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Non-Invasive pressure measurement in PVC tube

Metslaid, Richard LU (2018) In Master’s Theses in Mathematical Sciences FMA820 20171
Mathematics (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.
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author
Metslaid, Richard LU
supervisor
organization
course
FMA820 20171
year
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},
  keyword      = {pressure,sensor,non-invasive},
  language     = {eng},
  note         = {Student Paper},
  series       = {Master’s Theses in Mathematical Sciences},
  title        = {Non-Invasive pressure measurement in PVC tube},
  year         = {2018},
}