Patent ID: 6619136
Filing Date: 2003-09-16
Classification: G01L

Abstract:
A method for measuring stress in a structural element, comprising:fixing displacement measuring means onto the element in a measurement zone drilling a hole in the element in the measurement zone; introducing an actuator into the hole; applying a supply pressure to the actuator; and analyzing the displacements measured as a function of the actuator supply pressure so as to estimate a degree of stress in the element in the measurement zone, wherein the displacement measuring means comprise two arms fixed to the element at two respective anchoring points aligned parallel to a measuring direction, and at least two displacement sensors mounted on the arms on each side of the anchoring points and each measuring a relative displacement, parallel to the measuring direction, of two respective portions of the arms which portions lie facing one another, and wherein the arms have a gap therebetween, the hole being drilled through said gap at a central position with respect to the anchoring points.