Method for improving stability of cold rolling inductance type centering detector

Abstract

The invention discloses a method for improving the stability of a cold rolling inductance type centering detector. The method includes the steps that excitation is carried out on a transmitting coil of the inductance type centering detector through sine-wave voltages with the more-than-300KHz frequency based on the skin effect and the skin depth theory; when centering detection is carried out on strip steel less than 0.5m in thickness, the transmitting coil transmits a high frequency magnetic field to generate the skin effect on the surface of the strip steel, and the field quantity is gathered on the surface of the strip steel and cannot permeate and penetrate through the strip steel; when the thickness is changed by bouncing and sloping of the strip steel, the high frequency magnetic field cannot penetrate through the strip steel but be received by a receiving coil of the inductance type centering detector. By means of the technical scheme, the stability of the inductance type centering detector on a strip steel production line can be improved, and measuring errors and instable readout, caused by the fact that the thickness is changed by bouncing and sloping of the strip steel, of the inductance type centering detector are effectively eliminated.

Description

technical field [0001] The invention relates to the field of integrated detection of machinery, electronics and electromagnetics, in particular to a method for improving the stability of a cold-rolled inductive centering detector during the centering detection process of a cold-rolled strip steel production line. Background technique [0002] In the continuous production line of cold-rolled strip steel, the processed strip steel tends to deviate from the center line of the unit during transportation, which reduces the product quality and seriously affects the normal operation of production. Therefore, in actual production, the centering detection method is often used to control the deviation of the strip. Inductive alignment detection (also known as deviation correction measurement) is not affected by the harsh external environment and is widely used in cold-rolled strip steel production lines. [0003] Inductive alignment detection is based on the principle of electromagne...

AI Technical Summary

Problems solved by technology

The thickness and width of the strip between the transmitting coil and the receiving coil will vary due to the inclination of the strip during uncoiling and coiling (e.g. figure 1 shown), or due to strip bouncing will produce changes in the distance between the transmitting coil, receiving coil and the strip (such as figure 2 shown), these changes will cause measurement errors and unstable readings of the inductive centering detector

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