Online detection method for forming process of straight seam steel pipe

The invention provides an online detection method for a straight seam steel pipe forming process, which comprises the following steps: establishing a measurement coordinate system, and driving a steel plate to approach a two-dimensional scanning laser sensor; when the laser sensor does not detect a steel plate signal, the two-dimensional scanning laser sensor obtains laser coordinate data of a large number of points between the A and the B on the steel plate, and the linear distance between the A and the B on the steel plate is calculated and recorded as chord length L; calculating the length of the steel plate between A and B on the steel plate, and recording the length as arc length S; calculating an equivalent arc radius R; and the equivalent arc radius is compared with an ideal arc, the forming bending quality is judged, and the forming process parameters are optimized in time. According to the method, the storage and recording functions of the pattern-changing data can be realized, the pattern-changing a