High-speed moving target simulation generation device

Abstract

The invention provides a high-speed moving target simulation generation device with laser cooperating with a fast rotating mirror. The high-speed moving target simulation generation device comprises a laser, the fast rotating mirror and a projection screen. The laser is used for generating laser beams; the fast rotating mirror is used for reflecting a laser beam emitted by the laser on the projection screen to form a laser spot for representing a simulated moving target; the projection screen is used for receiving reflected light of the fast rotating mirror; the fast rotating mirror is a regular prism, so that the incident laser beam forms mirror reflection on each side surface of the regular prism; the fast rotating mirror responds to the effect of a configured power source and can rotate in the axial direction of the fast rotating mirror so that laser spots on the projection screen can move in the corresponding direction. According to the device provided by the invention, when the rapid rotating mirror rotates, the incident angle of the laser on the surface of the rotating mirror continuously changes, so that the reflected laser continuously deflects, meanwhile, laser spots on the projection screen continuously move in the same direction, and a high-speed target of which the position continuously changes can be obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of high-speed moving target observation, and in particular to a high-speed moving target simulation generation device. Background Art

[0002] The observation test of high-speed moving targets is a hot topic in the current industrial and military fields. Using photoelectric sensors to obtain images of high-speed moving targets can not only study the changes of the target itself during the movement, but also test and evaluate the performance of photoelectric sensors. Under actual conditions, the use of high-speed moving objects for testing is not only costly and has poor repeatability, but also faces problems such as limited maximum speed and uncontrollable speed. Therefore, it is urgent to find a low-cost and highly operable method for simulating and generating high-speed moving targets.

[0003] refer to Figure 1 At present, the commonly used method for simulating and generating high-speed moving targets is the light strip control method. First, place a certain length of light strip horizontally in a straight line; connect the light strip to the controller, and set the parameters through the controller so that the LED beads on the light strip light up in sequence, and each time the previous bead lights up, the previous bead goes out. When the speed of the light beads lighting up reaches a certain level, the lit beads can be regarded as high-speed moving targets, and the speed can be adjusted by the controller.

[0004] However, in the above technology, since the positions of the lamp beads on the light strip are fixed and there is a certain distance between two adjacent lamp beads, it is impossible to obtain a high-speed target with a continuously changing position;

[0005] In addition, since the refresh rate of LED light strips has an upper limit, the speed of the simulated high-speed moving target is also limited. Taking the current top-level refresh rate of LEDs at 7680Hz as an example, when the distance between the lamp beads is 5cm, the maximum movement speed that the light strip can simulate is 5cm / (1 / 7680Hz)=384m / s;

[0006] Furthermore, since the refresh rate of the LED light strip cannot be changed continuously, the movement speed of the simulated target cannot be changed continuously. When the refresh rate of the LED light strip has several gears, the corresponding movement speed of the simulated target can only achieve several fixed values. Summary of the invention

[0007] The technical problem to be solved by the present invention is how to realize a high-speed moving target simulation generation method with continuous change, continuously adjustable speed and high upper limit in a high-speed moving target observation experiment; in view of this, the present invention provides a high-speed moving target simulation generation device.

[0008] The technical solution adopted by the present invention is a high-speed moving target simulation generation device, comprising:

[0009] Laser, for generating a laser beam;

[0010] A fast rotating mirror, used for reflecting the laser beam emitted by the laser onto a projection screen to form a laser spot for representing a simulated moving target;

[0011] A projection screen, used for receiving the reflected light from the fast rotating mirror;

[0012] Wherein, the fast rotating mirror is a right prism, so that the incident laser beam forms a mirror reflection on each side of the right prism;

[0013] Furthermore, the fast-rotating mirror can rotate along its own axis in response to the action of the configured power source, so that the laser spot on the projection screen moves along the corresponding direction.

[0014] In one embodiment, the fast-rotating mirror controls the movement of a mechanical structure by a computer to adjust the rotation speed of the fast-rotating mirror.

[0015] In one embodiment, the distance between the projection screen and the fast-rotating mirror is continuously adjustable.

[0016] In one embodiment, the laser beam is a continuous laser or a pulsed laser of any wavelength.

[0017] In one embodiment, the fast-rotating mirror rotates clockwise or counterclockwise.

[0018] In one embodiment, the surface of the fast rotating mirror is coated with a reflective film.

[0019] In one embodiment, the material of the fast-rotating mirror includes: glass or metal.

[0020] In one embodiment, the fast-rotating mirror is a uniform solid, or a mirror surface is attached to the side of a regular prism base to form a regular prism structure, or a hollow regular prism structure is formed by the mirror surface.

[0021] Compared with the prior art, the present invention has at least the following advantages:

[0022] In the device provided by the present invention, when the fast rotating mirror rotates, the incident angle of the laser on the rotating mirror surface changes continuously, causing the reflected laser to deflect continuously, and at the same time, the laser spot on the projection screen also moves continuously in the same direction, so as to obtain a high-speed target with a continuously changing position. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a motion target simulation generation principle in the prior art;

[0024] Figure 2 A schematic diagram of the composition of a high-speed moving target simulation generation device according to an embodiment of the present invention;

[0025] Figure 3 2 is an exemplary diagram of light deflection motion according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose, the present invention is described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0027] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] The embodiment of the present invention is a high-speed moving target simulation generation device, such as Figure 2 As shown, including:

[0030] Laser, for generating a laser beam;

[0031] A fast rotating mirror, used for reflecting the laser beam emitted by the laser onto a projection screen to form a laser spot for representing a simulated moving target;

[0032] A projection screen, used for receiving the reflected light from the fast rotating mirror;

[0033] Wherein, the fast rotating mirror is a right prism, so that the incident laser beam forms a mirror reflection on each side of the right prism;

[0034] Furthermore, the fast-rotating mirror can rotate along its own axis in response to the action of the configured power source, so that the laser spot on the projection screen moves along the corresponding direction.

[0035] Can be combined Figure 2 It is understood that in the device provided by the embodiment of the present invention, the laser generated by the laser is reflected by the fast rotating mirror and then projected onto the projection screen to form a laser spot (simulated moving target). The fast rotating mirror has a regular prism appearance, and each side of the prism has a high reflectivity to the incident laser, so that the incident laser forms a mirror reflection on each side of the prism. The fast rotating mirror rotates axially symmetrically under the drive of the mechanical structure. The computer adjusts the rotation speed of the fast rotating mirror by controlling the movement of the mechanical structure.

[0036] Fix the laser so that the incident laser remains unchanged. When the fast mirror rotates, the incident angle of the laser on the mirror surface changes continuously, causing the reflected laser to deflect continuously, and the laser spot on the projection screen also moves continuously in the same direction. As the fast mirror continues to rotate, the incident laser will enter the next adjacent side from one side of the mirror. At this time, the laser spot will return to the extreme position in the opposite direction of the movement direction and start a new cycle of movement.

[0037] Examples of light deflection motion include Figure 3 As shown, S1 is any side of the rotating mirror, a is the incident laser, the dotted line represents the normal of the rotating mirror plane, and the rotation direction is clockwise. When the laser just enters the reflection surface, the direction of its reflected light is b1; when the rotating mirror rotates and the laser is about to leave the plane, the direction of the reflected light is b2; when the laser just enters the next reflection surface, the direction of its reflected light returns to b1. This cycle repeats.

[0038] Assuming that the distance between the rotating mirror and the projection screen is L, and the rotating mirror speed is ω, it can be obtained that when the laser is perpendicular to the projection screen, the movement speed of the laser spot is v=2Lω. Among them, ω can be adjusted by a computer, and L is continuously adjustable, so the movement speed of the simulated high-speed moving target can be continuously changed. When the rotating mirror speed reaches 50 rpm (i.e. 314 rad / s) and the distance between the rotating mirror and the projection screen is 3m, the movement speed of the laser spot can reach 1884m / s, which is much higher than the 384m / s that can be simulated by the control light strip method. When the rotating mirror speed increases and the distance between the rotating mirror and the projection screen increases, the movement speed of the laser spot can be further improved to achieve the simulation of ultra-high-speed moving targets.

[0039] In this embodiment, the laser used may be a laser of any wavelength, and in practical applications, a photoelectric sensor corresponding to the laser wavelength is used for observation.

[0040] For example, the laser used may be a continuous laser or a pulsed laser.

[0041] Specifically, the rotation direction of the fast-rotating mirror may be clockwise or counterclockwise.

[0042] It should be noted that there is no material requirement for the fast rotating mirror, it can be glass, metal, etc., as long as the side has a high reflectivity to the laser.

[0043] It can be understood that the fast-rotating mirror can be a uniform solid, or a regular prism base with a mirror surface attached to the side surface, or a hollow regular prism structure surrounded by a mirror surface.

[0044] Optionally, the side surface of the fast-rotating mirror may not be coated or may be coated with a dielectric film or a metal film with high reflectivity to the laser.

[0045] Exemplarily, the mechanical structure that drives the fast-rotating mirror to rotate may be a motor or other electric motors.

[0046] Exemplarily, the projection screen may be a planar structure such as a projection curtain or a wall that diffusely reflects laser light.

[0047] Compared with the prior art, the advantages of the embodiments of the present invention are:

[0048] 1) In the embodiment of the present invention, when the fast rotating mirror rotates, the incident angle of the laser on the rotating mirror surface changes continuously, causing the reflected laser to deflect continuously, and at the same time, the laser spot on the projection screen also moves continuously in the same direction, so that a high-speed target with a continuously changing position can be obtained;

[0049] 2) In the embodiment of the present invention, the movement speed of the laser spot can be increased by increasing the rotation speed of the rotating mirror and increasing the distance between the rotating mirror and the projection screen, and the high-speed moving target simulation can be achieved at a speed much higher than the control light strip method;

[0050] 3) In the embodiment of the present invention, the continuous change of the motion speed of the simulated target can be achieved by continuously adjusting the distance between the rotating mirror and the projection screen.

[0051] Through the description of the specific implementation methods, a deeper and more specific understanding of the technical means and effects adopted by the present invention to achieve the predetermined purpose should be obtained. However, the accompanying drawings are only for reference and illustration purposes and are not intended to limit the present invention.

Claims

1. A high-speed moving target simulation generation device, characterized in that: include: Laser, for generating a laser beam; A fast rotating mirror, used for reflecting the laser beam emitted by the laser onto a projection screen to form a laser spot for representing a simulated moving target; A projection screen, used for receiving the reflected light from the fast rotating mirror; Wherein, the fast rotating mirror is a right prism, so that the incident laser beam forms a mirror reflection on each side of the right prism; Furthermore, the fast-rotating mirror can rotate along its own axis in response to the action of the configured power source, so that the laser spot on the projection screen moves along the corresponding direction.

2. The high-speed moving target simulation generation device according to claim 1, characterized in that: The fast-rotating mirror controls the movement of the mechanical structure by a computer to adjust the rotation speed of the fast-rotating mirror.

3. The high-speed moving target simulation generation device according to claim 2, characterized in that: The distance between the projection screen and the fast-rotating mirror is continuously adjustable.

4. The high-speed moving target simulation generation device according to claim 3, characterized in that: The laser beam is a continuous laser or a pulsed laser of any wavelength.

5. The high-speed moving target simulation generation device according to claim 1, characterized in that: The fast rotating mirror rotates clockwise or counterclockwise.

6. The high-speed moving target simulation generation device according to claim 1, characterized in that: The surface of the fast rotating mirror is coated with a reflective film.

7. The high-speed moving target simulation generation device according to claim 1, characterized in that: The material of the fast rotating mirror includes: glass and metal.

8. The high-speed moving target simulation generation device according to claim 1, characterized in that: The fast-rotating mirror is a uniform entity, or a mirror surface is attached to the side of a regular prism base to form a regular prism structure, or a hollow regular prism structure is formed by the mirror surface.

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