Patent ID: 6050126
Filing Date: 2000-04-18
Classification: B60G,B60T,G01L

Abstract:
A stress sensor for measuring vehicle wheel operating forces, the operating forces four divided stress components generated when a braking force is applied to the vehicle wheels, comprising:one set of uniaxial sensor segments attached with respect to an axle of a vehicle, said uniaxial sensor segments each comprising a plane substrate attached in said axle which defines an obverse face and a reverse face, and having a pair of strain gauges on said obverse face and said reverse face;bridge circuits each having a strain gauge of said one set of uniaxial sensor segments for converting the strain amount detected by each of said strain gauges into an electric signal; andan arithmetic means connected to said bridge circuits for calculating stresses produced when the braking force is applied to the vehicle wheels in the form of four divided stress components, namely,a stress of F direction (horizontal to a road surface),a stress of N direction (vertical to a road surface),a stress of FB direction (torsional moment direction of a vehicle axle), anda stress of S direction (axle longitudinal direction),by applying four prepared equations to said electric signals which are responsive to each strain gauge of said one set of sensor segments from said bridge circuit respectively.