氣壓是氣象監(jiān)測(cè)中的一個(gè)重要參數(shù)，提出了一種氣壓數(shù)據(jù)采集模塊設(shè)計(jì)方案，該模塊采用數(shù)字氣壓傳感器MS5534B、MSP430單片機(jī)MSP430F2272和帶實(shí)時(shí)時(shí)鐘（RTC）64 KB鐵電存儲(chǔ)器。通過低功耗軟件設(shè)計(jì)方法以微安級(jí)整體平均功耗實(shí)現(xiàn)了氣壓數(shù)據(jù)的采集和存儲(chǔ)，適合電池供電的連續(xù)高精度氣壓采集應(yīng)用。給出了模塊的軟硬件設(shè)計(jì)以及MS5534B的性能指標(biāo)和使用經(jīng)驗(yàn)。 Abstract: Air pressure is an important parameter in weather monitor.This paper futs forward a new design scheme of low power-air pressure data acquisition module.The module uses a digital output barometer sensor MS5534B,MSP430 microcontroller MSP430F2272 and integrated RTC 64KB FRAM,precision air pressure measurement and storage chip.Another point of this module is low power consumption, so it is well suited for battery powered air pressure data acquisition applications. At the same time,the software and hardware deign of module is presented,And the speciaties and use notices of MS5534B are given.
上傳時(shí)間： 2014-12-27
上傳用戶：drink！
采用單片機(jī)AT89C2051實(shí)現(xiàn)溫度測(cè)量與控制,鍵盤和顯示電路實(shí)現(xiàn)溫度的設(shè)定、修改、清零以及當(dāng)前溫度值的顯示,并對(duì)溫度超過上下限進(jìn)行報(bào)警。闡述了該系統(tǒng)設(shè)計(jì)的硬件和軟件設(shè)計(jì)。 Abstract: The system of temperature measuring and controling is realized based on AT89C2051.The keyboard and display circuit is designed,which can be used for setting and modifying temperature value,resetting and displaying the present temperature value.At the same time the warning circuit is also designed in the system,which can deal with the alarm when temperature exceeds the upper limit and the lower limit.The hardware and software design of the system are explained．
上傳時(shí)間： 2013-11-18
上傳用戶：leehom61
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
介紹一種無極可調(diào)交流電子負(fù)載設(shè)計(jì)的新方法，由ATmega48單片機(jī)輸出PWM波，通過上位機(jī)設(shè)定不同的占空比控制場(chǎng)效應(yīng)管的通斷時(shí)間，即改變流過場(chǎng)效應(yīng)管的平均電流。根據(jù)電流的大小，可以等效為相應(yīng)的負(fù)載，并將采集的電流值顯示在上位機(jī)上。文中對(duì)該系統(tǒng)的軟﹑硬件設(shè)計(jì)思路作了詳細(xì)的分析，闡述了其設(shè)計(jì)原理。 Abstract: A new type electronic load is introduced.Due to ATmega48 microcomputer output PWM wave.The different duty is set ratio through PC to control FET turn-on time.We can equivalent homologous load according the current and display the current at PC.The hardware and software designing are analysed in detail. The principle is explained and the output is also given.
標(biāo)簽： ATmega 48 單片機(jī) 交流電子
上傳時(shí)間： 2013-11-23
上傳用戶：蟲蟲蟲蟲蟲蟲
對(duì)于傳統(tǒng)的跑步機(jī)無法聯(lián)機(jī)組網(wǎng)，保存歷史數(shù)據(jù)，實(shí)時(shí)調(diào)試等問題，介紹了一個(gè)由多臺(tái)跑步機(jī)通過RS-232串行總線與上位機(jī)相連組成的跑步機(jī)聯(lián)網(wǎng)系統(tǒng)。系統(tǒng)采用W77E58作為下位機(jī)核心控制器件，它具有雙串行通訊端口，其中一個(gè)串口用于與變頻器通訊，另一個(gè)串口則與上位機(jī)相連，構(gòu)成跑步機(jī)網(wǎng)絡(luò)。 Abstract: The traditional running machine can not be connected to a network, saving historical data, real time debug etc.In this paper,a new network system which is composed of running machines connected by a RS-232 communication bus is introduced.In the system,W77E58 is used as a core control unit.W77E58 has two serial ports,one is connected to the inverter and the other is connected to the PC. Thus a network appears.
標(biāo)簽： W77E58 跑步機(jī) 聯(lián)網(wǎng)系統(tǒng)
上傳時(shí)間： 2014-12-27
上傳用戶：哇哇哇哇哇
詳細(xì)介紹了TLC1549系列模數(shù)轉(zhuǎn)換器的特點(diǎn)及工作原理，然后根據(jù)TLC1549的工作時(shí)序和A/D轉(zhuǎn)換原理針對(duì)實(shí)際問題編寫了詳細(xì)的匯編語言程序。 Abstract: A basic principle and characteristic of TLC1549 analog-to-digital converter are introduced? detailedly in this article.Through engineering-oriented illustration,a microcomputer programmer base on basic principle and time sequence of TLC1549 is writted.
上傳時(shí)間： 2014-07-16
上傳用戶：blans
出了一種利用ATmega8單片機(jī)對(duì)ISD2500系列語音芯片進(jìn)行控制的智能語音系統(tǒng)，此系統(tǒng)使用靈活，易于功能升級(jí)，具有良好的應(yīng)用前景。提供了硬件連接電路和關(guān)鍵源程序。 Abstract: An intelligent voice system using ISD2500 series voice chips based on ATmega8 MCU is described.This system is flexible and easy to upgrade for users,and it has pretty good using foreground. The circuit diagram and the key program are also provided.
標(biāo)簽： ATmega8 2500 ISD 智能語音
上傳時(shí)間： 2014-01-22
上傳用戶：Artemis
對(duì)于瀝青混凝土攤鋪機(jī)自動(dòng)找平控制系統(tǒng)來說，數(shù)字式控制系統(tǒng)的研制是目前的一個(gè)方向。介紹了一種基于CAN總線的數(shù)字式自動(dòng)找平控制系統(tǒng)。該系統(tǒng)以CAN總線作為通信方式，PWM控制信號(hào)通過C8051F040單片機(jī)內(nèi)部PCA可編程計(jì)數(shù)器陣列產(chǎn)生，并具有結(jié)構(gòu)簡(jiǎn)單、信號(hào)穩(wěn)定、實(shí)時(shí)性強(qiáng)、易擴(kuò)展的特點(diǎn)。通過硬件實(shí)現(xiàn)和系統(tǒng)運(yùn)行達(dá)到了比較理想的控制效果，驗(yàn)證了系統(tǒng)的可行性。 Abstract: A digital auto-leveling control system based on CAN Bus is introduced.It uses CAN Bus as the method of communication and creates PWM signals by programmable counter array in C8051F040 microcontroller. The system is simple, stable, real-time and expansive.
標(biāo)簽： CAN 總線 數(shù)字式 控制系統(tǒng)設(shè)計(jì)
上傳時(shí)間： 2013-10-09
上傳用戶：ligi201200
以S3C825A為例介紹三星公司SAM8系列單片機(jī)的內(nèi)部結(jié)構(gòu)及其軟件開發(fā)環(huán)境，詳細(xì)描述采用混合編程法來對(duì)SAM8系列單片機(jī)進(jìn)行軟件設(shè)計(jì)的一般方法，最后給出用混合編程法對(duì)S3C825A進(jìn)行軟件設(shè)計(jì)的具體應(yīng)用實(shí)例。 Abstract: With S3C825A,this paper firstly introduces the SAM8 series single-chip microcontrollers and their software development environment, then introduces mixed programming technology for SAM8 series single-chip microcontrollers. In the end, the application program is also given.
標(biāo)簽： S3C825A SAM8 單片機(jī) 軟件設(shè)計(jì)
上傳時(shí)間： 2013-12-09
上傳用戶：ZZJ886
在需要實(shí)時(shí)大量輸入漢字的顯示控制處理應(yīng)用中，利用傳統(tǒng)單片機(jī)實(shí)現(xiàn)顯示控制的設(shè)計(jì)方法是較難實(shí)現(xiàn)的。帶漢字字庫(kù)的液晶模塊的使用使得小容量ROM單片機(jī)的大量漢字信息輸入與顯示成為可能。提出了針對(duì)漢字字庫(kù)編碼的二級(jí)索引拼音輸入檢索方法,介紹了以ST7920作為控制器的帶漢字字庫(kù)的液晶顯示模塊的接口方法及漢字顯示和控制原理，給出了通用計(jì)算機(jī)鍵盤在單片機(jī)中的串行接口，采用該技術(shù)可大大增強(qiáng)單片機(jī)的漢字輸入功能。為小容量ROM單片機(jī)的大批量漢字信息處理提供了一種漢字輸入解決方案。 Abstract: It is difficult to realize Chinese characters input method based on the embedded system by using the traditional design method of display control. It is possible to input and display Chinese characters based on the embedded system with the ROM of small content by using the LCD module with Chinese characters.Chinese characters input method of the quadric index recall in allusion to Chinese characters code is brought forward.The interface and the principle of Chinese characters display control based on the LCD module controlled with the ST7920 is introduced too.The serial interface of the computer keyboard in common use and the embedded system is given at the same time. It can enhance the embedded system function of Chinese characters input by using this technology, and provide a kind of Chinese characters input scheme for the embedded system with small capacity ROM.
上傳時(shí)間： 2013-11-19
上傳用戶：jhksyghr
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