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Related Concept Videos

Temperature Measurement Sites01:14

Temperature Measurement Sites

1.9K
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...
1.9K
Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

1.1K
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,...
1.1K
Assessing Body Temperature - Temporal Artery01:19

Assessing Body Temperature - Temporal Artery

622
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...
622
Assessing Body Temperature - Tympanic membrane01:14

Assessing Body Temperature - Tympanic membrane

638
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...
638
Distance Corrections01:15

Distance Corrections

60
To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
60
Assessing Body Temperature - Axilla01:14

Assessing Body Temperature - Axilla

629
Procedural Guide for Assessing Axillary Body Temperature using a Digital Thermometer:
Step 1: Perform hand hygiene and put on clean gloves to maintain infection control and prevent cross-contamination.
Step 2: Prepare the patient by explaining the procedure to ensure understanding and cooperation. Ensure privacy, expose the axilla, and inform the patient that minimal movement is crucial for an accurate reading.
Step 3: Adjust the patient’s clothing to expose only the axilla. It minimizes...
629

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Fabrication and Testing of Photonic Thermometers
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Fabrication and Testing of Photonic Thermometers

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Improved Acoustic Thermometry for Long-Distance Temperature Measurements.

Marco Pisani1, Milena Astrua1, Massimo Zucco1

  • 1Istituto Nazionale di Ricerca Metrologica, INRIM, 10135 Torino, Italy.

Sensors (Basel, Switzerland)
|February 11, 2023
PubMed
Summary
This summary is machine-generated.

An acoustic thermometer measures air temperature using sound speed, crucial for accurate long-distance measurements in industries like aerospace. This method enhances precision for laser interferometers and addresses temperature gradients in tracking systems.

Keywords:
aerospace manufacturingair temperature gradientinterferometrylaser trackerslong-distance measurementsspeed of soundthermometry

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Area of Science:

  • Metrology and Instrumentation
  • Acoustics and Thermodynamics
  • Industrial Manufacturing

Background:

  • Accurate long-distance measurements (tens of meters) are critical in large-scale manufacturing, such as aerospace.
  • Laser interferometers achieve high relative accuracy (10-7) but depend on precise air temperature knowledge.
  • Air temperature significantly impacts the speed of light, a key factor in laser interferometer accuracy.

Purpose of the Study:

  • To develop and validate an acoustic thermometer for measuring air temperature along laser interferometer paths.
  • To achieve high accuracy (0.1 °C) in temperature measurements over distances up to 11 meters.
  • To assess the method's potential for measuring vertical temperature gradients affecting triangulation measurements.

Main Methods:

  • Realization of an acoustic thermometer at INRIM based on measuring the speed of sound in air.
  • Experimental setup description and performance evaluation.
  • Comparison of acoustic thermometer readings with calibrated reference platinum resistance thermometers.

Main Results:

  • The acoustic thermometer measures air temperature with an accuracy of 0.1 °C.
  • Demonstrated capability for temperature measurement up to 11 meters.
  • Validated performance against reference platinum resistance thermometers.

Conclusions:

  • The acoustic thermometer provides accurate air temperature measurements essential for high-precision long-distance metrology.
  • The method effectively addresses temperature-related errors in laser-based measurement systems.
  • Potential application in mitigating errors caused by vertical temperature gradients in triangulation measurements.