This paper presents a distributed wireless sensor network for multiple mobile agents localization. Localization of mobile agents, such as mobile robots, humans, and moving objects, in an indoor space is essential for ...This paper presents a distributed wireless sensor network for multiple mobile agents localization. Localization of mobile agents, such as mobile robots, humans, and moving objects, in an indoor space is essential for robot-robot interaction (RRI) and human-robot interaction (HRI). The standard localization system, which is based on sensors installed in the robot body, is not suitable for multiple agents. Therefore, the concept of sensor network, which uses wireless sensors distributed in a specified space, is used in this study. By analyzing related studies, two solutions are proposed for the localization of mobile agents including humans: a new hardware system and a new software algorithm. The first solution focuses on the architectural design of the wireless sensor network for multiple agent localization. A passive RFID system is used, and then the architecture of the sensor network is adapted to suit the target system. The second solution centers on a localization algorithm based on the sensor network. The proposed localization algorithm improves the accuracy in the multiple agent localization system. The algorithm uses the displacement conditions of the mobile agents and the recognition changes between the RFID tags and RFID reader. Through experiments using a real platform, the usefulness of the proposed system is verified.展开更多
射频识别技术(Radio frequency identification,RFID)是物联网感知层的关键技术之一,且具有非接触自动识别功能。近年来,RFID技术在结构健康监测领域迅速发展,引起了科研工作者的广泛关注与研究。RFID技术与传感技术结合所制备的传感标...射频识别技术(Radio frequency identification,RFID)是物联网感知层的关键技术之一,且具有非接触自动识别功能。近年来,RFID技术在结构健康监测领域迅速发展,引起了科研工作者的广泛关注与研究。RFID技术与传感技术结合所制备的传感标签具有无源无线传输、寿命长、成本低的优势,被广泛应用于结构监测、环境监测、健康监测、流体检测等领域。目前,RFID传感标签主流的制备工艺有导电油墨印制法、柔性电路板制备法等,制备工艺的选择进一步影响了RFID标签的传感和通信功能。本文从柔性电路板工艺、丝网印刷工艺、喷墨打印工艺原理出发,概述了这三种工艺制备RFID传感标签的发展进程,并分析了目前其制备RFID传感标签所面临的挑战。同时,对这三种工艺制备RFID传感标签天线层进行了总结,在此基础上对这三种工艺制备RFID传感标签的未来发展前景进行了展望。展开更多
Tracking persons in dangerous situations as well as monitoring their physical condition, is often crucial for their safety. The systems commonly used for this purpose do not include individual monitoring or are too ex...Tracking persons in dangerous situations as well as monitoring their physical condition, is often crucial for their safety. The systems commonly used for this purpose do not include individual monitoring or are too expensive and intrusive to be deployed in common situations. In this project, a mobile system based on energy-efficient wireless sensor networks (WSNs) and active radio frequency identification (RFID) has been developed to achieve ubiquitous positioning and monitoring of people in hazardous situations. The system designed can identify each individual, locate him/her, send data regarding their physical situation, and ascertain whether they are located in a confined space. A new algorithm called time division double beacon scheduling (TDDBS) has been implemented to increase operation time and data transmission rate of the nodes in the system. The results show that the use of this system allows us to find the location and state of a person, as well as to provide an analysis of the potential risks at each moment, in real time and in an energy-efficient way. In an emergency, the system also allows for quicker intervention, as it not only provides the location and causes of the event, but also informs about the physical condition of the individual at that moment.展开更多
文摘This paper presents a distributed wireless sensor network for multiple mobile agents localization. Localization of mobile agents, such as mobile robots, humans, and moving objects, in an indoor space is essential for robot-robot interaction (RRI) and human-robot interaction (HRI). The standard localization system, which is based on sensors installed in the robot body, is not suitable for multiple agents. Therefore, the concept of sensor network, which uses wireless sensors distributed in a specified space, is used in this study. By analyzing related studies, two solutions are proposed for the localization of mobile agents including humans: a new hardware system and a new software algorithm. The first solution focuses on the architectural design of the wireless sensor network for multiple agent localization. A passive RFID system is used, and then the architecture of the sensor network is adapted to suit the target system. The second solution centers on a localization algorithm based on the sensor network. The proposed localization algorithm improves the accuracy in the multiple agent localization system. The algorithm uses the displacement conditions of the mobile agents and the recognition changes between the RFID tags and RFID reader. Through experiments using a real platform, the usefulness of the proposed system is verified.
文摘射频识别技术(Radio frequency identification,RFID)是物联网感知层的关键技术之一,且具有非接触自动识别功能。近年来,RFID技术在结构健康监测领域迅速发展,引起了科研工作者的广泛关注与研究。RFID技术与传感技术结合所制备的传感标签具有无源无线传输、寿命长、成本低的优势,被广泛应用于结构监测、环境监测、健康监测、流体检测等领域。目前,RFID传感标签主流的制备工艺有导电油墨印制法、柔性电路板制备法等,制备工艺的选择进一步影响了RFID标签的传感和通信功能。本文从柔性电路板工艺、丝网印刷工艺、喷墨打印工艺原理出发,概述了这三种工艺制备RFID传感标签的发展进程,并分析了目前其制备RFID传感标签所面临的挑战。同时,对这三种工艺制备RFID传感标签天线层进行了总结,在此基础上对这三种工艺制备RFID传感标签的未来发展前景进行了展望。
文摘Tracking persons in dangerous situations as well as monitoring their physical condition, is often crucial for their safety. The systems commonly used for this purpose do not include individual monitoring or are too expensive and intrusive to be deployed in common situations. In this project, a mobile system based on energy-efficient wireless sensor networks (WSNs) and active radio frequency identification (RFID) has been developed to achieve ubiquitous positioning and monitoring of people in hazardous situations. The system designed can identify each individual, locate him/her, send data regarding their physical situation, and ascertain whether they are located in a confined space. A new algorithm called time division double beacon scheduling (TDDBS) has been implemented to increase operation time and data transmission rate of the nodes in the system. The results show that the use of this system allows us to find the location and state of a person, as well as to provide an analysis of the potential risks at each moment, in real time and in an energy-efficient way. In an emergency, the system also allows for quicker intervention, as it not only provides the location and causes of the event, but also informs about the physical condition of the individual at that moment.
