Cold-Rolled Strip Steel Stress Detection Technology Based on a Magnetoresistance Sensor and the Magnetoelastic Effect

Abstract

Driven by the demands for contactless stress detection, technologies are being used for shape control when producing cold-rolled strips. This paper presents a novel contactless stress detection technology based on a magnetoresistance sensor and the magnetoelastic effect, enabling the detection of internal stress in manufactured cold-rolled strips. An experimental device was designed and produced. Characteristics of this detection technology were investigated through experiments assisted by theoretical analysis. Theoretically, a linear correlation exists between the internal stress of strip steel and the voltage output of a magneto-resistive sensor. Therefore, for this stress detection system, the sensitivity of the stress detection was adjusted by adjusting the supply voltage of the magnetoresistance sensor, detection distance, and other relevant parameters. The stress detection experimental results showed that this detection system has good repeatability and linearity. The detection error was controlled within 1.5%. Moreover, the intrinsic factors of the detected strip steel, including thickness, carbon percentage, and crystal orientation, also affected the sensitivity of the detection system. The detection technology proposed in this research enables online contactless detection and meets the requirements for cold-rolled steel strips.

Tensductor—Amorphous Alloy Based Magnetoelastic Tensile Force Sensor

“…Therefore, there is no voltage signal induced in the sensing coil. When the force is applied (Figure 1), stress-induced anisotropy of magnetic permeability [5,6] redirects some flux lines through the sensing coil [7]—the system is no longer symmetrical. Therefore, there is voltage signal induced in the sensing windings, which is a convoluted function of applied stress in the material, sensor geometry and magnetoelastic properties of the given material.…”

Quick Recognition and Elimination of an Additional Signal Caused by Deflection of an Integral Roller Flatness Meter

“…Dinh Cuong Tran et al 11) analysed the influence of surface imperfections and global tension on the wrinkling characteristics. Guan, Ben et al 12) presents a novel contactless stress detection technology based on a magnetoresistance sensor and the magnetoelastic effect, enabling the detection of internal stress in manufactured cold-rolled strips. Weisz-Patrault, Daniel 13) presented a semi-analytical inverse Cauchy problem for a finite cylinder with a cylindrical hole under the surface called the detecting roll to evaluate the residual stress profile of the strip.…”

Overview of Applications of the Sensor Technologies for Construction Machinery

“…Linear motion sensors are often used to measure the stroke of the cylinders (called stroke transducer) to drive the manipulator of a hydraulic excavator [44], as shown in figure 6. The Widman effect, a magnetostrictive effect used in the measurements carried out by displacement sensors, describes the mechanical deformation of a long, thin ferromagnetic bar in a longitudinal external magnetic field [45,46]. As the current flows through the rod, a concentric magnetic field is created.…”