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关键词： 开发工具   软件平台   设计过程   MCU   嵌入式软件   梅   硬件设计   tools  

摘要： 爱特梅尔公司（Atmel Corporation）宣布推出完整硬件和软件平台的集成开发工具平台（integrated development tools platform），该平台是专为支持Atmel微控制器（MCU）和最近付运的ARM@CortexTM—M4-basedSAM4L系列而开发的，能够进一步简化MCU设计过程。现今的嵌入式硬件设计中，由于软件设计持续变得更加复杂．并且越来越多用于终端客户产品的差异化，因此为设计人员提供全部所需工具和嵌入式软件的完整解决方案变得更重要。甚至，随着设计周期继续缩短，完全集成且无缝使用的完整工具平台变得更关键。使用爱特梅尔的工具平台，设计工程师能够快速评测AtmelMCU器件，并将其产品快速带入市场。

关键词： 位移传感器   三维光栅   位移测量系统   硬件设计  

摘要： 为了检测机床刀具的三维位移、实时显示刀具的进刀量,提高工件的加工精度,研究并设计了一种基于光栅位移传感器的高精度三维光栅位移测量系统。分析了光栅位移传感器的测量原理,介绍了该系统的硬件设计,设计了光栅位移信号细分辨向电路、主控电路、显示电路及控制电路,制作了系统电路样板,搭建了实验系统并对系统进行了实验。实验结果表明:硬件电路工作正常,系统运行稳定、测量精准,可满足机床高精度测量的生产需求。

关键词： 单片机   遥控器   电路硬件设计   系统功能  

摘要： 随着科学技术的发展,当前,不论是在家用电器、工业生产、安全保卫以及人们的日常工作和生活中,遥控器的使用都很普遍。本文分析了以单片机为基础的遥控器电路硬件设计与系统功能的实现。

关键词： sensor design   power amplifier circuit   electro magnetic   underground wireless sensor network  

摘要： The demand using Wireless Sensor Network (WSN) in underground applications increases rapidly. At the present time, almost researches try to adapt current aboveground WSN platforms for underground applications in order to show a better transmission method. Unfortunately, the wireless communication range of WSN in underground applications is very limited because electromagnetic wave, which is used for aboveground wireless communication, is extremely attenuated in underground environment. In this paper, we analyze the theoretical communication limit and propose a hardware circuit increasing the wireless communication range for underground applications. The proposed design increases the range by improving output gain at transmitters. Experiments are performed to determine the actual distance limit. Circuit simulation results are also presented and confirmed that an output gain of wireless sensors is improved.

关键词： FPGA   Embedded machine vision   Optical flow   Real time image processing   Horn and Schunck algorithm  

摘要： Optical Flow (OF) information is used in higher level vision tasks in a variety of computer vision applications. However, its use in resource constrained applications such as small-scale mobile robotic platforms is limited because of the high computational complexity involved. The inability to compute the OF vector field in real-time is the main drawback which prevents these applications to efficiently utilize some successful techniques from the computer vision literature. In this work, we present the design and implementation of a high performance FPGA hardware with a small footprint and low power consumption that computes OF at a speed exceeding real-time performance. A well known OF algorithm by Horn and Schunck is selected for this baseline implementation. A detailed multiple-criteria performance analysis of the proposed hardware is presented with respect to computation speed, resource usage, power consumption and accuracy compared to a PC based floating-point implementation. The implemented hardware computes OF vector field on 256 x 256 pixels images in 3.89 ms i.e. 257 fps. Overall, the proposed implementation achieves a superior performance in terms of speed, power consumption and compactness while there is minimal loss of accuracy. We also make the FPGA design source available in full for research and academic use. (c) 2013 Elsevier B.V. All rights reserved.

关键词： CONCURRENT error detection   CRYPTOGRAPHY   CYBERTERRORISM   SWITCHING circuits   FAULT tolerance (Engineering)   COMPUTER algorithms   SIGNAL processing  

摘要： Thwarting severe cryptographic hardware attacks requires new approaches to logic and physical designs. This paper presents a systematic design approach to fault tolerant cryptographic hardware designs by combining the concurrent error detection and correction, and uniform switching activity cells. The effectiveness of the Hamming code based error correction schemes as a fault tolerance method in stream ciphers is investigated. Coding is applied to Linear Feedback Shift Registers (LFSR) based stream cipher implementations. The method was implemented on industrial standard stream ciphers, e.g. A5/1(GSM), E0 (Bluetooth), RC4 (WEP), and W7. The performance of stream cipher algorithms with error detection and correction was studied by synthesising the designs on FPGA and custom Integrated Circuits. The hardware building blocks are investigated to minimise switching activity of a circuit for all possible inputs and their transitions by adding redundant gates and increasing the overall number of signal transitions. The overheads of the proposed approach are also discussed. (C) 2013 Elsevier Ltd. All rights reserved.

关键词： finite impulse response digital filter   reconfigurable coefficient   hardware design  

摘要： This design using FPGA parallel architecture, high computing speed and high-speed reliability of USB2.0 interface, designed an FPGA + USB2.0 + computer FIR digital filter system, organically combining the speed of FPGA and flexibility of Computer through USB2.0 bus. The results demonstrated that the coefficients configuring of the system is easy, which can adjust the filter coefficients flexibly according to the actual demand, that it can effectively filter out the noise signals.

关键词： 电子万年历   单片机   时钟芯片   温度传感器   数码管显示  

摘要： 近年来,单片机技术的应用产品已经走进了千家万户,如电子万年历的出现给人们的生活带来了诸多方便。现如今在电子系统非常广泛的应用领域内,为使人们用最方便快捷的方式享受生活,设计人员能在更小的空间内实现更多功能,从而提高系统可靠性和速度。如银行、公交车、酒店等公共场所到处可见的电子万年历。让人们对生活方有了一个更便捷、更舒适的感觉,本文为对这种万年历设计的介绍和说明。本文描述了电子万年历系统硬件工作原理,并附以系统结构框图加以说明,着重介绍了本系统所应用的各硬件及其接口技术和各硬件模块的功能及工作过程;其次,详细阐述了程序的各个模块和实现过程。本设计以单片机技术为核心。编写的主导思想软硬件相结合,以硬件为基础,来进行各功能模块的编写。本系统便于扩展和更改。系统通过传感器采集温度。用四个数码管显示数据,可以显示时间和温度,也可以通过按键调整时间。

关键词： S7-200系列PLC   技术改造  

摘要： 化纤定型装置由原来传统的手动操作,用S7—200系列PLC可编程序控制器进行了全面的技术改造,改造成为由PLC进行统一控制的定时恒温自动控制系统。硬件的选择和参数的计算是一个重要的环节,选择合适的扩展模块和连接装置是编程的准备工作,设计中巧妙的利用模拟量输入和模拟量输出扩展模块组成PT100铂电阻采样电路;采用中断控制,分时分段进行采样,以600ms为周期对定型锅内部温度进行检测;用除法取余来实现采样分时,精确的反映了定型装置内部的温度变化的情况;用TD200进行文本显示,具有良好的人机对话界面,以便于工艺的变更和修改,更方便了工艺的需求。

关键词： 智能家居控制   嵌入式网关   ZigBee技术  

摘要： 论文主要对于现有智能家居控制系统进行分析,结合ARM嵌入式网关与ZigBee无线通信技术,给出了智能家居控制系统硬件设计的主要方案,并对系统功能和结构进行了研究设计。通过嵌入式网关和协调器对传感器节点进行控制和信号传输,用户可以使用手机或移动终端通过GPRS和互联网对家居设备节点远程访问和控制管理。