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Related Concept Videos

Temperature Measurement Sites01:14

Temperature Measurement Sites

4.2K
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...
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Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

2.1K
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,...
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Operational Amplifiers01:17

Operational Amplifiers

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The operational amplifier, often referred to as an op-amp, is a multifaceted building block of a circuit. This electronic component functions like a voltage-controlled voltage source and can also be used to create a voltage- or current-controlled current source. The design of an operational amplifier enables it to execute mathematical operations when external components like resistors and capacitors are linked to its terminals. An op-amp has the capacity to sum signals, amplify a signal,...
1.9K
Assessing Body Temperature - Tympanic membrane01:14

Assessing Body Temperature - Tympanic membrane

1.3K
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...
1.3K
Thermosensation01:43

Thermosensation

29.7K
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...
29.7K
Thermometers and Temperature Scales01:22

Thermometers and Temperature Scales

6.1K
Any physical property that depends consistently and reproducibly on temperature can be used as the basis of a thermometer. For example, volume increases with temperature for most substances. This property is the basis for the common alcohol thermometer and the original mercury thermometers. Other properties used to measure temperature include electrical resistance, color, and the emission of infrared radiation.
As many physical properties depend on temperature, the variety of thermometers is...
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A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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High-sensitivity temperature sensor based on an optoelectronic oscillator.

Yanhong Zhu, Xiaofeng Jin, Hao Chi

    Applied Optics
    |August 5, 2014
    PubMed
    Summary
    This summary is machine-generated.

    A novel optoelectronic oscillator (OEO) temperature sensor demonstrates high sensitivity. This reliable sensor offers a wide dynamic range for precise temperature measurements.

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    Area of Science:

    • Optoelectronics
    • Sensor Technology
    • Physics

    Background:

    • Accurate temperature sensing is crucial across various scientific and industrial applications.
    • Traditional sensors can face limitations in sensitivity, dynamic range, or reliability.
    • Optoelectronic oscillators (OEOs) offer potential for high-performance sensing due to their frequency-based output.

    Purpose of the Study:

    • To propose and experimentally demonstrate a high-sensitivity temperature sensor utilizing an optoelectronic oscillator (OEO).
    • To investigate the relationship between temperature variation and OEO oscillation frequency shift.
    • To enhance sensor performance through an injection-locking method for initial frequency stabilization.

    Main Methods:

    • Development of a temperature sensor architecture based on an optoelectronic oscillator (OEO).
    • Implementation of an injection-locking technique to establish a stable initial oscillation frequency.
    • Experimental characterization of the sensor's frequency response to temperature changes within a specific range.

    Main Results:

    • The OEO temperature sensor exhibits an inverse relationship between oscillation frequency shift and temperature variation.
    • High temperature sensitivity of 43.91 kHz/°C was achieved.
    • The sensor demonstrated high accuracy of ±0.12°C over a temperature range of 20°C to 240°C.

    Conclusions:

    • The proposed OEO-based sensor offers a highly sensitive and reliable method for temperature measurement.
    • The injection-locking technique effectively addresses initial frequency uncertainty, improving sensor reliability.
    • The system's wide dynamic range and high sensitivity make it suitable for demanding temperature monitoring applications.