Double-sensor pile foundation length detection device based on low strain method

The utility model discloses a double-sensor pile foundation length detection device based on a low strain method, which comprises a base, a sliding rail is arranged on the base, and a sliding table is connected in the sliding rail in a sliding manner; a pushing mechanism is arranged between the sliding table and the base; a guide pipe is arranged on the side edge of the sliding table, an open groove is formed in the side edge of the guide pipe, and two movable seats are arranged in the guide pipe and arranged at the upper end and the lower end of the guide pipe at intervals. A sliding hole is formed in a bottom plate of the movable seat, and a guide rod is connected into the sliding hole in a sliding mode. A mounting box is fixed at the top of the guide rod, and a thread part is arranged at the tail; an adjusting nut is installed on the threaded part, an acceleration sensor is arranged in the installation box, and a touch rod is arranged on the front face of the installation box. And the guide rod between the