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Reference setup for characterization and calibration of low-range differential pressure sensors
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
2015 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

In this thesis, a reference setup for the characterization and calibration of low range differential pressure sensors is presented. The setup utilizes the principle of ideal gas law and actuates on the volume for accurate reference pressure inputs for the calibration process. The error sources for the proposed setup are analysed and an error propagation modelis presented. The range of the setup is ±320 Pa, with the resolution of 0.001% of full scale. The verified sensitivity of the setup is 0.032 Pa. A complete characterization of a high performance differential pressure transducer is conducted as a test case study for the performance analysis of the proposed setup. During these experiments the sensitivity of the calibration setup to the thermal gradient is observed. To this end, the effects of thermal gradient on the transient response of the setup are also studied, utilizing a comparative experimental study. From the presented experimental study it is concluded that the thermal gradient can cause the system to remain in transient state for at least 96 hours. To reduce this effect, a mechanical design optimization is proposed and a finite element model is presented to be studied in comparison to its preceding design for its thermal performance. From the results it is concluded that the optimized design can reduce the transient time of the measurement system due to thermal gradient, by 11 times. Future work is also proposed to further investigate the optimized model for implementation purposes.

Place, publisher, year, edition, pages
Sundsvall: Mittuniversitetet , 2015. , 67 p.
Series
Mid Sweden University licentiate thesis, ISSN 1652-8948 ; 115
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-26528Local ID: STCISBN: 978-91-88025-09-8 (print)OAI: oai:DiVA.org:miun-26528DiVA: diva2:882986
Presentation
2015-10-08, O102, 13:15 (English)
Supervisors
Available from: 2015-12-16 Created: 2015-12-16 Last updated: 2017-03-02Bibliographically approved
List of papers
1. High performance reference setup for characterization and calibration of low-range differential pressure sensors
Open this publication in new window or tab >>High performance reference setup for characterization and calibration of low-range differential pressure sensors
2015 (English)In: IEEE Transactions on Instrumentation and Measurement, ISSN 0018-9456, E-ISSN 1557-9662, Vol. 64, no 1, 154-162 p.Article in journal (Refereed) Published
Abstract [en]

The calibration of sensors is one of the most frequently carried out maintenance operations on sensor networks. This paper presents the design of a reference instrument for the static calibration of low-range (up to ±320 Pa) differential pressure sensors. A method is proposed for the calibration setup and the design issues are discussed in addition to a complete error analysis. An experimental setup is also proposed. From the conducted experiments, it is verified that the sensitivity of the reference setup is at least 0.032 Pa with the achievable resolution of 0.001% of full scale. This paper also presents an embedded electronics design for both the calibration and the characterization profile handling. A full performance characterization of a sample differential pressure sensor is also presented in terms of sensitivity, linearity, hysteresis, and temperature dependency. A comprehensive discussion involving the design parameters analysis and the worst case performance is also included. In conclusion, it is summarized that the proposed design out performs the conventional reference instruments, so that it can be used for the calibration and characterization of a wide variety of low-range differential pressure sensors.

Keyword
Actuators, calibration, electronics, mechanical factors, pressure measurement
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-24076 (URN)10.1109/TIM.2014.2329739 (DOI)000346085800015 ()2-s2.0-84918505789 (Scopus ID)STC (Local ID)STC (Archive number)STC (OAI)
Note

CODEN: IEIMA

Available from: 2015-01-07 Created: 2015-01-07 Last updated: 2016-12-21Bibliographically approved
2. The effects of temperature gradient on transient behavior of low-range differential air pressure calibration setup
Open this publication in new window or tab >>The effects of temperature gradient on transient behavior of low-range differential air pressure calibration setup
2015 (English)In: Proceedings of the IEEE International Conference on Industrial Technology, 2015, no June, 1488-1494 p.Conference paper, (Refereed)
Abstract [en]

Low range differential air pressure sensors are used widely in various applications. In this paper the effects of temperature change on transient behavior of the calibration setup for differential air pressure sensors, due to temperature gradient are analyzed. A high performance reference setup utilizing ideal gas law, for differential air pressure sensors, is selected for experimental analysis. The range of the setup is ±320 Pa with the achievable resolution down to 0.001% of the full scale. Due to the nature of ideal gas law, the experimental setup should also exhibit a high sensitivity to the temperature gradient on mechanical structure. In order to characterize the effects of this temperature gradient on the transient state of the setup, a two stage comparative experimental study is proposed. In stage one a thermal buffer is introduced surrounding the mechanical structure of the setup and the experiments are conducted by changing the temperature to the system. In stage two the temperature is changed in the same manner, but the experiments are conducted with the original experimental setup. From the results obtained by the experiments using the thermal buffer, it is observed that the temperature change of 5°C, can cause the system to stay in transient state for up to 32 hours with an error of up to 10% of full scale. Whereas, the results from the original calibration setup show that the system stays in transient state for more than 96 hours with a monotonic drift. From the comparative analysis of the experimental results we conclude that the high sensitivity calibration setup for differential air pressure sensors also have a high sensitivity to the temperature gradient. Although the thermal buffer can minimize the effects of the temperature gradient on the transient behavior of the calibration setup, the modification to the existing mechanical design is considered as more practical. Future work is proposed in order to study the thermal gradient on the mechanical structure and design a setup that is less vulnerable to it. © 2015 IEEE.

Keyword
Actuators, Calibration, Electronics, Mechanical factors, Pressure measurement, Temperature measurement
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-25807 (URN)10.1109/ICIT.2015.7125307 (DOI)000377572201070 ()2-s2.0-84937716722 (Scopus ID)STC (Local ID)STC (Archive number)STC (OAI)
Conference
2015 IEEE International Conference on Industrial Technology, ICIT 2015; Seville; Spain; 17 March 2015 through 19 March 2015
Note

Export Date: 28 August 2015

Available from: 2015-09-10 Created: 2015-08-28 Last updated: 2016-12-23Bibliographically approved
3. Design optimization of differential air pressure sensor calibration setup for sensitivity minimization to thermal gradient
Open this publication in new window or tab >>Design optimization of differential air pressure sensor calibration setup for sensitivity minimization to thermal gradient
2016 (English)In: 2015 IEEE 12th International Conference on Electronic Measurement and Instruments, ICEMI 2015, IEEE conference proceedings, 2016, 7494452Conference paper, (Refereed)
Abstract [en]

This paper focuses on the thermal stability of a high performance, low-range calibration setup for differential airpressure sensors. The setup is a dual parallel chamber design with the full range of ±320 Pa, which can be translated to a temperature mismatch of only about 0.93oC between the chambers. Due to the limitations of existing temperature measurement technology, we propose a finite element model(FEM) analysis to study the effect of thermal gradient on the calibration setup. The model setup includes the dual parallel chamber design inside a conventional climate chamber. From the conducted analysis we observe that, due to the non-ideal heat distribution inside the climate chamber, the calibration setup can experience an error of more than 20 % of full range.To minimize this error, we propose an optimized dual cascaded chamber calibration setup design and verify its thermal performance under the same environmental setup. The results show that the proposed design reduces the error, due to thermal gradient, down to 1.8 % of full range. In conclusion it is also discussed that the proposed design reduces error sources related to its mechanical complexity. Future work is proposed on the design and implementation of the optimized design.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2016
Keyword
Actuators, Calibration, Electronics, Mechanical factors, Temperature measurement
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-26532 (URN)10.1109/ICEMI.2015.7494452 (DOI)2-s2.0-84978234737 (Scopus ID)STC (Local ID)978-1-4799-7071-1 (ISBN)STC (Archive number)STC (OAI)
Conference
2th IEEE International Conference on Electronic Measurement and Instruments, ICEMI 2015; Qingdao; China; 16 July 2015 through 18 July 2015; Category numberCFPI533C-PRT; Code 122296
Available from: 2015-12-16 Created: 2015-12-16 Last updated: 2016-12-23Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
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