The measurement of holes and the determination of their position is a special challenge. EyeVision 3D software offers precise 3D measurements with more than 40 specialized commands.
In the case of sheet metal components, it is possible to capture the whole component geometry in a high-resolution point cloud by using visual 3D metrology. A precise metrology command set allows correctly defining various measurements in a point cloud and their coordinates in relation to other results with only a few commands.
Typical characteristics such as hole patterns, cut/trimming, and resilience on edge laps of car bodies can also be measured exactly.
For the inspection of weld seams, as well as adhesive beads, EyeVision 3D software uses the ProfileMatch command. Just a simple parametrization allows the evaluation of profiles and issues an analysis of the detected defect. A detailed protocol for all measurement results can be issued with just a few mouse clicks.
With the complete command set of EyeVision software it is possible to configure the application with 2D cameras and 3D sensors. For example, the point cloud can be displayed as 2½D image, and read an embossed or engraved lettering with a 2D OCR module. This is useful when reading DOT code on a tire or stamped numbers in metal.
EVT image processing software supports various 3D sensors of different technologies, including: AT Automation Technology, Gocator from LMI, Basler ToF, Wenglor, QuellTech, ShapeDrive, Zivid, etc (see table below).
||EyeVision 3D supported Maker
|Time of Flight
||AT Automation Technology
More 3D sensors which will be supported by EyeVision 3D are about to follow.
EyeVision software provides the integrated “brain” of the 3D sensor. EyeVision allows the sensor not only to capture an image but also to use the complete 3D command set of the software to measure, compare and read the 3D point cloud or 2D gray-scale image.
The Gocator is a compact sensor in an industrial housing with a protection class of up to IP67. It has two digital outputs, RS485 Serial and one analogue output (4 – 20 mA). More than one of the Gocator sensor families can be used with effortless configuration and synchronization.
With the EyeVision machine vision software the sensor has various commands available. Starting with the “3D Blob” command which is very versatile and can be used count objects within a point cloud, the software contains commands to measure openings (holes, slots), cylinder, studs (threaded and non-threaded), plane, etc. It has also 3D volumetric tools: volumes, areas, bounding boxes, positions (min, max, centroid), ellipses, orientations, etc.
Additionally, the 3D-software now also has a “RectProbe” command to find edge-points in a certain direction and returning the detected edge. This can be useful for additional measurements on the point cloud. There are also various filter commands such as “Merge”, which merges two point clouds into one, or the filter command “Outlier Removal”, which removes all points that deviate in Z-direction from their neighbors by a certain amount. Also important is the “Voxelgrid” filter, which down-samples a point cloud using a voxel grid and outputs points that are the average of all points inside a voxel. The filter can make unordered point clouds into ordered.
EyeVision software utilizes a graphical user interface. The commands can be drag-and-dropped in a program editor, where the inspection program can be created, even without programming skills.
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FSI Technologies Inc. now offers high speed 3D imaging sensors, cameras and systems from Automation Technology GmbH. Automation Technology’s series of 3D components and all-in-one systems for rapid three-dimensional measurement are based on the latest laser-scanning triangulation algorithm.
At the heart of the product range are the CX series of high-speed 3D cameras. By offering these products, FSI will enable our customers to perform industrial inspection tasks with greater accuracy and efficiency and at lower costs. Thanks to the intelligent way the camera processes the image data, CX technology allows rates of measurement not previously attained. Typical usese include inspection, measurement and grading applications.
The products are available for separate purchase, or as part of a complete machine vision system. Call FSI today or visit AT.fsinet.com to see how these new 3D products can be used in your inspection applications.
The EVT (EyeVision Technology) EyeScan AT 3D uses a three-dimensional sensor, whose data evaluation is carried out with the EyeVision image processing software. Using the 3D commands of the drag-and-drop programmable software, robot guidance becomes an easy-to-solve application.
For robot guidance, the 3D-positioning of the measuring object and its geometrical characteristics are detected. Additionally, the position discrepancy is calculated and the corrected data is forwarded to the robot system.
At the same time, the EyeScan AT 3D can inspect the surface of the objects, such as the surface texture of gingerbread cookies. During the baking process the gingerbread becomes slightly uneven and therefore has to be measured again separately one by one. The robot needs the orientation and height information for the subsequent sugar icing decoration of the pastry. For this application, the robot should position itself with the camera system above the gingerbread and then could measure and decorate the cookie.
Further application examples for the EyeScan AT 3D and EyeVision software are the adhesive bead and weld seam inspection, solar cell control, as well as tire and rubber inspection.
OCR can also be combined with 3D-surface inspection of embossed and debossed surfaces. The z-values of the 3D-inspection is recognized by the OCR-tool as lettering.
“Intelligent” sensors such as the EyeScan AT 3D are becoming increasingly relevant in industrial applications. By equipping an industrial robot with the proper sensors, the robot can carry out the task largely by itself.