(论坛)心电监护系统中WIFI传输的设计与实现

本文提出了心电监护系统中WIFI传输的设计与实现。MCU按照一定数据格式把数据传给WIFI模块,WIFI模块通过TCP协议将数据传输到服务器,最终在服务器上解析出心电波形,实现不丢帧的实时传输。     

心电监护系统中WIFI传输的设计与实现

提出了心电监护系统中WIFI传输的设计与实现。考虑WIFI模块的体积、功耗、差错率等问题选用REDPINE SIG-NALS公司的RS9110-N-11-22模块,为提高WIFI传输速度选用SPI接口的WIFI模块与MCU进行通讯,SPI接口的通讯速率可达25 MHz。MCU按照一定的数据格式把数据传给WIFI模块,WIFI模块通过TCP协议将数据传输到服务器,最终在服务器上解析出心电波形,实现不丢帧的实时传输。     

心电远程监测系统设计

研制一种功能强大、成本低的心电远程监测系统,可实现远程医疗心脏病患者.该系统前端采用FPGA控制,采集和存储人体的心电(ECG)信号,通过串口将心电数据传入计算机,并在LabVIEW软件平台下实现心电信号的显示和远程传输系统.其中大部分功能是由软件设计实现,以便于后续功能扩展.实验结果达到预期目标.该系统可广泛用于医院、社区、家庭、户外监护,帮助医生及时诊断病人.     

基于GPRS网络的远程心电监护系统

针对通常的心电监护只能在医院实施的问题,研究并开发了一种远程心电实时监护系统。该监护系统将GPRS（通用分组无线电业务）无线发送模块集成到$3C2410高性能微处理器控制的心电信号采集处理模块上,病人佩戴后获取心电数据,借助GPRS移动通信网络实时上传到医院监护中心,经医生诊断后及时将诊断结果反馈给病人,从而实现院外流动病人的远程监护和治疗。该监护仪能在GPRS网络覆盖范围内,随时随地对病人进行心电监护。与现有的同类设备相比,其体积小、重量轻、成本低廉、佩戴方便,监护效果理想。     

心电远程监测系统设计

研制一种功能强大、成本低的心电远程监测系统,可实现远程医疗心脏病患者。该系统前端采用FPGA控制,采集和存储人体的心电（ECG）信号,通过串口将心电数据传入计算机,并在LabVIEW软件平台下实现心电信号的显示和远程传输系统。其中大部分功能是由软件设计实现,以便于后续功能扩展。实验结果达到预期目标。该系统可广泛用于医院、社区、家庭、户外监护,帮助医生及时诊断病人。     

基于LabVIEW的远程心电监护系统设计

基于LabVIEW平台开发出应用于远程心电监护系统监护中心的软件,包括服务器和医生客户端程序。服务器实现的功能有心电数据接收和存储、发送心电数据给医生客户端、反馈医生客户端诊断结果等;医生客户端实现的功能有接收服务器心电数据、心电数据显示、发送诊断结果、调用地图显示位置等。经过测试,软件操作平台界面友好,各个功能均得以实现,较好地完成了预期的设计需求。     

基于蓝牙技术的动态心电监护系统的开发

介绍了基于蓝牙模块SBT-800-RD设计出的心电无线监护系统.系统由主设备(中央监护仪)及七个从设备(心电监护掌中宝)构成.主从设备间通过蓝牙模块组成的微微网进行数据无线传输.心电监护掌中宝可实现对心电信号的实时采集、分析以及对心律失常情况的诊断和报警功能,并且可以通过SRT-800-RD,把数据以无线传输的方式传送给中央监护仪,实现集中监测.     

远程无线心电监护系统的软件设计

心血管疾病具有突发性和高危险性,为了及时发现病情,需要对患者进行有效监护。文中设计了一套远程心电监护系统软件,通过对MC9S12XS128单片机底层程序的设计,完成了对心电信号数据的采集和GPRS模块的AT指令控制,由此实现心电信号数据的无线传输。操作简单、界面友好的监护系统部分采用了LabVIEW图形化编程环境,对采集到的心电信号进行分析、处理、显示以及存储,操作者可以实时监测被测者的心电情况,便于及时做出诊断,及早治疗,同时设置了自动报警系统。     

基于Android的自动数据统计系统设计

针对目前答辩器、投票器等数据统计系统必须使用专用遥控器才能进行遥控操作所带来的不便,结合基于Android操作系统的智能手机终端日益普及的现实,提出了一种利用智能手机代替传统遥控器实现多功能数据统计的设计方案。本设计通过安装在Android智能手机上的应用程序,借助手机终端WIFI硬件平台与显示器上的WIFI接收模块交换数据,并由中央控制芯片FPGA接收、分析、处理所接收的数据,实现无线遥控与数据统计。经系统制作、综合联调,设计达到预期的目标。     

基于安卓手机的远程心电测量系统的设计

为了测量运动员的心电信号,并远程发送给教练和医生,设计了一种基于安卓手机的心电测量系统。系统由检测模块、安卓手机端软件、服务器组成。检测模块检测心电信号,并通过蓝牙把信号发送到运动员手机上,手机上的软件把数据通过网络发送到服务器端,服务器端的软件对接收到的数据滤波处理,还原出心电波形图,并计算心率,同时远程发送到运动员、教练和医生的手机。经测试,测量数据精度较高,系统工作稳定。     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Nanoimprint Lithography -A Next Generation High Volume Lithography Technique

IntroductionNanoimprint Lithography is a well-acknowl-edged low cost, high resolution, large area pattern-ing process. It includes the most promising methods,high-pressure hot embossing lithography (HEL) [2],UV-cured imprinting (UV-NIL) [3] and micro contactprinting (m-CP, MCP) [4]. Curing of the imprintedstructures is either done by subsequent UV-lightexposure in the case of UV-NIL or by cooling downbelow the glass transition temperature of the ther-moplastic material in case of HEL…     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

Influence of PVK ： NPB hole transporting layer on the characteristics of organic light-emitting devices

A doping system consisting of NPB and PVK is employed as a composite hole transporting layer （CHTL）. By adjusting the component ratio of the doping system, a series of devices with different concentration proportion of PVK ： NPB are constracted. The result shows that doping concentration of NPB enhances the competence of hole transporting ability, and modifies the recombination region of charge as well as affects the surface morphology of doped film. Optimum device with a maximum brightness of 7852 cd/m^2 and a power efficiency of 1.75 lm/W has been obtained by choosing a concentration proportion of PVK ： NPB at 1：3.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.     

Analysis of error performance on Turbo coded FDPIM

Due to variable symbol length of digital pulse interval modulation（DPIM）, it is difficult to analyze the error performances of Turbo coded DPIM. To solve this problem, a fixed-length digital pulse interval modulation（FDPIM） method is provided. The FDPIM modulation structure is introduced. The packet error rates of uncoded FDPIM are analyzed and compared with that of DPIM. Bit error rates of Turbo coded FDPIM are simulated based on three kinds of analytical models under weak turbulence channel. The results show that packet error rate of uncoded FDPIM is inferior to that of uncoded DPIM. However, FDPIM is easy to be implemented and easy to be combined, with Turbo code for soft-decision because of its fixed length. Besides, the introduction of Turbo code in this modulation can decrease the average power about 10 dBm, which means that it can improve the error performance of the system effectively.     

A method for calculating the center position of collimated light

It is a key problem to accurately calculate beam spots＇ center of measuring the warp by using a collimated laser. A new method, named double geometrical center method （DGCM）, is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device （CCD） is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What＇s more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.