Multi-beam laser remote target identification and destroy system and method

Abstract

The invention discloses a multi-beam laser remote target identification and destroy system and method, and the system comprises a 1550nm polarization coherent Doppler laser radar which is used for obtaining the distance, speed, material and atmosphere parameter information of a target; the laser matrix is provided with M laser wavelength types and N lasers corresponding to each wavelength, M and N are positive integers, and each laser is independently provided with a three-dimensional aiming function; the laser matrix is used for acquiring reflectance ratios of a target material to different wavelengths; the control module is used for deploying a strike strategy of the laser array to identify and destroy a target; the system achieves the effects of high destroying efficiency, multi-target processing capability, high fault tolerance and low energy consumption.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser radar, in particular to a multi-beam laser long-range target identification and destruction system and method. BACKGROUND

[0002] At present, the identification and destruction of long-range targets mainly rely on single-beam laser systems. The system uses a single high-energy laser beam to complete target detection, tracking and destruction in turn, and relies on a mechanical steering device to adjust the direction of the beam. However, the above-mentioned existing laser identification and destruction system has the defects of poor wavelength adaptability, low destruction efficiency, weak multi-target processing capability, high system vulnerability, poor fault tolerance, high energy consumption and difficult thermal management. In terms of destruction efficiency, different materials have different absorption levels of laser, so the destruction effect of traditional single-wavelength laser weapons on different materials (such as metal, plastic and ceramic) is very different. In terms of multi-target processing capability, the single-beam system relies on mechanical steering and cannot simultaneously cope with multiple targets or high-speed moving targets. In terms of system stability, if the laser part is damaged (such as being interfered by the enemy or overheating itself), the efficiency of the entire system will be greatly reduced. In terms of energy consumption, the traditional laser weapon needs to be continuously operated at full power, resulting in high energy consumption, large cooling demand and difficulty in maintaining long-term work. SUMMARY

[0003] The purpose of the present application is to provide a multi-beam laser long-range target identification and destruction system and method, which solves the problems of focusing difficulty and low destruction efficiency of the system in long-distance target attack.

[0004] Technical solution: The multi-beam laser long-range target identification and destruction system provided by the present application comprises: a 1550nm polarized coherent Doppler laser radar for obtaining distance, speed, depolarization ratio and atmospheric parameter information of the target, the atmospheric parameters including wind speed and atmospheric turbulence intensity; a laser matrix having M kinds of laser wavelengths and N laser devices corresponding to each wavelength, wherein M and N are positive integers, and each laser device is independently configured with a three-dimensional aiming function; the laser matrix is used to obtain the reflectivity of the target material to different wavelengths; and a control module is used to deploy the attack strategy of the laser array for target identification and destruction.

[0005] Further, the target material information is obtained through target depolarization ratio and reflectivity analysis.

[0006] Further, the target identification includes target material, distance and atmospheric attenuation of each wavelength.

[0007] Furthermore, target destruction includes determining the optimal strike wavelength, number of lasers, and single beam power based on the target material, distance, and atmospheric attenuation of each wavelength. The multi-beam laser long-range target recognition and destruction method described in the present invention is implemented based on a multi-beam laser long-range target recognition and destruction system, and includes the following steps:

[0008] (1) Analyze and process the raw signals of the laser array and the 1550nm polarization coherent Doppler wind lidar;

[0009] (2) Determine the atmospheric attenuation of each wavelength, the type of target material, and the target distance;

[0010] (3) Strike strategy for deploying laser arrays.

[0011] Furthermore, in step (1), the reflectance of the target material to different wavelengths is analyzed from the signal detected by the laser array;

[0012] Furthermore, in step (1), the target depolarization ratio, distance, wind speed and atmospheric turbulence intensity information are obtained from the signal of the 1550nm polarization coherent Doppler wind laser radar.

[0013] Furthermore, in step (2), the following is specifically performed: determining the atmospheric attenuation of each wavelength based on the wind speed and atmospheric turbulence intensity detected by the 1550nm polarization coherent Doppler wind lidar; classifying the target material based on the target depolarization ratio detected by the 1550nm polarization coherent Doppler wind lidar and the reflectance ratio of the target material at different wavelengths detected by the laser array; and determining the distance of the target detected by the 1550nm polarization coherent Doppler wind lidar.

[0014] Furthermore, step (3) is specifically as follows: the optimal strike wavelength, number of lasers and single beam power are determined according to the target material, distance and atmospheric attenuation of each wavelength, and the total power of the entire system is controlled.

[0015] Compared with the existing technology, the present invention has the following significant advantages: (1) Compared with the traditional single-wavelength single-beam laser destruction system, the multi-beam laser long-range target identification and destruction system proposed in the present invention can identify the target material, specifically select the laser wavelength with a low destruction threshold of the target material, reduce the laser output power, reduce the system power consumption, and achieve long-term stable operation. (2) The laser matrix structure proposed in the present invention can still maintain effective operation even if some lasers are destroyed. (3) The multi-beam structure can effectively improve the laser's anti-blooming ability during atmospheric transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the vehicle-mounted multi-beam target recognition and destruction system of the present invention, taking a 3×6 laser matrix as an example;

[0017] Figure 2 It is the method flow of the present invention;

[0018] Figure 3 It is a schematic diagram comparing the anti-blooming capabilities of the existing high-power single-beam laser and the multi-beam laser of the present invention. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0020] An embodiment of the present invention provides a multi-beam laser long-range target identification and destruction system, characterized by comprising: a 1550nm polarization-coherent Doppler laser radar for acquiring target distance, velocity, material, and atmospheric parameter information, including wind speed and atmospheric turbulence intensity; a laser matrix comprising M laser wavelengths and N lasers corresponding to each wavelength, where M and N are positive integers, and each laser independently configured with three-dimensional aiming capabilities; the laser matrix for acquiring the reflectance of the target material at different wavelengths; and a control module for deploying the laser array's strike strategy for target identification and destruction. Material information is obtained by analyzing the target's depolarization ratio and reflectance. Target identification involves determining the optimal strike wavelength, number of lasers, and single-beam power based on target material, distance, and atmospheric attenuation at each wavelength, and controlling the total power of the entire system. A vehicle-mounted multi-beam laser long-range target identification and destruction system is used as an example. The vehicle carries a 1550nm polarization-coherent Doppler wind-measuring laser radar and a 3×6 laser matrix. Select 3 different wavelengths: λ1 = 1064nm, λ2 = 532nm, λ3 = 355nm, such as Figure 1 shown.

[0021] like Figure 2 As shown, an embodiment of the present invention further provides a multi-beam laser long-range target recognition and destruction method, which is implemented based on a multi-beam laser long-range target recognition and destruction system, and includes the following steps:

[0022] (1) The original signals of the laser array and the 1550nm polarization coherent Doppler wind lidar are analyzed and processed; the reflectance ratio of the target material to different wavelengths is analyzed from the signal detected by the laser array; the target depolarization ratio, distance, wind speed and atmospheric turbulence intensity information are obtained from the signal of the 1550nm polarization coherent Doppler wind lidar.

[0023] (2) Determine the atmospheric attenuation of each wavelength and the category of the target material; specifically, determine the atmospheric attenuation of each wavelength based on the wind speed and atmospheric turbulence intensity detected by the 1550nm polarization coherent Doppler wind lidar; classify the target material based on the target depolarization ratio detected by the 1550nm polarization coherent Doppler wind lidar and the reflectance ratio of the target material to different wavelengths detected by the laser array.

[0024] (3) Deployment of laser array strike strategy. Specifically, the optimal strike wavelength, number of lasers, and single-beam power are determined based on the target material, distance, and atmospheric attenuation of each wavelength, and the total power of the entire system is controlled.

[0025] Thermal blooming refers to the phenomenon that when laser light is transmitted in the atmosphere, part of the energy is absorbed by air molecules and aerosols, causing the local air to expand due to heat, reduce density, and change the refractive index. When there is a crosswind, the air density in the downwind area is lower and the refractive index is smaller, which will form a beam distribution that bends toward the upwind area, causing the beam to be distorted, bent, and divergent, and deteriorating the beam quality. This makes it difficult to focus the laser during long-distance transmission, such as Figure 3 (a) As shown. High-power single-beam lasers are prone to exacerbating the thermal blooming effect due to their high power density, reducing the ability to strike long-range targets. The laser matrix structure proposed in this invention first reduces the required laser power by optimizing the target striking wavelength, and then reduces the laser power density by emitting multiple beams of lasers, thereby reducing the thermal blooming effect and improving the ability to focus on long-range targets. Figure 3 (b) The present invention achieves the effects of high destruction efficiency, multi-target processing capability, high system fault tolerance and low energy consumption.

Claims

1. A multi-beam laser long-range target recognition and destruction system, characterized in that: include: The 1550nm polarization coherent Doppler lidar is used to obtain the target's distance, speed, material and atmospheric parameter information, where atmospheric parameters include wind speed and atmospheric turbulence intensity; the laser matrix has M laser wavelength types and N lasers corresponding to each wavelength, where M and N are positive integers, and each laser is independently configured with a three-dimensional aiming function; the laser matrix is ​​used to obtain the reflectance ratio of the target material to different wavelengths; the control module is used to deploy the laser array's strike strategy for target identification and destruction.

2. A multi-beam laser long-range target recognition and destruction system according to claim 1, characterized in that: Material information is obtained through target depolarization ratio and reflectance analysis.

3. A multi-beam laser long-range target recognition and destruction system according to claim 1, characterized in that: The laser array configuration determines the optimal strike wavelength, number of lasers, and single-beam power based on the target material, distance, and atmospheric attenuation of each wavelength, thereby controlling the total power of the entire system.

4. A multi-beam laser long-range target recognition and destruction system according to claim 1, characterized in that: The multi-beam structure can effectively improve the laser's anti-blooming ability during atmospheric transmission.

5. A multi-beam laser long-range target identification and destruction method, characterized in that: The implementation of a multi-beam laser long-range target recognition and destruction system includes the following steps: (1) Analyze and process the raw signals of the laser array and the 1550nm polarization coherent Doppler wind lidar; (2) Determine the atmospheric attenuation of each wavelength, the type of target material, and the target distance; (3) Strike strategy for deploying laser arrays.

6. A multi-beam laser long-range target identification and destruction method according to claim 4, characterized in that: In step (1), the reflectance of the target material at different wavelengths is analyzed by the signal detected by the laser array.

7. The multi-beam laser long-range target recognition and destruction system according to claim 4, characterized in that: In step (1), the target depolarization ratio, distance, wind speed and atmospheric turbulence intensity information are obtained from the signal of the 1550nm polarization coherent Doppler wind laser radar.

8. The multi-beam laser long-range target identification and destruction method according to claim 4, characterized in that: In step (2), the specific steps are as follows: determining the atmospheric attenuation of each wavelength based on the wind speed and atmospheric turbulence intensity detected by the 1550nm polarization coherent Doppler wind lidar; classifying the target material based on the target depolarization ratio detected by the 1550nm polarization coherent Doppler wind lidar and the reflectance ratio of the target material at different wavelengths detected by the laser array; and determining the distance of the target detected by the 1550nm polarization coherent Doppler wind lidar.

9. The multi-beam laser long-range target identification and destruction method according to claim 4, characterized in that: Step (3) is as follows: determine the optimal strike wavelength, number of lasers and single beam power based on the target material, distance and atmospheric attenuation of each wavelength, and control the total power of the entire system.

Images