• 제목/요약/키워드: Bio sensor

검색결과 598건 처리시간 0.027초

Design and Implementation of Ubiquitous Sensor Network System for Monitoring the Bio-information and Emergency of the Elderly in Silver Town

  • Choi, Seong-Ho;Park, Hyung-Kun;Yu, Yun-Seop
    • Journal of information and communication convergence engineering
    • /
    • 제8권2호
    • /
    • pp.219-222
    • /
    • 2010
  • An ubiquitous sensor network (USN) system to monitor the bio information and the emergency of the elderly in the silver town is presented. The USN system consists of the sensor node platforms based on MCU of Atmage128L and RF Chip of CC2420 satisfying IEEE 802.15.4, which includes the bios sensor module such as the electrocardiogram (ECG) sensor and the temperature sensor. Additionally, when an emergency of the elderly is occurred in the silver town, the routing algorithm suitable to find and inform the location of the elderly is proposed, and the proposed routing algorithm is applied to the USN. To collect and manage the ECG data at the PC connected to the sink node, LabView software is used. The bio information and the emergency of the elderly can also be monitored at the client PC by TCP/IP networks in the USN system.

Heme proton resonances assignments based on nuclear Overhauser effect

  • Li, Chun-Ri;Kim, So-Sun;Lu, Ming;Park, Jang-Su
    • 한국자기공명학회논문지
    • /
    • 제11권1호
    • /
    • pp.48-55
    • /
    • 2007
  • NMR signals of two hemes were assigned to particular hemes in the crystal structures by nuclear Overhauser effect experiments. The results showed that the hemes with the highest and lowest redox potentials in the one-electron reduction process correspond to the hemes I and IV in the crystal structure.

  • PDF

X-선 영상에서의 노이즈 제거에 대한 연구 (Study of Noise Reducion in X-ray image)

  • 박종덕;전성채;허영;진승오
    • 대한전자공학회:학술대회논문집
    • /
    • 대한전자공학회 2006년도 하계종합학술대회
    • /
    • pp.391-392
    • /
    • 2006
  • In x-ray imaging system, twokinds of noises are involved. First, the charge generated from the radiation interaction with the detector during exposure is modeled by Poisson process. Second, the signal is then added by readout electronics noise, which is modeled by Gaussian distribution. In this paper, we applied Wiener filter and Wavelet to remove noise from medical X-ray image, the result shows that wavelet yield better segmentation results than the wiener filter.

  • PDF

농업 로봇 용 수평 자세 모니터링 시스템 개발 (Development of Horizontal Attitude Monitoring System for Agricultural Robots)

  • 김성득;김청월;권익현;이영태
    • 반도체디스플레이기술학회지
    • /
    • 제18권2호
    • /
    • pp.87-91
    • /
    • 2019
  • In this paper, we have development of horizontal attitude monitoring system for agricultural robots. A two-axis gyro sensor and a two-axis accelerometer sensor are used to measure the horizontal attitude angle. The roll angle and pitch angle were measured through the fusion of the gyro sensor signal and the acceleration sensor signal for the horizontal attitude monitoring of the robot. This attitude monitoring system includes GPS and Bluetooth communication module for remote monitoring. The roll angle and pitch angle can be measured by the error of less than 1 degree and the linearity and the reproducibility of the output signal are excellent.

내분비계 장애물질 검색을 위한 효소면역측정법을 이용한 황소개구리 비텔로제닌 정량법 개발 (Development of Quantitative Vitellogenin ELISAs for Bullfrog (Rana catesbeiana) used in Endocrine Disrupter Screening)

  • 이상훈;강윤주;이춘일;김안드레;김춘봉;정규혁;김동규;박남규;박광식;강신원;박장수
    • Environmental Analysis Health and Toxicology
    • /
    • 제21권2호
    • /
    • pp.147-151
    • /
    • 2006
  • 난생 생물의 알 생성유도 단백질인 비텔로제닌(viteILogenin, VTG)을 성숙한 암컷 황소개구리 (Rana catesbeiana)혈청으로부터 음이온 교환 크로마토그래피를 이용하여 정제 하였으며 정제한 비텔로제닌을 BALB/c mice에 주사하여 폴리크로날 항체를 생산하였고 이것은 protein A column으로 정제 하였다. 이렇게 정제된 폴리크로날 항체를 이용하여 황소개구리 비탈로제닌 측정용 효소면역측정법을 개발하였으며 그 측정 범위는 $12{\sim}1,560ng/mL$였다. 또한 이 효소면역측정법을 평가하기 위해 성숙한 수컷 황소개구리를 청정지역과 폐수처리장 하류 하천에서 서식하는 황소개구리 혈액 속의 비텔로제닌을 측정하였다. 그 결과 폐수처리장 하류 하천에 서식하는 수컷 황소개구리 비텔로제닌이 청정지역보다 현저하게 높게 유도됨을 알 수 있었다.

보일러용 정전용량형 수위센서 시스템 개발 (Development of Capacitive Water Level Sensor System for Boiler)

  • 이영태;권익현
    • 반도체디스플레이기술학회지
    • /
    • 제20권3호
    • /
    • pp.103-107
    • /
    • 2021
  • In this paper, a capacitive water level sensor for boilers was developed. In order to accurately monitor the water level in a high-temperature boiler that generates a lot of precipitates, the occurrence of precipitates on the surface of the water level sensor should be small, and a sensor capable of measuring even if the sensor surface is somewhat contaminated is required. The capacitive water level sensor has a structure in which one of the two electrodes is insulated with Teflon coating, and the stainless steel package of the water level sensor is brought into contact with the water tank so that the entire water tank becomes another electrode of the water level sensor. A C-V converter that converts the capacitance change of the capacitive water level sensor into a voltage change was developed and integrated with the water level sensor to minimize noise. The performance of the developed capacitive water level sensor was evaluated through measurement.

ZigBee 센서 네트워크를 이용한 생체신호 전송 및 저장 시스템의 구현 (Implementation of Bio-Signals Transmission and Storage System Using ZigBee Sensor Network)

  • 김영준;이인성
    • 대한전자공학회:학술대회논문집
    • /
    • 대한전자공학회 2007년도 하계종합학술대회 논문집
    • /
    • pp.131-132
    • /
    • 2007
  • In this paper, we designed and implemented bio-signals transmission and storage system using wireless sensor network based on ZigBee. Wireless sensor network is organized with routing protocol based on tree structure. The data is transmitted to monitoring system based on SIP. ZigBee will be used as various combinations with other wireless network technologies for application purposes.

  • PDF

슬관절 운동 평가를 위한 생체 임피던스 측정용 전도성 섬유 센서의 여기 주파수별 특성 평가 (Excitation Frequency Characteristics of a Conductive Fabric Sensor Using the Bio-impedance for Estimating Knee Joint Movements)

  • 이병우;이충근;김진권;정완진;이명호
    • 전기학회논문지
    • /
    • 제60권7호
    • /
    • pp.1427-1433
    • /
    • 2011
  • This study describes a conductive fabric sensor and determines an optimum excitation frequency of the sensor to evaluate knee joint movements. Subjects were composed of 15 males (age: $30.7{\pm}5.3$) with no known problems with their knee joints. The upper side of subjects' lower limbs was divided into two areas and the lower side of subjects' lower limbs was divided into three areas. The sensors were attached to 1 for 3 spot from a hip joint and to 3 for 4 spot from a knee joint which are the optimum conductive fabric sensor configuration to evaluate knee joint movements. As a result, the optimum excitation frequency for evaluating knee joint movements using conductive fabric sensors was 25 kHz. Average and standard deviation of bio-impedance changes from 15 subjects were $92.1{\pm}137.2{\Omega}$ at 25 kHz. The difference of bio-impedance changes between 25 kHz and 50 kHz was statistically significant (p<0.05) and the difference of bio-impedance changes between 25 kHz and 100 kHz was also statistically significant (p<0.001). These results showed that conductive fabric sensors are more sensitive to measure bio-impedance for evaluating knee joint movements as an excitation frequency decreases.