基于Bayes估计的多传感器数据融合方法研究

对多传感器数据融合方法进行研究 ,以 Bayes估计理论为基础得到了多传感器最优融合数据 ,并将它与其它方法得到的融合数据进行了比较 .     

无线抄表系统脉冲采集模块的应用设计

针对我国目前电能数据采集方法不便的这一现状,提出并实现了以ATmega162单片机作为无线抄表系统脉冲主处理器的设计。     

无线传感器网络MAC协议的节能机制研究

由于无线传感器网络节点使用干电池和纽扣电池供电的特点,限制了网络节点能量的使用。而传感器网络中能量的控制主要由MAC层和路由层完成,MAC层相对于路由层对能量的控制更为直接和频繁。文章分析了传感器网络的MAC协议中能量消耗的各种原因,并针对各种原因提出了相应的解决办法,可以较好地延长网络的使用寿命。     

无线传感器网络中簇树骨干网的维护和更新算法

无线Adhoc传感器网络中的路由设计将能效高放在首位,设计用于路由基础的高效能簇树骨干网是延长网络寿命很有效的方法.文中利用图论中极大权独立集和根树的概念给出一种求簇树骨干网的EACT算法及对该骨干网的维护和更新算法.并通过仿真结果表明算法的有效性.     

湿腐蚀法制备U形塑料光纤折射率传感器

为提升折射率测量灵敏度、方便测量,通过湿腐蚀法制备了高灵敏度的U形塑料光纤折射率传感器.从理论上分析了多模塑料光纤宏弯曲折射率传感器的原理,利用射线法对塑料光纤中传输光场进行近似,获得多模塑料光纤宏弯曲模式损耗的表达式.采用丙酮和甲醇混合溶液作为腐蚀剂,利用湿腐蚀法对塑料光纤进行处理,观察不同腐蚀剂浓度腐蚀后光纤表面形...     

镍(Ⅱ)四磺酸基酞菁修饰玻碳电极制备一氧化氮传感器

用电沉积法将镍(Ⅱ)四磺酸基酞菁(NiTSPc)修饰在玻碳电极表面,又用浸蘸法将Nafion修饰在该电极表面,制备出一种新型一氧化氮电化学传感器,并研究了它们对缓冲溶液(PBS)中一氧化氮(NO)和亚硝酸盐(NO2-)的电化学行为.实验结果表明,NiTSPc和Nafion修饰材料对一氧化氮分子的电化学氧化具有显著的促进作用,在c(NO)为0.2~8μmol/L的区间内,用NiTSPc和Nafion修饰的传感器的DPA电流值与c(NO)成良好线性关系,且灵敏度高,选择性良好,可用于NO实时检测.     

石油套管射孔检测传感器的研制

通过介绍磁通法检测石油井套管射孔质量的基本原理, 研究了磁检测传感器的结构及其环境适应性, 在实验室模拟井中对套管的射孔进行了检测, 给出了具体的检测结果.     

Efficient and power-awareness query over sensor networks

Sensor networks consisted of low-cost, low-power, muhifunctional miniature sensor devices have played an important role in our daily life. Light and humidity monitoring, seismic and animal activity detection, environment and habitat monitoring are the most common applications. However, due to the limited power supply, ordinary query methods and algorithms can not be applied on sensor networks. Queries over sensor networks should be power-aware to guarantee the maximum power savings. The minimal power consumption by avoiding the expensive communication of the redundant sensor nodes is concentrated on. A lot of work have been done to reduce the participated nodes, but none of them have considered the overlapping minimum bounded rectangle （MBR） of sensors which make them impossible to reach the optimization solution. The proposed OMSI-tree and OMR algorithm can efficiently solve this problem by executing a given query only on the sensors involved. Experiments show that there is an obvious improvement compared with TinyDB and other spatial index, adopting the proposed schema and algorithm.     

分布式声传感器井中背景噪声统计特性分析

分布式声传感器技术(DAS: Distributed Acoustic Sensor)是一种新近提出的高精度勘探数据采集方法,受制于复杂背景噪声的影响,DAS记录处理水平有待进一步提高.针对上述问题,采用基于替代序列的时间序列平稳性检验方法和Lilliefors检验法对DAS记录中复杂背景噪声的平稳性和高斯性进行研究....     

A novel fully-integrated miniature six-axis force/torque sensor

This paper presents a new designed miniature six DOF （degree of freedom） force/torque sensor. This sensor is fully integrated with a micro DSP （digital signal processor）, so all the signal conditioning, A/D, decoupling, digital-signals serial output are performed in the sensor. Some experimental results are presented to demonstrate the capability of the proposed design. Finally, a neural network was used for decoupling the interacting signals, compared with the conventional method using the inverse matrix, this new method is more accurate.