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A Realization Of Fail-Safe Sensor Using Electromagnetic Induction 电磁感应故障安全传感器的实现
1988 Conference on Precision Electromagnetic Measurements Pub Date : 1988-06-07 DOI: 10.1109/CPEM.1988.671200
K. Futsuhara, M. Mukaidono
{"title":"A Realization Of Fail-Safe Sensor Using Electromagnetic Induction","authors":"K. Futsuhara, M. Mukaidono","doi":"10.1109/CPEM.1988.671200","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671200","url":null,"abstract":"This paper describes a realization of fail-safe sensor by using electromagnetic induction. The transducer coils are stationed on a plate for magnifying the sensitivity. The optimum construction for train detection is determined based on measurement patterns. This sensor has two complimentary outputs for the fail-safe processing.","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":"132280972","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: 7
Research Activities on Standard Time and Frequency Signal Dissemination Using Communication Satellite Links 利用通信卫星链路进行标准时频信号传播的研究活动
1988 Conference on Precision Electromagnetic Measurements Pub Date : 1988-06-07 DOI: 10.1109/CPEM.1988.671209
Xiao Cuiying
{"title":"Research Activities on Standard Time and Frequency Signal Dissemination Using Communication Satellite Links","authors":"Xiao Cuiying","doi":"10.1109/CPEM.1988.671209","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671209","url":null,"abstract":"Standard time and frequency signal dissemination systrms using communication satellite links developed at the National Institute of Metrology(N1M) are described. In our country the standard time and frequency signal dissemination techniques via satellite have been developed since 1979. We have done some researches on standard time and frequency signal dissemination via satellites surh as SYMPHONIE , IS-V, and chinese experimental communication satellite STM-1. Based on the results of these researches, The domestic standard time and frequency signal dissemination system U S P S the chinese experimentat communication satellite STM-1 and broadcasting communication satellite in addition to the ordinary links of ground TV and Loran-C. The systems for international time and frequency transfers depend on the spacr techniques of the The experiments were used one-way and two-way techniques. using spread-spertrum techniques thr precision of less than Ins (0.15111) and an acrurary of Ions (3m) have been obtained. GI'S, loran-C and other system.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"49 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":"134342031","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
A 10 kW Class Calorimeter for CW-CO/sub 2/ Laser Power Measurements 10kw级量热计，用于CW-CO/sub - 2/激光功率测量
1988 Conference on Precision Electromagnetic Measurements Pub Date : 1988-06-07 DOI: 10.1109/CPEM.1988.671369
F. Uchiyama, K. Tukamoto, S. Shiratori, I. Yokoshima, S. Ishigami, K. Hasiguchi
{"title":"A 10 kW Class Calorimeter for CW-CO/sub 2/ Laser Power Measurements","authors":"F. Uchiyama, K. Tukamoto, S. Shiratori, I. Yokoshima, S. Ishigami, K. Hasiguchi","doi":"10.1109/CPEM.1988.671369","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671369","url":null,"abstract":"f low measurement of coolan t w a t e r I n t r o d u c t i o n This paper d e s c r i b e s an a c c u r a t e ca lor imeter which can measure high power CW-COp laser output a t power l e v e l of 100 W t o 10 kW w i t h an accuracy Of 1 %. The ca lor imeter c o n s i s t s of a water cooled double cone type o p t i c a l absorber . O p t i c a l power i s determined from temperature r ise i n t h e coolan t w a t e r of t h e absorber measured w i t h one of a p a i r of q u a r t z thermosensor. The ca lor imeter can be c a l i b r a t e d t o AC o r DC power.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"14 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":"132834008","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
A Re-Evaluation of the NML Absolute OHM and Quantized Hall Resistance Determinations 对NML绝对欧姆和量子化霍尔电阻测定的再评价
1988 Conference on Precision Electromagnetic Measurements Pub Date : 1988-06-07 DOI: 10.1109/CPEM.1988.671376
B. W. Ricketts, G. Small
{"title":"A Re-Evaluation of the NML Absolute OHM and Quantized Hall Resistance Determinations","authors":"B. W. Ricketts, G. Small","doi":"10.1109/CPEM.1988.671376","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671376","url":null,"abstract":"The NML calculable capacitor has been examined for possible adjustment errors and for the effects of wear. A new program of measurements relating the 1-/spl Omega/ standards to the calculable capacitor and to the QHR has been conducted, and the results are presented.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"80 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":"133245211","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
Optical Frequency Standards: Present Status And Prospects For The Future 光频率标准:现状与展望
1988 Conference on Precision Electromagnetic Measurements Pub Date : 1988-06-07 DOI: 10.1109/CPEM.1988.671149
J. Helmcke
{"title":"Optical Frequency Standards: Present Status And Prospects For The Future","authors":"J. Helmcke","doi":"10.1109/CPEM.1988.671149","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671149","url":null,"abstract":"Progress in the fields of laser frequency stabilization, optical frequency measurements, and high resolution laser spectroscopy opens the possibility to develop optical frequency standards of unpreceded low uncertainty. Basic concepts of such standards are discussed and first experimental results are reviewed. The lowest frequency uncertainties are expected from standards based on slow atomic beams or on stored and cooled ions.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"82 3 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":"116412461","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
Measurements with a Fourier Transform Wavemeter 用傅里叶变换波长计进行测量
1988 Conference on Precision Electromagnetic Measurements Pub Date : 1988-06-07 DOI: 10.1109/CPEM.1988.671270
M. Junttila, T. Veijola, B. Ståhlberg
{"title":"Measurements with a Fourier Transform Wavemeter","authors":"M. Junttila, T. Veijola, B. Ståhlberg","doi":"10.1109/CPEM.1988.671270","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671270","url":null,"abstract":"In this paper we describe the results of wavelength comparisons of lasers done with a Fourier Transform (FT) spectrometer in the visible and near infrared region. The spectrometer employs the Fast Fourier Transformation (FFT) routine to determine absolute wavelengths and mode structures of mono- and multi-mode lasers relative to a stabilized He-Ne (633 nm) laser.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"28 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":"123562649","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
Determination of the Dissipative Loss in Low-Loss Two-Ports 低损耗双端口耗散损耗的测定
1988 Conference on Precision Electromagnetic Measurements Pub Date : 1988-06-07 DOI: 10.1109/CPEM.1988.671292
W. Wiatr
{"title":"Determination of the Dissipative Loss in Low-Loss Two-Ports","authors":"W. Wiatr","doi":"10.1109/CPEM.1988.671292","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671292","url":null,"abstract":"The dissipative loss of a reciprocal two-port can be determined from its input reflection coefficients measured while terminating the output with load, short and open circuits, and sliding short. The paper presents a statistical approach applied to minimize random errors of the loss determination.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"17 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":"123770033","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
The Design Of Kalman Smoothers For Global Positioning Data 全球定位数据的卡尔曼平滑设计
1988 Conference on Precision Electromagnetic Measurements Pub Date : 1988-06-07 DOI: 10.1109/CPEM.1988.671205
M. Weiss
{"title":"The Design Of Kalman Smoothers For Global Positioning Data","authors":"M. Weiss","doi":"10.1109/CPEM.1988.671205","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671205","url":null,"abstract":"Measurements of clocks aboard Global Positioning System (GPS) satellites as well as GPS system time are made many times per day at time standards laboratories around the world according to a tracking schedule issued by the Bureau International des Poids et Mesures (International Bureau of Weights and Measures). We compute Kalman smoothed estimates of clocks in the standards labs to define a global time base, then compute Kalman smoothed estimates of GPS clocks against this time base. Biases in measurements repeated once per sidereal day produce apparent diurnal effects in the data. A composite time and frequency Kalman estimator is used here. This allows updates of clocks at time intervals less than one day while aliasing diurnal variations.","PeriodicalId":326579,"journal":{"name":"1988 Conference on Precision Electromagnetic Measurements","volume":"22 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":"123790786","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
Industrial Experience with an Intelligent AC/DC Standard 具有智能AC/DC标准的行业经验
1988 Conference on Precision Electromagnetic Measurements Pub Date : 1988-06-07 DOI: 10.1109/CPEM.1988.671266
D. Fefer, J. Drnovsek, A. Jeglic
{"title":"Industrial Experience with an Intelligent AC/DC Standard","authors":"D. Fefer, J. Drnovsek, A. Jeglic","doi":"10.1109/CPEM.1988.671266","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671266","url":null,"abstract":"AC-DC voltage standards based entirely on solid state references, used as secondary, working or transfer standards, are widely used although metrological performance is typically defined only via comparison with a higher level standard. Present report shows the possibilities of the special programme support that has the capacity to define the current level of measurement accuracy within certain limits, and hence to adjust the output parameters.","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":"122334897","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
Present International Status of Microwave Power Standards 微波功率标准的国际现状
1988 Conference on Precision Electromagnetic Measurements Pub Date : 1988-06-07 DOI: 10.1109/CPEM.1988.671246
V. Agrawal, P. C. Kothari, K. Chandra
{"title":"Present International Status of Microwave Power Standards","authors":"V. Agrawal, P. C. Kothari, K. Chandra","doi":"10.1109/CPEM.1988.671246","DOIUrl":"https://doi.org/10.1109/CPEM.1988.671246","url":null,"abstract":"This paper presents an upto date informatlon on various techniques being used for the precise measurement of microwave power in National Standards Laboratories of various countries includinq the capabilities attained by NPL, India in this field. Various aspects, such as design and fabrication, operational simplicity, limitations, etc., of the techniques have been discussed. The uncertainty achieved in the determination of effective efficiency of the mounts by different techniques has also been given.","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":"130192650","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
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