Pub Date : 2014-10-02DOI: 10.1109/CPEM.2014.6898409
D. Newell, J. Liard, L. Chao, A. Cao, F. Seifert, D. Haddad, J. Pratt, S. Schlamminger
A new watt balance is being constructed at National Institute of Standards and Technology (NIST) in preparation for the redefinition of the International System of Units and the realization of mass through an exact value of the Planck constant. We describe the procedures used and give results for the measurements of the local acceleration of gravity in the new watt balance facility.
{"title":"The measurement of the local acceleration of gravity for the NIST-4 watt balance","authors":"D. Newell, J. Liard, L. Chao, A. Cao, F. Seifert, D. Haddad, J. Pratt, S. Schlamminger","doi":"10.1109/CPEM.2014.6898409","DOIUrl":"https://doi.org/10.1109/CPEM.2014.6898409","url":null,"abstract":"A new watt balance is being constructed at National Institute of Standards and Technology (NIST) in preparation for the redefinition of the International System of Units and the realization of mass through an exact value of the Planck constant. We describe the procedures used and give results for the measurements of the local acceleration of gravity in the new watt balance facility.","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122910444","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 : 2014-10-02DOI: 10.1109/CPEM.2014.6898527
Luiz Vicente Gomes Tarelho, Guilherme de Andrade Garcia, A. C. Baratto, Rodolfo Saboia Lima de Souza, J. de Martin, Stella Torres Muller, Daniel Varela Magalhaes, A. Bebeachibuli, V. Bagnato, G. Rovera
This paper describes the progress on commissioning a thermal Cesium beam frequency standard developed at IFSC-USP and transferred to the Brazilian NMI in order to be continuously operated as a primary frequency standard. The system is composed of a short Ramsey cavity for electromagnetic excitation and an optical pumping for atom detection and energy-state selection. The uncertainty budget for the measurement technique is under verification to acquire the same performance achieved earlier during the scientific development of the standard. Some aspects of the standard implantation are discussed here according to the technical and metrological requirements for the system.
{"title":"Joint effort to commissioning a thermal cesium beam with optical pumping as primary frequency standard to Brazilian NMI","authors":"Luiz Vicente Gomes Tarelho, Guilherme de Andrade Garcia, A. C. Baratto, Rodolfo Saboia Lima de Souza, J. de Martin, Stella Torres Muller, Daniel Varela Magalhaes, A. Bebeachibuli, V. Bagnato, G. Rovera","doi":"10.1109/CPEM.2014.6898527","DOIUrl":"https://doi.org/10.1109/CPEM.2014.6898527","url":null,"abstract":"This paper describes the progress on commissioning a thermal Cesium beam frequency standard developed at IFSC-USP and transferred to the Brazilian NMI in order to be continuously operated as a primary frequency standard. The system is composed of a short Ramsey cavity for electromagnetic excitation and an optical pumping for atom detection and energy-state selection. The uncertainty budget for the measurement technique is under verification to acquire the same performance achieved earlier during the scientific development of the standard. Some aspects of the standard implantation are discussed here according to the technical and metrological requirements for the system.","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124570893","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 : 2014-10-02DOI: 10.1109/CPEM.2014.6898385
Ki‐Yong Oh, Jae-Kyung Lee, Joon-Young Park, Jun-Shin Lee, B. Epureanu
In order to monitor blade health and detect any damage efficiently, a new diagnosis method for wind turbine blades was proposed. In consideration of harsh environments of a wind turbine rotor, high-resolution real-time blade condition monitoring was realized with the use of optic sensors and a wireless network. A hybrid algorithm, which merges a statistical method with model information, was introduced to overcome the weakness of each method. In addition, alarm limits are determined through a machine learning algorithm to enhance its reliability. The proposed algorithm was embedded in the Blade Health Monitoring and Integrity Evaluation System and was verified at a 3MW wind turbine of the Yeongheung wind farm.
{"title":"Blade health monitoring and diagnosis method to enhance operational safety of wind turbine","authors":"Ki‐Yong Oh, Jae-Kyung Lee, Joon-Young Park, Jun-Shin Lee, B. Epureanu","doi":"10.1109/CPEM.2014.6898385","DOIUrl":"https://doi.org/10.1109/CPEM.2014.6898385","url":null,"abstract":"In order to monitor blade health and detect any damage efficiently, a new diagnosis method for wind turbine blades was proposed. In consideration of harsh environments of a wind turbine rotor, high-resolution real-time blade condition monitoring was realized with the use of optic sensors and a wireless network. A hybrid algorithm, which merges a statistical method with model information, was introduced to overcome the weakness of each method. In addition, alarm limits are determined through a machine learning algorithm to enhance its reliability. The proposed algorithm was embedded in the Blade Health Monitoring and Integrity Evaluation System and was verified at a 3MW wind turbine of the Yeongheung wind farm.","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"34 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116590293","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 : 2014-10-02DOI: 10.1109/CPEM.2014.6898430
G. Rietveld, Martin Fransen, N. Blanc, E. Houtzager, E. So
A reference system for on-site calibration and validation of revenue metering systems is realized. The system consists of a three-phase power meter and high-accuracy current and voltage transformers (CTs and VTs). Measurements can be made up to 150 kV (system voltage) and line currents up to 5000 A. The power meter, the CTs, and the VTs were all calibrated. Based on the excellent results of the calibration of these components it is possible to predict the full system performance with an uncertainty of less than 100 μW/VA. This estimation was verified with a full system validation, showing that the system is much more accurate than required and that detrimental effects to the accuracy are well understood.
{"title":"A reference system for on-site calibration of high-voltage revenue metering systems","authors":"G. Rietveld, Martin Fransen, N. Blanc, E. Houtzager, E. So","doi":"10.1109/CPEM.2014.6898430","DOIUrl":"https://doi.org/10.1109/CPEM.2014.6898430","url":null,"abstract":"A reference system for on-site calibration and validation of revenue metering systems is realized. The system consists of a three-phase power meter and high-accuracy current and voltage transformers (CTs and VTs). Measurements can be made up to 150 kV (system voltage) and line currents up to 5000 A. The power meter, the CTs, and the VTs were all calibrated. Based on the excellent results of the calibration of these components it is possible to predict the full system performance with an uncertainty of less than 100 μW/VA. This estimation was verified with a full system validation, showing that the system is much more accurate than required and that detrimental effects to the accuracy are well understood.","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114823569","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 : 2014-10-02DOI: 10.1109/CPEM.2014.6898348
C. Rothleitner, T. Niebauer, O. Francis
We report on a direct measurement of the relativistic Doppler shift with a Mach-Zehnder type interferometer, where the object mirror is subject to an accelerated motion. The measurement was realized with a commercial free-fall absolute gravimeter FG5X, which is usually used to measure the local acceleration due to gravity, g. The second order term of the Doppler shift has been measured with a relative uncertainty of 1.1 × 10-3.
{"title":"Precision measurement of the relativistic Doppler shift of an accelerated system","authors":"C. Rothleitner, T. Niebauer, O. Francis","doi":"10.1109/CPEM.2014.6898348","DOIUrl":"https://doi.org/10.1109/CPEM.2014.6898348","url":null,"abstract":"We report on a direct measurement of the relativistic Doppler shift with a Mach-Zehnder type interferometer, where the object mirror is subject to an accelerated motion. The measurement was realized with a commercial free-fall absolute gravimeter FG5X, which is usually used to measure the local acceleration due to gravity, g. The second order term of the Doppler shift has been measured with a relative uncertainty of 1.1 × 10-3.","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114726376","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 : 2014-10-02DOI: 10.1109/CPEM.2014.6898325
Y. Sánchez, C. Rosi, E. Paez, M. Azpúrua
This paper presents an alternative application of the Feature Selective Validation (FSV) for comparing metrological data such as those coming from calibration certificates, standard references and historical records of intermediate verifications. Through the examples developed in this work, it is shown how the FSV method can be used to study the drift of the characteristic response of a measuring device, transducer or accessory, allowing identifying when the deviations observed are unacceptable requiring performing adjustments within the measurement chain. This approach can also be used to measure the improvement on a calibration method or of an specific condition of it.
{"title":"Feature Selective Validation applied to the comparison of calibration data","authors":"Y. Sánchez, C. Rosi, E. Paez, M. Azpúrua","doi":"10.1109/CPEM.2014.6898325","DOIUrl":"https://doi.org/10.1109/CPEM.2014.6898325","url":null,"abstract":"This paper presents an alternative application of the Feature Selective Validation (FSV) for comparing metrological data such as those coming from calibration certificates, standard references and historical records of intermediate verifications. Through the examples developed in this work, it is shown how the FSV method can be used to study the drift of the characteristic response of a measuring device, transducer or accessory, allowing identifying when the deviations observed are unacceptable requiring performing adjustments within the measurement chain. This approach can also be used to measure the improvement on a calibration method or of an specific condition of it.","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"181 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123427567","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 : 2014-10-02DOI: 10.1109/CPEM.2014.6898420
Feipeng Lin, Huanghui Zhang, H. Shao, B. Liang
This paper proposes a DC high-voltage resistive divider circuit model, analyzes the reason that leakage current arises when applying high voltage, develops the measurement device for measuring leakage current of a divider, and puts forward a method of evaluating the divider voltage variation by measuring leakage current. The measurement uncertainty is better than 4 × 10-6.
{"title":"Research on voltage variation of DC high-voltage resistive divider by Measuring Leakage Current","authors":"Feipeng Lin, Huanghui Zhang, H. Shao, B. Liang","doi":"10.1109/CPEM.2014.6898420","DOIUrl":"https://doi.org/10.1109/CPEM.2014.6898420","url":null,"abstract":"This paper proposes a DC high-voltage resistive divider circuit model, analyzes the reason that leakage current arises when applying high voltage, develops the measurement device for measuring leakage current of a divider, and puts forward a method of evaluating the divider voltage variation by measuring leakage current. The measurement uncertainty is better than 4 × 10-6.","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123570204","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 : 2014-10-02DOI: 10.1109/CPEM.2014.6898522
M. Ishii, Jeong Hwan Kim, Yu Ji
An APMP supplementary inter-comparison of loop antennas (9 kHz - 30 MHz) has been carried out between NMIJ, KRISS and NMIA. This summary describes the outline of the comparison and its progress so far. Measurement results will be presented at the conference (CPEM2014).
{"title":"APMP supplemetary comparison of loop antennas (APMP.EM.RF-S21.F)","authors":"M. Ishii, Jeong Hwan Kim, Yu Ji","doi":"10.1109/CPEM.2014.6898522","DOIUrl":"https://doi.org/10.1109/CPEM.2014.6898522","url":null,"abstract":"An APMP supplementary inter-comparison of loop antennas (9 kHz - 30 MHz) has been carried out between NMIJ, KRISS and NMIA. This summary describes the outline of the comparison and its progress so far. Measurement results will be presented at the conference (CPEM2014).","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124728298","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 : 2014-10-02DOI: 10.1109/CPEM.2014.6898367
Dongxue Dai, Xiaobing He, Pan Jin, Wei Wang
This paper describes a constant temperature control system for high accuracy standard capacitors developed by NIM. The system includes a constant temperature slot and temperature control circuit. Structure, material and some techniques on reducing the heat transfer of the constant temperature slot are discussed. The temperature control circuit based on PID automation control technology is used to control the slot internal temperature. The system has the resolution of 0.002 °C and the fluctuation of ±0.01 °C, and can reduce capacitance variation of the standard capacitors when the environment temperature changes. The system can improve the standard capacitors with higher accuracy and better stability.
{"title":"Constant temperature control system of standard capacitors","authors":"Dongxue Dai, Xiaobing He, Pan Jin, Wei Wang","doi":"10.1109/CPEM.2014.6898367","DOIUrl":"https://doi.org/10.1109/CPEM.2014.6898367","url":null,"abstract":"This paper describes a constant temperature control system for high accuracy standard capacitors developed by NIM. The system includes a constant temperature slot and temperature control circuit. Structure, material and some techniques on reducing the heat transfer of the constant temperature slot are discussed. The temperature control circuit based on PID automation control technology is used to control the slot internal temperature. The system has the resolution of 0.002 °C and the fluctuation of ±0.01 °C, and can reduce capacitance variation of the standard capacitors when the environment temperature changes. The system can improve the standard capacitors with higher accuracy and better stability.","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125459629","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 : 2014-10-02DOI: 10.1109/CPEM.2014.6898387
A. Bounouh, G. Almuneau, H. Baumgartner, A. Cuenat, N. Gambacorti, J. Hoffmann, R. Kern, F. Kienberger, J. Krupka, D. Lackner, B. Pollakowski, T. G. Rodriguez, F. Sametoğlu, L. Usydus, S. Winter, F. Witt
End of 2013 EURAMET, the European metrology organization opened a call to advance measurement science and technology in the field of Energy by providing funding for Joint Research Projects (JRP) to be funded jointly by the European Commission and the participating countries in the frame of the European Metrology Research Programme (EMRP). This paper describes a planned project; no technical results will be available at the time of the conference. We feel, however, that CPEM is a suitable platform to discuss our plans.
{"title":"The EMRP project Metrology for III–V materials based high efficiency multi-junction solar cells","authors":"A. Bounouh, G. Almuneau, H. Baumgartner, A. Cuenat, N. Gambacorti, J. Hoffmann, R. Kern, F. Kienberger, J. Krupka, D. Lackner, B. Pollakowski, T. G. Rodriguez, F. Sametoğlu, L. Usydus, S. Winter, F. Witt","doi":"10.1109/CPEM.2014.6898387","DOIUrl":"https://doi.org/10.1109/CPEM.2014.6898387","url":null,"abstract":"End of 2013 EURAMET, the European metrology organization opened a call to advance measurement science and technology in the field of Energy by providing funding for Joint Research Projects (JRP) to be funded jointly by the European Commission and the participating countries in the frame of the European Metrology Research Programme (EMRP). This paper describes a planned project; no technical results will be available at the time of the conference. We feel, however, that CPEM is a suitable platform to discuss our plans.","PeriodicalId":256575,"journal":{"name":"29th Conference on Precision Electromagnetic Measurements (CPEM 2014)","volume":"96 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127991926","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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