摘 要: 閥門開度儀以AT89C51單片機為核心, 通過在閥門電機軸上安裝的電位計傳感器獲得閥 門電機軸的轉動角位移, 從而得出閥門的開度, 達到自動檢測的目的。詳細介紹了串行控制的10 位A /D轉換器TLC1549的特點和功能, 說明了TLC1549與AT89C51單片機在閥門開度儀中的硬件 電路和軟件程序。實踐證明, 該閥門開度儀數據采集準確可靠、工作穩定。 關鍵詞: TLC1549; AT89C51單片機; 閥門開度
上傳時間: 2013-10-14
上傳用戶:行者Xin
摘要:為了解決信號采集系統的同步串行通訊問題,在理解AVR 單片機SPI接口的通訊原 理和方法的基礎上,分析了AVR 單片機SPI接口的工作過程,設計了AVR單片機和串行A/ D轉換器的同步串行通訊接口,并用程序描述了SPI接口通訊的過程,實現了AVR單片機 通過SPI接口與串行A/D轉換器之間的數據通訊。最后,用實驗和數據分析驗證了設計方 案的可行性。 關鍵詞:SPI接口;AVR單片機;串行A/D
上傳時間: 2013-10-31
上傳用戶:lilei900512
以C8051F020為核心處理器,設計無線傳感器網絡數據采集系統。系統采用SZ05-ADV型無線通訊模塊組建Zigbee無線網絡,結合嵌入式系統的軟硬件技術,完成終端節點的8路傳感器信號的數據采集。現場8路信號通過前端處理后,分別送入C8051F020的12位A/D轉換器進行轉換。經過精確處理、存儲后的現場數據,通過Zigbee無線網絡傳送到上位機,系統可達到汽車試驗中無線測試的目的。 Abstract: This paper designs a wireless sensor network system for data acquisition with C8051F020 as core processors.The system used SZ05-ADV wireless communication module,set up a Zigbee wireless network, combined with hardware and software technologies of embedded systems,completed the end-node 8-locale sensor signal data acquisition.Eight locale signals were sent separately into the 12-bit ADC of C8051F020 for conversion through front treatment.After accurate processing and storage,the locale data was transmitted to the host computer through Zigbee wireless.The system achieves the purpose of wireless testing in vehicle trial.
標簽: C8051F020 Zigbee 汽車測試 系統設計
上傳時間: 2013-11-23
上傳用戶:dsgkjgkjg
數字信號處理器dsPIC33F集多通道高精度A/D轉換、多通訊模式、看門狗、CMOS Flash技術等于一體,其內部可完成所有數據操作,實現總線不出芯片技術。將該處理器應用于微機保護裝置,提出基于dsPIC33F微處理器的微機保護裝置的設計方案,給出相應的接口電路與軟件流程。該設計方案結構簡單,性價比及可靠性高,開發周期短,具有一定的實用推廣價值。所研制的微機保護裝置現場運行效果良好。 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.
上傳時間: 2013-11-16
上傳用戶:開懷常笑
以89S52單片機和EP1C6Q240C8型FPGA為控制核心的多功能計數器,是由峰值檢波、A/D轉換、程控放大、比較整形、移相網絡部分組成,可實現測量正弦信號的頻率、周期和相位差的功能。多功能計數器采用等精度的測量方法,可實現頻率為1Hz~10MHz、幅度為0.01~5Vrms的正弦信號的精確測頻,以及頻率為10Hz~100kHz、幅度為0.5~5Vrms的正弦信號精確測相。液晶顯示器能夠實時顯示當前信號的頻率、周期和相位差。該多功能計數器精度高,界面友好,實用性強。 Abstract: A multi-function counter,which uses89S52MCU and EP1C6Q240C8FPGA as a control core,consists of peak detector,A/D conversion,program-controlled amplification,compared shaping and phase-shifting network part.The counter measures the frequency,period and phase of sinusoidal signal.With the equal precision method,the multi-function counter achieves the precise frequency measurement of the sinusoidal signal which its frequency is from1Hz to10MHz,its amplitude is from0.01Vrms to5Vrms,as well as the accurate phase measurement of the sinusoidal signal which its frequency is from10Hz to100kHz,its amplitude is from0.5Vrms to5Vrms.The LCD monitor real-time displays the frequency,period and phase difference of current signal.The multi-function counter features high precision,friendly interface,and strong practical.
上傳時間: 2013-11-15
上傳用戶:gy592333
介紹了一種基于C8051F020單片機的多路壓力測量儀。該測量儀選用電阻應變式壓力傳感器采集壓力信號,并經放大電路處理后送入C8051F020單片機,再由C8051F020單片機內部的A/D轉換器將采集到的壓力信號進行模數轉化,然后分別對數據進行存儲和顯示。該測量儀能測量6路壓力信號,并且各測量點都能單獨檢測和設置。由于采用了C8051F020單片機,簡化了硬件電路,增強了抗干擾能力,使得測量儀具有測量精度高,沖擊小等特點。 Abstract: A measurement apparatus for multi-channel pressure based on single chip microcomputer is introduced.It can measure 6 channels signal of the pressure,and the pressure measure points can be detection and located individually.The pressure signal sampling is obtained by resistor stress-type pressure sensors,the digital signals of 6 channels are collected through amplifying and adjustment circuit of pressure signals and internal integrated A/D converter of MCU.Finally,and it realizes the function to store and display data separately.C8051F020 was used to made hardware circuit simple,and it also enhanced the anti-interference ability.It features high precision and little impact.
上傳時間: 2013-11-16
上傳用戶:yare
概述 HT46x23是8位高性能精簡指令集單片機,專門為多輸入/輸出口的產品而設計的.特別適合應用于像洗衣機控制器和家用電器類產品.其HALT功能可降低功耗.
上傳時間: 2013-11-23
上傳用戶:392210346
前言 自從盛群半導體公司成立以來,即致力于單片機產品的設計與開發。雖然盛群半導體提供給客戶各式各樣的半導體器件,但其中單片機仍是盛群的主要關鍵產品,未來盛群半導體仍將繼續擴展單片機產品系列完整性與功能性。通過長期累積的單片機研發經驗與技術,盛群半導體能為各式各樣的應用范圍開發出高性能且低價位的單片機芯片。許多連接到外部感應器的重要應用需要處理模擬信號,所有的這些應用,在它們可以被單片機處理之前需要通過一個A/D轉換器做模數信號的轉換。為了滿足這些需求,盛群開發出A/D系列的單片機,除了擁有I/O系列的所有特性和功能外,還含有集成的多通道A/D轉換器,它的解析度和通道個數可調。而PWM功能和I2C接口,則進一步增加了A/D系列單片機的功能和應用的可行性。
上傳時間: 2013-12-05
上傳用戶:waitingfy
在工作控制和智能化儀表中,通常由微型計算機進行實時控制及實時數據處理。計算機所加工的信息總是數字量,而被控制或測量對象的有關參量往往是連續變化的模擬量,如溫度、速度、壓力等等,與此對應的電信號是模擬電信號。計算機要處理這種信號,首先必須將模擬量轉換成數字量,這一轉換過程就是“模/數轉換(A/D)”
上傳時間: 2013-10-24
上傳用戶:tzl1975
Mega16是一款采用先進RISC精簡指令,內置A/D的8位單片機,可支持低電壓聯機 Flash和EEPROM 寫入功能;同時還支持 Basic和C 等高級語言編程。用它設計電子時鐘不僅成本低,硬件簡單,而且很容易實現系統移植。介紹了如何利用AVR系列單片機Mega16及1602字符液晶來設計電子時鐘的方法,同時給出了相應的電路原理及部分語言程序。 Abstract: ?Mega16 is a high-performance, low power consumption, the use of advanced RISC concise instructions, built-in A/D 8-bit microcontrollers, the on-line support for low-voltage Flash, EEPROM write function. Except Mega16 also support the Basic, C, and other high-level language programming.The electronic clock which is deisgned by Mega16 is not only low-cost, simple hardware, but easy to achieve system migration.The design method of electrioic clock based on the AVR Mega16 and character LCD1602 is introduced in this paper,and the corresponding circuit electrionic and some language program are given.
上傳時間: 2014-12-27
上傳用戶:zl5712176