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Journal of Measurement Science and Instrumentation最新文献

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Research on the improvement of the time-interleaved high speed digitizer's resolution with offset dither 利用偏移抖动提高时间交错高速数字化仪分辨率的研究
Journal of Measurement Science and Instrumentation Pub Date : 2001-05-21 DOI: 10.1109/IMTC.2001.928900
Xie Ben-Zhao, Lin Mao-liu, Quan Tai-fan
{"title":"Research on the improvement of the time-interleaved high speed digitizer's resolution with offset dither","authors":"Xie Ben-Zhao, Lin Mao-liu, Quan Tai-fan","doi":"10.1109/IMTC.2001.928900","DOIUrl":"https://doi.org/10.1109/IMTC.2001.928900","url":null,"abstract":"This paper presents the principle of improving the time-interleaved high speed digitizer's resolution with offset dither in a deterministic approach. We first derive the output signal representation of the interleaved digitizer, and then present a detailed spectrum analysis of the additional signal produced by offset difference with sinusoid input. It is found that the major power of the additional signal is located in the high frequency section, so we can filter out the additional signal to increase the system resolution. Finally, computer simulation that obtains the relationship curve between the system ENOB and the input signal frequency, is given.","PeriodicalId":68878,"journal":{"name":"Journal of Measurement Science and Instrumentation","volume":"37 1","pages":"660-664 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2001-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81608126","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
An intelligent ultrasonic flowmeter for improved flow measurement and flow calibration facility 一种智能超声波流量计，用于改进流量测量和流量校准设施
Journal of Measurement Science and Instrumentation Pub Date : 2001-05-21 DOI: 10.1109/IMTC.2001.929499
T. T. Yeh, P. I. Espina, S. Osella
{"title":"An intelligent ultrasonic flowmeter for improved flow measurement and flow calibration facility","authors":"T. T. Yeh, P. I. Espina, S. Osella","doi":"10.1109/IMTC.2001.929499","DOIUrl":"https://doi.org/10.1109/IMTC.2001.929499","url":null,"abstract":"An increasing need for reduced uncertainty has forced metrologists to look for novel ways to improve the calibration standards for flow. The NIST is experimenting with the use of an advanced ultrasonic flowmeter (AUFM) to improve flow measurement and to detect the dynamic properties of calibration facilities. Ultrasonic technology is evolving rapidly and technical advances have significantly improved flow measurement in continuous industrial processes. The AUFM couples multipath ultrasonic sensing capabilities with pattern recognition software to predict likely flow fields and their probability of existence. The knowledge encoded in the AUFM is derived from training exercises that use computational fluid dynamics and experimental results to teach a flow field recognizer (FFR) via a learning algorithm. A four-path ultrasonic flowmeter prototype has been used to demonstrate the AUFM operational principle. Results showed that the four-path meter can successfully identify flow patterns among several selected flow fields. The results also indicated that the ability of the FFR to identify flow patterns increases as the accuracy of the sensor increases, while decreases as the number of flow patterns considered increases. In addition to being used as a flow diagnostic tool, the AUFM could prove beneficial in field applications where installation effects can lead to gross errors when ultrasonic signals are evaluated using conventional integration techniques.","PeriodicalId":68878,"journal":{"name":"Journal of Measurement Science and Instrumentation","volume":"31 1","pages":"1741-1746 vol.3"},"PeriodicalIF":0.0,"publicationDate":"2001-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84226934","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: 33
Identification of physical parameters of a flexible structure from noisy measurement data 从噪声测量数据中识别柔性结构的物理参数
Journal of Measurement Science and Instrumentation Pub Date : 2001-05-21 DOI: 10.1109/IMTC.2001.928293
A. Ohsumi, Nobuhide Nakano
{"title":"Identification of physical parameters of a flexible structure from noisy measurement data","authors":"A. Ohsumi, Nobuhide Nakano","doi":"10.1109/IMTC.2001.928293","DOIUrl":"https://doi.org/10.1109/IMTC.2001.928293","url":null,"abstract":"We focus our attention on an inverse problem for identifying physical parameters such as Young's modulus and air and structural damping coefficients in a mathematical model of cantilevered beams subject to random disturbance, using dynamic noisy data measured on their vibrations taken in a non-destructive manner. First, we describe mathematical models of the cantilevered beam by an Euler-Bernoulli type partial differential equation including unknown parameters subject to random disturbance and the measurement equation taking vibration data including the observation noise. The identification problem using random dynamic data is divided into an estimation problem obtaining the (modal) state estimate and a least-squares problem determining unknown parameters, and then the unknown parameters are determined recursively by using two algorithms alternately. Finally, in order to verify the efficacy of the proposed algorithm simulation studies and experiments are shown.","PeriodicalId":68878,"journal":{"name":"Journal of Measurement Science and Instrumentation","volume":"62 1","pages":"1354-1359 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2001-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84970167","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: 10
Design of an integrated angular sensor system 集成角度传感器系统的设计
Journal of Measurement Science and Instrumentation Pub Date : 2001-05-21 DOI: 10.1109/IMTC.2001.928855
N. Kero, T. Sauter
{"title":"Design of an integrated angular sensor system","authors":"N. Kero, T. Sauter","doi":"10.1109/IMTC.2001.928855","DOIUrl":"https://doi.org/10.1109/IMTC.2001.928855","url":null,"abstract":"Sensor systems based on capacitive or inductive measurement principles usually require sophisticated analog and digital signal processing. Particularly in automotive applications, a high degree of integration with as few external components as possible is desirable. We describe the design of an integrated angular speed sensor system based on a carrier frequency approach. To optimize the performance, we combined a synchronous demodulation strategy with an external resonance filter serving as clock reference and noise protection. The filter was extended by an additional low-pass easing implementation of the demodulator and compensating for internal signal delays. For system simulation, a simple analytical model based on Fourier synthesis was found to be superior to a conventional SPICE simulation.","PeriodicalId":68878,"journal":{"name":"Journal of Measurement Science and Instrumentation","volume":"70 1","pages":"433-436 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2001-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85129390","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: 14
Measurement and identification of mobile radio propagation channels 移动无线电传播信道的测量和识别
Journal of Measurement Science and Instrumentation Pub Date : 2001-05-21 DOI: 10.1109/IMTC.2001.928261
R. Thoma, D. Hampicke, A. Richter, G. Sommerkorn
{"title":"Measurement and identification of mobile radio propagation channels","authors":"R. Thoma, D. Hampicke, A. Richter, G. Sommerkorn","doi":"10.1109/IMTC.2001.928261","DOIUrl":"https://doi.org/10.1109/IMTC.2001.928261","url":null,"abstract":"MIMO vector radio channel sounding devices allow multidimensional analysis of wave propagation in mobile radio channels. 6-dimensions represent Doppler, TDOA, 2D DOD and 2D DOA. Antenna array architectures, calibration and K-D unitary ESPRIT parameter estimation are discussed. Parametric channel models can be derived from the estimated data.","PeriodicalId":68878,"journal":{"name":"Journal of Measurement Science and Instrumentation","volume":"39 1","pages":"1163-1170 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2001-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78565372","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
Safe design of CANopen distributed instruments CANopen分布式仪器的安全设计
Journal of Measurement Science and Instrumentation Pub Date : 2001-05-21 DOI: 10.1109/IMTC.2001.929504
E. Benoit, A. Chovin, L. Foulloy, A. Chatenay, G. Mauris
{"title":"Safe design of CANopen distributed instruments","authors":"E. Benoit, A. Chovin, L. Foulloy, A. Chatenay, G. Mauris","doi":"10.1109/IMTC.2001.929504","DOIUrl":"https://doi.org/10.1109/IMTC.2001.929504","url":null,"abstract":"This paper presents a modeling for the safe design of intelligent instruments distributed on a CANopen fieldbus. This paper briefly recalls the service-based USOM/INOM modelling technique, then shows how this technique can be apply to a safe design of CANopen distributed instruments. An example of design of an instrument which is compatible with the CiA DSP-401 standardized profile of I/O modules, is used to illustrate these concepts.","PeriodicalId":68878,"journal":{"name":"Journal of Measurement Science and Instrumentation","volume":"99 1","pages":"1768-1772 vol.3"},"PeriodicalIF":0.0,"publicationDate":"2001-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78344700","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
Harmonic analysis of current waveforms using optical current sensor 基于光学电流传感器的电流波形谐波分析
Journal of Measurement Science and Instrumentation Pub Date : 2001-05-21 DOI: 10.1109/IMTC.2001.929522
W. Michie, A. Cruden, P. Niewczas, W. Madden, J. R. McDonald, Mathieu Gauguin
{"title":"Harmonic analysis of current waveforms using optical current sensor","authors":"W. Michie, A. Cruden, P. Niewczas, W. Madden, J. R. McDonald, Mathieu Gauguin","doi":"10.1109/IMTC.2001.929522","DOIUrl":"https://doi.org/10.1109/IMTC.2001.929522","url":null,"abstract":"This work reports on the research and development of an optical current sensor for harmonic analysis within the electricity supply network. The device has a measurement capability, limited by the sampling frequency of the A/D converter, to around 20 kHz. We report on experimental verification of these measurements up to the 80th harmonic (4 kHz).","PeriodicalId":68878,"journal":{"name":"Journal of Measurement Science and Instrumentation","volume":"61 1","pages":"1863-1865 vol.3"},"PeriodicalIF":0.0,"publicationDate":"2001-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78348176","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: 13
A partial discharge data acquisition system based on programmable digital oscilloscopes 基于可编程数字示波器的局部放电数据采集系统
Journal of Measurement Science and Instrumentation Pub Date : 2001-05-21 DOI: 10.1109/IMTC.2001.928229
H. Mota, F. Vasconcelos
{"title":"A partial discharge data acquisition system based on programmable digital oscilloscopes","authors":"H. Mota, F. Vasconcelos","doi":"10.1109/IMTC.2001.928229","DOIUrl":"https://doi.org/10.1109/IMTC.2001.928229","url":null,"abstract":"This paper describes a partial discharge measurement system based on a programmable digital oscilloscope. The system enables the acquisition of partial discharge data both on phase-resolved and time-resolved basis, thus allowing these two analyses. After the acquisition of partial discharge data, statistical operators are applied over the phase distributions, as a way to identify the type of defect present on the equipment under test and its corresponding degradation level. To check for the system performance and develop an initial database on partial discharges, it was used to measure partial discharges in air and solid insulation, and their main characteristics were determined. These measurements were carried out in a measurement cell developed with great care to prevent signal deterioration, allowing the registration of almost distortion-free PD pulses.","PeriodicalId":68878,"journal":{"name":"Journal of Measurement Science and Instrumentation","volume":"30 4 1","pages":"994-999 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2001-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72922186","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
Analytical calculation of the impedance of lossy power/ground planes 损耗功率/地平面阻抗的解析计算
Journal of Measurement Science and Instrumentation Pub Date : 2001-05-21 DOI: 10.1109/IMTC.2001.928228
B. Eged, L. Balogh
{"title":"Analytical calculation of the impedance of lossy power/ground planes","authors":"B. Eged, L. Balogh","doi":"10.1109/IMTC.2001.928228","DOIUrl":"https://doi.org/10.1109/IMTC.2001.928228","url":null,"abstract":"Power and ground planes are required to have low impedance over a wide range of frequencies. Parallel ground and power planes in multilayer printed-circuit boards exhibit multiple resonances, which increase the impedance. Dissipative loading the radial transmission line structure of the planes reducing the peaks of the resonances. The dissipative loads can be realized by resistors distributed on the surface or edges of plain pairs and lossy dielectric material can be applied for distributed loading. Calculations based on the analytical method and measurements results are presented for comparing to the calculated and simulated impedances.","PeriodicalId":68878,"journal":{"name":"Journal of Measurement Science and Instrumentation","volume":"75 1","pages":"989-993 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2001-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73303871","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: 12
Application of multitone signals in room acoustics measurements 多音信号在室内声学测量中的应用
Journal of Measurement Science and Instrumentation Pub Date : 2001-05-21 DOI: 10.1109/IMTC.2001.928882
I. Pellejero, M. Zivanovic, Ixone Arroabarren, A. Carlosena
{"title":"Application of multitone signals in room acoustics measurements","authors":"I. Pellejero, M. Zivanovic, Ixone Arroabarren, A. Carlosena","doi":"10.1109/IMTC.2001.928882","DOIUrl":"https://doi.org/10.1109/IMTC.2001.928882","url":null,"abstract":"This paper addresses the problem of measuring the acoustic frequency response of auditoria and loudspeaker characterization. The difficulty of the problem is illustrated with a number of measurements performed using different methods and equipment. The use of multitone signals both uniformly and logarithmically spaced is proposed to obtain fast and reproducible measurements.","PeriodicalId":68878,"journal":{"name":"Journal of Measurement Science and Instrumentation","volume":"34 1","pages":"566-571 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2001-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73355220","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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