Pub Date : 1988-06-07DOI: 10.1109/CPEM.1988.671338
Z. Shi, Jia Yao Lan, Zhang Gui rong, Zhang You Feng, Guo Feng Ying
A new thermal power comparator of audio frequency has been developed, which is essentially a double bridge-type multipliers comprlsed of two multijunction thermal converters, containing two heaters. Together with a precision inductive voltage divider and current transformer for extending voltage and current range, the comparator enables establish a high precision power standard with ac-dc transfer error less than 15 ppm in audio frequency range.
{"title":"A New Power Standard of Audio Frequency","authors":"Z. Shi, Jia Yao Lan, Zhang Gui rong, Zhang You Feng, Guo Feng Ying","doi":"10.1109/CPEM.1988.671338","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671338","url":null,"abstract":"A new thermal power comparator of audio frequency has been developed, which is essentially a double bridge-type multipliers comprlsed of two multijunction thermal converters, containing two heaters. Together with a precision inductive voltage divider and current transformer for extending voltage and current range, the comparator enables establish a high precision power standard with ac-dc transfer error less than 15 ppm in audio frequency range.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133833589","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 : 1988-06-07DOI: 10.1109/CPEM.1988.671304
B. Wood, A. D. Inglis
We report on the progress towards the establishment of a quantum Hall resistance measurement system suitable for maintaining OHM NRC. This new system will be described and compared to the previously reported 15T, 20 mK potentiometric system. General problems concerning utilization of the Hall resistance as a unit will be discussed.
{"title":"Comparison of the Quantum Hall Resistance and OHM NRC","authors":"B. Wood, A. D. Inglis","doi":"10.1109/CPEM.1988.671304","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671304","url":null,"abstract":"We report on the progress towards the establishment of a quantum Hall resistance measurement system suitable for maintaining OHM NRC. This new system will be described and compared to the previously reported 15T, 20 mK potentiometric system. General problems concerning utilization of the Hall resistance as a unit will be discussed.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123131693","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 : 1988-06-07DOI: 10.1109/CPEM.1988.671199
A. Murakami, K. Hosaka, M. Fukushima, N. Tsuya
It was found that the thickness of amorphous ribbons changed periodically and the period in length corresponded to the circumference of the quenching roll. The accuracy of the mass-produced digitizer was improved by taking into account this periodicity to select the even ribbons in thickness.
{"title":"Amorphous Ribbons Used for a Magnetostrictive Digitizer","authors":"A. Murakami, K. Hosaka, M. Fukushima, N. Tsuya","doi":"10.1109/CPEM.1988.671199","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671199","url":null,"abstract":"It was found that the thickness of amorphous ribbons changed periodically and the period in length corresponded to the circumference of the quenching roll. The accuracy of the mass-produced digitizer was improved by taking into account this periodicity to select the even ribbons in thickness.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124481585","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 : 1988-06-07DOI: 10.1109/CPEM.1988.671189
M. Hashimoto, M. Ohtou
Light shift of rubidium atomic clock was accurately measured. By controlling the laser frequency detuning based on the results of the measurements, the microwave frequeney inaccuracy of a rubidium atomic clock was reduced to t3.2x10/sup -11/.
{"title":"Improvement of frequency accuracy in a zemicondoctor laser pumped /sup 87/Rb atomic clock","authors":"M. Hashimoto, M. Ohtou","doi":"10.1109/CPEM.1988.671189","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671189","url":null,"abstract":"Light shift of rubidium atomic clock was accurately measured. By controlling the laser frequency detuning based on the results of the measurements, the microwave frequeney inaccuracy of a rubidium atomic clock was reduced to t3.2x10/sup -11/.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125046606","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 : 1988-06-07DOI: 10.1109/CPEM.1988.671273
N. Hagiwara, Y. Nishitani, M. Yanase, T. Saegusa
A method of improving the resolution and reliability of a laser interferometer which is used for measuring displacement is proposed. By giving code numbers to the divided segments of the interference fringe interval, the theoretical resolution is improved up to 1/170 of the light wave length. As the error caused by environmental noise is not integrated, the reliability is improved.
{"title":"A Spatial Encoding Method for Improving the Resolution and Reliability of Laser Interferometers","authors":"N. Hagiwara, Y. Nishitani, M. Yanase, T. Saegusa","doi":"10.1109/CPEM.1988.671273","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671273","url":null,"abstract":"A method of improving the resolution and reliability of a laser interferometer which is used for measuring displacement is proposed. By giving code numbers to the divided segments of the interference fringe interval, the theoretical resolution is improved up to 1/170 of the light wave length. As the error caused by environmental noise is not integrated, the reliability is improved.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"535 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125240248","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 : 1988-06-07DOI: 10.1109/CPEM.1988.671298
A. Murakami, S. Yamamoto, T. Yamanami
We designed a new coordinate measuring equipment that uses the LC resonant circuit. The pointing devices of this equipment have no cords and no batteries and dose not directly contact the sensor board. It can measure coordinates at an accuracy of up to 0.1mm and also detect the state of the switch.
{"title":"Development of Coordinate Measuring Equipment Using Electromagnetic Give and Receive Action Method","authors":"A. Murakami, S. Yamamoto, T. Yamanami","doi":"10.1109/CPEM.1988.671298","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671298","url":null,"abstract":"We designed a new coordinate measuring equipment that uses the LC resonant circuit. The pointing devices of this equipment have no cords and no batteries and dose not directly contact the sensor board. It can measure coordinates at an accuracy of up to 0.1mm and also detect the state of the switch.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131712327","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 : 1988-06-07DOI: 10.1109/CPEM.1988.671373
A. Y. AlMazroo, J. Toscano, A. Elshabini-Riad
A technique for modeling multilayer thick film components using time domain measurements is presented. A multilayer inductor, formed by stacking spiral coils vertically with intervening dielectric layer, is used to demonstrate the technique. The component under test is placed at the end of a reference line, and a TDR waveform is acquired. A physically based model is developed to fit the TDR information.
{"title":"Modeling of Multilayer Thick Film Components Using Time Domain Techniques","authors":"A. Y. AlMazroo, J. Toscano, A. Elshabini-Riad","doi":"10.1109/CPEM.1988.671373","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671373","url":null,"abstract":"A technique for modeling multilayer thick film components using time domain measurements is presented. A multilayer inductor, formed by stacking spiral coils vertically with intervening dielectric layer, is used to demonstrate the technique. The component under test is placed at the end of a reference line, and a TDR waveform is acquired. A physically based model is developed to fit the TDR information.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131534814","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 : 1988-06-07DOI: 10.1109/CPEM.1988.671176
L. Grno
The theory and the example of the concrete configuration of the bridge for three-terminal admittance measurement with selfcalibration ability is described. The new approach enabled to realize a simple bridge circuit with non-iterative calibration procedure which allows to meet the highest metrological requirements.
{"title":"The new concept of three-terminal admittance bridge with selfcalibration ability","authors":"L. Grno","doi":"10.1109/CPEM.1988.671176","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671176","url":null,"abstract":"The theory and the example of the concrete configuration of the bridge for three-terminal admittance measurement with selfcalibration ability is described. The new approach enabled to realize a simple bridge circuit with non-iterative calibration procedure which allows to meet the highest metrological requirements.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131302653","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 : 1988-06-07DOI: 10.1109/CPEM.1988.671359
Wang Zhi, Sun Shenghe, Liu Yue
A calibration method using four short air tines with different length is introduced in this paper. It is more precise than Li's method because tesst square principle is used to resolve contradictory equation in the presence of noise [1], and more simple than Hoer's method because only linear equation and formula resolution are used in calculation [2].
{"title":"The Six-Port Four Standards Linear Least Square Calibration Method","authors":"Wang Zhi, Sun Shenghe, Liu Yue","doi":"10.1109/CPEM.1988.671359","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671359","url":null,"abstract":"A calibration method using four short air tines with different length is introduced in this paper. It is more precise than Li's method because tesst square principle is used to resolve contradictory equation in the presence of noise [1], and more simple than Hoer's method because only linear equation and formula resolution are used in calculation [2].","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133857500","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 : 1988-06-07DOI: 10.1109/CPEM.1988.671251
L. Shiguang
This report presents an overview of recent developments on VLBI in Shanghai Observatory. The Shanghai Radio Station equipped with 25 meter antenna and other facilities was operational last year. The VLBI data processing system has been set up recently. It includes the S-2 VLBI data processor and a series of post correlation processing programs for astronomy as well as geodesy.
{"title":"Progress in VLBI at Shanghai Observatory","authors":"L. Shiguang","doi":"10.1109/CPEM.1988.671251","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671251","url":null,"abstract":"This report presents an overview of recent developments on VLBI in Shanghai Observatory. The Shanghai Radio Station equipped with 25 meter antenna and other facilities was operational last year. The VLBI data processing system has been set up recently. It includes the S-2 VLBI data processor and a series of post correlation processing programs for astronomy as well as geodesy.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"630 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132960690","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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