红外遥控信号的一种编码解码方法

以HS0038(红外信号接收频率为38kHz)作为红外接收头，详细介绍了红外遥控信号的单片机软件编码解码方法，包括编码、调制和解码的原理以及以AT89C2051为核心的硬件电路和程序实现，实现了基于字节的红外数据传输。经实验测试，该方法能使红外遥控信号可靠发送和接收，传输距离可达15m，如果适当减少编码所用的脉冲个数，传输速度可达1200bit／s，该方法可用于一些计算机控制系统中。     

氢气冷却干燥机多点温度采集系统设计与实现

本文设计了一种实用新型计算机多点温度采集系统，采用Cu50传感器作温度传感器，ICL7109作模数转换器，单片机采用AT89C51或AT89C52矣AT89C2051。测量误差符合系统所规定的要求。     

基于现场总线的嵌入式Internet服务器体系结构设计

构建了CAN总线与Internet通信的服务器体系结构 ,提出了嵌入式设备与Internet/Intranet间信息交换的层次模型 并给出了其设计方法和实现技术 ,为嵌入式设备的Internet网络化提供了一种切实可行的实现方案     

Optical microflow cytometer for particle counting, sizing and fluorescence detection

A novel on-chip optical flow cytometer concept is reported for fluorescence detection, enumeration, and sizing of microparticles in a poly-dimethylsiloxane (PDMS) microchip. The detection system integrates a pair of external optical fibers and other optical components for particle counting, sizing and fluorescence analysis in each measurement simultaneously. The scattered light signal indicates the total number and the size of the particles passing through the detection window, whereas the concurrent backward fluorescence signal shows only the number of fluorescence particles. In the experiments, microparticles of four different sizes with diameters ranging from 3.2 to 10.2 μm were discriminated and counted based on the fluorescence and scattered light intensity. The relative percentage of the fluorescence-labeled particles can be analyzed by the ratio of the events of fluorescence signals to forward scattered signals.     

水质监测无线传感器网络节点的设计

针对水质监测的要求,开发了一种兼容型的无线传感器网络节点系统,该系统以PIC24F系列单片机为核心,采用CC24202.4G射频芯片,软件上移植了微芯公司(Microchip)Zigbee协议栈,并在应用层开发了通信程序;该平台实现了通讯层的统一,兼容性高,便于移植,在Microchip协议栈的支持下,已经可以实现与CC2430开发板的通讯与混合组网,与其他硬件平台的兼容也只需要修改硬件层即可,从而可以使WSN的研发更多地放在顶层的应用方面,可以极大降低开发成本和周期,加快WSN在国内的商用化.     

微芯科技CEO谈运营和产品价值观

在全球金融危机时期,我们是美国大半导体公司中唯一没有裁员的公司.我们通过新产品开发、为客户新设计提供服务、改善运营效率和进行战略收购等,为经济复苏做好准备.Mirochip(美国微芯科技公司)总裁、首席执行官兼董事会主席steve sanghi日前在接受媒体采访时如是开场.他表示,无论在经济繁荣、衰退还是复苏时期,拥有稳健的员工队伍、具备前瞻性的研发创新能力,以及坚定不移地贯彻中国战略,是企业突破逆境、推动发展的制胜之道.在过去一年,Microchip通过停产将产能降低45%,并通过稳定库存来保证短交货周期以支持客户.     

Stabilized filling simulation of microchip encapsulation process

The filling process is a key stage of plastic encapsulation, which mainly affects the reliability of chips. This paper presents a stabilized filling simulation method of microchip encapsulation process. In this method, the non-isothermal and incompressible N-S equations coupled with the Kamal curing equation is introduced in as governing equations, and the Castro-Macosko model is employed as the constitutive model of the epoxy molding compound (EMC). The Galerkin/least-squares (GLS)-stabilized finite element method is used to solve the governing equations. With GLS scheme, numerical surge during the solution is relieved and equal order interpolation for velocity field and pressure field is achieved at the same time. A new kind of Euler’s method named piecewise linear interface calculation (PLIC)-flow analysis network (FAN) is proposed to track and describe the flow fronts for each time step. The experimental and numerical results are found to be in good agreement, which proves the accuracy and stabilization of this method.     

基于AVR微控制器的ADC按键设计技巧

利用ATMEL公司的Atmega168微处理器,采用AD转换方式来实现按摩椅控制器的键盘接口,通过在硬件电路中巧妙地选择电阻,在软件设计中采用数字滤波、二分法和区间鉴定等方法,灵敏可靠地实现了按摩椅中30个按键的处理。文中重点给出了硬件设计电路和软件设计思想以及部分汇编代码。     

Time capsule

Time Capsule is a work-experience that lies somewhere between a local eventinstallation, a site-specific work in which the site itself is both my body and a remote database, a simulcast on TV and the Web, and interactive webscanning of my body. The live component of the piece was realised on November 11, 1997, in the context of the exhibition Arte Suporte Computador, at the cultural centre Casa da Rosas, in Sao Paulo, Brazil. Time Capsule was carried live on the evening newscast of the TV station Canal 21 and on tape by two other TV stations (TV Manchete and TV Cultura). The webscast was transmitted by Casa das Rosas.The object that gives the piece its title is a microchip that contains a programmed identification number and that is integrated with a coil and a capacitor, all hermetically sealed in biocompatible glass. The temporal scale of the work is stretched between the ephemeral and the permanent; i.e., between the few minutes necessary for the completion of the basic procedure, the microchip implantation, and the permanent character of the implant. As with other underground time capsules, it is under the skin that this digital time capsule projects itself into the future.     

基于CPLD和单片机的高精度超声波测距研究

提出了一种基于CPLD和单片机的高精度超声波测距的设计方案。测距中的时间是通过高精度的晶体震荡器作为时钟信号源来进行计数测量。同时使用CPLD代替常用的单片机的纯软件方法实现动作控制,以减少误差。在CPLD电路设计中,充分考虑了延时所造成的误差并予以克服。