Device, system and method for measuring bending angle of bent piece

Abstract

The invention discloses a device, system and method for measuring the bending angle of a bent piece. The device comprises a receiver and a controller. The receiver is used for receiving a bending face image of the bent piece, and the bending face image comprises two bending edges forming the bending angle. The controller is connected with the receiver and comprises a preprocessing module, an edge detection module, a straight line detection module and a bending angle calculation module. The preprocessing module is used for carrying out graying processing on the received bending face image; the edge detection module is used for carrying out edge detection on the grayed image to extract image edges; the straight line detection module is used for detecting straight lines in the image edges and combining and screening the detected straight lines to obtain straight lines forming the two bending edges of the bending angle in the bending face image; the bending angle calculation module is used for calculating the bending angle of the bent piece according to the slope of the obtained straight lines of the two bending edges. The device, system and method for measuring the bending angle of the bent piece have the advantages of being high in measurement efficiency, high in precision, high in stability and the like, and can achieve dynamic measurement.

Description

technical field [0001] The present invention relates to the technical field of measurement, in particular to a device, system and method for measuring the bending angle of a bending part. Background technique [0002] In the field of construction machinery, the quality of the boom of the crane is directly related to the overall performance of the crane, and the cross-sectional shape of the boom is the main factor affecting the bearing capacity of the boom. Therefore, in the boom forming manufacturing process, the angle control of its bending parts is particularly important. In the prior art, methods for measuring the angle of a bending piece include mechanical measurement, electromagnetic measurement, manual measurement, and optical measurement. [0003] In recent years, aiming at the limitations of contact detection methods (mechanical measurement, electromagnetic measurement, manual measurement, and optical measurement, etc.), an angle detection method based on image proc...

AI Technical Summary

Problems solved by technology

This non-contact measurement method currently only uses the least square method to fit the acquired points into an edge line, and the accuracy of the measured angle is not high.

Moreover, when there is interference in the collected image data (for example, in an industrial field environment), the above fitting method cannot accurately fit the edge line, and even cannot complete the measurement of the bending angle

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