• KSII Transactions on Internet and Information Systems (TIIS)
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• 제8권12호
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• pp.4451-4466
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• 2014

We present joint radio selection and relay scheme that delivers data from a source to a sink in heterogeneous stationary sensor networks consisting of various radio interfaces. The proposed scheme finds the optimal relay nodes and their corresponding radio interfaces that minimize energy consumption throughout the network while satisfying the end-to-end packet deadline requirement. We formulate the problem of routing through radio interface selection into binary integer programs, and obtain the optimal solution by solving with an optimization solver. We examine a trade-off relationship between energy consumption and packet delay based on network level simulations. We show that given the end-to-end deadline requirement, our routing algorithm finds the most energy-efficient routing path and radio interface across mesh hops. We demonstrate that the proposed routing scheme exploits the given packet delivery time to turn into network benefit of reducing energy consumption compared to routing based on single radio interface.

• 디지털융복합연구
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• 제4권1호
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• pp.31-41
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• 2006

This article introduces developing trends of an 'Ubiquitous Interface' as an access method for use of various network resources, such as public wireless networks and un-licensed wireless networks in ubiquitous sensor network environments, without troublesome settings or operations by users. 'Ubiquitous Interface' is a relatively wide sense meaning not only physical interface of specified device or between processors, but anything method for access USN. These 'Ubiquitous Interface' able to provide seamless services that adapt autonomously to the user's movements and changes in the state of wireless resources. Recently, strongly recommended current technologies are RFID, NFC, Multi-mode mobile terminal, UMA mobile terminal and Wearable computer as a future ubiquitous interface. These technologies are have to have flexibility and multiple physical communication channels for seamless service hand over and serve easy connection at huge USN to user. Also, they have to must have flexible software structure. Finally, through the 'Ubiquitous Interface', we will be experience of seamless communication and realize a real liberty of communication.

• 한국멀티미디어학회논문지
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• 제13권8호
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• pp.1235-1244
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• 2010

최근 아이폰을 필두로 급부상하는 스마트폰의 정전기식 입력 장치에서는 펜 입력장치나 감압식 입력 장치를 위해 만들어진 제스처기반 인터페이스가 적합하지 않다. 손가락 튕김 인터페이스는 기존의 제스처기반 인터페이스에서 사용했던 플릭 제스처와 달리 명령을 적용시킬 대상과 명령을 동시에 선택함으로 작업 단계를 절반으로 감소시킬 수 있다. 뿐만 아니라, 멀티터치 인터페이스와 병합하여 사용함으로 다양한 메뉴 지원이 가능하여 복잡한 제스처를 학습할 필요가 없고, 정전기식 입력 장치 장치에 사용하기 적합하여 입력 오류를 최소화 시킨다. 본 연구에서는 정전기식 입력 장치를 가지는 스마트 폰 장치에서의 파일 관리를 빠르게 해주는 다중 손가락 튕김 인터페이스를 설계하고 구현한다. 실험에서는 사용자 평가를 통해 제안하는 인터페이스가 정전기식 입력 장치에서 기존 방식보다 유용함을 증명한다.

• 센서학회지
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• 제16권2호
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• pp.150-158
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• 2007

The IEEE 1451 publication are available, this standard defines interface between sensor and processor, and plug and play in processor is possible. Also, Intelligence of sensor was possible because sensor includes transducer electronic data sheet (TEDS). In IEEE 1451 standards, IEEE 1451.4 is suitable standard in single sensor, and IEEE 1451.2 is suitable standard in multi-sensors (array sensor). In this paper, apply IEEE 1451 to electronic tongue system. In the case of electronic tongue system, because array sensor is used, it is that complex and difficult to apply IEEE 1451.4 that is standard for single sensor. In this paper, apply IEEE 1451.2 for array sensor to design of electronic tongue system. Communication interface method of IEEE 1451.2 for electronic tongue system is presented, and implemented TEDS of electronic tongue system.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1996년도 한국자동제어학술회의논문집(국내학술편); 포항공과대학교, 포항; 24-26 Oct. 1996
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• pp.694-697
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• 1996

The aim of this work for 5 years from 1994 is to develop a multi-fingered robot hand and its control system for grasp and manipulation of objects dexterously. Since the robot hand is still being developed, a commercialized robot hand from Barrett Company is utilized to implement a hand controller and control algorithm. For this, VME based motion control and interface boards are developed and multi-sensors such as encoder, force/torque sensor, dynamic sensor and artificial skin sensor are partly developed and employed for the grasping control algorithm. In oder to handle uncertainties such as mechanical idleness and backlash, a fuzzy rule based grasping algorithm is also considered and tested with the developed control system.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2000년도 하계학술대회 논문집
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• pp.532-535
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• 2000

We have fabricated a sensor system for on-line monitoring the oxygen permeability and diffusivity of six different polymer films using the miniaturized 6 cathode(Ag)-single anode(Ag/AgCl) type hexagonal oxygen electrode. This system consists of multiple input front-end electronics, signal conditioning circuit using the embedded microcontroller 80C196KC, PC interface circuit and PC with the OS for microcontroller and the operating program for this system. The digital low-[ass filter was programmed and the simulated filter characteristics were enough to eliminate the noise from sensor signal. According to the experimental results, the linearity coefficients of the output voltage to oxygen partial pressure for each sensor electrode of six cathode type oxygen sensor are 0.998, 0.997, 0.998, 0.997, 0.997, 0.997 respectively, and the response times are all within 4 minutes.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2012년도 춘계학술대회
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• pp.813-814
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• 2012

최근 저탄소 녹생성장을 위한 개발과 더불어 친화적 감성조명을 연출할 수 있는 LED 제어 IT 융합기술이 주목을 받고 있다. LED 조명 빛의 특성을 응용하여 멀티센서 및 스위칭기술, LED 광학, 인터넷 기반 원격 조명제어 등 연동 제어기술로서, 제안된 시스템은 태양광을 이용한 지능형 LED 제어 기술연구로서, 에너지의 충전 방식 개선, 배터리 SoC에 따른 제어, 겨울철 효율 개선 및 구간에 따라 LED 방전 전류를 제어하기 위해 멀티스위칭 센서를 사용하자 함이다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1996년도 추계학술대회 논문집
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• pp.86-88
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• 1996

A method is presented for the development of the PC-based measurement system on the 6 cathodes-single anode type multi-functional oxygen electrodes for detecting various components of the solution by measuring the dissolved oxygen(DO) concentration. The system is consisted with the 6 channel sensor signal modyfing circuits for the sensor and the PC interface circuits using the single chip microprocessor 80c196kc. Typical polarograms for the DO probes under test using this sensor circuits are presented. This system covers wide range of measuring time from 300sec to over 16 hour in one measurement step by programming the 9 monitor disply mode.

• 한국정보통신학회논문지
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• 제21권10호
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• pp.1957-1963
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• 2017

본 논문은 지하수 수질을 모니터링하기 위한 다중센서기반의 센서 디바이스를 제작 및 성능을 제시하고자 한다. 신규로 제작된 시스템은 데이터 수집을 위하여 원격 제어기반의 다중센서 디바이스를 채택하였으며 원격모니터링 관리를 위하여 윈도우 모바일을 사용하였습니다. 지하 수질 센서장치와 모니터링 시스템 간의 통신 인터페이스로 직렬 포트 CAN 및 RS485를 채택하였고 신규 제작된 직렬 연결형 다중 센서 장치를 사용하여 지하수의 깊이에 따른 기존 센서와의 성능 비교 분석(온도계 오차범위 ${\pm}0.2^{\circ}C$, 수소이온농도(pH) < 0.85unit ) 결과를 제시하였다. 무선 연결된 센서 네트워크를 기반으로 한 지하수 모니터링 시스템을 위한 설계 및 통신방법을 제시하여 장치의 성능을 비교 분석하였다.

• Structural Monitoring and Maintenance
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• 제9권2호
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• pp.129-155
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• 2022

In this study, parametric analyses on a hoop-type PZT (lead-zirconate-titanate) interface are performed to estimate the effects of the PZT interface's materials and geometries on sensitivities of impedance responses under strand breakage. The paper provides a guideline for installing the PZT interface suitable in tendon anchorages for damage-sensitive impedance signatures. Firstly, the concept of the PZT interface-based impedance monitoring technique in prestressed tendon anchorage is briefly described. A FE (finite element) analysis is conducted on a multi-strands anchorage equipped with a hoop-type PZT interface for analyzing materials and geometric effects. Various material properties, geometric sizes of the interface, and PZT sensor are simulated under two states of prestressing force for acquiring impedance responses. Changes in impedance signals are statistically quantified to analyze the effect of these factors on damage-sensitive impedance monitoring in the tendon anchorage. Finally, experimental analyses are performed to demonstrate the effects of materials and geometrical properties of the PZT interface on damage-sensitive impedance monitoring.