低功耗便携式心电仪的设计

介绍了一种低功耗便携式心电仪的设计与实现.采用MSP430F169作为核心控制器,配有心电信号采集调理电路、液晶显示模块和数据存储模块等.该心电仪能够对心电进行实时采集处理、显示,而且可以将存储在SD卡内的数据通过USB接口在上位机上进行显示、分析,功耗低、方便携带,有较强的通用性.     

便携式叶绿素采集仪研发

为了实现田间作物叶片叶绿素含量的快速、无损检测,基于AT89S52单片机开发了一款便携式叶绿素采集处理终端。系统根据光电无损检测叶绿素的原理进行设计,通过比对940 nm和650 nm两束不同频率的光透过叶片的强度变化来定量描述叶片叶绿素的相对含量,实现对叶片叶绿素浓度的快速、实时、无损检测。仪器主要由光发射装置、光强度检测装置、微处理器模块、A/D模块、RS232通信模块等组成。实验结果表明仪器测量值与其他方法测量结果具有一致性,适合在我国进行推广。     

基于PQDIF格式的多通道便携式电能质量监测装置开发

基于信号采集传感器、信号调理电路、数据采集模块以及数据处理模块的电能质量监测装置硬件平台研发,电能质量监测软件设计与开发,研制了多通道便携式电能质量监测装置.结合电能质量数据与PQDIF(电能质量数据交换格式)的特点,构建了自定义数据文件向PQDIF格式转化流程框架,利用COM组件及LabWindows平台实现多通道便携式电能质量监测装置存储数据向PQDIF格式转化.并将所研制的基于PQDIF格式的多通道便携式电能质量监测装置通过第三方认证机构的精度检测,验证了本文系统设计方案的正确性以及该装置的稳定性.     

一种便携式多通道ARINC429总线信号检测装置的研制

为满足对航空机载设备多通道ARINC429总线现场检测的需要,以FPGA为主处理器,以CPLD为协处理器,以HS-3282/3182为ARINC429总线协议芯片,以触摸屏作为人机接口,设计了一种便携式多通道ARINC429总线检测装置.给出该装置的内部结构框图、各模块硬件电路设计及其软件流程框图,并开发出该装置触摸屏的测试软件.最后针对机载电路板件,对装置功能进行测试验证.测试结果表明,本装置操作简便,性能稳定可靠,可应用于带有ARINC429总线信号收发功能的机载电路板件的维修测试中.     

Potential future applications of direct,automated service activation

There is budding interest among telecommunications network and service providers in allowing subscribers to activate their telecommunications services by directly interacting with a fully automated service activation process. This capability facilitates both service turn-up for new customers and service addition for existing customers. Direct, automated service activation (DASA) is enabled by remote management of service attributes, which is governed by input from a variety of possible customer access channels. Some of the most promising direct input channels, beyond DTMF (dual-tone multi-frequency) keypad signaling, include centrally located video kiosks, portable analog display sets, and in-home video monitors. Another significant enabler for direct, automated activation is re-engineering key aspects of the existing service activation architecture. Three possible functional architectures for a DASA application, each progressively more complex, are out-lined. For any of these architectures, re-engineering must focus on several important aspects, such as the flexible sequencing of processing steps and closer alignment between network and administrative data.     

基于帧间差分法的目标检测研究与FPGA实现

针对以往帧间差分算法的硬件实现架构中数据同步信号设计复杂,调试周期较长的特点,设计了一种新型的硬件算法架构。整个系统基于Altera的Cyclone Ⅳ E系列进行开发,采用镁光的SDRAM作为高速储存器件,豪威科技的OV5640作为图像采集器件。该系统对采集到的原始图像数据进行灰度化处理,利用硬件差分算法模块对灰度图像进行差分处理与二值化,实现对视频图像中动态目标的捕捉。基于Quratus Ⅱ与Modelsim联合开发平台对系统进行硬件设计和功能模块仿真。硬件测试结果表明,系统能够清晰地检测出视频中的动态目标,且具备较好的实时性。     

便携式矿石电磁波检测装置的设计

岩体破裂过程中,电磁辐射(EME)是岩体受载变形破裂过程中向外辐射电磁能量的过程,与岩体的受载情况及变形破裂过程密切相关.在此基础上设计了一套便携式矿石电磁波检测装置,硬件系统主要由LPC2132处理器,电磁波检测模块,信号强度处理模块,强度指示模块等组成.软件系统由固件程序,信号自动收发模块等构成.     

基于ARM的分布式多通道数据采集仪

设计以ARM9S3C2451为核心处理器的分布式多通道数据采集仪。针对典型自动气象站的实际应用,设计并实现了外接设备驱动、ARM数据处理模块、ZigBee组网、数据通讯模块、A/D采样电路。阐明了数据采集仪嵌入式系统软件设计过程。经过测试,该数据采集仪在实际自动气象站应用中工作稳定,各项性能均能满足要求。     

基于DSP的高速列车车内噪声舒适性测量装置

为了满足高速列车车内噪声舒适性测量的需求,设计了一种基于DSP技术的便携式噪声舒适性测量装置。装置由控制部分和运算部分组成。控制部分以高性能、低功耗的EP1C6Q240C8为核心,扩展了A/D采集模块、SD卡存储模块;运算部分以低功耗DSP芯片TMS320VC5509A为核心,负责对噪声数据进行实时处理,并将结果交给FPGA发送到SD中保存;FPGA与DSP通过双口RAM相连接,使得2种处理器间的频率差异得到解决并实现高速传输。经实验验证:方案切实可行,为高速列车噪声舒适性测量提供了新的解决方案。     

融合光谱刺激和知觉训练的近视防控装置设计与开发

随着电子产品的普及,青少年儿童使用电子设备频率的不断增长,导致青少年儿童近视率的上升；为控制近视率的上升,对近视早期的控制能够预防后期近视的发生,设计开发了一种基于融合光谱刺激和知觉训练的便携式近视预防装置；装置以基于全志A133主板的安卓系统控制,采用ESP32无线传输模块在用户手机应用端登陆后传输用户信息至服务器和装置屏幕显示,并作为主板和灯光模块的通讯模块；灯光模块包括一个具有恒流电源驱动的灯光系统,该系统包含红光训练、LED白光后像训练、RBG多光谱训练和LED引导眼肌调节训练等灯光训练功能,其中以红光训练为主要功能,通过大小合适、光强安全、光斑均匀的低强度激光稳定照射视网膜来防止并改善眼轴长度的增加,能够保证视网膜多巴胺的含量,加快脉络膜、巩膜的血液循环,从而抑制近视的发生和发展；在进行光照训练后,运用装置内置的Unity视觉训练软件,进一步辅助眼睛的近视弱视预防；该设计为便携式近视预防装置提供了一个新的视角,可应用于医疗保健设备。     

A novel portable iris recognition system and usability evaluation

We propose a new portable iris recognition system. Because existing portable iris systems use customized embedded processing units, they are limited in ability to expand to other applications, and they have low processing power. To overcome such problems, we propose a new portable iris recognition system consisting of a conventional ultra-mobile personal computer (UMPC), a small universal serial bus (USB) iris camera, and near-infrared (NIR) light illuminators. In general, portable iris systems produce considerable optical blurring. Although auto-focusing motor-driven lenses can be used to overcome it, they are too bulky to be used in a small-sized portable iris system. Therefore, we adopt an iris image restoration algorithm which performs at real-time speed. And by using a conventional UMPC as a processing unit, our portable iris system is more extensible than previous systems. In general, the performance of iris recognition has been mainly evaluated based on the quantitative metrics such as EER (Equal Error Rate), ROC (Receiver Operational Characteristics) curve or recognition time. We propose a new performance measuring method based on qualitative metrics. That is usability evaluation including user acceptance, convenience, satisfaction and resistance.     

继电保护信息系统终端设备智能测试系统

为了达到快速、精准的继电保护信息系统终端设备测试效果,设计一种继电保护信息系统终端设备智能测试系统.利用无线方式将数据采集模块所采集的终端设备数据传输至数据处理模块;利用信号处理算法除掉原始数据中的干扰数据,使其符合监测预警模块的要求;实现终端设备运行状态量变化实时监测,并发出预警等级信息;智能测试模块将高于监测预警指...     

Design and implementation of S-MARKS: A secure middleware for pervasive computing applications

As portable devices have become a part of our everyday life, more people are unknowingly participating in a pervasive computing environment. People engage with not a single device for a specific purpose but many devices interacting with each other in the course of ordinary activity. With such prevalence of pervasive technology, the interaction between portable devices needs to be continuous and imperceptible to device users. Pervasive computing requires a small, scalable and robust network which relies heavily on the middleware to resolve communication and security issues. In this paper, we present the design and implementation of S-MARKS which incorporates device validation, resource discovery and a privacy module.     

An Automated Liquid-Liquid Extraction System Supervised by an Industrial Programmable Logic Controller

In the case of development of new products in organic synthesis, the final step of the process must offer the best purity. In this way, the final step is a unit operation of isolation like distillation, crystallisation or liquid-liquid extraction. Therefore, it is necessary to integrate a module of purification on an automated platform for achieving the whole process.In our case, an automated platform was based on Zymark architecture allowing us to automate sample preparation and the reaction steps. For the purification module, we opted to develop our own home module: a liquid-liquid extraction module. This unit operation permits us to separate the final product in the case of peptide synthesis in liquid phase, but equally, in the case of isolation of vegetable molecules.The module capacities had to permit the multistage extraction and the determination of the binodal curve for optimising the process, and to possess in our own system for liberating the Zymark robot for other tasks. The operator interface is developed by using a SCADA (supervisory control).     

基于LDRA TBrun软件集成测试的研究

Integration testing is to ensure that each functional module is correct and performs well, so that these modules can be as- sembled together to work well. The manual testing method of the tester alone cannot effectively evaluate the tested aviation soft- ware, and the use of advanced automated testing tools can overcome these difficulties. This paper introduces the method and process of integration testing with Testbed suite tool TBrun through a practical test project.     

基于代理程序开发核酸序列二次数据库

以构建核酸序列二次数据库为目的,基于Windows操作系统下,编译Web代理程序,介绍开发核酸序列二次数据库的一般过程。研究通用代理程序开发本地化核酸序列二次数据库的具体步骤,所涉及的关键技术以及常见问题解决。解决了生物信息数据繁多与数据处理工作量大问题,经反复调试基本实现了示例程序核酸序列二级数据库系统的构建。     

Automated real-time hit picking, retesting, and reflux testing

Advances in automation have enabled screening methods, such as enzymatic assays and ELISAs, to be performed in a high-throughput fashion. Instruments can perform each of the steps more rapidly and with fewer errors than humans, however, in many cases, humans still perform the key steps of integrating the instruments and Laboratory Information Management Systems (LIMS). Typically, the screening process involves multiple steps for sample testing, manual data entry and design of protocols to handle the positive samples, and final processing of positives. Fully integrated systems such as Protedyne's BioCube^™ System combine liquid handling, LIMS, plate washing, and plate reading in a device that is controlled via a single user interface. As an example, we present the results of automating plate reading and retesting of positive samples in a model protocol based on ELISA testing. By performing an automated initial screening of results, our system enables positive samples to be retested at higher stringency or sent to a technician for corroboration of results. The screening process then becomes a single protocol that starts with a sample set and results in a data set of tested and retested/reflux tested positives as well as re-arrayed plates of positive samples that are ready for additional downstream processing.     

On-chip semidense representation map for dense visual features driven by attention processes

We describe an intelligent scheme to condense dense vision features, efficiently reducing the size of representation maps and keeping relevant information for further processing during subsequent stages. We have integrated our condensation algorithm in a low-level-vision system that obtains several vision-features in real-time working on an FPGA. Within this framework, our condensation algorithm allows for the transfer of information from the FPGA device (or processing chip) to any co-processor (from embedded ones to external PCs or DSPs) under technological constraints (such as bandwidth, memory and performance ones). Our condensation core processes 1024 × 1024 resolution images at up to 90 fps. Hence, our condensation module performs this process introducing an insignificant delay in the vision system. A hardware implementation usually implies a simplified version of the vision-feature extractor. Therefore, our condensation process inherently regularizes low-level-vision features, effectively reducing discontinuities and errors. The semidense representation obtained is compatible with mid-/high-level-vision modules, usually implemented as software components. In addition, our versatile semidense map is ready to receive feedback from attention processes, integrating task-driven attention (i.e. top-down information) in real time. Thus, the main advantages of this core are: real-time throughput, versatility, inherent regularization, scalability and feedback from other stages.