Rock stratum displacement monitoring device based on belt transmission

The utility model discloses a rock stratum displacement monitoring device based on belt transmission. The utility model belongs to the technical field of rock stratum displacement monitoring. The technical problem to be solved by the utility model is how to avoid rock stratum displacement measurement data errors caused by equipment. The rock stratum displacement measurement precision is improved;rock stratum displacement values can be conveniently observed and recorded manually; meanwhile, linear displacement can be converted into a rotating angle variable, and conditions are provided for converting the rotating angle variable into an electric signal for processing and remote monitoring; according to the technical scheme, the device structurally comprises a base point anchoring device, asleeve, a shell and two take-up boxes, the two take-up boxes are each internally provided with a steel strand, and the two steel strands extend out of the two corresponding storage boxes respectivelyand sequentially penetrate