Device and method for automatically measuring and adjusting poses of precision parts based on ultrasonic waves

Abstract

The invention belongs to the field of precision measurement and assembly, and provides a device and method for automatically measuring and adjusting poses of precision parts based on ultrasonic waves. Precision parts are fixed by a part positioning module and a clamping module in the device. Two ultrasonic sensors in the clamping module can transmit and receive ultrasonic signals, and the ultrasonic signals are transmitted to the PC through a control loop. The deformation amount of an elastic block in an active clamping finger can be obtained by extracting the time interval between two adjacent ultrasonic pulses in the ultrasonic signals. The poses of the precise parts are obtained through the geometrical relationship between the positions of the ultrasonic sensors and the deformation of the elastic block, so that the precise measurement of the poses of the parts is achieved. Finally, precise adjustment of the poses of the parts can be achieved through a pose adjusting module. The method can achieve automatic measurement of the poses of the precision parts, is high in measurement precision, short in time and high in automation degree, does not need calibration, and can be suitable for assembly of precision components.

Description

technical field [0001] The invention belongs to the field of precision measurement and assembly, and in particular relates to an ultrasonic-based automatic measurement and adjustment device and method for the position and posture of precision parts. Background technique [0002] Most of the precision components in the fields of aviation, aerospace and precision instruments have the characteristics of small size, complex structure and high assembly precision. The adjustment of part pose (position and attitude) in the assembly process of precision components is the key to affect the assembly accuracy. At present, most of the methods of machine vision are used to measure the pose of precision parts. However, due to the influence of part processing quality, there are often defects on the edge of parts, which makes it difficult to obtain accurate part edge information based on image fitting methods, resulting in measurement errors of part pose and ultimately reducing the assembl...

AI Technical Summary

Problems solved by technology

The fitting error of the part edge will lead to the measurement accuracy of the part centerline pose, which will eventually lead to assembly errors

Therefore, the current detection methods still have defects in the pose measurement and attitude adjustment of precision components, and it is difficult to meet the assembly requirements of precision components.

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