基于单片机的汽车多功能报警系统设计The Design of Automobile Multi-function AlarmingBased on Single Chip computer刘法治赵明富宁睡达(河 南 科 技 学 院 ，新 乡 453 00 3)摘要介绍了一种基于单片机控制的汽车多功能报警系统，它能对汽车的润滑系统油压、制动系统气压、冷却系统温度、轮胎欠压及防盗进行自动检测，并在发现异常情况时，发出声光报警。阐述了该报警系统的硬件组成及软件设计方法。关键词单片机传感器数模转换报警Abstract Am ulti-fimctiona utomobilea larnungs ystemb asedo ns inglec hipc omputerco ntorlis in torducedin th isp aper.Th eo ilpr essuero flu bricatesystem, air pressure of braking system, temperature of cooling system, under pressure of tyre and guard against theft， detected automaticaly场thesystem. Audio and visual alarms wil be provided under abnormal conditions厂The hardware composition and software design of the system， described.Keywords Singlec hipc omputer Sensor Digital-t-oanaloguec onversion Alarmin 汽车多功能报苦器硬件系统设计根据 系 统 实际需要和产品性价比，选用ATMEL公司新生产的采用CMOs工艺的低功耗、高性能8位单片机AT89S52作为系统的控制器。AT89S52的片内有8k Bytes LSP Flash闪烁存储器，可进行100(〕次写、擦除操作;256Bytes内部数据存储器(RAM);3 2 根可编程输N输出线;2个可编程全双工串行通道;看门狗(WTD)电路等。系统由传感器、单片机、模数转换器、无线信号发射电路、指示灯驱动电路、声光报警驱动电KD一9563，发出三声二闪光。并触发一个高电平，驱动无线信号发射电路。
上传时间： 2013-11-09
上传用户：gxmm
一种基于ST62单片机的称重显示控制器A Weighing Display Controller Based on ST62 Single Chip computer祛 FA(上海时博飞奥控制系统有限公司，上海201100)摘要在介绍了基于ST62单片机的基础上，详细描述了称重显控制器的硬件设计和软件设计思路。该控制器结构简单、操作方便、抗扰能力强等优点;具有较好的推广应用价值。关键词称重显示控制仪ST62单片机硬件设计软件设计Abstract Ont heb asiso fin torductiono fST 62s inglec hipc omputer,th ed esignc oncrptof h ardwarea nds oftwarefo rw eighingd isplayc ontorleris d escrbed.The controler features simple structure, ease operation, powerful capability of anti-interference, etc.，it is wealth to be promoted into practicalapplicationsKeywords We妙吨display0 引言ST62s inglec hip Hardwared esign Softwaer design备 份 振 荡器，振荡器保护电路，上电复位及低压检测复称 重 显 示控制器是一种具有数字显示、开关量输出、定值控制和通信功能的以微机为操作核心的称重控制装置。它是电子衡器的重要基础部件，直接影响电子衡器及电子称重系统的功能和性能。与合适的传感器及承重传力复位系统组合可组成配料秤、料斗秤、定值秤、平台秤、汽车秤等，广泛应用于电力、化工、建筑、冶金、交通运输、食品、军工等部门，是进行自动称重配料控制和生产过程自动化必不可少的重要检测、控制装置。随着 称 重 计量自动化水平的提高，对称重显示控制器的要求也越来越高。为实现低漂移、高稳定，本控制器采用低漂移、高增益放大器AD620和高分辨率的A/D转换器CS5550。为提高稳定性和可靠性，采用集成度高的、抗干扰能力强的ST62单片机。
上传时间： 2013-10-29
上传用户：钓鳌牧马
单片机系统“PC”失控的软件措施Software Measure of GettingO uto fC ontrolfo r“PC"in S ingleC hipC omputerS ystem谧 加 春 王 晓 基 雷 小 华(江 西 理 工 大 学机 电 工 程 学 院 ，赣 州 34 10 00)摘要单片机系统在实际工业现场中可能遇到各种干扰和自身的随机性故障。现场恶劣的环境有可能使计算机系统发生异常，计算机程序指针“PC”失控就是常见的故障之一，如果发生“PC”失控，将导致CPI工作混乱，酿成严重的事故。研究了“PC”失控的原因，并指出软件抗干扰的几种方法，有效保证单片机系统的正常工作。关键词单片机“PC”失控抗干扰Abstract Inp racticalin dustrialfi elds,th ereis v ariousin terferencea fectingo perationo fsi nglec hipc omputersy stemsa ndt hec omputersy stems。fac吨random faults饰themselves. It is very common that the severe environment makes the computer systems abnormal. The program counter "PC"gettingo utof co ntorlis on eo fth ec ommonfa ults.If th isoc curs,C PUw ouldb eru nningo utof or deran din torducesse riousan cient.T hec ausesof " PC"geting out of control， studied in this paper and some countermeasures of anti-interference师software are given to ensure single chip computer systemworking properly.Keywords Single。饰computer Porgramc ounter"P C" Anti-interfeernc 在设 计 和 开发单片机系统时，一般难以周全地预计单片机系统在实际工业现场中可能遇到的各种干扰和自身的随机性故障。因此，除了采取防止和抑制干扰的各项措施外，还应该借助于软件措施克服某些干扰，系统还应具备迅速自行恢复的能力。本文介绍的应对单片机系统PC失控的软件措施，设计灵活，节省硬件资源，能保证测控系统长期可靠地运行。MC S- 5 1单片机以其优良的性能价格比大量应用于工业现场测试和控制领域。但是，现场恶劣的环境有可能使计算机系统发生异常，计算机程序指针PC失控就是常见的故障之一，一旦发生PC“走飞”，计算机系统就会出现工作混乱，酿成严重的事故。为 了 在 CP 失控时尽量减少由此带来的不利影响，并尽快使系统恢复正常，需要采取一定的软件措施和硬件措施。常见的硬件措施有“看门狗”电路。软件措施设置的前提条件是:①在干扰作用下，微机系统硬件部分不会受到任何损坏，或者损坏部分设置有监测状态可供查询;②程序区不会受到干扰侵害。单片机系统的程序和表格以及重要的参数均设置在ROM区，不会因干扰的侵人而改变;③ RAM区中的重要数据不会被破坏，或者虽然被破坏，但是可以重新建立。
上传时间： 2013-11-02
上传用户：bhqrd30
The PL2303 USB to Serial adapter is your smart and convenient accessory forconnecting RS-232 serial devices to your USB-equipped Windows host computer. Itprovides a bridge connection with a standard DB 9-pin male serial port connector inone end and a standard Type-A USB plug connector on the other end. You simplyattach the serial device onto the serial port of the cable and plug the USB connectorinto your PC USB port. It allows a simple and easy way of adding serial connectionsto your PC without having to go thru inserting a serial card and traditional portconfiguration.This USB to Serial adapter is ideal for connecting modems, cellular phones, PDAs,digital cameras, card readers and other serial devices to your computer. It providesserial connections up to 1Mbps of data transfer rate. And since USB does not requireany IRQ resource, more devices can be attached to the system without the previoushassles of device and resource conflicts.Finally, the PL-2303 USB to Serial adapter is a fully USB Specification compliantdevice and therefore supports advanced power management such as suspend andresume operations as well as remote wakeup. The PL-2303 USB Serial cable adapteris designed to work on all Windows operating systems.
上传时间： 2013-11-01
上传用户：ghostparker
（Portmon is an application that lets you monitor serial and parallel activity on your local system, or any computer on the network that you can reach via TCP/IP. It is the most powerful tool available for tracking down port-related configuration problems and analyzing application port usage.）
上传时间： 2013-11-07
上传用户：1412904892
针对运行中火车测速运用多普勒效应采用DSP 设计雷达测速系统并阐述了其基本设计思想与工作原理给出系统硬件软件设计结构和原理图改善了原有光电测速精度提高了系统工作稳定性和可靠性经实验证明DSP 采集板工作稳定测速效果好关键词DSP; 雷达测速; 多普勒效应 On Board DSP-Based Radar Speed Measurement System TANG Wei, SUN Zhi-fang, CHEN Quan (Dept.of computer Science,Yangtze University,Jingzhou 434023,China)Abstract: This paper presents a DSP-based train speed measurement by using Doppler radar. The structure of the system is introduced.The hardware and software are also discussed.Key words: DSP; rader speed measurement; doppler principle
上传时间： 2013-10-27
上传用户：003030
1 Communication Protocol (computer as master) The communication protocol describes here allows your computer to access 4096 internal registers (W0000-W4095) and 1024 internal relays (B0000-B1023) in the Workstation.. 1.1 Request Message Format Request message is a command message to be sent from the computer to the Workstation. The data structure of request message is shown below. Note that numbers are always in hexadecimal form and converted into ASCII characters. For example, Workstation unit number 14 will appear in the message as character 0(30h) followed by character E(45h); a BCC of 5Ah will appear in the message as character 5(35h) followed by character A(41h).
上传时间： 2013-10-28
上传用户：cxl274287265
The field of microelectromechanical systems (MEMS), particularly micromachinedmechanical transducers, has been expanding over recent years, and the productioncosts of these devices continue to fall. Using materials, fabrication processes, anddesign tools originally developed for the microelectronic circuits industry, newtypes of microengineered device are evolving all the time—many offering numerousadvantages over their traditional counterparts. The electrical properties of siliconhave been well understood for many years, but it is the mechanical properties thathave been exploited in many examples of MEMS. This book may seem slightlyunusual in that it has four editors. However, since we all work together in this fieldwithin the School of Electronics and computer Science at the University of Southampton,it seemed natural to work together on a project like this. MEMS are nowappearing as part of the syllabus for both undergraduate and postgraduate coursesat many universities, and we hope that this book will complement the teaching thatis taking place in this area.
上传时间： 2013-10-16
上传用户：朗朗乾坤
本文主要通过介绍PLC通讯的意义和三菱FX系列PLC的四种通讯方式，并重点介绍FX系列PLC与计算机无协议通讯，主要从无协议通讯的硬件、配线、数据寄存器设置、PLC与计算机无协议通讯的指令用法、PLC程序编写和计算机VB程序的编写来说明无协议通讯的过程和一般方法。 My dissertation introduces the significance of PLC communications and the four means of communication of Mitsubishi FX’s PLC, And highlights the no protocol communications of FX series PLC and computer, no protocol communications hardware, wiring, Register data set, and the usage of command about no protocol communications, How to write PLC program and computer VB program to illustrate the process of no protocol communications and general method.
上传时间： 2014-11-29
上传用户：Jerry_Chow
A computer-On-Module, or COM, is a Module with all components necessary for a bootable host computer, packaged as a super component. A COM requires a Carrier Board to bring out I/O and to power up. COMs are used to build single board computer solutions and offer OEMs fast time-to-market with reduced development cost. Like integrated circuits, they provide OEMs with significant freedom in meeting form-fit-function requirements. For all these reasons the COM methodology has gained much popularity with OEMs in the embedded industry. COM Express® is an open industry standard for computer-On-Modules. It is designed to be future proof and to provide a smooth transition path from legacy parallel interfaces to LVDS (Low Voltage Differential Signaling) interfaces. These include the PCI bus and parallel ATA on the one hand and PCI Express and Serial ATA on the other hand.
上传时间： 2013-11-05
上传用户：Wwill
