Patent ID: 7077011
Filing Date: 2006-07-18
Classification: F02K,G01G,G01L

Abstract:
1. An apparatus for measuring stress at an interface comprising a stress sensor, the stress sensor including: a sensor body having a central x-axis and a y-axis perpendicular to the central x-axis, opposing first and second portions of the sensor body being resiliently deformable with respect to one another along a direction generally parallel to the central x-axis in response to a shear component of a stress and along a direction generally parallel to the y-axis in response to a normal component of the stress; and a sensing device configured for generating sensor measurement signals representative of the stress, the sensing device comprising first and second sensor elements each extending between the opposing first and second portions of the sensor body, the first sensor element having a first longitudinal axis intersecting the central x-axis at a first oblique angle α and the second sensor element having a second longitudinal axis intersecting the central x-axis at a second oblique angle −α.