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(Radio Frequency Identification,RFID)传感技术可实现多个用户的同时低功耗无线呼吸监测,在可穿戴智慧医疗健康领域倍受关注。在概述各种呼吸监测技术基础上,重点回顾了采用柔性RFID传感技术,特别是纺织基柔性传感器监测呼吸...射频识别(Radio Frequency Identification,RFID)传感技术可实现多个用户的同时低功耗无线呼吸监测,在可穿戴智慧医疗健康领域倍受关注。在概述各种呼吸监测技术基础上,重点回顾了采用柔性RFID传感技术,特别是纺织基柔性传感器监测呼吸的基本原理和相关研究现状,比较分析了不同RFID传感方法用于呼吸监测的优缺点,最后提出了在呼吸监测领域应用纺织基RFID传感技术时面临的主要挑战和研究方向。展开更多
设计一种基于RFID和传感器技术的推土机状态监测与故障诊断系统,以提高推土机在建筑和工程领域的性能、安全性和可靠性。系统采用射频识别(Radio Frequency Identification,RFID)技术和传感器技术,实时监测推土机的关键参数,如油温、发...设计一种基于RFID和传感器技术的推土机状态监测与故障诊断系统,以提高推土机在建筑和工程领域的性能、安全性和可靠性。系统采用射频识别(Radio Frequency Identification,RFID)技术和传感器技术,实时监测推土机的关键参数,如油温、发动机转速、冷却水温度、油压等,以及液位和发动机计时。通过无线传感器网络将数据传输到协调器节点,再发送到远程管理中心进行分析和诊断。展开更多
氨气是畜禽场景中的主要有害气体之一,针对有源传感器不适于电路有线连接受限的畜禽场景问题,该研究基于高频电磁仿真软件(high frequency structure simulator,HFSS)设计了无源传感器仿真模型,选择聚酰亚胺(polyimide,PI)作为基板材料...氨气是畜禽场景中的主要有害气体之一,针对有源传感器不适于电路有线连接受限的畜禽场景问题,该研究基于高频电磁仿真软件(high frequency structure simulator,HFSS)设计了无源传感器仿真模型,选择聚酰亚胺(polyimide,PI)作为基板材料,采用丝网印刷技术研制了基于射频识别(radio frequency identification,RFID)原理的无源氨气传感标签。通过对氨气无源检测原理的解析,选择了具有高表面积的碳纳米管作为氨气敏感材料,推导了通过测量射频接收功率变化实现无源检测的数学模型;考虑谐振频率的动态调整,无源RFID传感标签采用开口间隙可调的裂环谐振器结构,通过分析传输系数的变化对RFID传感标签的检测过程进行模拟;搭建了用于实验室和畜禽场景氨气检测的射频测试系统,围绕功率反射系数、谐振频率、传输系数开展测试分析。试验结果表明,该标签检测效率易受到到二氧化碳、温湿度因素的影响,由于人工切割、基板变形、环境干扰等因素,实物标签的谐振频率与2.4 GHz的仿真谐振频率之间存在0.05 GHz左右的偏差,传感标签的灵敏度约为15 MHz·L/mg,最大阅读距离为24 cm,相比于商用氨气传感器,该传感标签在使用寿命、响应时间方面有明显优势。研究结果为畜禽场景的氨气无源检测提供了有效的理论和实践依据。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(Radio Frequency Identification,RFID)传感技术可实现多个用户的同时低功耗无线呼吸监测,在可穿戴智慧医疗健康领域倍受关注。在概述各种呼吸监测技术基础上,重点回顾了采用柔性RFID传感技术,特别是纺织基柔性传感器监测呼吸的基本原理和相关研究现状,比较分析了不同RFID传感方法用于呼吸监测的优缺点,最后提出了在呼吸监测领域应用纺织基RFID传感技术时面临的主要挑战和研究方向。
文摘设计一种基于RFID和传感器技术的推土机状态监测与故障诊断系统,以提高推土机在建筑和工程领域的性能、安全性和可靠性。系统采用射频识别(Radio Frequency Identification,RFID)技术和传感器技术,实时监测推土机的关键参数,如油温、发动机转速、冷却水温度、油压等,以及液位和发动机计时。通过无线传感器网络将数据传输到协调器节点,再发送到远程管理中心进行分析和诊断。
文摘氨气是畜禽场景中的主要有害气体之一,针对有源传感器不适于电路有线连接受限的畜禽场景问题,该研究基于高频电磁仿真软件(high frequency structure simulator,HFSS)设计了无源传感器仿真模型,选择聚酰亚胺(polyimide,PI)作为基板材料,采用丝网印刷技术研制了基于射频识别(radio frequency identification,RFID)原理的无源氨气传感标签。通过对氨气无源检测原理的解析,选择了具有高表面积的碳纳米管作为氨气敏感材料,推导了通过测量射频接收功率变化实现无源检测的数学模型;考虑谐振频率的动态调整,无源RFID传感标签采用开口间隙可调的裂环谐振器结构,通过分析传输系数的变化对RFID传感标签的检测过程进行模拟;搭建了用于实验室和畜禽场景氨气检测的射频测试系统,围绕功率反射系数、谐振频率、传输系数开展测试分析。试验结果表明,该标签检测效率易受到到二氧化碳、温湿度因素的影响,由于人工切割、基板变形、环境干扰等因素,实物标签的谐振频率与2.4 GHz的仿真谐振频率之间存在0.05 GHz左右的偏差,传感标签的灵敏度约为15 MHz·L/mg,最大阅读距离为24 cm,相比于商用氨气传感器,该传感标签在使用寿命、响应时间方面有明显优势。研究结果为畜禽场景的氨气无源检测提供了有效的理论和实践依据。
文摘电力设备数字孪生技术的发展推动了各类新型传感技术在电力行业中的应用,并亟需一条稳定、明确的数据上云渠道,以供给电力设备孪生体进行更加深入的状态分析及故障预测。为此,研制了一种带有金属反射板的双天线射频识别(radio frequency identification,RFID)加速度与温度传感器,并设计了RFID传感系统内的数据包格式以及传感数据经由边缘网关通过4G网络以消息队列遥测传输(messagequeuingtelemetrytransport,MQTT)协议上传至物联网云平台的数据传输通道,然后以OFPSZ-150000/220变压器为例进行了传感器测试和数据传输协议的应用。结果表明:所设计的数据传输协议丢包率主要存在于RFID传感器信道内,在2 m内的丢包率为11.3%,在最远通信距离3 m处的丢包率为38.2%,在数据经由边缘网关上云的信道中几乎不存在数据包的丢失问题。研究表明所设计的RFID传感器具有一定的实用性,且数据通信协议通道是稳定可靠的。
