CN2303297Y

CN2303297Y - Portable non-target type laser instrument for measuring speed of bullet

Info

Publication number: CN2303297Y
Application number: CN 97236300
Authority: CN
Inventors: 贺安之; 吕爱民
Original assignee: Nanjing University of Science and Technology
Current assignee: Nanjing University of Science and Technology
Priority date: 1997-06-12
Filing date: 1997-06-12
Publication date: 1999-01-06
Anticipated expiration: 2007-06-12

Abstract

The utility model discloses a portable laser speed measuring instrument without targets for firearms. The utility model is characterized in that an area cutting device is composed of an infrared semiconductor laser transmitter and an infrared semiconductor laser receiver, and the treatment and the display of the calculation of speeds of bullets can be completed by an input processing unit for start signals and stop signals, a bullet length setting and function selecting unit, a singlechip, a display, etc. by using two signals when the tails and the heads of the bullets pass through the area cutting device. The utility model reduces errors brought by the measure of target distances in the prior art. The utility model is a novel speed measuring instrument without targets, can be carried conveniently, is energized by batteries, can not be limited by places, environments and weather and is especially suitable for measuring speeds in fields and other places without AC power supplies.

Description

Portable no target laser firearms knotmeter

The utility model relates to the firearms velocity measuring device, particularly a kind of portable no target laser firearms knotmeter that is applicable to field work.

The speed of bullet is one of main parameter of cannon, ammunition, trajectory data.At present, the method for initial velocity measurement both at home and abroad is to place two identical zone-block devices on the certain distance of gun muzzle firing direction, gets bullet by distance between this zone-block device and used time, obtains the average velocity of trajectory phase, is converted to muzzle velocity again.Present stage domestic and international employed zone-block device.As coil target, canopy of the heavens target, net target.Coil target is a kind of contactless zone-block device with electromagnetic induction principle work, when the magnet bullet passes through coil target, causes the variation of fluxoid in the coil target, produces induction electromotive force, thereby makes coil target produce begun signal and termination signal; Canopy of the heavens target also is a kind of contactless zone-block device, main element is a photoelectric tube, when bullet passes the space of target top, the canopy of the heavens, partly or wholly light is covered, make illumination produce transient change, thereby make the electric current of circuit also produce instantaneous variation, promptly can be used as the signal that makes the time-measuring gauge starting and stop; The net target is to utilize tinsel coiling on a square frame to form, and when bullet cuts off tinsel during by the net target, produces a voltage jump signal; More than three kinds of targets all must be equipped with time-measuring gauge when testing the speed, signal cable, AC power and other utility appliance etc., when shooting at the elevation angle, coil target, net target all need tall and big target holder, workload is big, the range measuring error is also big, and these three kinds of zone-block devices also come with some shortcomings separately, exists the uneven and range error of distribution parameter, canopy of the heavens target to the environmental requirement height as coil target, limited by Changes in weather, cost is high, net target troublesome poeration, and the range measuring accuracy is not high.Simultaneously, higher when above-mentioned three kinds of zone-block devices test the speed to place and technician's technical requirement, be unfavorable for especially in the open air and do not have working under the condition of AC power,

The purpose of this utility model is to provide a kind of field work, simple to operate, cost is low, precision is high portable no target laser firearms knotmeter of being applicable to.

The purpose of this utility model is achieved through the following technical solutions.Portable no target laser firearms knotmeter, it comprises zone-block device, single-chip microcomputer, display, it is characterized in that also having long two input ends that are connected on single-chip microcomputer with the function selecting unit respectively that are provided with of an initial termination signal input processing unit and bullet, the output termination display of single-chip microcomputer, also can connect printer as required, zone-block device is by gun muzzle bracing frame, infrared semiconductor laser transmitter and receiver are formed, infrared semiconductor laser transmitter and receiver are corresponding respectively to be installed on the perpendicular line of gun muzzle bracing frame axis, and the output of receiver connects the input of initial termination signal input processing unit.It is zone-block device that the utility model adopts less infrared semiconductor laser and the receiver of volume, powered battery, be installed on gun muzzle by bracing frame during use, when bullet bullet process laser beam, produce a start signal and give initial, termination signal input processing unit, projectile tail by the time produce a termination signal again, noting at this moment, bullet passes through the used time of laser beam, bullet length according to prior setting, can calculate the speed of bullet by single-chip microcomputer in real time, show when the speed of sending out in real time by display again.In the zone-block device of infrared semiconductor laser and receiver composition, refraction problems when in different medium, propagating for consideration light, the utility model takes to be provided with lens on the input path of receiver, make receiver be positioned at the focus place of lens, all received in the receiver with the light that guarantees generation refraction in medium.

The utility model compared with prior art, its significant good effect is: easy to carry, need not be equipped with engineering truck and special-purpose workplace, be not subjected to the restriction of place, environment and weather, powered battery, reduced the error that the manual measurement range is brought, workload is existing 1/10, instruments weight is existing 1/100, instrument and test fee are 1/40～80 of prior art, be fit to target range, base, trajectory station, the military region, munitions factory, particularly field army testing the speed of real-time live shell on the spot, also be applicable to the velocity survey of bullets such as civilian air gun.

Concrete body structure of the present utility model is specifically provided by the following drawings and embodiment.

Fig. 1 is the zone-block device structural representation according to portable no target laser firearms knotmeter described in the utility model.

Fig. 2 is the principle of work synoptic diagram of portable no target laser firearms knotmeter.

The used zone-block device of 85mm big gun with reference to the accompanying drawings is an example below, and the utility model is described in further details.

Referring to Fig. 1, the zone-block device of making according to the utility model by infrared semiconductor laser 2, receiver 3, gun muzzle bracing frame 1, form, gun muzzle bracing frame 1 adopts No. 46 steel to make, on the step of the vertical direction of bracing frame 1 axis, have corresponding through hole, infrared semiconductor laser 2 and receiver 3 are installed in the through hole respectively, for guaranteeing that the refract light of laser after different medium is propagated accurately is received device 3 and receives, the lens 4 of Φ 10mm are set in the through hole that receiver 3 is installed, and receiver 3 is positioned at the focus place of lens 4.Gun muzzle bracing frame passes through three screw retention in use on the gun muzzle on the gun tube 11.Single-chip microcomputer 7 in this knotmeter is selected the MCS-51 single-chip microcomputer for use, the long setting with function selecting unit 6 of initial termination signal input processing unit 5 and bullet is the standard element, be connected on two input interfaces of single-chip microcomputer 7 respectively, the output of receiver 3 connects the input of initial termination signal input processing unit 5, and laser instrument 2 used power supplys adopt two joints to do electricity ground 9 for No. 5.This knotmeter as required can an external LCD 8 and printer 10.

Claims

1, a kind of portable no target laser firearms knotmeter, it comprises zone-block device, single-chip microcomputer [7] and display [8], it is characterized in that an initial termination signal input processing unit [5] and long two input ends that are connected on single-chip microcomputer [7] with function selecting unit [6] respectively that are provided with of bullet in addition; Zone-block device is made up of gun muzzle bracing frame [1], infrared semiconductor laser transmitter [2] and receptacle [3], infrared semiconductor laser transmitter [2] and receiver [3] correspondence respectively are installed on the perpendicular line of gun muzzle bracing frame [1] axis, and the output of receiver [3] connects the input of initial termination signal input processing unit [5].

2, portable no target laser firearms knotmeter according to claim 1 is characterized in that also being provided with lens [4] on the input path of laser pickoff [3], and laser pickoff [3] is positioned at the focus place of lens [4].