Abstract:
본 발명은 물체 위치 추정 장치 및 방법에 관한 것으로, 임의 장소, 예컨대 야적장에 배치한 물체의 위치를 손쉽게 정확히 추정할 수 있으며, 부분적인 블록단위로 제작하여 일체로 조립하기 전까지 야적장에 배치한 조립블록의 위치를 추정하는 용도로 이용할 경우에는 조립블록의 위치를 손쉽게 정확히 추정할 수 있으므로 선박 등과 같은 대형 구조물을 제작하는 산업 현장에서 조립블록의 관리가 용이해져 작업의 효율성이 향상되는 이점이 있다. 물체 위치, 조립블록 위치, 초광대역 위치 측위
Abstract:
PURPOSE: A circularly polarized antenna having a wide beam width is provided to transmit and receive circular polarized waves through four U-shaped metal strips arranged in a circular shape on a grounding surface. CONSTITUTION: A circular polarized antenna having a wide beam width comprises a grounding surface(150) formed of a metal plate such as aluminum, a center patch(160) formed in the top center of the grounding surface, a plurality of radial patches(110,120,130,140) formed around the center path, and metal posts. The center path controls information on the connection of the radial patches to facilitate adjustment of input impedance. An electric feed part is formed in the center of each radial patch so that signals having the same magnitude and a phase difference are supplied to the radial patches.
Abstract:
PURPOSE: An underground method of an underground RFID tag is provided to maximize recognition distance by controlling a shape of an ground plate and installing the tag to be straight with an underground surface or to a little bit protrude than an earth's surface. CONSTITUTION: A ground plate(400) is bigger than the diameter of an RFID(Radio Frequency ID) tag(200) or a tag antenna, and equips the RFID tag to the top. The ground plate makes a little bit protrude the RFID tag than an earth's surface or makes straight the lower surface of the RFID tag with the earth's surface. The ground plate is composed of metal materials and has a cylinder or square pillar shape. The inside of the ground plate is empty or is filled to insulating materials.
Abstract:
PURPOSE: A block state recognition device and method thereof are provided to supply the high accuracy by automatically recognizing a block loading or unloading state of a transfer vehicle. CONSTITUTION: An information obtaining unit(110) obtains state information which shows a block loading state from a transfer vehicle. A data processor(120) classifies state information and filters state information. A state recognition unit(130) recognizes the loading or the unloading state of the block based on reference data and supplies recognition information.
Abstract:
PURPOSE: A ship block placement device and a method thereof for reducing the decision error of a ship block arrangement are provided to reduce the error of the ship block arrangement by performing efficient batch process. CONSTITUTION: A database stores the location information of a ship block. A video photographing unit(110) takes a photograph of the monoscopic image and front image about the ship block. A block image processor(120) extracts topology data of the ship block from the monoscopic image. The block image processor extracts the feature point information from the front image information. A block arrangement decider(130) uses the location information of the ship block, topology data and standard information.
Abstract:
PURPOSE: A system and a method for estimating the position of a ship block are provided to efficiently estimate the position of a ship block by integrating an image sensor, a piezoelectric sensor, a GPS(Global Positioning System), and a DMI(Distance Measurement Integrator). CONSTITUTION: A system for estimating the position of a ship block comprises an image sensor(120), a piezoelectric sensor(140), a navigation sensor(160), and a position measurement server(200). The image sensor obtains an image of the assembly block for a ship. The piezoelectric sensor is installed in a transporter(100) and generates piezoelectric sensor information when pressure is applied from the assembly block for a ship which is loaded in the transporter. The navigation sensor obtains distance information and location information from the transporter.
Abstract:
A wireless sensor network using the dynamic message transmitting method and a control method thereof are provided to improve the throughput per node and remove the necessity of an MAC(Media Access Control) layer by calculating/updating the message relay probability of each sensor node and dynamically determining a node for relaying a message based on the calculated result. A destination node broadcasts a beacon signal to nodes within a network. A transmission node sends a transmission request message to neighboring nodes to select a relay node for relaying a message, receives response messages from the neighboring nodes which determine a response based on the relay probability, and then selects the relay node based on the response messages. The relay node receives the beacon signal, measures the strength of the beacon signal, and then transmits a response message including information about the strength to the transmission node.
Abstract:
A low-power routing method using the time synchronizing method and reservation technique in a wireless sensor network, and an apparatus for performing the same are provided to minimize the power consumption and termination delay of each node in a wireless sensor network environment based on the mesh topology. A low-power routing apparatus comprises a time synchronization and low-power routing execution part(401) which includes a synchronous packet generator(405), a synchronization performing unit(407) and a reservation packet generator(409). The synchronous packet generator produces a synchronization packet for the time synchronization of a network in a preset synchronization region. The synchronization performing unit performs the time synchronization of the network by using the synchronization packet. The reservation packet generator produces a reservation packet for the reservation transmission of data in the network in which the time synchronization is performed. A transceiver(403) transmits and receives the data, synchronization packet and reservation packet according to the control of an upper layer block.
Abstract:
A method and a system for guiding a visitor using the sensor network are provided to guide the visitor from a starting position to a destination position or from the destination position to the starting position through a visitor terminal by using the sensor network constructed in a building. An entry approver requests entry of a visitor to a terminal(70) of a person to visit according to destination information received from the visitor. A course setting part sets a course for guiding the visitor terminal(10) to the destination position by using the destination information of the visitor according to an approval of the terminal of a person to visit. A location searcher searches and provides a current position of the visitor terminal by using a visitor terminal ID obtained through the sensor network and location information of a sensor node(20) communicating with the visitor terminal. A location checker checks whether the present location of the visitor searched from the location searcher is out of a predetermined range. A door controller enables the visitor terminal to open/close a door installed at the destination position.
Abstract:
1. 청구범위에 기재된 발명이 속한 기술분야 본 발명은 이동형 광대역 양방향 위성접속 시스템에서의 망관리 장치에 관한 것임. 2. 발명이 해결하려고 하는 기술적 과제 본 발명은 시스템 구성 요소인 각 모듈들에 대한 관리 대상 정보를 SNMP 에이전트가 위치한 모듈과 수집데이터의 특성에 따라 적절한 통신 인터페이스를 사용하여 원활하게 수집하도록 함으로써, 망을 보다 효율적으로 관리하기 위한 이동형 광대역 양방향 위성 접속시스템에서의 망관리 장치를 제공하는데 그 목적이 있음. 3. 발명의 해결방법의 요지 본 발명은, 이동형 광대역 양방향 위성접속 시스템에서의 망관리 장치에 있어서, 위성을 통한 양방향 멀티미디어 서비스를 위한 각 노드들의 구성 정보 및 형상 정보를 텍스트 및 이미지화하여 운용자에게 제공하기 위한 정보 제공수단; 상기 시스템을 통해 보고되는 장애 및 경보 정보를 분석하여, 그 결과를 운용자에게 전달하기 위한 장애 및 경보 관리수단; 상기 정보 제공수단으로부터 시스템 형상 관리 요구 메시지 수신 후, 상기 메시지 내용에 따라 상기 시스템 운용에 필요한 하드웨어 정보들을 데이터베이스를 통해 등록, 삭제, 변경 및 검색하거나, 중심국 및/또는 단말국으로 메시지를 전송하기 위한 형상 및 상태 관리수단; 운용자에게 동적자원관리기에서 할당한 자원의 이용 현황 및 DVB-S 기반한 연결접속 테이블 정보 들을 텍스트 형식이나 시각적으로 도시해주기 위한 자원 디스플레이수단; 상기 정보 제공수단을 통해 새로운 가입자를 등록하고, 등록된 가입자 정보(변경 및 해지)를 검색할 수 있도록 하기 위한 가입자 관리수단; 운용자로부터의 접근 요청에 따라, 계정과 패스워드를 확인하여 올바른 운용자인지를 인증하기 위한 인증 관리수단; 및 각 모듈의 SNMP(Simple Network Management Protocol) 에이전트와 관리 대상이 되는 정보를 요청하는 메시지와, 각 모듈의 초기화 정보를 설정하는 메시지를 전송하고, 상기 SNMP 에이전트로부터 관리대상 정보의 요청에 따른 응답 메시지와 모듈 운용에 따른 오류 메시지를 수신하기 위한 SNMP 관리수단을 포함한다. 4. 발명의 중요한 용도 본 발명은 이동형 광대역 양방향 위성접속 시스템 등에 이용됨. 위성통신, 이동형 광대역 양방향 위성접속 시스템, 망관리 장치, 이동형 광대역 액세스망, SNMP, UDP