DEVICE FOR DETECTING AND COUNTING METAL ELEMENTS
1 Assignment
0 Petitions
Accused Products
Abstract
A device for detecting metal elements in slab form such as metal plates or sheets, includes an emission coil powered by suitable control elements and generating a magnetic field, a reception coil placed so as to enable generation via induction of a voltage across the terminals of the coil under the action of the magnetic field, and elements for processing and evaluating the voltage signal delivered by the at least one reception coil, enabling delivery of an information signal indicating the absence or presence of one or more metal elements near the coils. The emission coil (3) and the reception coil (5) are both mounted in a housing or a sensor head having an active detection face having an associated detection region, and are positioned at a defined inclination one relative to the other and relative to the face.
-
Citations
29 Claims
-
1-12. -12. (canceled)
-
13. Device for detecting metal plate elements such as metal sheets or plates, intended in particular to work with or to be incorporated into a system for selection, movement, transfer and/or positioning or the like of such elements,
a device consisting mainly, on the one hand, of an emission or emitting coil (3) supplied by suitable control means and generating a magnetic field; - on the other hand, of a reception or receiving coil (5) placed so as to make possible the generation by induction of a voltage at the terminals of said coil under the action of the aforementioned magnetic field, and, finally, of means (6, 7) for processing and evaluating the voltage signal provided by said at least one reception coil (5), making it possible to provide an informative signal indicating the absence or the presence of one or more metal elements (2) in the vicinity of said coils (3,5),
these coils (3 and 5) being positioned with a specific inclination, in such a way that the magnetic coupling between the two coils (3 and 5) is changed by the presence of one or more nearby metal elements (2), a device (1) characterized in that the emission coil (3) and the reception coil (5) are both mounted in a case or a sensor head (8) having an active detection face (9) with a corresponding detection area (9′
), and are positioned with a specific inclination in relation to one another and in relation to said face (9), and in that the magnitude of the change in the amplitude and/or in the power of the voltage signal at the terminals of the reception coil (5) due to the presence of a peripheral part or of the edge of one or more metal elements (2) near said active face (9) is picked up and used in a discrete manner by the processing and evaluation means (6, 7) to determine the number of metal plate elements (2) present. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
- on the other hand, of a reception or receiving coil (5) placed so as to make possible the generation by induction of a voltage at the terminals of said coil under the action of the aforementioned magnetic field, and, finally, of means (6, 7) for processing and evaluating the voltage signal provided by said at least one reception coil (5), making it possible to provide an informative signal indicating the absence or the presence of one or more metal elements (2) in the vicinity of said coils (3,5),
Specification