EVT Accessing difficult-to-reach geometries for quality assurance easily
The Eye Vision software uses digital image processing methods to provide quality assurance of components with difficult-to-access geometries.
EVT's Eye Vision machine vision software from EVT uses digital image processing methods to provide quality assurance of components with difficult-to-access geometries. Application areas include quality inspection of inner walls of bore holes.
After a bore hole has been threaded, Eye Vision inspects the internal thread to ensure that the thread area is free of drill chips. EVT says Eye Vision provides fast and reliable inspection to check defects and irregularities. It uses super wide-angle optics that allow for the bore hole to be imaged from the outside, avoiding having to immerse into the drill hole to inspect. This saves time compared to endoscopic images based on visual inspection systems that are used until now. Furthermore, Eye Vision software provides additional appropriate illumination and evaluation to simplify quality inspection.
According to EVT, the inspection system is basically the camera and the Eye Vision image-processing software. For the bore-hole inspection, a Basler camera was used to capture images, which were evaluated by the Eye Vision software. The inner surface of the hole was inspected for particles and foreign objects, verifying the completeness of the thread by detecting damage and irregularities in the thread. The Eye Vision software has a single command for thread inspection, which makes programming the inspection much easier. It offers a consistent user interface for a large variety of image-acquisition and image-processing tasks, adapting well to each task. Users without programming knowledge can create and modify case-specific evaluation algorithms, thanks to the simple user guide and drag-and-drop programming .
Lighting is also a special challenge as standard products do not meet the requirements of these applications. Here, EVT uses lighting from Opto Engineering, which enables reliable illumination of the bore hole, particularly in incident light mode.
The system can also be used for applications with wider physical limits: drill holes ranging from 0.5-mm diameters up to depths of three times the diameter size.
The system also detects correct thread entry and exit as well as completeness. Mechanical residue along the entire bore path and damage to the bottom of the bore in blind holes are also detected.