Patent Number: 6,166,537

Title: Method to measure the variations in section of a rolled bar while minimizing the influence of temperature

Abstract: Method to measure the variations in section of a hot rolled bar (12) as it is fed, the method including the generation of a variable frequency magnetic field by at least a generator device (14) defining an inner space (214) for the transit of the bar (12), the variations in section of the bar (12) in transit being measured by a receiver device (15) suitable to monitor the perturbations induced on the magnetic field by the variations in the area of section of the bar (12) in transit. The receiver device (15) is arranged coaxial and inside the generator device (14) and defines inside the same a surface for the transit of the bar. The (12) has a transverse section of (A.sub.S "), and the value ("f.sub.0 ") of the frequency of the magnetic field generated by the generator device (14) is suitable to minimize the influence of the real temperature of the bar (12) on the measurement.

Inventors: Della Vedova; Ferruccio (Zugliano, IT)

Assignee: Centro Automation SpA

International Classification: B21B 38/00 (20060101); B21B 38/04 (20060101); G01B 7/12 (20060101); G01R 033/12 (); G01B 007/00 (); G01N 027/72 ()

Expiration Date: 12/26/2017