CN113794843B - Video monitoring accurate interference method and system based on coaxial light path structure - Google Patents
Video monitoring accurate interference method and system based on coaxial light path structure Download PDFInfo
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- CN113794843B CN113794843B CN202111233830.5A CN202111233830A CN113794843B CN 113794843 B CN113794843 B CN 113794843B CN 202111233830 A CN202111233830 A CN 202111233830A CN 113794843 B CN113794843 B CN 113794843B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/75—Circuitry for compensating brightness variation in the scene by influencing optical camera components
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/101—Lasers provided with means to change the location from which, or the direction in which, laser radiation is emitted
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/0607—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying physical parameters other than the potential of the electrodes, e.g. by an electric or magnetic field, mechanical deformation, pressure, light, temperature
- H01S5/0608—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying physical parameters other than the potential of the electrodes, e.g. by an electric or magnetic field, mechanical deformation, pressure, light, temperature controlled by light, e.g. optical switch
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Abstract
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.
Description
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. Chinese patent publication No. CN109521630B discloses a method and system for imaging by using a laser interference camera lens, which mainly includes that a camera finds a target position and transmits the position to a laser turntable to aim at an interference target; a laser transmitter is started to transmit laser beams, 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 high frequency sweeps a camera, images shot by target equipment are enabled to be supersaturated continuously, and normal imaging of the camera is interfered. However, the technical scheme has some disadvantages, for example, it is not specifically disclosed, and how to accurately adjust the emitting direction of the laser after the target camera is captured by the camera, so as to achieve the effect that the laser beam accurately interferes with the target camera.
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 exit 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 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 angular deviation value of the image formed by the target camera from the center of the camera's field of view 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 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.
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 system, the lasers comprise 2 sets of lasers, 1 set of lasers used in the daytime and 1 set of lasers used in the night, wherein the lasers used in the night use invisible light for interference and have 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 parameters 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 according to switching over the laser under daytime and the night environment, has fine disguise night.
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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;
s104, the laser 3 is started and modulated, the laser 3 is modulated before being emitted, and laser beams emitted by the laser 3 are modulated through light intensity, frequency and divergence angles, so that the angle and the effect of interfering 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 center of a field of view 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 angular deviation value of the image formed by the target camera from the center of the camera's field of view 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. And calculating the rotation angle value required by the dichroic mirror 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 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. 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.
Claims (5)
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, thereby realizing that the laser beam accurately interferes with the target camera;
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 angular deviation of the image made by the target camera from the center of the camera's field of view is _981 = arctan (y/x).
2. The video monitoring accurate interference method based on the coaxial optical path structure according to claim 1, characterized in that: 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 system for realizing the video monitoring accurate interference method based on the coaxial light path structure as claimed in claim 1 or 2, 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.
4. The system of claim 3, wherein: the laser also comprises a laser control module which modulates the light intensity, the frequency and the divergence angle of the laser.
5. The system of claim 4, 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.
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| CN112584053A (en) * | 2021-01-18 | 2021-03-30 | 北京同方华光***科技有限公司 | Binocular vision laser emission system and method |
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| CN105989612A (en) * | 2015-02-05 | 2016-10-05 | 王瑞 | Privacy protection device for interfering in unmanned aerial vehicle (UAV) |
| CN206087337U (en) * | 2016-09-30 | 2017-04-12 | 成都紫瑞青云航空宇航技术有限公司 | Anti - unmanned aerial vehicle system of interference formula |
| CN108737013B (en) * | 2018-05-07 | 2020-11-06 | 江西理工大学 | Multifunctional interference device and method for civil multi-rotor unmanned aerial vehicle camera system |
| CN109521630B (en) * | 2018-09-26 | 2021-05-28 | 陕西集星合智防务科技有限公司 | Method and system for interfering imaging of camera lens by using laser |
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