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Process device diagnostics using process variable sensor signal

A technology of sensor signals and process variables, applied in measurement devices, mass flow measurement devices, signal transmission systems, etc., can solve problems such as inaccuracy and time-consuming

Active Publication Date: 2006-07-05
ROSEMOUNT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is thus a need for improved diagnostic techniques that do not rely on additional components in the control unit, or the inaccurate and time-consuming manual testing of the prior art to separate and evaluate vibration noise signals

Method used

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  • Process device diagnostics using process variable sensor signal
  • Process device diagnostics using process variable sensor signal
  • Process device diagnostics using process variable sensor signal

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Embodiment Construction

[0016] In FIG. 1 , a typical environment for a diagnostic device according to one embodiment of the present invention is shown at 100 . In FIG. 1 , a diagnostic device such as a process transmitter 102 configured as a pressure transmitter is shown connected to a control system 104 . Process transmitters can be configured to sense one or more processes associated with fluids in process plants such as slurries, liquids, steam and gases in chemical, pulp, petroleum, gas, pharmaceutical, food and other fluid processing plants variable. The monitored process variable may be pressure, flow, water level, temperature, or other property of the fluid. A vibration sensitive process variable sensor is one that can sense vibrations carried by a process fluid, such as a pressure sensor, a sensor in a Coriolis flow meter, an electrode in a magnetic flow meter, a vortex or ultrasonic flow meter, or other sensors. A process transmitter includes one or more sensors, which may be internal to ...

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PUM

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Abstract

A diagnostic device for use in a process control system receives a sensor signal (146) related to a process variable of a process sensed by a process variable sensor (132). A signal preprocessor (150) provides a sensor power signal output as a function of a frequency distribution of power in the sensor signal. A process condition is determined based upon the sensor power signal.

Description

technical field [0001] The present invention relates to diagnostics of process plants (for industrial processes). In particular, the present invention relates to process diagnostics using process variable sensor signals. Background technique [0002] Process control devices are used in industrial process control systems to control processes. Control devices are field devices used to control a process and include pumps, valves, actuators, solenoids, motors, mixers, agitators, circuit breakers, crushers, rollers, presses, ball mills, dough kneaders Machines, blenders, filters, cyclones, centrifugal separators, towers, dryers, conveyors, separators, elevators, winches, heaters, coolers or others. The valve controller includes a valve actuator coupled to the valve for controlling the control flow of process fluid. Pump controllers include motor controllers or actuators connected to the pump. Diagnostics of process control devices can be used to identify failed control device...

Claims

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Application Information

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IPC IPC(8): G05B23/02G07C3/00G05B9/02G01D21/02G01F1/32G01F1/60G01F1/84G01F25/00G01K15/00G05B9/03G08C19/02
CPCG01K15/00G01F1/3209G05B23/0221G01F1/8477G05B23/024G07C3/00G01F25/0007G01F1/60G08C19/02G05B9/03G01F25/10
Inventor 埃夫伦·埃尔于雷克卡德·卡瓦科尼奥格鲁斯蒂芬·R·埃斯博德特
Owner ROSEMOUNT INC