Video security and protection monitoring equipment applied to extremely weak magnetic environment

Abstract

The utility model discloses a video security and protection monitoring device applied to an extremely weak magnetic environment. The video security and protection monitoring device is composed of an internal photosensitive unit arranged in an extremely weak magnetic environment area, a light transmission unit penetrating through an extremely weak magnetic environment shielding layer, and an external receiving and processing unit arranged on the outer side of the extremely weak magnetic environment shielding layer. The light transmission unit is connected with the internal photosensitive unit and the external receiving and processing unit; the internal photosensitive unit comprises an objective lens shell and an objective lens; the optical transmission unit is composed of a waveguide tube and an optical fiber image transmitting bundle penetrating through the waveguide tube. And the external receiving and processing unit comprises an optical image sensor, an image processing chip, a digital compression processor, a central control unit and an Ethernet interface which are arranged in the equipment shell. According to the utility model, on the premise that electromagnetic wave pollution to the extremely weak magnetic environment caused by a chip and a circuit of the video security monitoring camera is effectively avoided, video security monitoring in the extremely weak magnetic environment is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of video security monitoring equipment, in particular to a video security monitoring equipment applied in an extremely weak magnetic environment. Background Art

[0002] The extremely weak magnetic environment is an extremely weak magnetic area achieved by shielding the earth's magnetic field and other electromagnetic fields as much as possible through various means. The existing extremely weak magnetic environment is basically at the test cabin level, and the residual magnetism is 10nT. There are no electrical circuits inside, or only weak DC measurement and control circuits. After the above circuits pass through high magnetic flux pipelines, their electromagnetic impact on the test cabin is negligible. With the needs of defense, aviation, aerospace, medical and other aspects, the establishment of a unified ultra-large extremely weak magnetic environment test room (residual magnetism is 10nT~1nT level) in the future has been put on the agenda. However, there are currently no suitable products for video security monitoring equipment in the internal area of ​​such ultra-large extremely weak magnetic environment test rooms. High-definition cameras used in ordinary places cannot be used because of internal chip and circuit problems, which will cause electromagnetic pollution to the extremely weak magnetic environment. Utility Model Content

[0003] The purpose of the utility model is to provide a video security monitoring device for use in an extremely weak magnetic environment, which can realize the video security monitoring requirements inside an extremely weak magnetic environment without introducing an electromagnetic interference source. The purpose of the utility model is achieved through the following technical solutions:

[0004] A video security monitoring device used in an extremely weak magnetic environment is composed of an internal photosensitive unit arranged in an extremely weak magnetic environment area, an optical transmission unit passing through an extremely weak magnetic environment shielding layer, and an external receiving and processing unit arranged outside the extremely weak magnetic environment shielding layer; the optical transmission unit connects the internal photosensitive unit and the external receiving and processing unit; the internal photosensitive unit includes an objective lens housing and an objective lens arranged at the front end of the objective lens housing; the optical transmission unit includes a waveguide and an optical fiber image transmission bundle passing through both ends of the waveguide; the external receiving and processing unit includes an external device casing and an optical image sensor, an image processing chip, a digital compression processor, a central control unit and an Ethernet interface arranged in the device casing.

[0005] For further optimization, the external receiving and processing unit is further provided with an imaging mirror, and the imaging mirror is connected to one end of the optical fiber imaging bundle and the optical image sensor.

[0006] Furthermore, the optical fiber imaging bundle is a large-section optical fiber imaging bundle with no less than 700,000 pixels.

[0007] Furthermore, the inner diameter of the waveguide is not greater than 2.5 cm, and the length of the waveguide is not greater than 30 cm.

[0008] In one embodiment, the internal photosensitive unit includes an objective lens housing and an objective lens arranged at the front end of the objective lens housing, and the optical transmission unit is composed of a waveguide and an optical fiber image transmission bundle passing through the waveguide.

[0009] In another implementation scheme, the internal photosensitive unit includes an objective lens housing, and more than two objective lens lenses arranged at the front end of the objective lens housing; the optical transmission unit includes more than two waveguides, each waveguide having an optical fiber image transmission bundle passing through it, the front end of each optical fiber image transmission bundle being connected to an objective lens, and the rear end of each optical fiber image transmission bundle being connected to an image lens; the external receiving and processing unit is provided with the same number of image lenses as the objective lens lenses, the same number of optical image sensors and image processing chips as the image lenses, and is provided with a digital image stitching and fusion processor connected to each image processing chip and simultaneously connected to the digital compression processor and the central control unit.

[0010] The internal photosensitive unit is located in the extremely weak magnetic environment area, and is connected to the external receiving and processing unit located outside the extremely weak magnetic environment shielding layer through the optical transmission unit. Because the internal photosensitive unit and the optical transmission unit are both non-electrical (i.e., they do not generate electromagnetic waves themselves), and the optical transmission unit can avoid the influence of the electromagnetic waves outside the shielding layer on the internal extremely weak magnetic environment by passing through the waveguide when passing through the shielding layer, so it will not introduce electromagnetic wave pollution. Considering that the required resolution of the existing mainstream high-definition monitoring is at least 700,000 pixels (i.e., 720P, one pixel corresponds to one pixel in the optical fiber image transmission bundle), a large-section optical fiber image transmission bundle with more than 700,000 pixels is used to achieve video screen output with corresponding pixel-level resolution.

[0011] The advantages and beneficial effects of the utility model are:

[0012] The utility model can realize video security monitoring inside an extremely weak magnetic environment under the premise of effectively avoiding electromagnetic wave pollution of the extremely weak magnetic environment caused by the chip and circuit of the video security monitoring camera itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 This is a structural schematic diagram of Example 1;

[0015] Figure 2 This is a structural diagram of Example 2.

[0016] Reference numerals:

[0017] 1. Objective lens; 2. Objective lens housing; 3. Fiber optic image bundle; 4. Extremely weak magnetic environment shielding layer; 5. Waveguide; 6. Image sensor; 7. Image processing chip; 8. Digital compression processor; 9. Central control unit; 10. Ethernet interface; 11. Equipment housing; 12. Image lens; 13. Digital image stitching and fusion processor. DETAILED DESCRIPTION

[0018] Example 1

[0019] like Figure 1 As shown, a video security monitoring device used in an extremely weak magnetic environment is composed of an internal photosensitive unit arranged in an extremely weak magnetic environment area, an optical transmission unit passing through an extremely weak magnetic environment shielding layer 4, and an external receiving and processing unit arranged outside the extremely weak magnetic environment shielding layer 4; the optical transmission unit connects the internal photosensitive unit and the external receiving and processing unit; the internal photosensitive unit includes an objective lens housing 2 and an objective lens 1 arranged at the front end of the objective lens housing 2; the optical transmission unit includes a waveguide 5 and an optical fiber image transmission bundle 3 passing through both ends of the waveguide 5; the external receiving and processing unit includes an external device housing 11 and an image sensor 6, an image processing chip 7 (such as a Movidius chip, etc.) arranged in the device housing 11, a digital compression processor 8, a central control unit 9 and an Ethernet interface 10.

[0020] The optical fiber image transmission bundle 3 is a large cross-section optical fiber image transmission bundle with no less than 700,000 pixels. The inner diameter of the waveguide 5 is no greater than 2.5 cm, and the length of the waveguide 5 is no greater than 30 cm.

[0021] The internal photosensitive unit in this embodiment includes an objective lens housing 2 and an objective lens 1 arranged at the front end of the objective lens housing 2. The optical transmission unit is composed of a waveguide 5 and an optical fiber image transmission bundle 3 passing through the waveguide 5.

[0022] Example 2

[0023] This embodiment is an improvement on the embodiment 2. Figure 2 As shown, the internal photosensitive unit includes an objective lens housing 2 and four objective lens lenses 1 arranged at the front end of the objective lens housing 2; the optical transmission unit includes four waveguides 5, each waveguide 5 passes through an optical fiber image transmission bundle 3, the front end of each optical fiber image transmission bundle 3 is connected to an objective lens lens 1, and the rear end of each optical fiber image transmission bundle 3 is connected to an image lens 12; the external receiving and processing unit is provided with four image lenses 12, four optical image sensors 6 and four image processing chips 7, and is provided with a digital image splicing and fusion processor 13 (such as ATER AGT-D image fusion processor, etc.) connected to each image processing chip 7 and simultaneously connected to a digital compression processor 8 and a central control unit 9.

[0024] This embodiment adopts a plurality of sets of [internal photosensitive unit + light transmission unit + image lens + image sensor] equipment composition, and uses a light transmission system of multiple large-section optical fiber image transmission bundles with more than 700,000 pixels and image perception-photoelectric conversion-image processing technology to achieve high-definition video image output of up to several million pixels through intelligent edge fusion of video images.

[0025] Finally, it should be noted that the above is only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred arrangement scheme, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. A video security monitoring device used in an extremely weak magnetic environment, characterized in that: It is composed of an internal photosensitive unit arranged in an extremely weak magnetic environment area, an optical transmission unit passing through an extremely weak magnetic environment shielding layer (4), and an external receiving and processing unit arranged outside the extremely weak magnetic environment shielding layer (4); the optical transmission unit is connected to the internal photosensitive unit and the external receiving and processing unit; The internal photosensitive unit comprises an objective lens housing (2) and an objective lens (1) arranged at the front end of the objective lens housing (2); The optical transmission unit is composed of a waveguide tube (5) and an optical fiber image transmission bundle (3) passing through two ends of the waveguide tube (5); The external receiving and processing unit comprises an external device casing (11) and an image sensor (6), an image processing chip (7), a digital compression processor (8), a central control unit (9) and an Ethernet interface (10) arranged in the device casing (11).

2. The video security monitoring device for use in an extremely weak magnetic environment according to claim 1, characterized in that: The external receiving and processing unit is further provided with an image mirror (12), and the image mirror (12) is connected to one end of the optical fiber image transmission bundle (3) and the image sensor (6).

3. The video security monitoring device for use in an extremely weak magnetic environment according to claim 1, characterized in that: The optical fiber image transmission bundle (3) is a large-section optical fiber image transmission bundle with no less than 700,000 pixels.

4. The video security monitoring device for use in an extremely weak magnetic environment according to claim 1, characterized in that: The inner diameter of the waveguide tube (5) is no greater than 2.5 cm, and the length of the waveguide tube (5) is no greater than 30 cm.

5. The video security monitoring device for use in an extremely weak magnetic environment according to claim 1, characterized in that: The internal photosensitive unit comprises an objective lens housing (2) and an objective lens (1) arranged at the front end of the objective lens housing (2); the light transmission unit comprises a waveguide (5) and an optical fiber image transmission bundle (3) passing through the waveguide (5).

6. The video security monitoring device for use in an extremely weak magnetic environment according to claim 1, characterized in that: The internal photosensitive unit comprises an objective lens housing (2) and two or more objective lens elements (1) arranged at the front end of the objective lens housing (2); the optical transmission unit comprises two or more waveguides (5), each waveguide (5) having an optical fiber image transmission bundle (3) extending therethrough, the front end of each optical fiber image transmission bundle (3) being connected to an objective lens element (1), and the rear end of each optical fiber image transmission bundle (3) being connected to an image lens (12); the external receiving and processing unit is provided with the same number of image lenses (12) as the objective lens elements (1), the same number of optical image sensors (6) as the image lenses (12) and image processing chips (7), and is provided with a digital image splicing and fusion processor (13) connected to each image processing chip (7) and simultaneously connected to a digital compression processor (8) and a central control unit (9).

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