Method of operating an electromagnetic flowmeter
USRE45447E · US · E1
| Field | Value |
|---|---|
| Publication number | US-RE45447-E |
| Application number | US-25523605-A |
| Country | US |
| Kind code | E1 |
| Filing date | Oct 21, 2005 |
| Priority date | Jul 9, 2001 |
| Publication date | Apr 7, 2015 |
| Grant date | Apr 7, 2015 |
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Abstract
Official abstract text for this publication.
The flowmeter comprises a flow sensor with a flow tube, two electrodes, and two field coils traversed by a first excitation current and a second excitation current, respectively, as well as control and evaluation electronics. The method serves to generate an error signal when the uniform turbulence in the liquid to be measured is disturbed. There are four quarter cycles. During each quarter cycle, a voltage is derived from the electrodes, and from these voltages, a first and a second voltage difference and a quotient using the first and the second voltage differences are formed. The latter is determined during calibration under uniformly turbulent flow conditions, and stored. In operation, values of the quotient are continuously formed and compared with the stored quotient; in case of deviations, an alarm is triggered and/or the volumetric flow rate signal represented by the first voltage difference is corrected.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of operating an electromagnetic flowmeter having a flow tube connected into a fluid-conveying line, said method comprising the steps of: causing the fluid to flow though the flow tube; causing a first excitation current of predeterminable strength, said first excitation current being generated by means of a measuring and control circuit of the electromagnetic flowmeter, to flow through a first field coil mounted on the flow tube for producing a fi…
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Classifications
- G01F15/86Primary
Physics · mapped topic
- G01F1/60Primary
Physics · mapped topic
- G01F15/022Primary
Physics · mapped topic
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Frequently asked questions
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- What does patent USRE45447E cover?
- The flowmeter comprises a flow sensor with a flow tube, two electrodes, and two field coils traversed by a first excitation current and a second excitation current, respectively, as well as control and evaluation electronics. The method serves to generate an error signal when the uniform turbulence in the liquid to be measured is disturbed. There are four quarter cycles. During each quarter cyc…
- Who is the assignee on this patent?
- Budmiger Thomas, Flowtec Ag
- What technology area does this patent fall under?
- Primary CPC classification G01F15/86. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Apr 07 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (E1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We do not list related publications for this record yet—either no in-corpus citations or no shared primary CPC matches in our current data slice.