Relative displacement sensor based on laser ranging technology

The utility model discloses a relative displacement sensor based on a laser ranging technology, which comprises a shell and a ranging assembly, and the ranging assembly is arranged between the top end of a bottom shell and the bottom end of a top cover and is used for laser ranging. The distance measuring assembly comprises an integrated circuit board and a laser distance measuring module, the bottom end of the integrated circuit board is fixedly connected with the top end of the bottom shell, and the laser distance measuring module is electrically connected to the top end of the integrated circuit board. According to the utility model, the laser divergence angle is designed to be less than 2card, so that an object with a diameter of 1.5 cm can be measured at a position of 7.5 m; therefore, the problem that a non-contact displacement sensor based on laser ranging is used for monitoring the displacement of important pipelines in an underground pipe gallery is well solved, the service life is long, the monitori