• Title/Summary/Keyword: Zigbee 통신

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Implementation of the Wireless Embedded POS System Using Zigbee Communication (지그비(Zigbee)통신을 활용한 무선주문형 POS 시스템 개발)

  • Yoo, Woo-Sik;Byun, Hae-Gwon;Kim, Jae-Gon
    • Journal of Information Technology Services
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    • v.8 no.2
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    • pp.137-146
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    • 2009
  • Recently the POS system market expands rapidly due to the advance of global restaurant franchises into domestic market and increase of speciality restaurants. Especially, demand for low-cost models increases sharply as small and medium-sized retailers and restaurants adopt the POS system actively. According to the current trend of the POS system, in this study, we develop an embedded-type wireless POS system using Zigbee communication, which can be used efficiently in spacious stores without space and/or time limit. The POS system is designed and implemented with three objectives: first, we develop embedded-type POS system cheaper than PC-type POS system, second, we develop a competitive product with high quality and low cost and last, we focus on developing a POS system which can be used in the food service industry.

Indoor Navigation using Zigbee and Ultrasonic Sensor (Zigbee와 초음파 센서를 이용한 실내항법)

  • Park, Chun-Soo;Park, Heui-Sung;Kim, Jeong-Won;Hwang, Dong-Hwan
    • Proceedings of the KIEE Conference
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    • 2007.07a
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    • pp.1930-1931
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    • 2007
  • 본 논문에서는 Zigbee와 초음파 센서를 이용한 실내 항법 시스템을 제안한 시스템 Zigbee라는 단거리 무선 통신 망을 이용하여 수집한 후 이동체의 위치를 추정한다. 제안한 시스템에서는 여러 곳에 초음파 센서를 설치하고 이동체까지 측정한 거리는 실내 항법에 적합한 위치 추정 기법을 결정하기 위하여 최소자승법과 직접풀이법의 성능을 모의실험을 통하여 비교하였고, 두 기법 모두 충분히 작은 오차를 가지는 것을 확인하였는데 최소자승법은 선형화 기준점 설정에 따라 발산하는 경우가 나타나는 것을 볼 수 있었다.

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Smart Safety Management System of Industrial Site using Zigbee Communication (Zigbee 통신을 활용한 산업현장의 스마트 안전관리 시스템)

  • Min, Ji-Hyeon;Jeong, Ga-Yeong;Ha, Hyun-Dong;Hwang, In-Tae;Kim, Nam-Ho
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2022.05a
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    • pp.546-549
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    • 2022
  • In recent years, to prevent the increase in accidents at industrial sites, various innovative technologies from the 4th industrial era have been incorporated into the construction administration to promote the advancement of safety management. As a result, smart safety management systems using intelligent monitoring that prevent and manage risks in industrial sites in real time are attracting attention. Smart safety management systems provide users with real-time, remote monitoring of factors such as noise, gas concentration fine dust concentration, building material quality, building tilt, and RFID-based worker access through sensors located everywhere. This paper presents a method for collecting and monitoring various data for smart safety management systems via Zigbee communication using Raspberry Pi.

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A development of Diagnosis Monitoring System for UPS DC Link Capacitors using Zigbee Wireless Communication (Zigbee 무선통신을 이용한 UPS DC링크 커패시터의 고장 모니터링 시스템 개발)

  • Kim, Dong-Jun;Shon, Jin-Geun;Jeon, Hee-Jong
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.61 no.1
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    • pp.41-46
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    • 2012
  • Electrolytic power capacitors have been widely used in power conversion system such as inverter or UPS because of characteristics of large capacitance, high-voltage and low-cost. The electrolytic capacitor, which is most of the time affected by the aging effect, plays a very important role for the power-electronics system quality and reliability. Therefore it is important to diagnosis monitoring the condition of an electrolytic capacitor in real-time to predict the failure. In this paper, the on-line remote diagnosis monitoring system for UPS DC link electrolytic capacitors using low-cost single-chip zigbee communication modules is developed. To estimate the health status of the capacitor, the equivalent series resistor(ESR) of the component has to be determined. The capacitor ESR is estimated by using RMS computation using BPF modeling of DC link ripple voltage/current. Zigbee-based hardware experimental results show that the proposed remote capacitor diagnosis monitoring system can be applied to UPS successfully.

On-line Remote Diagnosis System for DC Bus Capacitor of Power Converters Using Zigbee Communication (Zigbee통신을 이용한 전력변환기기의 DC Bus 커패시터의 온라인 원격 고장진단 시스템)

  • Chung, Wan-Sup;Shon, Jin-Geun
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.64 no.1
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    • pp.29-34
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    • 2015
  • DC bus electrolytic capacitors are used in variety of equipments as smoothing element of the power converters because it has high capacitance for its size and low price. It is responsible for frequent breakdowns of many static converters and inverter drive systems. Therefore it is important to diagnosis monitoring the condition of an electrolytic capacitor in real-time to predict the failure of power converter. In this paper, the on-line remote diagnosis monitoring system for DC BUS electrolytic capacitors of power converter using low-cost type Zigbee communication modules is developed. To estimate the health status of the capacitor, the equivalent series resistor(ESR) of the component has to be determined. The capacitor ESR is estimated by using RMS computation using AC coupling method of DC link ripple voltage/current. The Zigbee communication-based experimental results show that the proposed remote DC capacitor diagnosis monitoring system can be applied to DC/DC converter and UPS successfully.

A study on lighting system for LED color temperature control using wireless communication and smartphone (무선 통신과 스마트폰을 이용한 LED 색온도 제어 조명 시스템에 관한 연구)

  • Hong, Young-Jin;Lim, Soon-Ja;Lee, Wan-Bum
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.18 no.11
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    • pp.72-77
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    • 2017
  • Lighting systems in modern society has been developed using a combination of IT technology and LED lighting for the purpose of bringing about changes in human-centered natural lighting and to take advantage of the efficient management and energy saving of LED lighting. In this paper, we propose an LED lighting control system that can control the color temperature and brightness of LED lighting composed of 3000K Warm LEDs and 6000K Cool LEDs by using an Arduino Due and wireless communication technology such as Bluetooth and Zigbee. The Arduino Due allows the color temperature of the lighting to be adjusted in several steps by controlling the duty rate and enables many lights to be controlled using Zigbee communication capable of 1: N multiple communication. By using Bluetooth communication, it is possible to easily control the LED lighting by means of a smartphone application, thereby enhancing the convenience for the user. The wireless communication based LED lighting control system implemented in this study cannot only provide human-centered lighting through its color temperature control from 3067K to 5960K and illumination control, but can also reduce the power consumption and be used as a natural-friendly lighting system.

Implementation of Home Gateway System using Cellular Phone and Sensor Network on Ubiquitous Environment (유비쿼터스 환경에서 휴대폰과 센서를 이용한 홈 게이트웨어 시스템 구현)

  • Choi, Seong-Kyou;Lee, Hei-Kyung;Kim, Jun-Kyu;Lee, Jong-Kee;Jung, Heon-Man;Lee, Se-Hoon
    • KSCI Review
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    • v.14 no.2
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    • pp.123-127
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    • 2006
  • In this paper, we designed and implemented home gateway system for remote control of home appliances and devices using cellular phone. The system communicate home devices through Zigbee protocol and home server based on Linux operating system communicate cellular phone through external networks. We expect that the system apply various fields as home automations, home network, smart offices, and ubiquious environments.

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A study of LED light control system application based on Ubiquitous sensor network (유비쿼터스 센서 네트워크 기반 LED 조명제어시스템 적용에 관한 연구)

  • Lee, An-kyu;Park, Byung-don;Gil, Jun-pyo;Shin, Gang-wook;Park, Hye-Mi
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2013.10a
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    • pp.188-191
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    • 2013
  • In this paper, in order to economize energy inside the vertical-type water treatment plant, a chamber-illumination-LED control board, which operates via nature light or human's touches, is proposed. Moreover, this illumination control process is contrived to be wirelessly monitored in real-rime. In addition, Zigbee communication code is programmed to implement the control board's function of wireless data transmission and automatic LED brightness control. The presented control method contrives brightness to be adjusted in real-time by dimming control, which means nature light changes control, so that the interior energy can realize the maximum energy conservation.

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A Study Effective Zigbee Authentication Protocol in Smart Grid Network (스마트 그리드 네트워크에서 효과적인 Zigbee 인증 프로토콜에 관한 연구)

  • Im, Song-Bin;Oh, Young-Hwan
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.36 no.2B
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    • pp.184-194
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    • 2011
  • Security is critically important for smart grid networks that are usually used for the electric power network and IT environments that are opened to attacks, such as, eavesdropping, replay attacks of abnormal messages, forgery of the messages to name a few. ZigBee has emerged as a strong contender for smart grid networks. ZigBee is used for low data rate and low power wireless network applications. To deploy smart grid networks, the collected information requires protection from an adversary over the network in many cases. The security mechanism should be provided for collecting the information over the network. However, the ZigBee protocol has some security weaknesses. In this paper, these weaknesses are discussed and a method to improve security aspect of the ZigBee protocol is presented along with a comparison of the message complexity of the proposed security protocol with that of the current ZigBee protocol.

Study for Chronic Diseases Patients Management System using Zigbee of based WPAN (WPAN 기반의 Zigbee를 이용한 만성질환 환자 관리 시스템에 관한 연구)

  • Park, Hung-Bog;Seo, Jung-Hee
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.15 no.4
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    • pp.965-972
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    • 2011
  • As an aged population has increased in Korea, the number of patients with chronic disease has soared up as well. The rapid increase of the chronic disease triggers a need of new paradigm of healthcare. In terms of data transmission of healthcare system, a use of data-transmission protocol based on bluetooth could be dismal in application of healthcare due to its postponement of connection. On the contrary, WPAN is evaluated to be proper to support the application of healthcare in restricted geographic areas. In addition, the bluetooth, a base of the current wireless network, doesn't support a special mechanism to cope up with emergent patients because of its delayed connection among devices. Against this backdrop, this study aims to design an integrated interface of multi bio-sensing and suggest a measuring and monitering system for the patients with chronic illnesses by using Zigbee of WPAN as a sufficient bandwidth is anticipated owing to frequent deliveries of complicated biological signals.