KR101828821B1 - RF shielding camera with Electro Magnetic Interference fillter - Google Patents

Abstract

The present invention relates to a radio frequency (RF) shield camera having an electromagnetic interference (EMI) filter function. The objective of the present invention is to solve a noise (distortion, blurring, darkness, unsharpness, etc.) problem occurring when recording by a CCTV under a ferromagnetic exposure (test) environment including a magnetic resonance imaging (MRI) shield room by using an RF shielding fabric mesh and a shield housing structure. In addition, according to an embodiment of the present invention, an auto zoom function, an infrared imaging function, a single or a divided image control function, etc. can be selectively realized so as to improve various types of functionality and convenience in imaging, outputting, and storing, and medical stability is significantly secured by accurately identifying a state of a patient under a test as well as securing a high-quality video image.

Description

Technical Field [0001] The present invention relates to a shielding camera for an RF shielding having an EMI filter function,

The present invention relates to a problem of noise (distortion, blur, darkness, blurredness, etc.) generated in a CCTV photographing in a ferromagnetic exposure (inspection) environment including an MRI shield room by using a radio frequency (RF) By resolving the mesh, EMI (Electro Magnetic Interference) filter and RF shielding housing structure, it is possible to precisely observe or monitor the condition of the patient under examination due to the clear high image quality, The EMI filter function is improved.

In general, radiation-related work environments such as MRI shield rooms are special working environments in which access is limited due to radiation exposure of workers, and various operations in these facilities take the form of remote observation and remote operation in consideration of radiation exposure of workers.

The above-mentioned unmanned, remote operation depends mainly on visual information, and a CCTV system is generally used as a visual information source.

However, the CCD camera used in general industrial CCTV equipment is vulnerable to radiation, and when irradiated by a certain amount or more of radiation, the CCD camera becomes deteriorated and the image observation becomes impossible.

It is well known that the optical components and electronic components constituting the camera change their behavior or characteristics due to radiation damage such as ionization or lattice defects when they are exposed to radiation.

That is, the influence of the radiation-induced material changes depending on the constitution or the shape of the material, and malfunctions and defects of the camera parts become serious problems.

Passive components such as resistors and capacitors among these electronic components are resistant to radiation, and the active components such as an integrated circuit Are vulnerable to radiation.

In general, when a radiation is applied to a general lens, the color changes to a brown color. The radiation camera uses a special lens to prevent this phenomenon.

In the radiation-resistance camera using the special image sensor of the tube type, which is resistant to radiation as described above, the radiation-resistant component is mounted on the camera head and the weak radiation-sensitive component is mounted on the remote controller to minimize the influence of radiation However, the special parts are expensive and difficult to manufacture, so that it is difficult to manufacture and maintain the parts.

In addition, the method using the shielding member shields the general industrial CCD camera to improve the radiation durability, and it is advantageous in terms of user's preference and economical efficiency because it is easy to manufacture and maintain, Have.

However, the conventional radiation shielding camera uses lead as a shielding material and outputs an inverted image when viewed on a screen using only one reflector, and the thickness of shielding is increased by the shielding effect and function of the lead, And a problem that the size becomes large occurs.

That is, in the prior art, an intracardiac radiation camera using a tube-type image sensor, which is resistant to radiation as described above, or a radiation camera using a lead as a shielding body and a reflector is used.

In the case of an internal radiation camera using an image sensor of a tube-type type having a strong radiation as described above, the special parts are expensive and difficult to manufacture and difficult to manufacture and maintain. In the case of a radiation camera having one reflector mounted thereon, the shielding function of lead is not excellent, so that the thickness of the shield increases, resulting in an increase in the size of the entire camera, and an inverted image is output on the screen .

In summary, most of the cameras currently used in the MRI shield room suffer from RF noise generated by the camera during photographing, making it impossible to image an accurate image.

Further, in the past, due to the above problems, there is a problem that the state of the patient can not be observed precisely because there is no zoom function of a general image.

1. Published Patent No. 10-2015-0030816 (Published March 23, 2015)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is a technical object of the present invention to provide a method and apparatus for detecting noise (distortion, blur, darkness, blurredness, etc.) generated in a surveillance camera (CCTV) photographing in a ferromagnetic exposure By solving the problem with a fabric mesh for radio frequency (RF) shielding, an EMI (Electro Magnetic Interference) filter and an RF shielded housing structure, To monitor or monitor the patient's health, which is intended to provide a significant improvement in medical safety.

In addition, according to another embodiment of the present invention, various functions and convenience of photographing, outputting, and storing are formed so as to selectively implement the auto zoom function, the infrared photographing function, and the single or divided image control function, The object of the present invention is to provide a medical image analyzer which can ensure high quality of a video image and can accurately identify a state of a patient under examination, thereby greatly securing medical safety.

In order to achieve the above object, a shield camera of the present invention includes: a shielding housing 100 having a front assembly part 110 and a rear joining part 120 formed at both ends in a longitudinal direction of a hollow tube; A camera assy 200 housed between the inner surfaces of the shielding housing 100 to perform surveillance (observation) photographing; A fabric mesh 312 is provided to perform RF (radio frequency) shielding on the front assembly part 110 of the shielding housing, and the fabric mesh 312 is provided on the lens front side of the camera assembly 200 The lens cover assembly 300 is coupled to the front cover 320 while the front cover 320 is coupled to the front assembly 110 while being coupled thereto. The rear surface coupling part 120 of the shielding housing is RF shielded while the cable of the camera assembly and the cable 410 are electrically connected to each other while an EMI filter 420 is coupled between the electric cable and the cable 410, A cable filter assembly 400 for forming a cover 460 to remove noise generated during magnetic resonance imaging; .

The front cover 320 of the lens cover assembly 300 is formed in a ring shape so as to have openings on the surface thereof so as to correspond to the lens side of the camera assy 200 and to prevent interference during photographing, A stepped portion 324 and a groove 321 are formed on one side of the front surface of the front cover 320 so that the front surface of the front surface of the fabric 100 And is fixed by a lens cover plate 330 having a through hole 331 while accommodating the transparent window 311 and the transparent window 311, respectively.

The cable filter assembly 400 includes a filter plate 430 assembled to the rear cover 460. The filter plate 430 includes a BNC adapter 440 and a mount connector 450 And a mount connector terminal block 451 is formed on one side of the mount connector 450 so as to be connected to the EMI filter 420 coupled by the filter housing 421. The filter housing 421 is formed on one side And the EMI filter 420 is formed to be assembled to the filter plate so as not to be exposed to the outside.

Accordingly, the shielding housing 100 is configured such that a manually operated pan tilt adjustable bracket (vertically, horizontally and rightwardly and manually adjustable-lobe bolt application) is fixedly connected to a lower side by a wall bracket.

In the meantime, the present invention provides a zoom function and an image segmentation type surveillance system using a camera of a camera assy, wherein the camera is formed of any one of a general camera, a general zoom camera, and a high definition (HD) zoom camera, The camera is configured to address RF dropout, insertion loss, and grounding problems by applying RF communication and power and control line EMI filters with RF shielding and magnetic field shielding, Or a combination of these can be selected by the RS485 communication (wireless control) or the room controller (wire control), or by the zoom control, the image division, the image storage, and the infrared setting .

As described above, the present invention relates to a problem of noise (distortion, blur, darkness, blurredness, etc.) generated when capturing a surveillance camera (CCTV) in a ferromagnetic exposure (inspection) environment including an MRI shield room, And the shielding housing structure can be solved.

Meanwhile, according to another embodiment of the present invention, an auto zoom function, an infrared ray photographing function, and a single or a divided image control function can be selectively implemented to improve various functions and convenience of photographing, outputting, and storing, It is possible to secure high quality of the image and also to be able to accurately identify the state of the patient under examination, thereby greatly securing medical safety.

1 is a schematic view showing a shield camera in which an EMI filter function according to the present invention is implemented;
Fig. 2 is an enlarged view of an end surface side section of the assembled state of the present invention shown in Fig. 1,
FIGS. 3 to 4 illustrate an example of a lens cover assembly according to the present invention,
Figures 5 to 6 illustrate an example of a cable filter assembly according to the present invention,
7 is a conceptual diagram illustrating a single-type control system according to an embodiment of the present invention,
FIG. 8 is a conceptual diagram illustrating a divided control method according to another embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 to 6, the shield camera of the present invention primarily includes an RF shielding and an EMI filter, and includes a shielding housing 100, a camera assembly 200, a lens cover assembly 300, By cable filter assy (400); .

The shielding housing 100 includes a front assembly part 110 and a rear joining part 120 which are opened at both ends in the longitudinal direction of the hollow tube.

1 and 2, the shielding housing 100 includes a front assembly part 110 and a rear joining part 120, which are open at both ends in the longitudinal direction of the housing, do.

At this time, the material of the shielding housing is made of aluminum and alloyed to form a basic shielding structure if necessary.

In other words, the shielding housing is made of an aluminum extruded pipe having a circular cross-section in the drawings in the present specification as a metal of all non-magnetic materials including aluminum and stainless steel materials. At this time, it is preferable that a white powder coating is performed on the surface of the housing.

Accordingly, the shielding housing is configured such that a manually operated pan tilt adjustable bracket (applied to the upper, lower, right and left sides, and the lobe bolt) is fixedly connected to the lower side by a wall bracket.

At this time, the wall-mounted bracket may be formed as an optional embodiment as necessary, and may be formed such that a plurality of link arms divided by hinges are divided and rotated, the longitudinal distance of the multi-stage or shortened structure may be controlled like an antenna structure.

In addition, a flange may be formed at one side of the wall bracket so as to be assembled directly to the wall, and the other end of the bracket may be coupled to the bracket.

Accordingly, the pan-tilt adjustable bracket is formed so that the knob block can be manually and freely adjusted without a separate tool.

In addition, the front assembling part and the rear joining part are formed such that the front cover and the rear cover, which will be described later, are assembled correspondingly.

Meanwhile, the camera assembly 200 is accommodated between the inner surfaces of the shielding housing 100 to perform monitoring (observation) photographing.

In this case, the camera assy may be formed of any one of a general camera, a general zoom camera, and a high definition (HD) zoom camera, and the selected camera may have one single type or a plurality of division type centralized control structures Respectively.

In addition, it is preferable that the camera assy is capable of zooming, image segmentation, image storage, and infrared setting by an RS485 communication (wireless control) or a room controller (wire control).

3 to 4, the lens cover assembly 300 is formed to perform RF shielding with respect to the front assembly 110 of the shielding housing.

Specifically, the front cover 320 of the lens cover assembly 300 is formed in a ring shape so as to have an opening on a surface thereof and correspond to the lens side of the camera assembly 200, A threaded portion is formed on an outer circumferential surface of one side of the front cover 320 so as to be screwed to the front assembly portion 110 of the shielding housing 100. A step 324 and a groove 321 are formed on one side of the front cover 320, And is formed to be fixed by a lens cover plate 330 having a through hole 331 while accommodating the fabric mesh 312 and the transparent window 311, respectively.

That is, a fabric mesh 312 is disposed on the lens side of the camera assembly so as to perform basic RF shielding. The fabric mesh 312 preferably includes a transparent window 311 and a pair of shield lenses 310.

In other words, the shield lens 310 of the lens assembly 300 allows the fabric mesh 312 to be coupled to the transparent window 311, and the transparent window 311 is coupled to one side groove 321 of the front cover 320 The fabric mesh 312 is accommodated in a groove groove 324 adjacent to the groove and is tightly fixed by a lens cover plate 330 having a through hole 331. The fabric mesh 312 is mounted on one side of the front cover 320 The fastening portion 322 is formed to be coupled to the assembly portion 110 of the shielding housing.

A plurality of through holes 332 are formed in the lens cover plate 330 on the outer peripheral surface of the through hole 331. A separate bolt body 334 is inserted into the through hole 332, And is formed to correspond to the engagement groove 323 of the cover 320 and then assembled.

In this case, the through hole of the lens cover plate is for allowing the camera lens to perform photographing.

At this time, a transparent window and a fabric mesh are inserted between the front cover and the lens cover plate in close contact with each other.

That is, the fabric mesh is adhered to (adhered to) one surface of the lens cover plate at the time of the first coupling, and the mesh outer circumferential surface is formed wider than the lens cover plate, and when the outer circumferential surface is folded from the front surface to the back surface, The bolt body is inserted as if passing through from the rear, thereby completing the shielding structure.

In other words, the transparent window accommodated in the groove of the front cover is formed to have a shielding structure while maintaining the transparency by the fabric mesh and the lens cover plate formed at the rear.

At this time, the transparent window 311 is formed of uncut acrylic, and the fastening part 322 of the front cover is formed so as to be easily disassembled and coupled with the internal thread of the assembly part.

At this time, it is preferable that the fabric mesh is a polyurethane fiber as a window mesh, and the diameter of one strand of the woven fiber is 0.05 to 0.1 mu m so as to ensure transparency.

At this time, the lens cover plate 330 may be formed of aluminum, and may be formed of any one of a chromate material and an alloy thereof.

In addition, the front cover is formed so that the camera is able to take a picture without interference, and is coated with white powder on the outer circumference with respect to the aluminum material.

At this time, a rotating handle for a knurled knob is formed on one side of the outer circumference of the front cover to facilitate detaching and attachment during assembly.

5 to 6, the cable filter assembly 400 shields the rear coupling part 120 of the shielding housing while allowing the cable 410 to be connected thereto, 410 are formed on the side of the EMI filter 420 so as to be coupled to remove noise generated during magnetic resonance imaging.

At this time, the cable may be configured separately for power supply and control, or may be used singly.

The filter plate 430 is formed on the surface of the cable filter assembly 400 so that the BNC adapter 440 and the mount connector 450 are coupled to each other. An EMI filter 420 coupled by a filter housing 421 is formed to be connected to the mount connector terminal block 451 to remove noise.

In detail, the filter plate is a plate-shaped panel made of a chromate material. After the front cover 460 is coupled to a separate rear cover 460, the rear cover 460 is fastened to the coupling part 120 of the shielding housing 464: Male thread molding) is formed so as to simultaneously perform the filter structure and the shielding structure when screwed together.

That is, a plurality of coupling grooves 431 are formed on the outer circumferential side of the filter plate 430, and a fixing bolt 432 is inserted into the coupling groove. The fixing bolt has a receiving groove 461, The rear cover 460 having the opening 462 is formed.

At this time, an opening hole 463 is formed on the surface of the rear cover so that the camera and the cable are connected to each other without interference.

Thus, the rear cover is formed of aluminum and coated with white powder on its outer surface.

Accordingly, the cable 410 is connected to a power cable so that a power supply and a monitoring (observation) image (or video and audio) are output, and a coaxial cable is connected to the BNC adapter so that an external monitor can be monitored .

At this time, the BNC adapter may be used for video output or audio output at the same time.

The power cable and the BNC adapter are formed to insert a shielding material to shield the electromagnetic wave when the filter cable is coupled to the filter plate.

In addition, the filter housing is formed such that the material is formed of chromate, and the power cable divided into red and black is connected to the EMI filter while maintaining shielding.

In other words, the present invention is applicable to all high-definition (HD) / low-quality (general) CCD camera high performance RF shielding / magnetic field shielding applications, nonmagnetic materials of all materials applied (aluminum / STS) Transparent) shielded transparent window, it is formed to secure a good image and is formed to solve voltage drop, insertion loss and grounding problem by applying RF communication and power and control line EMI filter .

In addition, the shielding housing, the front cover, and the rear cover have a constant pitch assembly interval due to the screw connection between the shielding housing and the front cover, and this assembly section forms the RF shielding section.

7 to 8, a zoom function and an image segmentation system using the shield camera according to the present invention will be described as follows.

1) When a single general camera is used, it is formed to perform pure observation (observation) photographing by being housed in a shielded shielding housing without a zoom function or a divider or a communication converter setting.

2) In case of using a single type general zoom camera, the zoom function is enabled, but it is formed to perform surveillance (observing) photographing that is accommodated in a shielded shielding housing without a divider or a communication converter function,

3) High quality (HD) zoom function is possible when using a single high quality (HD) zoom camera, but it is housed in a shielded shielding housing without divider or communication converter function, And is configured to perform photographing.

4) When using a general camera with a zoom function as two split type (plural ideal type), it is possible to use (apply) both the zoom function and the divider or the communication converter, and a general zoom camera So that both the original close range adjustment, the image segmentation and the radio control are possible.

5) When using a high-definition (HD) zoom camera as a two-piece split type (multiple ideal type), a high definition (HD) zoom function and a divider or a communication converter application can both be used (HD) zoom camera is formed so that both of the original close range adjustment, the image segmentation and the wireless control are both possible.

6) At this time, the monitor is formed to be one of a stand type and a wall type.

7) The external controller is a remote controller, which is formed to be capable of an auto zoom function, an image division, an infrared ray photographing conversion, and a storage function.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

100 ... shielding housing 110 ... assembly part
120 ... coupling part 200 ... camera assy
300 ... Lens cover Assy 310 ... Shielded lens
400 ... cable filter Assy 410 ... cable
420 ... EMI filter

Claims (3)

A shielding housing (100) having a front assembly part (110) and a rear joining part (120) opened at both longitudinal ends of the hollow tube; A camera assy 200 housed between the inner surfaces of the shielding housing 100 to perform surveillance (observation) photographing; A fabric mesh 312 is provided to perform RF (radio frequency) shielding on the front assembly part 110 of the shielding housing, and the fabric mesh 312 is provided on the lens front side of the camera assembly 200 The lens cover assembly 300 is coupled to the front cover 320 while the front cover 320 is coupled to the front assembly 110 while being coupled thereto. The rear surface coupling part 120 of the shielding housing is RF shielded while the cable of the camera assembly and the cable 410 are electrically connected to each other while an EMI filter 420 is coupled between the electric cable and the cable 410, A cable filter assembly 400 for forming a cover 460 to remove noise generated during magnetic resonance imaging; Respectively,
The cable filter assembly 400 may include a filter plate 430 assembled to the rear cover 460 such that the BNC adapter 440 and the mount connector 450 are coupled to the filter plate 430 on a surface thereof. And a mount connector terminal block 451 is formed on one side of the mount connector 450 so as to be connected to the EMI filter 420 coupled by the filter housing 421. The filter housing 421 has one side And the EMI filter 420 is formed so as to surround the EMI filter 420 so that the EMI filter 420 is not exposed to the outside, and is assembled to the filter plate. The lens cover assembly according to claim 1, wherein the front cover (320) of the lens cover assembly (300) is ring-shaped and has an aperture formed on its surface to correspond to the lens side of the camera assembly (200) A threaded portion is formed on an outer circumferential surface of one side of the front cover 320 so as to be screwed to the front assembly portion 110 of the shielding housing 100. A step 324 and a groove 321 are formed on one side of the front cover 320, And is fixed by a lens cover plate (330) having a through hole (331) while accommodating the fabric mesh (312) and the transparent window (311), respectively. delete

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