Magnetic particle testing (MT) has been widely used in nondestructive (NDT) of ferromagnetic materials. MT can be divided into wet method and dry method. The is highly sensitive for microcracks easy to operate. But the problem that magnetic suspension liquid utilized pollutes both test objects environment. Dry particles are recyclable environmentally friendly. irrelevant magnet must manually removed reveal indication (MPI). This operation limits detection efficiency sensitivity To increase...

In electromagnetic ultrasonic testing, it is difficult to recognize small-size bottom cracks by time of flight (ToF), and the lift-off fluctuation probe affects accuracy consistency inspection results. order overcome difficulty, a novel EMAT (electromagnetic acoustic transducer)-PEC (pulse eddy current) composite sensor designed. We use amplitude echo recorded identify tiny crack as well PEC signals picked up integrated symmetric coils measure average in real time. Firstly, effects on are...

Having been predominantly observed in rigid metal and alloys since 1865, the magnetoelastic effect was recently experimentally discovered a soft matter system used as new working mechanism for energy health care applications. Here, theoretical framework is presented proven to be universally accurate robust interpreting giant across systems subjected various deformation modes, micromagnet concentrations, magnetization profiles, geometric structures. The theory uncovers substantial, unique...

Abstract The development of soft mechanocaloric materials is becoming increasingly important due to the growing demand for energy‐efficient and environmentally friendly thermoregulation solutions. Here effects in materials, which can convert mechanical energy into heat energy, discussed, their applications sensing, therapeutics, explored. It begins by introducing principles effect recent advances its study within materials’ systems. Then personalized healthcare sustainable Finally,...

During electromagnetic detection, the disturbing magnetic field generated by defect is far weaker than background transmitter. Thus, can cause sensor saturation and bring interference signals. Meanwhile, in actual detection process, deformation of material vibration probe will about fluctuation liftoff, which seriously interferes with signal. In order to eliminate these two interferences, firstly, this paper proposes a magnetizer using double-layer parallel cables bridge circuit, eliminates...

During electromagnetic ultrasonic testing, it is difficult to recognize small-size bottom cracks by time of flight (ToF), and the lift-off fluctuation probe affects accuracy consistency inspection results. In order overcome difficulty, a novel composite sensor an acoustic transducer (EMAT) pulse eddy current (PEC) designed. We use amplitude echo recorded EMAT identify tiny crack as well PEC signals picked up integrated symmetric coils measure average in real time. Firstly, effects on are...

Abstract This paper proposes a novel composite measurement method for defect detection, which integrates PMFP (permanent magnetic field perturbation) testing and lift-off measurement. The is used to detect defects, while the permanent magnet utilized construct bridge In testing, variation of can significantly affect signal. To mitigate this effect, proposed compensates signal using measured information, effectively reduces impact during testing. Therefore, constructs dipole model based on...

Probe is core part of electromagnetic testing. It mainly composed transmitters and receivers. The transmitter which generates uniform excitation field, such as rectangular coil, bobbin etc., working with array sensors receivers, are widely used due to its high efficiency. main contribution these the parallel cables (PC) close workpiece. However, probe inevitably disturbed by background magnetic field change lift-offs. This paper proposes a novel MFC bridge double-layer cables, sensing unit...

In the field of industrial testing, lift-off fluctuations probe are inevitable, leading to unstable signals and inconsistent detection results, especially in electromagnetic acoustic transducer (EMAT). Besides, EMAT has a low energy utilization, since induced pulsed eddy current (PEC) is not fully utilized during transduction process. To address these issues, this paper proposes novel composite method which able measure based on PEC compensate for effect using designed comprehensive EMAT-PEC...

Magnetic particle testing (MT) has the advantages of high sensitivity and adaptability. However, during formation magnetic indication (MPI) corresponding to surface opening defects, defects are filled with particles, resulting in weakening leakage field (LMF), a phenomenon that been ignored existing studies. In order enhance visual feature MPI, this paper proposes an isolation strip-based method (ISMT), which can avoid attenuation LMF. Meanwhile, ISMT isolate conditions specimen...

Aim at the detection and evaluation of oil gas pipeline corrosion, an array magnetic field displacement probe sensing method is proposed. The light, efficient high geometry adaptability. magnetizer composed double-layer PCs proposed to eliminate background noise in main flux direction, so that high-sensitivity units can work without saturation. It not only ensures sensitivity probe, but also obtains a large measuring range. experimental results show when measures change range 0.5-6.5mm,...

In the field of non-destructive testing (NDT), detection surface cracks using permanent magnetic perturbation (PMFP) has emerged as a novel approach. It is particularly well-suited for detecting ferromagnetic materials due to its capability identify open cracks, facilitated by compact and straightforward probe structure. However, existing rigid PMFP probes pose challenges in terms shape-conforming, resulting large lift-off fluctuations during sweeping, are prone wear tear. Furthermore, their...