Intelligent detection system and method for micro-pore shape of fuel injection nozzle based on machine vision

Abstract

The invention relates to an intelligent detection system and method for the micro-pore shape of a fuel injection nozzle based on machine vision. The system comprises an electron microscope, an image processing system, a master control system and a rotating stage, wherein the electron microscope, the image processing system and the rotating stage are connected with the master control system separately, the electron microscope is further connected with the image processing system and used for obtaining a primary observation image and secondary observation image of a micro-pore of the fuel injection nozzle, the image processing system is used for processing the primary observation image and the secondary observation image and judging whether or not the micro-pore is qualified and a deformed region of the micro-pore, a result image is displayed in real time, and the master control system is used for controlling the movement of the electron microscope and the rotation of the rotating stage.The intelligent detection system and method for the micro-pore shape of the fuel injection nozzle based on the machine vision have the advantages that the full automation and intellectualization of the micro-pore of the fuel injection nozzle are achieved, and the problems in the prior art that the manual detection efficiency is low, the labor intensity is large, the quality of classification is uneven, and the misjudgment rate is high are solved.

Description

technical field [0001] The invention relates to the technical field of automatic production, and more specifically, relates to a machine vision-based intelligent detection system and method for micro-hole shape of fuel injectors. Background technique [0002] Diesel engine fuel injectors have multiple tiny nozzle holes. The nozzle holes are usually processed by electric spark drilling first, and then processed by liquid extrusion and grinding to improve the flow coefficient, atomization effect and fuel efficiency. However, after extrusion grinding, the nozzle hole may be deformed sometimes. If the orifice of the injection hole is deformed, it will have a great impact on the fuel atomization effect and reduce fuel efficiency. Therefore, in order to ensure the quality, it is necessary to detect the deformation of the orifice of the nozzle hole after extrusion and grinding. The hole shape of each nozzle hole on the nozzle is relatively round and no gap is found to be qualified...

AI Technical Summary

Problems solved by technology

In addition, due to the different heights of the holes on the spherical or conical surface, some holes are not in the center of the image during detection. According to the imaging principle, it will cause certain barrel distortion and cause misjudgment.

Therefore, this manual detection method has low efficiency, high labor intensity, uneven classification quality, and relatively high misjudgment rate.

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