• Title, Summary, Keyword: Bluetooth

Search Result 1,393, Processing Time 0.032 seconds

Mobile Robot Control using Smart Phone for internet of Things (사물인터넷 구축을 위한 스마트폰을 이용한 이동로봇의 제어)

  • Yu, Je-Hun;Ahn, Seong-In;Lee, Sung-Won;Sim, Kwee-Bo
    • Journal of the Korean Institute of Intelligent Systems
    • /
    • v.26 no.5
    • /
    • pp.396-401
    • /
    • 2016
  • Owing to developments in the internet of things, many products have developed and various researches have processed. Smart home systems in Internet of things area are receiving attention from many people than the other areas. Autonomous mobile robots perform various parts in many industries. In this paper, a smart housekeeping robot was implemented using internet of things and an autonomous mobile robot. In order to make a smart housekeeping robot, Raspberry Pi, wireless USB camera, and uBrain robot of Huins Corp. is used. To control the robot, cell-phone connected with IP of Raspberry Pi, and then Raspberry Pi connected with uBrain robot using Bluetooth. a smart housekeeping robot was controlled using commands of a cell-phone application. If some user wants to move a robot automatically, we implemented that a robot can be chosen an autonomous driving mode from the user. In addition, we checked a realtime video using a cell-phone and computer. This smart housekeeping robot can help user check their own homes in real time.

A Study on Indoor Position-Tracking System Using RSSI Characteristics of Beacon (비콘의 RSSI 특성을 이용한 실내 위치 추적 시스템에 관한 연구)

  • Kim, Ji-seong;Kim, Yong-kab;Hoang, Geun-chang
    • The Journal of the Institute of Internet, Broadcasting and Communication
    • /
    • v.17 no.5
    • /
    • pp.85-90
    • /
    • 2017
  • Indoor location-based services have been developed based on the Internet of Things technologies which measure and analyze users who are moving in their daily lives. These various indoor positioning technologies require separate hardware and have several disadvantages, such as a communication protocol which becomes complicated. Based on the fact that a reduction in signal strength occurs according to the distance due to the physical characteristics of the transmitted signal, RSSI technology that uses the received signal strength of the wireless signal used in this paper measures the strength of the transmitted signal and the intensity of the attenuated received signal and then calculates the distance between a transmitter and a receiver, which requires no separate costs and makes to implement simple measurements. It was applied calculating the value for the average RSSI and the RSSI filtering feedback. Filtering is used to reduce the error of the RSSI values that are measured at long distance.It was confirmed that the RSSI values through the average filtering and the RSSI values measured by setting the coefficient value of the feedback filtering to 0.5 were ranged from -61 dBm to - 52.5 dBm, which shows irregular and high values decrease slightly as much as about -2 dBm to -6 dBm as compared to general measurements.

A Survey on the Multi-device Media Usage of Millennials (밀레니얼 세대의 멀티 디바이스 미디어 이용에 대한 조사 및 분석)

  • Lee, Mingyu;Kwahk, Jiyoung;Han, Sung H.;Jeong, Dawoon;Park, Kyudong;Kim, Ju Hwan;Oh, Seokmin;Chae, Gunho
    • Journal of the Ergonomics Society of Korea
    • /
    • v.36 no.6
    • /
    • pp.645-663
    • /
    • 2017
  • Objective: The aim of this study is to understand the multi-device media usage behaviors of the 'Millennial' generation, focusing particularly on music, photo, and videos. Background: Millennials are generally defined as those who were born between early 1980's and early 2000's, and they are known to be familiar with various digital devices since childhood. Since they constitute more than 30% of the global population, they now became the most important target users for most companies. Therefore, identifying the characteristics of the millennials and reflecting them in product development is now essential to be successful in the market. Although many studies have been conducted to understand the characteristics of the millennials, they focus on the common characteristics of millennials as a whole. Method: In this study, an online survey was conducted with a total 360 millennial users. Participants responded to survey questions including the degree of interest in media and media devices, degree of media usage, types of media devices in use, goals and purposes of media usage, and the pain points of using media in a multi-device environment. Results: The results showed that the millennials were generally interested in new media devices or services and that they were willing to utilize a variety of functions to enrich their media life. Different from our expectations, however, not all of them were so active in investing money to purchase numerous media devices or services. In a multi-device environment, the millennials were consuming media using a variety of wireless devices, such as smartphones, digital camera, tablet PC, and Bluetooth speakers or headphones, but were having difficulty in using them. Conclusion & Application: This study investigated the media usage of the millennial users. The results of this study are expected to help designers to better understand the media-related characteristics of this emerging generation in more precision and to offer devices and services that millennials love.

Design and Implement a Smart Control System of Door Security Guard (도어 안전고리 스마트 제어시스템 설계 및 구현)

  • Lee, Hyo Seung;Oh, Jae Chul
    • Smart Media Journal
    • /
    • v.6 no.1
    • /
    • pp.61-67
    • /
    • 2017
  • A large number of people living in modern times prefer remaining unmarried or living alone independently for the reason of their own will or another person's will. This is because they dislike being interfered with by other persons or because there is a financial problem. This behavior has become mainstream in persons working for professional jobs, persons having a strong disposition toward individual activity or college students. In particular, career women pursuing their own comfortable life have the tendency to prefer single life. However, sometimes, they become a target of crime that targets and makes bad use of this point. For these reasons. Consequently, sometimes, they additionally install and use a security system such as door security guard at front door and so on. It is not so difficult to lock the door security guard at the front door. However, it is apt to be forgotten. And when they are on the bedspread before falling asleep, in case they should check whether the door security guard is locked or in case they should lock it, they should get up, go to the entrance, and check and lock the door security guard. They often don't lock the door security guard due to their feeling that it is all right because of annoyance and inconvenience. This paper is intended to work for safety from crime such as illegal housebreaking by more conveniently using the door security guard after designing and implementing a system that can remotely control the door security guard, using a smartphone as a method of resolving this annoyance and keeping life more safe.

A 2-D Location Determination Model of Buried Persons in Collapsed Shape using Optimal Wireless Communication Technology (최적 무선통신 기술을 활용한 붕괴지형 매몰자의 2차원 매몰위치 결정 모델)

  • Moon, Hyoun-Seok;Lee, Woo-Sik;Lee, Gun-Woo;Han, Dong-Soo
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.16 no.12
    • /
    • pp.8879-8888
    • /
    • 2015
  • When the disaster like earthquake in urban area occur, due to the collapse accidents for subway, tunnel space with buildings or underground area, enormous property and human damage are happened. Specially, since it is difficult to identify survived status of humans within collapsed debris and accurately buried locations of the humans, inputs of considerable time and manpower for rescuing them are required. Besides, secondary damage can be occurred by additional collapses. The aim of this study is to propose a stochastic location positioning method that enables to provide aid information by determining locations of mobile devices for buried persons in 2-D plane using wireless communication technologies. This study selected a detection method for buried persons based on Wi-Fi signal, and identified characteristics of signal strengths by distance unit. Using these methods, a stochastic location detection model in 2-D plane was built. It is expected that this technology will be utilized as a core technology that can protects safety and human life of the public by providing data for rescuing quickly buried persons in cases of national disasters for future.

An IT/Medical Converged Solution based on the Expert System for Enhancing U-Healthcare Services in Middle-sized Medical Environment (중소형 의료 환경에서 U-헬스케어 서비스 향상을 위한 전문가 시스템 기반 IT/의료 융합 솔루션)

  • Ryu, Dong-Woo;Kang, Kyung-Jin;Cho, Min-Su
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.11 no.4
    • /
    • pp.1318-1324
    • /
    • 2010
  • Recently, U-Healthcare is receiving attentions as a research for reducing the manpower, time in treatment, and etc. Although fundamental technologies, such as sensing, measuring, and etc. are sufficiently investigated. However, Technologies of IT/Medical convergence, which graft IT technologies to medical area, are still in germ. For this, we present a novel healthcare system, which can be applied to the middle sized medical environment, such as private hospital, home, or etc., by means of pre-verified technologies and the expert system. There exist IT element technologies are sufficiently developed in the fields, such as network, database or etc. due to the remarkable developments in IT technologies, and the healthcare is a mission-critical environment. Therefore, it is important not only to investigate novel approaches but also to utilize verified technologies for the U-Healthcare solution. Presented solution provisions automated medical services based on expert system by utilizing the measured data, such as body fat, blood pressure, blood glucose, and etc., in order to provide convenient treatment environment to doctors and nurses. In addition, since people, who do not have medical knowledge, can self-diagnose themselves, it is expected to cut medical costs in various areas. Especially, since each devices communicate with each other through standardized Bluetooth technology, Presented healthcare system is an extensible solution which can easily accept various medical devices. As a result of this, we can safely say that the self measurement and diagnosis services in U-Healthcare are now enhanced by reducing medical cost through our healthcare system.

Analysis method of patent document to Forecast Patent Registration (특허 등록 예측을 위한 특허 문서 분석 방법)

  • Koo, Jung-Min;Park, Sang-Sung;Shin, Young-Geun;Jung, Won-Kyo;Jang, Dong-Sik
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.11 no.4
    • /
    • pp.1458-1467
    • /
    • 2010
  • Recently, imitation and infringement rights of an intellectual property are being recognized as impediments to nation's industrial growth. To prevent the huge loss which comes from theses impediments, many researchers are studying protection and efficient management of an intellectual property in various ways. Especially, the prediction of patent registration is very important part to protect and assert intellectual property rights. In this study, we propose the patent document analysis method by using text mining to predict whether the patent is registered or rejected. In the first instance, the proposed method builds the database by using the word frequencies of the rejected patent documents. And comparing the builded database with another patent documents draws the similarity value between each patent document and the database. In this study, we used k-means which is partitioning clustering algorithm to select criteria value of patent rejection. In result, we found conclusion that some patent which similar to rejected patent have strong possibility of rejection. We used U.S.A patent documents about bluetooth technology, solar battery technology and display technology for experiment data.

Development of a functional game device and Contents for improving of brain activity through finger exercise (뇌활동 증진을 위한 손가락 운동용 기능성 게임 장치 및 콘텐츠 개발)

  • Ahn, Eun-Young
    • Journal of Korea Multimedia Society
    • /
    • v.15 no.11
    • /
    • pp.1384-1390
    • /
    • 2012
  • It is well known that the exercising and stimulating of fingers have an important bearing on the brain. We take note of the fact and develope a game device for improving one's health and brain ability in respect of the education and training. Especially, we develope the device focused on the balanced exercising of five finger for improving brain function. The game device is possible to used in two-ways, namely online and off-line mode. In online mode, the device is connected with other visual devices such as smart phone and smart TV and communicated with Bluetooth and it is used as a MMI(multi-modal interface) device. Whereas, in off-line mode the game device works independently and it makes possible to enjoy auditorial and tactual games without video images for promotion of brain activity and emotional cultivation. For certification of the device, we implement two games(a fishing game for off-line mode and a shooting game for online mode) for people of all age, especially good for the elderly. It is usable as a game device to offering the elderly a great help for preventing impairment of the cognitive functions.

Development of Android-Based Photogrammetric Unmanned Aerial Vehicle System (안드로이드 기반 무인항공 사진측량 시스템 개발)

  • Park, Jinwoo;Shin, Dongyoon;Choi, Chuluong;Jeong, Hohyun
    • Korean Journal of Remote Sensing
    • /
    • v.31 no.3
    • /
    • pp.215-226
    • /
    • 2015
  • Normally, aero photography using UAV uses about 430 MHz bandwidth radio frequency (RF) modem and navigates and remotely controls through the connection between UAV and ground control system. When using the exhausting method, it has communication range of 1-2 km with frequent cross line and since wireless communication sends information using radio wave as a carrier, it has 10 mW of signal strength limitation which gave restraints on life my distance communication. The purpose of research is to use communication technologies such as long-term evolution (LTE) of smart camera, Bluetooth, Wi-Fi and other communication modules and cameras that can transfer data to design and develop automatic shooting system that acquires images to UAV at the necessary locations. We conclude that the android based UAV filming and communication module system can not only film images with just one smart camera but also connects UAV system and ground control system together and also able to obtain real-time 3D location information and 3D position information using UAV system, GPS, a gyroscope, an accelerometer, and magnetic measuring sensor which will allow us to use real-time position of the UAV and correction work through aerial triangulation.

An Efficient Smart Indoor Emotional Lighting Control System based on Android Platform using Biological Signal (생체신호를 이용한 안드로이드 플랫폼 기반의 효율적인 스마트 실내 감성조명 제어 시스템)

  • Yun, Su-Jeong;Hong, Sung-IL;Lin, Chi-Ho
    • The Journal of the Institute of Internet, Broadcasting and Communication
    • /
    • v.16 no.1
    • /
    • pp.199-207
    • /
    • 2016
  • In this paper, we propose efficient smart indoor emotional lighting control system based on android platform using the biological signal. The proposed smart indoor smart emotional lighting control system were configured as the biological signal measurement device and removable smart wall pad, lighting driver, luminaire. The control system was extracts the emotional language by measured the biological signal, and it was transmitted a control signal to each lighting driver using a bluetooth in the wall pad. The lighting driver were designed to control the lighting device through an expansion board by collected control signal and the illuminance information the surrounding. In this case, the wall pad can be selecting of manual control and the bio signal mode by that indoor emotional lighting control algorithms, and it was implemented the control program that possible to partial control by selecting the wanted light. Experiment results of the proposed smart indoor emotional lighting control system, it were possible to the optional control about the luminaire of required area, and the manual control by to adjustable of color temperature with that the efficiently adjustable of lighting by to biological signal and emotional language. Therefore, were possible to effective control for improvement of concentration and business capability of indoor space business conduct by controlling the color and brightness that is appropriate for your situation. And, was reduced power consumption and dimmer voltage, lighting-current than the existing-emotional lighting control system.