阅读说明：本技术 一种基于同轴光路结构的视频监控精确干扰方法及系统 (Video monitoring accurate interference method and system based on coaxial light path structure ) 是由 潘卫清 戴恩文 于 2021-10-22 设计创作，主要内容包括：本发明公开了一种基于同轴光路结构的视频监控精确干扰方法及系统,本发明将摄像模块的相机拍摄目标摄像头,数据处理模块计算目标摄像头所成的像与相机的视场中心的角度偏差值,并将其转换为摄像头模块的二向色镜的旋转参数；运动控制模块根据旋转参数,控制二向色镜旋转相应的角度,二向色镜改变激光器的激光光束的出射角度,使得激光光束与相机光轴一致,从而实现激光光束精确干扰目标摄像头。(The invention discloses a video monitoring accurate interference method and a system based on a coaxial light path structure.A camera of a camera module shoots a target camera, and a data processing module calculates an angle deviation value between an image formed by the target camera and a view field center of the camera and converts the angle deviation value into a rotation parameter of a dichroic mirror of the camera module; the motion control module controls the dichroic mirror to rotate by a corresponding angle according to the rotation parameters, and the dichroic mirror changes the emitting angle of the laser beam of the laser so that the laser beam is consistent with the optical axis of the camera, and the laser beam can accurately interfere with the target camera.)

1. A video monitoring accurate interference method based on a coaxial light path structure is characterized in that: shooting a target camera by a camera of the camera module, calculating an angle deviation value between an image formed by the target camera and a view field center of the camera by the data processing module, and converting the angle deviation value into a rotation parameter of a dichroic mirror of the camera module; the motion control module controls the dichroic mirror to rotate by a corresponding angle according to the rotation parameters, and the dichroic mirror changes the emitting angle of the laser beam of the laser so that the laser beam is consistent with the optical axis of the camera, and the laser beam can accurately interfere with the target camera.

2. The accurate video monitoring interference method based on the coaxial optical path structure as claimed in claim 1, wherein: the laser is modulated before being emitted, so that laser beams emitted by the laser are modulated through light intensity, frequency and divergence angle, and the angle and the effect of interfering a target camera are improved.

3. The method for accurately interfering video monitoring based on the coaxial optical path structure according to claim 1 or 2, characterized in that: the data processing module calculates an angle deviation value between an image formed by the target camera and a view field center of the camera, and specifically comprises the following steps: the distance difference between the image formed by the target camera in the camera view field and the view field center in the horizontal direction is represented by x, and the distance difference in the vertical direction is represented by y; the angle deviation value between the image formed by the target camera and the center of the field of view of the camera is phi, arctan (y/x).

4. The system for realizing the video monitoring accurate interference method based on the coaxial light path structure according to any one of claims 1 to 3, is characterized in that: the system comprises a laser, a camera module, a data processing module and a motion control module;

the camera module comprises a camera and a dichroic mirror, the camera is used for searching and shooting a target camera, the dichroic mirror is arranged at the front part of the camera, and meanwhile, the dichroic mirror is positioned in the emission direction of the laser;

the data processing module is used for calculating an angle deviation value between an image formed by the target camera and the center of a view field of the camera and converting the angle deviation value into a rotation parameter of a dichroic mirror of the camera module;

and the motion control module controls the dichroic mirror to rotate by a corresponding angle according to the rotation parameters.

5. The system of claim 4, wherein: the laser also comprises a laser control module which modulates the light intensity, the frequency and the divergence angle of the laser.

6. The system of claim 5, wherein: the laser instrument include 2 sets, 1 set daytime uses the laser instrument, 1 set night uses the laser instrument, wherein night uses the laser instrument and uses invisible light to disturb, has fine disguise.

Technical Field

The invention relates to the technical field of laser interference, in particular to a video monitoring accurate interference method and system based on a coaxial light path structure.

Background

Along with the development of science and technology, the popularity of the camera is higher and higher in recent years, the safety and stability of the society are greatly promoted, and the camera plays an important role in protecting the property safety of people. The Chinese patent with publication number CN109521630B discloses a method and a system for imaging by using a laser interference camera lens, wherein the method mainly comprises the steps that a camera finds the direction of a target and transmits the direction to a laser turntable to aim at the interference target; a laser transmitter is started to transmit a laser beam, and laser is enabled to scan and cover a continuous area in a space high frequency mode by controlling a galvanometer of a laser, so that the laser is enabled to scan the camera in a high frequency mode, images shot by target equipment are enabled to be over-saturated continuously, and normal imaging of the camera is interfered. However, the technical scheme has some disadvantages, for example, the technical scheme is not specifically disclosed, and after the camera captures the target camera, how to accurately adjust the emission direction of the laser device is achieved, so that the effect that the laser beam accurately interferes with the target camera is achieved.

Disclosure of Invention

The invention aims to provide a method and a system for accurately interfering video monitoring based on a coaxial optical path structure. The invention not only can realize that the laser beam accurately interferes the target camera, but also has simple structure and high operation efficiency.

The technical scheme of the invention is as follows: a video monitoring accurate interference method based on a coaxial light path structure comprises the steps that a camera of a camera module shoots a target camera, a data processing module calculates an angle deviation value between an image formed by the target camera and a view field center of the camera, and the angle deviation value is converted into a rotation parameter of a dichroic mirror of the camera module; the motion control module controls the dichroic mirror to rotate by a corresponding angle according to the rotation parameters, and the dichroic mirror changes the emitting angle of the laser beam of the laser so that the laser beam is consistent with the optical axis of the camera, and the laser beam can accurately interfere with the target camera.

In the accurate video monitoring interference method based on the coaxial light path structure, the laser is modulated before being emitted, so that laser beams emitted by the laser are modulated through light intensity, frequency and divergence angle, and the angle and the effect of interfering a target camera are improved.

In the foregoing accurate interference method for video monitoring based on a coaxial optical path structure, the data processing module calculates an angle deviation value between an image formed by the target camera and a view field center of the camera, specifically: the distance difference value of an image formed by the target camera in the camera view field and the center of the view field in the horizontal direction is represented by x, and the distance difference value in the vertical direction is represented by y; the angle deviation value between the image formed by the target camera and the center of the field of view of the camera is phi, arctan (y/x).

The system for realizing the accurate video monitoring interference method based on the coaxial light path structure comprises a laser, a camera module, a data processing module and a motion control module;

the camera module comprises a camera and a dichroic mirror, the camera is used for searching and shooting a target camera, the dichroic mirror is arranged at the front part of the camera, and meanwhile, the dichroic mirror is positioned in the emitting direction of the laser;

the data processing module is used for calculating an angle deviation value between an image formed by the target camera and the center of a view field of the camera and converting the angle deviation value into a rotation parameter of a dichroic mirror of the camera module;

and the motion control module controls the dichroic mirror to rotate by a corresponding angle according to the rotation parameters.

In the system, the laser further comprises a laser control module, and the laser control module modulates the light intensity, the frequency and the divergence angle of the laser.

In the foregoing system, the laser includes 2 sets, 1 set of daytime laser and 1 set of night laser, wherein the night laser uses invisible light for interference and has good concealment.

Compared with the prior art, the camera of the camera module shoots the target camera, the data processing module calculates the angle deviation value between the image formed by the target camera and the view field center of the camera, and converts the angle deviation value into the rotation parameter of the dichroic mirror of the camera module; the motion control module controls the dichroic mirror to rotate by a corresponding angle according to the rotation parameters, and the dichroic mirror changes the emitting angle of the laser beam of the laser so that the laser beam is consistent with the optical axis of the camera, and the laser beam can accurately interfere with the target camera. Therefore, the invention has the characteristics of high interference precision and high operation efficiency, and has the characteristics of small system volume, strong concealment, high operation efficiency and good reliability based on the principle of the invention. In addition, this system has 2 sets of lasers, can use invisible light to disturb night according to switching laser under daytime and the night environment, has fine disguise.

Drawings

FIG. 1 is a schematic flow chart of a method in example 1 of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic diagram illustrating calculation of an angular deviation value between a laser module and a target camera.

Detailed Description

The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.

Example 1: a video monitoring accurate interference method based on a coaxial optical path structure is disclosed, as shown in the attached figures 1 and 2, and specifically comprises the following steps:

s101, enabling the equipment to face a target camera 5, and shooting the target camera 5 by a camera 2 of a camera module;

s102, the data processing module calculates an angle deviation value between an image formed by a target camera and a view field center 1 of the camera, and converts the angle deviation value into a rotation parameter of a dichroic mirror 4 of the camera module;

s103, the motion control module controls the dichroic mirror 4 to rotate by a corresponding angle according to the rotation parameters;

and S104, starting the laser 3 and modulating the laser, wherein the laser 3 is modulated before being emitted, so that laser beams emitted by the laser 3 are modulated by light intensity, frequency and divergence angle, and the angle and effect of interfering with a target camera are improved. Meanwhile, the dichroic mirror 4 changes the emitting angle of the laser beam of the laser 3, so that the laser beam is consistent with the optical axis of the camera, and the laser beam can accurately interfere with the target camera 5.

Specifically, as shown in fig. 3, in step S102, the data processing module calculates an angle deviation value between an image formed by the target camera and a field center of the camera, specifically: the distance difference between the image formed by the target camera in the camera view field and the view field center in the horizontal direction is represented by x, and the distance difference in the vertical direction is represented by y; the angle deviation value between the image formed by the target camera and the center of the field of view of the camera is phi, arctan (y/x). l is a distance value between the camera and the dichroic mirror, and the distance value is a certain value. The angle value of the rotation required by the dichroic mirror can be calculated according to the parameters.

The system for realizing the method comprises a laser, a camera module, a data processing module and a motion control module; the laser also comprises a laser control module which modulates the light intensity, the frequency and the divergence angle of the laser.

The camera module comprises a camera and a dichroic mirror, the camera is used for searching and shooting a target camera, the dichroic mirror is arranged at the front part of the camera, and meanwhile, the dichroic mirror is positioned in the emitting direction of the laser;

the data processing module is used for calculating an angle deviation value between an image formed by the target camera and the center of a view field of the camera and converting the angle deviation value into a rotation parameter of a dichroic mirror of the camera module;

and the motion control module controls the dichroic mirror to rotate by a corresponding angle according to the rotation parameters.

Preferably, the laser comprises 2 sets, 1 set of daytime laser and 1 set of night laser, wherein the night laser uses invisible light for interference and has good concealment.