Abstract: A nondestructive testing method for detecting and distinguishing internal and external defects of a wire rope includes: acquiring a magnetic flux signal and a MFL signal of a detected wire rope; preprocessing the magnetic flux signal and the MFL signal of the detected wire rope; comparing a preprocessed magnetic flux signal and a preprocessed MFL signal with a preset magnetic flux signal threshold and a preset MFL signal threshold respectively, and calculating a defect position; extracting a magnetic flux signal of a defect and an MFL signal of the defect based on the defect position; calculating a defect width of the detected wire rope based on the magnetic flux signal of the defect and the MFL signal of the defect; calculating a defect cross-sectional area loss of the detected wire rope based on the defect width; and determining whether the defect is the internal defect or the external defect.

Abstract: A nondestructive testing method for detecting and distinguishing internal and external defects of a wire rope includes: acquiring a magnetic flux signal and a MFL signal of a detected wire rope; preprocessing the magnetic flux signal and the MFL signal of the detected wire rope; comparing a preprocessed magnetic flux signal and a preprocessed MFL signal with a preset magnetic flux signal threshold and a preset MFL signal threshold respectively, and calculating a defect position; extracting a magnetic flux signal of a defect and an MFL signal of the defect based on the defect position; calculating a defect width of the detected wire rope based on the magnetic flux signal of the defect and the MFL signal of the defect; calculating a defect cross-sectional area loss of the detected wire rope based on the defect width; and determining whether the defect is the internal defect or the external defect.

Abstract: An electronic device includes a front frame, a back cover, a support stand rotatably connected to the back cover, a display panel and a circuit board. The display panel and the circuit board are fixed between the front frame and the back cover. The circuit board includes a first contact and a number of second contacts. The second contacts surround the first contact. The support includes a central shaft and a third contact. The central shaft is electrically connected to the first contact. The third contact rotates with the rotation of the central shaft to contact each of the second contacts. The circuit board includes a circuit and a processor. The electric circuit generates different signals when the first contact is connected different second contacts. The processor adjusts an orientation of display content on the display panel to rotate based on the signal.

Abstract: An electronic device includes a front frame, a back cover, a support stand rotatably connected to the back cover, a display panel and a circuit board. The display panel and the circuit board are fixed between the front frame and the back cover. The circuit board includes a first contact and a number of second contacts. The second contacts surround the first contact. The support includes a central shaft and a third contact. The central shaft is electrically connected to the first contact. The third contact rotates with the rotation of the central shaft to contact each of the second contacts. The circuit board includes a circuit and a processor. The electric circuit generates different signals when the first contact is connected different second contacts. The processor adjusts an orientation of display content on the display panel to rotate based on the signal.