Detecting blockage in process connections of differential pressure transmitters
Detecting blockage in process connections of differential pressure transmitters
复制标题
检测差压变送器过程连接中的堵塞
DOI：
10.1109/sice.1995.526976
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
H. Kuwayama
中科院分区：
文献类型：
--
作者：
E. Taya;H. Kuwayama
本文介绍了差压变送器过程连接中堵塞检测方法的研究结果。孔板和差压变送器的组合由于其简单性而广泛用于过程工业中的流量测量。然而，该方法的一个问题是DP变送器的过程连接容易被凝结的流体或来自流体的杂质的积聚堵塞。目前，当工厂操作员观察到异常输出信号时，他们根据自己的经验和直觉推断过程连接堵塞。如果能够在变送器输出信号变得异常之前检测到阻塞，则将改善工厂控制。通常，过程压力的波动“噪声”分量通过变送器的信号处理电路中的低通滤波器去除。然而，我们发现这种“噪音”可以用来检测过程连接的阻塞。
This paper presents the results of a study of methods for detecting blockage in process connections of differential pressure transmitters. Due to its simplicity, the combination of an orifice plate and differential pressure transmitter is widely used for flow measurement in process industries. However, one problem with this method is that the process connection of the DP transmitter is easily blocked by congealed fluid, or by accumulations of impurities from the fluid. At present, plant operators deduce that there is a blockage of the process connection based on their experience and intuition, when they observe abnormal output signals. If a blockage could be detected before the transmitter output signals become abnormal, it would improve the plant control. Usually the fluctuating "noise" component of process pressure is removed by a low-pass filter in the signal processing circuits of the transmitter. However, we found that this "noise" could be used to detect blockage of the process connection.