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1. (WO1991003705) IMPROVEMENTS IN OR RELATING TO A METHOD AND APPARATUS FOR MEASURING SHEAR FORCE

Pub. No.:    WO/1991/003705    International Application No.:    PCT/GB1990/001353
Publication Date: Mar 21, 1991 International Filing Date: Sep 3, 1990
IPC: A61B 5/103
G01B 11/16
G01L 1/24
Applicants: BRITISH TECHNOLOGY GROUP PLC
HEWIT, James, Robert
Inventors: HEWIT, James, Robert
Title: IMPROVEMENTS IN OR RELATING TO A METHOD AND APPARATUS FOR MEASURING SHEAR FORCE
Abstract:
Method and apparatus for measuring the shear force acting over a first surface (4a, 27) by reason of its engagement with a second surface (3) presented by a sheet-form member (1). The second surface is formed with projections (4), the tips (6) of which deflect, in a direction parallel to the plane of the sheet, when subjected to the force. Recording means (7) record the displacement of the tips, and equipment (9) computes the magnitude and the direction of the shear force by reference to that displacement. The specification particularly describes the application of the invention to the measurement of shear forces acting upon a human foot, and to mechanical fingers used to grip components in the course of a robotic assembly process.