Microscale material torsion testing device and method based on feedback tracking

The invention provides a micro-scale material torsion testing device and method based on feedback tracking. The testing device comprises a data acquisition and control unit, a rack, a torque measuring mechanism and a driving and torsion angle measuring mechanism, the torque measuring mechanism is used for measuring the torque loaded on the to-be-tested sample and comprises an upper suspension assembly mounted at the upper part of the rack in a matched manner, a lower suspension assembly mounted at the lower part of the rack in a matched manner, and an electromagnetic induction assembly and a measuring assembly which are mounted in the middle of the rack in a matched manner; the driving and torsion angle measuring mechanism is installed in the middle of the rack in a matched mode. A to-be-tested sample is clamped between the driving and torsion angle measuring mechanism and the measuring assembly in a matched manner; the data acquisition and control unit is electrically connected with the electromagnetic induc