CN102749470A

CN102749470A - Fragment velocity measuring device

Info

Publication number: CN102749470A
Application number: CN2012102293239A
Authority: CN
Inventors: 狄长安; 孔德仁; 易春联; 孟祥明; 王芳; 贾云飞; 商飞; 刘兵; 闵想
Original assignee: Nanjing University of Science and Technology
Current assignee: Nanjing University of Science and Technology
Priority date: 2012-07-03
Filing date: 2012-07-03
Publication date: 2012-10-24

Abstract

The invention discloses a fragment velocity measuring device. The fragment velocity measuring device comprises a first laser screen target and a second laser screen target, which are parallel arranged; both the first laser screen target and the second laser screen target are formed by two groups of laser screens which are vertical to each other in the same plane; a laser source is arranged at one side of each group of laser screens; and a receiver is arranged at the opposite other side of each group of laser screens. The accuracy is higher by adopting the device to measure the velocity of a fragment.

Description

A kind of fragmentation velocity measuring device

Technical field

The invention belongs to the velocity test field, particularly a kind of fragmentation velocity measuring device can be measured the speed of fragmentation more accurately.

Background technology

In the weaponry development and producing, fragmentation speed is the key parameter of test.In fragmentation velocity survey field by a series of testing tools and equipment comparatively commonly used be that zone-block device and tester are formed common velocity-measuring system; The zone-block device that generally use in present domestic target range is coil target, canopy of the heavens target and light curtain target, and they all are to adopt the non-contact testing principle to survey the moment of target excessively of fragmentation.Especially measure in the process of fragmentation speed in coil target and light curtain target method, accurately measuring distance and the time that bullet moves in two target surfaces is two key factors that accurately measure fragmentation speed.In the measuring process of reality, often with the distance of the horizontal bee-line between two target surfaces as the fragmentation operation.Like Fig. 2, have the fragmentation velocity measuring device now, comprise first light curtain target, second light curtain target of parallel placement; First light curtain target is made up of one group of light curtain, and second light curtain target is made up of two groups of light curtains, and every group of light curtain one side is lasing light emitter; Opposite side is a receiver relatively; First light curtain target is measured the time that fragmentation is injected, and second light curtain target is measured time and the point of impact that fragmentation penetrates, and horizontal range is divided by penetrating the speed of promptly thinking fragmentation with the mistiming of injecting between two light curtain targets.

Under the actual conditions, fragmentation can not fly along two target axis directions usually, so there are error in the actual distance and the horizontal range of fragmentation operation.There are error usually in the fragmentation speed and the true velocity that in this way record, and measuring accuracy is not high.

Summary of the invention

The object of the present invention is to provide a kind of fragmentation velocity measuring device, can accurately measure the speed of fragmentation, precision is high, good reliability.

The technical solution that realizes the object of the invention is: a kind of fragmentation velocity measuring device; First light curtain target, second light curtain target that comprise parallel placement, second light curtain target is made up of orthogonal two groups of light curtains in same plane, and every group of light curtain one side is lasing light emitter; Opposite side is a receiver relatively; Said first light curtain target also is made up of orthogonal two groups of light curtains in same plane, and every group of light curtain one side is lasing light emitter, and opposite side is a receiver relatively.

The present invention compared with prior art, its remarkable advantage: fragmentation velocity survey precision is high.Because this device can be measured the coordinate that fragmentation gets into first light curtain target and second light curtain target simultaneously, the horizontal range that the actual distance that flies with fragmentation replaces classic method to adopt makes more science, more accurate of speed calculation.

Below in conjunction with accompanying drawing the present invention is described in further detail.

Description of drawings

Fig. 1 is the structural representation of fragmentation velocity measuring device of the present invention.

Fig. 2 is the existing structural representation of measuring the fragmentation speed device.

Among the figure, 1 is first light curtain target, and 2 is second light curtain target, and 3 is photoelectric switching circuit, and 4 is data acquisition circuit, and 5 is host computer, and 11,21,31,41 is lasing light emitter, and 12,22,32,42 is receiver.

Embodiment

Like Fig. 1, a kind of fragmentation velocity measuring device of the present invention comprises first light curtain target 1, second light curtain target 2 of parallel placement; Second light curtain target 2 is made up of orthogonal two groups of light curtains in same plane; Every group of light curtain one side is lasing

light emitter

21,31, and opposite side is a

receiver

22,32 relatively, and said first light curtain target 1 also is made up of orthogonal two groups of light curtains in same plane; Every group of light curtain one side is lasing light emitter 11,41, and opposite side is a receiver 12,42 relatively.Coordinate when such two light curtain targets all can record fragmentation and fly over.

In fragmentation velocity measuring device as shown in Figure 1, the distance between two light curtain targets is S1.When fragmentation passed first light curtain target 1, light curtain target started timing T1, the coordinate of fragmentation in first light curtain target 1 be (x1, y1); When fragmentation passes second light curtain target 2; Second light curtain target 2 starts timing T2, the coordinate of fragmentation in second light curtain target 2 be (x2, y2); Because of fragmentation usually can be along two target axis directions flight, then on second light curtain target 2, to depart from the distance of two target axis be S2 to fragmentation:

The distance of fragmentation actual motion is S:

S = \sqrt{{S 1}^{2} + {S 2}^{2}};

And by the fragmentation that the time-measuring gauge measurement is come out be working time:

T＝T2-T1；

Then the actual speed of fragmentation operation is:

v = \frac{S}{T}

And as measuring by classic method, like Fig. 2, then fragmentation speed is:

v 1 = \frac{S 1}{T}

Usually < S is so < V, the speed that promptly records by classic method is less than actual speed for V1 for S1.Therefore, the velocity accuracy that the speed of measuring with apparatus of the present invention is measured than classic method is high.

Claims

1. fragmentation velocity measuring device comprises first light curtain target (1), second light curtain target (2) of parallel placement, and said second light curtain target (2) is made up of orthogonal two groups of light curtains in same plane; Said every group of light curtain one side is lasing light emitter (21,31), and opposite side is a receiver (22 relatively; 32); It is characterized in that: said first light curtain target (1) also by two groups in same plane orthogonal light curtain constitute, said every group of light curtain one side is lasing light emitter (11,41); Opposite side is receiver (12,42) relatively.