阅读说明：本技术 弹丸着靶坐标及速度测量装置 (Pellet landing coordinate and speed measuring device ) 是由 冯斌 史元元 蔡科平 辛彬 宋玉贵 褚渊博 于 2019-09-03 设计创作，主要内容包括：本发明涉及武器弹药测试领域,具体涉及一种弹丸着靶坐标及速度测量装置。该装置包括两层靶框,每层靶框上设置一个靶面,每个靶面均由两个光源组和两个接收组构成。其中：光源组包含一个大功率红外LED灯珠、一个聚光透镜和一个光阑板,光源在空间上呈正交分布。接收组包含一个由若干个接收器件构成的接收器阵列、光阑板和隔离板,光阑板位于接收器阵列的正上方,其上分布有与接收器件形状大小完全相同的接收器孔。本发明光幕构成简单、成本低、精度较高,既能实现对弹丸坐标的测量,又能实现对速度的测量。(The invention relates to the field of weapon and ammunition testing, in particular to a pellet landing coordinate and speed measuring device. The device comprises two layers of target frames, wherein a target surface is arranged on each layer of target frame, and each target surface consists of two light source groups and two receiving groups. Wherein: the light source group comprises a high-power infrared LED lamp bead, a condensing lens and a diaphragm plate, and light sources are distributed orthogonally in space. The receiving group comprises a receiver array formed by a plurality of receiving devices, a diaphragm plate and an isolation plate, wherein the diaphragm plate is positioned right above the receiver array, and receiver holes with the shape and size completely same as those of the receiving devices are distributed on the diaphragm plate. The light curtain has the advantages of simple structure, low cost and higher precision, and can realize the measurement of the coordinates of the projectile and the speed.)

1. Pellet target-hitting coordinate and speed measuring device, its characterized in that: the measuring device comprises two layers of target frames (1), each layer of target frame (1) is of a rectangular structure, each layer of target frame (1) is formed by splicing four frame bodies, the two layers of target frames (1) are connected in parallel through connecting columns, each layer of target frame (1) is provided with a target surface, and each target surface comprises two light source groups (2) and two receiving groups (3); the two light source groups (2) are arranged on the adjacent frame bodies and are in orthogonal distribution in space, and the two receiving groups (3) are arranged on the other two frame bodies; the light source group (2) comprises high-power infrared LED lamp beads (4), the high-power infrared LED lamp beads (4) are arranged in the box body, and a condensing lens (5) and a slit diaphragm plate (6) are sequentially arranged above the high-power infrared LED lamp beads (4); the receiving group (3) comprises a receiver array (7) consisting of a plurality of receiving devices, the receiver array (7) is arranged in a box body consisting of a separation plate (9), a diaphragm plate (8) is arranged right above the receiver array (7), and a receiver hole (10) which is identical to the receiving devices in shape and size is formed in the diaphragm plate (8).

2. The projectile landing coordinate and velocity measurement device of claim 1, wherein: the receiver array (7) is composed of three rows of receiving devices, and the spacing widths of the two adjacent rows of receiving devices are the same.

3. A pellet landing coordinate and velocity measurement device as claimed in claim 1 or 2, wherein: the condensing lens (5) is tightly arranged above the high-power infrared LED lamp bead (4), and the condensing lens (5) condenses the large-angle light of the high-power infrared LED lamp bead (4) into the small-angle light required again.

4. A pellet landing coordinate and velocity measurement device as claimed in claim 3, wherein: the slit length of the slit diaphragm plate (6) is the same as the light-emitting caliber of the condenser lens (5), and the slit width and the width of the receiver array (7) form a projection relation on a plane.

Technical Field

The invention relates to the field of weapon and ammunition testing, in particular to a pellet landing coordinate and speed measuring device.

Background

In the field of weapon ammunition testing, the flight speed, the spatial position, the flight attitude and the like of a high-speed projectile are important parameters needing to be measured, and particularly in the development and testing stages of high-tech weapons, the accurate acquisition of the flight parameters of the projectile is very important for completing the evaluation of a weapon ammunition system. With the rapid development of weapon ammunition, the measurement of the impact point coordinates has been developed from the initial contact measurement devices such as paper targets, net targets, wood targets, etc., to the non-contact measurement devices such as four-light-curtain sky-screen targets, six-light-curtain sky-screen targets CCD junction standing targets based on photoelectric detection technology, and acoustic targets based on acoustic sensors. Compared with contact type measuring equipment, the non-contact measuring method can effectively, accurately and real-timely acquire data, and solves the problems of time consumption, labor consumption, material consumption and low precision of the contact type measuring equipment.

Although the acoustic target can realize the measurement of the coordinates of the impact point, the positioning precision is high; the test device is greatly influenced by external environment, is only suitable for testing the supersonic speed projectile, and theoretically cannot complete the test of the low-speed projectile; if the shooting speed of the police pistol is lower than the sound speed, the sound target cannot measure the shooting speed. The CCD intersection measurement method requires that the CCD device has high-speed and high-sensitivity performance, and the high-speed and high-sensitivity CCD device is expensive, has higher cost compared with other vertical target test systems, and is difficult to form industrialization. In the prior art, a four-light-curtain array test system utilizes four photoelectric detection targets to be arranged at fixed positions and angles, and utilizes the time when the target passes through the light curtains and the position relation between the light curtains to calculate the speed and the target-hitting coordinates of the target. But when the target is obliquely incident, the error of the measurement result is large. And six curtain light curtain targets are through increasing two light curtains on four curtain light curtain targets to solve the great problem of error when oblique incidence pellet is measured. However, from the analysis of factors such as light path, structure and cost, the four-light-curtain and six-light-curtain array system has more light curtains, the adjustment between parallel light curtains is complex, and more light sources and receiving devices have high cost.

Disclosure of Invention

The invention aims to provide a projectile landing coordinate and speed measuring device to solve the problems of difficulty in light path adjustment, high cost, low precision and the like in the prior art.

The technical scheme of the invention is as follows:

the projectile landing coordinate and speed measuring device comprises two layers of target frames, each layer of target frame is of a rectangular structure and is formed by splicing four frame bodies, the two layers of target frames are connected in parallel through connecting columns, each layer of target frame is provided with a target surface, and each target surface comprises two light source groups and two receiving groups; the two light source groups are arranged on the adjacent frame bodies and are in orthogonal distribution in space, and the two receiving groups are arranged on the other two frame bodies; the light source group comprises high-power infrared LED lamp beads, the high-power infrared LED lamp beads are arranged in the box body, and a condensing lens and a slit diaphragm plate are sequentially arranged above the high-power infrared LED lamp beads; the receiving group comprises a receiver array formed by a plurality of receiving devices, the receiver array is arranged in a box body formed by an isolation plate, a diaphragm plate is arranged right above the receiver array, and a receiver hole which is identical to the receiving devices in shape and size is arranged on the diaphragm plate.

Furthermore, the receiver array is composed of three rows of receiving devices, and the spacing widths of two adjacent rows of receiving devices are the same.

Furthermore, the condensing lens is tightly arranged above the high-power infrared LED lamp bead, and the condensing lens condenses the large-angle light of the high-power infrared LED lamp bead into the small-angle light again.

Furthermore, the slit length of the slit diaphragm plate is the same as the light-emitting aperture of the condenser lens, and the slit width and the width of the receiver array form a projection relation on a plane.

Compared with the prior art, the invention has the following advantages and effects:

1. the invention needs a small number of light sources, and the light path is easy to adjust under the condition of using the lens. The whole structure has the advantages of flexible adjustment and low cost.

2. The invention adopts a receiving device array to receive the light of a light source, subdivides the light curtain by designing three rows of receiver holes on the diaphragm plate, each hole corresponds to a receiving device, the arrangement reduces the distance between the receiving devices, and the measurement precision is higher.

3. The invention is provided with two target surfaces, and calculates the flight speed according to the coordinates and time when the projectile passes through the two target surfaces, thereby effectively solving the error problem when calculating the flight speed by using the distance and time when the projectile is obliquely incident.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a photoelectric target;

FIG. 2 is a schematic diagram of a light source set structure;

FIG. 3 is a schematic diagram of a receive group architecture;

FIG. 4 is a cross-sectional view of the receiver group A-A;

FIG. 5 is a schematic diagram of shot coordinate calculation;

FIG. 6 is an auxiliary view of shot coordinate calculation;

description of reference numerals: the system comprises a target frame, a light source group, a receiving group, an infrared LED lamp bead, a condensing lens, a slit diaphragm plate, a receiver array, a diaphragm plate, a separating plate and a receiver hole, wherein the target frame is 1, the light source group is 2, the receiving group is 3, the infrared LED lamp bead is 4, the condensing lens is 5, the slit diaphragm plate is 6, the receiver array is 7, the diaphragm plate is 8, the separating plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The basic idea of the invention is to provide a photoelectric target, wherein two target surfaces are arranged on a target frame, and each target surface is provided with two light source groups and two receiving groups which are distributed orthogonally. When the projectile sequentially passes through the two target surfaces, the landing coordinates of the two projectiles are output, and the flying speed of the projectile is further obtained according to the two coordinates and the flying time. Compared with the traditional method, the method for acquiring the projectile velocity by using the coordinates and the time can effectively avoid the measurement error caused by oblique incidence of the projectile.

The projectile landing coordinate and speed measuring device shown in the figures 1-4 comprises two layers of target frames 1, wherein each layer of target frame 1 is of a rectangular structure, a target surface is arranged on each layer of target frame 1, and each target surface consists of two light source groups 2 and two receiving groups 3; wherein: the light source group 2 comprises a high-power infrared LED lamp bead 4, a condensing lens 5 and a slit diaphragm plate 6, and the light source group 2 is in orthogonal distribution in space; the receiving group 3 comprises a receiver array 7 consisting of a plurality of receiving devices, a diaphragm plate 8 and a separation plate 9, wherein the diaphragm plate 8 is positioned right above the receiver array 7, and receiver holes 10 which have the same shape and size as the receiving devices are distributed on the diaphragm plate.

According to the illustration in fig. 1, two targets of identical structure and performance are arranged on two targets 1, parallel to each other and strictly perpendicular to the trajectory; the target surface comprises two light source groups 2 and two receiving groups 3, wherein each light source group 2 comprises an infrared LED lamp bead 4, a condensing lens 5 and a slit diaphragm plate 5; each receiving group 3 comprises one receiver array 7, one diaphragm plate 8, five separating plates 9. As shown in fig. 1-2, the infrared LED lamp beads 4 are tightly fitted with the condensing lens 5, the divergence angle of the infrared LED lamp beads 4 is 120 °, and the condensing lens 5 converges the light emitted from the LED to 30 °.

According to the illustration in fig. 1-2, the length of the slit on the slit diaphragm plate 6 is the same as the light-emitting aperture of the condenser lens 3, and it also has a fixing effect on the condenser lens 5; the slit width corresponds to the longitudinal dimension of the receiver array 7 in projection on a plane, assuming a slit width d₁The longitudinal dimension of the receiver array 7 is d₂The distance from the light source to the slit is l₁And if the size of the target surface is L, the corresponding relation is as follows: d₁/d₂＝l₁/L。

As shown in fig. 2-4, the receiver array 5 is comprised of three rows of receiving devices, with adjacent rows being spaced apart from each other. The arrangement method reduces the distance between two adjacent receiving devices and improves the measurement precision.

According to fig. 3-4, the diaphragm plate 6 comprises a plurality of receiver apertures 9, the shape and size of the receiver apertures 9 being identical to those of the receiving devices, which enables efficient use of the light from the light source impinging on the receiving devices.

According to the illustration in fig. 1 and 4, the partition plate 9 has five box bodies, the upper opening of which is connected with the diaphragm plate 6 by screws; on the spacer plate 9 parallel to the bottom layer of the diaphragm plate 8, there is distributed a receiver array 7.

According to fig. 5, the method of shot coordinate calculation is as follows: taking the center of mass of the projectile as a landing coordinate of the projectile, shielding part of receiving devices in the array when the projectile passes through the light curtain, and calculating the coordinates (x, y) of the projectile according to the detected positions of the receiving devices and the position of the light source and a formula (1); from FIG. 6, X_H、Y_GAnd (3) is substituted into the formula (2) to obtain specific shot coordinates (x, y).

Wherein: A. b two points are the position of the light source, L is the size of the target surface, x₁～x₂The distance of (a) is the range of the projectile shielding the photodiode in the X-axis direction, y₁～y₂The distance of (a) is the range of the projectile that obscures the photodiode in the Y-axis direction.

Calculating the flying speed of the projectile, establishing the basis of acquiring the coordinates of the projectile, calculating according to the flying distance and time of the projectile, and assuming that the coordinates of the projectile passing through the first target surface are (x)₁,y₁) The coordinate across the second target surface is (x)₂,y₂) And the time taken for the projectile to pass through the two target surfaces is T, the flying speed can be calculated by equation (4):

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.