智能端子箱防凝露控制器的研制与试验研究

提出了一种智能型户外端子箱防凝露控制方法,通过同时采集箱内、外温湿度信息,将两组信息进行智能处理,得出加热器和排风扇的控制条件判定,达到端子箱主动防凝露的目的。研制出了整套智能防凝露试验装置,并在多个变电站进行了长时间的现场试验,获得了良好的效果。与传统的加热除湿装置比较,本装置直接控制箱内露点条件,具备良好温湿度控制曲线和平稳的控制性能;采用低功率远红外加热器配合小排量风扇的控制方式替代目前普遍使用的单一电加热器,除湿快,箱内温升小,加热时间短,节能效果非常显著。     

超声无损检测中探头姿态的控制方案

针对航空航天领域的复杂曲面的复合材料的检测需求,设计一套5轴联动的检测装置,根据Denavit-Hartenberg(D-H)方法推导出模型的运动学方程,然后利用Rhino软件获取物体表面各离散点的坐标及法向量信息,最终根据运动学方程的逆解控制检测装置各关节的移动量,实现复杂曲面扫查。     

基于并行计算的电能计量装置故障诊断技术研究

针对当前电能计量装置故障诊断技术的计算量较大,导致电能计量装置故障诊断效率与诊断准确率较低,提出来一种基于并行计算的电能计量装置故障诊断技术。利用信息聚类技术对电能计量装置信息采样,通过阈值法对数据预处理,去除冗余数据,并建立判别函数,采用并行计算方法处理故障数据,同时执行多个故障数据处理指令,通过判别函数判断故障发生概率并将同类故障数据聚集到一起,以此实现电能计量装置故障诊断。实验结果表明,文章研究的方法使电能计量装置故障诊断效率与准确率较大提升,并在17 MB与1024 MB数据量下,文章所研究的技术方法均能够在较短时间内完成故障诊断。     

基于时间序列分析的侧信道攻击

密码设备在进行加解密时会产生大量的物理信息,如电磁、能耗、热量等。攻击者利用这些物理信息对密码设备进行侧信道攻击,窃取密码设备的密钥。就传统的椭圆曲线加密算法简单能量分析攻击而言,攻击者通过人工识别倍点计算能耗数据中的相似模块,从而恢复出密钥。这种攻击方式导致攻击效率低,准确率不高。本文基于时间序列的模体发现提出了SPAMD算法,该算法实现了倍点计算的能耗数据中相似模块的自动识别,完成了攻击方式从人工识别到自动识别的转换。实验结果表明SPAMD攻击在效率和准确率上有了显著的提升。     

电力系统中采集终端智能报警装置的研制与应用

因用电信息采集终端催费报警提示音量小或无语音提示,许多用户无法及时了解剩余电量信息,未能及时购电,造成用电信息采集终端自动跳闸,严重影响了用电客户正常生产经营活动。基于采集终端无语音提示报警功能或报警音量小等原因易引发供电单位和用电客户之间的矛盾,开发研制了采集终端智能报警装置。该装置由中央处理单元、电源处理单元、操作指示单元等核心结构组成。利用各组件间的运算和协同执行能力,完成装置的报警任务,使用户及时了解剩余电量信息。该装置的成功研制为采集设备的配套安装使用提供了新的选择方向。     

Rapid diagnostics of ASIC circuit marginalities using dynamic laser stimulation

The silicon debug process is increasingly important in producing profitable ICs, but faces increasing challenges. In this paper, the authors report the use of a powerful optical probing technique, dynamic laser stimulation (DLS), to rapidly localize marginal circuits that were causing yield loss on two high-performance ASIC chips. The probing results were obtained without detailed information about the circuits in question and without requiring automated test equipment (ATE) for the device stimulation.     

车间设备监控系统的设计与开发

及时准确地获取车间生产设备数据是企业充分利用信息资源、提高管理水平和走向信息化道路的一个重要方面。本系统采用以太网建立车间局域网以及B／S网络结构体系构建管理系统,数据采集层使用代理机制,实现数据分布式采集和车间设备分布式管理,克服了信息传输不可靠、处理不及时,设备分散难监控等困难,避免了外部网络可能造成的不安全因素,并在实践中得以验证。     

发电机转子温度的射频检测装置

介绍了一种基于射频(RF)技术的发电机转子温度检测装置。利用RF的无线通讯功能,很好地解决了电机转子温度检测中旋转状态下信号的传输问题。对检测装置的元器件选择、硬件电路设计、软件设计等作了详细说明。针对电机结构的特点和检测设备的特殊工作环境,提出了该设备的安装方法。通过试验证明了该装置在转子温度检测中的可行性。     

智能电网中智能后台的功能实现

基于IEC61850通信标准化基础上的智能电网具有信息充分共享、通信系统可靠并实时交互设备完整信息的优点,基于这一点,本文展望了智能电网中后台的智能发展方向,即将GPS对时、故障录波、备自投、小电流接地选线、VQC等辅助设备以逻辑功能模块程序软件形式嵌入后台系统中,建立站内全景数据的统一信息平台,从而实现了变电站的集约化管理,降低电网生命周期成本,提高运行可靠性,为智能电网整体决策提供坚实的基础。     

发电机转子温度的射频检测装置

介绍了一种基于射频（RF）技术的发电机转子温度检测装置。利用RF的无线通讯功能，很好地解决了电机转子温度检测中旋转状态下信号的传输问题。对检测装置的元器件选择、硬件电路设计、软件设计等作了详细说明。针对电机结构的特点和检测设备的特殊工作环境，提出了该设备的安装方法。通过试验证明了该装置在转子温度检测中的可行性。     

基于PLO的电力系统动态模拟实验装置的设计

在介绍基于可编程逻辑控制器（programmable logic controller,PLC）的电力系统动态模拟实验装置的软、硬件设计及其工作原理的基础上,着重介绍了装置的控制核心——利用PLC自带的PID运算模块将调速器、励磁器集成到PLC内部．以提高装置的集成度和可靠性。设计中采用触摸屏与PLC通信,在线传递实验装置的有关信息和数据,实现触摸屏对实验装置的实时监控。     

新型变电站综合测控装置优化设计

结合特高压电网、数字化变电站的建设,研究变电站自动化系统测控技术,并对测控装置进行优化设计.在变电站信息采集源头进行信息的整合和标准化,使其得到更有效的利用.结合IEC 61850标准中通用面向对象的变电站事件(GOOSE)机制和其他一些新技术,实现过程层网络化信息传输,推动变电站的数字化建设.     

基于STM32分布控制的级联H桥STATCOM设计

针对目前级联H桥STATCOM存在的结构的冗余度较低;采用IGBT时成本较高;控制系统与触发系统的电源较为复杂;系统信息传递由于隔离的需要,必须选用光纤通信,研究并设计了一款基于STM32分布控制的级联H桥STATCOM装置。文中介绍了该装置基本拓扑结构与控制系统的实现原理;采用低次谐波最小法原则计算出每个H桥中MOSFET的开通关断时间,实现拟合正弦波输出。分布控制部分由STM32系列芯片作为控制芯片,控制各H桥的触发、信息采集并将信息传递给作为主机的DSP芯片;在EMTP电力系统电磁暂态分析仿真软件中搭建了12H桥级联的仿真模型,仿真结果表明了设计的正确性和可靠性。另外,还设计了12H桥级联STATCOM的实验装置,该装置实现了设计功能,验证了文章内容的可行性。     

变电站端子箱防潮控温系统的研制

研制了一套变电站端子箱防潮控温系统。系统由无线温湿度调节控制器、手持设备和监控平台构成。控制器通过Zig Bee无线网络与监控平台交互信息;手持设备通过红外射线读写控制器参数。提出了新的防凝露控制方案,研制了半导体制冷除湿装置;结合模糊PID技术,运用半导体制冷除湿,防潮效果明显;利用手持设备方便运维人员现场巡检;通过平台实现站内各端子箱的集中监控。论述了系统的软硬件设计,重点讨论无线温湿度调节控制器的设计方案。目前,本套系统已在多个变电站内投入使用,具有较好的实用性。     

A sensorized thumb for force closed-loop control of hand neuroprostheses

In this paper, we presented a sensorized thumb based on a matrix of piezoresistive force sensors, with an acquisition unit and a special wearing support. The sensor was calibrated and then the device was tested during different tasks simulating activities of daily living performed by seven able-bodied subjects. By means of these experiments, we verified that the device proposed can be used to extract force information during grasp. In fact, the device was able to provide useful force information in the 98% of the trials with a good repeatability during all the different conditions. Moreover, we evaluated the patterns obtained during the different grasping tasks. The palmar grasps were performed in a similar manner, whereas the lateral pinch and the spherical volar grip were more different. This device can provide force information with good performance and acceptability and it can be used for force closed-loop control of hand neuroprostheses.     

利用远程技术加强信息系统设备的运行管理

结合岳阳电业局信息系统设备的运行情况,利用SNMP及第3方软件对信息系统设备进行远程监控和故障告警,以提高对设备运行的管理效率,保证设备的稳定运行。     

Using biofeedback for standing-steadiness, weight-bearing training

A device to help improve balance and postural control is presented. Imbalance and falls are the leading causes of injury in older adults, and the leading causes of accidental death in those over age 85. Furthermore, the increase of age-related diseases such as neuromuscular dysfunction rely heavily on rehabilitation therapy. The effectiveness of the therapy depends of the skill of therapist and the functions of the therapeutic devices used. The results of this study demonstrated that the newly designed standing-training device with weight-bearing biofeedback offers better training for hemiplegia patients than does conventional training devices. The advantages of this new training device are as follows: (1) simple hardware configuration with low construction cost makes its use practical both in the hospital setting and in a home-care environment; (2) visual and auditory feedback of weight-bearing information gives the patient the means for self-postural compensation, with correspondingly less intervention by a therapist; (3) integrating balance training with real-time quantitative and graphical illuminating signals makes training more enjoyable for the patient; (4) biofeedback components for lower and upper extremities (i.e., weight-bearing measuring platform and posture correction mirror) can be decoupled and used in different training programs     

Anticipation of digital patterns

A memristive device is a novel passive device, which is essentially a resistor with memory. This device can be used for novel technical applications like neuromorphic computation. In this paper, we focus on anticipation—a capability of a system to decide how to react in an environment by predicting future states. Especially, we have designed an elementary memristive circuit for the anticipation of digital patterns, where this circuit is based on the capability of an amoeba to anticipate periodically occurring unipolar pulses. The resulting circuit has been verified by digital simulations and has been realized in hardware as well. For the practical realization, we have used an Ag‐doped TiO_2?x‐based memristive device, which has been fabricated in planar capacitor structures on a silicon wafer. The functionality of the circuit is shown by simulations and measurements. Finally, the anticipation of information is demonstrated by using images, where the robustness of this anticipatory circuit against noise and faulty intermediate information is visualized.     

Optimizing assisted communication devices for Children with motor impairments using a model of information rate and channel capacity.

For children who depend on devices to communicate, the rate of communication is a primary determinant of success. For children with motor impairments, the rate of communication may be limited by inability to contact buttons or cells rapidly or accurately. It is, therefore, essential to know how to adjust the device interface in order to maximize each child's rate of communication. The optimal rate of communication is determined by the channel capacity, which is the maximum value of the information rate for all possible keyboard button or cell layouts for the communication device. We construct a mathematical model for the information rate based on the relationship between movement time and the number of buttons per screen, the size of the buttons, and the length of a sequence of buttons that must be pressed to communicate each word in the vocabulary. We measure the parameters of the model using a custom-programmed touchscreen interface in 10 children with disorders of arm movement due to cerebral palsy who use a DynaVox communication device. We measure the same parameters in 20 healthy control subjects. We show that the model approximates the measured information rate and that the information rate is lower in children with motor impairments compared with control subjects. The theory predicts that for each child there is a combination of button size and number that maximizes the predicted information rate and thereby achieves communication at the optimal channel capacity. Programming communication devices with each child's predicted optimal parameters improved the communication rate in five of the ten children, compared with programming by professionals. Therefore, measurement of information rate may provide an assessment of the effect of motor disorders on success in assisted communication. Optimization of the information rate may be useful for programming assisted communication devices.     

Ferroelectric Thin Films-Based Technology for Frequency- and Phase-Agile Microwave Communication Applications

This paper deals with the current status of thin film ferroelectric-based frequency and phase agile microwave devices for communication applications. Researchers around the world have been active in this area for several years, and their results have been very relevant in determining the advantages and limitations of this technology when contrast with technology currently in use. The aforementioned results will be discussed in terms of device parameters such as RF losses, tunability, phase shift, frequency of operation, ease of fabrication, and projected cost, amongst others. Although the presentation will emphasize a NASA perspective, the information provided should offer a perspective of the attributes of this technology for other government agencies' electronically steerable electronics requirements, and for commercial communication applications.