Coupling Interference between Eddy Current Sensors for the Radial Displacement Measurement of a Cylindrical Target

Zhang, Weifeng; Bu, Jing Long; Li, Dongjie; Zhang, Ke; Zhou, Ming

doi:10.3390/s22124375

Cited by 5 publications

(4 citation statements)

References 34 publications

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“…The Eddy current is established based on the principle of electromagnetism as the basic for carrying out experiments [34]. An encircling test coil was utilized to monitor the micro surface defects of the steel wire during the wet-drawing process.…”

Section: Eddy Current Principlementioning

confidence: 99%

Detection, Verification and Analysis of Micro Surface Defects in Steel Filament Using Eddy Current Principles, Scanning Electron Microscopy and Energy-Dispersive Spectroscopy

Tran,

Shirinzadeh,

Ehrampoosh

et al. 2023

Sensors

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In the current industrial revolution, advanced technologies and methods can be effectively utilized for the detection and verification of defects in high-speed steel filament production. This paper introduces an innovative methodology for the precise detection and verification of micro surface defects found in steel filaments through the application of the Eddy current principle. Permanent magnets are employed to generate a magnetic field with a high frequency surrounding a coil of sensors positioned at the filament’s output end. The sensor’s capacity to detect defects is validated through a meticulous rewinding process, followed by a thorough analysis involving scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). Artificial defects were intentionally introduced into a sample, and their amplitudes were monitored to establish a threshold value. The amplitude signal of these created defect was identified at approximately 10% FSH, which corresponds to a crack depth of about 20 µm. In the experimental production of 182 samples covering 38 km, the defect ratio was notably high, standing at 26.37%. These defects appeared randomly along the length of the samples. The verification results underscore the exceptional precision achieved in the detection of micro surface defects within steel filaments. These defects were primarily characterized by longitudinal scratches and inclusions containing physical tungsten carbide.

show abstract

Section: Eddy Current Principlementioning

confidence: 99%

Detection, Verification and Analysis of Micro Surface Defects in Steel Filament Using Eddy Current Principles, Scanning Electron Microscopy and Energy-Dispersive Spectroscopy

Tran,

Shirinzadeh,

Ehrampoosh

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

“…Eddy current is established based on the principle of electromagnetism as the basic for carrying out experiments [34]. An Encircling test coil was utilized to monitor the micro surface defects of steel wire during wet drawing process.…”

Section: Eddy Current Princilementioning

confidence: 99%

Detection, Verification and Analysis of Micro Surface Defects in steel Filament Using Eddy Current Principles, Scanning Electron Microscopy and Energy-dispersive Spectroscopy

Tran,

Shirinzadeh,

Ehrampoosh

et al. 2023

Preprint

View full text Add to dashboard Cite

In the current industrial revolution, advanced technologies and methods can be effectively utilized for the detection and verification of defects in high-speed steel filament production. This paper introduces an innovative methodology for the precise detection and verification of micro surface defects found in steel filaments through the application of the Eddy current principle. Permanent magnets are employed to generates a magnetic field with high frequency surrounding a coil of sensor positioned at the filament's output end. The sensor's capacity to detect defects is validated through a meticulous rewinding process, followed by a thorough analysis involving scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). Artificial defects were intentionally introduced into a sample, and their amplitudes were monitored to establish a threshold value. The amplitude signal of these created defect was identified at approximately 10% FSH, which corresponds to a crack depth of about 20 µm. In the experimental production of 182 samples covering 38 km, the defect ratio was notably high, standing at 26.37%. These defects appeared randomly along the length of the samples. The verification results underscore the exceptional precision achieved in the detection of micro surface defects within steel filaments. These defects were primarily characterized by longitudinal scratches and inclusions containing physical tungsten carbide.

show abstract

“…Eddy current-based sensors are common in the industry and find application in different areas such as process monitoring, material testing and production control [ 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Development of an Inductive Rain Gauge

Clemens

Jobst

Radschun

et al. 2022

Sensors

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Measuring weather data in an urban environment is an important task on the journey towards smart cities. Heavy rain can cause flooding in cities and prevent emergency services from reaching their destination because roads or underpasses are blocked. In order to provide a high-resolution site-specific overview in urban areas during heavy rainfall, a dense measurement network is necessary. To achieve this, a smart low-cost rain gauge is needed. In this paper, the current status of the development of an inductive rain gauge is presented. The sensor is based on the eddy current principle and evaluates the frequency of an electrical resonant circuit. For this purpose, a coil is placed under a metal plate. When raindrops hit the plate, it starts to oscillate, which changes the distance to the coil accordingly and causes changes in the frequency of the resonant circuit. Since the sensor is cost-effective, operates self-sufficiently in terms of energy and transmits data wirelessly via LoRaWAN, it can be used flexibly. This enables dense, area-wide coverage over the urban area of interest. The first experimental investigations show a correlation between the size of the rain droplets and the frequency change. Small droplets cause a shift of about 8 kHz and larger droplets of up to 40 kHz. The results prove that raindrops can be detected and categorized using this measurement principle. These data will be used as a basis for future work on calculating precipitation.

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Coupling Interference between Eddy Current Sensors for the Radial Displacement Measurement of a Cylindrical Target

Cited by 5 publications

References 34 publications

Detection, Verification and Analysis of Micro Surface Defects in Steel Filament Using Eddy Current Principles, Scanning Electron Microscopy and Energy-Dispersive Spectroscopy

Detection, Verification and Analysis of Micro Surface Defects in Steel Filament Using Eddy Current Principles, Scanning Electron Microscopy and Energy-Dispersive Spectroscopy

Detection, Verification and Analysis of Micro Surface Defects in steel Filament Using Eddy Current Principles, Scanning Electron Microscopy and Energy-dispersive Spectroscopy

Development of an Inductive Rain Gauge

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