A small laser projection simulation system

Abstract

The utility model provides a kind of small laser projection simulation system, belong to laser guidance weapon test field.The problem of poor spot uniformity, single interaction mode, large weight, large space requirement in traditional laser projection diffuse reflection equipment is solved.It includes main control board, with multi-channel asynchronous serial communication interface;Laser, spot adjusting assembly and fast mirror assembly are communicated with main control board through the asynchronous serial communication interface respectively;Among them, laser emits light, after adjusting spot size by spot adjusting assembly, angle adjustment is carried out by fast mirror assembly again, and is projected to diffuse reflection screen.It is mainly used for testing laser guidance weapon.

Description

Technical Field

[0001] This utility model belongs to the field of laser-guided weapon testing, and in particular relates to a small laser projection simulation system. Background Technology

[0002] In the performance acceptance testing of laser seekers, it is necessary to simulate the diffuse reflection echo signal of the target laser. Traditional methods suffer from problems such as complex structure, insufficient adjustment precision, and large space requirements. Among existing technologies, the laser projection diffuse reflection method is widely used, but it suffers from problems such as insufficient spot uniformity, single interaction mode, low lightweight and integration, and large space requirements.

[0003] In summary, a small-scale laser projection simulation system is proposed. Summary of the Invention

[0004] In view of this, the present invention aims to propose a small laser projection simulation system to solve the problems of poor light spot uniformity, single interaction mode, large weight, and large space requirement in traditional laser projection diffuse reflection equipment.

[0005] To achieve the above objectives, this utility model adopts the following technical solution to provide a small laser projection simulation system, comprising: The main control board is equipped with multiple asynchronous serial communication interfaces; The laser, beam adjustment assembly, and fast-reflecting mirror assembly communicate with the main control board via the asynchronous serial communication interface. The laser emits light, which is then adjusted in size by a spot adjustment component and then angled by a fast-reflecting mirror component before being projected onto a diffuse reflection screen.

[0006] Furthermore, the light spot adjustment component includes a motor drive module, a motion control module, and a light spot adjustment module. The motion control module receives adjustment signals from the main control board and outputs them to the motor drive module to control the light spot adjustment module for light spot adjustment.

[0007] Furthermore, the fast-reflecting mirror assembly includes a fast-reflecting mirror control module and a fast-reflecting mirror. The fast-reflecting mirror control module receives signals from the main control board and controls the fast-reflecting mirror to adjust the angle of light.

[0008] Furthermore, the light spot adjustment component includes a light spot adjustment module, a motor drive module, and a motion control module. The motion control module communicates with the main control board and controls the motor drive module to adjust the light spot adjustment module.

[0009] Furthermore, the light spot adjustment module includes an attenuator mechanism, a lens linear motion mechanism, and a lens cutting-in / cut-out mechanism.

[0010] Furthermore, the fast-reflecting mirror assembly includes a fast-reflecting mirror and a fast-reflecting mirror control module. The fast-reflecting mirror control module communicates with the main control board and controls the rotation of the fast-reflecting mirror.

[0011] Furthermore, the fast-reflecting mirror and the spot adjustment module are equipped with an optical path protection cover.

[0012] Furthermore, the optical path protective cover has two windows, one for replacing the attenuator and the other for reflecting the laser.

[0013] Furthermore, the diffuse reflection screen is supported by a mesh support structure.

[0014] Furthermore, the diffuse reflection screen has a light shield on its reflective side, and the light shield is connected to the mesh support structure.

[0015] Beneficial effects: This invention uses a fast-reflection mirror closed-loop feedback and zoom lens group linkage to achieve energy uniformity, position resolution and diameter adjustment accuracy that meet the millimeter-level detection accuracy test requirements of the seeker. Attached Figure Description

[0016] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a schematic diagram of the communication connection of the small laser projection simulation system described in this utility model; Figure 2 This is a schematic diagram of the exploded view of the small laser projection simulation system described in this utility model; Figure 3 This is a front view of the small laser projection simulation system described in this utility model; Figure 4 This is a right view of the small laser projection simulation system described in this utility model; Figure 5 This is a rear view of the small laser projection simulation system described in this utility model; Figure 6 This is a perspective right view of a small laser projection simulation system described in this utility model.

[0017] In the diagram: 1. Laser; 2. Main control board; 3. Power supply module; 4. Motor drive module; 5. Motion control module; 6. Quick-reflection mirror control module; 7. Electrical control box; 8. Mesh support structure; 9. Diffuse reflection screen; 10. Light shield; 11. Optical path protection cover; 12. Quick-reflection mirror; 13. Spot adjustment module; 14. Base plate; 15. Touch screen. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present utility model can be combined with each other, and the described embodiments are only some embodiments of the present utility model, not all embodiments.

[0019] It should be noted that the descriptions of "left," "right," "left side," "right side," "upper part," "lower part," "top," and "bottom" in this utility model are defined based on the orientation or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and are not intended to indicate or imply that the described structure must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0020] In the description of this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Referring to the accompanying drawings, this embodiment provides a small laser projection simulation system, including: Main control board 2 is equipped with multiple asynchronous serial communication interfaces; Laser 1, beam adjustment assembly, and fast-reflection mirror assembly communicate with main control board 2 via the asynchronous serial communication interface, respectively. In this process, the laser 1 emits light, which is then adjusted in size by the spot adjustment component and then angled by the fast-reflecting mirror component before being projected onto the diffuse reflection screen 9.

[0022] Laser 1 is installed inside electrical control housing 7; electrical control housing 7 integrates main control board 2, power module 3, and fast reflector control module 6; diffuse reflection screen 9 is fixed to the front end of electrical control housing 7 through mesh support structure 8; light shield 10 is installed at the front end of diffuse reflection screen 9; fast reflector 12 and spot adjustment module 13 are rigidly connected through base plate 14 and precisely controlled by motor drive module 4. The optical path protection cover 11 adopts a magnetic quick-release structure, and the axes of fast reflector 12, spot adjustment module 13, and laser 1's light output port are aligned.

[0023] Laser 1 uses Nd:YAG crystal as gain medium, and together with 808nm fiber pump module and RTP electro-optic Q-switching device, it realizes pulsed laser output with wavelength of 1.064±0.005μm. The emitted pulsed laser enters the beam adjustment module 13 through the light-transmitting hole of the electrical control box 7. The center of the light-transmitting hole of the electrical control box 7 is located on the central axis of the base plate 14.

[0024] The main control board 2 has five asynchronous serial communication interfaces, one CAN bus interface, and one Ethernet interface. The main control board 2 communicates with the laser 1 through one asynchronous serial communication interface, with the motion control module 5 through another asynchronous serial communication interface, with the fast-reflecting mirror 12 control module 6 through yet another asynchronous serial communication interface, and with the touchscreen 15 through yet another asynchronous serial communication interface. The main control board 2 can also communicate with an external test computer through one asynchronous serial communication interface, one CAN bus interface, and one Ethernet interface.

[0025] The main control board 2 can receive commands from an external control computer or touch screen 15 to adjust the spot position, spot size, laser energy, laser pulse code, and laser switch. The main control board 2 controls the fast-reflecting mirror control module 6 to drive the reflector to adjust the yaw and pitch angles of the reflector. The main control board 2 can control the periodic code of the pulsed laser emitted by the laser 1, including precise frequency code, PCM code, pseudo-random code, and custom code.

[0026] In this embodiment, the light spot adjustment component includes a motor drive module 4, a motion control module 5, and a light spot adjustment module 13. The motion control module 5 receives the adjustment signal from the main control board 2 and outputs it to the motor drive module 4 to control the light spot adjustment module 13 to adjust the light spot.

[0027] In this embodiment, the fast-reflecting mirror assembly includes a fast-reflecting mirror control module 6 and a fast-reflecting mirror 12. The fast-reflecting mirror control module 6 receives signals from the main control board 2 and controls the fast-reflecting mirror 12 to adjust the light angle.

[0028] In this embodiment, the light spot adjustment component includes a light spot adjustment module 13, a motor drive module 4, and a motion control module 5. The motion control module 5 communicates with the main control board 2 and controls the motor drive module to adjust the light spot adjustment module 13.

[0029] In this embodiment, the light spot adjustment module 13 includes an attenuator mechanism, a lens linear motion mechanism, and a lens cutting-in / cut-out mechanism.

[0030] In this embodiment, the fast-reflecting mirror assembly includes a fast-reflecting mirror 12 and a fast-reflecting mirror control module 6. The fast-reflecting mirror control module 6 communicates with the main control board 2 and controls the rotation of the fast-reflecting mirror 12.

[0031] The fast-reflecting mirror 12 control module 6 can drive the fast-reflecting mirror 12 to perform horizontal and vertical deflection, thereby controlling the position of the light spot on the diffuse reflection screen 9.

[0032] In this embodiment, the fast-reflecting mirror 12 and the light spot adjustment module 13 are provided with an optical path protection cover 11.

[0033] In this embodiment, the optical path protective cover 11 has two windows, one for replacing the attenuator and the other for reflecting the laser. The windows are magnetically attached.

[0034] In this embodiment, the diffuse reflection screen 9 is supported by a mesh support structure 8.

[0035] The substrate of the diffuse reflection screen 9 is made of acrylic with a polytetrafluoroethylene (PTFE) coating. The diffuse reflection screen 9 is designed based on the optical properties and surface microstructure of its coating material, PTFE. The rough surface microstructure of the PTFE coating material causes multiple scattering of incident light, resulting in uniform diffuse reflection.

[0036] In this embodiment, a light shield 10 is provided on the reflective side of the diffuse reflection screen 9, and the light shield 10 is connected to the mesh support structure 8.

[0037] The light shield 10 is made using 3D printing technology, has a black surface, and is installed at the front end of the diffuse reflection screen 9 with screws.

[0038] The light shield 10 and the diffuse reflection screen 9 are fixed together with screws. The light shield 10 can be replaced with other sizes to meet different light shielding requirements, and the diffuse reflection screen 9 can be replaced with other sizes to meet different diffuse reflectance requirements. Working principle: The small-scale laser projection simulation system employs the diffuse reflection method. Its optical path propagation direction is as follows: starting from the emission of laser 1, the light enters the beam adjustment module 13 for size adjustment. The adjusted beam is reflected by a fast-reflecting mirror and finally projected onto the diffuse reflection screen 9. Laser 1 is a pulsed solid-state laser. The 1.06μm laser is generated by the working material Nd:YAG (neodymium-doped yttrium aluminum garnet). After absorbing pump energy, the Nd:YAG crystal is excited to an excited state and driven by a power supply to emit pump light. The pump light acts on the working material to achieve and maintain population inversion. The pump module is placed in a resonant cavity to form oscillation, thereby achieving optical amplification and outputting the laser. The laser enters the beam adjustment module 13, where a continuously adjustable beam output is achieved using a 1mm–5mm zoom lens combined with a 4X magnification cut-in / cut-out lens group, projecting the 1064nm laser onto the fast-reflecting mirror 12. The fast-reflecting mirror controller receives the working instructions and angle data from the main control board. Based on the working instructions and the angle values ​​fed back by the angle measuring sensor, it performs calculations and combines them with the corresponding control algorithm to form a control signal. After being amplified by the power amplifier module, it generates a driving voltage, which synchronously drives the reflector to perform the corresponding deflection angle, thereby changing the direction of the beam and pointing it to the designated position on the diffuse reflection screen.

[0039] The electronic control system is based on the main control board 2, which realizes remote communication and local control via the external serial interface and can switch between two modes.

[0040] After the system is powered on, power module 3 begins converting the mains power into the voltage and current required by the internal components, followed by initialization. This includes checking the status of laser 1, returning the fast reflector 12 motor to zero, setting the default parameters of the electronic control system, and displaying the power-on interface on the screen to ensure all hardware components are ready. After initialization, a self-test is initiated: the electronic control system establishes communication with the reflector control, screen, and laser to obtain self-test information. If all self-tests pass, the system enters the normal operating procedure, awaiting user input commands; if an anomaly is detected, the system enters the anomaly branch. Anomaly information is displayed on the local screen and simultaneously indicated by system indicator lights. After a successful self-test, the system enters standby mode, with the electronic control system control chip continuously monitoring the user command input interface. At this point, the user can select either local or remote mode to enter the corresponding workflow.

[0041] Upon entering remote mode, the system continuously checks for commands from the host computer. If received, the commands are parsed, and then operations such as adjusting the spot size, moving the fast-reflecting mirror, and controlling the laser are executed sequentially. Next, it checks if the data transmission time has arrived; if so, periodic data is transmitted. After completing the operation, the system continuously listens for commands from the host computer, repeating the command detection-parsing-operation-data transmission time determination process. If the user exits remote mode on the touchscreen, the system enters local mode.

[0042] After entering local mode, the system continuously monitors for touchscreen click commands. If received, the command is parsed, and then operations such as adjusting the spot size, moving the fast-reflecting mirror, and controlling the laser are performed sequentially. Finally, the touchscreen display is updated. After completing the operations, the system continuously listens for command input and repeats the above command detection-parsing-control-display update process.

[0043] The embodiments of the present invention disclosed above are merely illustrative of the present invention. The embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention.

Claims

1. A small laser projection simulation system, characterized in that, include: The main control board (2) is equipped with multiple asynchronous serial communication interfaces; The laser (1), the beam adjustment assembly, and the fast-reflecting mirror assembly communicate with the main control board (2) through the asynchronous serial communication interface, respectively. Among them, the laser (1) emits light, and after the light spot size is adjusted by the light spot adjustment component, the angle is adjusted by the fast reflection mirror component and then projected onto the diffuse reflection screen (9).

2. The small laser projection simulation system according to claim 1, characterized in that: The light spot adjustment component includes a motor drive module (4), a motion control module (5) and a light spot adjustment module (13). The motion control module (5) receives the adjustment signal from the main control board (2) and outputs it to the motor drive module (4) to control the light spot adjustment module (13) to adjust the light spot.

3. The small laser projection simulation system according to claim 2, characterized in that: The fast-reflecting mirror assembly includes a fast-reflecting mirror control module (6) and a fast-reflecting mirror (12). The fast-reflecting mirror control module (6) receives signals from the main control board (2) and controls the fast-reflecting mirror (12) to adjust the angle of light.

4. The small laser projection simulation system according to claim 3, characterized in that: The light spot adjustment component includes a light spot adjustment module (13), a motor drive module (4), and a motion control module (5). The motion control module (5) communicates with the main control board (2) and controls the motor drive module to adjust the light spot adjustment module (13).

5. A small laser projection simulation system according to claim 4, characterized in that: The light spot adjustment module (13) includes an attenuator mechanism, a lens linear motion mechanism, and a lens cutting-in / cut-out mechanism.

6. A small laser projection simulation system according to claim 4, characterized in that: The fast-reflecting mirror assembly includes a fast-reflecting mirror (12) and a fast-reflecting mirror control module (6). The fast-reflecting mirror control module (6) communicates with the main control board (2) and controls the rotation of the fast-reflecting mirror (12).

7. A small laser projection simulation system according to claim 6, characterized in that: The fast-reflecting mirror (12) and the spot adjustment module (13) are provided with an optical path protection cover (11).

8. A small laser projection simulation system according to claim 7, characterized in that: The optical path protection cover (11) has two windows, one for replacing the attenuator and the other for reflecting the laser.

9. A small laser projection simulation system according to claim 1, characterized in that: The diffuse reflection screen (9) is supported by a mesh support structure (8).

10. A small laser projection simulation system according to claim 7, characterized in that: The diffuse reflection screen (9) has a light shield (10) on its reflective side, and the light shield (10) is connected to the mesh support structure (8).

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