產品概述: iso 40xx系列產品實現傳感器和主機之間的信號采集,用以檢測模擬信號或控制遠程設備。通過軟件的配置,可用于多種傳感器類型,包括:模擬信號輸入,模擬信號輸出,和數字信號輸入/輸出(i/o)。 iso 40xx系列產品可應用在 rs-232/485總線工業自動化控制系統,溫度信號測量、監視和控制,小信號的測量以及工業現場信號隔離及長線傳輸等等。產品包括電源隔離、信號隔離及線性化,a/d轉換和rs-485串行通信。每個串口最多可接256只 iso 40xx系列模塊,通訊方式采用ascii碼、modbus通訊協議,其指令集兼容于adam模塊,波特率可由代碼設置,能與其他廠家的控制模塊掛在同一rs-485總線上,便于計算機編程。
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。現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.