CN110702938A - Device and method for measuring initial speed of array gun barrel projectile by wedge-shaped light curtain array - Google Patents
Device and method for measuring initial speed of array gun barrel projectile by wedge-shaped light curtain array Download PDFInfo
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- CN110702938A CN110702938A CN201910991397.8A CN201910991397A CN110702938A CN 110702938 A CN110702938 A CN 110702938A CN 201910991397 A CN201910991397 A CN 201910991397A CN 110702938 A CN110702938 A CN 110702938A
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- 238000005259 measurement Methods 0.000 abstract description 11
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000010304 firing Methods 0.000 abstract 1
- 238000011161 development Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
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- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B35/00—Testing or checking of ammunition
- F42B35/02—Gauging, sorting, trimming or shortening cartridges or missiles
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Abstract
The invention discloses a device and a method for measuring the initial speed of an array gun barrel by a wedge-shaped light curtain array. The wedge-shaped light curtain array consists of two or more wedge-shaped light curtains, and each wedge-shaped light curtain consists of a light source and a photodiode receiving module. The two sets of same measuring devices are arranged at certain intervals, corresponding testers or signal acquisition devices are arranged, when the projectile successively passes through the two sets of measuring devices, the wedge-shaped light screens output a projectile passing screen signal, and the initial speed of the array gun barrel can be measured according to the zone interception speed measurement principle and the spatial position relation of the wedge-shaped light screen array. The invention has simple structure and convenient target distribution, and is suitable for the initial speed test of the simultaneous-firing continuous-shooting projectile of the array gun barrel.
Description
Technical Field
The invention belongs to the technical field of target range testing, mainly relates to measurement of initial velocity of a plurality of bullets when shooting at the same time by adopting a light curtain array technology, in particular to a device and a method for measuring the initial velocity of the bullets and identifying the bullet sequence when two-door or four-door gun array gun barrels fire at the same time, and particularly relates to a device and a method for measuring the initial velocity of the bullets of the array gun barrels by using a wedge-shaped light curtain array.
Background
The multi-shot gun or the array gun barrel weapon has high shooting speed, and the multi-shot can form a bullet screen in space, can effectively destroy an attacking missile or unmanned aerial vehicle group, and is key equipment of a ship-borne low-altitude defense system. The dynamic bullet screen parameters of the projectile, particularly the flight parameters (including speed, landing position, attitude and the like) of the projectile, are the key for directly evaluating the weapon system performance, and need to be measured in the process of demonstration, development, production, verification and the like of the weapon, and the measurement of the projectile flight parameters can effectively accelerate the development and development of the multi-barrel gun or array barrel weapon.
The prior measuring device and method for the flying speed of the projectile mainly comprise a coil target, a canopy target, a light curtain target, a linear array CCD, a high-speed photography speed measuring device and the like, wherein the coil target is the earliest non-contact measuring device, and the coil target can not be used for the flying speed of the projectile made of non-metal materials due to the fact that the coil target takes electromagnetic induction as a measuring principle, and is easy to be interfered by external electromagnetic waves, so that the stability and the reliability are poor; the sky screen target and the light screen target are two types of measuring devices which are widely used based on the photoelectric principle, measuring devices with various structures, such as a horizontal sky screen target, an elevation angle sky screen target, a four-light-screen light screen target, a six-light-screen light screen target and the like, have been developed at present, have simple structures, higher measuring precision and low cost, and have been successfully used for testing single shot shots; the linear array CCD and the high-speed shooting and speed measuring device have high measurement accuracy, but the device is expensive in cost and has high requirements on subsequent processing circuits. The speed measuring device provided above has been successfully used for testing the speed of the shot launched by the single-tube gun, but when a plurality of gun tubes are launched simultaneously, a plurality of shots are launched, and the existing device cannot complete the measurement because the existing device cannot distinguish more than two shots which simultaneously pass through the detection field of view, so that the speed measurement of the shot launched by the array gun tubes cannot be realized.
Disclosure of Invention
The invention provides a device and a method for measuring the initial speed of an array gun barrel by a wedge-shaped light curtain array, which aim to solve the problem that the conventional speed measuring device cannot measure the flight speeds of a plurality of bullets when an array gun barrel weapon is fired at the same time.
The utility model provides a device that wedge light curtain array measured array gun barrel initial velocity, includes wedge light curtain array, signal processing and enlargies module and connecting rod, the light curtain array comprises two or more wedge light curtains, and the wedge light curtain comprises light source and the photodiode receiving module more than two, the equal perpendicular setting of photodiode receiving module more than two sets up in the light path of light source, and every photodiode receiving module's perpendicular bisector passes through the light source position, and the visual field edge of each wedge light curtain that forms all is provided with a pair of column laser standard indicator, and the signal processing more than two corresponds a photodiode receiving module respectively with the module of enlargiing.
Furthermore, the number of the photodiode receiving modules 2 and the number of the signal processing and amplifying modules 3 are four respectively.
Further, the light source 1 is a linear laser.
The method for measuring the initial speed of the array gun barrel by the device comprises the following steps:
1) measuring the distance S between two sets of same devices;
2) when the array gun barrel projectile passes through the light curtain array areas of the two sets of devices, the first set of devices outputs the target passing signal t of the projectileA1、tB1、tC1、tD1…, the second set of devices outputs the passing target signal t of the projectileA2、tB2、tC2、tD2…
3) The flight speed of each projectile was calculated according to the following equation:
VA＝S/(tA2-tA1)
VB＝S/(tB2-tB1)
VC＝S/(tC2-tC1)
VD＝S/(tD2-tD1)
…。
compared with the prior art, the invention has the advantages that:
1. the speed measuring light curtain is a light curtain array, the light curtain array is composed of a light source and two or more photodiode receiving modules, each photodiode receiving module corresponds to an independent signal amplification module, namely, a plurality of wedge-shaped light curtains are integrated, the space area division of a detection view field of the measuring device is realized, the time signals when a plurality of projectile signals pass through a target simultaneously are further distinguished, two sets of array gun tube initial speed measuring devices are arranged in front and at the back to form a zone-cut speed measuring device, and the speed measurement when a plurality of projectiles pass through the target simultaneously is easily realized.
2. Because the light collecting screens are arrayed integrally, the measuring device has simple structure and convenient target distribution during field test.
3. The measuring device can be used as a signal trigger device when being used independently, so that the device has various functions, multiple purposes, flexible combination and convenient assembly.
Drawings
FIG. 1 is a schematic view of a four-door gun barrel;
FIG. 2 is a schematic illustration of the composition of a single wedge-shaped light curtain;
FIG. 3 is a schematic view of a wedge-shaped four-light-curtain array measurement 2X 2 array gun barrel;
FIG. 4 is a schematic external dimension diagram of a wedge-shaped four-light-curtain array measuring device;
FIG. 5 is a schematic view of a wedge-shaped four-light-curtain array measuring 1X 4 array gun barrel;
FIG. 6 is a schematic view of a wedge-shaped two-light-curtain array measuring 1X 2 array gun barrel;
in the figure, 1-light source, 2-photodiode receiving module, 3-signal processing and amplifying module, 4-connecting rod, 5-light source structure frame, 6-receiving device structure frame and 7 laser standard indicator.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Example 1:
the invention relates to a device for measuring the initial speed of an array gun barrel by a wedge-shaped light curtain array. The applied object array gun barrel is a 2 x 2 launching device, and a schematic diagram of the position of the gun barrel is shown in fig. 1. As shown in fig. 3, the measuring device is composed of a wedge-shaped light curtain array, a signal processing and amplifying module 3 and a connecting rod 4, the wedge-shaped light curtain array is specifically a wedge-shaped four-light curtain array, each wedge-shaped light curtain is composed of a light source 1 and a photodiode receiving module 2, or a plurality of light curtains share one light source 1, and the photodiode receiving module 2 is perpendicular to the central line of the light source 1, as shown in fig. 2. The light source 1 is arranged on a light source structure frame 5, the photodiode module 2 and the signal processing module 3 are arranged in a receiving device structure frame 6, the light source structure frame 5 and the receiving device structure frame 6 are connected through a connecting rod 4, and two sets of the same measuring devices are arranged at a certain distance to form a zone-section speed measuring device.
Example 2:
the measurement setup was as in example 1, assuming the angle β between the wedge-shaped light sheets as shown in FIG. 41＝β2＝β3＝β4β, the spatial position of the array gun barrel corresponds to each light curtain in the wedge-shaped four-light-curtain array, the included angle between the corresponding position of the gun barrel a and the light source is γ, the vertical distance from the light source 1 is H, the distance from the Y axis of the light source 1 is x, and the distance between the light source 1 and the photo-electricity receiving device is R, as shown in fig. 4. Then there are:
as can be seen from the graph, 0< γ < β, where β is the maximum critical value of γ, then:
when L is constant, x is at a maximum value of
Namely, it is
That is, the smaller R, the larger γ; the larger R, the smaller gamma; when R is a fixed value, the smaller the | EF | is, the smaller the L is, and the smaller the gamma is; the larger | EF | is, the larger L is, and the larger γ is.
The magnitude of gamma determines the lateral spacing of the measurable array barrels.
According to the spatial position distribution relationship of the array gun barrels, the wedge-shaped four-light-curtain array measuring device described in embodiment 1 can be used for measuring the initial projectile velocity of a 1 × 4 array gun barrel weapon, as shown in fig. 5.
Example 3:
in the measuring device as in embodiment 1, the columnar laser standard indicators 7 are respectively installed on two sides of the light source structure frame 5 and the receiving device structure frame 6, and when the measuring device is installed, the installation accuracy is ensured according to the superposition of the light beams of the corresponding laser standard indicators.
The two edges of the field of view of each wedge-shaped light curtain may be fitted with columnar lasers to demarcate the other light curtain, and in use, to align the barrel so as to distinguish which region is in use.
Example 4:
as shown in fig. 6, the wedge-shaped light curtain array is specifically a wedge-shaped two-light curtain array measuring device, and can be used for measuring the initial projectile velocity of a 1 × 2 array gun barrel weapon.
Example 5:
the method for measuring the initial speed of the array gun barrel by the various structural devices comprises the following steps:
two sets of measuring device are put apart certain interval apart from, are equipped with corresponding time measurement appearance or signal acquisition device, and when the projectile passed measuring device, the target signal of crossing of corresponding wedge light curtain output projectile, according to the district's principle of testing the speed of intercepting, can realize array gun barrel initial velocity's measurement, concrete step includes:
measuring the distance S between two sets of wedge-shaped light curtain array measuring devices;
step two, after the array gun barrel projectile passes through the wedge-shaped light curtain array areas of the two sets of measuring devices, the signal amplification and processing module processes and amplifies the acquired time signals and outputs the target passing time signals of the projectile: the first set of measuring device outputs the passing target signal t of the projectileA1、tB1、tC1、tD1…, the second set of measuring device outputs the passing target signal t of the projectileA2、tB2、tC2、tD2…
Step three, calculating the flight speed of each projectile according to the following formula:
VA＝S/(tA2-tA1)
VB＝S/(tB2-tB1)
VC＝S/(tC2-tC1)
VD＝S/(tD2-tD1)。
it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (4)
1. The utility model provides a wedge light curtain array measures device of array gun tube initial velocity, includes wedge light curtain array, signal processing and amplifier module (3) and connecting rod (4), the light curtain array comprises two or more wedge light curtains, and the wedge light curtain comprises light source ()1 and more than two photodiode receiving module ()2, photodiode receiving module (2) more than two all set up perpendicularly in the light path of light source (1), and the perpendicular bisector of every photodiode receiving module (2) passes through light source (1) position, and the visual field edge of each wedge light curtain that forms all is provided with a pair of column laser standard indicator, and signal processing more than two corresponds photodiode receiving module (2) respectively with amplifier module (3).
2. The device for measuring the initial velocity of the array gun barrel by the wedge-shaped light curtain array according to claim 1, wherein the number of the photodiode receiving modules (2) and the number of the signal processing and amplifying modules (3) are four respectively.
3. The device for measuring the initial velocity of the array gun barrel by the wedge-shaped light curtain array according to the claim 1 or 2, characterized in that the light source (1) is a linear laser.
4. A method of measuring the initial velocity of an array gun barrel by the apparatus according to claim 1, comprising the steps of:
1) measuring the distance S between two sets of same devices;
2) when the array gun barrel projectile passes through the light curtain array areas of the two sets of devices, the first set of devices outputs the target passing signal t of the projectileA1、tB1、tC1、tD1…, the second set of devices outputs the passing target signal t of the projectileA2、tB2、tC2、tD2…
3) The flight speed of each projectile was calculated according to the following equation:
VA＝S/(tA2-tA1)
VB＝S/(tB2-tB1)
VC＝S/(tC2-tC1)
VD＝S/(tD2-tD1)
…。
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