Non-Invasive pressure measurement in PVC tube
(2018) In Master’s Theses in Mathematical Sciences FMA820 20171Mathematics (Faculty of Engineering)
- Abstract
- In peritoneal dialysis it is important to make sure the pressure doesn't exceed certain limits. It is desirable to do the measuring without inserting anything inside of the tubing containing the dialysate. This project uses a load cell pressed against the outside of the PVC tubing to estimate the pressure inside. The interval tested is approximately atmospheric pressure +- 220 mBar. The temperature is constant room temperature (approximately 20 C). The best estimate of the pressure uses a neural network to process the data and results in a mean absolute error of 7.31 mBar. The max error is 126 mBar. The target accuracy was approximately 20 mBar and approximately 88.6 % of the errors are below or equal to 20 mBar. Unfortunately the errors... (More)
- In peritoneal dialysis it is important to make sure the pressure doesn't exceed certain limits. It is desirable to do the measuring without inserting anything inside of the tubing containing the dialysate. This project uses a load cell pressed against the outside of the PVC tubing to estimate the pressure inside. The interval tested is approximately atmospheric pressure +- 220 mBar. The temperature is constant room temperature (approximately 20 C). The best estimate of the pressure uses a neural network to process the data and results in a mean absolute error of 7.31 mBar. The max error is 126 mBar. The target accuracy was approximately 20 mBar and approximately 88.6 % of the errors are below or equal to 20 mBar. Unfortunately the errors are highly autocorrelated so there is a possibility of something missing from the model. (Less)
- Popular Abstract (Swedish)
- Tryckmätningar underlättas ifall sensorn som används har kontakt med mediet, eller om där är ett membran mellan. Detta projekt har undersökt ifall man kan komma runt det och använda en kraftsensor på utsidan av en PVC-slang för att uppskatta trycket inuti.
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/8935895
- author
- Metslaid, Richard LU
- supervisor
- organization
- course
- FMA820 20171
- year
- 2018
- type
- H2 - Master's Degree (Two Years)
- subject
- keywords
- pressure, sensor, non-invasive
- publication/series
- Master’s Theses in Mathematical Sciences
- report number
- LUTFMA-3338-2018
- ISSN
- 1404-6342
- other publication id
- 2018:E3
- language
- English
- id
- 8935895
- date added to LUP
- 2018-03-16 16:48:49
- date last changed
- 2018-03-16 16:48:49
@misc{8935895, abstract = {{In peritoneal dialysis it is important to make sure the pressure doesn't exceed certain limits. It is desirable to do the measuring without inserting anything inside of the tubing containing the dialysate. This project uses a load cell pressed against the outside of the PVC tubing to estimate the pressure inside. The interval tested is approximately atmospheric pressure +- 220 mBar. The temperature is constant room temperature (approximately 20 C). The best estimate of the pressure uses a neural network to process the data and results in a mean absolute error of 7.31 mBar. The max error is 126 mBar. The target accuracy was approximately 20 mBar and approximately 88.6 % of the errors are below or equal to 20 mBar. Unfortunately the errors are highly autocorrelated so there is a possibility of something missing from the model.}}, author = {{Metslaid, Richard}}, issn = {{1404-6342}}, language = {{eng}}, note = {{Student Paper}}, series = {{Master’s Theses in Mathematical Sciences}}, title = {{Non-Invasive pressure measurement in PVC tube}}, year = {{2018}}, }