KR200269888Y1 - Apparatus for cutting off an induced wave for image transmitting system - Google Patents

Abstract

The present invention is an induction electromagnetic wave shielding device of an image transmission system.

According to the present invention, a broadcast antenna system for transmitting a broadcast signal at a high output, an image surveillance apparatus for photographing a moving object that is disposed in close proximity to the broadcast antenna system, and photographed video signals or video data through a predetermined cable. A monitoring apparatus provided and monitored, characterized in that it is installed in a cable to remove adverse effects of induced electromagnetic waves generated on a video signal or video data by a high power broadcast signal. Here, the induced electromagnetic wave shielding device of the image transmission system preferably includes a ferrite core, a cable that is turned a predetermined number of times on one side of the ferrite core, and a connector for physical connection with a cable respectively connected to an image monitoring device or a monitoring device. .

As a result, by installing an electromagnetic wave shielding device of an image transmission system at an appropriate point of each cable, it is possible to ensure a high-quality system configuration and a reliable system operation by removing noise-free images and errors.

Description

Induction electromagnetic shielding device of image transmission system {APPARATUS FOR CUTTING OFF AN INDUCED WAVE FOR IMAGE TRANSMITTING SYSTEM}

The present invention relates to a device for inducing electromagnetic waves of an image transmission system, and more particularly, to an image transmission system for removing adverse effects of induced electromagnetic waves caused by the broadcast signal on an image signal transmitted adjacent to a high output broadcast signal. It relates to a device for inducing electromagnetic wave shield.

Although general electronic devices or communication devices only have EMI structure of a radio wave environment, when a high output antenna of a broadcasting station is in the vicinity, a video or data communication device may malfunction. This phenomenon may be caused by a radio frequency interface (RFI). It is called.

In particular, radio waves used for commercial purposes such as radio broadcasting and TV broadcasting are wirelessly transmitted at a high power of several hundred kilowatts, and receiving a broadcast signal affects a communication line because it is a communication line.

The coverage of broadcast signals received on these telecommunications lines is considered to be within the range of approximately 5 km from the transmitting antenna, according to the recommendations of the International Telecommunication Union (ITU-T).

Meanwhile, the broadcast induced voltage generated between the tip-ground and the ring-ground is converted into the voltage between the tip-rings due to the unbalance of the line and the unbalance of the terminal circuit to transmit the image. High-frequency and high-voltage currents flow through the system, causing damage and malfunctions or electrical noise in the surrounding electrical equipment.

Due to such damage, malfunction, and electrical noise, an image transmission system installed near an antenna that transmits high frequency radio waves has a problem that broadcast induction is conducted to the cable of the image transmission system, causing malfunction or failure of an image reception function.

Accordingly, the technical and problem of the present invention are to solve such a conventional problem, and an object of the present invention is to provide an image transmission system for blocking a broadcast induced voltage conducted along an image or data cable in the vicinity of a broadcast antenna using high power. It is to provide an induction electromagnetic wave shielding device.

1 is a view for explaining the induced electromagnetic shielding apparatus of the image transmission system according to the present invention.

2 is a view for explaining an electromagnetic wave shielding apparatus according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: broadcast antenna system 200: video surveillance apparatus

210: video cable 220: data cable

300: monitoring device 412: ferrite core

410: electromagnetic wave shielding device

Inductive electromagnetic wave blocking device of the image transmission system according to one feature for realizing the object of the present invention, A broadcast antenna system that receives a broadcast signal from a broadcasting station and transmits the signal at a high output; an image monitoring apparatus for photographing a moving object that is disposed in close proximity to the broadcast antenna system; and an image cable or data In the image transmission system comprising a monitoring device provided via a cable for monitoring, Ferrite cores; A cable having the same characteristics as the image cable or the data cable and turned a predetermined number of times on one side of the ferrite core; A first connector connected to one end of the cable and configured for physical connection with a cable connected to the video surveillance apparatus; And

It is connected to the other end of the cable, comprising a second connector for physical connection with the cable connected to the monitoring device, is installed on at least one or more of the video cable or the data cable, the high-output broadcast signal By this, the adverse effect of the induced electromagnetic wave generated on the video signal or the video data is eliminated.

Here, it is preferable that the induced electromagnetic wave shielding device of the image transmission system is disposed close to the image monitoring device or the monitoring device.

According to the electromagnetic wave shielding device of the image transmission system, the electromagnetic wave shielding device of the image transmission system is installed at an appropriate point of each cable to remove noiseless clean images and errors, thereby ensuring high quality system configuration and reliable system operation. Can be.

Then, embodiments will be described so that a person skilled in the art can easily implement the present invention.

1 is a view for explaining the induced electromagnetic shielding apparatus of the image transmission system according to the present invention.

As shown in FIG. 1, the apparatus for shielding induced electromagnetic waves of an image transmission system according to the present invention includes a broadcast antenna system 100, an image monitoring device 200, and a monitoring device 300. Installed between the image monitoring device 200 and the monitoring device 300 to remove the influence of the induced electromagnetic wave generated by the high-output broadcast signal to the video signal or video data.

In more detail, the broadcast antenna system 100 receives a broadcast signal from a broadcasting station and transmits the high power wirelessly. The broadcast antenna system may be an antenna system used for general commercial broadcasting or an antenna used for a mobile communication network. In this case, since the broadcast signal transmitted wirelessly is high output, broadcast induced electromagnetic waves of high frequency voltage are generated. At this time, the induced electromagnetic waves cause other electronic devices to adversely affect radio wave interference or noise.

In particular, the generated high frequency voltage can be generated from tens of volts to hundreds of volts, and varies depending on the strength of the output of the adjacent transmission station, weather conditions such as the conditions of the site and the condition and humidity of the terrain.

The image monitoring apparatus 200 photographs an image of a moving object which is disposed in close proximity to the broadcast antenna system 100 and transmits the photographed image through a predetermined cable. For example, since the broadcast antenna system may be referred to as a national backbone network, the access of animals or people is monitored to prevent the source of a problem that is a problem when operating the broadcast antenna system.

Both ends of the image cable 210 or the data cable 220 are connected to the image monitoring apparatus 200 and the monitoring apparatus 300 to transmit the captured image signal or image data to the monitoring apparatus 300.

The monitoring device 300 may receive an image signal or image data transmitted through the image cable 210 or the data cable 220, output the image signal or image data to a predetermined display screen, and record the same.

The induced electromagnetic wave shielding device 410 is installed on the video cable 210 or the data cable 220 to remove adverse effects of the broadcast induced electromagnetic waves generated by the broadcast antenna system 100 on the video signal or the video data. To ensure normal transmission.

In particular, high-frequency electromagnetic waves transmitted from commercial broadcasting transmission towers operate by capacitive coupling, mutual inductance magnetic fields or electromagnetic fields (radio waves), that is, electromagnetic waves radiated or conducted directly from external high-power radio waves. By blocking broadcast induction that causes obstacles and malfunctions, the video cable 210 or the data cable 220 is wound around the iron core structure made of ferrite, to a predetermined length, so that general inductive electromagnetic waves and especially medium bands (536-1605) I) Block electromagnetic waves.

In FIG. 1, the inductive electromagnetic wave blocking device according to the present invention is disposed close to each of the image monitoring device 200 and the monitoring device 300, but may be disposed only close to one of the device sides, and the cable may be disposed. It may be placed in the middle.

Then, the structure of the electromagnetic wave shielding device 410 is described in more detail with reference to the accompanying drawings.

2 is a view for explaining an electromagnetic wave shielding apparatus according to an embodiment of the present invention.

Referring to FIG. 2, both ends of the ferrite core 412 are fixed by winding the image cable 210 or the data cable 220 a predetermined number of times to accommodate the image cable 210 or the data cable 220. Attach the connector (BNC connector) 414 and 416 to the.

The ferrite core 412 is a magnetic flux of a metal oxide magnetic material, has a high magnetic flux, and has a high resistance value and low frequency loss, so that no eddy current is generated. do.

Thus, the present invention thus constructed satisfies the criteria for electromagnetic wave protection (EMS) based on the standards of the International Radio Interference Committee (CISPR) and the International Electrotechnical Commission (IEC).

The cable wound around the ferrite core is preferably a cable having the same value as the impedance of the video cable or data cable.

Although a rectangular ferrite core has been described as an example of the induced electromagnetic wave shielding device, adverse effects caused by broadcast induced electromagnetic waves may be eliminated even when using a ring-shaped ferrite core or a perforated cylindrical ferrite core. In particular, in the case of using a perforated cylindrical ferrite core, even if the connector 414 and 416 are not provided separately, the one side and the other end of the cylindrical ferrite core are simply connected to the instrumented cable to remove the adverse effect of the broadcast induced electromagnetic waves. You can do it.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the present invention described in the claims below. It will be appreciated.

As described above, according to the present invention, by connecting to an image or data cable at a predetermined position in a field where high-output electromagnetic waves are radiated, it is possible to block high-voltage induced electromagnetic waves that are conducted along the cable. Of course, it is possible to maintain high image quality, eliminate control errors, greatly increase the stability of the system, and to block induced electromagnetic waves from electric shock during operation.

Claims (3)

(Correction) A broadcast antenna system receiving a broadcast signal from a broadcasting station and transmitting the signal at high power, an image surveillance apparatus for photographing a moving object disposed close to and approaching the broadcast antenna system, and photographing a video signal or video data. In the image transmission system comprising a monitoring device for receiving and monitoring through a cable or data cable, Ferrite cores; A cable having the same characteristics as the image cable or the data cable and turned a predetermined number of times on one side of the ferrite core; A first connector connected to one end of the cable and configured for physical connection with a cable connected to the video surveillance apparatus; And It is connected to the other end of the cable, comprising a second connector for physical connection with the cable connected to the monitoring device, is installed on at least one or more of the video cable or the data cable, the high-output broadcast signal The induced electromagnetic wave shielding apparatus of an image transmission system, characterized by eliminating adverse effects of induced electromagnetic waves generated on the video signal or the image data. (delete) The method of claim 1, wherein the electromagnetic wave shielding device, The electromagnetic wave shielding device of an image transmission system, characterized in that disposed close to the image monitoring device or the monitoring device.