DETECTION OF NORMAL AND SHEARING MOVEMENTS USING MAGNETORESISTORS

A sensor using four magnetoresistors has been developed that can disti nguish between normal and shearing movements. Empirical equations have been determined to calculate the values of normal and shearing motion s from the four sensors' outputs. The use of a miniature coil with an alternating current substantially reduces thermal drift effects, im pr oves repeatability and reduces power consumption. The sensor has appro ximate dimensions of 4 mm x 4 mm x 4 mm an therefore can be considered relatively miniature.