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Working principle of ERW pipe high frequency electrical resistance weld eddy current testing machine
Eddy current detection is the process of approaching a conductor to a coil (referred to as a probe) with alternating current, and establishing an alternating magnetic field through the coil. This alternating magnetic field passes through the conductor and undergoes electromagnetic induction, creating eddy currents within the conductor. The eddy currents in conductors also generate their own magnetic field, and the effect of the eddy current magnetic field can change the strength of the original magnetic field, leading to changes in coil voltage and impedance. Therefore, when defects appear on the surface or near the surface of the conductor or when the measured metal material changes, it will affect the intensity and distribution of eddy currents. The changes in eddy currents also cause changes in the voltage and impedance of the detection coil. Based on this change, the existence of defects inside the conductor and whether the performance of the metal material has changed can be indirectly known.
Eddy current weld testing is the use of eddy current technology to test the welded pipe, this type of testing is based on the premise of lossless. At the same time, we need to be clear that the welded pipe is, in general, the steel pipe that we usually say, which is a welded steel pipe.
Eddy current weld testing is a non-destructive testing technique for detecting component defects by using the principle that the eddy current induced by the AC electromagnetic coil on the surface of the metal member encounters a defect. The oscillating current is generated in the conductive member by the excitation coil by the principle of electromagnetic induction, and the amount of change in the eddy current is measured by the detecting coil, thereby obtaining information on the component defect.
Eddy current weld testing is a non-destructive testing technique in which an alternating current electromagnetic coil induces eddy currents on the surface of a metal member. This eddy current ndt equipment is suitable for the detection of defects in conductive materials, including ferromagnetic and non-ferromagnetic metal materials.
BKNET-01\02 NDT weld testing equipment is used for on-line and off-line inspection of welded pipes. It has high sensitively to axial defects such as unwelded welding, dark spots and open cracks. The eddy current testing of welds can effectively detects slow and long-term injuries caused by welder failure during the production process.
BKNET-01CH Welded Pipe Eddy Current Flaw Detector performance
Detection channel | 1~2 channel |
Detection speed | 0.5~100m/min |
Frequency range | 100Hz~3.2MHz |
Gain | 23~82.0dB,1 step continuously adjustable |
Phase rotation | 0~359°,1 step continuously adjustable |
High pass | 0Hz~3000Hz |
Low pass | 2Hz~4000Hz |
Sector probe to test tube weld seam
BKNET-01CH Welded Pipe Eddy Current Flaw Detector Features:
High precision end and end-to-tail signal removal
High precision real-time, delayed alarm output
This eddy current testing machine offers fast digital/analog electronic balance
Memory track delay blanking function
Non-equal amplitude phase/amplitude alarm domain
Remote automatic help system
Synchronous alarm output for internal and external clock control
Wooden case packing
