針對(duì)目前汽車追尾事件頻發(fā)問(wèn)題，提出一種防汽車車前和車后追尾的安全裝置設(shè)計(jì)。該設(shè)計(jì)以高性能、低功耗的8位AVR微處理器ATmega8L為核心，結(jié)合霍爾式車速傳感器、激光雷達(dá)測(cè)距裝置和MMA7260QT加速度傳感器，能夠兼顧車前和車后，摒棄以往設(shè)計(jì)中只考慮車前或車后單一性缺點(diǎn)，尤其適用于高速、夜晚或新手行車。 Abstract: Aiming at the high frequency of vehicle rear-end collision，a safe device design of anti-vehicle rear-end collision is presented.In the design，the high-performance，low-power8-bit AVR microprocessor ATmega8L is utilized as a core combined with Hall-type speed sensor，laser-radar ranging devices and the acceleration sensor MMA7260QT.The design considers both the front and back of a car，and overcomes the drawbacks of former designs in which only the front or the back of the car is considered，so it is especially suitable for high-speed，night or the beginner’s driving.
上傳時(shí)間： 2013-10-14
上傳用戶：GavinNeko
實(shí)時(shí)時(shí)鐘是微機(jī)保護(hù)裝置的重要部件，在討論P(yáng)CF8583結(jié)構(gòu)與功能的基礎(chǔ)上，提出采用dsPIC33F系列微處理器與串行I2C時(shí)鐘PCF8583的接口設(shè)計(jì)方案，給出了相應(yīng)的接口電路與軟件流程。該設(shè)計(jì)方案結(jié)構(gòu)簡(jiǎn)單，可靠性高，開(kāi)發(fā)周期短，具有一定的實(shí)用與參考價(jià)值。所設(shè)計(jì)的微機(jī)保護(hù)裝置已投入現(xiàn)場(chǎng)運(yùn)行，效果良好。 Abstract: Real-time clock chip is an important part in microcomputer protection device.Based on discussing the structure and function of PCF8583，a new interface scheme which uses dsPIC33F microprocessor and serial clock chip（I2C）PCF8583is proposed.The method of the circuit design and the main software flow are introduced in this paper.The scheme has simple structure，higher reliability and shorter exploitation cycle，so has definite practicality or reference value.The microcomputer protection device has been put into operation with better effects.
標(biāo)簽： 8583 PCF 串行時(shí)鐘 中的應(yīng)用
上傳時(shí)間： 2013-11-18
上傳用戶：Thuan
介紹一種基于C8051單片機(jī)的動(dòng)態(tài)心電監(jiān)護(hù)系統(tǒng)。該系統(tǒng)由兩部分組成：以C8051F320單片機(jī)為核心的數(shù)據(jù)采集裝置和以PC機(jī)為平臺(tái)的分析處理系統(tǒng)。硬件電路功耗低，由單片機(jī)自帶的USB接口將數(shù)據(jù)傳送給PC機(jī)。軟件平臺(tái)采用LabVIEW可視化虛擬儀器系統(tǒng)開(kāi)發(fā)平臺(tái)，將傳統(tǒng)儀器的功能模塊集成到計(jì)算機(jī)中，用戶可通過(guò)修改虛擬儀器的程序改變其功能。采用USB接口實(shí)時(shí)傳輸心電數(shù)據(jù)，并將數(shù)據(jù)采集模塊設(shè)計(jì)為計(jì)算機(jī)外設(shè)，使該系統(tǒng)高速快捷、小巧便攜。 Abstract: In this design，a low-cost ECG electrocardiogram monitoring system is introduced，which consists of two parts:data acquisition device based on C8051F320and PC terminal as the analysis and processing system.The system is low-power consumption，the data is transmitted to the PC terminal by USB interface of the C8051F320.By using the visible virtual instrument system developing platform LabVIEW，the traditional instruments function modules are integrated into the computer，so the user can modify virtual instrument software to change its function to meet their needs.Using USB in-terface to realize real-time ECG data transmission，in addition，ECG data acquisition module is designed as the computer peripheral，which makes the syetem high-speed and portable.
標(biāo)簽： C8051F320 心電監(jiān)護(hù) 系統(tǒng)設(shè)計(jì)
上傳時(shí)間： 2013-11-13
上傳用戶：zhangzhenyu
介紹一種以Atmel公司的Attiny13為處理器的投影儀防盜器設(shè)計(jì)方案。該防盜器具有功耗低，功能完整，防盜效果良好等特點(diǎn)，除具有報(bào)警功能外，防盜器還具有以無(wú)線方式向主機(jī)發(fā)送報(bào)警信號(hào)的功能。采用315MHz發(fā)射模塊實(shí)現(xiàn)無(wú)線信號(hào)發(fā)送。該投影儀防盜器可適應(yīng)眾多廠家生產(chǎn)的防盜器主機(jī)。 Abstract: This paper introduces the design scheme of overhead projector's anti-theft device which users ATMEL company’s Attiny13as processor.This anti-theft device features low powerloss，functional integrity，good effect of anti-theft.In addition to its own with alarm functions，the anti-theft device also has alarm function which can send alarm signal to the host through wireless way.It sends wireless signal using315MHz transmitting module，so this overhead projector’s anti-theft device is adapted to anti-theft device host produced by many manufacturers.
上傳時(shí)間： 2013-11-02
上傳用戶：ysystc699
MG3500SoC是支持H.264高清編解碼器的片上系統(tǒng)，內(nèi)部集成一個(gè)嵌入式ARM926處理器，支持高清H.264編解碼、MPEG鄄2解碼和JPEG編解碼。介紹了MG3500SoC的主要性能特點(diǎn)、引腳排列、主要接口功能及在DVR上的應(yīng)用，以及MG3500SoC及其周圍器件的硬件設(shè)計(jì)，提出了在設(shè)計(jì)中應(yīng)注意的問(wèn)題。 Abstract: The MG3500System-on-Chip（SoC）is high definition（HD）H.264codec,including ARM926-EJ processor，H.264encoder/decoder，MPEG2decoder and JPEG/MJPEG encoder/decoder.The features,pin assignments，interfaces and the typical application of MG3500in DVR are introduced in this paper.The application hardware circuit between the MG3500SoC and peripheral device are given,the questions which the syetem design needs to pay attention are explained.
上傳時(shí)間： 2013-11-12
上傳用戶：elinuxzj
數(shù)字信號(hào)處理器dsPIC33F集多通道高精度A/D轉(zhuǎn)換、多通訊模式、看門(mén)狗、CMOS Flash技術(shù)等于一體，其內(nèi)部可完成所有數(shù)據(jù)操作，實(shí)現(xiàn)總線不出芯片技術(shù)。將該處理器應(yīng)用于微機(jī)保護(hù)裝置，提出基于dsPIC33F微處理器的微機(jī)保護(hù)裝置的設(shè)計(jì)方案，給出相應(yīng)的接口電路與軟件流程。該設(shè)計(jì)方案結(jié)構(gòu)簡(jiǎn)單，性價(jià)比及可靠性高，開(kāi)發(fā)周期短，具有一定的實(shí)用推廣價(jià)值。所研制的微機(jī)保護(hù)裝置現(xiàn)場(chǎng)運(yùn)行效果良好。 Abstract: The dsPIC33F microprocessor has a plentiful interior resource which contains multi-channel，high precision A/D converters，multi-communication module，watchdog，CMOS Flash technology，and so on.All data manipulations is accomplished interiorly.What is more，it makes the technology that bus does not go beyond the chip comes into practice.The paper put forwards a design scheme based on dsPIC33F microprocessor.The scheme has the advantages of simple structure，high reliability and shortened exploitation cycle.What is more，it has definite practicality and reference.The microcomputer protection device has been put into operation with excellent effects.
上傳時(shí)間： 2013-11-16
上傳用戶：開(kāi)懷常笑
在開(kāi)放式數(shù)控系統(tǒng)結(jié)構(gòu)模型的基礎(chǔ)上，研究了基于ISA總線的DSP通信控制原理。采用中斷方式完成了PC機(jī)和DSP之間的通信。介紹了以DriverWorks為工具開(kāi)發(fā)ISA設(shè)備WDM驅(qū)動(dòng)程序的方法，探討了中斷處理、驅(qū)動(dòng)程序與應(yīng)用程序之間的通信,簡(jiǎn)要說(shuō)明了驅(qū)動(dòng)程序的安裝與調(diào)試。通過(guò)調(diào)試,系統(tǒng)設(shè)計(jì)運(yùn)行穩(wěn)定。 Abstract: The ISA bus and DSP correspondence control principle is investigated in the basis of the existing open architecture numerical control system.The interrupt method is used to realize the communication between PC and DSP based on the ISA bus.The methods of WDM driver exploitation for ISA device using Driver Works are introduced.The main process of driver program and the keys such as handle interrupt and the communication between the drivers and application are presented.And how to debug and install the drive is explained.
標(biāo)簽： ISA DSP 總線 計(jì)算機(jī)
上傳時(shí)間： 2013-11-04
上傳用戶：kang1923
針對(duì)目前燃?xì)庠钍袌?chǎng)的狀況，提出一種基于PIC16C711單片機(jī)的燃?xì)庠蠲}沖點(diǎn)火控制器設(shè)計(jì),具體包括有系統(tǒng)的組成和功能介紹、硬件電路設(shè)計(jì)及軟件功能實(shí)現(xiàn)。 Abstract: Aiming at today’s gas cooker market, a pulse ignition controler design based on PIC16C711 is presented.The specific descriptions of system components and functions,hardware circuit design and software function are given.
上傳時(shí)間： 2013-10-31
上傳用戶：zhqzal1014
針對(duì)眾多低成本數(shù)據(jù)采集需求，采用帶有片上USB控制器和D/A轉(zhuǎn)換器的混合信號(hào)微處理器C8051F340，設(shè)計(jì)了一款可通過(guò)USB接口和LabVIEW圖形用戶界面實(shí)現(xiàn)與PC機(jī)聯(lián)機(jī)的數(shù)據(jù)采集器，同時(shí)借助系統(tǒng)的SD卡存儲(chǔ)獨(dú)立實(shí)現(xiàn)現(xiàn)場(chǎng)長(zhǎng)時(shí)間采集數(shù)據(jù)。該數(shù)據(jù)采集器成本低，結(jié)構(gòu)簡(jiǎn)單，體積小，已成功用于工業(yè)現(xiàn)場(chǎng)。 Abstract: Aiming at the need of low cost data acquisition, a data acquisition device is designed based on C8051F340 which is a mixed-signal microcontroller and integrates USB controller and A/D controller on a chip.The data acquisition device which can combine with PC by USB interface and LabVIEW graphical user interface,can realize data acquisition. At the same time,it can be solely run a long time in virtue of SD card in field.The date aequisition device features low cost,simple structure and little sharp, and it has been used in industry field.
標(biāo)簽： C8051F340 數(shù)據(jù) 集器設(shè)計(jì)
上傳時(shí)間： 2014-05-31
上傳用戶：1109003457
The PCF8578 is a low power CMOS1 LCD row and column driver, designed to drive dotmatrix graphic displays at multiplex rates of 1:8, 1:16, 1:24 or 1:32. The device has40 outputs, of which 24 are programmable and configurable for the following ratios ofrows/columns: 32¤8, 24¤16, 16¤24 or 8¤32. The PCF8578 can function as a stand-alone LCDcontroller and driver for use in small systems. For larger systems it can be used inconjunction with up to 32 PCF8579s for which it has been optimized. Together these twodevices form a general purpose LCD dot matrix driver chip set, capable of driving displaysof up to 40960 dots. The PCF8578 is compatible with most microcontrollers andcommunicates via a two-line bidirectional bus (I2C-bus). Communication overhead isminimized by a display RAM with auto-incremented addressing and display bankswitching.
標(biāo)簽： 8578 PCF LCD 圖形點(diǎn)陣
上傳時(shí)間： 2013-10-23
上傳用戶：頂?shù)弥?/p>
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