• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.33 no.11B
• /
• pp.1005-1012
• /
• 2008

According to an aging population has dramatically increased in over the world, silver care becomes more important than other field. In this paper, we design and implement an old age patient care system that allows a carer to instantly monitor the status of proteges and notifies emergency of a patient to a medical institute. The system uses RFIDs and infrared sensors implemented in embedded software to analyze the activity and movement detection of the elderly. And the home gateway allows easy integration with heterogeneous devices by employing OSGi that is a middleware standard for home gateways. We can verify the information on the activity per day and the activity per week by Web browsers and view realtime video on the elderly by Web Cam using the implemented system. The system also can send us cell phone messages and E-mail in case of emergency.

• Proceedings of the Korean Information Science Society Conference
• /
• 2005.11a
• /
• pp.193-195
• /
• 2005

최근 유비쿼터스 컴퓨팅의 핵심 기술인 센서 네트워크 기술이 활발하게 연구되고 있는 실정이다. 이에 다양한 센서 노드 기술이 개발되면서 각기 다른 종류의 센서 노드로 구성된 이기종의 센서 네트워크의 연동에 관한 연구가 활발히 진행되고 있다. 기존에 제안된 이기종 센서 네트워크의 통합, 관리를 위한 기술은 구현이 복잡하고, 각각의 노드에 않은 연산 부하가 발생하여, 기존의 시스템을 사용하지 못해 비효율적이다. 본 연구에서 제안하는 임베디드 시스템은 Base Station 역할로 동작하여 전체 센서 네트워크의 상위에 정의되어지는 네트워크를 구성하며, 각기 다른 센서 네트워크의 데이터를 연동함으로서 노드의 연산부하를 줄이고, 기존에 구현된 센서 네트워크와 시스템을 사용함으로서 구현의 복잡성을 줄이며 효율성은 높이는 것이 가능하다. 본 연구에서는 이기종 센서 네트워크의 통합과 관리를 위해 위와 같은 이점을 갖는 임베디드 시스템을 설계하고 구현하고자 한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2011.05a
• /
• pp.245-247
• /
• 2011

For the mobile meteorological services, sensed data should be gathered at a server from various clients like as USN, mobile phone or public traffic vehicle by wireless network. The gathered data have huge volume and increase continuously, a special query method and data structure are considered. This paper studies on all query type and processing steps for the mobile meteorological services and proposes effective system structure.

• Journal of the Korean Institute of Telematics and Electronics C
• /
• v.34C no.8
• /
• pp.8-21
• /
• 1997

In this paper, we consider resistive shorts on gate-source, gate-drain, and drain-source as well as opens in MOS FETs included in typical memory cell of VLSI SRAM and analyze behavior of memory by using PSPICE simulation. Using conventional fault models and this behavioral analysis, we propose linear testing algorithm of complexity O(N) which can be applied to both functional testing and IDDQ (quiescent power supply current) testing simultaneously to improve functionality and reliability of memory. Finally, we implement BIST (built-in self tsst) circuit and BICS(built-in current sensor), which are embedded on memory chip, to carry out functional testing efficiently and to detect various defects at high-speed respectively.

• Proceedings of the KIEE Conference
• /
• 2002.11c
• /
• pp.357-360
• /
• 2002

본 논문에서는 제어기의 운영체제와 검증 프로그램에 대하여 논한다. 전체 시스템은 loop detector, loop sensor, controller 그리고 프로그램의 debugging을 위한 PC로 구성된다. 일반적으로, Embedded System에 sequential 프로그램을 사용해왔다. 하지만, 시스템의 하드웨어가 복잡해짐에 따라 운영체제를 사용하게 되었다. 이에 본 논문에서는 운영체제를 포팅하여 사용하였다. 마지막으로, 검증 프로그램은 시스템의 하드웨어 상태 및 소프트웨어의 검증을 위한 소프트웨어를 구성하였다.

• 연구논문집
• /
• s.30
• /
• pp.129-135
• /
• 2000

Double boss type composite pressure bottles have been developed widely but single boss type had not because there are some difficulty in technical point. In this paper a research was performed to develop composite pressure vessel in conjunction with design, fabrication, and test. Fiber pattern and angles were decided by CADFIL software and they are [liner/$15^{\circ}$/$15^{\circ}$/$90^{\circ}$/$18^{\circ}$/$90^{\circ}$/$21^{\circ}$/$21^{\circ}$/$90^{\circ}$]. Fabrication of bottles was done by AEA's 5-axis filament winding machine. During fabrication fiber optic sensor were embedded to measure were behavior of structure at the applied internal pressure. Even though satisfied test results were not obtained, the experimental set-up of fiber optics showed the possibility for the application of filament wound vessels. However, the conventional strain and fabrication of single boss composite bottles.

• Proceedings of the IEEK Conference
• /
• 2002.06d
• /
• pp.21-24
• /
• 2002

This paper presents a new method for the motion detection of vehicles using hierarchical motion estimation and parallel processing. It captures the road image by using a CMOS sensor. It divides the captured image into small blocks and detects the motion of each block by using a block-matching method which is based on a hierarchical motion estimation and parallel processing for the real-time processing. The parallelism is achieved by using the pipeline and the data flow technique. The proposed method has been implemented with an embedded system. Experimental results show that the proposed method detects the motion of vehicles in real-time.

• Journal of information and communication convergence engineering
• /
• v.9 no.1
• /
• pp.64-68
• /
• 2011

On the limited urban area, precise measurement of meteorological data is not easy for the cost problem. The facilities collecting the data require high installment costs. The mobile sources can be a solution in city region. For example, a public bus on which some meteorological sensors are installed can act as moving information gathering station. The information is gathered on a server and aggregated to generate useful information for smart phone application. To implement the services, several obstacles are exists. This paper studies on a design of this mobile meteorological information service system for urban area.

• Journal of Convergence Society for SMB
• /
• v.3 no.1
• /
• pp.23-30
• /
• 2013

In this paper, fuzzy entropy and similarity measure to measure the uncertainty and similarity of data as real value were introduced. Design of fuzzy entropy and similarity measure were illustrated and proved. Obtained measures were applied to the calculating process and discussed. Extension of data quantification results such as decision making and fuzzy game theory were also discussed.

• Journal of IKEEE
• /
• v.21 no.3
• /
• pp.256-259
• /
• 2017

SENT (single edge nibble transmission) is a serial communication protocol between automotive sensors and ECU (electronic control unit). SENT exploits digital waveform, so it has a simple and cheap architecture without transceiver circuits. Usually it is exploited as an embedded communication interface in the sensors. In this paper, a SENT interface was designed in Verilog HDL, fully complying with SAE J2716. It was implemented in FPGA, and verified on a test board. When it was synthesized, the gate count is about 2,500 gates in 0.18um technology.