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1. (WO1997011343) METHOD FOR DETERMINING THE AXIAL LOAD ON AN ELONGATED MEMBER

Pub. No.:    WO/1997/011343    International Application No.:    PCT/SE1996/001173
Publication Date: Mar 27, 1997 International Filing Date: Sep 23, 1996
IPC: G01L 1/25
G01L 5/24
G01N 29/07
G01N 29/22
G01N 29/32
Applicants: ATLAS COPCO CONTROLS AB
ANDERSSON, Tobias, Axel
Inventors: ANDERSSON, Tobias, Axel
Title: METHOD FOR DETERMINING THE AXIAL LOAD ON AN ELONGATED MEMBER
Abstract:
A method for determining the axial load on an elongate member by measuring the differences in time of flight for transversely and longitudinally ultrasonic waves introduced in the elongate member under a zero-load condition and at a current temperature and the time of flight for both of these types of waves introduced into the elongate member under the actual load condition, and calculating from these differences in the time of flight the actual load on the elongate member taking into account the influence of any occurring difference in temperature of the elongate member between the zero-load condition time of flight measurement and the actual load condition time of flight measurement.