SELF-DRIVEN JOINT

摘要

Disclosed is a self-driven joint in the technical field of driving, sensing and control, comprising a casing tube (1), a structural permanent magnet (3) and a magnetic field generation device. The structural permanent magnet (3) is disposed inside the casing tube (1) being rotatable about the axis of the casing tube (1). The magnetic field generation device is fixedly disposed outside the casing tube (1). The magnetic field generation device comprises: a magnetostrictive piezoelectric sensing device and corresponding electromagnetic coils (6) thereof. Several pairs of the electromagnetic coils (6) of opposite polarity are disposed opposite on an outer wall of the casing tube (1). The magnetostrictive piezoelectric sensing device is fixedly disposed on a side wall of the casing tube (1). The self-driven joint has a compact structure and high structural strength, and can conveniently obtain a sensing electric signal without being driven by a power supply.