110.240.6510
发布时间:2019-05-09 09:15:53点击率:
110.240.6510
110.240.6510
110.240.6510
水质监测是监视和测定水体中污染物的种类、各类污染物的浓度及变化趋势,评价水质状况的过程。监测范围十分广泛,包括未被污染和已受污染的天然水(江、河、湖、海和地下水)及各种各样的工业排水等。主要监测项目可分为两大类:一类是反映水质状况的综合指标,如温度、色度、浊度、pH值、电导率、悬浮物、溶解氧、化学需氧量和生物需氧量等;另一类是一些有毒物质,如酚、氰、砷、铅、铬、镉、汞和有机农药等。为客观的评价江河和海洋水质的状况,除上述监测项目外,有时需进行流速和流量的测定。 对于底层自动化控制系统,通过现场的各种自动化仪表采集数据,通过PLC控制系统的动作。来完成周期性的数据采集。把数据保存到现场工控机的数据库中,通过通讯程序将数据按要求发送到服务器,以各种形式展现给上层管理者。 在此以紫金桥组态软件为例,简述现场自动化系统中软件如何完成上位机与下位PLC及各种测量仪器的配合,以实现关键数据的采集。 二、系统功能 工艺流程图:现场设备,管路结构图。整个系统一般4小时运行一次(下限可设置到2小时),各水管中的颜色在运行中会发生变化,以指示运行到哪个阶段。各模拟设备上显示着参数的实时数据。 当某个环节出现故障,或者参数超标时,系统会发生报警,报警灯闪烁。在画面的右下角,也显示着系统当前的运行状态。
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