ELECTRONIC SENSORS
How 3D vision sensors are transforming industrial operations
By Yoann Lochardet, Teledyne Vision Solutions W
ith the rapid evolution of 3D sensor technology, new possibilities are emerging across applications such as manufacturing and logistics. These new sensors are driving improvements in more precise scanning of fast-moving objects, free from motion artefacts. McKinsey & Company, Industry 4.0 is the next phase in the digitisation of the manufacturing sector, driven by disruptive trends including the rise of data and connectivity, analytics, human-machine interaction and improvements in robotics. Due to the limitations of 2D vision around precision and distance measurement for complex object recognition and dimensioning, the arrival of Industry 4.0 has increased demand for 3D vision, which offers higher levels of performance in a variety of challenging conditions.
to these applications such as improved quality control, increased automation, enhanced safety and optimised storage.
How industrial CMOS image sensors are evolving
designed for 3D solutions which lead to In the case of Indirect Time of Flight (iToF) systems, these sensors embed a brand-new pixel design using Teledyne e2v’s patented HiRho technology which enables outstanding near-infrared sensitivity and precision. Also, they incorporate key features such as a powerful high dynamic range management to deal with wide distance demand for iToF devices continues to grow in industries such as robotics, logistics, construction mapping and intelligent transportation systems (ITS). on-chip features providing both 2D and 3D image quality in all distance ranges and environmental conditions, the Teledyne e2v’s Hydra3D+ sensor sensor suitable for these applications.
Use case: Parcel, freight, or cargo dimensioning
In-motion dimensioning involves the process of quickly capturing and accurately measuring dimensions like the length, width and height of objects while they are on a conveyor belt or moving platform, passing through the system at high speed. 3D vision-based systems are commonly used in logistics, warehousing and shipping industries to automate the dimensioning with advanced on-chip features at the sensor level, they are robust to interferences, in both indoor and outdoor settings, while maintaining good performance levels. Offering high resolution, they enable a resolution to get complete coverage of the entire pallet, for example, exceeding 1 meter in size and without any motion artefact. Automating the dimensioning process reduces the need for manual measurements, which helps to reduce errors, save time and cost and enhance productivity, particularly in environments where large volumes of packages need to be processed rapidly.
Innovative 3D sensor technology surpasses static stations by enabling real-time dimensioning in any conditions with a scalable range detection, precisely measuring distances from a few centimeters to several meters, with up to millimeter-level accuracy.
10 attributes to consider for 3D systems
When considering 3D systems, several key application parameters should be considered: Distance range: Minimum to maximum distance to be covered by the 3D systems. Precision and accuracy: Degree of performance required. Resolution: The size of the object to be measured or the level of detail captured in the scene.
Field of View (FoV): Also linked with the resolution for the angular resolution. Speed: Frame rate, latency, etc. Minimum and maximum Indoor/outdoor operation (ambient light). Adaptability: Not all 3D techniques are suitable to work in multiple and changing operating conditions (light, range, indoor/ outdoor, precision) particularly if this needs to happen frame-to-frame. Ease of integration and operation: What would be the effort to integrate the 3D be the calibration and manufacturing setup to operate properly in the factory or Cost: Evaluate the cost-to-performance ratio of the 3D technique.
Advances in 3D sensor technology mean enhanced quality.
22 NOVEMBER 2024 | ELECTRONICS FOR ENGINEERS
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