Glossaire technique
Cable testing and validation
As vision systems evolve, we tend to see more cameras per system, faster data rates and the use of network technology between the camera and PC. All these factors increase demands on the cabling and poor cabling or incorrect network switches can have serious effects.
Cable: Definition of cable types
In imaging and machine vision selecting the right cable can be an important consideration. A wide range of technical requirements, including mechanical, thermal or chemical impacts, have to be considered. The following table gives a short overview of the most common cabling specifications used for imaging and available from STEMMER IMAGING.
Câbles : Cat6 / Cat 5 / Paire torsadée
Paire torsadée avec une fréquence de fonctionnement jusqu’à 250 MHz pour la transmission de langue, de données, multimedia et les réseaux ATM.
Câble Cat6 | Câble Cat 5/5e | Paire torsadée
Câbles pour applications robotiques
Câble avec haute résistance à la torsion et bonne propriété de flexion et qui est apte à l’usage dans les applications robotiques.
Câbles pour chaînes porte-câbles
Câble adapté aux flexions fréquentes dans les systèmes des chaînes porte-câble et qui a ainsi une plus longue durée de vie qu’un câble standard.
Camera features and functionalities
Image fidelity, Exposure time, Frame rate
Camera manufacturers include a wide range of functions in their products to meet the increasing demands of the industrial market. Some of the key camera characteristics and common features are discussed in this section.
Camera interfaces
Interfacing cameras to computers for image processing has changed significantly in the last few years. In recent years the industry put a lot of effort into standardisation and several standards such as CameraLink, DCAM/IIDC and GigE Vision emerged. In addition GenICam has been approved, offering genuine ‘plug and play’ functionality for industrial vision cameras.
CameraLink
CameraLink is administered by the AIA (Automated Imaging Association) and is an official standard.
Caméras : 3D machine vision
Today 3D machine vision is most commonly used for the precise three- dimensional inspection and measurement of complex 3D free formed surfaces, but new fields of applications are constantly being explored.
Caméras : Caméras linéaires
Si des erreurs sur des rubans d’acier, des bandes de papier ou d’autres matériels continus doivent être contrôlées à des vitesses très rapides lors de leur fabrication, les systèmes de traitement d’images basés sur les caméras linéaires constituent souvent la seule solution réalisable du point de vue technique et économique. L’article suivant commente l’état de la technique pour des systèmes de ce genre.
