• Title/Summary/Keyword: 실시간 검사

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Impact of Dynamic Voltage Scaling on Real-time Schedulability Analysis (동적 전력 관리 기법의 실시간 태스크 스케줄 가능 검사 영향 분석)

  • Yoo, See-Hwan;Yoo, Chuck
    • Proceedings of the Korean Information Science Society Conference
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    • 2008.06b
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    • pp.509-514
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    • 2008
  • 동적 전력 관리 기법은 임베디드 시스템과 같은 저전력성이 요구되는 시스템에서 널리 활용되고 있다. 동적 전력 관리 기법은 처리율과 소비전력 간의 상관 관계를 통해, 프로세서의 전압과 주기를 조절하여 소비 전력당 처리율을 높이는 기법이다. 이러한 동적 전압 관리 기법이 실시간 특성이 필요한 임베디드 시스템에 적용되는 경우, 실시간 스케줄러에 큰 영향을 끼치게 된다. 실시간 스케줄러에서는 주어진 임계 시간 이내에 작업의 수행을 마치기 위하여, 스케줄 가능성 테스트를 수행하여 적합한 작업들만을 실행하도록 한다. 하지만, 인터럽트 처리 등으로 인한 선점 가능성은 스케줄 가능성에 대한 분석을 복잡하게 만들고 있다. 본 논문에서는 인터럽트 처리를 고려한 실시간 스케줄링 분석 연구를 기반으로 하여, 동적 전력 관리가 추가된 경우의 영향을 분석하도록 한다. 동적 전력 관리로 인한 실시간 처리 요구 사항의 증가와 실제 적용 가능한 사례를 보인다.

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Parallel Intersection Detection Algorithm using CUDA (CUDA 를 이용한 가상 객체들간의 병렬 충돌 검사 알고리즘)

  • Lee, Yeon-Hee;Kim, Young-J.
    • 한국HCI학회:학술대회논문집
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    • 2008.02a
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    • pp.451-455
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    • 2008
  • In this paper, we present how we implement the low-level, triangle intersection routine in a massively parallel fashion using n VIDIA's new GPGPU language, CUDA. Triangle intersection often becomes a computational bottleneck in the collision detection problem. Due to the relatively low bandwidth between CPU and GPU, it has been challenging to implement efficient, object-space collision detection between triangle sets. However, thanks to the improved data transmission rates in CUDA architecture, in this paper, we improved the performance of triangle intersection substantially better than the optimized CPU counterpart.

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Realtime Identification of the Propagation Direction of Received Echoes in Long-Range Ultrasonic Testing (원거리 초음파검사에서 수신에코 진행방향의 실시간 식별)

  • Choi, Myoung Seon;Heo, Won Nyoung
    • Journal of the Korean Society for Nondestructive Testing
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    • v.33 no.1
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    • pp.69-72
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    • 2013
  • In long-range ultrasonic testing, a phased array probe composed of multiple identical transducers with an uniform interval of one quarter wavelength is usually used for the transmission or reception directivity control. This paper shows that the propagation directions of individual echoes can be identified in real time by displaying the inputs of a process for summing the constitution reception signals after compensating the phase difference due to the transducer interval, together with the output of the process. A constructive interference of the constitution echoes indicates a forward direction echo propagating along an intended direction while a destructive interference implies a reverse direction echo propagating along the direction opposite to the intended one.

Nondestructive Testing and Applications for Electric Power Plant Equipments by Acoustic Emissin Technology (음향방출기술에 의한 발전설비 비파괴검사 및 응용)

  • Lee, Sang-Guk
    • Journal of the Korean Society for Nondestructive Testing
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    • v.24 no.4
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    • pp.396-409
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    • 2004
  • Diagnosis f structural integrity is the basis for correct treatment of and countermeasures against progressive structural abnormalities. An exact diagnosis is at present the most reliable means for determining the soundness of structures during power plant operations. Acoustic emission(AE) technology has recently strengthened its application base, and practitioners' understanding of the technique's fundamentals. This paper presents the results of a survey and assessment on AE monitoring applications in nuclear, fossil and hydraulic power plant. The main objective of this paper was to obtain information on various applications of AE technology in electric power plant.

(Real Time Classification System for Lead Pin Images) (실시간 Lead Pin 영상 분류 시스템)

  • 장용훈
    • Journal of the Korea Computer Industry Society
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    • v.3 no.9
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    • pp.1177-1188
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    • 2002
  • To classify real time Lead pin images in this paper, The image acquisition system was composed to C.C.D, image frame grabber(DT3153), P.C(PentiumIII). I proposed image processing algorithms. This algorithms were composed to real time monitoring, Lead Pin image acquisition, image noise deletion, object area detection, point detection and pattern classification algorithm. The raw images were acquired from Lead pin images using the system. The result images were obtained from raw images by image processing algorithms. In implemental result, The right recognition was 97 of 100 acceptable products, 95 of 100 defective products. The recognition rate was 96% for total 200 Lead Pins.

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Local Model Checking for Verification of Real-Time Systems (실시간 시스템 검증을 위한 지역모형 검사)

  • 박재호;김성길;황선호;김성운
    • Journal of Korea Multimedia Society
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    • v.3 no.1
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    • pp.77-90
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    • 2000
  • Real-Time verification is a procedure that verifies the correctness of specification related to requirement in time as well as in logic. One serious problem encountered in the verification task is that the state space grows exponentially owing to the unboundedness of time, which is termed the state space explosion problem. In this paper, we propose a real-time verification technique checking the correctness of specification by showing that a system model described in timed automata is equivalent to the characteristic of system property specified in timed modal-mu calculus. For this, we propose a local model checking method based on the value of the formula in initial state with constructing product graph concerned to only the nodes needed for verification process. Since this method does not search for every state of system model, the state space is reduced drastically so that the proposed method can be applied effectively to real-time system verification.

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A Study on Real-Time Fault Monitoring Detection Method of Bearing Using the Infrared Thermography (적외선 열화상을 이용한 베어링의 실시간 고장 모니터링 검출기법에 관한 연구)

  • Kim, Ho-Jong;Hong, Dong-Pyo;Kim, Won-Tae
    • Journal of the Korean Society for Nondestructive Testing
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    • v.33 no.4
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    • pp.330-335
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    • 2013
  • Since real-time monitoring system like a fault early detection has been very important, infrared thermography technique as a new diagnosis method was proposed. This study is focused on the damage detection and temperature characteristic analysis of ball bearing using the non-destructive infrared thermography method. In this paper, for the reliability assessment, infrared experimental data were compared with the frequency data of the existing. As results, the temperature characteristics of ball bearing were analyzed under various loading conditions. Finally it was confirmed that the infrared technique was useful for real-time detection of the bearing damages.

07년 상반기 타이어 안전검사 및 설문조사 결과

  • Korea Tire Manufacturers Association
    • The tire
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    • s.232
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    • pp.33-37
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    • 2007
  • 우리협회에서는 타이어 정비불량으로 인한 교통사고를 예방하고 올바른 사용방법을 홍보하고자 업계와 합동으로 타이어 안전검사 및 서비스 행사를 매년 실시하고 있으며, 특히 금년부터는 한국도로공사, 교통안전공단, 경찰청 등 유관기관과의 유기적인 협력관계를 바탕으로 타이어 사용.관리에 대한 범국민적인 안전의식 향상을 위해 타이어 안전서비스 확대 등 적극적인 공동방안을 모색, 실시하고 있습니다.본고는 우리협회가 운전자들의 타이어 안전사용.관리에 관한 실태 파악을 위해 금년 상반기(3-7월)간 실시한 타이어 안전검사와 설문조사의 결과입니다.

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Sensory Preference of Soy Sauces used for Seasoning Soups and Cooked Mungbean Sprouts (국과 숙주나물에 사용된 간장의 기호도 조사)

  • Lee, Young-Chun;Song, Ju-Ho;Lee, Seung-Yup
    • Korean Journal of Food Science and Technology
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    • v.26 no.5
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    • pp.507-511
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    • 1994
  • Traditional and commercial soy sauces used for seasoning soups and cooked mungbean sprouts were evaluated for consumer preference. Table salt was included in sensory tests, because the consumer commonly used it for seasoning soups. Triangle tests with 30 trained panelists were used to evaluate differences between two soy sauces, and 9 point hedonic scale tests with 100 consumer panelists to evaluate the consumer preference. Taste of sea mustard, Chinese radish and dried pollack soups seasoned with the traditional soy sauce, commercial soy sauce for soup and table salt was significantly different. The consumer panel indicated that the commercial soy sauce for soup was most preferred and the traditional soy sauce least preferred. Taste of cooked mungbean sprouts seasoned with two sauces, prepared with either traditional or commercial soy sauces, was significantly different from each other, but the consumer panel could not detect the difference in preference.

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GPU-based Image-space Collision Detection among Closed Objects (GPU를 이용한 이미지 공간 충돌 검사 기법)

  • Jang, Han-Young;Jeong, Taek-Sang;Han, Jung-Hyun
    • Journal of the HCI Society of Korea
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    • v.1 no.1
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    • pp.45-52
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    • 2006
  • This paper presents an image-space algorithm to real-time collision detection, which is run completely by GPU. For a single object or for multiple objects with no collision, the front and back faces appear alternately along the view direction. However, such alternation is violated when objects collide. Based on these observations, the algorithm propose the depth peeling method which renders the minimal surface of objects, not whole surface, to find colliding. The Depth peeling method utilizes the state-of-the-art functionalities of GPU such as framebuffer object, vertexbuffer object, and occlusion query. Combining these functions, multi-pass rendering and context switch can be done with low overhead. Therefore proposed approach has less rendering times and rendering overhead than previous image-space collision detection. The algorithm can handle deformable objects and complex objects, and its precision is governed by the resolution of the render-target-texture. The experimental results show the feasibility of GPU-based collision detection and its performance gain in real-time applications such as 3D games.

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