Non-contact type torque and angle of rotation sensing device and measurement method using same

摘要

A non-contact type torque and angle of rotation sensing device consisting of a magnetic member, sensing members and a computing unit for measuring a torque being applied to rotate a transmission member and the angle of rotation of said transmission member in a first axial direction is disclosed. The magnetic member defines a first center, and is mounted on and rotatable with the transmission member. The magnetic member deflects relative to the transmission member in a nonparallel manner relative to the first axial direction when rotating with the transmission member. Sensing members induce a magnetic field variation to output respective electrical signals that exhibit a phase difference there between. The computing unit receives and calculates the electrical signals of the sensing member to obtain the amplitude and to further translate the amplitude into torque value and angle of rotation.

主权项

1. A non-contact type torque and angle of rotation sensing device for measuring a torque being applied to rotate a transmission member and the angle of rotation of said transmission member in a first axial direction, the non-contact type torque and angle of rotation sensing device comprising:
a magnetic member mounted on said transmission member and rotatable with said transmission member by the torque being applied to said transmission member, said magnetic member comprising a first center, said magnetic member being deflectable relative to said transmission member in a predetermined direction in a nonparallel manner relative to said first axial direction to create an amount of deflection between said first center of said magnetic member and said first axial direction of said transmission member during rotation of said transmission member by the applied torque; a plurality of sensing members adapted to commonly detect a magnetic field variation created and to output a respective electrical signal during rotation of said magnetic member, the electrical signals outputted by each two said sensing members indicating a phase difference, the amplitude of each said electrical signal being directly proportional to the amount of deflection of said magnetic member; and a computing unit adapted to receive the electrical signals outputted by said sensing members and to compute the amplitudes of said electrical signals, thereby obtaining the value of the torque being applied to said transmission member and the angle of rotation of said transmission member.