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Related Concept Videos

Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

1.4K
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,...
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Temperature Measurement Sites01:14

Temperature Measurement Sites

2.5K
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...
2.5K
Assessing Body Temperature - Tympanic membrane01:14

Assessing Body Temperature - Tympanic membrane

862
Assessing tympanic membrane temperature involves using a tympanic membrane thermometer (TMT). Here is a step-by-step guide:
Step 1: Begin by practicing good hand hygiene to prevent the transmission of microorganisms.
Step 2: Turn on the thermometer and wait until the ready sign appears on the screen to ensure accurate measurement.
Step 3: Slide the probe cover in place to prevent cross-contamination.
Step 4: Instruct the patient to tilt their head to the side for comfort and check for cerumen...
862
Assessing Body Temperature - Temporal Artery01:19

Assessing Body Temperature - Temporal Artery

780
Here is a stepwise guide to assessing the body temperature at the temporal artery using a temporal artery thermometer
Step 1: Perform hand hygiene and don a fresh pair of gloves to prevent cross-infection and ensure patient safety.
Step 2: Explain the procedure to the patient to establish trust. Clear communication establishes trust with the patient, ensures they understand what to expect, promotes cooperation, and enhances comfort during the procedure.  
Step 3: Assess the patient's...
780
Mechanisms of Heat Transfer II01:20

Mechanisms of Heat Transfer II

3.8K
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
3.8K
Assessing Body Temperature - Rectal01:27

Assessing Body Temperature - Rectal

8.3K
Rectal temperature measurement is considered the most precise method for assessing core body temperature and typically registers higher than oral temperature. For adults, the rectal thermometer should be inserted 1 to 1.5 inches into the rectum to obtain the most accurate reading.
Follow these steps for rectal temperature assessment:
Step 1: Perform hand hygiene and don clean gloves to prevent cross-infection.
Step 2: Position the patient in a side-lying position to better visualize the rectal...
8.3K

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Near-Infrared Temperature Measurement Technique for Water Surrounding an Induction-heated Small Magnetic Sphere
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Indirect Temperature Measurement in High Frequency Heating Systems.

Alexander Oskolkov1, Igor Bezukladnikov2, Dmitriy Trushnikov1

  • 1Department of Welding Production, Metrology and Technology of Material, Perm National Research Polytechnic University, 29 Komsomolsky Prospect, 614990 Perm, Russia.

Sensors (Basel, Switzerland)
|April 30, 2021
PubMed
Summary

This study introduces a novel indirect temperature measurement method for fused deposition modeling (FDM)/fused filament fabrication (FFF) 3D-printing. This rapid control system enhances layer adhesion and material homogeneity in 3D-printed objects.

Keywords:
3D-printingFDMFFFHF heatingeddy-currentindirect measurementinduction heatingregression analysisresonancetemperature measurement

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Area of Science:

  • Additive Manufacturing
  • Materials Science
  • Control Systems Engineering

Background:

  • Fused Deposition Modeling (FDM)/Fused Filament Fabrication (FFF) 3D-printing faces challenges in achieving consistent layer-to-layer adhesion and material homogeneity.
  • Maintaining precise control over extruded material temperature is crucial for mitigating these quality issues.

Purpose of the Study:

  • To propose and validate a novel approach for rapid and reliable control of extruded material temperature in FDM/FFF 3D-printing.
  • To develop an indirect temperature measurement method utilizing high-frequency induction heating and eddy current principles.

Main Methods:

  • Implementation of a high-frequency induction heating system with a low-mass nozzle (<1 g) and high peak power (>300 W).
  • Development of an indirect temperature measurement technique based on dynamic analysis of temperature-dependent parameters and eddy current principles.
  • Design of a series-parallel resonant circuit, signal detection, digital signal processing algorithms, and a regression model for accurate temperature determination.

Main Results:

  • The developed indirect measurement method achieved an accuracy of ±3 °C within an operating temperature range of 50–350 °C.
  • The measurement time was significantly reduced to 20 ms, enabling rapid feedback for temperature control.
  • A testbed system confirmed the effectiveness and reliability of the proposed indirect temperature measurement and control system.

Conclusions:

  • The proposed indirect temperature measurement method, coupled with a rapid control system, effectively addresses challenges in FDM/FFF 3D-printing quality.
  • This technology promises to enhance the mechanical properties and ensure consistent quality of 3D-printed objects.
  • The system offers a viable solution for real-time temperature management in advanced additive manufacturing processes.