基于自然接触传感器的智能控制手柄

研究开发了一种用于控制手柄的自然接触传感器组.该传感器组能够实时地测量皮肤血流容积、皮肤导电性、皮肤温度和握力等人体生理信号,同时不会改变和打扰人原来的工作状态.传感器的设计是基于自然接触理念,通过包覆的方式安置到控制手柄上,以保证人和传感器的自然接触,包覆有此类传感器的手柄称为智能控制手柄,实验结果显示智能控制手柄具...     

基于分布式控制的航空发动机智能温度传感器

提出了一种基于分布式控制,用AD595和TMS320LF2407ADSP构成的航空发动机智能温度传感器。设计了热电偶测温电路、报警电路、显示电路接口并讨论了分布式控制的总线选择。用切比雪夫分段拟合的方法进行了热电偶的非线性校正。实验结果表明,该智能温度传感器结构简单、能够实时报警、准确度较高(相对误差小于1%),适用于航空发动机分布式控制系统。     

嵌入DeviceNet总线接口的智能差压传感器系统

介绍了一种具有DeviceNet现场总线通信功能的智能差压传感器的设计,探讨了传感器输入输出特性曲线的非线性校正方法。通过内嵌的总线控制器(SJA1000)、报文收发器(82C251)和P89C668单片机等,该传感器可直接作为一个DeviceNet从节点工作;对传感器的输入输出特性曲线进行了建模,以软件手段实现高精度的非线性自校正功能。测试结果表明:该智能差压传感器不但具有DeviceNet现场总线输出功能,且经过多项式或神经网络建模的传感器非线性误差分别可达0.04%FS和0.02%FS。这为高精度传感器的制作提供了一种可行的方法。     

智能遥控器中的MEMS惯性传感器数据处理

阐述了MEMS加速度计/陀螺仪传感器数据的动作检测、偏移量更新、校准、传感器数据融合等处理技术在智能遥控系统中的应用。     

Cross-community context management in Cooperating Smart Spaces

Recently, social networks have become the most prevalent IT paradigm, as the vast majority of Internet users maintain one or multiple social networking accounts. These accounts, irrespectively of the underlying service, contain rich information and data for the owner’s preferences, social skills, everyday activities, beliefs and interests. Along with these services, the computation, sensing and networking capabilities of the state of the art mobile and portable devices, with their always-on mode, assist users in their everyday lives. Thus, the integration of social networking services with current pervasive computing systems could provide the users with the potential to interact with other users that have similar interests, preferences and expectations; and in general, the same or similar context, for limited or not time periods, in order to ameliorate their overall experience, communicate, socialise and improve their everyday activities with minimal effort. This paper introduces a cross-community context management framework that is suitable for Cooperating Smart Spaces, which couple the advantages of pervasive computing and social networking. This framework goes beyond the state of the art, among others, in that cross-community context from a multitude of sources is collected and processed to enhance the end user experience and increase the perceived value of the services provided.     

Smart remote-controller designed with combining speech-recognition microprocessor and wireless sensor networks

Microsystem Technologies - The objective of this study was to design a smart remote-controller combining with speech-recognition and self-learning function Module and blue-tooth wireless sensor...     

Smart motion detection sensor based on video processing using self-organizing maps

Most current approaches to computer vision are based on expensive, high performance hardware to meet the heavy computational requirements of the employed algorithms. These system architectures are severely limited in their practical application due to financial and technical limitations. In this work a different strategy is used, namely the development of an inexpensive and easy to deploy computer vision system for motion detection. This is achieved by three means. First of all, an affordable and flexible hardware platform is employed. Secondly, the motion detection algorithm is specifically tailored to involve a very small computational load. Thirdly, a fixed point programming paradigm is followed in implementing the system so as to further reduce the computational requirements. The proposed system is experimentally compared to the standard motion detector for a wide range of benchmark videos. The reported results indicate that our proposal attains substantially better performance, while it remains affordable and easy to install in practice.     

基于分布式控制的航空发动机智能转速传感器

依据航空发动机转速测量原理,提出并设计了一种基于分布式控制的智能转速传感器.分析了转速测量原理和软件采集实现流程,设计了传感器信号组合倍频调理电路与部分数字信号处理器(DSP)外围接口电路,编写了汇编程序.试验结果表明:该智能传感器测量精度高,误差小于0.02%,处理速度快,适用于航空发动机分布式控制试验研究.     

探空温度传感器的太阳辐射误差研究

伴随着数值天气预报和气候变化研究精细化程度的不断提高,希望探空温度传感器的观测精度达到0.1 K数量级。为了实现此目标,运用计算流体动力学(CFD)方法对珠状热敏电阻器从海平面上升至32 km高空的整个过程进行太阳辐射误差数值分析。在此基础上,针对影响测温精度的引线、引线夹角大小以及太阳照射角度进行分析与探讨,获得其与太阳辐射误差的内在联系。数值求解结果表明:引线、引线夹角大小以及太阳照射角度是太阳辐射误差的重要影响因子。海拔高度与太阳辐射误差之间呈现出随海拔高度的增加斜率不断增大的类指数函数关系。     

智能化通信网络综合管理系统浅析

首先对智能化网络管理技术相关的现状和趋势进行了分析;接着介绍结合了基于策略的网络管理技术、基于规则的告警关联分析技术、基于工作流的过程控制技术实现的智能化综合网络管理系统原型系统。     

Dynamic power management in wireless sensor networks

We propose an OS-directed power management technique to improve the energy efficiency of sensor nodes. Dynamic power management (DPM) is an effective tool in reducing system power consumption without significantly degrading performance. The basic idea is to shut down devices when not needed and wake them up when necessary. DPM, in general, is not a trivial problem. If the energy and performance overheads in sleep-state transition were negligible, then a simple greedy algorithm that makes the system enter the deepest sleep state when idling would be perfect. However, in reality, sleep-state transitioning has the overhead of storing processor state and turning off power. Waking up also takes a finite amount of time. Therefore, implementing the correct policy for sleep-state transitioning is critical for DPM success. It is argued that power-aware methodology uses an embedded microoperating system to reduce node energy consumption by exploiting both sleep state and active power management     

一种无线传感器网络的密钥管理机制

介绍了一种用于无线传感器网络(WSNs)的密钥预分配机制:多密钥空间哈希随机密钥预分配(HARPMS)机制。该机制针对group-based节点投放模型,将密钥空间划分成多个子空间,在密钥分配和建立时使用Hash链技术,以提高网络的抗节点俘获能力。分析表明:相比传统的用于group-based投放模型的随机密钥预分配机制,HARPMS获得了同等的连通性,但却有更好的抗节点俘获能力。     

无线传感器网络信誉管理机制

无线传感器网络信誉管理作为保护网络安全、提高网络可用性的一种手段,被广泛应用在生产生活中。介绍了传统的无线传感器网络信誉管理机制,在其基础上加以改进,提出加入能量因素和环境误差因素,以提高无线传感器信誉值测量的准确性。     

Crisis management using MAS-based wireless sensor networks

Wireless communication is increasingly used to manage large-scale crises (e.g., natural disasters or a large-scale city fire). Communication has traditionally been based on cellular networks. However, real-life experience has proven that the base stations of these networks may collapse or become unreachable during a crisis. An incident commander must also know as much information as possible about the occurring events to control them quickly and efficiently. This paper thus proposes a crisis management approach that overcomes the problems encountered by the base stations and insures relevant, rich and real-time information about events. This approach is based on wireless sensor networks, which are distributed in nature with no need for infrastructure and could be deployed in dangerous and inaccessible zones to gather information. Our proposal uses a multi-agent system as a software layer. The multi-agent system aims to improve the wireless sensor network performance by allowing cooperation between sensor nodes, offering better lifetime management and virtualizing the application layer. This virtualization supports several required applications simultaneously, including event monitoring and object tracking. Through successive simulations, we prove the importance of our approach in crisis management using several criteria to estimate the position’s error in object tracking, end-to-end delay and wireless sensor network lifetime management.     

Intelligent management of distributed dynamic sensor networks

A universal solution for the management of dynamic sensor networks will be presented, covering both networking and application layers. A network of intelligent modules, overlaying the sensor network, collectively interprets mission scenarios in a special high-level language, which can start from any nodes and cover the network at runtime. The spreading scenarios are extremely compact, which may be useful for energy-saving communications. The code will be exhibited for distributed collection and fusion of sensor data, and also for tracking mobile targets by scattered and communicating sensors. This work was presented in part at the 12th International Symposium on Artificial Life and Robotics, Oita, Japan, January 25–27, 2007     

无线传感器网络动态功率管理方法

为了最大限度节约能源的使用,使无线传感器网络使用寿命延长,提出了利用小波和Kalm an滤波的一种动态功率管理方法。该方法通过使用小波、Kalm an和AR对下一事件到达时间的预测来决定传感器进入何种的功率状态,使得在尽可能低的事件丢失率下减少传感器总体能量损耗。仿真实验结果表明:这种方法是有效的。     

Smart Sankey picturization for energy management systems in India

AI & SOCIETY - India’s energy demand is predicted to rise by 135% within a span of 20 years. Coping up with surging energy demands requires several reforms in both renewable and...     

工业用热辐射型光纤高温传感器的研究

在分析热辐射测温和光辐射与传输理论的基础上,采用“接触-非接触式”测温原理,研制成功了工业用热辐射型光纤高温传感器。它通过现场校准和工艺控制温度的方法,避开了确定辐射系数的难题。实验结果表明:该传感器可应用于指导批量生产,大大降低生产成本。