介紹一種基于單片機的多路溫度采集及監控系統,能夠測量6路溫度信號,具有計算機聯網功能,各測量點可以單獨監控和設置,可根據用戶的需求自動控制。測量溫度范圍為-10 ℃~200 ℃,控制方式采用模擬量調壓模式。該系統具有控制精度高、沖擊小等特點。 Abstract: A temperature collecting and surveillance-controlling system based on sing-chip microcomputer is introduced. It can measure 6 channel signal of the temperature,and it has a function of network connection.The temperature measure points can be monitored and located, it can be controlled automatic according to user’s demand.The temperature range is -10℃ to 200℃.The model of control is adjustable voltage with simulation. It features high precision and little impact.
上傳時間: 2013-10-23
上傳用戶:bjgaofei
介紹了CAN總線和P87C591單片機的特點,給出了基于P87C591單片機的信號采集節點的軟、硬件設計,指出了硬件電路設計中應注意的問題,在軟件設計中重點介紹了節點初始化、報文發送和報文接收等子程序。 Abstract: The features of CAN Bus and the microcontroller P87C591 are introduced, and the design of hardware circuit and soft configuration of the signals collection node based on P87C591 are presented. The problems in designing hardware circuit are discussed.Initialization subprogram, transmiting subprogram and receiving subprogram are emphasized in soft configuration.
上傳時間: 2013-11-03
上傳用戶:BIBI
為解決輸油管道溫度壓力參數實時監測的問題,設計了以C8051F930單片機作為控制核心的超低功耗輸油管道溫度壓力遠程監測系統?,F場儀表使用高精度電橋采集數據,通過433 MHz短距離無線通信網絡與遠程終端RTU進行通信,RTU通過GPRS網絡與PC上位機進行遠程數據傳輸,在上位機中實現數據存儲和圖形化界面顯示,從而實現輸油管道溫度壓力參數的實時監測和異常報警。經實驗證明,該系統的12位數據采集精度滿足設計要求,漏碼率小于1%,正常工作時間超過5個月,能實時有效地監測輸油管道的溫度壓力參數,節省大量人工成本,有效預防管道參數異常造成的經濟損失和環境污染。 Abstract: In order to solve the problems on real-time monitoring of pipeline temperature and pressure parameters, the ultra-low power remote pipeline temperature and pressure monitoring system was designed by using the single chip processor C8051F930 as the control core. The high-precision electric bridge was used in field instruments for data collection, the 433MHz short-range wireless communication network was used to make communication between field instrument and RTU, the GPRS was used by the RTU to transmit data to the PC host computer, and the data was stored and displayed in the PC host computer, so the real-time monitoring and exception alerts of pipeline temperature and pressure parameters were achieved. The experiment proves that the system of which error rate is less than 1% over five months working with the 12-bit data acquisition accuracy can effectively monitor the pipeline temperature and pressure parameters in real time, it saves a lot of labor costs and effectively prevents environmental pollution and economic losses caused by abnormal channel parameters.
上傳時間: 2013-11-07
上傳用戶:cuibaigao
針對當前安檢力學試驗機所能完成的試驗種類單一、自動化程度低等問題,提出一種以ATmega128單片機為核心控制器的安檢力學試驗機的設計。詳細闡述了該安檢力學試驗機各個組成部分的設計原理和方案,并且給出了各部分的軟件設計思想和操作流程。經過大量測試試驗表明:設計的安檢力學試驗機可以完成多達十余種的力學安檢試驗,完全符合相關國家標準,并且具有數據采集精度高、傳輸速度快、操作安全簡便等特點,實現了安檢設備的多功能化、數字化和自動化。 Abstract: Currently, many mechanical security testing machines have only one function. The degree of automation of them is low. To solve those problems, a new kind of mechanical security testing machine, using ATmega128 micro-controller as its core controller, has been advanced. It describes the components of the machine. The principles and the scheme in the designing processes are presented in detail, and the software architecture and the operation processes of each part are given. After having done many testing, we have reached the following conclusions: the mechanical security testing machine presented can do over ten mechanical security tests complying with related national standards. It has high data acquisition accuracy and high transmission speed. The operation of the machine is simple and safe. In general, this machine is a multi-functional, highly automatic, digitalized security testing device.
上傳時間: 2013-11-05
上傳用戶:a67818601
本文對激光掃描車身坐標測量系統的數據采集部分進行了深入研究,設計了基于“AVR+FIFO+CPLD”的數據采集及處理模塊;解決了當多路信號有數據同時傳輸時,如何將數據完整地寫入FIFO的問題,實現了數據的有效采集;編寫了完整的CPLD控制程序和AVR數據采集程序,為準確測量待測點的坐標提供了可靠的數據來源。
上傳時間: 2013-10-29
上傳用戶:asaqq
具有PCI總線等接口形式的采集卡雖然傳輸速率高,但安裝麻煩,易受PC機插槽數量、地址、中斷資源的限制。為了解決以上問題,設計了基于ISP1581的高速USB接口的多通道數據采集系統,介紹了系統硬件組成以及軟件程序的開發過程。經驗證,系統最高傳輸速率可達60 Mb/s。
上傳時間: 2013-10-31
上傳用戶:ANRAN
[摘要]系統主要分為兩大部分:上位機通過測控管理軟件實現對多個庫房溫度數據的巡回采集、處理、實時顯示和控制系統的管理;下位機通過,!-單片機控制各個測溫點完成溫度轉換、發送能調信號并與上位機實現多機通信。此外,各下位機還具有獨立顯示溫度的功能,避免因通信網絡故障而造成整個系統的癱瘓。[關鍵詞:PIC單片機;冷庫;溫度測控
上傳時間: 2013-10-18
上傳用戶:molo
摘要:設計了基于單片機的罐道傾角數據采集系統,介紹了系統的構成、工作原理和流程圖,給出了單片機AT89S52與外圍器件的硬件接口電路。使用匯編語言和VisualBasic設計了PC機與單片機間的串行通信程序,并提出了數據趨勢曲線的繪制方法。設計的數據采集系統具有易實現、易編程、可移植、體積小、功耗低等優點。關鍵詞:單片機;數據采集系統;罐道傾角;串行通信;VB
上傳時間: 2013-11-19
上傳用戶:012345
摘要:介紹了一種由ADS8364與LPC2000系列單片機構成的數據采集系統.對ADS8364的工作原理進行了介紹,并給出了其與LPC2292單片機之間的引腳連接圖,重點闡述了如何采集旋轉變壓器信號.最后說明了數據采集系統的軟件實現過程.
上傳時間: 2013-11-07
上傳用戶:wxnumen
在單片機應用系統中,有時需要采集大量的開關信號,由于信號多且接入方式不同,使得電路較復雜,占用了單片機大量資源,數據采集軟件的開發量也較大。筆者用純數字電路設計了一個特別適合于遠程大數據量采集的電路(最大可采集1024個開關量,附圖所示電路可采集192個開關量)。 電路由雙二進制加法計數器CD4520、譯碼器74LS138、緩沖驅動器74LS244等組成。NE555產生的脈沖加到計數器D1的CP1端,由于D1的Q4同時也接D1的EN2,所以D1的雙計數器構成級聯計數電路,其輸出Q2~Q7作為開關輸入量的地址送D5的輸入端。Q1作為片選信號接D5,Q5~Q7接D2輸入端,為D3、D4等譯碼器提供片選信號,而Q2~Q4接D3、D4等譯碼器的輸入端,譯碼器的輸出作為D7、D8等的片選信號。D7、D8等的輸入接采樣的開關信號(圖中開關接通表示輸入為低位),其輸出接D6輸入端。當D6片選有效時(Q1為低電位),輸出的數據地址線上為開關量信號。當D5片選有效時(Q1為高電位)輸出的數據地址線上為開關量信號的地址。8條數據地址線可直接接單片機P1口或通過74LS245接單片機總線,1條數據地址選擇線也可直接接單片機P2或P3口。
上傳時間: 2013-10-14
上傳用戶:tonyshao