CN110412308B

CN110412308B - LED artificial light source device for backdrop target

Info

Publication number: CN110412308B
Application number: CN201910665090.9A
Authority: CN
Inventors: 冯斌; 史元元; 辛彬; 宋玉贵; 褚渊博
Original assignee: Xian Technological University
Current assignee: Xian Technological University
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2021-07-02
Anticipated expiration: 2039-07-23
Also published as: CN110412308A

Abstract

The invention provides an LED artificial light source device for a sky screen target, which comprises a shell, wherein the shell is composed of a plurality of groups of fixed plates, a light homogenizing plate and a plurality of groups of sequentially connected LED light source units are arranged in the shell, each LED light source unit comprises a light source bottom plate and an LED lamp array arranged on the light source bottom plate, the plurality of groups of sequentially connected LED light source units are arranged on the same central axis, the LED light source units are provided with five groups, the density of two groups of LED lamp arrays on the two sides is the largest, the density of two groups of LED lamp arrays on the inner side is the second, the density of one group of LED lamp arrays on the center is the smallest, and the number of the lamp beads of the five groups of LED lamp arrays is symmetrical; the artificial light source provided by the invention enables the light emitted by the light source to be matched with the view field of the backdrop target by designing the number and the structure of the light source array, so that the problem of inconsistent detection sensitivity at the same height of the backdrop is solved, and the measurement result is more reliable.

Description

LED artificial light source device for backdrop target

Technical Field

The invention relates to the technical field of target range testing, in particular to an LED artificial light source device for a backdrop target.

Background

Projectile velocity and vertical target intensity are basic parameters measured in ballistic tests during weapons equipment development and production. At present, in a shooting range test, a single canopy target is often used as a trigger device of other ballistic instruments, two canopy targets are matched with a time measuring instrument to measure the speed of a projectile, and a plurality of canopy targets are matched with a multi-path data acquisition instrument to test the shooting intensity.

The conventional awning target consists of an optical system, a photoelectric detector, a signal processing circuit and a supporting structure. The optical system, the photoelectric detector and the signal processing circuit form a photoelectric system. A typical backdrop target photovoltaic system is shown in FIG. 1. In the backdrop target, due to the action of the slit diaphragm and the optical lens, the field of view is a sector with a certain thickness, which is generally called a backdrop. The part of light energy projected to the slit by the flying projectile passing through the awning is not shielded by the awning, the photocurrent of the photoelectric conversion device changes, and the change signal passes through an amplifying and shaping circuit and then outputs a pulse signal representing that the projectile passes through the awning. And the output pulse signal and the time recorded by the timer are used for completing the measurement of the projectile velocity and the space target-hitting coordinate.

When the backdrop target is used outdoors, the sky is used as a detection background. The brightness of the sky cannot be controlled artificially, so that the use environment and the use time of the backdrop target are limited to a certain extent. When a test experiment is performed at night or indoors, an artificial light source needs to be arranged on the backdrop target to enhance background light. The technical content disclosed in chinese patent CN 1046975a can solve the problem of light source for backdrop target, but has the disadvantages of low brightness, difficult realization, and difficult accurate target distance calibration. Chinese patent CN 2760558Y discloses a "light source for a backdrop target", which provides an arc LED light source structure, and a plurality of light emitting modules are spliced into an arc to match the fan-shaped view field of the backdrop target, and the light source has the advantages of energy saving, long service life, and the like, but has the problem of complex processing and installation. Under the influence of the edge effect of the optical lens, the central illumination and the edge illumination of the field of view of the backdrop target are different, so that the detection sensitivities of different positions on the same height of the field of view of the backdrop target are different.

Disclosure of Invention

The invention aims to solve the technical problem of providing an LED artificial light source device for a backdrop target, which solves the problems of inconvenient processing, installation and adjustment and use of the artificial light source used by the traditional backdrop target and the problem that the detection sensitivity of the backdrop target at the same height is inconsistent.

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

LED artificial light source device for sky screen target, including the casing, the casing comprises the multiunit fixed plate set up even worn-out fur and multiunit LED light source unit that continues to connect in proper order in the casing, every LED light source unit all includes light source bottom plate and sets up the LED lamp array on light source bottom plate, and multiunit LED light source unit that continues to connect in proper order is on same center axis, LED light source unit sets up five groups, and two sets of LED lamp array lamp pearl density of both sides is the biggest, and inboard two sets of LED lamp array lamp pearl density is inferior, and a set of LED lamp array lamp pearl density of central authorities is minimum, and the lamp pearl figure of five LED lamp arrays is along central LED lamp array axis symmetry.

Furthermore, two ends of a lower fixing plate of the shell are respectively provided with a mounting hole.

Further, the light homogenizing plate is arranged above the plurality of groups of sequentially connected LED light source units and below the upper fixing plate.

Furthermore, the density of lamp beads of the two groups of LED lamp arrays at the two most sides is three lines; two groups of LED lamp arrays are arranged on the inner side, and the density of lamp beads is two rows; the central group of LED lamp arrays has a row of lamp bead density.

Compared with the prior art, the invention has the beneficial effects that:

the artificial light source provided by the invention enables the light emitted by the light source to be matched with the view field of the backdrop target by designing the number and the structure of the light source array, so that the problem of inconsistent detection sensitivity at the same height of the backdrop is solved, and the measurement result is more reliable; the LED light-emitting modules are arranged in a linear mode, and have the advantages of easiness in processing and convenience in assembly and adjustment; the device provided by the invention is provided with the mounting hole, can be mounted at a position corresponding to the backdrop target, and has no strict requirement on the position of the backdrop target, so that the position of the backdrop target is more flexible and the use is more convenient.

Drawings

FIG. 1 is a diagram of the components of a typical backdrop target photovoltaic system;

FIG. 2 is a schematic view of the overall structure of the present invention;

FIG. 3 is a graph showing the relative sensitivity of the awning target at the same shooting height;

FIG. 4 is a schematic diagram of a distribution quantity distribution of LEDs in accordance with one embodiment of the present invention;

FIG. 5 is a schematic diagram of a light emitting array according to one embodiment of the present invention;

FIG. 6 is a schematic view of the present invention mounted to a ceiling for use with a backdrop target;

fig. 7 is a schematic view of the invention mounted on a wall for use with a backdrop target.

In the figure, 1-shell, 2-fixed plate, 3-LED lamp array, 4-light source bottom plate, 5-light homogenizing plate and 6-mounting hole.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances.

Referring to fig. 2, the artificial LED light source device for the backdrop target comprises a housing 1, the housing 1 is composed of four fixing plates 2, a light homogenizing plate 5 and a plurality of groups of sequentially connected LED light source units are arranged in the housing 1 to form a linear light emitting array matched with a field of view of the backdrop target, each LED light source unit comprises a light source base plate 4 and LED light arrays 3 arranged on the light source base plate 4, the plurality of groups of sequentially connected LED light source units are on the same central axis, the LED light source units are provided with five groups, the density of two groups of LED light arrays 3 at the two sides is the largest, the density of two groups of LED light arrays 3 at the inner side is the second, the density of one group of LED light arrays 3 at the center is the smallest, and the number of the five groups of LED light arrays 3 is symmetrical along the central axis of.

The lower fixing plate 2 of the shell 1 is provided with a mounting hole 6 at each end. The light source device can be conveniently installed on the wall and the ceiling through the installation hole 6.

The light homogenizing plate 5 is arranged above the plurality of groups of sequentially connected LED light source units and below the upper fixing plate 2, and the light homogenizing plate 5 can enable light rays to be uniformly irradiated according to the shape of the slit on the upper fixing plate 2. Meanwhile, impurities such as dust, water vapor and the like can be prevented from entering, so that the light-emitting device is damaged.

Referring to fig. 4 and 5, in a specific embodiment, the two groups of LED lamp arrays 3 at the two extreme sides have three rows of bead densities; two groups of LED lamp arrays 3 are arranged at the inner side, and the density of lamp beads is two rows; the central group of LED lamp arrays 3 has a row of lamp bead density.

Referring to fig. 3 and 4, due to the inconsistent attenuation of light energy at various positions of the optical lens of the backdrop target, the detection sensitivity of different positions on the same height of the field of view of the backdrop target is different. The relative detection sensitivity changes basically from weak to strong to weak from left to right at the same height.

Referring to fig. 6 and 7, when the device of the present invention is used, the housing of the present invention is first fixed to the ceiling and the wall by screws through the fixing holes 6, and after the power switch is turned on, the light source is turned on, and the light emitted from the light source is emitted to the awning target through the slit of the fixing plate.

According to the invention, through the design of the quantity and the spatial distribution of the light source arrays, the illuminance emitted by the light sources is complementary with the illuminance of the backdrop target field of view, and the problem of inconsistent detection sensitivity of different positions on the same height of the backdrop target field of view can be effectively solved. Meanwhile, the plurality of linear light-emitting modules are used for forming the light source, so that the problems of processing and complex assembly and adjustment do not exist.

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

1. LED artificial light source device for backdrop target, its characterized in that: the LED lamp comprises a shell (1), wherein the shell (1) is composed of a plurality of groups of fixing plates (2), a light homogenizing plate (5) and five groups of sequentially connected LED light source units are arranged in the shell (1), each LED light source unit comprises a light source bottom plate (4) and LED lamp arrays (3) arranged on the light source bottom plate (4), the five groups of sequentially connected LED light source units are arranged on the same central axis, the density of lamp beads of two groups of LED lamp arrays (3) on the two sides is the largest, the density of lamp beads of two groups of LED lamp arrays (3) on the inner side is the second, the density of lamp beads of one group of LED lamp arrays (3) in the center is the smallest, and the number of lamp beads of the five groups of LED lamp arrays (3) is symmetrical along the central axis of;

by designing the quantity and the spatial distribution of the light source arrays, the detection sensitivities of different positions on the same height of the backdrop target field of view are consistent.

2. The LED artificial light source device for the backdrop target according to claim 1, wherein: two ends of the fixing plate (2) arranged at the lower part are respectively provided with a mounting hole (6).

3. The LED artificial light source device for the backdrop target according to claim 1 or 2, characterized in that: the light homogenizing plate (5) is arranged above the plurality of groups of sequentially connected LED light source units and below the fixing plate (2) arranged at the upper part.

4. The LED artificial light source device for the backdrop target according to claim 3, wherein: two groups of LED lamp arrays (3) at the two sides have three rows of lamp bead densities; two groups of LED lamp arrays (3) are arranged on the inner side, and the density of lamp beads is two rows; the central group of LED lamp arrays (3) has a row of lamp bead density.