Light beam locking strain gauge position device for Hopkinson bar system

The utility model relates to a light beam locking strain gauge position device for a Hopkinson bar system. The device comprises a circular ring device, a positioning circular cover device, a guide positioning device and a locking device, the circular ring device comprises an upper half positioning circular ring, a lower half positioning circular ring, an upper guide hole and a lower guide hole; the positioning round cover device comprises an upper half positioning round cover, a lower half positioning round cover, an upper threaded rod, a lower threaded rod, an upper handle, a lower handle anda quick connector. Wherein the guide positioning device comprises an upper positioning beam, a lower positioning beam, an upper guide groove, a lower guide groove, an upper controllable trolley, a lower controllable trolley, a red laser lamp beam and a limiting hole, and the locking device comprises an upper locking plate, a lower locking plate, an upper locking hole, a lower locking hole, a nutand a screw. According to