CN104020312A - Laser screen target tachymeter and ballistic trajectory capturing method - Google Patents
Laser screen target tachymeter and ballistic trajectory capturing method Download PDFInfo
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- CN104020312A CN104020312A CN201410263621.9A CN201410263621A CN104020312A CN 104020312 A CN104020312 A CN 104020312A CN 201410263621 A CN201410263621 A CN 201410263621A CN 104020312 A CN104020312 A CN 104020312A
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Abstract
The invention relates to a laser screen target tachymeter and a ballistic trajectory capturing method, wherein the laser screen target tachymeter and the ballistic trajectory capturing method are applied to velocity measurement of a bullet. The laser screen target tachymeter is characterized by comprising a microprocessor unit, a display touch screen unit for display and operation, an X-axis laser screen transmitting unit, a laser receiving unit of an X-axis receiving laser screen, a Y-axis laser screen transmitting unit, a laser receiving unit of a Y-axis receiving laser screen and a signal processing circuit unit. The ballistic trajectory movement locus of the bullet can be traced out in the space through multiple points while velocity is measured, and compared with a ballistic trajectory measuring method in the prior art, the ballistic trajectory capturing method is low in cost, simple in principle, high in efficiency, free of influences of visibility of external environment and visual in measuring result.
Description
Technical field
The present invention relates to a kind of method that light curtain knotmeter that bullet tests the speed and projectile's path are caught that is applied to, the invention belongs to conventional Weapon shooting range measurment technical field.
Background technology
At present, the mode that light curtain tests the speed adopts the mode of infrared transmitting tube and receiving tube to design more, the receiving tube of each correspondence must be corresponding with an infrared transmitting tube, whole system must ensure strict the aiming at power valve of each receiving tube, system can enter test mode, but because Infrared is invisible light, human eye cannot be seen, only have the specific installation of employing just can observe, and infrared receiving tube is that the infrared directivity of perception is very strong, if infrared transmitting tube is because the distortion on physics mounting structure, we cannot carry out artificial correction not by means of any professional equipment in the situation that, make it have the hidden danger that maintenance difficulties is large, when infrared receiving tube quantity is few, can carry out above mounting means, if but quantity does not make the number of the light beam of light curtain reduce at most yet, and this type of light curtain only has row's light beam in one direction, the detection density of light curtain is sparse, cannot measure the little bullet of caliber, can only in the allowed band of light curtain beam density, carry out conditional measurement, even if this also makes to reach certain rank at bullet caliber and also has the risk that Lou bullet detects, test effect is had a greatly reduced quality.
When bullet is tested the speed, experimenter can investigate the combination property of ejecting gun or bullet, such as the trajectory to bullet is analyzed, thus indirect its performance is assessed.But the analysis to projectile's path at present, to use 3D Image-forming instrument to carry out image processing mostly, or use the professional photoelectricity equipment such as high-speed camera to analyze, this kind equipment is in projectile flight, to obtain whole dynamic process substantially, the high-definition image capturing is carried out to high-resolution amplification, then by graphical analysis after treatment, draw the trajectory path of bullet.This type of equipment price is very expensive, and support price is equally very high, and the photoelectricity equipment or even the foreign-made that have, and expensive being not suitable for popularized, and after-sales service difficulty is large.This photoelectricity equipment need to gather a large amount of high definition pictures, therefore extraneous environment becomes the key factor of impact, under complicated weather condition, cannot normally use, as dense fog and thick weather have a direct impact measuring, the size of extraneous environment visibility directly affects accuracy and the reliability of its test, thereby has certain limitation.
Summary of the invention
Problem to be solved by this invention is exactly for the existing defect of prior art, the laser that provides a kind of bullet the to test the speed method that light curtain knotmeter and projectile's path are caught that interweaves, apparatus structure is simple, easy to operate, cost is low, detection efficiency is high, form the visible laser light curtain that interweaves of human eye by high brightness laser diode, catch accurately by the bullet of light curtain.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of laser light curtain knotmeter, comprises that demonstration touch screen unit, X-axis laser light curtain transmitter unit, the X-axis of microprocessor unit, demonstration and operation receive laser pick-off unit, the signal processing circuit unit of the laser pick-off unit of laser light curtain, Y-axis laser light curtain transmitter unit, Y-axis reception laser light curtain.
Described demonstration touch screen unit, is the high resolving power TFT color line screen of tangible operation, and for data mode and the test result of display system, touch screen button has above replaced physical button to carry out operation setting to system, is connected with described microprocessor unit.
Described X-axis laser light curtain transmitter unit and Y-axis laser light curtain transmitter unit, to be formed by the laser diode emitters of high brightness, be used to form the laser light curtain of visibility and high directivity, described X-axis laser light curtain transmitter unit and described Y-axis laser pick-off cellular installation position are that end points place is orthogonal.
Described X-axis receives the laser pick-off unit of laser light curtain and the laser pick-off unit of Y-axis reception laser light curtain, formed by multiple photodiode line spread, for receiving the laser of described laser light curtain transmitter unit, the variation that the photodiode of described laser pick-off unit can perceived light flux.Described X-axis receives the receiving element of laser light curtain and the laser pick-off cellular installation position of Y-axis reception laser light curtain is that end points place is orthogonal.The state aware of described photodiode is completely independently, and their state can be processed by described signal processing unit, then carries out calculation process to described microprocessor unit electric signal.
Described signal processing circuit unit, it is Photoelectric Signal Processing unit, the variation of luminous flux can be converted into electric signal, process to microprocessor unit by multichannel phase and a useful signal of the final output of circuit, also the state of described multiple photodiodes can be carried out and turn string manipulation simultaneously, be connected with the serial ports of described microprocessor unit, described signal processing circuit unit makes described microprocessor in the situation that of low hardware spending, effectively process the electric signal of each photodiode.
For solving the problems of the technologies described above, the invention allows for a kind of method that projectile's path is caught, it is characterized in that comprising the steps:
1,, by the distance values between each light curtain target of touch screen key-press input of demonstration touch screen unit, obtained the coordinate figure of Z axis.
2, microprocessor unit turns the string of described signal processing unit and the signal of signal output part gathers.
3, the feature of signal is analyzed, if the photodiode array of X coordinate axis is taking 8 numbers as elementary cell, if the data that obtain are OXF7, corresponding binary digit is 1,111 0111, the photodiode of known the 4th is truncated, because the spacing of the arrangement of diode equates, can obtain the actual physical location of the photodiode that bullet blocks.In like manner, the signal of the photodiode array in Y-axis resolves in the same way, and is calculated the off-set value of bullet position in space of this operation by equidistant formula.And the coordinate figure of Z axis is the spacing value of installing between each light curtain target.
4,, in the data acquisition system (DAS) of multiple light curtains composition, the numerical quantities of the deviation post of operation bullet can show that touch screen unit obtains testing after the value of speed.Experimenter is showing that touch screen unit obtains these valid data very intuitively, then these values being input to computing machine Matlab software processes, this software can form a three-dimensional curve coordinate diagram by these values, just can describe very intuitively the variation of projectile flight track by three-dimensional coordinate point.
Beneficial effect of the present invention, the present invention compared with prior art technical advantage of the present invention is:
1. adopt interweave laser light curtain and photoelectric signal processing circuit, accuracy of detection is high, apparatus structure is simple, cost is low, antijamming capability is strong, simple to operate.
2. can regulate according to the distance that need to expand the interval between light curtain target to the number of light curtain target of Surveying Actual Precision.Can survey many group speed datas and analyze, can effectively dwindle experimental error;
3. in testing the speed, can depict the ballistic movement track of bullet in space by multiple spot, trajectory measurement method compared with prior art, is a kind of low cost, and principle is simple, and efficiency is high.Test the speed and can carry out with ballistic capture simultaneously, and be not subject to the impact of external environment visibility, the trajectory catching method that measurement result is visual in image.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described, in accompanying drawing:
Fig. 1 is light curtain target structural representation of the present invention;
The structural representation that Fig. 2 has bullet to pass while being light curtain target work of the present invention;
Fig. 3 is the assembling section of light curtain target of the present invention;
Fig. 4 is trajectory catching method schematic diagram of the present invention;
Fig. 5 A is the signal amplification circuit schematic diagram of signal processing unit of the present invention;
Fig. 5 B is the signal comparing unit schematic diagram of signal processing unit of the present invention;
Fig. 5 C is signal processing unit connecting structure for electrical equipment schematic diagram of the present invention;
The schematic flow sheet of Fig. 6 whole test process of the present invention;
In figure, 100---light curtain target, 101---X-axis light curtain receiving trap, 102---Y-axis light curtain receiving trap, 103---X-axis light curtain emitter, 104---Y-axis light curtain emitter, 201---the photodiode being truncated in X-axis, 202---the photodiode being truncated in Y-axis, 203---bullet, 300---light curtain tests the speed and trajectory capture systems, 301---the trajectory line of flight, 302---alignment, 501---scale operation amplifying circuit, 502---voltage follower circuit, 503---comparator circuit, 504---and turn serializer circuit unit, 505---microprocessor unit, 506---show touch unit, 507---phase and circuit unit.
Embodiment
As shown in Figure 1, light curtain target 100 of the present invention comprises X-axis light curtain receiving trap 101, Y-axis light curtain receiving trap 102, X-axis light curtain emitter 103, Y-axis light curtain emitter 104, the light curtain region interweaving that the emitter in X-axis and Y-axis and receiving trap form, when the light beam forming is effectively blocked, system can be identified this signal and process, and system can resist the interference such as mosquito and flame in processing.
Light curtain target 100 is-individual photo-translating system that the function that circuit is realized comprises signal amplification, subsequent treatment and man-machine interface operation control.Photodiode array is connected with preamplifying circuit, through the further amplification of intergrade amplifying circuit, is input to trigger circuit and analog output circuit. and trigger circuit transfer simulating signal to digital signal.Shown in Fig. 2, be in the time that operation bullet 203 passes light curtain target 100, the photodiode 202 being truncated in the photodiode 201 being truncated in X-axis and Y-axis.As shown in Figure 4, its trajectory is caught schematic diagram, when the truncated signal S0 of the photodiode 201 being truncated in the-individual light curtain (as the I target in Fig. 3) X-axis is to signal processing circuit unit, the signal S0 of this sudden change is as an AC signal processing, as the signal amplification circuit unit of Fig. 5 A, adopt the instrument amplifier of low noise and high conjugated analoging systeming ratio to amplify, when faint signal arrives scale operation amplifying circuit 501 by coupling capacitance, the homophase that ratio is as required carried out signal amplifies, in the time that signal is amplified to certain degree, connect next stage voltage follower circuit 502 by filtering circuit, its circuit as shown in Figure 5 B, the input impedance of this circuit is high, and output impedance is low, be conducive to isolate the interference of subsequent process circuit to prime.When the processing of these circuit of the useful signal S0 of simulating signal process, be output as T0 signal to comparator circuit 503, simulating signal is changed into digital signal Q0, if in the time that the signal of output is greater than the threshold voltage of comparator circuit 503 end of oppisite phase, Q0 is output as high level signal; On the contrary, in the time that the signal of output is less than the threshold voltage of comparator circuit 503 end of oppisite phase, Q0 is output as low level signal.Output signal Qn is as the photoelectric conversion final output signal of each photodiode.
Use light curtain target 100 carry out velocity test time, as shown in Figure 3, the spacing distance D of each light curtain target 100
n-1, spacing distance D
n-1can need to increase and decrease according to reality test with the number of light curtain target 100.When bullet is when the first target surface, the photodiode sensing unit on it starts, record time T 1n, T1 (n+1) that bullet penetrates target area, In the time that bullet passes the second target surface, photodiode sensing unit on it starts, record time T 2n, T2 (n+1) that bullet passes target area ... the flight time of bullet from the first target surface to the second target surface be corresponding sensing unit mistiming Δ t1=T2n-T1n, Δ t2=T2 (n+1)-T1 (n+1) ..., by V
n=D
n/ Δ t
n(number of n position light curtain target), can calculate speed between two sections, light curtain and the average velocity of whole process.
The variation that system collects luminous flux by light curtain target 100 changes into after electric signal, need to further process, process as above is exactly the basic procedure of the work of testing the speed of a light curtain 100, this test macro is made up of multiple light curtain targets 100, as shown in Figure 3, the light curtain of composition tests the speed and trajectory capture systems 300, catches shown in schematic diagram in conjunction with the trajectory of Fig. 4, and the step of concrete catching method is as follows:
1, when bullet tests the speed through curtain and when trajectory capture systems 300, alignment 302 is levels, bullet by the trajectory line of flight 301 through light curtain group, the photodiode blocking as shown in Figure 4, because the state of each photodiode is the Q independently obtaining
n, taking first light curtain target 100 as example, when the photodiode 201 being truncated in X-axis is the 7th, output signal position Q
x7=0; The photodiode 202 being truncated in corresponding Y-axis is the 9th, output signal position Q
y9=0.These signals be input to and turn serializer circuit unit 504, under low hardware spending, being input to microprocessor unit 505 and processing.
2,, in the processing of microprocessor unit 505, as shown in Figure 4, because the distance of photodiode is to be fixed as d, by formula 1=n*d, wherein, n is the numbering of the diode that is truncated to the Method And Principle of use, 1 biased distance of moving.For example, when No. 9 photodiodes in No. 7 photodiodes and Y-axis in X-axis are truncated, the spacing d=4mm of photodiode, the offset distance in X-axis is 28mm, offset distance in Y-axis is 36mm, and the coordinate of Z axis is the spacing distance between light curtain target.
3, bullet test the speed through curtain and trajectory capture systems 300 after, each light curtain target 100 on diverse location has obtained the value of the skew of bullet 203, finally carries out data processing, is showing the off-set value that can read X-axis and Y-axis coordinate in touch unit 506.Experimenter can analyze the feature of these values, and can use Matlab software to carry out the drafting of three-dimensional plot target.Complete trajectory by above several steps and catch and the function of display offset value, make the understanding correlated performance of operator's quicklook.
Reference table 1 is the data analysis figure of above-mentioned trajectory catching method embodiment:
What in table, use is that diameter is 18.4mm, weight is that the rubber bullet pneumatic gun of 25 grams is shot, because the windage of rubber bullet is larger, wind direction and the humidity etc. of test environment is all influence factor, in flight course, the amplitude of its trajectory skew is larger, and the flying distance of rubber bullet is probably 100 meters of left and right.Bullet test the speed through curtain and trajectory capture systems 300 in, taking each light curtain target 100 interval, 5 meters as unit, and ten light curtains are installed successively, surveys respectively the speed of each section and catches the deviation post of bullet.
Table 1
Above-described embodiment is only the preferred embodiments of the invention, and those skilled in the art can make according to the present invention various changes and distortion, only otherwise depart from spirit of the present invention, all should belong to the defined scope of claims of the present invention.
Claims (6)
1. a laser light curtain knotmeter, is characterized in that comprising that demonstration touch screen unit, X-axis laser light curtain transmitter unit, the X-axis of microprocessor unit, demonstration and operation receive laser pick-off unit, the signal processing circuit unit of the laser pick-off unit of laser light curtain, Y-axis laser light curtain transmitter unit, Y-axis reception laser light curtain.
2. laser light curtain knotmeter according to claim 1, is characterized in that: described demonstration touch unit is the high resolving power TFT color line screen of tangible operation, is connected with described microprocessor unit.
3. laser light curtain knotmeter according to claim 1, it is characterized in that: described X-axis laser light curtain transmitter unit and Y-axis laser light curtain transmitter unit, to be formed by the laser diode emitters of high brightness, be used to form the laser light curtain of visibility and high directivity, described X-axis laser light curtain transmitter unit and described Y-axis laser pick-off cellular installation position are that end points place is orthogonal.
4. laser light curtain knotmeter according to claim 3, is characterized in that: described X-axis receives the laser pick-off unit of laser light curtain and the laser pick-off unit of Y-axis reception laser light curtain, is made up of multiple photodiode line spread.Described X-axis receives the receiving element of laser light curtain and the laser pick-off cellular installation position of Y-axis reception laser light curtain is that end points place is orthogonal.
5. the signal processing circuit unit described in, it is Photoelectric Signal Processing unit, the variation of luminous flux can be converted into electric signal, process to microprocessor unit by multichannel phase and a useful signal of the final output of circuit, also the state of described multiple photodiodes can be carried out and turn string manipulation simultaneously, be connected with the serial ports of described microprocessor unit, described signal processing circuit unit makes described microprocessor in the situation that of low hardware spending, effectively process the electric signal of each photodiode.
6. the method that projectile's path is caught, is characterized in that comprising the steps:
1,, by the distance values between each light curtain target of touch screen key-press input of demonstration touch screen unit, obtained the coordinate figure of Z axis.
2, microprocessor unit turns the string of described signal processing unit and the signal of signal output part gathers.
3, the feature of signal is analyzed, if the photodiode array of X coordinate axis is taking 8 numbers as elementary cell, if the data that obtain are OXF7, corresponding binary digit is 1,111 0111, the photodiode of known the 4th is truncated, because the spacing of the arrangement of diode equates, can obtain the actual physical location of the photodiode that bullet blocks.In like manner, the signal of the photodiode array in Y-axis resolves in the same way, and is calculated the off-set value of bullet position in space of this operation by equidistant formula.And the coordinate figure of Z axis is the spacing value of installing between each light curtain target.
4,, in the data acquisition system (DAS) of multiple light curtains composition, the numerical quantities of the deviation post of operation bullet can show that touch screen unit obtains testing after the value of speed.Experimenter is showing that touch screen unit obtains these valid data very intuitively, then these values being input to computing machine Matlab software processes, this software can form a three-dimensional curve coordinate diagram by these values, just can describe very intuitively the variation of projectile flight track by three-dimensional coordinate point.
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| CN104776969A (en) * | 2015-04-20 | 2015-07-15 | 杨露 | Photosensitive aeration target |
| CN105180721A (en) * | 2015-08-11 | 2015-12-23 | 中国船舶重工集团公司第七0九研究所 | Automatic target scoring and speed measuring device and positioning and speed measuring method thereof |
| CN106597003A (en) * | 2016-11-30 | 2017-04-26 | 西北工业大学 | Method for measuring ultrasonic bullet flight track via shock waves |
| CN107064543A (en) * | 2016-12-30 | 2017-08-18 | 南京理工大学 | Muzzle velocity measurement apparatus based on X-ray |
| CN109253661A (en) * | 2018-10-30 | 2019-01-22 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of airbound target detection target assembly and detection method |
| CN110579179A (en) * | 2019-10-28 | 2019-12-17 | 贵州电网有限责任公司 | Infrared monitoring device and deformation detection method for information machine room floor structure deformation |
| CN110702938A (en) * | 2019-10-18 | 2020-01-17 | 西安工业大学 | Device and method for measuring initial speed of array gun barrel projectile by wedge-shaped light curtain array |
| CN111024978A (en) * | 2019-11-28 | 2020-04-17 | 内蒙古北方重工业集团有限公司 | Light curtain target auxiliary measuring device and using method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104776969A (en) * | 2015-04-20 | 2015-07-15 | 杨露 | Photosensitive aeration target |
| CN105180721A (en) * | 2015-08-11 | 2015-12-23 | 中国船舶重工集团公司第七0九研究所 | Automatic target scoring and speed measuring device and positioning and speed measuring method thereof |
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| CN109253661A (en) * | 2018-10-30 | 2019-01-22 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of airbound target detection target assembly and detection method |
| CN110702938B (en) * | 2019-10-18 | 2022-05-20 | 西安工业大学 | Device and method for measuring initial speed of array gun barrel projectile by wedge-shaped light curtain array |
| CN110702938A (en) * | 2019-10-18 | 2020-01-17 | 西安工业大学 | Device and method for measuring initial speed of array gun barrel projectile by wedge-shaped light curtain array |
| CN110579179A (en) * | 2019-10-28 | 2019-12-17 | 贵州电网有限责任公司 | Infrared monitoring device and deformation detection method for information machine room floor structure deformation |
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| CN111024978B (en) * | 2019-11-28 | 2022-08-23 | 内蒙古北方重工业集团有限公司 | Light curtain target auxiliary measuring device and using method thereof |
| CN111578835A (en) * | 2020-04-27 | 2020-08-25 | 南京航空航天大学 | Bird body motion track recognition and test device and method based on multilayer sheet light |
| CN111397536A (en) * | 2020-05-20 | 2020-07-10 | 西北核技术研究院 | Three-dimensional contour measuring method for penetration bullet hole of large-size reinforced concrete target plate |
| CN111397536B (en) * | 2020-05-20 | 2021-05-04 | 西北核技术研究院 | Three-dimensional contour measuring method for penetration bullet hole of large-size reinforced concrete target plate |
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Application publication date: 20140903 |