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1、Unit 5 Embedded Systems,教学目标 教学内容,教学目标,掌握嵌入式技术的基本概念 了解嵌入式技术的的发展简史 掌握嵌入式系统的体系结构 了解嵌入式技术的应用情况 掌握嵌入式软件的体系结构,教学内容,Text 1 Introduction of Embedded Systems Text 2 Embedded software architectures,Text 1 Introduction of Embedded Systems,Main Contents Words and Expressions Exercises,An embedded system is a s
2、pecial-purpose computer system designed to perform one or a few dedicated functions, often with real-time computing constraints. It is usually embedded as part of a complete device including hardware and mechanical parts. In contrast, a general-purpose computer, such as a personal computer, can do m
3、any different tasks depending on programming. Embedded systems control many of the common devices in use today. In general,“embedded system”is not an exactly defined term, as many systems have some element of programmability. For example, Handheld computers share some elements with embedded systems
4、such as the operating systems and microprocessors which power them but are not truly embedded systems, because they allow different applications to be loaded and peripherals to be connected. Embedded systems span all aspects of modern life and there are many examples of their use.,Text 1 Introductio
5、n of Embedded Systems,Text 1 Introduction of Embedded Systems,Telecommunications systems employ numerous embedded systems from telephone switches for the network to mobile phones at the end-user. Computer networking uses dedicated routers and network bridges to route data. Consumer electronics inclu
6、de personal digital assistants (PDAs), mp3 players, mobile phones, videogame consoles, digital cameras, DVD players, GPS receivers, and printers. Many household appliances, such as microwave ovens, washing machines and dishwashers, are including embedded systems to provide flexibility, efficiency an
7、d features. Advanced HVAC systems use networked thermostats to more accurately and efficiently control temperature that can change by time of day and season. Home automation uses wired- and wireless-networking that can be used to control lights, climate, security, audio/visual, surveillance, etc., a
8、ll of which use embedded devices for sensing and controlling.,Text 1 Introduction of Embedded Systems,Transportation systems from flight to automobiles increasingly use embedded systems. New airplanes contain advanced avionics such as inertial guidance systems and GPS receivers that also have consid
9、erable safety requirements. Various electric motors brushless DC motors, induction motors and DC motors are using electric/electronic motor controllers. Automobiles, electric vehicles, and hybrid vehicles are increasingly using embedded systems to maximize efficiency and reduce pollution. Other auto
10、motive safety systems such as anti-lock braking system (ABS), Electronic Stability Control (ESC/ESP), traction control (TCS) and automatic four-wheel drive. Medical equipment is continuing to advance with more embedded systems for vital signs monitoring, electronic stethoscopes for amplifying sounds
11、, and various medical imaging (PET, SPECT, CT, MRI) for non-invasive internal inspections.,Text 1 Introduction of Embedded Systems,In addition to commonly described embedded systems based on small computers, a new class of miniature wireless devices called motes are quickly gaining popularity as the
12、 field of wireless sensor networking rises. Wireless sensor networking, WSN, makes use of miniaturization made possible by advanced IC design to couple full wireless subsystems to sophisticated sensor, enabling people and companies to measure a myriad of things in the physical world and act on this
13、information through IT monitoring and control systems. These motes are completely self contained, and will typically run off a battery source for many years before the batteries need to be changed or charged.,Words and Expressions,reliability ri,laibilitin. 可靠性 portable p:tbl adj. 轻便的，手提式的 stationar
14、y stei()nri adj. 不动的，稳定的，静止的 microcontroller n.微型控制器，微控制器，单片机 peripheral prifrl n. （电脑的）外部设备 ；adj. 不重要的，外围的 chassis si n. 底座，（车身）底盘， enclosure inklu n. 附件，围墙，围绕，【计】围封部分 programmability n.可编程性：减少应用方案的开发时间，降低系统运行和维护成本，提高系统使用效率； handheld adj. 手持式，掌上型 microprocessor maikrprses(r) n.微处理器 flash memory n.
15、闪存 telecommunication telikmju:nikeinn. 电传视讯,远距离通信,电磁通信,Words and Expressions,router ru:t(r), ra- n.路由程序,路由器 PDA 个人数字助理，掌上电脑，是Personal Digital Assistant的缩写 GPS 即全球定位系统，Global Positioning System HVAC（Heat Ventilation Air Conditionar）暖通空调； Heating Ventilating and Air Conditioning制热、通风与空调控制 thermostat :
16、mstt n. 恒温器，节温器 surveillance s:veilns n. 监视,监督 avionics,eiviniks n. 航空电子学(航空用电子设备,控制系统)，电子设备 inertial guidance systems 惯性制导系统 considerable knsidrbladj. 相当的,可观的,重要的 hybrid vehicle混合驱动汽车，合成车 anti-lock braking system (ABS) 防抱死制动系统,Words and Expressions,electronic stethoscope电子听诊器 amplify mpli,fai v. 扩大，详述，使.增幅，放大，加强 non-invasive adj. 非侵入，非损伤 inspection inspekn n. 检查,视察 miniature minjt n. 缩图,小画像；adj. 小
