Linear guide rail straightness measuring and judging device

The utility model discloses a linear guide rail straightness measuring and judging device which comprises a detection bench, a standard linear guide rail and a measured linear guide rail. The sliding block of standard linear guide rail is connected to a motor through a ball screw rod and is provided with a detection unit which comprises a distance measuring sensor, an angle sensor and a motor 2. The distance measuring sensor and the angle sensor are connected to a data processor through data lines. The data processor is orderly connected to a touch screen and a controller through data lines. The controller is connected to the motor and a motor 1. The linear guide rail straightness measuring and judging device has the advantages that through the induction of a geometry calculation method, the complexity of existing linear guide rail straightness measuring and judging equipment or method is greatly simplified, the cost is reduced, at the same time, the surface of a product is not damaged through non-contact mea