In inertial navigation system,gyro is used to measure the angular velocity of carrier relative to inertial space for achieve attitude matrix updated in real time.Gyro difficult to eliminate the error,results in strapdown inertial navigation system precision decrease with time.Star sensor is a high-precision attitude measuring instrument and don't require any priori information,the attitude date can be provided by star sensor.Thus,gyro is simulated by star sensor in order to improve the precision of strapdown inertial navigation system.

关键词：星敏感器；陀螺仪；捷联式惯性导航系统；角速度

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Wireless sensor networks require energy-efficient and robust routingprotocols.Most routing protocols for sensor networks try to extendnetwork lifetime by minimizing the energy consumption,but have not taken the network reliability into account.In this paper,we analyze the fault models and propose an ENergy-aware FAult-tolerantRouting scheme,termed as ENFAR.Firstly a link-based uniform fault model is presented,and we adopt a cross-layer design to measurethe transmission delay so as to detect the failed nodes.

关键词：传感器网络；容错；能量感知；跨层

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In this paper, the energy consumption of Hidden field equation (HFE) multivariate scheme in wireless sensor networks (WSN) has been evaluated. Security provisioning in WSN requires balancing between two conflicting goals - security strength and resource efficiency. Most of the cryptosystems with security strength required in a WSN are highly resource intensive. Cryptographic operations consume processor power, time and memory space for storage of intermediate and final output. The cryptographic bits also constitute communication overhead that induces delay and decreases the effective throughput. To lessen the load on the resource constrained WSN without compromising security, HFE multivariate scheme is proposed. HFE is a multivariate cryptosystems in which linear equations are solved to obtain successive sets of central variables. The small number of operations and limited memory requirements make this scheme a potential candidate for security provisioning in WSN. Analysis and simulation results show that the scheme can be implemented on resource constrained sensor nodes. Moreover, the decrease in throughput and increase in delay due to HFE scheme are within the tolerable limits of WSN applications.

关键词：无线传感器网络；多元；椭圆曲线密码；HFE方案

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The objective of environmental observation with wireless sensor networks is to extract the synoptic structures of the phenomena of region of interest (ROI) in order to make effective predictive and analytical characterizations.Adaptive sampling strategy is regarded as a much promising method for improving energy efficiency in recent years.However,due to distributed characteristics of wireless sensor networks,adaptive sampling schemes should be operated in a distributed manner with clustering algorithm.In this paper,we dedicate to investigating appropriate sensing-aware clustering .algorithm for adaptive sampling.The principle of SAC algorithm follows such metric: sensor nodes ～i～at are similar to each other in terms of their observed sensory data should be clustered into one group.Besides,sensor nodes will join in its nearest cluster for the sake of spatial correlation model with Euclidean physical distance.By emphasizing on the sensing-aware clustering,it helps to derive better spatial correlation to guarantee adaptive sampling.The simulation results verify SAC algorithm at the aspect of correlation factor.

关键词：传感器；自适应采样；传感感知聚类；能源有效

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Quantification and evaluation of palpation is a growing field of research in medicine and engineering. A newly developed tri-axial touch sensor has been designed to capture a multi-dimensional profile of touch-loaded forces. We have developed a data visualization tool as a first step in simplifying interpretation of touch for assessing hands-on clinical performance.

关键词：传感器；临床乳房检查；触觉；数据可视化

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Magneto-elastic cable tension sensor have a number of advantages,it will be ideal method to measure cable tension in large span cable-bridge,but the sensor is sensitive to temperature,so the temperature influence is not negligible to sensor.In this paper,the principle of cable tension sensor based on magnetic-elastic effect is introduced,the common temperature compensation technique are detail analyzed.A novel method of temperature compensation by adjusting the bias magnetic field is put forward,by theoretical analysis and experiment,indicated that it is feasible to compensated the temperature influence.

关键词：传感器；磁弹性效应；温度补偿；偏置磁场

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One important issue in sensor networks that has received renewed interest recently is average consensus, i.e., computing the average of n sensor measurements, where nodes iteratively exchange data with their neighbors and update their own data accordingly until reaching convergence to the right parameters estimate. In this paper, we introduce an efficient self-stabilizing algorithm to achieve/ensure the convergence of node states to the average of the initial measurements of the network. We prove that the convergence of the fusion process is finite and express an upper bound of the actual number of moves/iterations required by the algorithm. This means that our algorithm is guaranteed to reach a stable situation where no load will be sent from one sensor node to another. We also prove that the load difference between any two sensor nodes in the network is withinε/D ×[D+1/2] <ε, where e is the prescribed global equilibrium threshold (this threshold is given by the system) and D is the diameter of the network.

关键词：分布式传感器网络；算法；融合

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In this paper an electronic voltage-current voltage transformer (EVCVT) scheme has been proposed based on voltage-current transformation,using the voltage-current transformation technology and weak current detection technology to achieve the accurate measurement of the grid voltage.It transforms the high voltage into low current by high voltage thick film resistor,then the current sensor transforms the low current signal into a standard analog voltage signal,thus an AD converter collects the voltage signal,and the value be imported into the microprocessor for filtration,calibration,coding.After filtering the data would be transmitted to the upper computer or relay protection devices of the digital substation.This paper focused on the design of hardware circuit of digital voltage transformer,developed the software package and produced a prototype control board.Initial experiments show that the scheme is valuable for digital substation.

关键词：电压互感器;；周电流传感器；电压 - 电流转换；周电流检测

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Soil humidity is considered as one of important soil parameters and is already used widely in agriculture information system.The measurement of the soil humidity,characterized by accuracy and continuity,can help build useful information systems for modem agriculture.Remote detection of soil humidity can be achieved easily by using wireless sensors network (WSN).In this paper,a way to build an automatic irrigating system taking advantage of humidity measurements,which is obtained based on Wireless Sensor Network,is proposed.That how the humidity is detected and how the WSN is constructed is discussed.Furthermore,the connection of hardware devices and theprograms of software is described.

关键词：无线传感器网络；农业；自动灌溉；土壤湿度

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A micro inductance sensor model based on the software of Maxwell to detect the debris in oil is presented.The model is built to study the detecting performance of sensors with different turns and enwinding styles.It can be demonstrated that the planar coil with 15 turns has a better sensitivity to detecting metal debris with about 100 micro meters in size.The solenoid coil with 20 turns has a better performance to detect the micro metal debris.This simulation shows that the detecting performance of a sensor is related to its parameters such as the size,turns,style of enwinding.The optimization of coils for the detection of metal debris with 100 μm in size is presented at last.

关键词：传感器；微型电感线圈；金属碎片；碎片检测

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