• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 2002년도 하계종합학술대회 논문집(5)
• /
• pp.223-226
• /
• 2002

Data Acquisition System of Cargo System using a large output X-ray in harbors is usually composed of Detector, Analog Board, Digital Board, Master Board, Backplane Board and Image Construction System. In this paper we have made an image of material in container-box with Data Acquisition System and studied mainly a configuration method and principle to each part of Data acquisition system.

• 한국정보통신학회:학술대회논문집
• /
• 한국정보통신학회 2021년도 춘계학술대회
• /
• pp.605-606
• /
• 2021

본 논문에서는 아두이노 우노 보드와 1.8 인치 TFT LCD를 사용하여 1 채널 오실로스코프를 구현하였다. 오실로스코프는 데이터 수신 장치로 아두이노 우노 보드내 내장된 아날로그-디지털 변환기를 사용하여 설계되었으며, 최대 1 KHz 신호까지 처리할 수 있다.

• 한국의학물리학회:학술대회논문집
• /
• 한국의학물리학회 2002년도 Proceedings
• /
• pp.468-470
• /
• 2002

We have designed X-ray detection system and multi-channel data acquisition system for Spiral CT application. X-ray detection system consists of scintillator and photodiode. Scintillator converts X-ray into visible light. Photodiode converts visible light into electrical signal. The multi-channel data acquisition system consists of analog, digital, master and backplane board. Analog board detects electrical signal and amplifies signal by 140dB. Digital board consists of MUX(Multiplex) which routes multi-channel analog signal to preamplifier, and ADC(Analog to Digital Converter) which converts analog signal into digital signal. Master board supplies the synchronized clock and transmits the digital data to image reconstructor. Backplane provides electrical power, analog output and clock signal. The system converts the projected X-ray signal over the detector array with large gain, samples the data in each channel sequentially, and the sampled data are transmitted to host computer in a given time frame. To meet the timing limitation, this system is very flexible since it is implemented by FPGA(Field Programmable Gate Array). This system must have a high-speed operation with low noise and high SNR(signal to noise ratio), wide dynamic range to get a high resolution image.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2008년도 제39회 하계학술대회
• /
• pp.1697-1698
• /
• 2008

PLS(Pohang Light Source) is 2.5 Gev synchrotron radiation source in Pohang, Korea, which is under operation since 1995. The hardware and software of the old BPM(Beam Position Monitor) data acquisition system for the PLS storage ring was completely upgraded to increase its performance and stability. The new BPM data acquisition system is based on VME-based EPICS (Experimental Physics and Instrument Control System) IOC system. We used 16-bit resolution analog-to-digital conversion board to digitize analog BPM signals. We developed a data average software to average raw BPM data using reflective memory board. We also developed device drivers for VME I/O boards used, IOC database for PV's(Process Variables). The new BPM data acquisition system is currently running for routine operation with good performance and stability. In this paper, we present the hardware and software of the new BPM data acquisition system DTL water skid cooling system and Resonant Control Cooling.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2003년도 학술회의 논문집 정보 및 제어부문 B
• /
• pp.515-518
• /
• 2003

The electrical current generated by heart creates not only electric potential but also a magnetic field. In this paper, we have designed the multiplexing data acquisition system for multichannel bio-magnetic signal measurement. The system consists of VXI rack which is organized MUX and AD board, Industrial rack which is mounted single board computer and DSP board. This system enable to realtime monitoring of multichannel data simultaneously. The number of channel could be increased simply added each module and firmware could be upgraded easily using host port interface of DSP.

• 한국마린엔지니어링학회:학술대회논문집
• /
• 한국마린엔지니어링학회 2005년도 후기학술대회논문집
• /
• pp.144-145
• /
• 2005

In this study, we have developed the high resolution multichannel seismic data acquisition system and shallow marine seismic source. It is easy to operate our source system which utilizes piezoelectric transducer of high electrical power. According to water depth, survey condition and purpose, transducer number of source system can be easily changed in order to maximize field applicability. In the recording part, we used 24 bits and 8 channel high speed A/D board in order to achieve the improvement of data quality and the efficiency of data acquisition. The developed system was tested and varied with the data acquisition parameters such as source-receiver offset, and transducer number versus water depth for the field application.

• 대한기계학회논문집
• /
• 제5권4호
• /
• pp.274-283
• /
• 1981

An inexpensive and very simple microcomputer-aided measurement system has been designed for on-line experiments, which perform simultaneously data acquisition, data recorditing, calculations with the data, and positioning of necessary sensors. Interfacting between the microcomputer and the data acquisition board which consists of A/D converter, analog multiplexer, and sample-and-holder, etc. has been done through IEEE-488 interface port and parallel user port both provided by the PET computer's main logic board. Data and control signals are transfered between devices without handshaking. By utilizing BASIC commands PEEK, POKE, SYS, USR which are offered by PET microcomputer, it is possible to link machine code subroutines into the main BASIC program. This facilitates ease of data transfer, programming, and speedy execution of the program. In addition, an X-Y scanning table has been concected to the system in order to automatically position measuring sensors along a pre-determined path of interest.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1993년도 하계학술대회 논문집 A
• /
• pp.453-455
• /
• 1993

In this research, the digital signal processing PC board which employs TI's TMS320C25 is implemented. The board can perform following functions. spectrum analysis of speech and repetitive signal, digital filters emulation by convolution, signal generation of sinusoidal wave, rectangular wave etc.. In this system, communications between PC and DSP board. program down-loading to DSP board and recording and graphic of acquired and processed data in DSP board are executed by PC. Parallel interface and buffer memory are used in communications. Data acquisition and operation are carried out in DSP board. Resultant data are transmitted to PC and output through DAC.

• 한국항공우주학회지
• /
• 제32권7호
• /
• pp.83-90
• /
• 2004

본 논문은 중, 대형 비행체에 분산 탑재되어 있는 많은 센서를 효과적으로 실시간 데이터를 수집할 수 있는 시스템의 구성도를 소개하고 각종 서브 장치의 회로, 장치들간의 통신 프로토콜에 대한 설계 내용 그리고 최종적으로 실험을 통해 성능 검증한 내용을 언급한다. 각 장치들은 FPGA 소자를 기본으로 하여 모든 제어 로직, 시퀀스 로직 등의 디지털 회로를 설계 및 시뮬레이션을 수행하였으며 그 결과를 바탕으로 실제 하드웨어를 제작하여 원거리 아날로그 및 디지털 데이터의 획득, 수집 및 포맷의 일련의 과정들이 정상 적으로 이루어지는지를 확인하였다.

• 한국정보전자통신기술학회논문지
• /
• 제16권3호
• /
• pp.130-137
• /
• 2023

최근 농촌문제를 해결하기 위해 주목받고 있는 스마트팜은 작물의 생육환경을 최적화하고 효율적인 관리를 통해 작물의 생산성과 품질을 높이는 기술을 의미한다. 이러한 스마트팜에 생육환경 데이터 간 관계를 분석한다면 추가적인 생산성 향상과 작물 관리가 가능할 것이다. 본 논문에서는 온도, 습도, CO2, 토양온도, 토양습도, 일사, 토양EC, EC, pH 9개의 생육환경 데이터를 획득하고, 이를 분석하는 방법을 제안한다. 데이터 획득은 Main board와 Sensor board 간 RS-485 통신을 통해 획득 후 데이터베이스에 저장하였다. 저장된 데이터는 엑셀 시트 형식으로 내려받아 히스토그램, 데이터 차트, 상관관계 히트맵 분석을 진행하였다. 먼저 히스토그램 분석을 통해 전체, 주간, 야간 데이터의 분포를 파악하였고, 주간과 야간을 구분하여 데이터 차트 분석을 통해 월별로 평균, 중앙값, 최소값, 최대값을 파악하여 월별 데이터 변화 추이를 확인했다. 마지막으로 주간과 야간을 구분하여 상관관계 히트맵 분석을 통해 데이터의 상관관계를 파악하였다. 결과 주간에서는 온도와 토양온도, 토양EC와 EC 간에 매우 강한 양의 상관관계를 보였으며, 야간에는 온도와 토양온도, 토양EC와 EC 간에 매우 강한 양의 상관관계, 온도와 토양EC 간에 강한 음의 관계를 확인할 수 있었다.