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Instrumentation & Measurement Magazine, IEEE

Issue 1 • Date February 2010

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Displaying Results 1 - 19 of 19
  • IEEE Instrumentation & Measurement Magazine - Front cover

    Page(s): c1
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  • Table of contents

    Page(s): 2
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  • We can, but should we? [From the Editor's Bench]

    Page(s): 4
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  • Greetings [President's Perspectives]

    Page(s): 6
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  • 2010 I2MTC - Call for presentations

    Page(s): 7
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  • Spread spectrum techniques in wireless communication Part 2: Transmission issues in free space

    Page(s): 8 - 14
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3494 KB) |  | HTML iconHTML  

    The second part of Spread Spectrum Techniques in Wireless Communication focuses on wireless transmission issues and implementation of a water quality assessment wireless system. I present concepts of electromagnetic propagation, some important issues in open space electromagnetic transmission particularly when a transmission link is over a conductive surface, and a simplified analysis of common occurrences that impair the transmission's quality or can even block the communication between network nodes. I introduce the primary techniques that are used to mitigate open space propagation problems, giving particular attention to solutions that can be used to mitigate fading effects in spread spectrum communication systems. Then, I present experimental results of a wireless transmission system used in water quality assessment. View full abstract»

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  • Load cells in force sensing analysis -- theory and a novel application

    Page(s): 15 - 19
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2410 KB) |  | HTML iconHTML  

    Load cells have long been used to sense and measure force and torque. When properly designed and used, they are very accurate and reliable sensors. Load cells are applied in several different fields, usually for weighing measurements. Among many other things, food, vehicles, and animals are weighed daily with load cells. The gripper of a robotic arm that picks up an object can be equipped with load cells in order to provide compression force feedback to the control system to prevent the object from being damaged or released too early. Also, load cells can be used to sense the compression forces during a robot's walk to provide data for the equilibrium-controlling system. In industrial machinery, rods, beams, wheels and bars are instrumented in order to check the forces exerted on them. The volume or level of a tank can be measured indirectly by means of a load cell that monitors the total weight. Lift units can also have a load's total weight measured to prevent overload. Because of such a variety of possible applications, load cells are very important. This paper describes some of the theory and practice of load cells, including their basic elements and the electronics necessary for measurement. As an application example, the development of a 3-ring spherical load cell is presented which can be used to measure compression forces on fruit during storage and transportation is presented. View full abstract»

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  • A do-it-yourself approach to securing patent protection, part 1 in a series on protecting your inventions with limited resources

    Page(s): 20 - 22
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1262 KB) |  | HTML iconHTML  

    This series will present some procedural guidance for entrepreneurs and inventors who would otherwise either not pursue protection for their inventions, or would file a patent application pro se without the input of a qualified patent practitioner. It can be beyond the budget of many inventors having a professional patent practitioner draft and file a patent application. The topics discussed in this series will focus exclusively on patents and will not cover other forms of intellectual property (IP) such as trademarks and copyrights. View full abstract»

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  • Software defined radio: Part 22 in a series of tutorials on instrumentation and measurement

    Page(s): 23 - 32
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    A software defined radio (SDR) is a communication system that performs many of its required signal processing tasks in a programmable digital signal processing (DSP) engine. The engine is coupled to the air interface of analog circuits and antennae by analog-to-digital and digital-to-analog converters (ADCs and DACs). The SDR's software reprograms the DSP segment of the radio's physical layer to reconFigure the radio system parameters and can thus synthesize multiple radios. The software can also select and alter the air interface components as well as the higher level data processing layers of the radio system. View full abstract»

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  • Quality engineering tools used to design & optimize a mobile measurement station [Instrumentation Notes]

    Page(s): 33 - 38
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    During the design and construction of a distributed measurement system, design engineers face many basic questions. How does one properly choose a structure and actual solutions for the key elements of the system? Which elements are important? How does one guarantee a suitable level of operating quality and reliability? A broad knowledge base and technical experience are necessary to answer these questions. The consumer's expectations for the product need to be met. The designer's subjectivity should be minimized. In this column, we discuss the use of two tools, the Quality Function Deployment (QFD) method which comes from quality engineering rules and the Analytic Hierarchy Process (AHP) which comes from operations research. Implementing QFD during the design process can focus the attention of the designer on the most important elements of reliability and work quality. The AHP method helps the engineer make complex decisions in designing today's measurement systems that have many extreme optimization problems. Using these methods should decrease the cost of manufacturing and maintenance of measuring systems. We explain these methods and then show how they work in designing a distributed system for a mobile measurement station (MMS). View full abstract»

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  • Magnetic levitation [My Favorite Experiment]

    Page(s): 39 - 41
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    Magnetic levitation is experimented in this article using diamagnetic materials, namely water in the form of a grape and pyrolytic graphite and neodymium magnets to prove Earnshaw's theorem. View full abstract»

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  • World-wide recognition of National Measurement Standards: ten years of the CIPM MRA [Recalibration]

    Page(s): 42 - 46
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2295 KB) |  | HTML iconHTML  

    The information in this report on CIPM MRA has been published in many places and is open access on the BIPM web site. The purpose of the CIPM MRA was to formalize the previous international comparisons of national standards that had traditionally been carried out by the major NMIs of the world and to extend the recognition gained for their national standards to cover also their calibration and measurement certificates. Ten years later, the CIPM MRA covered some 200 institutes in 72 countries as well as two international organizations, the International Atomic Energy Agency and the Laboratories of the European Union at Geel, Belgium. The results of the key comparisons and the calibrations services meeting the requirements of the quality systems are put on a public database maintained by the BIPM known as the BIPM Key Comparison Database (KCDB). View full abstract»

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  • Student ambassadors [Membership Notes]

    Page(s): 47
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  • New products

    Page(s): 48 - 53
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  • Society News

    Page(s): 54 - 55
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  • 2010 I2MTC - Call for papers

    Page(s): 56
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  • IEEE I2MTC 2010 Tutorials

    Page(s): 57
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  • Calendar

    Page(s): 58
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  • The 2010 IEEE Instrumentation & Measurement Society

    Page(s): 60
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Aims & Scope

IEEE Instrumentation and Measurement Magazine contains applications-oriented and tutorial articles on topics in the broadly based areas of instrumentation system design and measurement techniques.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Prof. Wendy Van Moer

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