• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• v.29 no.1
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• pp.141-146
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• 2005

Recently, the accidents on the sea have arisen due to the increase of the nautical traffic and the digitization of equipments for marine. Therefore, IMO(International Maritime Organization) have provided the recommendation of EMI and EMS for radio communication and equipments of marine from SOLAS cobvention at July 1st 2002. In this paper, we measured EMC environment on the HANBADA, which is Korea Maritime University training ship, for basic EMC environment of a ship. The measuring point was Bridge and Engine Control Room of the ship, we measured the test point that was set at random. Measured Band is from 30 MHz to 2 GHz, polarization measurement is processed both vertical and horizontal polarizaion. We analysed the results in consideration of permissible criteria.

• Journal of the Institute of Electronics Engineers of Korea TE
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• v.39 no.2
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• pp.76-83
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• 2002

In this paper, we developed the real-time automation program for the immunity test according to the determination of the EUT image, and analyzed the image of standard PC monitor and the monitor image affected by the electromagnetic field. The image change detection algorithm was realized for the real-time determination of the malfunction, and we attempted to obtain the consistent results for the electromagnetic immunity measurement. We showed the possibility to determine the immunity of the PC monitor and other equipment by performing the image change detection of EUT, and the experimental results for the EUT immunity determination of EMS (Electro-Magnetic Susceptibility, IEC 61000-4-3) are also proposed in line with the international standard and domestic trends. 

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.25 no.10
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• pp.1020-1027
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• 2014

ISO 26262 is applied to vehicle and electrical/electronic component manufacturers for minimizing car accidents and life damage by the extended use of electronic control equipments and their malfunctions. In this standard, safety requirements are required to be applied from the early stage of development upto manufacture and disposal stages throughout the total lifecycle of the full vehicular system, and electromagnetic compatibility must be also managed as an important consideration factor. Therefore, it is nowadays very necessary to research and develop EFS(EMC for Functional Safety) to be applied in each stage of the design, manufacture, accreditation, use, maintenance stages of cars. In this paper, how EFS can be applied for the application of ISO 26262 is described. By the enforcement of this suggestions into the legal requirement or New Car Assessment Program(NCAP) test items, it is necessary that car manufacturer have to perform some procedures for ensuring car safety by themselves.

• The Journal of the Korea Contents Association
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• v.11 no.9
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• pp.26-44
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• 2011

The Study was carreid out to see whether the intensity of electromagnetic waves in each floor of a building where the sharing base station has been established is harmful to a human body, and to expect the intensity of the waves in the building. The investigate was performed on both of sharing base station either with many scatterers or without any of them. To satisfy the international standard and the domestic TTA standard, rms for each of the electromagnetic wave of every floor in the building with the station was measured from 3 location of 3 heights(1.1m,1.5m, and 1.7m). Max of the measured rsm from the each of the frequencies in the nine location was confirmed to be 48.12%(the rooftop measured value) at most, compared to the human body protection standard. The value was confirmed to satisfy the human body protection standard for each frequency. And the total value of the calculated exposure indexes for each frequency was determined to be more than 7 times lower at most, which was 0.1445, compared to the 1 standard. Since P value in both of 868MHz and 2.14GHz electromagnetic waves intensity for each base station and floor was less than 0.05, it was revealed to be meaningful, and since R-Sq(adj) value showed a value more than 50%, the regression equation was determined to fully absorb the data information. However, although the P value of both of 868MHz and 2.14GHz electromagnetic waves intensities under the integrating terms of the base station data and the floor data was showed to be less than 0,05, since R-Sq(adj) value of 868MHz electromagnetic waves intensity presented a value smaller than 50%(34.15%), it was determined that the 868MHz electromagnetic waves intensity is very much influenced by an environment with a base station. Because the electromagnetic waves intensity of 2.14GHz show R-Sq(adj) value bigger then 50%(51.8%), The regression equation model of 2.14GHz electromagnetic waves intensity was confirmed to be proper. It also turned out not to be effected by the surrounding environment near a building with the base station and the intensity of electromagnetic waves for each floor of such building was expectable by the regression equation.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.625_626
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• 2009

전력선통신 기술은 전력선로 자체를 통신선로로 이용함으로서 전력회사에서 전력설비의 원격 감시 혹은 제어에 활용하기 매우 손쉬운 장점이 있다. 특히, 최근 부각되는 지구온난화에 대비한 에너지 절감 및 온실가스 감축을 위한 중요한 방편으로 인식되는 원격검침시스템을 전력선통신을 이용하여 구축할 경우, 경제적, 기술적으로 우수한 장점을 지닌다. 원격검침을 위해서는 일반적으로 기계식 전력량계를 전자식 전력량계로 교체하여야 하며, 전자식 전력량계가 인접한 전력선통신모뎀에 미치는 영향에 대해서는 연구된 바가 거의 없다. 따라서 본 논문에서는 전력량계가 미치는 잡음이나 삽입손실 등에 대한 특성을 시험 분석하고 전송특성에 어떻게 영향을 미치는 지 분석하여, 이를 바탕으로 전자식 전력량계의 규격 기준을 마련하고자 한다.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.1324-1325
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• 2008

근래 선진 중전기 메이커에서는 차단기, GIS 등의 전통적인 단품 위주에서 탈피하여 전력 IT 기술을 접목한 전력기기/변전소 자동화를 강력하게 추진하고 있다. 특히 전체 변전소를 감시, 제어, 계측, 보호할 수 있도록 전력 IT 기술을 기반으로 한 IEC 61850 적용 변전소 종합 자동화 시스템 개발에 역량을 집중하고 있다. 본 논문에서는 당사에서 개발한 최신 IT 기술을 적용한 IEC 61850 기반 170㎸ GIS용 Bay Controller 관련 구성, 기능, 성능시험 결과에 대해 기술하며, 변전소 내 노이즈로 인해 유발될 수 있는 전자장치 오동작 등을 보증하기 위해 실시한 전자파 장해시험 결과와 GIS와 동일한 환경에 설치되므로 온/습도, 진동/충격시험을 관련 국제규격인 IEC 60255-6, IEC 60255-21-1, 2, 3에 의거하여 실시한 내용을 기술하도록 한다.

• Journal of the Korean Institute of Navigation
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• v.22 no.4
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• pp.45-50
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• 1998

A recently constructed commercial ship is a complexive integrated system like a small city in which has a generator, power distributing facilities, various radio equipments and high power circuit breakers are installed. Therfore it could make a malfunction of the microprocessor in the various control units which are so important during the ocean voyage of larger ship. This paper has studied whether is properly required or not on the view of the actual electro magnetic compatibility status on the electromagnetic interference and suceptibility test requirments listed on the IACS (International Association of the Classification Society). Through these results, we are looking forward to the new suggestions of the Electro Magnetic Compatibility test in order to reduce the malfunction in the ship regarding test item, test level, and test condition.

• Proceedings of the KIEE Conference
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• 2006.07c
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• pp.1482-1483
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• 2006

고전압 방전시험 장치는 국제전기기술위원회 규격(IEC 61000-4-2)에서 규정하고 있는 콘덴서 방식을 사용하며, 매우 짧은 시간에 방전함으로서 펄스 형태의 방전전류가 통전된다. 이러한 정전기적인 방전에 의해 전자기기에 고장을 발생시키며 이를 검증하는 방법으로 정전기 내성시험법이 있다. 본 논문에서는 첫째로 방전장치가 발생하는 잡음 전계량을 측정하였고, 둘째로 방전장치를 시험시료에 근접하는 방법에 따른 시험시료에 미치는 영향을 실험을 통해 검증하였고, 셋째로 근접방법에 따른 정전유도 현상이 시험시료에 미치는 영향을 실험적으로 검증하였다. 이러한 세 가지 현상을 바탕으로 시험시료가 고전압 방전장치를 근접 방전하여 방전을 유발시켰을 때의 전자파의 영향에 내성을 갖고 있는지를 검증하는 새로운 시험방법을 제안하였다.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.25 no.5
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• pp.548-558
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• 2014

EMP(Electromagnetic Pulse) protection facility was evaluated according to standard of shielding effectiveness. To comply with the standard, transmitting antenna was placed on outside of protection facility and receiving antenna was placed on inside of protection facility. However, measurement is impossible that place does not have enough space between protection facility and external concrete structure. In this paper, we performed a various of tests that put transmitting antenna inside the EMP protection facility in order to find out test method for measuring the shielding effectiveness of electromagnetic wave. Transmitting antenna was placed on inside of the EMP protection facility for measuring the shielding effectiveness to compare and analyze the impact of the position regarding to the transmitting and receiving antenna. As a result of test, in case that transmitting antenna was placed on inside of the EMP protection facility, it was found that test frequency range 10 kHz~1 GHz were occurred overall average difference of ${\pm}4$ dB level.

• Journal of the Korea Concrete Institute
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• v.29 no.2
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• pp.169-177
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• 2017

Rather than causing damage from heat, blast, and radiation of a regular nuclear weapon, recently, it is predicted that North Korea has been inventing high altitude electromagnetic pulse (HEMP) missile in order to incapacitate electronic equipment. HEMP shielding facility is used for military purpose today. Despite the electromagnetic shielding effects from high quality compression plates, problems may include such as the possibility of electromagnetic influx resulting in the welding of the compression plates, and difficulties and high cost of construction. Therefore, in this study, a high electrical conducting material was added to the concrete experimental subject to ensure the shielding effect through electromagnetic waves to for the concrete structure, instead of building a shielding facility separately for the structure. Also, among the experimental subjects, 100 ${\mu}m$ of Iron-Aluminum alloy metal spraying coat was applied to two types with the highest shielding effect, and to two types with the lowest shielding effect. The result of the experiment indicates that experimental subjects added with a high electrical conductivity material did not meet the minimum shielding criteria of MIL-STD-118-125-1 standard, but all the experimental material applied to the metal spraying coating satisfied the minimum shielding criteria. In conclusion, it is considered that 100 µm of Iron-Aluminum alloy metal spraying coat contains high efficiency in the HEMP shielding.