Visual inspection system for large precision shaft part

Abstract

The invention discloses a visual inspection system for a large precision shaft part. A control module sends a control command to a measurement module. The measurement module controls a vision sensor module to detect a shaft to be detected. The emitter in the vision sensor module emits uniform and stable line structured light, and the receiver in the vision sensor module converts the received lightinformation into the surface data information of the shaft to be detected and transmits the information to an industrial control computer, and finally the industrial control computer receives and processes the information and displays and prints the detected results. Data acquisition and processing are completed by the industrial control computer, data transmission is automatically performed andthe measurement result can be obtained in real time. Besides, there is no direct contact with the part in the detection process so that the scratch phenomenon of the detected part caused by the contact in the measurement process can be avoided, the error caused by subjective factors or environmental factors in the manual detection can be avoided and thus the detection results are more objective.

Description

technical field [0001] The invention relates to the field of detection of mechanical parts, in particular to a visual detection system for large precision shaft parts. Background technique [0002] The development of the machinery manufacturing industry is inseparable from the improvement of the shape error measurement technology, and the measurement of coaxiality and straightness is an important part of the shape error measurement of shaft parts. Today, the precision and scale of industrial manufacturing are constantly improving. , People have higher and higher requirements for the measurement of shape and position error of shaft parts. [0003] At present, conventional measurement uses measuring instruments (vernier calipers, outer micrometers, go-no-go gauges, calipers, vertical optical meters, roundness meters or three-coordinate measuring machines, etc.) to measure directly with the surface to be measured. The measuring force is generated between the instrument and the...

AI Technical Summary

Problems solved by technology

[0003] At present, conventional measurement uses measuring instruments (vernier calipers, outer micrometers, go-no-go gauges, calipers, vertical optical meters, roundness meters or three-coordinate measuring machines, etc.) to measure directly with the surface to be measured. The measuring force is generated between the instrument and the surface to be tested, and it is easy to leave scratches on the tested piece during the testing process, causing damage to it and affecting the measurement accuracy; and most of them are manually tested, and different testing personnel use different forces when holding the measuring instrument , the measurement results will be different, and there will be visual errors in the readings. Once there are many measurement parameters or are affected by external factors, the inspection personnel will be easily tired and the measurement speed will also decrease; some inspection instruments such as roundness meters and three-coordinate measuring machines , high cost, high measurement cost, not only high requirements on the use environment and conditions, poor anti-interference ability, but also restrictions on the size of the tested part, generally only used for the detection of small-sized shaft parts

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