• Title/Summary/Keyword: environment sensor

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Auto Dispatch Device of Parturition Beginning Signal by Temperature and a Load Sensor at Ubiquitous Circumstance in Pig Industry (양돈산업에 있어서 유비쿼터스 환경에서 온도 및 하중 센서에 의한 자동 분만 알림 시스템 개발)

  • Lee, Jang-Hee;Baek, Soon-Hwa;Yon, Seung-Ho
    • Reproductive and Developmental Biology
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    • v.33 no.3
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    • pp.139-146
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    • 2009
  • This study tried to develop the system (device) that automatically notify a manager of condition just before and after farrowing to extend ubiquitous-based technology and to increase efficiency of delivery care and productivity by reducing human labor and time on standby when farrowing management is done in the difficult and hard working environment of farrowing such as night or holidays in field sand especially in pig industry. In this test, selected 10 gilts were executed timed artificial insemination and were set up each temperature sensor and load sensor to them 3 days before the estimated farrowing day and were observed the farrowing situation. This study was embodied the NESPOT-based (KT Corporation) monitoring system, the system to transmit data in real time by utilization of wireless LAN and the sensor module to apply the ubiquitous environment to them. And this study was observed the situation to automatically notify situations of 10 gilts that first bore just before and after farrowing. The result obtained the farrowing situations of them in real time by setup of the NESPOT-based monitoring system to check farrowing situation directly is as follow. The average time of the automatic notice about situation just before farrowing by the temperature sensor was 27.5 minutes before the beginning of farrowing (the expulsion time of a piglet). 6 of 8 pregnant gilts that first bore automatically were notified situations just before farrowing and the temperature sensors inserted into 2 ones before farrowing were omitted. (The automatic notice rate 75%) The average time of the automatic notice of situation just after farrowing by the load sensor was taken 46.5 minutes after the beginning of farrowing (the expulsion time of a first piglet). The average gestation period of 8 ones that first bore and were tested by the automatic notice of farrowing situation was 115.6 days. This result found that the automatic farrowing notice system by the temperature sensor is more efficient than the load sensor as the automatic farrowing alarm device and sanitary treatment and improvement of the omission rate were required.

Ontology Based User-centric Service Environment for Context Aware IoT Services (상황인지 IoT 서비스 제공을 위한 온톨로지 기반 사용자 친화적 서비스 환경)

  • Choi, Hoan-Suk;Lee, Jun-Young;Yang, Na-Ri;Rhee, Woo-Seop
    • The Journal of the Korea Contents Association
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    • v.14 no.7
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    • pp.29-44
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    • 2014
  • To provide context aware service, certain phenomena and situation information of the user should be detecting and monitoring using sensors. But, the sensor data has heterogeneity about system, syntax, structure, and semantics. So, it is difficult to apply to various services. To solve this issue, we should remove these heterogeneities and convert to context information that is easy to provide context aware services. Also, the existing context aware service mash-up environment require relevant sensor type, criteria of context, programing ability to define the service situation. So, it is difficult to create service for a non-technical user. Therefore, we propose ontology based user-centric service environment to provide context aware IoT services. It provide context awareness and user-desired services using data that acquired via IoT paradigm. The proposed environment consist of the ontology based semantic sensor data processing and the user-centric service environment. It provide convert the object data to the context information and service mash-up process to create user service in easy way.

An Energy Efficient Cluster-based Scheduling Scheme for Environment Information Systems (환경정보 시스템에 적합한 클러스터 기반 에너지 효율적인 스케줄링 기법)

  • An, Sung-Hyun;Kim, Seung-Hoon
    • Journal of Korea Multimedia Society
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    • v.11 no.5
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    • pp.633-640
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    • 2008
  • Sensor node clustering is one of the most popular research topics to reduce the energy of sensor nodes in wireless sensor networks. Previous researches, however, did not consider prediction effects of sensed environment information on TDMA scheduling of a cluster, resulting energy inefficiency. In this paper, we suggest an energy efficient cluster-based scheduling scheme that can be applied flexibly to many environment information systems. This scheme reflects the environment information obtained at the application layer to the MAC layer to set up the schedule of a cluster. The application layer information sets up the scheduling referring to the similarity of sensed data of cluster head. It determines the data transmission considering the result of similarity. We show that our scheme is more efficient than LEACH and LEACH-C in energy, which are popular clustering schemes, through simulation.

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Design of a Location Management System in the Ubiquitous Computing Environments (유비쿼터스 컴퓨팅 환경에서의 위치 데이타 관리 시스템의 설계)

  • Lee, Ki-Young;Kim, Dong-Oh
    • Journal of the Korea Society of Computer and Information
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    • v.12 no.6
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    • pp.115-121
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    • 2007
  • Recently, Location Based Service including tracking and way-finding services has been activated rapidly in the ubiquitous computing environment. According as the ubiquitous computing environment is developed, various types of sensor to acquire various data including location of the moving object are used widely, and acquired sensor data becomes abundant. However, the existing location management system based on a single location sensor is difficult to support LBS efficiently in the ubiquitous computing environment. In this paper, therefore, we propose the location management system in the ubiquitous computing environment that can manage the location data and the various sensor data efficiently. In addition, the location management system adopts the core technology for efficiently storing and transferring a large-volume of various data such as location data and for efficiently processing the various requests from a variety of servers and sensors. Especially, our architecture that is presented in this paper can support context-aware services and autonomous services efficiently in the ubiquitous computing environment.

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A Medium Access Control Scheme for Reducing Energy Consumption through Avoiding Receipt of Redundant Messages in Wireless Sensor Networks (무선 센서 네트워크에서 중복 메세지 순신 회피를 통한 에너지 소비절감 매체 접근 제어)

  • Han, Jung-An;Lee, Moon-Ho
    • Journal of Information Technology Applications and Management
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    • v.12 no.4
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    • pp.13-24
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    • 2005
  • The sensor network is a key component of the ubiquitous computing system which is expected to be widely utilized in logistics control, environment/disaster control, medical/health-care services, digital home and other applications. Nodes in the sensor network are small-sized and exposed to adverse environments. They are demanded to perform their missions with very limited power supply only. Also the sensor network is composed of much more nodes than the wireless ad hoc networks are. In case that some nodes consume up their power capacity, the network topology should change, and rerouting/retransmission is necessitated. Communication protocols studied for conventional wireless networks or ad hoc networks are not suited for the sensor network resultantly. Schemes should be devised to control the efficient usage of node power in the sensor network. This paper proposes a medium access protocol to enhance the efficiency of energy consumption in the sensor network node. Its performance is analyzed by simulation.

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A Study on the Application of Gas Sensor Array to Smart Phone (가스 센서 어레이의 스마트 폰 응용에 관한 연구)

  • Lee, Hyun-Beom;Lee, Min-Chul;Joo, Weon-Yong;Lee, Seong-Choon
    • Journal of The Institute of Information and Telecommunication Facilities Engineering
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    • v.9 no.4
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    • pp.147-152
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    • 2010
  • Gas sensor array can be widely applied to atmosphere environment, quality control of food, and medical fields etc. So for the commercialization and popularization of sensor technology, this paper looked into the method to provide users with general purpose smart phone and gas sensor array linked together. The reviewed system can detect unknown gas in the air and inform users using smart phone by arraying 8 kinds of common use gas sensor. This system is composed of the sensor module, communication module between sensor array and smart phone application software. In this paper, this prototype system demonstrate convincingly that the application of Gas sensor array to smart phone is a good outlook.

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Autonomous Sensor Center Position Calibration with Linear Laser-Vision Sensor

  • Jeong, Jeong-Woo;Kang, Hee-Jun
    • International Journal of Precision Engineering and Manufacturing
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    • v.4 no.1
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    • pp.43-48
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    • 2003
  • A linear laser-vision sensor called ‘Perception TriCam Contour' is mounted on an industrial robot and often used for various application of the robot such as the position correction and the inspection of a part. In this paper, a sensor center position calibration is presented for the most accurate use of the robot-Perceptron system. The obtained algorithm is suitable for on-site calibration in an industrial application environment. The calibration algorithm requires the joint sensor readings, and the Perceptron sensor measurements on a specially devised jig which is essential for this calibration process. The algorithm is implemented on the Hyundai 7602 AP robot, and Perceptron's measurement accuracy is increased up to less than 1.4mm.

Fabrication and Characteristic of AE sensor using the Lead-free NKN Ceramics (무연 NKN 세라믹스를 이용한 AE 센서 제작 및 특성)

  • Lee, Kab-Soo;Yoo, Ju-Hyun;Hong, Jae-Il
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2006.11a
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    • pp.39-40
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    • 2006
  • AE sensor using lead-free ceramics should be developed for prohibiting environment protection. In this study, Langevin type AE sensor was manufactured as air backing structure. Here, the piezoelectic element was used as PZT(EC-65) and NKN, respectively. The resonant frequency of AE sensor using PZT was 143 kHz and the resonant frequency of AE sensor using NKN was 178 kHz. The waveform of AE sensor using NKN was responded more sensitively than that of AE sensor using PZT.

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On the use of an acoustic sensor for measuring the level of a zinc pot (용융아연욕 탕면 높이 측정을 위한 초음파 센서의 사용에 관하여)

  • 박상덕;임태균;이옥산
    • 제어로봇시스템학회:학술대회논문집
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    • 1996.10b
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    • pp.836-839
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    • 1996
  • Throughout CGL (Continuous Galvanizing Line) in steel works, zinc-coated steel sheets are produced which are used where long-running corrosion resistivity is required. During the galvanizing process, top dross is created and floated on the zinc pot. Because the dross leaves ill patterns on the coated sheets, a robot system is developed to automatically collect and remove the top dross. It consists of a robot and its carriage system, a pot level sensor, a system controller, and special robot tools. For the first time the level of zinc pot must be measured and fed back to the robot controller to avoid submersion of the robot hand into the hot zinc pot. In this paper, acoustic distance sensor is tested as a candidate for the pot level sensor in the view point of hot environment. Some considerations on the use of the acoustic distance sensor will be denoted.

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Development of Intelligent Data Validation Scheme for Sensor Network (센서 네트워크를 위한 지능형 데이터 유효화 기법의 개발)

  • Youk, Yui-Su;Kim, Sung-Ho
    • Journal of Institute of Control, Robotics and Systems
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    • v.13 no.5
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    • pp.481-486
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    • 2007
  • Wireless Sensor Network(WSNs) consists of small sensor nodes with sensing, computation, and wireless communication capabilities. The large number of sensor nodes in a WSN means that there will often be some nodes which give erroneous sensor data owing to several reasons such as power shortage and transmission error. Generally, these sensor data are gathered by a sink node to monitor and diagnose the current environment. Therefore, this can make it difficult to get an effective monitoring and diagnosis. In this paper, to overcome the aforementioned problems, intelligent sensor data validation method based on PCA(Principle Component Analysis) is utilized. Furthermore, a practical implementation using embedded system is given to show the feasibility of the proposed scheme.