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Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

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Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
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In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
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Here is a stepwise guide to assessing the body temperature at the temporal artery using a temporal artery thermometer
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Study on Spatiotemporal Variation in Internal Temperature Field in Quartz Flexible Accelerometer.

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Summary

Quartz flexible accelerometers (QFAs) are sensitive to temperature changes, causing errors. This study models internal QFA temperatures to improve accuracy, finding significant internal temperature variations during transient phases.

Keywords:
heat transfer simulation modelquartz flexible accelerometertemperature fieldunsteady heat conduction

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Area of Science:

  • Sensor Technology
  • Metrology
  • Thermal Engineering

Background:

  • Quartz flexible accelerometers (QFAs) are susceptible to temperature-induced drift and stability errors.
  • Current error correction methods rely on external shell temperatures, limiting accuracy during transient heat conduction.
  • A gap exists in effectively sensing and modeling internal component temperatures for QFAs.

Purpose of the Study:

  • To investigate the heat exchange dynamics between the interior and exterior of a QFA.
  • To elucidate the temperature discrepancy between the QFA shell and its internal components.
  • To support the development of internal temperature-based error correction methods for QFAs.

Main Methods:

  • Established a thermal conduction simulation model for the QFA.
  • Derived spatiotemporal distribution patterns of the internal temperature field.
  • Validated the model against experimental results, achieving an average RMSE of 0.4 °C.

Main Results:

  • The QFA shell temperature changes faster than internal components during initial temperature shifts.
  • Significant spatiotemporal temperature gradients exist inside the QFA before thermal equilibrium.
  • Key internal components like the yoke iron and servo circuit show distinct temperature variations.

Conclusions:

  • Internal QFA temperature distribution is uneven in time and space during transient phases.
  • Accurate internal temperature prediction is crucial for mitigating QFA errors.
  • The developed thermal model provides a foundation for enhanced QFA temperature error correction.