关键词: 逆磁致伸缩;应力;钢板;无损检测

Abstract: By improvement of the traditional four-pole sensor magnetic survey, a confirmatory experiment system is designed for steel stress line detection principle, and a excitation module and fast signal processing system of dynamic online detection based on the principle of inverse magnetostriction are developed in this paper. A test system of new methods for detecting strip shape is constructed in the laboratory. By making a large number of experimental investigation, the relationship between the flux with the principal stress is found, and the sensitive correlation of the two be verified. The influence of measurement results by sensor parameters is discussed in detail. The feasibility of the online magnetic detection method of internal stresses in strip is verified through the experiment, which would develop into a new method for ferromagnetic material internal stresses detection.

Key words: inverse magnetostriction;stress;steel plate;nondestructive testing