Professional laser triangulation sensors have proven an ideal technology for measuring thickness of products. Noncontact operation allows accurate measurement of soft, gummy, materials as well as product moving at high speed.
In a typical thickness measuring application, two triangulation sensors are used, one above the material and one below the material. Outputs of the two sensors are compared differentially to determine the material thickness. This approach provides accurate thickness data even if the material location moves up or down.
To measure variations in thickness across the width of a product, the sensors are mechanically scanned over the width of the material.
Moving product often has variation in surface texture, reflectivity or color, so sensor data must not be influenced by these changes. To insure that these variations do not influence sensor performance, LMI includes an automatic gain control feature in each sensor which automatically compensates for any surface changes.
For products that are soft or deformable from contact gaging, or which are abrasive and will wear contact probes, laser triangulation provides an ideal non-contact measurement solution. High frequency response provides detailed information about local thickness variations, even for fast moving product.
Our applications division works closely with System Integrators & Original Equipment Machine Suppliers to deliver the most effective solutions for their particular sensor vision needs.
