Fastener Tightening Control System in an Assembly and Method for Controlling the Tightening of a Fastener in an Assembly

Abstract

The present invention relates to a system for controlling the tightening (10) of a fastener (12) in an assembly (36), said fastener (12) comprising a rod (14) and an assembly member (16), the control system (10) comprising: a first measuring device (44), the first measuring device (44) being suitable for measuring a first parameter representative of the temporal response of the rod (14) to ultrasonic excitation, a second measuring device (46) for measuring a second parameter representative of the frequency response of the rod (14) to ultrasonic excitation, and a calculator (48), the calculator (48) being suitable for determining a value of the rod tightening (14) as a function of at least the said first parameter and the second parameter.

Dependencies are inferred from the claim text.