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Instrumentation and Measurement Technology Conference Proceedings, 2007. IMTC 2007. IEEE

Date 1-3 May 2007

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Displaying Results 1 - 25 of 499
  • [Front cover]

    Page(s): C1
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  • Copyright page

    Page(s): nil1
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  • [Title page]

    Page(s): C2
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  • Table of contents

    Page(s): i
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  • Welcome message

    Page(s): ii - iii
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  • Plenary Poster Session

    Page(s): v
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  • Panel Discussion - Extending the Frontiers of Space Measurement

    Page(s): v
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    There is a resurgence in space exploration activity. In 2004, the US announced plans to return to the moon by 2020. Supporting this new mission requires a new generation of launch and exploration vehicles. Recently, China's space program has placed astronauts into orbit and is planning crewed lunar exploration missions by the end of the next decade. The remarkable photographs returned by the Mars rovers and the longevity of the rovers have underscored the promise of autonomous exploration vehicles. Rutan's company, Scaled Composites, won the X Prize in 2004; we may be on the brink of a new wave of commercial and tourist access to space. Panelists will provide brief position statements amplifying the unique aspects of their work as they relate to significant challenges of measurements in support of space exploration. The discussion led by the panel will explore the ramifications for the measurement community. During the remaining portion of the session, panelists and session attendees will discuss mechanisms for furthering technical interchange at future conferences and workshops. View full abstract»

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  • IMTC 2007 Tutorials

    Page(s): vi
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  • Awards and distinctions

    Page(s): vii - x
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  • 2007 IEEE Fellow Awards

    Page(s): xi - xiv
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  • IMTC 2007 Sponsor

    Page(s): xv
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  • IMTC 2007 Executive Committee

    Page(s): xvi
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  • IMTC 2007 International Board of Advisors

    Page(s): xvii
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  • IMTC 2007 Technical Program Committee

    Page(s): xvii - xx
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  • IMTC Board of Directors

    Page(s): xx
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  • IMTC Tradition

    Page(s): xxi
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  • Call for papers

    Page(s): xxii
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  • IEEE Instrumentation and Measurement Society

    Page(s): xxiii - xxviii
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  • IMTC 2007 Technical Program Tracks & Sessions

    Page(s): 1 - 67
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  • Characterization of Thermoelectric Modules for Powering Autonomous Sensors

    Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2346 KB) |  | HTML iconHTML  

    The characterization of three commercial thermoelectric modules, designed for cooling/heating applications, is presented in order to employ the devices for power conversion, i.e as thermoelectric generators (TEG). The thermoelectric theory is briefly described at first, also taking into account the relationship between effective temperature difference across the TEG junctions and temperature difference applied externally, when insulating ceramic plates have a finite thermal conductance. Performances of thermoelectric modules are evaluated in terms of open-circuit output voltage and output power density for different temperature gradients and load conditions. Measurement techniques and experimental data are reported, showing the possibility of use thermoelectric devices for waste heat recover. A TEG was then used to supply an autonomous system that interfaces with a temperature sensor and periodically transmits the measurement information via a radiofrequency (RF) link. Experimental data show that the system works correctly and sends the RF signal when temperature difference applied across TEG is high enough. View full abstract»

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  • Investigation to the Use of Vibration Energy for Supply of Hearing Aids

    Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1723 KB) |  | HTML iconHTML  

    Using ambient energy, the operation time of batteries in mobile applications can be increased and the acceptability by the user can be improved. In this paper we investigate the possibilities to design hearing aids as power aware system scavenging energy directly from its environment. The energy source we consider is vibration produced by movements primarily in the neighbourhood of the ear and other movements of the human body. Experimental measurements of vibration were evaluated by means of a theoretical model. The results show that an interesting improvement of battery operation time can be reached. View full abstract»

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  • On the Use of Decoupling Capacitors in Autonomous Sensors

    Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1879 KB) |  | HTML iconHTML  

    Power consumption is a major design constraint in low power systems such as autonomous sensors. A strategy to reduce power consumption and extend autonomy is to use low power devices with shutdown control and enable them only at specific times. An alternative strategy is to turn off the supply voltage of those devices that are not being used at a given time. In this case, however, power supply decoupling capacitors might dispensed more energy than the devices they protect. In this work we analyze whether or not conducted interference justifies the use of decoupling capacitors in autonomous sensors. Based on a case study, we present simple models for conducted interference and power and energy consumption. The results show that interference in power supply lines because of microprocessor activity in autonomous sensors is often small enough as to make most decoupling capacitors dispensable for analogue and mixed-signal devices sharing the same power line. An energy consumption analysis leads to a criterion to select the best optimal power management strategy. In low latency systems, the best is to turn off the supply voltage when not in measuring mode. These results depend on the particular layout, and also on the PSRR of the particular devices used, but the models provided can help in deciding which devices need decoupling capacitors and selecting the best power management strategy. View full abstract»

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  • Investigation on Coupling Strategies for Wireless Implant Communications

    Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (9000 KB) |  | HTML iconHTML  

    Monitoring of human vital functions is enabled by wireless technologies for distributed on-body mounted monitoring sensors. Galvanic coupling provides a novel data communication between sensors with coupling electrodes attached to the human skin. The next step is an implantable communication device. This study focuses on coupling strategies for intra-body communication between implantable miniaturized transceiver pills. View full abstract»

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