KR101470399B1 - Electromagnetic measurement system - Google Patents

Abstract

The present invention relates to an electromagnetic measuring system comprising: an electromagnetic anechoic room having an inner wall which has gone through an electromagnetic shielding and absorption treatment processes; an antenna which is installed in the electromagnetic anechoic room to receive an electromagnetic wave emitted from a test sample device located in the electromagnetic anechoic room; a signal analyzer which is installed outside of the electromagnetic anechoic room to analyze the electromagnetic wave received by the antenna, and to output an image signal includes signal analysis result information; an electromagnetic shielding box which is installed in the electromagnetic anechoic room and has an inner wall that has gone through an electromagnetic shielding and absorption treatment processes; and a beam projector which is contained in the electromagnetic shielding box, and receives the image signal outputted from the signal analyzer installed outside the electromagnetic anechoic room to be projected onto a screen installed in the electromagnetic anechoic room by light.

Description

[0001] ELECTROMAGNETIC MEASUREMENT SYSTEM [0002]

The present invention relates to an electromagnetic wave measuring system.

Measurement of the degree of influence of noise or electromagnetic waves generated in an electronic device on the human body or other electronic devices is referred to as an electromagnetic wave measurement or an electromagnetic compatibility test (EMC).

As electronic devices become more and more digital and faster, the circulating currents in the circuits of electronic devices have increased, and electronic devices have become more likely to generate more noise and electromagnetic waves.

For this reason, regulations are being tightened against electromagnetic noise or electromagnetic waves generated in electronic devices, and various electromagnetic measurement systems for measuring whether electronic devices satisfy such regulations are being proposed.

Among electromagnetic measurement systems, there is a system for measuring conducted noises (Conducted Emissions), and a system for measuring radiated emissions. Noises or electromagnetic waves generated in electronic devices can be propagated to other electronic devices through wired lines such as a power source. Measuring the noise propagated to other electronic devices through a wire connected to the electronic device is called conductive noise measurement. Alternatively, an electronic device can radiate noise or electromagnetic waves into the air according to the flow of electromagnetic energy in the circuit. The measurement of noise or electromagnetic waves radiated to the air is called a radio noise measurement.

On the other hand, the radioactive noise is received through a separate antenna for electromagnetic wave measurement and transmitted through the wire, and the magnitude of the electric signal propagated through the wire is small. It is necessary to convert the electric signal of such small size into an electric signal of a noise floor or more present in the surroundings and transmit the electric signal to the electromagnetic wave measuring signal analyzer.

In this electromagnetic wave measuring system, a sample device to be subjected to electromagnetic wave measurement is placed in an electromagnetic anechoic chamber subjected to electromagnetic wave shielding and absorption processing, and electromagnetic waves generated in the sample device are received through an antenna in the electromagnetic anechoic chamber, Analyze through an external signal analyzer (possibly a computer).

In such an electromagnetic wave measurement environment, the engineer views signal analysis result information through a signal analyzer installed in a control room outside the electromagnetic anechoic chamber, and grasps electromagnetic wave emission characteristics of the sample device.

Thereafter, the engineer goes directly to the inside of the electromagnetic wave muffler room, and performs noise reduction processing and electromagnetic wave immunity enhancement processing on the sample machine, if it is judged that the noise reduction processing for the sample device, the electromagnetic wave resistance improvement processing, The debugging process is performed.

Since the position for checking the electromagnetic wave emission characteristic of the sample device and the position for performing the debugging process for correcting the electromagnetic wave emission characteristic for the sample device are different from each other, the movement of the engineer frequently occurs, have.

Also, since the debugging process is performed after the emission characteristics of the electromagnetic wave emitted from the sample device are detected at a position away from the position where the engineer performs the debugging process, the debugging accuracy may be lowered.

In view of the foregoing, it is an object of the present invention to provide an electromagnetic wave measuring system which enables the electromagnetic wave emission characteristic of a sample device to be measured through electromagnetic wave measurement and the debugging process of the sample device based on the electromagnetic wave emission characteristic can be performed at an adjacent distance.

In order to achieve the above-mentioned object, in one aspect, the present invention provides an electromagnetic anechoic chamber having an electromagnetic wave shielding and absorption processing inner wall; An antenna installed inside the electromagnetic anechoic chamber for receiving electromagnetic waves emitted from a sample device located inside the electromagnetic anechoic chamber; A signal analyzer installed outside the electromagnetic anechoic chamber for analyzing the electromagnetic waves received by the antenna and outputting a video signal including signal analysis result information; An electromagnetic wave shielding box installed inside the electromagnetic anechoic chamber and having an inner wall shielded and absorbed by electromagnetic waves; And a beam projector housed in the electromagnetic wave shield box and configured to receive the image signal output from the signal analyzer installed outside the electromagnetic anechoic chamber and reflect the received image signal on a screen installed inside the electromagnetic anechoic chamber with light do.

The electromagnetic wave shielding box has an electromagnetic wave shielding window through which light illuminated by the beam projector is transmitted.

The electromagnetic wave measuring system may further include a video signal transmitting device for transmitting the video signal output from the signal analyzer installed outside the electromagnetic anechoic chamber to the beam projector housed in the electromagnetic wave shielding case installed inside the electromagnetic anechoic chamber .

The electromagnetic wave measurement system further includes an EMI (Electro Magnetic Interference) power filter installed inside or outside the electromagnetic wave shield box to allow power supplied from the power supply unit to be applied to the beam projector after noise is removed .

The electromagnetic wave measuring system may further include a lift device for lifting the electromagnetic wave shielding case, which is housed in the space between the upper floor and the lower floor, to the upper floor.

In another aspect, the present invention relates to an electromagnetic anechoic chamber having an inner wall subjected to electromagnetic wave shielding and absorption processing; An antenna installed inside the electromagnetic anechoic chamber for receiving electromagnetic waves emitted from a sample device located inside the electromagnetic anechoic chamber; An electromagnetic wave shielding box installed inside the electromagnetic anechoic chamber and having an inner wall shielded and absorbed by electromagnetic waves; And a beam projector accommodated in the electromagnetic wave shield box and receiving a video signal including signal analysis result information on the electromagnetic wave received by the antenna, from a signal analyzer and reflecting the light onto a screen installed inside the electromagnetic anechoic chamber And an electromagnetic wave measuring system.

As described above, according to the present invention, it is possible to provide an electromagnetic wave measuring system that allows the electromagnetic wave emission characteristic of the sample device to be detected through the electromagnetic wave measurement and the debugging process for the sample device based on the electromagnetic wave emission characteristic can be performed at an adjacent distance .

This reduces the work time for the debugging process and improves the debugging accuracy.

1 is a schematic diagram of an electromagnetic wave measuring system according to an embodiment of the present invention.
2 is a detailed diagram of an electromagnetic wave measuring system according to an embodiment of the present invention.
3 is a bottom view of an electromagnetic anechoic chamber included in an electromagnetic wave measuring system according to an embodiment of the present invention.
FIG. 4 and FIG. 5 are views illustrating an example of a lift system of an electromagnetic wave shield box included in an electromagnetic wave measuring system according to an embodiment of the present invention.
6 and 7 are views illustrating another example of a lift system of an electromagnetic wave shield box included in an electromagnetic wave measuring system according to an embodiment of the present invention.
8 is a diagram illustrating an electromagnetic wave measurement system according to another embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to denote like elements throughout the drawings, even if they are shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the components from other components, and the terms do not limit the nature, order, order, or number of the components. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; intervening "or that each component may be" connected, "" coupled, "or " connected" through other components.

1 is a schematic diagram of an electromagnetic measurement system 100 according to an embodiment of the present invention.

1, an electromagnetic wave measuring system 100 according to an exemplary embodiment of the present invention may include any electric device capable of generating electromagnetic waves, such as a mobile communication terminal, a computer, a television, a printed circuit board on which electronic components are mounted, Which is a system for measuring electromagnetic waves generated by the sample device 10,

The electromagnetic wave measuring system 100 includes an electromagnetic wave anechoic chamber 110, an antenna 120, a signal analyzer 130, an electromagnetic wave shield box 140, a beam projector 150, and the like.

The electromagnetic anechoic chamber 110 has an inner wall 111 which is subjected to electromagnetic wave shielding and absorption processing. That is, the inner wall 111 of the electromagnetic anechoic chamber 110 may be an electromagnetic wave shielding member.

The antenna 120 is installed inside the electromagnetic anechoic chamber 110 and receives electromagnetic waves radiated from the sample device 10 located inside the electromagnetic anechoic chamber 110.

The signal analyzer 130 is installed outside the electromagnetic anechoic chamber 110 and analyzes an electromagnetic wave received by the antenna 120 to output a video signal including signal analysis result information.

Meanwhile, when a signal of the electromagnetic wave received by the antenna 120 is weak, a signal amplifier (not shown) for amplifying the signal intensity and transmitting the amplified signal strength to the signal analyzer 130 is installed inside or outside the electromagnetic anechoic chamber 110 It is possible.

Meanwhile, a filter (not shown) for receiving the electromagnetic wave emitted from the sample device 10 from the electromagnetic wave measuring antenna 20, filtering the frequency component of a specific frequency band and transmitting the filtered electromagnetic wave to the signal analyzer 130 And may be further included inside or outside the electromagnetic anechoic chamber 110.

The electromagnetic wave shielding box 140 is provided inside the electromagnetic wave anechoic chamber 110 and has an inner wall 141 which is subjected to electromagnetic wave shielding and absorption processing. That is, the inner wall 141 of the electromagnetic wave shield box 140 may be an electromagnetic wave shielding member.

The beam projector 150 receives the image signal output from the signal analyzer 130 installed outside the electromagnetic anechoic chamber 110 and receives the image signal from the inside of the electromagnetic anechoic chamber 110, On the screen 160 installed in the display device.

The electromagnetic wave shield box 140 for accommodating the beam projector 150 has an electromagnetic wave shield window 142 through which light illuminated by the beam projector 150 is transmitted.

Here, the electromagnetic wave shielding window 142 may be, for example, a wire mesh window.

As described above, the signal analysis result information is confirmed using the beam projector 150, for the following reasons.

Conventionally, the engineer who performs the electromagnetic wave measurement test can view the signal analysis result information through the signal analyzer 130 installed in the control room outside the electromagnetic anechoic chamber 110 or the computer connected thereto, .

Thereafter, the engineer enters the inside of the electromagnetic wave muffler room 110 directly, and judges that the noise to the sample device 10 is a noise, that is, And performs debugging processing for reduction processing, electromagnetic wave immunity enhancement processing, and the like.

As described above, since the position for confirming the electromagnetic wave emission characteristic to the sample device 10 and the position for performing the debugging process for correcting the electromagnetic wave emission characteristic to the sample device 10 are different from each other, There is a problem that the time is prolonged.

Further, since the debugging process is performed after grasping the electromagnetic wave emission characteristic of the sample device 10 at a position away from the position where the engineer performs the debugging process, there is a problem that the debugging accuracy may be lowered.

The reason why the above-described beam projector 150 is placed inside the electromagnetic anechoic chamber 110 and accommodated in the electromagnetic wave shield box 140 provided inside the electromagnetic anechoic chamber 110 is as follows.

When the beam projector 150 is installed inside the electromagnetic anechoic chamber 110 without the electromagnetic wave shield box 140, the noise signal generated by the beam projector 150 is transmitted to the electromagnetic wave emitted from the sample device 10 Together, they are received by the antenna 120 and transmitted to the signal analyzer 130. This makes it impossible to accurately measure the electromagnetic waves emitted from the sample device 10.

Therefore, a separate electromagnetic shielding box 140 is disposed inside the electromagnetic anechoic chamber 110, and the beam projector 150 is housed in the electromagnetic shielding enclosure 140.

The electromagnetic measuring system 100 briefly described above will be described in more detail with reference to FIG.

FIG. 2 is a detailed diagram of an electromagnetic wave measuring system 100 according to an embodiment of the present invention.

2, an electromagnetic wave measuring system 100 according to an embodiment of the present invention includes a signal analyzer 130 installed outside the electromagnetic anechoic chamber 110 for receiving a video signal output from the signal analyzer 130 in an electromagnetic anechoic chamber 110 And an image signal transmission device for transmitting the image signal to the beam projector 150 housed in the installed electromagnetic wave shield box 140.

2, a video signal output to the signal analyzer 130 outside the electromagnetic anechoic chamber 110 must reach the inside of the electromagnetic wave shield box 140 installed inside the electromagnetic anechoic chamber 110 .

The image signal is transmitted from the signal analyzer 130 outside the electromagnetic anechoic chamber 110 through the interior of the electromagnetic anechoic chamber 110 to the beam projector 150 ).

The signal analyzer 130 located outside the electromagnetic anechoic chamber 110 transmits the video signal line (for example, VGA, VGA, etc.) from the inside of the electromagnetic anechoic chamber 110 to the beam projector 150 housed in the electromagnetic wave shield box 140, In the case of transmitting an image signal by connecting a cable such as an HDMI or a DVI cable, a noise signal induced in the video signal line is generated inside the electromagnetic anechoic chamber 110, and the electromagnetic wave emitted from the sample device 10, 120 and may be communicated to the signal analyzer 130. This makes it impossible to accurately measure the electromagnetic waves emitted from the sample device 10.

Therefore, the video signal transmission apparatus described above can be applied to a configuration (an apparatus for converting a video signal (electric signal) and an optical signal, an optical cable, an optical cable waveguide, or the like) that converts a video signal into an optical signal in the inside of the electromagnetic anechoic chamber 110 ).

More specifically, the video signal transmission apparatus includes a first converter 220 that receives a video signal output from the signal analyzer 130 through the video signal line 210 and converts the received video signal into an optical signal, a first converter 220 A first optical cable 230 passing through the wall surface of the electromagnetic anechoic chamber 110 for transmitting the optical signal converted from the first optical cable 230 and a first optical cable waveguide 240 for outputting an optical signal transmitted from the first optical cable 230, A second optical cable 250 that transmits the optical signal output from the first optical cable waveguide 240 and a second optical cable 250 that is installed through the wall surface of the electromagnetic wave shield box 140 and receives light transmitted from the second optical cable 250, A second optical fiber waveguide 260 for outputting a signal and a second optical cable 260 for converting the optical signal output through the third optical cable 270 into a video signal and outputting the converted video signal through a video signal line 290, And a second converter 280 for inputting the input signal All.

Using the video signal transmission apparatus as described above, it is possible to improve the accuracy of electromagnetic wave measurement as well as to enable image transmission and display of long distance and high quality without deterioration of image quality, as compared with a general video signal line.

Meanwhile, the electromagnetic wave measuring system 100 according to an embodiment of the present invention is installed in the electromagnetic wave shield box 140, so that power supplied from a power supply unit (not shown) is removed from the beam projector 150 And an electromagnetic interference (EMI) power source filter 200 for applying an electromagnetic interference (EMI) power.

3 is a bottom view of an electromagnetic anechoic chamber 110 included in the electromagnetic wave measuring system 100 according to an embodiment of the present invention.

3, an electromagnetic anechoic chamber 110 in an electromagnetic wave measuring system 100 according to an embodiment of the present invention includes an upper floor 310 and a lower floor 320 that are subjected to electromagnetic wave shielding and absorption processing, It can have a bottom structure.

 3, the upper floor 320 of the electromagnetic anechoic chamber 110 may be spaced apart from the lower floor 320 by a predetermined height, so that a predetermined amount of space between the upper floor 310 and the lower floor 320 A space can be formed.

This double bottom structure allows the electromagnetic wave to be accurately measured to the sample apparatus 10 due to external vibrations being transmitted to the inside of the electromagnetic anechoic chamber 110 and causing the sample apparatus 10 and the like to vibrate slightly It is possible to reduce the phenomenon of causing a problem to the user.

The electromagnetic wave shield box 140, the video signal transmission apparatuses 210 to 290, and the electromagnetic interference noise power filter (not shown) are installed in a space formed between the upper floor 310 and the lower floor 320, 200, and the like.

 The electromagnetic shielding box 140 among the electromagnetic shielding box 140, the video signal transmitting apparatuses 210 to 290 and the electromagnetic disturbance noise power supply filter 200 is installed in a space between the upper floor 310 and the lower floor 320 The beam projector 150 may be lifted if the image signal should be projected onto the screen 160 as light.

And further includes a lift device for lifting the electromagnetic wave shield box 140 stored in the space between the upper floor 310 and the lower floor 320 above the upper floor 310 for the lift of the electromagnetic wave shield box 140 .

A method of lifting the electromagnetic shielding box 140 is a method of lifting the electromagnetic shielding enclosure 140 in parallel with the upper floor 310 and a method of lifting the electromagnetic shielding enclosure 140 in the upper floor 310 and the inclined lift .

The lift structure for the two lift systems of the electromagnetic shielding box 140 will be described with reference to Figs. 4 to 7 below. Fig.

4 and 5 are views illustrating an example of a lift method of the electromagnetic wave shield box 140 included in the electromagnetic wave measuring system 100 according to an embodiment of the present invention.

4, an electromagnetic wave shield box 140 included in the electromagnetic wave measuring system 100 according to an embodiment of the present invention is stored in a space between an upper floor 310 and a lower floor 320 And can be lifted in parallel with the upper floor 310 when the beam projector 150 housed therein needs to be used.

4 and 5, the lift apparatus 400 lifts the electromagnetic wave shield box 140 stored in the space between the upper floor 310 and the lower floor 320 above the upper floor 310, , And is lifted in parallel with the upper floor 310.

4 and 5, the lift apparatus 400 includes a motor shaft 410, a pinion gear 420 coupled to the motor shaft 410, a teeth gear 420 coupled to the pinion gear 420, 140, and the like.

4 and 5, as the pinion gear 420 rotates according to the rotation of the motor shaft 410, and the rack gear 430 thus coupled is moved, the electromagnetic wave shield box 140 is moved in the vertical direction (Up or down).

4 and 5, the lift device 400 may operate as a configuration 410, 4230, 430 for lifting the side surface of the electromagnetic wave shield box 140, and may include an electromagnetic wave shield box 140 And the bottom surface of the base plate may be lifted.

4 and 5, when the electromagnetic wave shield box 140 is stored in a space between the upper floor 310 and the lower floor 320, the electromagnetic wave anechoic chamber 110 of the video signal transmission apparatus, An upper signal line 210 connected to the output terminal of the signal analyzer 130 located outside the first transducer 130, a first transducer 220 connected to the signal transducer 220, and a first optical cable 230 connected thereto, (Not shown).

6 and 7 are views illustrating another example of a lift method of the electromagnetic wave shield box 140 included in the electromagnetic wave measuring system 100 according to an embodiment of the present invention.

6, an electromagnetic wave shield box 140 included in the electromagnetic wave measuring system 100 according to an embodiment of the present invention is stored in a space between an upper floor 310 and a lower floor 320 It can be inclinedly lifted with the upper floor 310 when the beam projector 150 housed therein needs to be used.

6 and 7, the lift apparatus 600 lifts the electromagnetic wave shield box 140 stored in the space between the upper floor 310 and the lower floor 320 above the upper floor 310 And the upper floor 310, as shown in Fig.

6 and 7, the lift device 600 may be a motor installed at the corner of the electromagnetic wave shield box 14, and the motor shaft of the motor rotates clockwise The electromagnetic wave shield box 140 can be inclinedly lifted from the upper floor 310 by rotating the electromagnetic wave shield box 140. [ Thus, the light illuminated by the beam projector 150 housed in the electromagnetic wave shield box 140 can be displayed on the screen 160.

6 and 7, when the electromagnetic wave shield box 140 is stored in a space between the upper floor 310 and the lower floor 320, The upper floor 310 and the lower floor 320 are connected to each other except for the video signal line 210 connected to the output terminal of the signal analyzer 130, the first transducer 220 connected thereto, the first optical cable 230 connected thereto, As shown in Fig.

1, the signal analyzer 130 is installed outside the electromagnetic anechoic chamber 110, and thus, the signal analyzer 130 is provided on the outside of the electromagnetic anechoic chamber 110. Therefore, the electromagnetic wave measuring system 100 according to an embodiment of the present invention, And an image transmission device.

Hereinafter, a case in which the signal analyzer is housed in the electromagnetic wave shield box 140 installed in the electromagnetic anechoic chamber 110 will be described as another embodiment.

FIG. 8 is a diagram illustrating an electromagnetic wave measuring system 800 according to another embodiment of the present invention.

8, an electromagnetic wave measuring system 800 according to another embodiment of the present invention includes an electromagnetic anechoic chamber 810 having an inner wall 811 subjected to electromagnetic wave shielding and absorption processing, An antenna 820 installed inside the electromagnetic anechoic chamber 810 for receiving the electromagnetic wave emitted from the sample device 80 located inside the electromagnetic anechoic chamber 810 and an antenna 820 installed inside the electromagnetic anechoic chamber 810, And a signal analyzer 830 for receiving a video signal including signal analysis result information stored in the electromagnetic wave shield box 840 and receiving the electromagnetic wave received by the antenna 820 from the signal analyzer 830 And a beam projector 850 that illuminates the screen 860 installed inside the electromagnetic anechoic chamber 810 with light.

8, an electromagnetic wave shield box 840 for housing the beam projector 850 has an electromagnetic wave shield window 842 through which light illuminated by the beam projector 850 is transmitted.

8, the signal analyzer 830 is accommodated in the electromagnetic wave shield box 840 so that the image signal outputted to the signal analyzer 830 is converted into the optical signal without converting the optical signal into the optical signal, .

The electromagnetic wave measuring system 800 shown in Fig. 8 is different from the electromagnetic wave measuring system 800 shown in Figs. 1 to 7 only in that the signal analyzer 830 is housed inside the electromagnetic wave shield box 840 The electromagnetic wave measuring system 100 is different from the electromagnetic wave measuring system 100 in that the remaining components and functions are the same.

The electromagnetic measurement systems 100 and 800 described above can be used for electromagnetic wave related tests such as EMC (Electro Magnetic Compatibility) or EMI (Electro Magnetic Interference), for example.

As described above, according to the present invention, electromagnetic wave measurement systems (100, 800) for enabling the identification of the electromagnetic wave emission characteristics generated in the sample device through the electromagnetic wave measurement and the debugging process for the sample device based on the electromagnetic wave emission characteristic can be performed at the adjacent distance There is an effect to provide.

This reduces the work time for the debugging process and improves the debugging accuracy.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. , Separation, substitution, and alteration of the invention will be apparent to those skilled in the art. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims (10)

An electromagnetic anechoic chamber having an inner wall shielded and absorbed by electromagnetic waves;
An antenna installed inside the electromagnetic anechoic chamber for receiving electromagnetic waves emitted from a sample device located inside the electromagnetic anechoic chamber;
A signal analyzer installed outside the electromagnetic anechoic chamber for analyzing the electromagnetic waves received by the antenna and outputting a video signal including signal analysis result information;
An electromagnetic wave shielding box installed inside the electromagnetic anechoic chamber and having an inner wall shielded and absorbed by electromagnetic waves; And
A beam projector which is accommodated in the electromagnetic wave shield box and receives the image signal output from the signal analyzer installed outside the electromagnetic anechoic chamber and reflects the image signal on a screen installed inside the electromagnetic anechoic chamber,
. The method according to claim 1,
In the electromagnetic wave shielding box,
Wherein the electromagnetic wave shielding window through which the light projected by the beam projector is transmitted is on one side. 3. The method of claim 2,
Wherein the electromagnetic wave shielding window is a wire mesh window. The method according to claim 1,
And an image signal transmission device for transmitting the image signal output from the signal analyzer installed outside the electromagnetic anechoic chamber to the beam projector accommodated in the electromagnetic wave shielding case installed inside the electromagnetic anechoic chamber. 5. The method of claim 4,
The video signal transmission apparatus includes:
A first converter for receiving the image signal output from the signal analyzer and converting the image signal into an optical signal;
A first optical cable for transmitting the optical signal converted by the first converter;
A first optical waveguide pipe installed through the wall surface of the electromagnetic anechoic chamber for outputting an optical signal transmitted from the first optical cable;
A second optical cable for transmitting an optical signal output from the first optical waveguide waveguide;
A second optical waveguide pipe installed through the wall surface of the electromagnetic wave shield box for outputting an optical signal transmitted from the second optical cable; And
A second converter for converting the optical signal output from the second optical waveguide waveguide into a video signal and inputting the optical signal to the beam projector through a video signal line,
. The method according to claim 1,
And an electromagnetic disturbance noise power filter installed inside or outside the electromagnetic wave shield box to allow power supplied from a power supply unit to be applied to the beam projector after noise is removed. The method according to claim 1,
The electromagnetic-
Wherein the electromagnetic wave measuring system has a double bottom structure consisting of an upper floor with electromagnetic wave shielding and absorption processing and a lower floor spaced from the upper floor. 8. The method of claim 7,
Further comprising a lift device for lifting the electromagnetic shielding case, which is housed in the space between the upper floor and the lower floor, to the upper floor. 9. The method of claim 8,
The lift apparatus includes:
Wherein the electromagnetic wave shielding box lifts the electromagnetic wave shielding box in parallel or inclined with respect to the upper floor. An electromagnetic anechoic chamber having an inner wall shielded and absorbed by electromagnetic waves;
An antenna installed inside the electromagnetic anechoic chamber for receiving electromagnetic waves emitted from a sample device located inside the electromagnetic anechoic chamber;
An electromagnetic wave shielding box installed inside the electromagnetic anechoic chamber and having an inner wall shielded and absorbed by electromagnetic waves; And
And a beam projector accommodated in the electromagnetic shielding case and receiving a video signal including signal analysis result information on the electromagnetic wave received by the antenna, from a signal analyzer and reflecting the received video signal on a screen installed inside the electromagnetic anechoic chamber, Electromagnetic measurement system.

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