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Non-invasive pressure measurement: -

Translated title

Non-invasiv trykmåling: -

Author

Term

7. term

Publication year

2016

Submitted on

Pages

39

Abstract

Dette projekt undersøger, om det er muligt at måle det indvendige tryk i et rør udefra ved hjælp af en tøjningsmåler (strain gauge). Baggrunden er, at ekstra flangeforbindelser ofte monteres for at installere trykmåleinstrumenter i procesanlæg, men hver flange er en potentiel lækagekilde og dermed et sikkerheds- og omkostningsproblem. Undersøgelsen tester, om det indvendige tryk får røret til at udvide sig så meget, at der opstår en målbar tøjning på ydersiden. En tøjningsmåler er en lille sensor, der registrerer meget små deformationer i materialet. Derudover kortlægges kravene til instrumentering og installation for at kunne kommercialisere løsningen, med fokus på sensorplacering, montage og forholdet til elsystemer. Endelig er der udviklet en simpel regulator i MATLAB og Simulink, som kompenserer for temperaturændringer og gør det muligt at justere for materialetyper og godstykkelser i henhold til NORSOK-rørstandarder. Materialedatabasen kan udvides, så styringen kan anvendes bredere på forskellige rørspecifikationer og materialer.

This project examines whether internal pipe pressure can be measured from the outside using a strain gauge. The motivation is that extra flanged joints are often installed to mount pressure instruments in process plants, but each flange is a potential leak point and therefore a safety and cost concern. The study tests whether internal pressure causes enough expansion to produce a measurable strain at the pipe surface. A strain gauge is a small sensor that detects very small deformations in the material. The work also identifies the instrumentation and installation requirements for a commercial solution, focusing on sensor location, mounting, and integration with electrical systems. Finally, a simple controller was built in MATLAB and Simulink to compensate for temperature changes and to adjust for pipe material and wall thickness in line with NORSOK piping specifications. The materials database can be expanded so the controller can be applied more widely across different piping specifications and materials.

[This abstract was generated with the help of AI]