智能電表、水表、煤/燃氣表、熱量表等大量地出現(xiàn)在人們的生活中,同時這些儀表的抄錄工作變得越來越煩瑣,工作量大,工作效率低,不僅給用戶帶來不便,而且會存在漏抄、誤抄、估抄的現(xiàn)象。隨著電子技術、通信技術和計算機技術的飛速發(fā)展,人工抄表已經(jīng)逐步被自動抄表所代替。 集中器是一個數(shù)據(jù)集中處理器,是多對象自動抄表系統(tǒng)的通信橋梁,負責對各智能表的數(shù)據(jù)進行采集、存儲和管理,及時有效地向上位機傳輸數(shù)據(jù)并執(zhí)行上位機發(fā)送的指令。提高多對象集中器數(shù)據(jù)處理能力,有效完成上下行通信是多對象自動抄表系統(tǒng)AMRS(Automation Meter Reading System)目前需要解決的關鍵問題。 本文針對多對象集中器這樣一個較復雜的通信與控制系統(tǒng),提出采用32位的高性能嵌入式微處理器。32位ARM9微處理器處理速度快、硬件性能高、低功耗、低成本,集成了相當多的硬件資源,硬件的擴展和設計大大簡化,ARM9(S3C2410)為工業(yè)級芯片,抗干擾能力強,能夠適應運行現(xiàn)場的較惡劣環(huán)境,8/16位微控制器運算能力有限,對于較復雜的通信與控制算法難以順利完成;硬件平臺依賴性強,不利于軟件的開發(fā)、升級與移植;在缺乏多任務調度機制的情況下,應用軟件不僅實現(xiàn)難度大,且可靠性難以保證。 本文首先對多對象遠程抄表系統(tǒng)的總體結構進行研究,主要研究了多對象遠程抄表系統(tǒng)中集中器的軟件和硬件實現(xiàn),對硬件資源進行了外圍擴展,對S3C2410微處理器芯片的外圍硬件進行了擴展設計,使之具備了滿足使用需求的最小系統(tǒng)硬件資源,包括時鐘、復位、電源、外圍存儲、LCD、RS-485通信模塊、CAN通信模塊等電路設計。實時時鐘為多對象集中器定時抄表提供時間標準;電源電路為多對象集中器系統(tǒng)提供穩(wěn)定電源;看門狗電路的設計保證多對象集中器系統(tǒng)可靠運行,防止系統(tǒng)死機;數(shù)據(jù)存儲器主要用于存儲參數(shù)、變量、集中器自身的參數(shù),負責智能表的參數(shù)以及智能表用量等。上行通道即多對象集中器與上位機之間的通信線路,采用CAN現(xiàn)場總線進行通信;下行通道即多對象集中器與智能表之間的通信,采用RS-485總線進行通信。軟件設計上,主要針對多對象集中器的數(shù)據(jù)存儲功能和串行通訊功能進行程序編寫。基于ARM的多對象遠程抄表系統(tǒng)集中器可以實現(xiàn)多對象遠程抄表,提高了數(shù)據(jù)處理能力,有效完成了上下行通信,可靠性強,穩(wěn)定性高,結構簡單。
標簽: ARM 對象 遠程抄表系統(tǒng) 集中器
上傳時間: 2013-06-07
上傳用戶:heminhao
基于單片機的頻率計的實現(xiàn)和protuse仿真-Frequency Meter based on single chip implementation and protuse simulation
上傳時間: 2013-06-04
上傳用戶:杜瑩12345
·詳細說明:使用TI的TMS320VC5402 DSP實現(xiàn)。DTMF的撥號采用實驗儀的鍵盤輸入,解碼后在液晶屏上顯示- Uses TI TMS320VC5402 DSP to realize. The DTMF digit dialing uses tests the Meter the keyboard entry, after the decoding demonstrated on the l
上傳時間: 2013-07-25
上傳用戶:哇哇哇哇哇
Abstract: The rapid build out of today's smart grid raises a number of security questions. In this article,we review two recent well-documented security breaches and a report of a security gap. These situationsinclude a 2009 smart-Meter hack in Puerto Rico; a 2012 password discovery in grid distributionequipment; and insecure storage of a private key in distribution automation equipment. For each of theseattacks, we examine the breach, the potential threat, and secure silicon methods that, as part of acomplete security strategy, can help thwart the attacks.
標簽: 智能電網(wǎng) 安全性
上傳時間: 2013-10-27
上傳用戶:tecman
為解決我國水位監(jiān)測野外條件下長期無人看守的問題,研制開發(fā)了基于MSP430單片機的智能水位計。從其組成到各功能分別進行了詳細的介紹,該智能水位計不僅實現(xiàn)了水位數(shù)據(jù)的實時監(jiān)測、記錄和定期采集等多種工作模式,而且提高了水位監(jiān)測精度,實現(xiàn)了水位監(jiān)測的智能化。 Abstract: In order to solve the problems of long-term unmanned observation in the field water monitoring,an intelligence water-level Meter based on MSP430 is developed composition and every function moduce of the water level Meter was introduced in detail. It not only realizes water level data collection and storage, regularly gathering and so on, but also improves the water-level precision , finally realizes the intelligence.
上傳時間: 2013-11-17
上傳用戶:417313137
針對目前采用的熱敏電阻測量方法,提出了采用單總線數(shù)字式溫度傳感器DS18B20和單片機組成的新型溫度測量儀。介紹DS18B20的結構和工作原理,以及單總線工作原理,給出了由Mega8單片機和DS18B20構成的單總線溫度測量儀的硬件電路及軟件流程圖。經(jīng)試驗基于單總線器件DS18B20的溫度測量儀,具有測量準確、測溫范圍寬、體積小、控制方便等優(yōu)點。 Abstract: This paper brings forward a new temperature Meter composed of 1-Wire temperature sensor DS18B20 and MCU which has advantage of the thermistor. In the article, the DS18B20's structure and controlling principles are introduced and hardware circuit and software diagram of the temperature Meter are given.After been tested,the temperature Meter has the advantages of accurate measurement, wide temperature range, small volume and convenient controlling.
上傳時間: 2013-10-31
上傳用戶:hzy5825468
基于單片機控制的二氧化碳濃度測試計:基于CDM4161二氧化碳氣體濃度測試模塊以及ATtiny26單片機,提出了一種二氧化碳濃度測試計的設計方案。該方案具有硬件電路簡單、成本低、可靠性高、測量準確等優(yōu)點,具有較高的實用價值。 Abstract: Abstract:A desigh scheme of CO2 concentration Meter based on CDM4161carbon dioxide concentration test module and ATtiny26micro-controller is presented in this paper.The design scheme features simple hardware circuit,low-cost,high reli-ability,accurate measurement and it has a high practical value.
上傳時間: 2013-11-14
上傳用戶:zjwangyichao
The Maxim Integrated 71M6541-DB REV 3.0 Demo Board is a demonstration board for evaluating the 71M6541 device for single-phase electronic energy Metering applications in conjunction with the Remote Sensor Inter-face. It incorporates a 71M6541 integrated circuit, a 71M6601 Remote Interface IC, peripheral circuitry such as a serial EEPROM, emulator port, and on-board power supply. A serial to USB converter allows communication to a PC through a USB port. The Demo Board allows the evaluation of the 71M6541 energy Meter chip for measurement accuracy and overall system use.
上傳時間: 2013-11-06
上傳用戶:雨出驚人love
Make and answer phone calls Detect tone and pulse digit from the phone line Capture Caller ID Support blind transfer, single-step transfer/conference, consultation transfer/conference, hold, unhold. Control of the local phone handset, microphone and speaker of the modem Send and receive faxes Play and record on the phone line or sound card Play music in background mode Silence detection VU Meter Wave sound editor that allows your end-users to edit their own sound files. Voice recognition and voice synthesis. Full control over the serial port device ZModem file transfer utility File compression and encryption utility
上傳時間: 2013-11-30
上傳用戶:水中浮云
M16C/6S 群是采用64 管腳的塑模LQFP 封裝的單片機。該群將電力線通信調制解調器內(nèi)核(利用了Yitran Communications Ltd公司開發(fā)的IT800PLC調制解調器技術)和模擬前端進行了單芯片化。M16C/60系列CPU內(nèi) 核實現(xiàn)了高級別的編碼效率和高速運算處理,而且,內(nèi)置的IT800調制解調器內(nèi)核還采用了Yitran公司的DCSK (Differential Code Shift Keying)擴頻調制方式的專利技術,可在已有的電氣配線上實現(xiàn)速度最大為7.5kbps的高 可靠性的通信。M16C/6S符合國際標準(FCC part 15, ARIB and CENELEC bands),最適合用于AMR(Automatic Meter Reading)或家庭自動化控制系統(tǒng)等各種窄帶的應用程序。
標簽: Communications Yitran LQFP 800
上傳時間: 2014-08-08
上傳用戶:xaijhqx