One of the goals of the steel-based industrial applications is the detection of the mechanical stress state of steel structures. The mechanical tensile stress modifies the magnetic anisotropy in ferromagnetic materials. This fact can be used to detect changes in the stress state of the material using magnetic inspection methods. The Magnetic Barkhausen Noise is one of the most sensitive magnetic non-destructive methods to the presence of applied stress. The present work presents a method for the real-time detection of dynamic changes of the stress field of samples under variable applied tension. The method involves the detection of biaxial applied stress distributions.