Results 21 to 30 of about 3,991,060 (277)
An Opening Profile Recognition Method for Magnetic Flux Leakage Signals of Defect [PDF]
IEEE Transactions on Instrumentation and Measurement, 2019 The defect opening profile recognition is of great concern in the magnetic flux leakage (MFL) measurement technique. The detected spatial MFL signal has three components: horizontal, vertical, and normal components. Horizontal and normal component signals are commonly used to estimate the defect profile, while the vertical component has always been ...
Songling Huang +4 more
openaire +3 more sources
Sensors, 2023 This study aimed to evaluate 2D magnetic flux leakage (MFL) signals (Bx, By) in D19-size reinforcing steel with several defect conditions. The magnetic flux leakage data were collected from the defected and new specimens using an economically designed ...
Jamal Yousaf +3 more
doaj +1 more source
Reduction of the Velocity Impact on the Magnetic Flux Leakage Signal [PDF]
Journal of Nondestructive Evaluation, 2019 The velocity effect on the magnetic flux leakage (MFL) signal was investigated in this paper. Experiments were performed for velocity of the MFL tool within the range of 0–2 m/s. The velocity was not constant during each measurement to imitate real operational conditions of the MFL tool. Two components of the leakage were measured, i.e.
Zbigniew Usarek +2 more
openaire +1 more source
Optimization design of magnetic flux circuit for mine wire rope damage detection
Gong-kuang zidonghua, 2022 The magnetic flux leakage(MFL) detection method is the most widely used method for detecting the mine wire rope damage, and there is no research on the influence of magnetic noise signal in magnetic flux circuit on the MFL detection signal of wire rope ...
TIAN Jie +4 more
doaj +1 more source
CARRIER SIGNAL INJECTION BASED SENSORLESS CONTROL OF PERMANENT MAGNET BRUSHLESS AC MACHINES [PDF]
, 2012 This thesis is focused on the carrier signal injection based sensorless control of Permanent Magnet (PM) Brushless AC (BLAC) machines. Based on the machine saliency property, carrier signal injection based sensorless techniques have been well developed ...
Gong, Liming
core +6 more sources
Enhancing Wire-Rope Damage Signals Based on a Radial Magnetic Concentrator Bridge Circuit
Sensors, 2022 Hall-effect sensors are used for the non-destructive testing of wire ropes owing to their low power consumption and high operation frequency. The high-speed operation of wire ropes causes vibration inclination at different frequencies, which makes it ...
Jie Tian +5 more
doaj +1 more source
Applied Sciences, 2022 Magnetic flux leakage (MFL) detection is a common nondestructive detection method which is usually used to detect the surface defects of steel pipes and rails.
Yinliang Jia +5 more
doaj +1 more source
Excitation device for mining steel wire rope based on magnetic flux leakage detection
Gong-kuang zidonghua, 2023 The current research does not consider the influence of wire rope swing on the excitation device in the context of engineering applications, resulting in unsatisfactory detection results.
LI Jianhui +4 more
doaj +1 more source
Frequency Dependent Model of Leakage Inductance for Magnetic Components [PDF]
, 2012 Theoretical methods for the calculation of winding losses with respect to frequency have been well documented, but the variation in leakage inductance of magnetic components due to frequency has been less well addressed. In this paper Dowell’s well-known
Wilcock, Reuben +5 more
core +1 more source
Unsaturated Magnetic Flux Leakage Detection and Identification of Scratches in Oil and Gas Pipelines
Shiyou jixie, 2022 The online detection technology for oil and gas pipelines can effectively detect metal loss defects, but it has limited ability to distinguish corrosion and mechanical damage scratches.
Zhang Xuewei +3 more
doaj