Related Experiment Video
Updated: Jan 21, 2026
09:48
Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
Published on: November 7, 2016
12.4K
Localization of Transient Events Threatening Pipeline Integrity by Fiber-Optic Distributed Acoustic Sensing.
Maria-Teresa Hussels1, Sebastian Chruscicki2, Detlef Arndt2
1Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany. maria-teresa.hussels@bam.de.
Sensors (Basel, Switzerland)
|August 1, 2019
Summary
Fiber-optic distributed acoustic sensing (DAS) effectively tracks acoustic waves in pipes, enabling precise localization of impacts and pressure waves. This technology enhances infrastructure monitoring and aids in studying dynamic events like gas explosions.
Area of Science:
- Engineering
- Materials Science
- Physics
Background:
- Pipe integrity is crucial for industrial safety, availability, and environmental compliance.
- Monitoring systems must detect transient events like impacts and pressure waves for early threat detection.
Purpose of the Study:
- To demonstrate the capability of fiber-optic distributed acoustic sensing (DAS) for tracking acoustic waves in pipe walls.
- To localize transient events and study explosion dynamics in pipes using DAS.
Main Methods:
- Utilizing fiber-optic distributed acoustic sensing (DAS) with specific sensor geometries to monitor acoustic wave propagation.
- Conducting experiments with short impacts and gas explosions in pipes.
- Validating results with piezoelectric pressure transducers.
Main Results:
- DAS successfully tracked acoustic waves on a fast time-scale, allowing high-fidelity localization of impacts.
- Identified acoustic modes and their velocities agreed with theoretical predictions.
- Observed and verified pressure waves from gas explosions, demonstrating DAS's ability to record accelerated motions.
Conclusions:
- DAS is a powerful tool for real-time infrastructure monitoring, detecting and localizing pipe threats.
- The technology can provide detailed insights into dynamic events such as gas explosions and deflagration-to-detonation transitions (DDT).
Related Concept Videos
01:28Integration of Synaptic Events
3.5K
Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability to...
3.5K
01:24Local Anesthetics: Differential Sensitivity of Nerve Fibers
1.4K
Local anesthetics (LAs) block the sodium channels of nerve trunks, sensory nerve endings, and neuromuscular junctions. Although LAs can block all kinds of nerves, the sensitivity of nerve fibers differs according to nerve types and structures. LAs are known to block myelinated fibers faster than unmyelinated ones. Also, they block pain or sensory neurons at low concentrations without affecting the motor neurons involved in muscle contractions. This helps relieve labor pain without affecting the...
1.4K
02:57The Sense of Self: Reflected Self-Appraisal and Social Comparison
55.5K
According to Charles Cooley, we base our image on what we think other people see (Cooley 1902). We imagine how we must appear to others, then react to this speculation. We don certain clothes, prepare our hair in a particular manner, wear makeup, use cologne, and the like—all with the notion that our presentation of ourselves is going to affect how others perceive us. We expect a certain reaction, and, if lucky, we get the one we desire and feel good about it. But more than that, Cooley...
55.5K
01:48Classification of Skeletal Muscle Fibers
59.4K
Skeletal muscles continuously produce ATP to provide the energy that enables muscle contractions. Skeletal muscle fibers can be categorized into three types based on differences in their contraction speed and how they produce ATP, as well as physical differences related to these factors. Most human muscles contain all three muscle fiber types, albeit in varying proportions.
Slow-Twitch Muscle Fibers
Slow oxidative, muscle fibers appear red due to large numbers of capillaries and high levels of...
Slow-Twitch Muscle Fibers
Slow oxidative, muscle fibers appear red due to large numbers of capillaries and high levels of...
59.4K
01:22Series R—L Circuit Transients
386
In a series resistor-inductor (R-L) circuit, closing the switch at the start of the time period simulates a three-phase short circuit, a fault condition where all three phases of an unloaded synchronous machine are short-circuited. When there is no fault impedance and no initial current, the initial voltage is determined by the phase angle of the source voltage.
Using Kirchhoff's Voltage Law (KVL) to analyze this circuit helps determine the total asymmetrical fault current, which consists...
Using Kirchhoff's Voltage Law (KVL) to analyze this circuit helps determine the total asymmetrical fault current, which consists...
386
02:32Variation: Normal Distribution, Range, and Standard Deviation
27.0K
In the field of psychology, there are several ways to organize measurements of a trait, feature, or characteristic (i.e., variables). Qualitative data, such as ethnicity, can be tabulated into a frequency count to provide information about the proportion, as well as the variety of groups in a sample or population. On the other hand, researchers can perform a wider set of calculations on quantitative data. The mean, mode, and median, for instance, are central tendency measures to identify a...
27.0K