公开(公告)号：US20150323357A1

公开(公告)日：2015-11-12

申请号：US14493699

申请日：2014-09-23

Applicant: Rosemount Inc.

Inventor： Jeffry Duane Foster ,  Michael D. Anderson

IPC: G01F1/34 ,  G01F1/56

CPC classification number: G01F1/34 ,  E21B43/34 ,  G01F1/32 ,  G01F1/329 ,  G01F1/56 ,  G01F1/74 ,  G01F15/08

Abstract: A flowmeter includes a process sensor assembly providing a sensor signal and a filter stage comprising a low pass filter and a high pass filter and providing a filtered signal from the sensor signal. A processor determines that a filtered signal is indicative of a low flow condition for a first fluid, alters at least one parameter of the low pass filter and at least one parameter of the high pass filter in response to the low flow condition such that the filter stage provides a new filtered signal, determines that the new filtered signal is not indicative of a low flow condition for a second fluid and generates an alarm in response to the new filtered signal not being indicative of a low flow condition for the second fluid.

Abstract translation: 流量计包括提供传感器信号的过程传感器组件和包括低通滤波器和高通滤波器并且从传感器信号提供滤波信号的滤波器级。 处理器确定滤波后的信号指示第一流体的低流量条件，响应于低流量条件改变低通滤波器的至少一个参数和高通滤波器的至少一个参数，使得滤波器 阶段提供新的滤波信号，确定新的滤波信号不指示第二流体的低流量条件，并且响应于新的滤波信号而不是指示第二流体的低流量条件而产生报警。

公开(公告)号：US09341505B2

公开(公告)日：2016-05-17

申请号：US14493699

申请日：2014-09-23

Applicant: Rosemount Inc.

Inventor： Jeffry Duane Foster ,  Michael D. Anderson

IPC: G01F1/00 ,  G01F1/34 ,  G01F1/56 ,  E21B43/34 ,  G01F1/32 ,  G01F1/74 ,  G01F15/08

CPC classification number: G01F1/34 ,  E21B43/34 ,  G01F1/32 ,  G01F1/329 ,  G01F1/56 ,  G01F1/74 ,  G01F15/08

Abstract: A flowmeter includes a process sensor assembly providing a sensor signal and a filter stage comprising a low pass filter and a high pass filter and providing a filtered signal from the sensor signal. A processor determines that a filtered signal is indicative of a low flow condition for a first fluid, alters at least one parameter of the low pass filter and at least one parameter of the high pass filter in response to the low flow condition such that the filter stage provides a new filtered signal, determines that the new filtered signal is not indicative of a low flow condition for a second fluid and generates an alarm in response to the new filtered signal not being indicative of a low flow condition for the second fluid.

Abstract translation: 流量计包括提供传感器信号的过程传感器组件和包括低通滤波器和高通滤波器并且从传感器信号提供滤波信号的滤波器级。 处理器确定滤波后的信号指示第一流体的低流量条件，响应于低流量条件改变低通滤波器的至少一个参数和高通滤波器的至少一个参数，使得滤波器 阶段提供新的滤波信号，确定新的滤波信号不指示第二流体的低流量条件，并且响应于新的滤波信号而不是指示第二流体的低流量条件而产生报警。