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IEEE Instrumentation & Measurement Magazine

Issue 4 • Date Dec. 2001

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Displaying Results 1 - 10 of 10
  • Accelerated stress testing handbook -guide for achieving quality products [Book Review]

    Publication Year: 2001, Page(s): 69
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    Freely Available from IEEE
  • Author index

    Publication Year: 2001, Page(s):70 - 71
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    Freely Available from IEEE
  • Subject index

    Publication Year: 2001, Page(s):71 - 76
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    Freely Available from IEEE
  • Computer simulation of a pulse-forming network

    Publication Year: 2001, Page(s):20 - 22
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1473 KB)

    Computer simulation allowed research scientists at TRIUMF to achieve the tightest specification to date for a pulse-forming network (PFN). The 66 kV PFN, designed for use by CERN has a measured ripple in the flattop of only ±3%. This is a much flatter pulse than the ±1% ripple that was previously state of the art for these devices. The TRIUMF researchers attribute their ability to ac... View full abstract»

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  • Least-squares fitting of data by polynomials

    Publication Year: 2001, Page(s):46 - 51
    Cited by:  Papers (14)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (318 KB) | HTML iconHTML

    In the last two columns, we looked at one approach to approximation, interpolating a set of points by piecewise-cubic polynomials forming a cubic spline. We now look at another approach - one that involves fitting a curve to a set of data without restricting that curve to coincide with the data points. Our focus is on least-squares approximation, and, in particular, least-square fitting of polynom... View full abstract»

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  • Line-pantograph EMI in railway systems

    Publication Year: 2001, Page(s):10 - 13
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1788 KB) | HTML iconHTML

    At present, the EN50121 standards are the main reference for electromagnetic compatibility in European railway systems. These standards should improve as technology and testing develops. Therefore, major sources of EMI in a railway environment need to be better understood. This study is complex because many different railway power systems exist in Europe (1.5 kV DC, 3 kV DC, 15 kV 16.7 Hz, 25 kV 5... View full abstract»

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  • Thermal noise in a finite bandwidth

    Publication Year: 2001, Page(s):23 - 25
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (353 KB) | HTML iconHTML

    In a practical circuit, the output noise due to the thermal noise of a resistor will depend on the actual transfer function of the noise source. The bandwidth will never be infinite because the transfer function of either the noise source or the device measuring the output noise will cause limitations. Consequently, the thermal noise voltage of a resistor in a finite bandwidth is maximum for a giv... View full abstract»

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  • Continuous monitoring of a capacitor bank

    Publication Year: 2001, Page(s):14 - 19
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5075 KB) | HTML iconHTML

    We have developed a prototype system for safety assurance of a capacitor bank by combining application-specific and off-the-shelf surveillance technology for remote monitoring. Traditional surveillance technology passively records facility operations, waiting for an event to trigger a physical audit of the collected information. We have implemented a more active approach to remote monitoring and u... View full abstract»

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  • Fitting transducer characteristics to measured data

    Publication Year: 2001, Page(s):26 - 39
    Cited by:  Papers (44)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2790 KB) | HTML iconHTML

    There are no rules to select the best curve-fitting method for a given set of data. This problem is of great importance in measurement applications. Optimizing analog and digital methods for a transducer's characteristic interpolation or linearization is a field where constant research is being done, particularly since auto-calibration and self-test of intelligent transducers is a topic of major i... View full abstract»

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  • Time domain reflectometry liquid level sensors

    Publication Year: 2001, Page(s):40 - 44
    Cited by:  Papers (45)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (361 KB) | HTML iconHTML

    The technique of time domain reflectometry (TDR) has been used by electrical engineers for testing the characteristics of transmission lines and diagnosing faults. Although TDR instruments for testing cable are commonly used today, few instrumentation engineers are aware that the technique can measure liquid levels and fluid interfaces. In this article, I review the theory and principles of time d... View full abstract»

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Editor-in-Chief
Prof. Wendy Van Moer

wendy.w.vanmoer@ieee.org
IandMMagazineEIC@ieee.org