Integrated magneto-optical imaging probe and parameter self-adjusting method thereof

A parameter self-adjusting method of an integrated magneto-optical imaging probe, which comprises a linearly polarized light emitting unit, a linearly polarized light modulation unit, a linearly polarized light imaging unit, and a clamping mechanism;

• the clamping mechanism comprising an inner shell and an outer shell;
• wherein a linearly polarized light path is formed between the inner shell and the outer shell;
• the linearly polarized light emitting unit comprising a light-emitting diode (LED) light source, a light guide plate, and a polarizer;
• wherein the LED light source is fixedly installed on a side wall of the inner shell;
• the light guide plate is fixedly installed inside the inner shell, and is configured to modulate light output by the LED light source into parallel light in a horizontal direction;
• and the polarizer is fixedly installed inside the inner shell and is arranged in a direction perpendicular to the parallel light, and is configured to modulate the parallel light into linearly polarize light;
• the linearly polarized light modulation unit comprising a magneto-optical sensing module, a beam splitter, a silicon steel yoke, and a neodymium magnet;
• wherein the magneto-optical sensing module is fixedly installed inside the inner shell directly below the linearly polarized light path;
• the beam splitter is fixedly installed inside the inner shell and is configured to reflect the linearly polarized light modulated by the polarizer to a position of the magneto-optical sensing module;
• and the neodymium magnet and the silicon steel yoke are sequentially arranged and installed on a periphery of the linearly polarized light path to form a closed magnetic field loop;
• and
• the linearly polarized light imaging unit comprising a camera, an analyzer, a camera driving board, and a Lemo connector;
• wherein the analyzer is fixedly installed on a top of the outer shell directly above the linearly polarized light path, and is configured to receive the linearly polarized light modulated by a leakage magnetic field;
• the camera, the camera driving board, and the Lemo connector are sequentially connected with the analyzer to convert an optical signal captured by the analyzer into an electrical signal and transmit the electrical signal to an external display device;
• the method comprising:
• step 1, obtaining a maximum leakage magnetic field intensity at a defect of a workpiece to be tested, which comprises:
• placing the integrated magneto-optical imaging probe directly above the defect of the workpiece to be tested to excite the leakage magnetic field;
• and
• using a Tesla meter to measure the maximum leakage magnetic field intensity B at the defect of the workpiece to be tested;
• step 2, constructing a three-dimensional simulation model of the integrated magneto-optical imaging probe;
• step 3, setting an optical physical field for a geometric structure of each part of the three-dimensional simulation model constructed in step 2;
• step 4, performing differential meshing on the three-dimensional simulation model processed in step 3;
• step 5, setting scanning parameters for the three-dimensional simulation model processed in step 4, and calculating a value of each variable in the three-dimensional simulation model;
• and drawing a simulated magneto-optical image;
• and
• step 6, analyzing the simulated magneto-optical image obtained in step 5, and determining an optimal value of each variable in the three-dimensional simulation model.