Patent ID: 9201087
Filing Date: 2015-12-01
Classification: G01P

Abstract:
1. A device for measuring speed of moving oblong products in movement along a determinate direction of feed (F) and emitting radiations, comprising: at least two sensors for radiations, suitable to detect overall energy emitted by the moving oblong product, disposed reciprocally at a close distance and each able to define a respective optical observation window, disposed at a known and pre-arranged distance from each other, each window configured to always cover an image of a determinate portion of advancing said product equal to a width of the relative window, irrespective of the movements made by said portion transversely to the direction of feed, each of said windows having an oblong rectangular shape, said sensors for observing said portion of product presented, on each occasion, in correspondence with the associated windows consecutively along the direction of feed (F), said sensors also for continuously measuring intensity of the radiation associated with the overall energy emitted by the moving product and emitted by the portion of product in correspondence with the windows; an electronic processing unit able to determine, by processing electric signals associated with the intensity of radiation detected and arriving from the two sensors, using mathematical algorithms based on correlation principle, time taken by the portion of product to transit from a first window to a second, successive window, and then, on the distance between said two windows, to calculate the speed of the oblong product.