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A method of compensation of the frequency dependent systematic error of the time-division watt-converter using two multipliers 提出了一种利用双乘法器补偿时分功率变换器频率相关系统误差的方法
IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings Pub Date : 1997-05-19 DOI: 10.1109/IMTC.1997.612431
L. D. Jovanovic
{"title":"A method of compensation of the frequency dependent systematic error of the time-division watt-converter using two multipliers","authors":"L. D. Jovanovic","doi":"10.1109/IMTC.1997.612431","DOIUrl":"https://doi.org/10.1109/IMTC.1997.612431","url":null,"abstract":"The paper presents an original method for the compensation of the frequency dependent systematic error of the time-division multiplier (TDM). The method is based on two identical multipliers working at different conversion frequencies. Full compensation of the error can be achieved using simple calculation taking into account only the values of the output signals of the multipliers and the ratio of the conversion frequencies. It has been shown theoretically, by computer simulation that error of the method is less than +50/spl times/10/sup -6/ in the input signal frequency range up to one tenth of the lower conversion frequency. For the practical realization of the method there is no need to use two complete TDMs, but some simplifications are possible. Applying these simplifications a prototype watt-converter based on this method has been developed and results of measurements show that precision of +/-50/spl times/10/sup -6/ is achieved in the input frequency range from 50 Hz to 10 kHz if the lower conversion frequency is only 100 kHz.","PeriodicalId":124893,"journal":{"name":"IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings","volume":"195 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115653086","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
Special considerations for alternatively designed digital phase angle standard 可选设计的数字相角标准的特殊考虑
IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings Pub Date : 1997-05-19 DOI: 10.1109/IMTC.1997.603972
S. Ciglaric, D. Fefer, A. Jeglic
{"title":"Special considerations for alternatively designed digital phase angle standard","authors":"S. Ciglaric, D. Fefer, A. Jeglic","doi":"10.1109/IMTC.1997.603972","DOIUrl":"https://doi.org/10.1109/IMTC.1997.603972","url":null,"abstract":"Digital phase angle standards have become an ordinary piece of equipment in metrology laboratories all over the world. The paper proposes an approach to the design of such a reference source, that differs in some points from the conventional one. The main reasons for investigating alternative techniques were simplicity of their practical design and the flexibility in sense of phase angle and frequency setting (very wide range and resolution obtained even with constant sampling frequency). Important precautions are described that have to be considered in order to make the performance of the system as good as possible.","PeriodicalId":124893,"journal":{"name":"IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116153241","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
An object-oriented model of measurement systems 测量系统的面向对象模型
IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings Pub Date : 1997-05-19 DOI: 10.1109/IMTC.1997.604040
Qingping Yang, C. Butler
{"title":"An object-oriented model of measurement systems","authors":"Qingping Yang, C. Butler","doi":"10.1109/IMTC.1997.604040","DOIUrl":"https://doi.org/10.1109/IMTC.1997.604040","url":null,"abstract":"This paper presents a general object-oriented model for measurement systems. The limitations of the conventional function-oriented models are examined in the light of the generalised concept of measurement and its theoretical framework proposed previously by the author. The proposed model identifies five classes of objects, i.e. measured object, measuring instrument, reference standard, human observer and operating environment. Each of them is characterised by its own attributes and operations or functions at three levels, i.e. internal, operational and environmental. The interactions between them are also modelled including the coupling between the measured object and the measuring instrument, the human-instrument interface, the calibration and the interference. Together with the generalised concept of measurement and its philosophical framework, it serves as a practical tool for description, analysis and design, and, in particular, for computer aided analysis and design of a measuring system. It will find applications in instrumentation engineering and measurement education and research.","PeriodicalId":124893,"journal":{"name":"IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125266116","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: 38
Autocalibrating phase reference standard 自动校准相位参考标准
IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings Pub Date : 1997-05-19 DOI: 10.1109/IMTC.1997.612406
R. Lapuh, Z. Svetik
{"title":"Autocalibrating phase reference standard","authors":"R. Lapuh, Z. Svetik","doi":"10.1109/IMTC.1997.612406","DOIUrl":"https://doi.org/10.1109/IMTC.1997.612406","url":null,"abstract":"This paper describes an autocalibrating phase reference standard. Besides classical double direct digital synthesizer (DDS) design, it incorporates a novel phase angle detecting circuitry, which measures phase angle between two channels in real time. A new technique provides reference phase detecting scheme, which is independent of phase angle between two signals.","PeriodicalId":124893,"journal":{"name":"IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127717459","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
Force and moment calibration for NCKU 10 cm/spl times/10 cm magnetic suspension wind tunnel NCKU 10 cm/spl次/10 cm磁悬浮风洞的力力矩标定
IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings Pub Date : 1997-05-19 DOI: 10.1109/IMTC.1997.612363
C.E. Lin, Chengcheng Yang
{"title":"Force and moment calibration for NCKU 10 cm/spl times/10 cm magnetic suspension wind tunnel","authors":"C.E. Lin, Chengcheng Yang","doi":"10.1109/IMTC.1997.612363","DOIUrl":"https://doi.org/10.1109/IMTC.1997.612363","url":null,"abstract":"This paper presents measurement and calibration of the established NCKU 10 cm/spl times/10 cm magnetic suspension wind tunnel. The proposed wind tunnel is constructed based on a magnetic suspension balance system (MSBS). A calibration fixture with wire-ball bearings was designed for the experiments. Current measurements representing exerting forces and moments on the test model are obtained from externally applied loads on each degree of freedom. From the results, using the measurement data, a basic wind tunnel test to obtain the exerting force and moment in each degree of freedom on the test model can be obtained directly. This practical magnetic suspension wind tunnel can be used for aerodynamic tests.","PeriodicalId":124893,"journal":{"name":"IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128132809","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: 5
Implementation of a virtual network analyzer by means of VXI-based modules 利用基于vxi的模块实现了一个虚拟网络分析仪
IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings Pub Date : 1997-05-19 DOI: 10.1109/IMTC.1997.603951
G. Bucci, C. Landi
{"title":"Implementation of a virtual network analyzer by means of VXI-based modules","authors":"G. Bucci, C. Landi","doi":"10.1109/IMTC.1997.603951","DOIUrl":"https://doi.org/10.1109/IMTC.1997.603951","url":null,"abstract":"In this paper the implementation of a digital network analyzer based on the Virtual Instrument (VI) technique is presented. Hardware and software architectures of the implemented instrument are described in detail. In addition, test results obtained during the instrument performance analysis are reported.","PeriodicalId":124893,"journal":{"name":"IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings","volume":"63 Suppl 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128166409","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: 4
Measurement system for solar radiation 太阳辐射测量系统
IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings Pub Date : 1997-05-19 DOI: 10.1109/IMTC.1997.610265
R. Benghanem, A. Maafi
{"title":"Measurement system for solar radiation","authors":"R. Benghanem, A. Maafi","doi":"10.1109/IMTC.1997.610265","DOIUrl":"https://doi.org/10.1109/IMTC.1997.610265","url":null,"abstract":"We present in this paper the principles of the measurement system for solar radiation. The photocurrent produced by a silicon PN junction is used as a solar radiation transducer. Using a silicon solar cell as sensor, a low cost solar radiometer can be constructed. The photocurrent produced is electronically tailored to store solar radiation data in a microprocessor based data acquisition system. This portable instrument can be used in remote sites and substitutes solar monitor and integrator. The data can be transmitted by a RS 232C port, interfaceable with personal microcomputer. We developed a system hardware and software, based on MC 68B09 microprocessor, able to work in remote sites or linked to a laboratory. So, the global irradiation data are obtained after correction using the instantaneous measure of the ambient temperature which allows us to calculate the junction temperature and consequently improve the precision of measure of this measurement system.","PeriodicalId":124893,"journal":{"name":"IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126064620","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: 11
Calibration method of IVD by means of switched capacitors 利用开关电容标定IVD的方法
IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings Pub Date : 1997-05-19 DOI: 10.1109/IMTC.1997.604051
T. Skubis, A. Skórkowski
{"title":"Calibration method of IVD by means of switched capacitors","authors":"T. Skubis, A. Skórkowski","doi":"10.1109/IMTC.1997.604051","DOIUrl":"https://doi.org/10.1109/IMTC.1997.604051","url":null,"abstract":"The method of calibration of inductive voltage divider (IVD) based on switched capacitors is described. Algorithms minimizing influence of the error of RMS/DC converter as well as residual capacitances, are given. The method presented makes it possible to find the in-phase IVD error in the frequency range of up to 1 MHz.","PeriodicalId":124893,"journal":{"name":"IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127043877","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: 4
The registration of harmonic powers by analogue and digital power meters 用模拟功率表和数字功率表登记谐波功率
IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings Pub Date : 1997-05-19 DOI: 10.1109/IMTC.1997.603959
J. Driesen, T. Van Vraenenbroeck, D. van Dommelen
{"title":"The registration of harmonic powers by analogue and digital power meters","authors":"J. Driesen, T. Van Vraenenbroeck, D. van Dommelen","doi":"10.1109/IMTC.1997.603959","DOIUrl":"https://doi.org/10.1109/IMTC.1997.603959","url":null,"abstract":"This paper discusses the measurement error of energy meters operating under harmonic distortion. A system to determine the magnitude of the error caused by an individual harmonic is used to generate curves on which the error introduced by the different frequency components is displayed. An algorithm using this data to predict the resulting measurement error of a linearly operating energy meter registering under circumstances of any known harmonics in the voltage and the current is presented.","PeriodicalId":124893,"journal":{"name":"IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126389115","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
A uniform sampling of periodic signals using successive T/spl rarr/V/spl rarr/T conversion 采用连续T/spl rarr/V/spl rarr/T转换对周期信号进行均匀采样
IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings Pub Date : 1997-05-19 DOI: 10.1109/IMTC.1997.612410
P. Bosnjakovic, B. Djokic, M. Dohcevic-Jerotic
{"title":"A uniform sampling of periodic signals using successive T/spl rarr/V/spl rarr/T conversion","authors":"P. Bosnjakovic, B. Djokic, M. Dohcevic-Jerotic","doi":"10.1109/IMTC.1997.612410","DOIUrl":"https://doi.org/10.1109/IMTC.1997.612410","url":null,"abstract":"A new approach to uniform sampling-time generation presented here is based on successive signal conversions: from pulse to analogue and backward to pulse form. Two methods for fast response, jitter-free sampling-time generator design are described, providing accurate sampling of periodic signals.","PeriodicalId":124893,"journal":{"name":"IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126571257","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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