Special device for precisely measuring geometric state of high-speed railway track

A special device for precisely measuring the geometric state of a high-speed railway track detects a track body through a prism and comprises a base and a connecting rod. The base is in a right-angle bent shape capable of being correspondingly attached to the top and one side of the rail body, the interior of the base is hollow, and the horizontal plate face and the vertical plate face of the inner side of the base are both made of non-ferromagnetic materials. A vertical connecting rod is arranged in the center of the top of the base horizontal plate, a prism is arranged on the top of the connecting rod, openings are formed in the two sides, corresponding to the connecting rod, of the base horizontal plate and the position, close to the center of the bottom, of the base vertical plate, and magnetic attraction devices are arranged in the openings. The magnetic attraction device comprises a non-ferromagnetic guide sleeve, a permanent magnet and a pull rod; the prism is simple in structure and convenient to use,