The sensor 3D "Shapescan" of Isra Vision introduces a highly flexible and cost-effective solution for the so-called "handle in the box". Unsorted parts can be removed from the transport container in a targeted manner with the robot and fed directly into the production process without complex mechanical constructions.
The sensor uses two standard cameras and special laser illumination to accurately determine the location of individual parts in containers. It is fixed stationary above the box and has by default containers up to slightly more than the size of a Euro pallet completely in view. An elaborate kinematics for moving the sensor is not necessary. Nevertheless, the system works very fast: For the scanning of a typical grid box (about 1200 x 1000 x 800 mm) over the entire volume, the scan time is less than 2 s. Shapescan delivers an accuracy of a few millimeters. If other box sizes are used, the distance between the two camera units of the sensor can be flexibly adjusted. Also, the sensor can be attached to the robot mobile. In this case, the robot no longer sees the entire box at once, only individual sections. From several cutouts, the sensor can assemble a precise overall picture. In addition, there is a sensor variant with four cameras, which is designed for applications with very high speed requirements.
New method: 3D Shape Sampling
The special intelligence of the sensor solution lies in the sophisticated software: the 3D cameras scan the boxes and a so-called 3D point cloud is created, which represents the objects to be detected in the transport packaging. With the newly developed evaluation method of the 3D Shape-Sampling geometrical primitives in the point cloud are determined first. The software then compiles more complex objects from these primitives. Thus, without prior knowledge, differently shaped object parts can be reliably identified. A robust recognition of the part geometry of even unsorted objects is ensured. The laser line projection serves to determine the position of the object parts in the depth. It allows the sensor to see in the third dimension. Since several parallel lines are evaluated simultaneously, the sensor works much faster. The "depth view" allows the robot to empty the complete transport container without any intermediate layers. Access is no longer limited to just one level. In addition, this process is insensitive to contamination.
Costs down, flexibility up
With the 3D Shapescan sensor, the manufacturer presents an easy-to-handle and highly flexible solution for automated handling in the crate for simple to highly complex parts even in harsh production environments and at high processing speeds. Manufacturing and assembly companies save significant cost, valuable manufacturing time and significant manufacturing flexibility with the sensor solution - with the lowest noise emissions, ease of installation and virtually no extra space.