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Diagnostics for mass flow control

A technology of flow controller and flow control system, which is applied in the direction of flow control, non-electric variable control, flow control using electric devices, etc., and can solve the problems of not being able to deal with a wide range of variable working conditions and affecting the probability of failure, etc.

Active Publication Date: 2011-01-12
ROSEMOUNT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Indirect techniques may also not be able to handle the reality of a wide range of variable operating conditions, which can seriously affect the probability of failure

Method used

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  • Diagnostics for mass flow control
  • Diagnostics for mass flow control
  • Diagnostics for mass flow control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] figure 1 is a block diagram of a flow control system 10 configured to generate diagnostic signals that are directly indicative of the operating condition of the flow controller. In this embodiment, a flow meter 10 includes a housing 11 , a flow sensor 12 , a valve controller 13 , and an electronics module 14 .

[0021] Housing 11 is typically made of a durable material, such as metal or durable plastic, or a combination of these materials. The housing includes mounting structures configured to secure internal components including flow sensor 12, valve controller 13, and electronics module 14, and to couple the flow sensor and valve controller to process equipment through which process fluid flows. The housing 11 also insulates the internal components, protecting them from adverse environmental conditions such as moisture and corrosive or explosive agents, and from contact with process machinery, tools, falling objects, and other potential hazards.

[0022] Flow sensor...

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PUM

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Abstract

A flow control system (10, 20) comprises a flow sensor (12), a valve controller (13), a signal processor (14, 16), a control processor (14, 16) and an interface (14, 17). The flow sensor (12) generates a sensor signal characterizing a flow rate. The valve controller (13) controls the flow rate as a function of a control output. The signal processor (14, 16) converts the sensor signal into a flow signal characterizing the flow rate as a function of time, and the control processor (14, 16) generates the control output as a function of a setpoint and the flow signals. The interface (14, 17) receives an input representative of the setpoint, transmits a flow output representative of the flow signals, and transmits a diagnostic output directly indicative of an operational condition of the flow control system (10, 20).

Description

technical field [0001] The present invention relates generally to fluid handling, and in particular to diagnostic techniques for flow control systems. Diagnostic techniques are directed to flow blockage, corrosion, wear and tear of electromechanical valve components, and other forms of electromechanical degradation or flow control impairment. Background technique [0002] Safe, accurate, and cost-effective flow control is critical to a host of industrial, engineering, and scientific processes. Mass-based flow control systems have significant applications in these fields, especially in applications such as semiconductor manufacturing and pharmaceutical manufacturing, where precise and absolute flow control is required. A major advantage of mass-based flow control systems is that they operate essentially independently of pressure and temperature effects, making such systems less susceptible to environmental biases and related system factors than are typical of other, more tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D7/06
CPCG01F5/00G01F15/005G05D7/0635G01F25/0007G01F1/6965G01F1/6847Y10T137/7722Y10T137/0318G01F25/10
Inventor 安尼斯·阿迈德
Owner ROSEMOUNT INC