• Title/Summary/Keyword: 알카라인 배터리

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Table-based Effective Estimation of Residual Energy for Battery-based Wireless Sensor System (배터리기반 무선 센서시스템을 위한 테이블기반 잔여 에너지양 추정기법)

  • Kim, Jae-Ung;Noh, Dong-Kun
    • Journal of the Korea Society of Computer and Information
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    • v.19 no.9
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    • pp.55-63
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    • 2014
  • Up to date, numerous studies on wireless sensor networks have been performed to overcome the Energy-Constraint of the sensor system. Existing schemes for estimating the residual energy have considered only voltage of sensor system. However battery performance in the real is affected by temperature and load. In this paper we introduce more accurate scheme, for the use in wireless sensor node, based on the interpolation of lookup tables which allow for temperature and load characteristics, as well as battery voltage.

Design and Implementation of a 9V Mini-Electrocardiograph(ECG) system (9V 초소형 심전도계의 설계 및 구현)

  • Song, Myeong-Kil;Park, Kwang-Min
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.9 no.5
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    • pp.1130-1133
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    • 2008
  • In this paper, a mini-Electrocardiograph(ECG) system operated by a general 9V alkaline battery is designed and implemented. The manufactured ECG consists of the instrumentation amplifier stage for detecting and amplifying the heart signal, the high pass filter(HPF), the low pass filter(LPF), the differentiator cirduit, and the peak detector. The detected heart signal through three leads is displayed cleanly on the oscilloscope, which shows the good operation of our ECG. As the detected heart signal is digitalized and displayed on the small LCD unit, the convenience of easy checkup and portability of the implemented ECG can be largely improved. Therefore, whenever and wherever anyone may checkup his/her cardiac state with ease.