• 융합보안논문지
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• 제13권2호
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• pp.75-84
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• 2013

일본은 방범설비협회가 중심이 되어 표준화 문제, 설치기준문제, 자격제도 운영 등을 주도하고 있다. 즉, 이 협회는 기계경비업자, 제조업자, 시공업자 등이 가입하여 방범기기, 방범시스템, 정보시큐리티 시스템에 관한 조사, 연구를 하고 있다. 그리고 방범설비에 종사하는 자의 연수, 방범설비 보급 등을 통해 범죄를 방지하고 국민생활의 안전에 공헌하고 있다. 그리고 방범기기에 대한 연구와 표준화로 방범설비협회가 제정한 기술기준과 시공기준을 업무에 적용하고 있는 실정이다. 아울러 방범설비협회를 중심으로 우량방범기기인정제도(RBSS: Recognition of Better Security System) 등을 시행하고 있다. 또 방범설비사와 종합방범설비사 자격제도를 도입하여 방범기기 설치 및 제조자의 능력을 향상시키고 생산기술 향상을 도모하고 있다. 그러나 우리나라의 경우는 경비업법에 따라 한국경비협회가 중심을 이루고 있지만, 경비시장의 중추를 이루고 있는 기계경비업체는 참여가 거의 없는 실정이다. 그렇다고 기계경비업체나 방범기기 제조업체와 설비업체들이 함께 할 수 있는 조직이 있는 것도 아니기 때문에 방범기기에 대한 통합된 노력을 할 수 없는 환경이다. 따라서 본 연구의 목적은 일본의 시큐리티산업과 방범설비산업의 현황 및 방범설비협회의 사업과 운영 등을 살펴보고 한국에 적용할 수 있는 시사점을 제시하는 것이다.

• Transactions on Electrical and Electronic Materials
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• 제12권3호
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• pp.98-101
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• 2011

A 10 nm nano-silica was introduced to a conventional 3 ${\mu}M$ micro-silica composite to develop an eco-friendly new electric insulation material for heavy electric equipment. Thermal and mechanical properties, such as glass transition temperature (Tg), dynamic mechanical analysis, tensile and flexural strength, were studied. The mechanical results were estimated by comparing scale and shape parameters in Weibull statistical analysis. The thermal and mechanical properties of conventional epoxy/micro-silica composite were improved by the addition of nano-silica. This was due to the increment of the compaction via the even dispersion of the nano-silica among the micro-silica particles.

• 한국안전학회지
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• 제12권1호
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• pp.29-36
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• 1997

Precision electronic equipments for outdoor use are composed of sophisticated microcircuits that are extremely vulnerable to lightning-caused voltage spike. This transient voltage spike may cause upset, latent failure or Interference on electronic equipments. In order to develop efficient lightning protection measures on AC power lines of a road traffic controller as a electronic equipment for outdoor use, experimental surge immunity tests were conducted according to IEC standard 801-5. The combination of gas tube arrester and metal-oxide varistor was installed at the input of AC power lines and the silicon avalanche suppressor installed at the output of DC power supply for the lightning protection measures.

• 반도체디스플레이기술학회지
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• 제19권3호
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• pp.43-48
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• 2020

The demand for stable plasma has been on the rise because of the increased delivery power amount in the chamber for improving productivity, and fast and accurate plasma impedance matching become a crucial performance measure for radio frequency (RF) power system in semiconductor manufacturing equipment. In this paper, the overall impedance matching was understood, and voltage and current values were extracted with voltage - current (VI) probe to measure plasma impedance in real-time. Actual matching data were analyzed to derive calibration coefficient for V and I measurements to understand the characteristics of VI probe, and we demonstrated the tendency of RF impedance matching according to changes in load impedance. This preliminary empirical research can contribute to fast RF matching as well as advanced equipment control for the next level of detailed investigation on embedded system based-RF matching controller.

• 한국전자통신학회논문지
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• 제8권12호
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• pp.1905-1910
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• 2013

논문은 유도 루프식 열차제어시스템에 대하여 준 정량적 안전무결성 등급(Safety Integrity Level : SIL)할당 방법을 적용하여 안전무결성 등급을 할당한 결과이다. 유도 루프식 열차제어시스템은 ATS장치, 지상ATP장치, 차상ATP장치, 지상ATO장치, 차상ATO 지상장치 하드웨어 및 소프트웨어로 구성되어 있으며, 안전무결성 등급 할당은 각 서브시스템에 대한 안전무결성 등급을 의미한다. 준 정량적 방법의 세 원칙에 근거하여, 열차제어시스템을 구성하고 있는 서브시스템에 대한 안전무결성 등급을 할당하였다.

• 한국전자통신학회논문지
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• 제12권2호
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• pp.361-366
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• 2017

산업체 전반의 주요 설비에서 이상 상태는 온도의 이상 상승, 진동과 소음의 변화를 수반하여 나타나게 된다. 본 연구에서는 BLE 를 탑재한 스마트 센싱 모듈를 개발하고, MEMS 기반의 가속도 센서를 인터페이스하여, 설비의 자체결함으로 인한 이상진동을 감지할 수 있는 스마트 센싱 디바이스를 개발하였다. 본 연구에서 개발한 스마트 센싱장치는 좁은 공간에 쉽게 설치하여, 설비의 진동상태를 실시간으로 모니터링 할 수 있으며, 어레이 LED 디스플레이로 정상상태와 문제 발생상태를 간편하게 사용자에게 알려줄 수 있다.

• International Journal of Safety
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• 제9권2호
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• pp.35-40
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• 2010

Many casualties are being occurred due to many misses the railway platform, and the accident occurrence is being increased. Recently in Korea, efforts to prevent casualties fundamentally are being made by installing and operating the PSD(Passenger Screen Door) as to prevent these casualties of passengers. However, in case of the PSD system, although it can solve the problem of public casualties at platform fundamentally, it is impossible to install it at whole railway platforms. This paper proposes the safety equipment using LaserRadar sensor for the prevention against casualties of passengers at platform. The safety equipment using novel sensor is the safety equipment making an approaching train stopped if the falling object is a person by detecting the obstacle at platform, and it has the merit possible to apply it to platform since it may detect accurately under ambient environmental elements such as the snow, rain and yellow dust, etc. also. We manufactured a prototype of the safety equipment to reduce public casualties at platform by using LaserRadar sensor and carried out its performance test, and the result is presented in this paper.

• 반도체디스플레이기술학회지
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• 제18권4호
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• pp.40-45
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• 2019

The smart factory has developed with the help of several technologies such as automation, artificial intelligence, big data, smart sensors and communication protocols. The Internet of things(IOT) among communication protocols has become the key factor for the seamless integration of various manufacturing equipment. Therefore, it is important that the IOT cooperate with the standards of communication protocols proposed by the SEMI in the semiconductor industry. In this paper, we suggest a novel reference model of the communication protocols for semiconductor equipment by introducing an IOT service layer. With the IOT service layer, we can use the functions and the additional services provided by the IOT standards that give the inter-operability between factory machines and host computers. We implement the standard of the communication protocols for semiconductor equipment with the IOT service layer by using ns3 simulator. It concludes that it is necessary to provide the platform for the IOT service layer to deploy efficiently the proposed reference model of the communication protocols.

• 드라이브 ㆍ 컨트롤
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• 제16권3호
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• pp.59-66
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• 2019

Hydraulic systems are essential for most of the construction equipments due to their various advantages, such as very powerful, quick response speed, precision control and remote control. Moreover, they are necessary to apply the electro hydraulic systems for precise and remote controls. Operating the small electronic joystick of the remote controller for the control of a multipurpose work machine with remote control technology increases the possibility of a sudden operation compared to the use of a conventional hydraulic joystick. When a joystick is suddenly operated, the peak pressure is generated in the system due to the quick response of the system. Then a vibration is generated due to the peak pressure, which causes instability to the operation of the construction equipment. Therefore, in this study, we confirmed the level of reduction of peak pressure occurring in the electro hydraulic system by using AMESim, when the output signal of the step shape generated by the sudden operation of the electronic joystick was changed by using the convolution operation.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.417-422
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• 2008

The DC high speed circuit breaker used in Seoul Metro for line no.1.2 is Japan HITACHI and FUJI breaker, and for line no.3.4 is Whipp & Bourne MM74 breaker from UK. The years that each breakers made are 1973(line no.1), 1984(line no.3.4), So that equipments are superannuated. Nowday the for equipment exchanging is executing, equipment for exchanging were used the Secheron breaker from Swiss. but now the Intec breaker made in Korea is used. The RTU of supervisory control and data acquisition system have the capabilities that can observe, control and work the installation efficiently. In this paper, as summarizing the solving process of problem that happened the SCADA system when old-equipment exchange and concerned point for logical supervision and control of reservation factors and equipment, I'll provide the direction that can do receiving-process of control-equipment, progressed with the exchange of old-electronic equipment.