• 제목/요약/키워드: Load Detection

검색결과 580건 처리시간 0.028초

지각부담효과에 미치는 정서의 영향: ERP 연구 (The Affective Influences on Perceptual Load Effect: An Event-related Potential Study)

  • 박태진;김정희
    • 인지과학
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    • 제23권2호
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    • pp.165-184
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    • 2012
  • 주의를 기울이지 않은 배경자극의 정서가가 표적자극의 지각처리에 미치는 영향을 알아보기 위해 정서적 그림자극(IAPS) 위에 6개 글자들을 함께 제시하고서 실험참가자들에게 특정 글자를 탐지하도록 요구하였다. 글자탐지의 난이도를 달리하여 지각부담을 조작하였는데, 정확율과 반응시간 모두에서 저부담조건이 고부담조건보다 빠르고 정확하였다. ERP 분석 결과, 정서자극 없이 글자탐지만 수행한 통제조건의 경우 후측 시각영역에서 P1과 N1 성분에서 지각부담효과가 관찰되었다. 실험조건에서는 정서가와 지각부담의 상호작용이 후측 시각영역의 N1에서 관찰되었는데, 특히 중립정서보다 부정정서에서 고부담조건과 저부담조건간 진폭 차이가 더 크게 나타났다. 배경자극이 부정적인 경우 중립적인 경우보다 주의용량을 더 소모함으로써 지각부담효과가 더 컸던 것으로 판단되는데, 이는 주의집중 받지 않은 정서자극이 자동적으로 처리되어 표적자극의 초기 지각처리에 영향을 미친다는 것을 시사한다.

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브러시리스 직류 전동기의 센서리스 구동시 부하 변동에 따른 회전자 위치 오차 분석과 아날로그 필터의 설계 (Analysis on the Analog Filter Design and the Effect of Load for BLDCM Sensorless Drive)

  • 김영일;김종선;장재훈;유지윤;김동식
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2004년도 전력전자학술대회 논문집(2)
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    • pp.660-664
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    • 2004
  • The indirect rotor position detection method using terminal voltage of brushless DC motor (BLDCM) requires simple control circuit, and has wide speed range of sensorless operation. However, because the substantial phase difference exists between real back emf and terminal voltage, the existing indirect detection method using analog filter which is affected by frequency, speed, and load sensitively cannot be synchronized with current, in the end, it advances or delays. This paper presents new analog filter circuit design for rotor position estimation in order to solve the problem, and proposes novel sensorless operation method which is stable even in high speed range and not influenced by parameters with analysis on phase difference by load and speed. Moreover, the appropriateness of the proposed sensorless drive in this paper is verified and analyzed by experimentation.

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고무하우징을 갖는 장력센서의 변형거동 해석 (Stress Analysis of a Tension Sensor with a Rubber Housing for a Fence Intrusion Detection System)

  • 이형욱;장광걸;허훈;강대임
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2001년도 춘계학술대회논문집A
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    • pp.698-703
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    • 2001
  • This paper is concerned with the nonlinear hyperelastic problem fur the incompressible characteristics of the rubber. Tension sensor is a strain gage type load cell element for a fence intrusion detection system and consists of the sensing part and the rubber housing. The analysis includes an elastic analysis and a hyperelastic analysis of a tension sensor for the deformed shape and variation of the maximum strain on the sensing part with respect to the vertical load. Numerical results show that the hyperelastic model is stiffer and less deformed than the elastic model. Comparing with the experimental test data, we know the hyperelastic model is the better approximation than the elastic model.

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무접점 전원공급 시 1차측 전류를 이용한 금속 물질 검출에 관한 연구 (The Metal Detection using Primary Current in Contact-less Power Supply)

  • 김유석;유주희;김춘삼;성원기
    • 전력전자학회논문지
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    • 제17권5호
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    • pp.445-452
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    • 2012
  • The impurity detection method applied to existing discriminated the normality(R, L, C) and impurity(Metal) load using mutual RFID/ID method in the contactless power supply in which the primary side and the secondary side are completely separation by using the contactless transformer. However, this kind of system is caused the high cost of the system and complexity of control. Therefore, in this paper was proposed the contact-less power transfer using the primary current that determine normality or impurity load by compare the primary current Amplitude to reference quantity value and design the 3[W] contact-less power transfer and conduct an experiment for demonstrate the validity.

누설전류 검출 및 차단을 위한 제어알고리즘 설계 (Controller design for Leakage current detection and disconnection)

  • 반기종;윤광호;박진수;남문현;김낙교
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2003년도 학술회의 논문집 정보 및 제어부문 B
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    • pp.417-420
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    • 2003
  • In this paper, we have designed the ground faults detection and disconnection algorithm at normal rendition of AC 120V to 240V rating voltage. Ground faults in electrical network have the characteristics of low current, 60Hz frequency to 2kHz frequency. The load rendition are no load and 20A load. The controller have the trip level are 6mA with ground faults. Conventional controller does not have the miswiring condition. The Controller algorithm using pic16c71 microprotessor.

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전기저항 측정에 의한 FRP의 파괴 예측 기능의 평가 (Evaluation of Fracture Detection Function for the FRP by Electrical Resistance Measurement)

  • 신순기;김영희;이준희
    • 한국재료학회지
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    • 제12권2호
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    • pp.135-139
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    • 2002
  • Carbon powders (CP) and carbon fiber (CF) were introduced info glass fiber reinforced plastics (FRP) composites to obtain fracture detection function. The composites were evaluated through the relation between a load-displacement curve and an electrical resistance change curve in three point bending test. CP containing FRP (CP-FRP) has a sensitivity of electrical resistance change at much lower load level than CF containing FRP (CF-FRP). In loading-unloading tests, CP-FRP showed a large amount of residual electrical resistance which enables the estimation of loading hysteresis.

An Effective Maneuver Detection Strategy with Computational Load Saving

  • Ahn, Byeong-Wan;Park, Jae-Weon;Song, Taek-Lyul
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2002년도 ICCAS
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    • pp.63.5-63
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    • 2002
  • In this paper, we are concerned with a maneuver detection algorithm which uses the 'lost' measurements down-sampled for computation load saving when a target is in quiescent motion. In general applications of estimation, measurements are available at a relatively high rate, while the estimation processing equipment can only operate at a lower sampling rate. Furthermore, when a target is in nearly quiescent motion, the update of the tracking filter need not to be implemented with maxim urn process power of the filter since the states of the target vary relatively slowly. This does not give serious degradation on the estimation performance. We consider the maneuver detection problem at the case...

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블루투스를 이용한 실내 영역 결정 방법 (Indoor Zone Detection based on Bluetooth Low Energy)

  • 조르주 프리산초;이제민;김형신
    • 한국컴퓨터정보학회:학술대회논문집
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    • 한국컴퓨터정보학회 2015년도 제52차 하계학술대회논문집 23권2호
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    • pp.279-281
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    • 2015
  • Location awareness is an important capability for mobile-based indoor services. Those indoor services have motivated the implementation of methods that need high computational load cost and complex mechanisms for positioning prediction. These mechanisms, such as opportunistic sensing and machine learning, require more energy consumption to achieve accuracy. In this paper, we propose the Bluetooth Low Energy indoor zone detection (BLEIZOD) technique. This method exploits the concept of proximity zone to reduce the load cost and complexity. Our proposed method implements the received signal strength indicator (RSSI) function more effectively to gain accuracy and reduce energy consumption.

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고역통과 필터 및 FFT를 이용하여 아크감지 알고리즘 검증 (Verification of Algorithm for Arc Detection Using High Pass Filter and FFT)

  • 윤민호;조유정;김경탁;임성훈
    • 한국전기전자재료학회논문지
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    • 제36권5호
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    • pp.520-524
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    • 2023
  • An algorithm was developed to detect and block serial arc currents using HPF. The AC series arc problem is that the load current is greater than the fault current and no leakage current occurs. As a solution, an arc detection method utilizing differences in high- frequency amplitudes was developed. HPT was applied to the load current and FFT was applied to eliminate low frequencies. An algorithm has been developed to detect arc waveforms when they exceed a certain value compared to the average of normal waveforms. Using one cycle of data, arc detection is faster and arc accidents are prevented.

프로토콜 기반 분산 침입탐지시스템 설계 및 구현 (Implementation of Distributed Intrusion Detection System based on Protocols)

  • 양환석
    • 디지털산업정보학회논문지
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    • 제8권1호
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    • pp.81-87
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    • 2012
  • Intrusion Detection System that protects system safely is necessary as network technology is developed rapidly and application division is wide. Intrusion Detection System among others can construct system without participation of other severs. But it has weakness that big load in system happens and it has low efficient because every traffics are inspected in case that mass traffic happen. In this study, Distributed Intrusion Detection System based on protocol is proposed to reduce traffic of intrusion detection system and provide stabilized intrusion detection technique even though mass traffic happen. It also copes to attack actively by providing automatic update of using rules to detect intrusion in sub Intrusion Detection System.