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Fluid composition monitor using electrode pair
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.ORCID iD: 0000-0002-4133-3317
(English)Patent (Other (popular science, discussion, etc.))
Abstract [en]

The measurement body comprises two concentric metal tubes, one inner and one outer (3), sepd. by a distance component of electrically insulating material. The two tubes are connected by leads to a vector impedance meter for measuring phase angle. The body is fitted in a section of a tube in which the fluid to be monitored is transported, or, alternatively, inside a tube or tank in which the fluid is stored. The fluid fills the space inside the inner tube and that between it and the outer tube. The ends of the inner tube may be blocked so that only the space between the two tubes is filled with fluid. Thus, a capacitor is formed by the measurement body, and the two tubes constitute its electrodes. When monitoring the compsn. of a fluid, a known high frequency alternating voltage is fed over the two electrodes, and the phase angle between the voltage and the resultant current is measured, it being preferable for the frequency of the voltage or current ot be in the interval of 250 kHz.

National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-36866Local ID: 724a6b40-d873-11db-a1bf-000ea68e967bOAI: oai:DiVA.org:ltu-36866DiVA: diva2:1010313
Patent
SE SE8700710, SE458068 (B)
Note

Upprättat; 1988; 20060926 (ysko)

Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-09-25Bibliographically approved

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Delsing, Jerker
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