Eight-degree-of-freedom linear structure optical variable pitch screw measuring device

The invention discloses an eight-degree-of-freedom linear structured optical variable pitch screw measuring device, which is used for carrying out rapid, complete and accurate three-dimensional coordinate non-contact measurement on a variable pitch screw, and belongs to the field of precision test technology and complex curved surface measurement. The adjustable automatic clamping module is designed and can be used for installation of various types of variable-pitch screws from small to large, the linear structure optical sensor has eight degrees of freedom, optimal angle adjustment can be conducted in the normal direction of a target spiral line, the light re-reflection phenomenon is avoided, and more complete variable-pitch screw left and right curved surface contour data are obtained. The problems that an existing measuring device is low in efficiency, inaccurate in measurement, insufficient in sensor angle adjustment freedom degree, large in weight and inconvenient in screw precision measurement and insta