Pub Date : 2019-05-01DOI: 10.1109/I2MTC.2019.8827146
Duaa Alshadli, A. Chong
The Foot Posture Index (FPI) has in recent years become one of the most useful foot posture assessment tools due to its proven high reliability and validity. The main advantage of the FPI over other foot posture assessment techniques is the ability to provide a multi-segment analysis of the foot from six different foot components. The FPI is yet to be assessed for reliability against dynamic foot mobility and posture measures based on the dorsum of the foot as a point of reference. Therefore, this study utilized a developed dynamic 3D measurement system to determine the relationship between the FPI scores with the dynamic Foot Mobility Magnitude (FMM) measures. From the study, it was found that there was no significant correlation between the FPI scores of foot posture and the dynamic behavior of the foot, indicating that the only way to assess foot mobility is through dynamic image-based measurements.
{"title":"Correlating foot posture with foot mobility using a high-accuracy foot measurement system","authors":"Duaa Alshadli, A. Chong","doi":"10.1109/I2MTC.2019.8827146","DOIUrl":"https://doi.org/10.1109/I2MTC.2019.8827146","url":null,"abstract":"The Foot Posture Index (FPI) has in recent years become one of the most useful foot posture assessment tools due to its proven high reliability and validity. The main advantage of the FPI over other foot posture assessment techniques is the ability to provide a multi-segment analysis of the foot from six different foot components. The FPI is yet to be assessed for reliability against dynamic foot mobility and posture measures based on the dorsum of the foot as a point of reference. Therefore, this study utilized a developed dynamic 3D measurement system to determine the relationship between the FPI scores with the dynamic Foot Mobility Magnitude (FMM) measures. From the study, it was found that there was no significant correlation between the FPI scores of foot posture and the dynamic behavior of the foot, indicating that the only way to assess foot mobility is through dynamic image-based measurements.","PeriodicalId":132588,"journal":{"name":"2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122347653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-05-01DOI: 10.1109/I2MTC.2019.8826974
Lide Fang, Song Wang, C. Xie, Zihui Wei, Xiaoting Li
We use a new type of internal and external tube differential pressure flowmeter to study the gas-liquid two-phase flow measurement characteristics of the vertical riser. Firstly, according to the continuous equation and the Bernoulli equation, the two-phase flow formula is derived, and then the correction coefficient is introduced. Under the condition of the known inlet parameters, the differential pressure signal and the liquid Froude number, the gas Froude number, and the Luo are analyzed. The relationship between the horse parameter and the correction coefficient is obtained, and the fitting relationship of each parameter is obtained. Then, by analyzing the pressure loss ratio and the variation law of the Lomman parameters, the mathematical model of pressure loss ratio, liquid Froude number and Loma parameters is established, and then the phase hold ratio is obtained. The method of calculating the Froude number of the liquid phase by differential pressure is used as the basis to calculate the two-parameter measurement of phase fraction and flow rate, which provides a new method for the separation measurement of gas-liquid two-phase flow.
{"title":"Flow and phase volume fraction measurement of bubble flow","authors":"Lide Fang, Song Wang, C. Xie, Zihui Wei, Xiaoting Li","doi":"10.1109/I2MTC.2019.8826974","DOIUrl":"https://doi.org/10.1109/I2MTC.2019.8826974","url":null,"abstract":"We use a new type of internal and external tube differential pressure flowmeter to study the gas-liquid two-phase flow measurement characteristics of the vertical riser. Firstly, according to the continuous equation and the Bernoulli equation, the two-phase flow formula is derived, and then the correction coefficient is introduced. Under the condition of the known inlet parameters, the differential pressure signal and the liquid Froude number, the gas Froude number, and the Luo are analyzed. The relationship between the horse parameter and the correction coefficient is obtained, and the fitting relationship of each parameter is obtained. Then, by analyzing the pressure loss ratio and the variation law of the Lomman parameters, the mathematical model of pressure loss ratio, liquid Froude number and Loma parameters is established, and then the phase hold ratio is obtained. The method of calculating the Froude number of the liquid phase by differential pressure is used as the basis to calculate the two-parameter measurement of phase fraction and flow rate, which provides a new method for the separation measurement of gas-liquid two-phase flow.","PeriodicalId":132588,"journal":{"name":"2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122899609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-05-01DOI: 10.1109/I2MTC.2019.8827019
Michael Grubmüiller, M. Neumayer
High voltage differential probes are widely used for measurements in power electronics. For accurate measurements in power electronics, the use of probes with flat passband frequency response is indispensable. In this article we present a measurement method to evaluate the passband frequency response of a probe up to 10 MHz. We introduce an oscilloscope based setup, including a calibration procedure with a reference attenuator. Amplitude and phase estimation of the oscilloscope data is done with enhanced versions of the IEEE 1057 and 1251 sine-wave fit algorithms. The feasibility of the presented method is verified by a detailed uncertainty evaluation for the complex valued passband frequency response. The uncertainty assessment is done with two different methods, provided by the Guide to the Expression of Uncertainty in Measurement (GUM) and the associated Supplement 2.
{"title":"Passband frequency response measurement of a high voltage differential probe up to 10 MHz","authors":"Michael Grubmüiller, M. Neumayer","doi":"10.1109/I2MTC.2019.8827019","DOIUrl":"https://doi.org/10.1109/I2MTC.2019.8827019","url":null,"abstract":"High voltage differential probes are widely used for measurements in power electronics. For accurate measurements in power electronics, the use of probes with flat passband frequency response is indispensable. In this article we present a measurement method to evaluate the passband frequency response of a probe up to 10 MHz. We introduce an oscilloscope based setup, including a calibration procedure with a reference attenuator. Amplitude and phase estimation of the oscilloscope data is done with enhanced versions of the IEEE 1057 and 1251 sine-wave fit algorithms. The feasibility of the presented method is verified by a detailed uncertainty evaluation for the complex valued passband frequency response. The uncertainty assessment is done with two different methods, provided by the Guide to the Expression of Uncertainty in Measurement (GUM) and the associated Supplement 2.","PeriodicalId":132588,"journal":{"name":"2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)","volume":"71 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114129611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
There are inconsistent, uncertain and incomplete characteristics in Electrical impedance tomography (EIT) due to two natural problems of ill-posedness and ‘soft field’ effect. The traditional EIT inverse problem solving algorithms are based on deterministic objective functions and constraints which cannot efficiently represent the natural characteristics in the EIT process. Consequently, the EIT images have low spatial resolution. Inversely, the fuzzy set theory has been validated to represent imprecise data. To represent the natural characteristics in the EIT process, an asymmetric fuzzy linear programming (AFLP) model is applied to find the optimal solution for EIT imaging process. Moreover, the parameters in AFLP are alternatively optimized. Experimental results show that AFLP has better imaging effect and higher robustness than the traditional algorithms. Compared with the existing symmetrical fuzzy linear programming (SFLP) algorithm, AFLP algorithm has high resolution for both discrete and continuous objects. These results show that AFLP algorithm provides an effective solution to enhance the EIT imaging resolution.
{"title":"Application of Asymmetric Fuzzy Linear Programming in EIT","authors":"Mingliang Ding, Shihong Yue, Jia Li, Yaru Wang, Xiaofeng Gao, Huaxiang Wang","doi":"10.1109/I2MTC.2019.8827143","DOIUrl":"https://doi.org/10.1109/I2MTC.2019.8827143","url":null,"abstract":"There are inconsistent, uncertain and incomplete characteristics in Electrical impedance tomography (EIT) due to two natural problems of ill-posedness and ‘soft field’ effect. The traditional EIT inverse problem solving algorithms are based on deterministic objective functions and constraints which cannot efficiently represent the natural characteristics in the EIT process. Consequently, the EIT images have low spatial resolution. Inversely, the fuzzy set theory has been validated to represent imprecise data. To represent the natural characteristics in the EIT process, an asymmetric fuzzy linear programming (AFLP) model is applied to find the optimal solution for EIT imaging process. Moreover, the parameters in AFLP are alternatively optimized. Experimental results show that AFLP has better imaging effect and higher robustness than the traditional algorithms. Compared with the existing symmetrical fuzzy linear programming (SFLP) algorithm, AFLP algorithm has high resolution for both discrete and continuous objects. These results show that AFLP algorithm provides an effective solution to enhance the EIT imaging resolution.","PeriodicalId":132588,"journal":{"name":"2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114575041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-05-01DOI: 10.1109/I2MTC.2019.8827157
Hong-hui Yang, Yan Chen, Guangming Qing, Hui Zhao
Flow measurement is a technology that has developed rapidly in the 20th century. Electromagnetic flowmeters are widely used in industrial fields such as water resources, food, and chemical industries. They are closely related to daily life and play an important role in industrial development, ecological environment protection, and energy conservation. An improved excitation structure is proposed in this paper based on Helmholtz coil, and its magnetic field distribution is simulated. Through the analysis of the simulation results, the minimum coil width for obtaining the ideal uniform magnetic field is determined. The proposed method can minimize the physical size of the flow sensor while ensuring the best measurement results.
{"title":"Excitation Structure Design and Magnetic Field Analysis of a New Electromagnetic Flowmeter Based on Magnetically Permeable Material","authors":"Hong-hui Yang, Yan Chen, Guangming Qing, Hui Zhao","doi":"10.1109/I2MTC.2019.8827157","DOIUrl":"https://doi.org/10.1109/I2MTC.2019.8827157","url":null,"abstract":"Flow measurement is a technology that has developed rapidly in the 20th century. Electromagnetic flowmeters are widely used in industrial fields such as water resources, food, and chemical industries. They are closely related to daily life and play an important role in industrial development, ecological environment protection, and energy conservation. An improved excitation structure is proposed in this paper based on Helmholtz coil, and its magnetic field distribution is simulated. Through the analysis of the simulation results, the minimum coil width for obtaining the ideal uniform magnetic field is determined. The proposed method can minimize the physical size of the flow sensor while ensuring the best measurement results.","PeriodicalId":132588,"journal":{"name":"2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122025701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-05-01DOI: 10.1109/I2MTC.2019.8827161
Xiang Wei, Bing Li, Xiao Yan, Lei Chen, W. Su, Meiting Xin, Zhongyu Shang
This paper proposes a calibration approach of linear scanning sensor (LSS) for the three-dimensional measurement of turbine blade surface. The linear scanning method is an effective method of complex surface measurement. It is characterized by non-contact, large measuring range and high measuring efficiency. But in practice, the measurement accuracy is usually limited by the installation pose. To improve the measurement accuracy, a practical calibration strategy is presented. The experiment was carried out using a standard cylinder to calibrate the LSS. By introducing the calibration method, the experimental data were improved in simulation. Finally, in the application of an aero-engine blade measurement, the calibration method was used to calculate the pose error of the LSS. By comparing the measurement result with a CMM of a blade, the measurement accuracy is significantly improving.
{"title":"Calibration of Sensor Pose Error in Aero-Engine Blade Measurement","authors":"Xiang Wei, Bing Li, Xiao Yan, Lei Chen, W. Su, Meiting Xin, Zhongyu Shang","doi":"10.1109/I2MTC.2019.8827161","DOIUrl":"https://doi.org/10.1109/I2MTC.2019.8827161","url":null,"abstract":"This paper proposes a calibration approach of linear scanning sensor (LSS) for the three-dimensional measurement of turbine blade surface. The linear scanning method is an effective method of complex surface measurement. It is characterized by non-contact, large measuring range and high measuring efficiency. But in practice, the measurement accuracy is usually limited by the installation pose. To improve the measurement accuracy, a practical calibration strategy is presented. The experiment was carried out using a standard cylinder to calibrate the LSS. By introducing the calibration method, the experimental data were improved in simulation. Finally, in the application of an aero-engine blade measurement, the calibration method was used to calculate the pose error of the LSS. By comparing the measurement result with a CMM of a blade, the measurement accuracy is significantly improving.","PeriodicalId":132588,"journal":{"name":"2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128793336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-05-01DOI: 10.1109/I2MTC.2019.8826823
M. Dvorsky, John R. Gallion, M. Ghasr, R. Zoughi
The utilization of orthogonal binary phase shift keying (BPSK) modulation in a microwave synthetic aperture radar (SAR) imaging system is a novel technique that reduces the complexity of system hardware and expedites the measurement process for large imaging arrays. BPSK techniques are commonly used in ranging and communications, where transmitting multiple signals without interference is important. This methodology can also be applied to multistatic SAR imaging, allowing an imaging array to simultaneously gather data from all transmit/receive pairs. These measurements can then be processed with a robust SAR imaging algorithm, resulting in real-time generation of 3D images for a variety of applications including those involving nondestructive testing (NDT). Current array-based imaging techniques utilize switch-based or frequency offset designs. These designs suffer from increased hardware complexity, and in the case of switch-based systems, longer measurement times. Utilizing orthogonal coding techniques allows an array to transmit and receive from many elements simultaneously, which reduces measurement time and simplifies system hardware, since the codes are generated and processed in software. This paper discusses the theory behind the proposed imaging technique and shows a proof of concept system that was used to create microwave SAR images of targets.
{"title":"Multistatic Microwave Synthetic Aperture Radar (SAR) Imaging Using Orthogonal Binary Coding","authors":"M. Dvorsky, John R. Gallion, M. Ghasr, R. Zoughi","doi":"10.1109/I2MTC.2019.8826823","DOIUrl":"https://doi.org/10.1109/I2MTC.2019.8826823","url":null,"abstract":"The utilization of orthogonal binary phase shift keying (BPSK) modulation in a microwave synthetic aperture radar (SAR) imaging system is a novel technique that reduces the complexity of system hardware and expedites the measurement process for large imaging arrays. BPSK techniques are commonly used in ranging and communications, where transmitting multiple signals without interference is important. This methodology can also be applied to multistatic SAR imaging, allowing an imaging array to simultaneously gather data from all transmit/receive pairs. These measurements can then be processed with a robust SAR imaging algorithm, resulting in real-time generation of 3D images for a variety of applications including those involving nondestructive testing (NDT). Current array-based imaging techniques utilize switch-based or frequency offset designs. These designs suffer from increased hardware complexity, and in the case of switch-based systems, longer measurement times. Utilizing orthogonal coding techniques allows an array to transmit and receive from many elements simultaneously, which reduces measurement time and simplifies system hardware, since the codes are generated and processed in software. This paper discusses the theory behind the proposed imaging technique and shows a proof of concept system that was used to create microwave SAR images of targets.","PeriodicalId":132588,"journal":{"name":"2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130665592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-05-01DOI: 10.1109/I2MTC.2019.8827114
Guanyu Piao, Jingbo Guo, Tiehua Hu, Y. Deng
High-speed inspection of defects on thick-wall steel pipes is important to pipeline inline inspection (ILI) in the oil and gas industry. Traditional inspection methods are limited by the main challenges of inspection principle, sensor design and instrument implementation, resulting in these methods hardly applicable to practical high-speed pipeline ILI. This paper proposes a novel high-speed inspection method fusing pulsed eddy current (PEC) and magnetic flux leakage (MFL) to detect sub-surface defects. When the ferromagnetic steel pipes are magnetized by an applied strong DC magnetic field to saturation status, the existence of sub-surface defects will cause leaked magnetic fields and non-uniform permeability distributions, which can be measured by Hall effect sensors and PEC coil sensors, respectively. A fusion inspection probe containing four-channel Hall effect sensors and two-channel PEC coil sensors is designed and developed here for measuring three-axis MFL signals and 2-D PEC signals simultaneously. A novel high-speed pipeline inspection gauge (PIG) with a sensor array containing 45 fusion inspection probes is developed for field testing to validate the proposed method that achieved superior detection capability in high inspection speed.
{"title":"High-Speed Inspection Method Fusing Pulsed Eddy Current and Magnetic Flux Leakage","authors":"Guanyu Piao, Jingbo Guo, Tiehua Hu, Y. Deng","doi":"10.1109/I2MTC.2019.8827114","DOIUrl":"https://doi.org/10.1109/I2MTC.2019.8827114","url":null,"abstract":"High-speed inspection of defects on thick-wall steel pipes is important to pipeline inline inspection (ILI) in the oil and gas industry. Traditional inspection methods are limited by the main challenges of inspection principle, sensor design and instrument implementation, resulting in these methods hardly applicable to practical high-speed pipeline ILI. This paper proposes a novel high-speed inspection method fusing pulsed eddy current (PEC) and magnetic flux leakage (MFL) to detect sub-surface defects. When the ferromagnetic steel pipes are magnetized by an applied strong DC magnetic field to saturation status, the existence of sub-surface defects will cause leaked magnetic fields and non-uniform permeability distributions, which can be measured by Hall effect sensors and PEC coil sensors, respectively. A fusion inspection probe containing four-channel Hall effect sensors and two-channel PEC coil sensors is designed and developed here for measuring three-axis MFL signals and 2-D PEC signals simultaneously. A novel high-speed pipeline inspection gauge (PIG) with a sensor array containing 45 fusion inspection probes is developed for field testing to validate the proposed method that achieved superior detection capability in high inspection speed.","PeriodicalId":132588,"journal":{"name":"2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)","volume":"10 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120912612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-05-01DOI: 10.1109/I2MTC.2019.8827056
S. H. Stavland, C. Sætre, B. T. Hjertaker, S. Tjugum, A. Hallanger, R. Maad
Gamma-densitometry is a widely used non-intrusive measurement technique to measure the local gas fraction of gas-liquid two-phase pipe flow. The ability to accurately predict the gas fraction of gas-liquid pipe flow is of great importance in many process industries, e.g. in the oil and gas industry. The objective of this work has been to study different gamma-ray beam trajectories for single and dual beam gamma-densitometers in order to determine the optimal source-detector layout of a dual beam densitometer for vertical gas-liquid pipe flow. The work is based on experiments using a high-speed gamma-ray tomograph (GRT) designed and prototyped at Department of Physics and Technology, University of Bergen. The GRT, which was originally developed for imaging of multiphase hydrocarbon flow, is based on 85 independent gamma-ray beams. Each beam represent an individual single beam densitometer measurement. Combined, the 85 beams accurately measures the density or cross sectional fractions of two-phase flow. The experimental work was conducted using the multiphase flow facility at Christian Michelsen Research, Norway. The results of the experiments show which beam trajectories gives the best accuracy for single and dual beam gamma-densitometer measurement.
{"title":"Gas Fraction Measurements using Single and Dual Beam Gamma-Densitometry for Two Phase Gas-Liquid Pipe Flow","authors":"S. H. Stavland, C. Sætre, B. T. Hjertaker, S. Tjugum, A. Hallanger, R. Maad","doi":"10.1109/I2MTC.2019.8827056","DOIUrl":"https://doi.org/10.1109/I2MTC.2019.8827056","url":null,"abstract":"Gamma-densitometry is a widely used non-intrusive measurement technique to measure the local gas fraction of gas-liquid two-phase pipe flow. The ability to accurately predict the gas fraction of gas-liquid pipe flow is of great importance in many process industries, e.g. in the oil and gas industry. The objective of this work has been to study different gamma-ray beam trajectories for single and dual beam gamma-densitometers in order to determine the optimal source-detector layout of a dual beam densitometer for vertical gas-liquid pipe flow. The work is based on experiments using a high-speed gamma-ray tomograph (GRT) designed and prototyped at Department of Physics and Technology, University of Bergen. The GRT, which was originally developed for imaging of multiphase hydrocarbon flow, is based on 85 independent gamma-ray beams. Each beam represent an individual single beam densitometer measurement. Combined, the 85 beams accurately measures the density or cross sectional fractions of two-phase flow. The experimental work was conducted using the multiphase flow facility at Christian Michelsen Research, Norway. The results of the experiments show which beam trajectories gives the best accuracy for single and dual beam gamma-densitometer measurement.","PeriodicalId":132588,"journal":{"name":"2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125685907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-05-01DOI: 10.1109/I2MTC.2019.8826841
H. Kirkham, D. White
The measurement of partial discharges in solid insulation is predictive of the long-term performance of the insulation. That makes the measurement very important in high-voltage technology. The topic has been of interest for a long time, and has been extensively studied around the world. And yet sometimes there are discussions—arguments, even—over the meaning of the results, and whether a model based on void capacitance or dipole moments is appropriate. The reason that differences of opinion can still exist in this field is grounded in the nature of the measurement itself. This paper reviews the origins of the measurement and explores its nature. The paper shows that further discussion over meaning is unwarranted because no model is appropriate. The measurement is an operationalist one.
{"title":"The Nature of the Measurement of Partial Discharge","authors":"H. Kirkham, D. White","doi":"10.1109/I2MTC.2019.8826841","DOIUrl":"https://doi.org/10.1109/I2MTC.2019.8826841","url":null,"abstract":"The measurement of partial discharges in solid insulation is predictive of the long-term performance of the insulation. That makes the measurement very important in high-voltage technology. The topic has been of interest for a long time, and has been extensively studied around the world. And yet sometimes there are discussions—arguments, even—over the meaning of the results, and whether a model based on void capacitance or dipole moments is appropriate. The reason that differences of opinion can still exist in this field is grounded in the nature of the measurement itself. This paper reviews the origins of the measurement and explores its nature. The paper shows that further discussion over meaning is unwarranted because no model is appropriate. The measurement is an operationalist one.","PeriodicalId":132588,"journal":{"name":"2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130111185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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