Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Motional Emf01:22

Motional Emf

3.3K
Magnetic flux depends on three factors: the strength of the magnetic field, the area through which the field lines pass, and the field's orientation with respect to the surface area. If any of these quantities vary, a corresponding variation in magnetic flux occurs. If the area through which the magnetic field lines are passing changes, then the magnetic flux also changes. This change in the area can be of two types: the flux through the rectangular loop increases as it moves into the...
3.3K
Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

2.8K
Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
2.8K
Magnetic Field Due To A Thin Straight Wire01:28

Magnetic Field Due To A Thin Straight Wire

5.0K
Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
5.0K
Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

4.9K
Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
4.9K
Magnetic Damping01:17

Magnetic Damping

538
Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
538
Difference from Background: Limit of Detection01:05

Difference from Background: Limit of Detection

6.9K
The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
The LOD indicates the presence or absence...
6.9K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Research on Orchard Navigation Line Recognition Method Based on U-Net.

Sensors (Basel, Switzerland)·2025
Same author

Intelligent Vehicle Target Detection Algorithm Based on Multiscale Features.

Sensors (Basel, Switzerland)·2025
Same author

Research on Tire Surface Damage Detection Method Based on Image Processing.

Sensors (Basel, Switzerland)·2024
Same author

Global Dynamic Path Planning of AGV Based on Fusion of Improved A* Algorithm and Dynamic Window Method.

Sensors (Basel, Switzerland)·2024
Same author

Traffic Sign Recognition Based on the YOLOv3 Algorithm.

Sensors (Basel, Switzerland)·2022
Same author

Prognostic Impact of Cirrhosis in Patients with Intrahepatic Cholangiocarcinoma following Hepatic Resection.

Canadian journal of gastroenterology & hepatology·2017

Related Experiment Video

Updated: Sep 3, 2025

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.7K

Research on Forward Problem of Rail Detection Based on Magnetoacoustic Coupling.

Xin Huang1, Aijuan Li2, Zhen Huang3

  • 1School of Electrical Engineering, Shan Dong Jiaotong University, Jinan 250357, China.

Sensors (Basel, Switzerland)
|July 28, 2022
PubMed
Summary

This study introduces a novel rail microcrack detection method using the magnetoacoustic coupling effect. This technique shows promise for identifying surface cracks in high-speed rails, enhancing safety and maintenance.

Keywords:
magnetic acoustic imagingmagneto-acoustic signalpulse currentrail crack

More Related Videos

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
08:23

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

6.4K
Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors
06:17

Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors

Published on: January 16, 2020

5.8K

Related Experiment Videos

Last Updated: Sep 3, 2025

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.7K
A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
08:23

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

6.4K
Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors
06:17

Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors

Published on: January 16, 2020

5.8K

Area of Science:

  • Materials Science
  • Non-destructive Testing
  • Physics

Background:

  • Rail defects, particularly microcracks, pose significant safety risks to high-speed rail infrastructure.
  • Effective detection methods are crucial for ensuring operational integrity and preventing catastrophic failures.
  • Existing methods may have limitations in detecting subtle surface defects.

Purpose of the Study:

  • To propose and validate a rail microcrack detection method leveraging the magnetoacoustic coupling effect.
  • To theoretically analyze the underlying principles and simulate the physical phenomena involved.
  • To experimentally verify the feasibility of detecting rail microcracks using this approach.

Main Methods:

  • Theoretical analysis of the magnetoacoustic coupling effect in rail materials.
  • Simulation of current density, Lorentz force, particle motion, and sound field distribution.
  • Experimental setup with a steel ring model to collect magnetic and acoustic signals.
  • Analysis of signal characteristics in relation to material conductivity changes.

Main Results:

  • Simulation successfully predicted current density, Lorentz force, particle motion, and sound field distributions.
  • Experimental collection of magnetic and acoustic signals correlated with the steel ring's geometry.
  • Demonstrated that changes in rail microstructure affect conductivity and sound pressure characteristics.
  • The magnetoacoustic coupling effect was shown to be sensitive to surface microcracks.

Conclusions:

  • The proposed magnetoacoustic coupling method is feasible for detecting surface microcracks in high-speed rails.
  • The technique offers a promising new avenue for rail flaw detection with significant development potential.
  • This method could enhance the safety and reliability of rail transport through improved defect identification.