全光纤电流互感器传感头的设计、制作及封装工艺

商用化的全光纤电流互感器(FOCT)的误差一般要求小于0.2%, 传感头是决定该类传感器测量准确度的关键因素。论述了FOCT的光路结构、工作原理及研制难点, 分析了传感头对FOCT性能的影响, 并对传感头的设计、制作及封装制作工艺进行了深入研究。通过选择合适的材料和工艺方法, 可避免各种负面效应对FOCT的不利影响, 获得具备优异的环境适应性、可靠性和稳定性的传感头, 试验结果表明, 通过该方法实际制作出的传感头提高了FOCT的性能, 使其满足了0.2 S级测量用电子式电流互感器的准确度要求。     

Design and implementation of a five-hp, switched reluctance,fuel-lube, pump motor drive for a gas turbine engine

A new switched reluctance (SR) fuel/lube (F/L) pump system has been developed for a gas turbine engine application. The system is rated at 5 HP, 270 V DC, 12.5 krpm maximum operating speed, and consists of a SR machine mounted on the F/L pump shaft, an inverter, and an electronic controller. This paper focuses on the design, implementation, and performance of the system. The system can use one of two methods for rotor position sensing, either a resolver or electronic position sensing (EPS). The F/L pump system has undergone extensive performance testing with the resolver. Testing is underway using electronic position sensing. Test results are given to validate the system design and compare the performance using both approaches to position sensing. System efficiency is about 82 percent at full load     

纳米金在光学和电化学传感器中的应用

纳米金材料有着特殊的表面效应、量子尺寸效应和宏观量子隧道效应,在电学、磁学、光学和化学性质方面具有常规材料不具备的优越性能.综述了纳米金的制作方法,以及纳米金光学方法和电化学方法应用于生物检测和各种气体、液体检测等方面的研究进展.     

一个新型的大检测电容结构的MEMS惯性传感器研究

A novel MEMS inertial sensor with enhanced sensing capacitors is developed. The designed fabricated process of the sensor is a deep RIE process, which can increase the mass of the seismic to reduce the mechanical noise, and the designed capacitance sensing method is changing the capacitance area, which can reduce the air damping between the sensing capacitor plates and reduce the requirement for the DRIE process precision, and reduce the electronic noise by increasing the sensing voltage to improve the resolution. The design and simulation are also verified by using the FEM tool ANSYS. The simulated results show that the transverse sensitivity of the sensor is approximately equal to zero. Finally, the fabricated process based on silicon-glass bonding and the preliminary test results of the device for testing grid capacitors and the novel inertial sensor are presented. The testing quality factor of the testing device based on the slide-film damping effect is 514, which shows that the enhanced capacitors can reduce mechanical noise. The preliminary testing result of the sensitivity is 0.492pf/g.     

A Skin‐Inspired Integrated Sensor for Synchronous Monitoring of Multiparameter Signals

Electronic skins, as the integration of multiple distinct sensors, have aroused broad interests owing to their great potential in sensing applications. However, problems including the interference between sensing components and the difficulty in synchronous monitoring are practically encountered when they are applied to mixed signals. In this work, efforts are devoted to trouble‐free technical strategies for laminating three sensors with different sensing abilities into a skin‐like electronic device. The use of ionic liquid, combined with particular circuit topologies, ensures the reliable stability against mechanical disturbance during the real‐time sensing tests. The intrinsic layered structure and three independent sensing functions of natural skins are successfully presented by this particular device in which three sensors with the ease of preparation are spatially integrated. The changes of temperature, pressure, and infrared light can be recorded simultaneously yet without mutual signal interference. The perfect integration of multiple functional sensors into a single skin‐like device without any signal interference makes an important progress for pursuing the goal of future electronic skins that can practically be used as skin.     

Electronic retina based vision systems an adequation algorithm-architecture application approach

Electronic retina is a combination between in situ signal processing and image sensing on a same silicon chip. This smart image sensing, realizable in commoncmos technology, is a valuable technique in real-time vision systems. In order optimize the global performance of a vision machine where different levels of processing are needed, this technique can not be considered simply as an intelligent image sensor design problem. Because the local onsensor information processing in an electronic retina should be placed in a more general context including algorithms, architectures and applications. This paper tries to give an overview on the electronic retina based vision systems and especially on the roles that an electronic retina can play in real-time vision systems.     

Self‐Powered Noncontact Electronic Skin for Motion Sensing

The advancement of electronic skin envisions novel multifunctional human machine interfaces. Although motion sensing by detecting contact locations is popular and widely used in state‐of‐the‐art flexible electronics, noncontact localization exerts fascinations with unique interacting experiences. This paper presents a self‐powered noncontact electronic skin capable of detecting the motion of a surface electrified object across the plane parallel to that of the electronic skin based on electrostatic induction and triboelectric effects. The displacement of the object is calculated under the system of polar coordinates, with a resolution of 1.5 mm in the lengthwise direction and 0.76° in the angular direction. It can serve as a human machine interface due to its ability to sense noncontact motions. An additional self‐powered feature, enabled by its physical principles, solves the problem of power supply. This electronic skin consists of trilayers of polyethyleneterephthalate–indium tin oxide–polydimethylsiloxane (PDMS) films, and microstructured PDMS as the electrified layer, which can be achieved through simplified, low cost, and scalable fabrication. Transparency, flexibility, and less number of electrodes enable such electronic skin to be easily integrated into portable electronic devices, such as laptops, smart phones, healthcare devices, etc.     

基于CDMA的电力远程抄表物联网应用

借助电力感知设备和技术实现对用户电力信息数据的采集,并依托CDMA 3G高速数据业务网络,搭建高效的电力远程抄表物联网,能够为电力部门提供及时、准确、直观的电量使用数据和统计状况,实现电力采集数据的实时传送和信息网络的无缝链接,加强了电力部门对电力资源使用的监控和管理能力。     

High-Frequency Fiber Bragg Grating Sensing Interrogation System Using Sagnac-Loop-Based Microwave Photonic Filtering

A novel high-frequency fiber Bragg grating (FBG) sensing interrogation system by using fiber Sagnac-loop-based microwave photonic filtering is proposed and experimentally demonstrated. By adopting the microwave photonic filtering, the wavelength shift of sensing FBG can be converted into amplitude variation of the modulated electronic radio-frequency (RF) signal. In the experiment, the strain applied onto the sensing FBG has been demodulated by measuring the intensity of the recovered RF signal, and by modulating the RF signal with different frequencies, different interrogation sensitivities can be achieved.      

Soft Human–Machine Interface with Triboelectric Patterns and Archimedes Spiral Electrodes for Enhanced Motion Detection

The rapid development of electronic skins has allowed novel multifunctional human–machine interaction interfaces, especially in motion interaction sensors. Although motion sensing is widely used in advanced flexible electronic devices through the integration of single sensing units, the number of electrodes has increased with the increase in integration by the square multiple. This paper presents a self-powered electronic skin based on the Archimedes spiral structure design, which can detect the multi-directional movement of the slider without external energy supply. As the rotation angle of the Archimedes spiral increases from 2π to 4π, the maximum resolvable movement direction of the device increases from 24 to 280, and the number of electrodes is kept at 4. Through the exploration of the principle of triboelectricity, the inherent electronegativity of the triboelectric materials is used as the basis for signal discrimination, which not only increases the reliability of the device, but also solves the problem of energy supply during device operation. A reduced number of electrodes and its battery-free nature enables this electronic skin to be easily integrated into portable electronic devices, such as laptops, smart phones, healthcare devices, etc.     

超短脉冲强激光大气传输的非线性效应

超短脉冲强激光大气传输在光学遥感、电子对抗、以及人工放电等方面具有重要的应用．例如,利用超短脉冲强激光使得远距离处的大气局域电离,其所产生的紫外辐射可以为大气组分主动荧光光谱学研究提供光源。对短脉冲强激光在大气中的传输进行了理论分析,对超短脉冲强激光大气传输中的各种线性效应及非线性效应,诸如色散效应、非线性自聚焦效应、受激拉曼散射效应、多光子电离及隧道电离效应、电离引起的能量损耗效应、相对论聚焦、有质动力激发的等离子体尾波场等效应进行了讨论,给出了一组描述超短脉冲强激光大气传输的三维非线性传输方程,为此类问题的进一步研究提供了理论基础。     

大气波导中基于抛物方程法的障碍物定位

为了解决遥感遥测、自动导航、电子战等领域中常常涉及到障碍物定位问题,在单向抛物方程法的逆算法的基础上提出了双向抛物方程法的逆算法。应用该逆算法对大气波导环境中的障碍物进行了探测和定位,采用插值法分析了大气波导对障碍物定位精确度的影响。仿真结果表明,通过双向抛物方程法的逆算法可以对传播路径上的障碍物进行探测和定位,而且大气折射率变化会对定位精确度产生较大影响。     

基于海岸线的海陆图填充Matlab实现方法

根据近岸及大洋的海洋环境要素的特征及空间分布场的特点选用不同的区域进行客观分析时,需要参考所在的地理位置。为了正确进行海洋环境要素特征提取,本文将介绍Matlab环境下的全球海岸线绘制方法,进行海陆图填充,以中国近海海洋温度图为实例,实现遥感数据可视化的初步处理,为遥感数据进一步几何校正提供参考,实现海洋资料提取智能化、快速化。     

无人机航空遥感平台机载作业控制系统设计

无人机相比较卫星和载人航空飞机遥感平台而言,具有成本低、灵活性高的特点。为了满足科学遥感实验、完成遥感作业任务、协调无人机电子吊舱中多组件工作、控制遥感影像传感器姿态,系统以AT89S52为主控芯片,扩展多路串口及USB接口以实现系统与外围设备的通信,同时设计了相机驱动模块及三自由度步进电机驱动模块。通过无人机航空遥感实验证明该系统能够满足遥感实验要求。     

Fast Charging Circuit for NiCd Battery Used in Implant Electronic Systems

A fast charging circuit for NiCd battery used in implant electronic systems is described. The circuit utilized the techniques of 1) sensing the internal gas pressure and temperature rise by sensing of the battery terminal voltage, and 2) setting the maximum charging current according to the concept of charge retention capacity, >95 percent after 100 cycles, of the battery. Experimental results show that a B-20 cell can be fully charged in 20 minutes instead of 14 hours.     

超短脉冲强激光大气传输的非线性效应

超短脉冲强激光大气传输在光学遥感、电子对抗、以及人工放电等方面具有重要的应用, 例如, 利用超短脉冲强激光使得远距离处的大气局域电离, 其所产生的紫外辐射可以为大气组分主动荧光光谱学研究提供光源。对短脉冲强激光在大气中的传输进行了理论分析, 对超短脉冲强激光大气传输中的各种线性效应及非线性效应, 诸如色散效应、非线性自聚焦效应、受激拉曼散射效应、多光子电离及隧道电离效应、电离引起的能量损耗效应、相对论聚焦、有质动力激发的等离子体尾波场等效应进行了讨论, 给出了一组描述超短脉冲强激光大气传输的三维非线性传输方程, 为此类问题的进一步研究提供了理论基础。     

信息与动态

信息与动态有液晶特性的聚合物网络、弹胶体及胶体近几年，具有液晶特性的各向异性聚合物网络、弹胶体及胶体引起基础科学工作者的兴趣，因为它们有着广阔的应用前景。应用领域有：被动式光学元件，如固体彩色滤光膜、光学延时器、偏振光元件等；主动式电子元件，如液晶显...     

车联网相关感知技术、产品以及案例分析

车辆感知技术是车联网的末梢神经,是车联网最关键的技术。车联网感知技术分为车况及控制系统感知和道路环境感知。介绍了车联网感知系列的电子产品,以及国内外车辆感知技术发展现状。最后介绍了车联网感知技术的应用案例,梅赛德斯—奔驰公司开发的循迹辅助系统。     

Flexible electronic skin with high performance pressure sensing based on PVDF/rGO/BaTiO3 composite thin film

The wearable intelligent electronic product similar to electronic skin has a great application prospect. However, flexible electronic with high performance pressure sensing functions are still facing great challenges. In this paper, the highly sensitive flexible electronic skin (FES) based on the PVDF/rGO/BaTiO₃ composite thin film was fabricated using the near-field electrohydrodynamic direct-writing (NFEDW) method. The PVDF/rGO/BaTiO₃ composite solution was directly written on flexible substrate by the NFEDW method to fabricate FES with micro/nano fiber structure, which has the function of sensing pressure with high sensitivity and fast response. The surface morphology and microstructure were characterized by SEM, AFM, and optical microscope in detail. The fabricated FES has high sensitivity (59 kPa⁻¹) and faster response time (130 ms). FES has been successfully applied to the detection of human motion and subtle physiological signals. The experimental results show that FES has good stability and reliability. FES can recognize human motion, and it has a broad application prospect in the field of wearable devices.     

A novel MEMS inertial sensor with enhanced sensing capacitors

A novel MEMS inertial sensor with enhanced sensing capacitors is developed. The designed fabricated process of the sensor is a deep RIE process, which can increase the mass of the seismic to reduce the mechanical noise, and the designed capacitance sensing method is changing the capacitance area, which can reduce the air damping between the sensing capacitor plates and reduce the requirement for the DRIE process precision, and reduce the electronic noise by increasing the sensing voltage to improve the resolution. The design and simulation are also verified by using the FEM tool ANSYS. The simulated results show that the transverse sensitivity of the sensor is approximately equal to zero. Finally, the fabricated process based on silicon-glass bonding and the preliminary test results of the device for testing grid capacitors and the novel inertial sensor are presented. The testing quality factor of the testing device based on the slide-film damping effect is 514, which shows that the enhanced capacitors can reduce mechanical noise. The preliminary testing result of the sensitivity is 0.492 pf/g.