Strain Gauge

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M.p. Sarina - One of the best experts on this subject based on the ideXlab platform.

  • Polysilicon Strain-Gauge transducers
    Sensors and Actuators A-physical, 1992
    Co-Authors: Victor A Gridchin, V.m. Lubimskyi, M.p. Sarina
    Abstract:

    Abstract Strain-Gauge transducers with polysilicon resistors can be used successfully in various sensors. They have some advantages in comparison to monocrystalline silicon Strain-Gauge transducers. However, not enough information is available for the qualitative design of such transducers. The theoretical principles of the temperature dependence of the output signal for a constant supply voltage and constant supply current are described. A polysilicon Strain-Gauge transducer with a square diaphragm fabricated on the discussed principles is reported. It has an operating temperature range of −190- +300 °C, and weak temperature dependence of the output signal.

Joh M Toole - One of the best experts on this subject based on the ideXlab platform.

  • implementation of a titanium Strain Gauge pressure transducer for ctd applications
    Deep Sea Research Part I: Oceanographic Research Papers, 1993
    Co-Authors: Robe C Millard, Gary Ond, Joh M Toole
    Abstract:

    Abstract The installation and operational characteristics of a titanium element Strain Gauge pressure sensor in conductivity-temperature-depth (CTD) instruments is described. The behavior of the sensor is examined in both steady state and transient conditions, the latter consisting of thermal shocks achieved in laboratory plunge tests. The titanium pressure sensor has superior linearity and reduced hysteresis as compared with Strain Gauges which utilize a stainless steel lement. However, significant transient pressure errors are noted for certain Gauge installations. A model of the pressure sensor's transient is developed from heat transfer theory, which is solved for an idealization of the Mark III CTD configuration. This, in turn, motivates a numerical procedure for reducing the thermally-induced static and transient pressure error in the titanium Strain Gauge pressure sensor data, and an installation procedure that thermally isolates the Gauge. Residual pressure error in calibrated data from the titanium Strain Gauge is an acceptably fraction of a decibar.

Victor A Gridchin - One of the best experts on this subject based on the ideXlab platform.

  • Polysilicon Strain-Gauge transducers
    Sensors and Actuators A-physical, 1992
    Co-Authors: Victor A Gridchin, V.m. Lubimskyi, M.p. Sarina
    Abstract:

    Abstract Strain-Gauge transducers with polysilicon resistors can be used successfully in various sensors. They have some advantages in comparison to monocrystalline silicon Strain-Gauge transducers. However, not enough information is available for the qualitative design of such transducers. The theoretical principles of the temperature dependence of the output signal for a constant supply voltage and constant supply current are described. A polysilicon Strain-Gauge transducer with a square diaphragm fabricated on the discussed principles is reported. It has an operating temperature range of −190- +300 °C, and weak temperature dependence of the output signal.

Robe C Millard - One of the best experts on this subject based on the ideXlab platform.

  • implementation of a titanium Strain Gauge pressure transducer for ctd applications
    Deep Sea Research Part I: Oceanographic Research Papers, 1993
    Co-Authors: Robe C Millard, Gary Ond, Joh M Toole
    Abstract:

    Abstract The installation and operational characteristics of a titanium element Strain Gauge pressure sensor in conductivity-temperature-depth (CTD) instruments is described. The behavior of the sensor is examined in both steady state and transient conditions, the latter consisting of thermal shocks achieved in laboratory plunge tests. The titanium pressure sensor has superior linearity and reduced hysteresis as compared with Strain Gauges which utilize a stainless steel lement. However, significant transient pressure errors are noted for certain Gauge installations. A model of the pressure sensor's transient is developed from heat transfer theory, which is solved for an idealization of the Mark III CTD configuration. This, in turn, motivates a numerical procedure for reducing the thermally-induced static and transient pressure error in the titanium Strain Gauge pressure sensor data, and an installation procedure that thermally isolates the Gauge. Residual pressure error in calibrated data from the titanium Strain Gauge is an acceptably fraction of a decibar.

Phil Chowienczyk - One of the best experts on this subject based on the ideXlab platform.

  • Assessment of forearm vasodilator responses to acetylcholine and albuterol by Strain Gauge plethysmography: reproducibility and influence of Strain Gauge placement
    British journal of clinical pharmacology, 2001
    Co-Authors: H. A. Walker, Graham Jackson, James M. Ritter, Phil Chowienczyk
    Abstract:

    Aims  To determine the within-subject reproducibility of the forearm blood flow response to acetylcholine and the β2-adrenoceptor agonist albuterol as measured by Strain Gauge plethysmography. To examine the influence of Strain Gauge placement on these responses. Methods  Vasodilator response to brachial artery infusion of drugs was assessed by Strain Gauge plethysmography in six healthy men on each of three occasions separated by 1 week. Strain Gauges were placed on both arms at the point of maximum diameter. On the infused arm two further Gauges were positioned approximately 4 cm proximal and distal to the middle Gauge. Results  Within-subject coefficients of variation (WCV) of absolute blood flow responses for each dose of acetylcholine (7.5, 15, 30 µg min−1) ranged from 24% to 27%, as compared with WCV values of 41% to 62% for the percentage changes in blood flow ratio (infused : noninfused arm). For albuterol (0.3, 1, 3 µg min−1) the corresponding WCV values were 16% to 19% and 30% to 55% for absolute blood flow and percentage change in blood flow ratio, respectively. WCV for the area under dose-response curve (AUC) for absolute blood flow was 18% and 13% for acetylcholine and albuterol, respectively. Vasodilator responses were similar whether recorded proximal to or at the point of maximal forearm circumference. Distal Strain Gauge misplacement underestimated responses and the difference was greater for acetylcholine than for albuterol. Conclusions  In healthy men, the WCV for responses expressed as absolute blood flow, to acetylcholine and albuterol ranges from 16% to 27%.