Title: Method of energizing a magnetic stress transducer to reduce the creep of the measuring signal

Abstract: In measuring mechanical stresses in an object of hardened and tempered steel with a magnetic transducer of the type which comprises a magnetizing circuit for generating a magnetic field in the object and a measuring circuit for sensing the changes in the magnetic field which occur in the object when it is subjected to mechanical forces, in order to reduce the creep of the measuring signal which occurs in the case of continuous feeding, the magnetizing circuit is energize with energy in the form of AC pulses of a pulse length between 20 and 120 milliseconds.

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Inventors: Bielsten, Nils Ove (Vasteras, SW)
Dahle, Orvar (Vasteras, SW)
Grek, Ronald (Vasteras, SW)
Hoffman, Bertil (Kolback, SW)
Siby, Sture (Vasteras, SW)
Widehn, Ake (Vasteras, SW)

Application Number: 573797
Filing Date: 1975-05-01
Publication_date: 1976-09-14
Assignee: Allmanna Svenska Elektriska Aktiebolaget (Vasteras, SW)
Primary Class(es): 324/262 73/779, 73/862.333, 73/DIG2, 324/209, 324/233
Other Classes:
US Patent Ref:

2912642	Nov, 1959	Dahle	324/34.
3424007	Jan, 1969	Pasnak et al.	73/DIG.
3639832	Feb, 1972	Goebbels	324/34.

Other Refs: 1,297,890

Jun, 1969	DT

Primary Examiner: Corcoran, Robert J.
Assistant Examiner:
Attorney: