KR101769238B1 - Method and Apparatus for Evaluating EMC in Special Power Distribution Zone on Ship - Google Patents
Method and Apparatus for Evaluating EMC in Special Power Distribution Zone on Ship Download PDFInfo
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- KR101769238B1 KR101769238B1 KR1020160020511A KR20160020511A KR101769238B1 KR 101769238 B1 KR101769238 B1 KR 101769238B1 KR 1020160020511 A KR1020160020511 A KR 1020160020511A KR 20160020511 A KR20160020511 A KR 20160020511A KR 101769238 B1 KR101769238 B1 KR 101769238B1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/16—Spectrum analysis; Fourier analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0807—Measuring electromagnetic field characteristics characterised by the application
- G01R29/0814—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0878—Sensors; antennas; probes; detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0892—Details related to signal analysis or treatment; presenting results, e.g. displays; measuring specific signal features other than field strength, e.g. polarisation, field modes, phase, envelope, maximum value
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/26—Measuring noise figure; Measuring signal-to-noise ratio
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- Electromagnetism (AREA)
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Abstract
Description
The following embodiments relate to the EMC (Electro Magnetic Compatibility) test in ship, and more particularly to the method and apparatus for evaluating optimum EMC for electrical and electronic equipment mounted on a propulsion system and power system of general ships and offshore plants. will be.
There are many electric and electronic equipments in the ship operation. The test specifications for these devices are based on the IEC-60533 standard. IEC-60533 is divided into three sections, deck and bridge area, general power distribution area, and special power distribution area, depending on the equipment installation area.
Decks and mission areas are the areas where radio equipment is located, such as navigational radar, equipment that transmits and receives AIS, maritime and navigation information in real time, and long-range tracking equipment. And the general power distribution area shall mean the area where the general switchboard is located and most of the area excluding the special power distribution area with the propulsion system and the special power distribution area means the area where the propulsion system,
On the other hand, test decks have been established for deck and bridge areas and general power distribution areas, but the special power distribution areas do not provide evaluation methods and limits for testing. In the case of a product installed in a special power distribution area, there is no test regulation value. Therefore, the company applies the upper limit of the general power distribution area, so that it is designed and manufactured with more specification than the proper specification of the product. It is being invested.
Korean Patent Laid-Open No. 10-2009-0076819 relates to such a ship power distribution and propulsion system, and describes a technology related to a power distribution system that can be used for a ship and a submarine.
The embodiments describe the method of evaluating the EMC of the special power distribution area on the ship, more specifically the propulsion of the equipment of the general ship and the offshore plant, and the technology of the optimum EMC evaluation method for the electric and electronic equipments installed in the power system to provide.
The embodiments provide an EMC testing and evaluation method for electric and electronic equipment mounted on propulsion and electric power systems of general ships and offshore plants, thereby providing a special power distribution zone on board that can prevent waste of research expenses and development expenses to meet regulation specifications And to provide a method and an apparatus for evaluating the EMC of the apparatus.
A method for evaluating EMC (Electro Magnetic Compatibility) of a special power distribution area in a line according to an exemplary embodiment of the present invention includes the steps of measuring a low frequency band having a range lower than a predetermined frequency by using a first receiving antenna by a magnetic field; Converting the measured magnetic field strength of the low frequency band into electric field intensity; And measuring a high frequency band having a predetermined frequency range or more by an electric field using a second receiving antenna, wherein the first receiving antenna and the second receiving antenna are disposed at a predetermined distance from the device under test, Measure noise and radiation noise.
And evaluating EMC conducted noise and radiated noise for the intra-ship special power distribution area by analyzing the measured frequency and the noise result.
Wherein the predetermined frequency is 30 MHz, the reception bandwidth of the low-frequency band of 150 kHz to 30 MHz is 9 kHz, the step of measuring the low-frequency band using a first reception antenna, Or a ferrite rod antenna.
The step of converting the magnetic field strength of the low frequency band to the electric field intensity may include switching the field strength to the electric field intensity by including the coefficient + 51.5 dB for switching the magnetic field intensity to the electric field intensity in the antenna calibration coefficient of the first reception antenna have.
Wherein the predetermined frequency is 30 MHz and the reception bandwidth of the high frequency band is 30 MHz to 2 GHz is 120 kHz, and the step of measuring the high frequency band by using an electric field using the second reception antenna can do.
Wherein the step of measuring the high frequency band by using an electric field using a second reception antenna includes the steps of converting the center height of the second reception antenna at a frequency of 80 MHz or more in a range of 1 to 4 m on the earth surface, . ≪ / RTI >
Measurements in the 156 to 165 MHz band can be repeatedly performed with a receive bandwidth of 9 kHz.
If the device under test consists of more than one device, the interconnecting cable between the main device and the other device may be shorter than the maximum length specified by the manufacturer or less than 20 m.
Wherein the step of measuring the high frequency band using an electric field using a second receiving antenna comprises the steps of: measuring the height of the second receiving antenna and displaying horizontal and vertical polarizations parallel to the ground surface to determine a maximum emission level Can be rotated.
The size of the second receiving antenna may not exceed 20% of the distance from the device under test.
The first receiving antenna and the second receiving antenna may be disposed at a distance of 2 m from the device under test and the center of the antenna may be disposed at an interval of at least 1 m above the ground surface.
The step of evaluating EMC conducted noise and radiated noise for the in-ship special power distribution zone can perform frequency analysis of conducted noise and radiated noise through frequency and emission level using a spectrum analyzer.
In an EMC (Electro Magnetic Compatibility) evaluation apparatus of a special power distribution area on a ship according to another embodiment, an antenna calibration coefficient A first reception antenna having a + 51.5 dB; A second receiving antenna for measuring a high frequency band having a range over the predetermined frequency by an electric field; And a spectrum analyzer for evaluating EMC conducted noise and radiated noise for the in-vessel special power distribution area by analyzing the measured values of the measured frequency and noise, wherein the first receiving antenna and the second receiving antenna And is arranged at a predetermined distance to measure conduction noise and radiation noise.
According to the embodiments, by providing EMC testing and evaluation methods for propulsion of general ships and offshore plants and electric and electronic equipments installed in electric power system, it is possible to provide a special in-ship power source A method and an apparatus for evaluating EMC of a distribution area can be provided.
In addition, according to the embodiments, it is possible to preliminarily review the EMC evaluation of a special power distribution area of an unexamined ship, thereby reducing the ocean cost in ship testing and optimizing EMC evaluation conditions and test conditions .
FIG. 1 is a block diagram for explaining an EMC test in a special power distribution area in a line according to an embodiment.
FIG. 2 is a flowchart illustrating an EMC evaluation method of a special power distribution area in a line according to an embodiment.
FIG. 3 is a graph illustrating EMC characteristics of radiated noise in a ship according to an exemplary embodiment of the present invention.
FIG. 4 is a graph illustrating EMC characteristics of a ship in a conductive noise test according to an exemplary embodiment of the present invention.
Hereinafter, embodiments will be described with reference to the accompanying drawings. However, the embodiments described may be modified in various other forms, and the scope of the present invention is not limited by the embodiments described below. In addition, various embodiments are provided to more fully describe the present invention to those skilled in the art. The shape and size of elements in the drawings may be exaggerated for clarity.
In order to achieve the above object, the EMC evaluation method of the special power distribution area according to the embodiments of the present invention is to evaluate the data measured from the EMC test method, test equipment, Method is provided.
Thus, when the test according to the embodiments is performed, it is possible to accurately analyze the radiated power supply noise in the special power distribution area of the ship.
These embodiments focus on the evaluation of the EMC data measured from the EMC test method, test equipment and test equipment for the propulsion system of the ship and the special power distribution area of the ship on which the equipment is installed for power supply This will be described in detail with reference to FIG.
FIG. 1 is a block diagram for explaining an EMC test in a special power distribution area in a line according to an embodiment.
The EMC test in a special power distribution area on board in accordance with one embodiment may conduct tests on conducted noise and radiated noise. That is, the test elements are conducted noise and radiation noise.
The test for conduction noise is to measure all tests that occur at the power terminals and that are conducted to the ship's power supply and are likely to interfere with other equipment.
The test for radiated noise is a radiated emission test (all equipment other than immersion), a noise test that tests all signals emitted from equipment (other than through the antenna) that may cause interference with other vessel- .
The following test equipment may be used to perform EMC testing in a special power distribution area on board in accordance with an embodiment.
That is, the testing apparatus includes a receiving
The
And can be measured by the magnetic field H over frequencies of 150 kHz to less than 30 MHz through the
At this time, the antenna calibration coefficient of the
Measurements for frequencies above 30 MHz shall be made up of the electric field E and the receiving antenna for measurement shall be a balanced dipole of resonance length as specified in CISPR 16-1, an alternative shortened dipole, or a higher gain antenna .
The size of the
The probe shall be connected for less than the maximum cable length specified by the manufacturer or shorter than 20 m and may be disconnected for impedance simulations of normally connected auxiliary equipment.
The excess length of the cable can be adjusted by tying it in the middle of the cable with a length of 30 to 40 cm, hanging from the connected port in a horizontal plane. If, on the other hand, it is not possible to do so due to the volume or stiffness of the cables, the arrangement of the remaining cables shall be adhered as closely as possible and described in detail in the test report.
A spectrum analyzer (or spectrum analyzer) 120 may perform a frequency analysis of noise with a measuring device that receives a modulated wave and decomposes the sideband, and combines a CRT and a receiver that display the distribution of the frequency spectrum components.
Hereinafter, an apparatus for evaluating EMC of an in-ship special power distribution area used for performing EMC testing in a special power distribution area according to an embodiment will be described in more detail. In detail, the receiving antenna is divided into a first receiving antenna and a second receiving antenna .
An apparatus for evaluating EMC of a special power distribution area in a ship, comprising: a low frequency band having a range lower than a predetermined frequency by a magnetic field; an antenna calibration coefficient of +51.5 dB for converting the measured magnetic field intensity into an electric field intensity; A first receiving antenna, a second receiving antenna for measuring a high frequency band having a range over a predetermined frequency by an electric field, and analyzing a result of the measured frequency and noise to calculate EMC conduction noise and radiation noise for the in- And the first reception antenna and the second reception antenna are disposed at a predetermined distance from the device under test to measure conduction noise and radiation noise.
The first reception antenna may have a low frequency band having a range lower than a predetermined frequency by a magnetic field and an antenna calibration coefficient of +51.5 dB for converting the measured magnetic field intensity into an electric field intensity. At this time, the predetermined frequency is 30 MHz, and the reception bandwidth of the low frequency band of 150 kHz to less than 30 MHz can be 9 kHz.
The first receiving antenna can be measured using an electrically shielded loop antenna or a ferrite rod antenna.
The second reception antenna can measure a high frequency band having a range over a predetermined frequency by an electric field. The predetermined frequency is 30 MHz, and the reception bandwidth of the high frequency band of 30 MHz or more to less than 2 GHz can be 120 kHz.
The second receive antenna may use an equilibrium dipole of resonance length, an alternative short axis dipole, or a higher gain antenna.
The second receive antenna may be rotated to display horizontal and vertical polarizations parallel to the ground surface to adjust the height and determine the maximum emission level.
Especially, at the frequency of 80 MHz or more, the center height of the second receiving antenna can be changed in the range of 1 to 4 m on the ground surface considering the structure of the ship.
And the size of the second receive antenna shall not exceed 20% of the distance from the device under test.
The first receiving antenna and the second receiving antenna are disposed at a distance of 2 m from the device under test, and the center of the antenna may be disposed at an interval of at least 1.0 m above the ground surface.
If the equipment under test consists of more than one unit, the interconnecting cable between the main equipment and the other equipment may be formed to be less than 20 m, or the maximum length specified by the manufacturer.
By analyzing the measured frequency and noise results using a spectrum analyzer, it is possible to evaluate the EMC conducted noise and radiated noise for the special power distribution area in the ship.
FIG. 2 is a flowchart illustrating an EMC evaluation method of a special power distribution area in a line according to an embodiment.
A method for evaluating EMC (Electro Magnetic Compatibility) of a special power distribution area in a line according to an exemplary embodiment includes measuring (210) a low frequency band having a range lower than a predetermined frequency by a magnetic field using a first receiving antenna, A
The method may further include analyzing the measured frequency and noise results to evaluate (240) the EMC conducted noise and radiated noise for the intra-ship special power distribution area.
According to the embodiments, by providing EMC testing and evaluation methods for propulsion of general ships and offshore plants and electric and electronic equipments installed in electric power system, it is possible to provide a special in-ship power source It is possible to provide a method for evaluating EMC of a distribution area.
In addition, according to the embodiments, it is possible to preliminarily review the EMC evaluation of a special power distribution area of an unexamined ship, thereby reducing the ocean cost in ship testing and optimizing EMC evaluation conditions and test conditions .
Hereinafter, each step of the EMC evaluation method of the in-ship special power distribution area according to one embodiment will be described in more detail.
Referring to FIG. 2, the method for evaluating the EMC of the in-ship special power distribution area according to one embodiment can be more specifically explained using an EMC evaluation apparatus of a special power distribution area in a line according to an embodiment. Here, the EMC evaluation method of the in-ship special power distribution area according to an exemplary embodiment may include a first reception antenna, a second reception antenna, and a spectrum as described above.
The EMC evaluation test was carried out for the conducted noise and radiated noise in the Special Power Distribution one where the most electronic equipment is installed most. The frequency range to be measured is 150 kHz ~ 2 GHz.
Wherein the receive bandwidth in the frequency range above 150 kHz to less than 30 MHz can be 9 kHz and the receive bandwidth in the frequency range from 30 MHz to less than 2 GHz can be 120 kHz. On the other hand, the reception bandwidth within the 156 to 165 MHz frequency range can be 9 kHz.
In
For example, the predetermined frequency is 30 MHz, and the low frequency band of 150 kHz to 30 MHz can be measured by the magnetic field using the first reception antenna. That is, the frequency can be measured by a magnetic field H for a frequency of 150 kHz to less than 30 MHz. Wherein the receive bandwidth in the frequency range above 150 kHz to below 30 MHz can be 9 kHz.
The first receiving antenna (i.e., measuring antenna) may be of the form of an electrically shielded loop antenna. Also, the first receiving antenna may be a completely enclosed square with a side length of 60 cm, or a suitable ferrite rod antenna described in CISPR 16-1 may be used.
The first receive antenna is located at a distance of 2 m from the device under test and the center of the antenna can be placed at a distance of at least 1.0 m above the surface of the earth.
In
In other words, by adjusting the antenna calibration coefficient of the first reception antenna to include the coefficient + 51.5 dB for converting the magnetic field intensity into the equivalent electric field intensity, the measured magnetic field intensity can be switched to the electric field intensity.
In
For example, a predetermined frequency is 30 MHz, and a high frequency band of 30 MHz or more to less than 2 GHz can be measured by an electric field using a second reception antenna. That is, measurements for frequencies above 30 MHz can be made by the electric field (E). Wherein the receive bandwidth in the frequency range of 30 MHz to less than 2 GHz may be 120 kHz.
The second receive antenna (i.e., the measurement antenna) may be an equilibrium dipole of resonance length, an alternative short axis dipole, or a higher gain antenna. And the size of the second receive antenna in the EUT direction may not exceed 20% of the distance from the Equipment Under Test (EUT).
The second receive antenna is located at a distance of 2 m from the device under test, and the center of the antenna can be spaced at least 1.0 m above the surface.
In particular, at frequencies above 80 MHz, the height of the center of the second receiving antenna should be able to be converted in the range of 1 to 4 m above the surface of the ship, taking into account the structure of the ship.
In addition, if the equipment under test consists of more than one unit, the interconnection cable (except for microwaves) between the main unit and all other units may be the maximum length specified by the manufacturer or less than 20 m. The required input and output ports shall be connected for a maximum cable length as specified by the manufacturer, or shorter than 20 m, and may be disconnected for impedance simulations of normally connected auxiliary equipment.
The excess length of these cables can be adjusted from 30 to 40 cm in length by hanging them from the connected port to a horizontal plane and tying them in about the middle of the cable. On the other hand, if it is not possible to do so due to the volume or stiffness of the cable, it shall be adhered to the maximum extent and described in detail in the test report.
The height is adjusted only for the second receiving antenna for field (E) measurement and rotated to display horizontal and vertical polarizations parallel to the surface of the earth to determine the maximum emission level. Eventually, the second receive antenna can be rotated to move around the device under test, determine the maximum emission level again, or alternatively, place the device under test at a plane orthogonal to the receive antenna midpoint to obtain the same effect.
In addition, measurements in the 156 to 165 MHz band shall be repeatedly performed with a receive bandwidth of 9 kHz.
Optionally, a peak receiver or frequency analyzer in accordance with the agreement between the manufacturer and the laboratory may be used in the band 156 - 165 MHz.
Thereafter, the measurement result can be analyzed.
In
EMC verification of the product is possible by evaluating EMC radiation and power noise on the ship's special power distribution area.
According to the embodiments, it is possible to prevent wasting of research and development costs to meet specification of regulation values by providing propulsion of general ships and offshore plants, and EMC testing and evaluation methods for electric and electronic equipments installed in power system.
FIG. 3 is a graph illustrating EMC characteristics of radiated noise in a ship according to an exemplary embodiment of the present invention. And FIG. 4 is a graph illustrating EMC characteristics of a ship in a conductive noise test according to an embodiment of the present invention.
FIGS. 3 and 4 show an analysis of the measurement result, and the measured result values are frequency and noise (noise) values.
FIG. 3 shows a graph showing the results of monitoring EMC characteristics for radiated noise (radiated noise) radiated from a special power distribution area of a ship. Frequency, emission level (Level in dBu V / m) can be evaluated in the analysis of radiated noise. In the graph, the spectrum represents the power supply noise emitted per frequency. At this time, the difference between the red level and the blue level is the level of the data that is the reference level in the current power distribution area, and the blue level is the data measured in the EMC evaluation method of the special power distribution area Level.
FIG. 4 shows a graph showing the results of monitoring EMC characteristics for conductive noise in a special power distribution area of a ship. As in the analysis of the radiation noise, frequency and emission level (Level in dBu V / m) are evaluated in the conduction noise analysis. At this time, the difference between the red level and the blue level is the level of the data that is the reference level in the current power distribution area, and the blue level is the data measured in the EMC evaluation method of the special power distribution area Level.
As described above, EMC evaluation of the EMC radiation and power supply noise to the special power distribution area of the ship is possible and EMC verification of the product is possible.
According to the embodiments, it is possible to prevent the waste of the research expenses and the development expenses for matching the specifications of the regulation values.
In addition, it is possible to pre-review the EMC evaluation of the special power distribution area of the unexplored vessel to reduce ocean costs in ship testing and optimize EMC evaluation and test conditions.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.
Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.
Claims (13)
Measuring a low frequency band having a range lower than a predetermined frequency by a magnetic field using a first reception antenna;
Converting the measured magnetic field strength of the low frequency band into electric field intensity;
Measuring a high frequency band having a frequency in a range not less than the predetermined frequency by an electric field using a second reception antenna; And
Evaluating the EMC conducted noise and radiated noise for the in-vessel special power distribution area by analyzing the measured frequency and the noise result
Lt; / RTI >
Evaluating the EMC conducted noise and the radiated noise for the in-ship special power distribution area,
Performing frequency analysis of the radiated noise through analysis of frequency and emission level using a spectrum analyzer to monitor EMC characteristics for radiated noise radiated from the in-vessel special power distribution zone; And
Performing frequency analysis of the conducted noise through analysis of frequency and emission level using a spectrum analyzer to monitor EMC characteristics of conducted noise emitted from the in-ship special power distribution zone
Lt; / RTI >
Wherein the first receiving antenna and the second receiving antenna are disposed at a predetermined distance from the device under test to measure conduction noise and radiation noise
And a method for evaluating the EMC of a special power distribution zone on board.
The step of measuring the low-frequency band by using a magnetic field using the first reception antenna,
The predetermined frequency is 30 MHz, and the reception bandwidth of the low-frequency band of more than 150 kHz to less than 30 MHz is 9 kHz, and measurement is performed using an electrically shielded loop antenna or a ferrite rod antenna
And a method for evaluating the EMC of a special power distribution zone on board.
Wherein the step of converting the magnetic field strength of the low-
The antenna calibration coefficient of the first reception antenna includes a factor of +51.5 dB for switching the field strength to the field strength to switch the field strength to the field strength
And a method for evaluating the EMC of a special power distribution zone on board.
Wherein the step of measuring the high frequency band by an electric field using a second reception antenna comprises:
The predetermined frequency is 30 MHz, the reception bandwidth of the high frequency band of 30 MHz or more to less than 2 GHz is 120 kHz, and measurement is performed using a dipole antenna
And a method for evaluating the EMC of a special power distribution zone on board.
Wherein the step of measuring the high frequency band by an electric field using a second reception antenna comprises:
Converting the center height of the second reception antenna at a frequency of 80 MHz or more in a range of 1 to 4 m on the ground surface in consideration of the structure of the ship
And a method for evaluating the EMC of a special power distribution area on board.
Measurements in the 156-155 MHz band are repeatedly performed with a 9 kHz receive bandwidth
And a method for evaluating the EMC of a special power distribution zone on board.
If the equipment to be tested consists of more than one equipment, the interconnecting cables between the main equipment and the other equipment shall be of a maximum length specified by the manufacturer or shorter than 20 m
And a method for evaluating the EMC of a special power distribution zone on board.
Wherein the step of measuring the high frequency band by an electric field using a second reception antenna comprises:
The height of the second receiving antenna is adjusted and rotated to display horizontal and vertical polarizations parallel to the surface of the earth to determine the maximum emission level
And a method for evaluating the EMC of a special power distribution zone on board.
The size of the second receiving antenna is not more than 20% of the distance from the device under test
And a method for evaluating the EMC of a special power distribution zone on board.
The first receiving antenna and the second receiving antenna are disposed at a distance of 2 m from the device under test and the center of the antenna is disposed at an interval of at least 1 m above the surface of the earth
And a method for evaluating the EMC of a special power distribution zone on board.
A first receiving antenna having an antenna calibration coefficient of +51.5 dB for measuring a low frequency band having a range lower than a predetermined frequency by a magnetic field and for converting the measured magnetic field intensity into an electric field intensity;
A second receiving antenna for measuring a high frequency band having a range over the predetermined frequency by an electric field; And
A spectrum analyzer for evaluating EMC conducted noise and radiated noise for the in-ship special power distribution area by analyzing the measured frequency and noise results
Lt; / RTI >
Wherein the spectral unit comprises:
In order to monitor the EMC characteristics of the radiated noise radiated from the special power distribution area in the ship, the frequency analysis of the radiated noise is performed through analysis of the frequency and the emission level, and the EMC of the conducted noise emitted from the special power distribution area To analyze the characteristics, frequency analysis of conducted noise is performed through analysis of frequency and emission level,
Wherein the first receiving antenna and the second receiving antenna are disposed at a predetermined distance from the device under test to measure conduction noise and radiation noise
And an EMC evaluation device for a special power distribution area on the ship.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109858360A (en) * | 2018-12-28 | 2019-06-07 | 华中科技大学 | A kind of dynamic management approach and system of fleet's electromagnetic compatibility |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101467171B1 (en) | 2013-06-24 | 2014-12-01 | 주식회사 이레테크 | Electromagnetic measurement system and signal processing apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101467171B1 (en) | 2013-06-24 | 2014-12-01 | 주식회사 이레테크 | Electromagnetic measurement system and signal processing apparatus |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109858360A (en) * | 2018-12-28 | 2019-06-07 | 华中科技大学 | A kind of dynamic management approach and system of fleet's electromagnetic compatibility |
| CN109858360B (en) * | 2018-12-28 | 2020-09-18 | 华中科技大学 | Dynamic management method and system for electromagnetic compatibility of fleet |
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