Unlock instant, AI-driven research and patent intelligence for your innovation.

Magnetic flowmeter capable of automatic selection of operating set point

A magnetic flowmeter and set-point technology, applied in the field of flow processing, can solve the problems such as the inability to determine the optimal set point in advance, the inability to use different coil inductance values ​​and resistance values, and the difficulty in determining the operating point for flow tubes and transmitters.

Active Publication Date: 2019-11-12
MICRO MOTION INC
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

New flowtubes, as well as design changes to existing models of flowtubes, may result in different coil inductance and resistance values ​​that were not available at the time the particular transmitter was manufactured
[0011] Therefore, it is difficult to determine the proper duty point for a particular flow tube and transmitter combination
Optimal set points for operating current and frequency universally cannot be determined in advance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Magnetic flowmeter capable of automatic selection of operating set point
  • Magnetic flowmeter capable of automatic selection of operating set point
  • Magnetic flowmeter capable of automatic selection of operating set point

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] figure 1 An example magnetic flowmeter 10 is shown comprising a primary section (flow tube or sensor) 10A and a secondary section (transmitter) 10B. Flow tube 10A includes tubing 12, insulating liner 14, electrodes 16A and 16B, and field coil 18 formed from series coils 18A and 18B.

[0017] The primary function of flow tube 10A is to generate a voltage proportional to the velocity of the fluid being measured. The coils 18A and 18B are energized by passing current through the coils 18A and 18B to form a magnetic field. In a pulsed DC magnetic flowmeter, the direction of the coil drive current is periodically reversed so that the magnetic field generated by field coils 18A and 18B changes direction. Process fluid flowing through the interior of flow conduit 10A acts as a moving conductor so that the magnetic field induces a voltage in the fluid. Flush mounted electrodes 16A, 16B inside flow tube 10A are in direct electrical contact with the conductive process fluid, t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A magnetic flowmeter comprising: a flow tube having electrodes and a field coil; and a transmitter based on sensed coil inductance, sensed coil resistance, transmitter and / or flow tube power rating, and selected Qualitative performance criteria to automatically determine the operating set point of the magnetic flowmeter.

Description

technical field [0001] The present invention relates generally to stream processing, and in particular to a magnetic flowmeter. Background technique [0002] Magnetic flowmeters (or magmeters) measure flow through Faraday induction (the electromagnetic effect). A magnetic flowmeter typically consists of a flow tube and a transmitter. A flow tube includes: a tube; a field coil (which may include a plurality of coils) mounted on the tube; and electrodes extending through the tube. The transmitter supplies power to the field coils to generate a magnetic field across the pipe section, which induces an electromotive force (EMF) across the process flow. The resulting potential difference (or voltage) is sensed using a pair of electrodes extending through the pipe section and in contact with the process flow, or by capacitive coupling. The flow rate is proportional to the sensed EMF, and the volumetric flow rate is proportional to the flow rate and the flow cross-sectional area....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01F1/58G01F1/60G16Z99/00
CPCG01F1/60G06F17/40G16Z99/00G01F25/10G01F1/584G05B13/00G01F1/58G01D21/00
Inventor 布鲁斯·D·罗夫那尔斯科特·罗纳德·房斯史蒂文·B·罗杰斯
Owner MICRO MOTION INC