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Equipments Used to Measure Body Temperature

Equipments Used to Measure Body Temperature

Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
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Related Experiment Video

Updated: Jul 12, 2025

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

Simultaneous Measurement of Microdisplacement and Temperature Based on Balloon-Shaped Structure.

Yaxun Zhang^1,2,3, Yuxin Liu^1,2,3, Zhiliang Huang^1,2,3

¹Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao 266500, China.

Sensors (Basel, Switzerland)

|October 28, 2023

Summary

This study introduces an optical fiber sensor for simultaneous microdisplacement and temperature measurement. The novel design offers high sensitivity and a compact structure for diverse applications.

Keywords:

balloon-shaped single mode fiber core-offset joints microdisplacement multimode interference temperature sensor

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Last Updated: Jul 12, 2025

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

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Published on: September 30, 2019

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

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Thermal Measurement Techniques in Analytical Microfluidic Devices

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Area of Science:

Optoelectronics
Fiber Optics Sensors
Interferometry

Background:

Simultaneous measurement of microdisplacement and temperature is crucial for structural health monitoring.
Existing sensors often lack the sensitivity or compactness required for certain applications.

Purpose of the Study:

To propose and demonstrate a novel optical fiber sensor capable of simultaneously measuring microdisplacement and temperature.
To investigate the performance characteristics of the proposed sensor, including sensitivity and dynamic range.

Main Methods:

A sensor design integrating a balloon-shaped single-mode fiber interferometer with a Fiber Bragg Grating (FBG).
Utilizing core-offset joints to stimulate cladding modes and induce interference.
Analyzing shifts in interference fringes and Bragg wavelength in response to external stimuli.

Main Results:

The sensor achieved a microdisplacement sensitivity of 0.306 nm/µm over a 0-200 μm range.
Temperature sensitivity was measured at 0.165 nm/°C.
The sensor demonstrated simultaneous measurement capabilities with distinct responses to displacement and temperature.

Conclusions:

The proposed optical fiber sensor enables accurate and simultaneous measurement of microdisplacement and temperature.
The sensor exhibits high sensitivity, a compact structure, and simple preparation, making it suitable for structural safety monitoring, aviation, and resource exploration.