Abstract
magnetic flux intensity of the rectangular magnet is the function of its location and orientation. With the measured magnetic flux intensities at two points around the rectangular magnet by 3-axis magnetic sensors, a non-linear equation group is established, and the location and orientation of the rectangular magnet can be determined by seeking the solution of the equation group by using general Levenberg-Marquardt (L-M) algorithm. However, the time occupied by general L-M algorithm is too long to realize real-time tracking for the rectangular magnet. We propose an improved method which computes Jacobin Matrix in L-M algorithm in parallel. Making use of the Open Multi-Processing (OpenMP) model, the parallel operation is implemented on the dual-core personal computer. As a result, the real-time tracking for the rectangular magnet is realized, and the tracking curve is smooth.