectric conversion unit
Output terminal connects, and the signal input part of second timer is connected with the signal output part of the second photoelectric conversion unit；It is described
First photoelectric conversion unit adjacent laser transceiver module 3 is set, and on the path of laser beam reflection, second photoelectricity
Converting unit is provided on the opposite bomb tube wall body of laser transmitting-receiving module, and on the direct path of laser beam.Laser
Transceiver Transmit laser beam is simultaneously radiated on the second photoelectric conversion unit, is flown after pellet injection in bomb tube, when bullet is worn
When crossing laser beam, luminous flux produces change, and the second photoelectric conversion unit triggers the second timer and starts timing；In bullet rigid connection
Touch when blocking laser beam, by bright fringe reflection laser light, laser transmitting-receiving module receives the laser beam of reflection, and leads to
Cross the first photoelectric conversion unit and carry out signal conversion, the first photoelectric conversion unit triggers the first timer and starts timing at the same time；When
After the stroke of one group of bright fringe of projectile flight, laser light irradiation is interrupted in dark fringe region, the laser beam reflected at this time, the
While one photoelectric conversion unit can't detect optical signal, the first timer of triggering stops timing；Timing cycle adjacent twice
As bullet can pass through the flying speed that calculation formula calculates bullet by time of bright fringe or dark fringe；Bullet
Continue to fly, after some groups of light and shade stripeds, the multigroup time interval data of the first timer record；After bullet terminates flight,
Second photoelectric conversion unit receives optical signal again, while triggers the second timer and stop timing；The timing of second timer
Interval is time when single bullet entirety all passes through laser beam, and the average speed of bullet can be calculated according to the overall length of bullet
Degree, can will by the instantaneous velocity of each bright fringe 5a carry out average computation, then with bullet entirely through average speed compared with
Compared with contrasting both velocity measuring errors；The width of the bright fringe 5a is optimal in 3~5mm or so, and width is smaller, measures not
Accurately, serious forgiveness is relatively low；Due to the limited length of bullet, if width is larger, light and shade striped quantity is then less, causes measurement
Experimental data is less.To ensure that the width of light and shade striped is accurate, photoetching process can be used to process.
The bullet 2 is column construction, and the both ends of bullet are planar structure, and some groups on 2 outside diameter of the bullet
The sum of width of light and shade striped 5 is equal to the total length of bullet 2.When the bullet front end has just been passed through laser beam, bright fringe just may be used
With reflection laser light, when bullet afterbody has just passed through laser beam completely, the stroke cycle of one group of light and shade striped is just completed, is protected
Demonstrate,prove the timing simultaneity of two timers.
As shown in Figure 2, the laser transmitting-receiving module 3 includes laser transceiver 6, optical fiber 7 and bullet seizure probe 8, institute
State laser transceiver 6 and launch laser beam into bomb tube 1 by optical fiber 7, and the laser beam is perpendicular to the axis of bomb tube 1,
Make aurora light vertical irradiation on light and shade striped, the laser beam reflected by bright fringe on 2 body of bullet is caught by bullet
It is weak back to the energy of laser beam in optical fiber 7, is reduced to catch probe 8, and spread fiber speed is fast, and make the laser of transmitting
Light is consistent with the laser beam stroke received, reduces measurement error, and carry out signal conversion via photoelectric conversion unit.
The light hole passed through for laser beam is offered on the bomb tube 1, condenser 9 and filter are provided with the light hole
Light microscopic 10, the condenser 9, optical filtering 10 are set gradually along laser emitting rays path.Condenser 9 can make laser beam row into
Point straight line, when laser light irradiation is less hot spot of diameter when on light and shade striped, due to the limited width of bright fringe, compared with
Small point hot spot can ensure the accuracy of measurement, and filter heterogeneous light by optical filtering 10, ensure the unicity of light.
The internal diameter gap setting of the bullet 2 and bomb tube 1, makes to keep holding position in projectile flight, the laser transmitting-receiving
Module 3 is equal to the width of one or more groups of light and shade stripeds 5 apart from the distance of bomb tube exit portal, avoids the mixed and disorderly light of bomb tube exit portal
Interference of the line to measurement process, reduces measurement error.
Bright fringe width in the light and shade striped 5 is equal to the integer for the laser beam wavelength that laser transmitting-receiving module 3 is launched
Times.
A kind of method of the laser velocimeter of bullet exit portal speed：Laser transceiver 6 launches laser beam and is radiated at the
On two photoelectric conversion units, bullet 2 flies after launching in bomb tube, and when bullet 2 passes through laser beam, luminous flux produces change
Change, the second photoelectric conversion unit triggers the second timer and starts timing；
When 2 rigid connection of bullet is touched and blocks laser beam, by bright fringe reflection laser light, laser transmitting-receiving module 3 connects
The laser beam of reflection is received, and signal conversion is carried out by the first photoelectric conversion unit, the first photoelectric conversion unit triggers at the same time
First timer starts timing；
After the stroke of one group of bright fringe of projectile flight, laser light irradiation is in dark fringe region, the laser reflected at this time
Light beam interruption, while the first photoelectric conversion unit can't detect optical signal, the first timer of triggering stops timing；
Bullet 2 continues to fly, after some groups of light and shade stripeds, the multigroup time interval data of the first timer record；
After bullet 2 terminates flight, the second photoelectric conversion unit receives optical signal again, while triggers the second timer and stop
Only timing；
Processor obtains chronometric data from timing unit, and the speed of bullet is calculated by each group time interval.
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, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (7)
- A kind of 1. laser velocimeter device of bullet exit portal speed, it is characterised in that：Received including bomb tube (1), bullet (2), laser Module (3), timing unit (4), photoelectric conversion unit (9) and processor are sent out, along bullet axis in bullet (2) body diameter Direction is provided with some light and shade stripeds (5), and the width of light and shade striped (5) is equal described in each group, and the width of bright fringe and dark fringe Spend equal, the exit portal of the bomb tube (1) is provided with laser transmitting-receiving module (3), the signal output of the photoelectric conversion unit (9) End is connected with the signal input part of timing unit (4), and the signal output part of the timing unit (4) and the signal of processor input End connection, the signal output part of the processor and the signal input part of display connect.
- A kind of 2. laser velocimeter device of bullet exit portal speed according to claim 1, it is characterised in that：The laser Transceiver module (3) includes laser transceiver (6), optical fiber (7) and bullet and catches probe (8), and the laser transceiver (6) passes through light Fine (7) transmitting laser beam into bomb tube (1), and the laser beam is perpendicular to the axis of bomb tube (1), by bullet (2) this The laser beam that bright fringe reflects on body catches probe (8) by bullet and returns in optical fiber (7), and via photoelectric conversion unit Carry out signal conversion.
- A kind of 3. laser velocimeter device of bullet exit portal speed according to claim 1 or 2, it is characterised in that：It is described The light hole passed through for laser beam is offered on bomb tube (1), condenser (9) and optical filtering are provided with the light hole (10), the condenser (9), optical filtering (10) are set gradually along laser emitting rays path.
- A kind of 4. laser velocimeter device of bullet exit portal speed according to claim 1, it is characterised in that：The timing Unit (4) includes the first timer and the second timer, and the photoelectric conversion unit (9) includes the first photoelectric conversion unit and the Two photoelectric conversion units, the signal input part of first timer are connected with the signal output part of the first photoelectric conversion unit, The signal input part of second timer is connected with the signal output part of the second photoelectric conversion unit；First opto-electronic conversion Unit adjacent laser transceiver module (3) is set, and on the path of laser beam reflection, second photoelectric conversion unit is set Put and be on bomb tube wall body that laser transmitting-receiving module is opposite, and on the direct path of laser beam.
- A kind of 5. laser velocimeter device of bullet exit portal speed according to claim 1 or 4, it is characterised in that：It is described Bullet (2) is column construction, and the sum of width of some groups of light and shade stripeds (5) on the bullet (2) outside diameter is equal to bullet (2) Total length.
- A kind of 6. laser velocimeter device of bullet exit portal speed according to claim 1, it is characterised in that：The bullet (2) it is bright equal to one group apart from the distance of bomb tube exit portal with the internal diameter gap setting of bomb tube (1), the laser transmitting-receiving module (3) The width of dark fringe (5).
- A kind of 7. method of the laser velocimeter of bullet exit portal speed, it is characterised in that：Laser transceiver (6) launches laser beam And be radiated on the second photoelectric conversion unit, fly after bullet (2) transmitting in bomb tube, when bullet (2) passes through laser beam, Luminous flux produces change, and the second photoelectric conversion unit triggers the second timer and starts timing；When bullet (2) rigid connection is touched and blocks laser beam, by bright fringe reflection laser light, laser transmitting-receiving module (3) connects The laser beam of reflection is received, and signal conversion is carried out by the first photoelectric conversion unit, the first photoelectric conversion unit triggers at the same time First timer starts timing；After the stroke of one group of bright fringe of projectile flight, laser light irradiation is in dark fringe region, the laser beam reflected at this time Interrupt, while the first photoelectric conversion unit can't detect optical signal, the first timer of triggering stops timing；Bullet (2) continues to fly, after some groups of light and shade stripeds, the multigroup time interval data of the first timer record；After bullet (2) terminates flight, the second photoelectric conversion unit receives optical signal again, while triggers the second timer and stop Timing；Processor obtains chronometric data from timing unit, and the speed of bullet is calculated by each group time interval.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711248771.2A CN108008143B (en) | 2017-12-01 | 2017-12-01 | Laser speed measuring device and method for speed of bullet exit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711248771.2A CN108008143B (en) | 2017-12-01 | 2017-12-01 | Laser speed measuring device and method for speed of bullet exit |
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| CN108008143A true CN108008143A (en) | 2018-05-08 |
| CN108008143B CN108008143B (en) | 2023-09-05 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109343073A (en) * | 2018-11-15 | 2019-02-15 | 北京遥感设备研究所 | A kind of Laser Detecting Set and detection method for high-speed maglev train tachometric survey |
| CN112461042A (en) * | 2020-11-19 | 2021-03-09 | 福建卓航特种设备有限公司 | Synchronous percussion performance correction device and correction method |
| CN113567702A (en) * | 2021-08-24 | 2021-10-29 | 化学与精细化工广东省实验室潮州分中心 | Magneto-optical speed measuring system for measuring bullet speed and magneto-optical speed measuring method thereof |
| CN113639583A (en) * | 2020-04-27 | 2021-11-12 | 福建卓航科技有限公司 | Synchronous percussion performance detection device and detection method |
| CN113740558A (en) * | 2021-08-24 | 2021-12-03 | 红云红河烟草(集团)有限责任公司 | Filter stick transmitting and receiving speed on-line velometer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109343073A (en) * | 2018-11-15 | 2019-02-15 | 北京遥感设备研究所 | A kind of Laser Detecting Set and detection method for high-speed maglev train tachometric survey |
| CN113639583A (en) * | 2020-04-27 | 2021-11-12 | 福建卓航科技有限公司 | Synchronous percussion performance detection device and detection method |
| CN113639583B (en) * | 2020-04-27 | 2022-11-29 | 福建卓航科技有限公司 | Synchronous percussion performance detection device and detection method |
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| CN113740558A (en) * | 2021-08-24 | 2021-12-03 | 红云红河烟草(集团)有限责任公司 | Filter stick transmitting and receiving speed on-line velometer |
| CN113740558B (en) * | 2021-08-24 | 2024-03-19 | 红云红河烟草(集团)有限责任公司 | Filter stick transmitting and receiving speed on-line velometer |
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| Publication number | Publication date |
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| CN108008143B (en) | 2023-09-05 |
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