Earticle

Recent intensive initiative of a green energy by Japan government has brought discussion about new technology standardization for communication and energy management. Energy saving method is increasingly important in Home Network System. In order to get energy management system, the unified specifications are required in each device. As a result, several new standards needed to be followed i.e. ECHOENT lite, ARIB T-108, JJ300.10V1. This paper introduces the method of design for Wireless ECHOENT lite communication module design. This proposed method satisfies these requirements. Finally the protocol of the module was validated by using the ECHOENT Lite Tester.

In this paper, we propose the design and implementation of a novel Home Energy Management System (HEMS), which is comprises of 3 major components; 1) Communication Interface (CI), 2) Energy Management Mechanism (EMM), and 3) user interface (UI). Communication Interface provides a robust command & control, information follow and system incorporation. Energy Management Mechanism manages the generation, storage and consumption of electricity based on weather forecast, utility projection, and user demand. User Interface of our system is not limited to single dedicated visual display but widely accessible on smart pad, Personal Computer (PC), smart phone and smart TV

본 논문에서는 차량 환경에 적합하게 설계된 C-ITS 통신프로토콜과 이동 통신 프로토콜인 Legacy LTE 통신 기술을 함께 지원하는 하이브리드 V2X 통신모듈의 하드웨어 및 소프트웨어에 대한 설계 방안을 제안하고 설계과정을 제시한다. C-ITS는 저 지연 특성으로 인해 안전 서비스 어플리케이션에 적합하며, Legacy LTE는 고지연, 고용량 특성으로 인해 교통정보, 인포테인먼트와 같은 비 안전 어플리케이션에 적합한 기술이다. 하이브리드 V2X 통신 모듈은 복수의 통신기술로 WAVE와 LTE를 지원하고, WAVE에 대해서는 복수채널 통신을 지원하여, 자율주행 차량에 LDM, 측위보정정보 등의 도로정보를 실시간으로 전달하기 위한 목적으로 설계된다. 본 논문에 제시된 주요 설계 결과는 향후 차량용 하이브리드 V2X 통신 단말기 구현에 적용될 예정이다.

In this paper, we propose a design method and process for hardware and software of hybrid V2X communication module that supports both C-ITS communication protocol designed for vehicle environment and Legacy LTE communication technology. C-ITS is suitable for safety service applications due to its low latency characteristics, and Legacy LTE is a technology suitable for non-safety applications such as traffic information and infotainment due to high latency and high capacity. The hybrid V2X communication module supports multiple communication technologies of WAVE and LTE, in which WAVE supports multiple channels, so that it is designed to transmit road information such as LDM and positioning correction information to an autonomous vehicle in real time. The main design results presented in this paper will be applied to the implementation of future hybrid V2X communication terminals for vehicles.

Efforts to obtain more efficient coupling of light from a laser diode to a single mode fiber have continued for various applications such as links for optical fiber communication systems. In TO-can package, configuration of optimized aspherical lens is bi-aspheric and its diameter is 2.4mm. We designed and fabricated aspherical coupling lens by means of glass molding technique under consideration of glass shrinkage. By controlling the aspherical profile error and surface roughness which were below 90nm and 10nm, respectively, we obtained the low coupling loss, 5.40dB, which was able to use for coupling a single mode fiber to laser diode.

The automatic assembly system of micro optical filter is a key technology in the development of optical modules with high functionality. In order to develop an automatic assembly system of optical fiber and filter, we have firstly developed the system and program capable of characterization of 30${\mu}m$-thick film filters as well as conventional optical filters. Moreover, we have carried out the characterization of optical filter using the developed system and program, and compared experimental results with by conventional handwork. The measurement of optical filters using the present system is faster, more precise and more reliable than those based on the conventional handwork.

차량 내부에서는 컨트롤러, 센서, 텔레매틱스 단말기, 내비게이션, 오디오 및 비디오 등 다양한 모듈들이 CAN이나 MOST와 같은 차량 네트워크를 통해 연결되어 있다. 게다가, 사용자는 이동 중에 무선 모바일 네트워크를 이용하여 ITS나 인터넷에 접속할 수도 있다. 이러한 네트워크의 다양한 활용은 데이터 해킹, 프라이버시 침해, 위치 추적 등과 같은 많은 보안 문제를 야기하게 된다. 또한, 차량 운영 데이터(센서, 제어 데이터)를 해킹함으로써 차량을 고장 내거나 사고를 유발할 수 있는 가능성도 점차 커지고 있다. 본 논문에서는 CAN이나 MOST와 같은 차량 네트워크에 적용할 수 있는 암호화 기능을 가지는 보안 모듈을 제안한다. 이 보안 모듈은 DES, 3-DES, SEED, ECC 및 RSA와 같은 일반적인 암호화 알고리듬과 전자서명 기능을 제공하게 된다.

Many modules such as controller, sensor, telematics terminal, navigation, audio and video are connected each other via vehicle network (CAN, MOST, etc). Futhermore, users can have ITS or internet services in moving by connecting to wireless mobile network. These network capabilities can cause a lots of security issues such as data hacking, privacy violation, location tracking and so on. Some possibilities which raise a breakdown or accident by hacking vehicle operation data (sensor, control data) are on the increase. In this paper, we propose a security module which has encryption functionalities and can be used for vehicle network system such as CAN, MOST, etc. This security module can provide conventional encryption algorithms and digital signature processing functionality such as DES, 3-DES, SEED, ECC, and RSA.

사물인터넷(IoT, Internet of Things)은 전자기기뿐만 아니라 모든 사물을 인터넷에 연결해 사물과 사물간, 그리 고 사물과 사람 간 상호작용을 하는 것을 뜻한다. 본 논문에서는 실험단계를 거쳐 최종적으로 WiFi에 의한 통신모듈이 완벽하게 동작하여 빨간, 초록, 파란색의 LED가 점멸됨을 확인하였다. 해외에서 각광을 받고 있는 사물인터넷 기반의 ‘개방형 플랫폼’인 아두이노(Arduino)와 통신모듈을 이용하여 LED Dimming 제어을 수행하였다.

The Internet of Things (IoT) refers to the interaction of objects and objects, as well as electronic devices, with all things connected to the Internet. In this paper, it is confirmed that red, green and blue LEDs are blinking because the communication module by WiFi finally operates through the experimental stage. LED dimming control was carried out using Arduino, a 'open platform' Internet-based object, which is in the limelight from overseas and a communication module.

본 논문에서는 내시경 장비를 위한 UWB 통신모듈을 결합한 무선 내시경 기술 개발에 관한 연구를 진행하였다. 먼저, 국내외 UWB 통신기술 분야 및 국내 내시경 분야의 동향을 통하여 본 논문에서 제안하고자하는 UWB 무선 내시경 기술 개발에 관한 연구의 필요 성에 대하여 제시하였으며, 그 필요성을 토대로 UWB 통신모듈을 결합한 무선 내시경을 개발하였다. 본 논문에서 제안하는 UWB 무선 내시경 기술은 기존의 내시경 영상취득 방식과는 다르게 유·무선 UWB 통신방식을 사용하여 내시경 영상을 취득할 수 있으며, 인체의 영상을 높은 전송률로 전송하며, 팬텀을 이용한 임상데이터에 기반한 DB화 및 스마트폰을 연동하는 기술 등 기존에는 없던 새로운 개념으로, 효과적이고 신뢰성있는 진단이 가능하다. 본 논문에서 제안한 UWB 통신모듈을 결합한 무선 내시경 기술은 UWB 통신기술의 응응사례로서 널리 활용될 수 있을 것으로 기대된다.

In this paper, we proceeded a study about the wireless endoscopic technology development combined with UWB communication module for endoscope. Firstly, we proposed needs of UWB wireless endoscope technology development related to domestic endoscope industry and UWB communication technology. Also, we develop a wireless endoscope combined with UWB communication module. In this paper, the proposed UWB wireless endoscope technology can acquire a endoscope image using UWB communication method. It can transfer a image at high data rate using DB and Smart Device linkage technology, an effective and trusted diagnosis is possible. The proposed UWB wireless communication module combined with UWB communication module is expected to be widely utilized.

이 연구의 목적은 창의적이고 융합적인 교육활동 분야에서 활발히 적용되고 있는 아두이노(Arduino)를 이용하여, 학생들이 전기·전자·통신과 관련된 하드웨어 및 소프트웨어 지식을 실제적 경험을 통해 자연스럽게 익혀나갈 수 있도록 아두이노를 기반으로 한 블루투스 통신이 가능한 구동장치 제어 모듈을 설계 및 구현하는데 있다. 이 연구를 통하여 얻은 결과를 요약하면 다음과 같다. 첫째, 아두이노와 여러 엑츄에이터(Actuator)를 서로 연동시키는 실험을 통해 아두이노와 구동장치의 기본적인 상호특성과 성능을 확인하였다. 둘째, 아두이노 플랫폼(Platform)을 이해하고, 구동장치 회로 설계 및 제작, 스케치(프로그래밍) 작성을 통해 전기전자통신 시스템을 구현할 수 있는 능력, 논리적 사고력과 문제해결력의 기초적인 기반을 만들었다. 셋째, 아두이노 플랫폼을 기반으로 블루투스 통신형 구동장치 모듈을 설계 및 구현하였다.

The purpose of this study is to use Arduino platforms to have students are being actively applied in the field of educational activities of creative and convergence, and also to design an Actuator Module Based on Arduino so that they can naturally acquire IT(Information Technology) based hardwares and softwares. The main results of this study are as follows: First, the basic characteristics and performance of interaction of Arduino and actuators were confirmed by interlocking experiment between them. Second, the fundamental Teaching-Learning environments of abilities such as implementing EEC systems, thinking logically, and problem-solving skills were provided by understanding Arduino platform, designing an actuator circuit and manufacturing, the creation of sketches as programming. Third, an actuator module with bluetooth communication was designed and manufactured based on the Arduino platform.

가스센서는 그 용도에 따라서, 자동차용(배출가스, 연료혼합 가스, 산소, 분진), 농수산․식품산업용(신선도, 저장, CO2, 습도, NH3, 질소산화물 가스, 유기가스, 농약 및 살충제로부터 방출되는 유독가스), 산업․의료용(석유화학제품 가스, 수소, 산소, 유독가스), 군사용(화학무기 가스), 환경 측정용(CO를 비롯한 황과 질소 등으로 구성된 대기오염가스), 가정용(LNG, LPG, 부탄, 실내공기, 습도) 등으로 매우 다양하게 사용하고 있다. 산업 현장의 유해물질 종류는 약 700종으로 알려져 있으며 이들 중 대다수의 물질은 일반적인 환경 조건에서 가스 형태로 존재한다. 본 연구에서는 이러한 유독 가스들 중에서 차량 내부 등의 밀폐된 공간에서 발생하기 쉬운 중요한 탄소(CO), 이산화탄소(CO2), 암모니아 (NH3)의 세 가지 가스를 검출하는 휴대용 가스센서 모듈을 구현하고자 한다. 유독 가스 중에서도 가장 인명 사고의 중요한 요소인 NH3, CO2, CO의 3종류 가스를 검출하는 다중 가스검출 센서에 대해 연구한다.

Gas sensors has been used very differently that depending on following purposes; Automotive (exhaust gas, fuel mixture gas, oxygen, particulates), agriculture / food industry (fresh, stored, CO2, humidity, NH3, nitrogen oxide gas, organic gas, toxic gas emitted from pesticides and insecticides), industrial / medical (chemical gas, hydrogen, oxygen and toxic gases), military (chemical weapon), environmental measurements (CO and other air pollution consisting of sulfur and nitrogen gas), residential (LNG, LPG, butane, indoor air, humidity). The types of industrial toxic substances are known about 700 species and many of these exist in gaseous form under normal conditions. he multi-gas detection sensors will be developed for casualties that detect the most important and find easy three kinds of gases in marine plant; carbon dioxide(CO2), carbon(CO), ammonia(NH3). Package block consists of gas sensing device minor ingredient, rf front end, zigbee chip. Develope interworking technology between the sensor and zigbee chip inside a package. Conduct a performance test through test jig about prototype zigbee sensor module with rf output power and unwanted emission test. This research task available early address when poisonous gas leaked from large industrial site and contribution for workers' safety at the enclosed space.

도시의 많은 교량 구조물은 내구연한 및 노후 상태에 따라 외형적 변형이 발생하고, 지진과 태풍 등은 노후 시설물의 변형을 더욱 악화시키고 있다. 불규칙하고 미세한 점진적 외형 변형은 육안으로 확인하기 어렵고, 시설물의 성능을 저하시키게 된다. 따라서 최근에 교량 구조물의 이상 거동을 실시간의 무선 방식으로 검지하는 기술이 연구되고 있다. 본 연구는 자이로스코프를 이용하여 구조물의 미소한 물리적 변화량을 실시간으로 측정하는 변위측정모듈을 개발하였다. 개발된 계측 모듈의 성능은 시뮬레이션 실험을 통해 검증하였다.

Lots of bridge structure generated the change of outward formation according to durability capability and decrepitude by long use. Especially, in case of the typhoon, snowing and earthquake is going to make rapidly more worse formation about the old structural facilitys. Also, outward formation by irregular and micro-distortion in bridge structure could not easily checked by normal diagnostics method. As a result, performance-capability of structure facility is getting to make a decline in standard of structure performance. Recently, real-time monitoring technology by wireless environment go into the study of irregular movement for structure facility. This paper presents the development of sensor to displacement checking about bridge structure. Sensing method of developed sensor put bring into the gyroscope technology using the acceleration speed and angular acceleration speed. This paper also will simulated to verified the monitoring capability of developed sensor against random vibration, frequency and distortion in simulated equipment.

We studied on the design of a sprinkler control system that communicates with the administrator's mobile through a wireless communication network and a sprinkler unit that sprays water on the vegetation area. This sprinkler control system consists of a communication module that receives an operation signal for the operation of the sprinkler unit from the administrator's mobile, and a control module that controls the sprinkler unit according to the operation signal received through the communication module. It is also designed to control sprinkler units by measuring temperature, humidity, light intensities, vibration and field images in the vegetation area in real time through sensors and camera for each of them and comparing them with established limit criteria. The sprinkler allows the administrator to control the sprinkler more easily because the administrator operates the sprinkler through the mobile from a distance, and emergency situations occur and can respond quickly.

We purposed to develop a floating communication module equipped with LoRa and GPS technologies to enhance underwater drone operations by enabling real-time location tracking and long-range wireless communication. While previous studies focused on underwater communication systems, few have quantitatively analyzed how enclosure materials affect signal performance in real-world marine environments. To address this, we designed a sealed communication system and experimentally evaluated its signal sensitivity and positioning accuracy under open, PLA-sealed, and acrylic-sealed conditions. Through static positioning tests and LoRa signal strength measurements, we found that the acrylic enclosure maintained reliable performance, with only a 21.1% increase in GPS error and a 16.7% reduction in communication range compared to the open state. In contrast, the PLA case showed significant signal degradation. These results demonstrate that case materials directly impact the communication quality of underwater systems and confirm the acrylic case as a practical option for marine deployment. We contribute to the development of modular and efficient AUV communication systems by experimentally verifying enclosure-dependent signal performance and proposing a deployable design suitable for real ocean environments.

As GPS technology has been developed with other mobile communications, GPS function is essentially loaded on mobile devices including smartphone and tablet PC. Thus, users can exchange information based on the current location of the GPS through the application service such as path-finding and current velocity. However, since it is difficult to identify accurate means of transportation of a user, there is limitation on providing high-quality service and information. For instance, it causes unnecessary data consumption that providing unnecessary traffic information to a user walking or riding city rails.