Multi-target laser suppression system and method based on DMD chip

Abstract

The invention discloses a multi-target laser suppression system and method based on a DMD chip, and belongs to the technical field of laser suppression. Target area information is acquired through an image acquisition system; the target identification module performs detection, identification and threat evaluation on a target, and plans suppression resources; the DMD chip dynamic regulation and control module predicts the motion state of the target information according to the target information, and generates a driving signal to control the deflection of a micro metal reflector array of the DMD chip; a light beam emitted by the laser is homogenized, then enters the DMD chip, is modulated and then is reflected to a plurality of targets at the same time, so that synchronous pressing is realized; according to the multi-target laser suppression system and method based on the DMD chip, the problems that a traditional laser suppression system is single in target hitting, slow in response and incapable of effectively coping with a multi-target cluster are solved, and the suppression efficiency, the response speed and the multi-task processing capacity of the system are remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of laser suppression technology, and in particular relates to a multi-target laser suppression system and method based on a DMD chip. Background Technology

[0002] Laser suppression systems are critical defensive systems in modern informationized battlefields, used to counter enemy optoelectronic equipment such as optical observation and infrared guidance systems. They play a vital role in ensuring the battlefield survivability and mission execution capabilities of important friendly combat platforms. In recent years, with the emergence of new threat targets characterized by clustering and high mobility, such as drone swarms, stealth fighters, and intelligent combat vehicles, the battlefield environment has become increasingly complex. This has placed unprecedentedly high demands on the multi-target synchronous processing capabilities, system response speed, and overall strike efficiency of laser suppression systems.

[0003] Currently, traditional laser suppression systems mainly follow two technical routes. The first is a single-beam direct-fire system based on a mechanical servo structure. This type of system typically uses a high-power laser as the light source and relies on a fixed optical path or a mechanical servo gimbal to adjust the projection direction of the laser beam to achieve pinpoint suppression of a single target. Although this approach has a relatively intuitive structure and high energy concentration, its inherent drawbacks, such as large mechanical inertia, slow servo response speed, and limited field of view coverage, are quite prominent, making it difficult to effectively deal with high-speed maneuvering targets and complex combat scenarios where multiple targets appear simultaneously. The second type is a scanning system based on two-dimensional laser galvanometers. This system controls the deflection angle of two reflecting mirrors to enable the laser beam to scan at high speed in a two-dimensional plane, thereby expanding the coverage area of ​​the suppression zone to a certain extent. However, this method is essentially still a time-sequential "point scanning" working mode. Its performance is limited by the rotational inertia, control accuracy and maximum scanning frequency of the galvanometer itself. It is obviously insufficient in continuous dynamic tracking and instantaneous precise strike of high-speed moving targets. At the same time, because the laser energy is dispersed to different scanning points in the time dimension, the instantaneous energy density and strike efficiency of a single target are reduced. In addition, the overall system structure is complex and the manufacturing cost is high.

[0004] In summary, existing laser suppression technologies generally suffer from drawbacks such as the inability to simultaneously and effectively suppress multiple targets, the difficulty in balancing system response speed and strike accuracy, reliance on mechanical moving parts leading to large system size and weight, and insufficient reliability and environmental adaptability. Therefore, researching and developing a laser suppression system that can achieve simultaneous multi-target suppression, rapid response, precise strike, and a compact structure has become a critical technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-target laser suppression system and method based on a DMD chip, which solves the problems of traditional laser suppression systems being unable to effectively suppress multiple targets simultaneously, having slow system response speed, complex mechanical structure, and low strike efficiency.

[0006] To achieve the above objectives, the present invention provides a multi-target laser suppression system based on a DMD chip, including an image acquisition system, a target recognition module, a display and aiming device, a DMD chip dynamic control module, a DMD chip, a laser transmission system, and a laser module; An image acquisition system is used to obtain observational information about the target to be suppressed. The target recognition module communicates with the image acquisition system to process observation information, identify at least one target, determine the attributes, location and threat level of each target, and generate comprehensive data including target location, attributes, priority and resource allocation parameters. The display and observation device displays the target image from the target recognition module in real time, and overlays target annotations and priority information so that operators can observe the target status. The DMD chip dynamic control module is connected to the target recognition module to receive comprehensive data, predict the future position of each target based on its motion state, and generate corresponding micromirror driving signals accordingly. The DMD chip has its signal input terminal connected to the DMD chip dynamic control module, and its optical surface is located in the optical path after being shaped by the homogenizing mirror group. The DMD chip is used to control the deflection state of each micromirror in its micromirror array according to the micromirror driving signal, so as to spatially modulate the incident laser beam and reflect it simultaneously in multiple target directions to achieve synchronous laser suppression of multiple targets. The laser transmission system includes a homogenizing mirror group and a microlens array arranged sequentially, with the laser module, homogenizing mirror group, microlens array, and DMD chip arranged coaxially along the laser transmission path; Laser module, used to generate the laser beam required for suppression.

[0007] Preferably, the DMD chip consists of a regularly arranged array of miniature metal mirrors, a CMOS independent driving circuit layer, a microelectromechanical support structure, and a quartz packaging window; the microelectromechanical support structure includes a torsion hinge and a support beam.

[0008] Preferably, the homogenizing mirror group is a microlens array precisely molded from glass.

[0009] Preferably, the laser module is any one of a fiber laser, a CO2 laser, or a YAG laser.

[0010] This invention also provides a multi-target laser suppression method based on a DMD chip, comprising the following steps: Step 1: Acquire target information: Obtain observation information of the target area through an image acquisition system; Step 2, Target Identification and Resource Planning: The target identification module processes the observation information, identifies at least one target, determines the attributes, location and threat level of each target, generates a resource allocation strategy and comprehensive data including target location, attributes, priority and resource allocation parameters, and sends them to the display and observation device and the DMD chip dynamic control module respectively. Step 3: Generate dynamic control signal: The dynamic control module of the DMD chip receives comprehensive data, predicts the future position of each target based on its real-time position and movement trend, and generates a drive signal to control the deflection of the micro metal mirror array of the DMD chip. Step 4, Laser Preparation: Activate the laser module to generate a laser beam, and then homogenize and shape the laser beam by passing it through a homogenizing mirror group and a microlens array. Step 5: Perform synchronous target suppression: Irradiate the shaped laser beam onto the DMD chip. The DMD chip adjusts the deflection angle of its micro metal mirror array according to the driving signal, and reflects the incident laser beam at multiple targets simultaneously, thereby achieving synchronous laser suppression of multiple targets.

[0011] Preferably, when performing target identification and resource planning, the target identification module uses a deep learning-based target identification algorithm to automatically detect and classify targets.

[0012] Preferably, in generating the dynamic control signal, a filtering algorithm and a state estimation algorithm are used to predict the target's position at the next moment.

[0013] Preferably, when generating resource allocation strategies during target identification and resource planning, the threat level, movement trend, currently available laser power, and available modulation area of ​​the DMD chip are comprehensively considered.

[0014] Therefore, the present invention employs the above-mentioned multi-target laser suppression system and method based on a DMD chip, which has the following beneficial effects: (1) By utilizing the digital and programmable spatial light modulation characteristics of the DMD chip, the deflection state of thousands of micro metal mirror arrays can be independently controlled by electrical signals. This allows the energy of a single incident laser beam to be spatially divided and independently guided, thereby generating multiple high-energy laser spots at the same time and accurately illuminating multiple targets at different directions and distances. This achieves a technological leap from "single-point strike" to "group suppression" and completely solves the core pain point of traditional systems targeting a single target. (2) The micro metal mirror array of the DMD chip has an extremely short deflection response time, which can reach the level of microseconds to sub-milliseconds. This is far superior to any servo gimbal or laser galvanometer system that relies on mechanical motion. This enables the system to track high-speed moving targets in near real time and complete the reorientation of the beam direction, which greatly improves the response speed and combat effectiveness of the entire suppression system. (3) The beam is guided entirely by electronic control of the deflection of the micro metal mirror array, eliminating all macroscopic mechanical moving parts, which greatly simplifies the system structure, makes it more compact and lighter, and significantly improves the mechanical reliability, environmental adaptability and long-term working stability of the system. (4) The laser beam is shaped by the front homogenizing mirror group to ensure that the energy distribution of the light field irradiating the DMD chip is uniform. Combined with the precise spatial modulation of the DMD, the laser energy can be efficiently and controllably distributed to multiple targets, avoiding the ineffective dissipation of energy. Under the condition of a certain total laser power, more targets can be effectively suppressed, and the energy received by each target is more uniform and controllable.

[0015] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a multi-target laser suppression system based on a DMD chip according to the present invention. Figure 2 This is a flowchart illustrating the workflow of a multi-target laser suppression method based on a DMD chip according to the present invention. Detailed Implementation

[0017] The following detailed description of embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0018] Please see Figure 1 A multi-target laser suppression system based on a DMD chip includes an image acquisition system, a target recognition module, a display and aiming device, a DMD chip dynamic control module, a DMD chip, a laser transmission system, and a laser module. An image acquisition system is used to obtain observational information about the target to be suppressed. The target recognition module communicates with the image acquisition system to process observation information, identify at least one target, determine the attributes, location and threat level of each target, and generate comprehensive data including target location, attributes, priority and resource allocation parameters. The display and observation device displays the target image from the target recognition module in real time, and overlays target annotations and priority information so that operators can observe the target status. The DMD chip dynamic control module is connected to the target recognition module to receive comprehensive data, predict the future position of each target based on its motion state, and generate corresponding micromirror driving signals accordingly. The DMD chip's signal input terminal is connected to the DMD chip dynamic control module, and its optical surface is located in the optical path after being shaped by the homogenizing mirror group. The DMD chip is used to control the deflection state of each micromirror in its micromirror array according to the micromirror driving signal, thereby spatially modulating the incident laser beam and reflecting it simultaneously in multiple target directions to achieve synchronous laser suppression of multiple targets. In addition, the DMD chip consists of a regularly arranged array of micro metal mirrors, a CMOS independent driving circuit layer, a microelectromechanical support structure, and a quartz packaging window. The microelectromechanical support structure includes a torsion hinge and a support beam. The micro metal mirrors are connected to the support beam, and the support beam is suspended on two hinge support columns by hinges, so that the micro metal mirrors can rotate around the hinge axis. The laser transmission system includes a homogenizing mirror group and a microlens array arranged sequentially. The laser module, homogenizing mirror group, microlens array, and DMD chip are arranged coaxially along the laser transmission path. Specifically, the homogenizing mirror group is a microlens array formed by precision molding of glass.

[0019] The laser module is used to generate the laser beam required for suppression; the laser module can be any one of a fiber laser, a CO2 laser, or a YAG laser.

[0020] Please see Figure 2 A multi-target laser suppression method based on a DMD chip includes the following steps: Step 1: Acquire target information: When the flying target to be suppressed enters the field of view of the image acquisition system, the image acquisition system starts real-time imaging to perform optical or infrared imaging on the target, and can simultaneously receive auxiliary data from other sensors to form raw multimodal observation information for subsequent identification and processing. Step 2, Target Recognition and Resource Planning: The image acquisition system transmits the above observation information to the target recognition module; the target recognition module performs fusion processing on the input data, and detects, identifies, and positions one or more targets in the image based on a deep learning model (the deep learning model uses an improved YOLOv5s network to extract features and regress target boxes from the input image, and achieves accurate detection of typical targets such as small high-speed UAVs, photoelectric sensor windows, and seeker reflectors through a multi-scale feature pyramid structure; during the detection phase, the model outputs the target category (such as reconnaissance UAVs, armed UAVs, rotorcraft platforms, fixed-wing platforms, photoelectric detectors, etc.), confidence score, and target bounding box position coordinates, and further combines optical flow estimation and temporal features to classify and determine the target's motion speed, trajectory trend, and stability parameters), while extracting the target's motion state and attribute features. Based on the target's threat level, movement trend, and available laser power and modulation area, the module plans the task priority and suppression resources for each target, forming comprehensive data including target location, attributes, priority, and resource allocation parameters. This data is then sent to the display and observation device and the DMD chip dynamic control module. The display and observation device displays the target image from the target recognition module in real time, overlaying target annotations and priority information so that operators can observe the target status. Step 3: Generating Dynamic Control Signals: The DMD chip's dynamic control module receives comprehensive data, predicts the future positions of each target based on their real-time positions and motion trends, and generates drive signals to control the deflection of the micro-metal mirror array of the DMD chip. During the generation of dynamic control signals, the system filters and estimates the state of the target's real-time observation data. Kalman filtering or unscented Kalman filtering is used to update the target's position, velocity, and other states. Motion prediction based on a constant velocity / constant acceleration model is used to obtain the target's position at the next moment. During prediction, noise parameters are adaptively adjusted using observation residuals to improve robustness under high-speed maneuvering and short-term obstruction conditions. Simultaneously, look-ahead compensation is performed on the prediction results based on the overall system acquisition-processing-distribution delay to ensure that the pointing angle received by the DMD micromirror array still corresponds to the target's true position. Finally, the predicted coordinates are converted into DMD partitioning or micromirror deflection commands through optical calibration, forming a dynamic control signal that can drive the micromirror array to quickly point at the target in real time. Step 4, Laser Preparation: Activate the laser module to generate a laser beam, and then homogenize and shape the laser beam by passing it through a homogenizing mirror group and a microlens array. Step 5: Perform synchronous target suppression: Irradiate the shaped laser beam onto the DMD chip. The DMD chip adjusts the deflection angle of its micro metal mirror array according to the driving signal, and reflects the incident laser beam at multiple targets simultaneously, thereby achieving synchronous laser suppression of multiple targets.

[0021] Therefore, this invention employs the aforementioned multi-target laser suppression system and method based on a DMD chip to construct an intelligent multi-target laser suppression solution. The system acquires multi-target information through front-end image perception and intelligent recognition, and after processing, converts the suppression command into parallel drive signals for the DMD chip. The DMD chip achieves spatial segmentation and precise pointing control of the single-beam incident laser energy through rapid and independent electronically controlled deflection of its massive array of micro-metal reflectors, enabling it to simultaneously split the beam and stably track and irradiate multiple moving targets. This method fundamentally breaks through the technical bottleneck of traditional single-beam or scanning laser suppression, achieving efficient, rapid, and synchronous suppression of clustered targets. The entire system has a compact structure, a sub-millisecond response speed, and high reliability, providing a new technical path for the development of next-generation optoelectronic countermeasures equipment.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A multi-target laser suppression system based on a DMD chip, characterized in that: It includes an image acquisition system, a target recognition module, a display and aiming device, a DMD chip dynamic control module, a DMD chip, a laser transmission system, and a laser module; An image acquisition system is used to obtain observational information about the target to be suppressed. The target recognition module communicates with the image acquisition system to process observation information, identify at least one target, determine the attributes, location and threat level of each target, and generate comprehensive data including target location, attributes, priority and resource allocation parameters. The display and observation device displays the target image from the target recognition module in real time, and overlays target annotations and priority information so that operators can observe the target status. The DMD chip dynamic control module is connected to the target recognition module to receive comprehensive data, predict the future position of each target based on its motion state, and generate corresponding micromirror driving signals accordingly. The DMD chip has its signal input terminal connected to the DMD chip dynamic control module, and its optical surface is located in the optical path after being shaped by the homogenizing mirror group. The DMD chip is used to control the deflection state of each micromirror in its micromirror array according to the micromirror driving signal, so as to spatially modulate the incident laser beam and reflect it simultaneously in multiple target directions to achieve synchronous laser suppression of multiple targets. The laser transmission system includes a homogenizing mirror group and a microlens array arranged sequentially, with the laser module, homogenizing mirror group, microlens array, and DMD chip arranged coaxially along the laser transmission path; Laser module, used to generate the laser beam required for suppression.

2. The multi-target laser suppression system based on a DMD chip according to claim 1, characterized in that: The DMD chip consists of a regularly arranged array of miniature metal mirrors, a CMOS independent driving circuit layer, a microelectromechanical support structure, and a quartz packaging window; the microelectromechanical support structure includes a torsion hinge and a support beam.

3. The multi-target laser suppression system based on a DMD chip according to claim 2, characterized in that: The homogenizing lens group is specifically a microlens array formed by precision molding of glass.

4. The multi-target laser suppression system based on a DMD chip according to claim 3, characterized in that: The laser module can be any one of a fiber laser, a CO2 laser, or a YAG laser.

5. A multi-target laser suppression method based on a DMD chip, employing a multi-target laser suppression system based on a DMD chip as described in any one of claims 1-4, characterized in that, Includes the following steps: Step 1: Acquire target information: Obtain observation information of the target area through an image acquisition system; Step 2, Target Identification and Resource Planning: The target identification module processes the observation information, identifies at least one target, determines the attributes, location and threat level of each target, generates a resource allocation strategy and comprehensive data including target location, attributes, priority and resource allocation parameters, and sends them to the display and observation device and the DMD chip dynamic control module respectively. Step 3: Generate dynamic control signal: The dynamic control module of the DMD chip receives comprehensive data, predicts the future position of each target based on its real-time position and movement trend, and generates a drive signal to control the deflection of the micro metal mirror array of the DMD chip. Step 4, Laser Preparation: Activate the laser module to generate a laser beam, and then homogenize and shape the laser beam by passing it through a homogenizing mirror group and a microlens array. Step 5: Perform synchronous target suppression: Irradiate the shaped laser beam onto the DMD chip. The DMD chip adjusts the deflection angle of its micro metal mirror array according to the driving signal, and reflects the incident laser beam at multiple targets simultaneously, thereby achieving synchronous laser suppression of multiple targets.

6. The multi-target laser suppression method based on a DMD chip according to claim 5, characterized in that: When performing target identification and resource planning, the target identification module uses a deep learning-based target identification algorithm to automatically detect and classify targets.

7. The multi-target laser suppression method based on a DMD chip according to claim 6, characterized in that: In generating dynamic control signals, filtering and state estimation algorithms are used to predict the target's position at the next moment.

8. The multi-target laser suppression method based on a DMD chip according to claim 7, characterized in that: In target identification and resource planning, when generating resource allocation strategies, the threat level of the target, its movement trend, the currently available laser power, and the available modulation area of ​​the DMD chip are comprehensively considered.

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