• Geomechanics and Engineering
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• 제13권6호
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• pp.997-1010
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• 2017

The black box model is a relatively new option for nonlinear dynamic system identification. It can be used for prediction problems just based on analyzing the input and output data without considering the changes of the internal structure. In this paper, a black box model was presented to solve unconstrained overlying strata movement problems in coal mine production. Based on the black box theory, the overlying strata regional system was viewed as a "black box", and the black box model on overburden strata movement was established. Then, the rock mechanical properties and the mining thickness and mined-out section area were selected as the subject and object respectively, and the influences of coal mining on the overburden regional system were discussed. Finally, a corrected method for height prediction of the fractured zone was obtained. According to actual mine geological conditions, the measured geological data were introduced into the black box model of overlying strata movement for height calculation, and the fractured zone height was determined as 40.36 m, which was comparable to the actual height value (43.91 m) of the fractured zone detected by Double-block Leak Hunting in Drill. By comparing the calculation result and actual surface subsidence value, it can be concluded that the proposed model is adaptable for height prediction of the fractured zone.

• 한국안전학회지
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• 제32권6호
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• pp.22-28
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• 2017

According to the National Fire Data System (NFDS), more than 5,000 vehicle fires have occurred every year for the last 10 years. Vehicle fires are primarily caused by mechanical (breaking system and engine), electrical (wiring and battery), and chemical (oil and fuel gas leakage) problems. The electrical factor has increased with the installation of driver convenience equipment. For example, today, the black box is widely used to provide video data recording of motor vehicle accidents. The black box consists of a front camera, rear camera, and wires. The black box wires are directly connected to the junction box or fuse box from the start battery that operates to provide normal on power supplying for engine stop. It is extremely dangerous when the wires short circuit due to insulation aging, mechanical and electrical stress, etc. In this study, the black box wiring fire risk have been analyzed and investigated when the steady state and abnormal operations, and under the following conditions: wiring arrangements with a high temperature condition, insulation aging, poor contact, and short circuits. The results showed that black box wiring short circuits had a higher fire risk than the other fire hazard elements. To prevent fire hazards caused by black box wiring, the black boxes must be installed by qualified service personnel. Do not modify the wiring, remove the fuse and secure the wiring using cable ties or insulation tape.

• 전기전자학회논문지
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• 제22권1호
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• pp.168-173
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• 2018

본 논문에서는 고정된 전후방의 영상 촬영으로 사각 지대의 위험에 노출된 기존의 블랙박스가 가지고 있는 한계를 극복하고자 측면의 물체를 감지하여 촬영할 수 있는 새로운 지능형 블랙박스를 제안한다. 차량의 측면 사각지대 촬영을 보완하기 위해서 적외선 거리 센서를 이용하여 차량에 접근하는 물체를 감지하고 블랙박스가 자동으로 해당 대상물을 향해 회전하는 지능형 블랙박스의 알고리즘을 제안한다.

• 전기학회논문지P
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• 제67권3호
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• pp.160-167
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• 2018

In this paper, a black box, which is provided the reliability and user safety of home battery energy storage system connected with solar energy generation, is developed. In the developed scheme, a status and diagnosis data of battery management system, power conditioning system, solar energy generation and grid is measured. This status and diagnosis data is stored and displayed in the developed black box. In addition, this status and diagnosis data is stored and displayed in a monitoring system and a smart phone of user. A performance evaluation of the developed black box is carried out using emulator of home battery energy storage system connected with solar energy generation. Consequently, the developed black box is proved its superiority of the reliability and user safety.

• 전기학회논문지
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• 제65권7호
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• pp.1295-1302
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• 2016

In this paper, a black box, which is provided the reliability and user safety of home battery energy storage system connected with solar energy generation, is developed. In the developed scheme, a status and diagnosis data of battery management system, power conditioning system, solar energy generation and grid is measured. This status and diagnosis data is stored and displayed in the developed black box. In addition, this status and diagnosis data is stored and displayed in a monitoring system and a smart phone of user. A performance evaluation of the developed black box is carried out using emulator of home battery energy storage system connected with solar energy generation. Consequently, the developed black box is proved its superiority of the reliability and user safety.

• 대한교통학회지
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• 제25권3호
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• pp.29-43
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• 2007

차량용 블랙박스는 교통사고 예방 및 원인 규명을 위해 충분한 정보를 제공하고, 그 정보 데이터베이스는 개인의 사생활 침해를 최소화하는 범위에서 적절하게 공개되어 전 국민에게 다양한 서비스를 제공할 수 있다. 따라서 차량용 블랙박스는 정부 기관이나 보험 업체뿐만 아니라 관련 업계 전체에 긍정적 파급 효과가 큰 지능형 요소 부품이다. 본 논문에서는 차량용 블랙박스의 도입이 추진되고 있는 현 상황에서 차량용 블랙박스의 기술적 내용과 국내외 기술 현황을 조사하고, 국내외에서 출원된 특허 분석을 통하여 차량용 블랙박스에 대한 특허 출원 현황 조사 결과와 핵심 특허 기술의 심층 분석 내용을 제시한다. 또한, 국내외에서 진행되고 있는 표준화/법제화 동향 등을 서술하고, 이에 대한 대응방안으로서 표준화 제정 및 블랙박스 제품기술 개발 방안들을 함께 제시한다.

• 한국정보통신학회논문지
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• 제17권10호
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• pp.2352-2358
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• 2013

본 논문에서는 보다 효율적으로 블랙박스 영상을 활용하기 위하여 무선 통신 모듈을 포함하는 블랙박스 단말과 클라우드 서버를 설계하고 구현하였다. 제안하는 시스템은 통합 CCTV 관리 시스템과 같이 모든 자동차의 블랙박스 영상을 저장하고 관리하여 객체별, 시간별, 장소별 검색을 할 수 있다.

• 한국CDE학회논문집
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• 제21권4호
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• pp.443-452
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• 2016

This paper proposes a method for expensive black box optimization using radial basis functions (RBFs). The proposed algorithm is a computational strategy that uses a RBF model approximating the expensive black box function to predict an optimum. First, a RBF-based approximation technique is introduced and a sampling plan for estimation of the black box function is described. Then the proposed algorithm is explained, which presents the pseudo-codes for implementation and the detailed description of each step performed in the optimization process. In addition, numerical experiments will be given to analyze the performance of the proposed algorithm, by investigating computation accuracy, number of function evaluations, and convergence history. Finally, geometric distance problem as application example will be also presented for showing the algorithm applicability to different engineering problems.

• 한국자동차공학회논문집
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• 제12권2호
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• pp.205-214
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• 2004

This paper presents design concepts, specifications and performances of a newly developed Black Box, the reconstruction analysis tool with the records, and results of validation tests. The Black Box can detect crash accidents automatically, and record the vehicle's motion and driver's maneuvers during a pre-defined time period before and after the accident. The items of the Black Box included the acceleration, yaw-rate, vehicle speed, engine RPM, braking application, steering and several digital inputs for recording driver's maneuvers. To detect the accident-related-crash, it is important to understand characteristics of the crash signal, which are much different from those of normal driving. Therefore, analytical considerations should be taken in designing pre-filtering circuits and selecting appropriate parameters for identifying crash accidents. And, it is necessary to select proper combination of motion sensors and design proper pre-filtering circuits in order to describe the vehicle's motion. The analysis algorithms were developed and implemented which can perform accurate detection of crash accidents, simulating pre-crash trajectories, and calculating parameters for reconstruction analysis of crash accidents. The developed Black Box was installed on passenger cars and several types of validation tests were conducted. Through the tests, the accuracy of the recorded data and usefulness of the analysis tool for reconstruction have been validated.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2013년도 춘계학술대회
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• pp.290-293
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• 2013

끊이지 않는 차량 인명피해 사고들로 인해, 그 원인을 분석하고 방지하는 장치 및 기술들이 다양하게 나오고 있다. 그 중에서 대표적으로 블랙박스 및 후방카메라 등이 있다. 이러한 기술이 발전함에도 불구하고 차량 인명사고가 계속 발생하고 있다. 그 이유는 운전자의 부주의나 차량이 후진 시에 사람이 갑자기 차량의 뒤로 지나가거나 기존의 후방 감지시스템이 어린이들을 제대로 감지하지 못하였기 때문이다. 따라서 본 논문은 사고를 방지하기 위한 Kinect를 이용한 후방 카메라와 사고의 원인을 정확하게 밝혀주는 블랙박스를 통합한 후방 블랙박스 시스템을 설계하고자 한다.