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Related Concept Videos

Temperature Dependent Deformation01:12

Temperature Dependent Deformation

149
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...
149
Thermosensation01:43

Thermosensation

30.4K
Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
30.4K
Deformation of Member under Multiple Loadings01:11

Deformation of Member under Multiple Loadings

166
When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
166
Temperature Measurement Sites01:14

Temperature Measurement Sites

1.7K
A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
1.7K
Thermal Strain01:19

Thermal Strain

1.3K
Thermal strain is a concept that arises when we consider how temperature changes affect structures. Unlike the conventional assumption that structures remain constant under load, real-world scenarios often involve temperature fluctuations that can significantly impact these structures. Consider a homogeneous rod with a uniform cross-section resting freely on a flat horizontal surface. If the rod's temperature increases, the rod elongates. This elongation is proportional to the temperature...
1.3K
Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

1.0K
Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
Glass-bulb Thermometer:
Glass-bulb thermometers are hollow glass tubes with a bulb tip containing liquid such as ethanol or mercury. Historically, glass bulb mercury thermometers were the standard device to measure body temperature. Today, mercury thermometers are prohibited in many countries due to the hazardous effects of mercury and the risk of exposure if the glass bulb breaks. In general,...
1.0K

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Related Experiment Video

Updated: Jul 10, 2025

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Published on: November 7, 2016

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Multi-modal deformation and temperature sensing for context-sensitive machines.

Robert Baines1,2, Fabio Zuliani2, Neil Chennoufi2

  • 1School of Engineering & Applied Science, Yale University, 9 Hillhouse Avenue, New Haven, CT, 06520, USA.

Nature Communications
|November 18, 2023
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Summary
This summary is machine-generated.

This study introduces a novel multi-modal sensor that mimics human skin. The sensor detects various physical stimuli, including deformation and temperature, using light properties for advanced human-robot interaction.

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Area of Science:

  • Robotics
  • Materials Science
  • Biomimetic Engineering

Background:

  • Human skin provides high-fidelity sensory feedback through its complex somatosensory system.
  • Current robotic systems often rely on multiple specialized sensors, limiting cohesive and information-dense perception.
  • Advanced human-robot interfaces and soft robotics require sophisticated proprioception capabilities.

Purpose of the Study:

  • To develop a single, cohesive sensing technology capable of detecting multiple physical stimuli.
  • To achieve biological levels of proprioception in robotic systems.
  • To create an information-dense sensor for diverse human-robot and environmental interactions.

Main Methods:

  • A multi-modal sensor was engineered using patterned elastomer doped with functional dyes.
  • The sensor leverages changes in light chromaticity and intensity to detect stimuli.
  • An opto-thermo-mechanical assay was employed to study the sensor's working principle.

Main Results:

  • The sensor successfully decodes omnidirectional bending, compression, stretch, and binary temperature changes.
  • A one-to-one mapping was established between combined stimulus modes and sensor output.
  • The sensor demonstrates high information density from a single sensing element.

Conclusions:

  • The developed sensor offers a pathway towards bio-inspired robotic proprioception.
  • This technology enables the deciphering of complex interactions in human-robot and environmental contexts.
  • The sensor's multi-modal capabilities address limitations in current robotic sensing technologies.