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1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)最新文献

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Automatic bridge for comparison of inductances based on difference voltage measurement 基于差分电压测量的电感比较自动电桥
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254) Pub Date : 1998-07-06 DOI: 10.1109/CPEM.1998.699810
A. K. Saxena, M. Saleem
{"title":"Automatic bridge for comparison of inductances based on difference voltage measurement","authors":"A. K. Saxena, M. Saleem","doi":"10.1109/CPEM.1998.699810","DOIUrl":"https://doi.org/10.1109/CPEM.1998.699810","url":null,"abstract":"An inductance bridge to compare inductors by 1:1 substitution method is proposed. This bridge is based on difference voltage measurement. Uncertainties of less that 0.01% are possible for inductors from 1 mH to 100 mH at 1 kHz.","PeriodicalId":239228,"journal":{"name":"1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115368594","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}
引用次数: 2
Superconductor digital-to-analog converter based on processing of SFQ pulses 基于SFQ脉冲处理的超导体数模转换器
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254) Pub Date : 1998-07-06 DOI: 10.1109/CPEM.1998.700136
V. Semenov, P. Shevchenko, Y. Polyakov
{"title":"Superconductor digital-to-analog converter based on processing of SFQ pulses","authors":"V. Semenov, P. Shevchenko, Y. Polyakov","doi":"10.1109/CPEM.1998.700136","DOIUrl":"https://doi.org/10.1109/CPEM.1998.700136","url":null,"abstract":"Recently we designed and successfully tested a prototype of a superconducting digital-to-analog converter (DAC) based on processing single flux quantum (SFQ) pulses. Two unique features make the device very attractive for metrology applications: (i) The generation of output voltage is based on the fundamentally accurate Josephson frequency-to-voltage relationship. (ii) The device does not require any external signals with frequencies higher than 100 MHz. It is expected that the DAC will be used as a key component of novel standards and calibrators of ac voltage with frequency up to 1 MHz. The implemented prototype has low magnitude of output voltage (about 10 mV) which is far lower than the 1 to 10 V target magnitude.","PeriodicalId":239228,"journal":{"name":"1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115413681","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}
引用次数: 9
A system to measure current transducer performance 一种测量电流传感器性能的系统
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254) Pub Date : 1998-07-06 DOI: 10.1109/CPEM.1998.699903
B. Waltrip, T. Nelson
{"title":"A system to measure current transducer performance","authors":"B. Waltrip, T. Nelson","doi":"10.1109/CPEM.1998.699903","DOIUrl":"https://doi.org/10.1109/CPEM.1998.699903","url":null,"abstract":"A special purpose ac current transducer measurement system capable of intercomparing transducers with ac output voltage ratios from 1:1 to 50:1 has been developed to extend the range and accuracy of current transformer, current shunt, and mutual inductor calibrations at power frequencies of 50 Hz and 60 Hz. The system consists of a two-stage binary inductive voltage divider, an amplifier-aided two-stage current transformer, a precision shunt, a wideband buffer, and a commercial, sampling digital multimeter (DMM). When comparing current transducers with ac output voltage ratios of 1:1 to 50:1, the system attains an overall relative standard uncertainty of the ratio of 10/sup -5/ to 10/sup -4/, respectively. The basic system can be used to calibrate transducers with input currents of 0.1 A to 200 A (RMS) and can be extended to measure devices handling input currents up to 15 kA.","PeriodicalId":239228,"journal":{"name":"1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124392923","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}
引用次数: 3
Self calibrating phase standard 自校准相位标准
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254) Pub Date : 1998-07-06 DOI: 10.1109/CPEM.1998.699904
R. Lapuh, I. Visocnik, Z. Svetik
{"title":"Self calibrating phase standard","authors":"R. Lapuh, I. Visocnik, Z. Svetik","doi":"10.1109/CPEM.1998.699904","DOIUrl":"https://doi.org/10.1109/CPEM.1998.699904","url":null,"abstract":"A phase standard, consisting of clock coupled phase generator and phase meter, is proposed. Phase generator is build around two direct digital synthesizers. Phase meter incorporates a single a/d converter and a floating point. A novel approach uses a/d converter in successive sampling of two signals and compensating for an introduced phase shift by taking into account a time interval between two sampling bursts.","PeriodicalId":239228,"journal":{"name":"1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114659089","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}
引用次数: 1
DC 10:1 Hamon divider with cryogenic contacts DC 10:1带低温触点的哈蒙分压器
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254) Pub Date : 1998-07-06 DOI: 10.1109/CPEM.1998.699803
Kyu-Tae Kim, Sung-Won Kwon
{"title":"DC 10:1 Hamon divider with cryogenic contacts","authors":"Kyu-Tae Kim, Sung-Won Kwon","doi":"10.1109/CPEM.1998.699803","DOIUrl":"https://doi.org/10.1109/CPEM.1998.699803","url":null,"abstract":"A study on a DC Hamon divider with superconducting contacts (cryo-contacts Hamon divider) is described. The contact resistance error of the switch had been one of the most significant error sources in the conventional Hamon divider. A specially designed cryogenic switch made of Pb was used at liquid helium temperature for a series-parallel connection of the Hamon resistors which form the upper arm of a Wheatstone bridge for a self calibration. The 10:1 ratio uncertainty of the preliminary measurement is expected to easily reach a 0.1 ppm level.","PeriodicalId":239228,"journal":{"name":"1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117067095","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}
引用次数: 0
Development of a self-calibration precision electrical measuring meter 一种自校准精密电测量仪的研制
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254) Pub Date : 1998-07-06 DOI: 10.1109/CPEM.1998.699905
Y. Liu, Qingyu Liu
{"title":"Development of a self-calibration precision electrical measuring meter","authors":"Y. Liu, Qingyu Liu","doi":"10.1109/CPEM.1998.699905","DOIUrl":"https://doi.org/10.1109/CPEM.1998.699905","url":null,"abstract":"This presentation describes a mathematical analog model, method of calibration, circuit characteristics and error analysis of electrical energy, power, voltage and current meter at power frequency based on a self-calibration principle. Results of comparison of the prototype meters and their test results are also presented.","PeriodicalId":239228,"journal":{"name":"1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117267600","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}
引用次数: 6
Frequency standard based on /sup 192/OsO/sub 4/ /spl nu//sub 3/P(46)A/sup 2//sub 2/ fundamental line 频率标准基于/sup 192/OsO/sub 4/ /spl nu//sub 3/P(46)A/sup 2//sub 2/基线
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254) Pub Date : 1998-07-06 DOI: 10.1109/CPEM.1998.699971
M. Paola Sassi, M. Zucco
{"title":"Frequency standard based on /sup 192/OsO/sub 4/ /spl nu//sub 3/P(46)A/sup 2//sub 2/ fundamental line","authors":"M. Paola Sassi, M. Zucco","doi":"10.1109/CPEM.1998.699971","DOIUrl":"https://doi.org/10.1109/CPEM.1998.699971","url":null,"abstract":"We report the frequency value of the /sup 192/OsO/sub 4/ /spl nu//sub 3/P(46)A/sup 2//sub 2/ line, measured with respect to the hot line absorption in coincidence with the same CO/sub 2/ 10P(14) line, using a transportable CO/sub 2//OsO/sub 4/ standard.","PeriodicalId":239228,"journal":{"name":"1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117275419","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}
引用次数: 0
Power standard based on a high precision power-factor meter 基于高精度功率因数计的功率标准
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254) Pub Date : 1998-07-06 DOI: 10.1109/CPEM.1998.700046
D. Slomovitz, C. Faverio
{"title":"Power standard based on a high precision power-factor meter","authors":"D. Slomovitz, C. Faverio","doi":"10.1109/CPEM.1998.700046","DOIUrl":"https://doi.org/10.1109/CPEM.1998.700046","url":null,"abstract":"A high-precision power-factor meter, based on zero crossing detectors, is proposed. The influence of the distortion in the input signals is analyzed and low pass filters proposed to prevent this error source. This system is proposed as a new power standard meter, based on the measurement of voltage, current and power factor.","PeriodicalId":239228,"journal":{"name":"1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127165607","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}
引用次数: 2
Accuracy evaluation of the optically pumped Cs frequency standard at NRLM NRLM光泵浦Cs频率标准精度评价
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254) Pub Date : 1998-07-06 DOI: 10.1109/CPEM.1998.699734
K. Hagimoto, S. Ohshima, Y. Nakadan, Y. Koga
{"title":"Accuracy evaluation of the optically pumped Cs frequency standard at NRLM","authors":"K. Hagimoto, S. Ohshima, Y. Nakadan, Y. Koga","doi":"10.1109/CPEM.1998.699734","DOIUrl":"https://doi.org/10.1109/CPEM.1998.699734","url":null,"abstract":"To evaluate the accuracy of the optically pumped Cs frequency standard at NRLM (NRLM-4), we measured its frequency stability and the frequency difference between NRLM-4 and the international atomic time (TAI).","PeriodicalId":239228,"journal":{"name":"1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125017755","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}
引用次数: 28
A method for calibration of partial discharge calibrators 局部放电校准器的校准方法
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254) Pub Date : 1998-07-06 DOI: 10.1109/CPEM.1998.699868
O. Gunnarsson, A. Bergman, K. Rydler
{"title":"A method for calibration of partial discharge calibrators","authors":"O. Gunnarsson, A. Bergman, K. Rydler","doi":"10.1109/CPEM.1998.699868","DOIUrl":"https://doi.org/10.1109/CPEM.1998.699868","url":null,"abstract":"A method for calibration of partial discharge calibrators has been developed based on passive integration of the induced charge. The voltage over a known capacitor is measured by a calibrated digital sampling voltmeter and the charge is calculated as the voltage multiplied by the capacitance. The best achieved uncertainty is /spl plusmn/2% for a coverage factor k=2.","PeriodicalId":239228,"journal":{"name":"1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254)","volume":"46 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125901919","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}
引用次数: 16
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