EP 0201576 B1 19890118 - METHOD FOR DETECTING THE POSITION OF THE BAND EDGE OF A MATERIAL SHEET
Title (en)
METHOD FOR DETECTING THE POSITION OF THE BAND EDGE OF A MATERIAL SHEET
Publication
Application
Priority
- DE 3442154 A 19841117
- EP 8500598 W 19851109
Abstract (en)
[origin: WO8602913A1] In a method for detecting the position of the band edge of a material sheet (1) by means of an ultrasound detector comprised of an emitter (2) and a receiver (3) and arranged in the region of the band edge, the sound waves received being converted into an electric signal. In order to reliably suppress the influence of reflected waves from the result of the measurements, the emitter (2) sends individual pulses or wave packets which are time offset. The wave packets (or individual pulses) received by the receiver (3)are converted into a corresponding series of electric vibrations, a limited part of the series of vibrations being analysed and the analysis value being recorded to be further processed. A device used to implement the method comprises an emitter (2) supplied by a pulse generator (4), a pick value rectifier (6) connected after the receiver (3), which provides an electric signal, and an activatable transmission circuit (9), connected after the pick value rectifier (6) to transmit the pick value to a memory (10).
IPC 1-7
IPC 8 full level
B65H 23/02 (2006.01); B65H 23/032 (2006.01); G01B 17/00 (2006.01); G01V 1/00 (2006.01)
CPC (source: EP US)
B65H 23/0204 (2013.01 - EP US); Y10S 367/902 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 8602913 A1 19860522; DE 3442154 A1 19860528; DE 3442154 C2 19890831; DE 3567618 D1 19890223; EP 0201576 A1 19861120; EP 0201576 B1 19890118; EP 0201576 B2 19940504; JP H06105172 B2 19941221; JP S62501520 A 19870618; US 4901292 A 19900213
DOCDB simple family (application)
EP 8500598 W 19851109; DE 3442154 A 19841117; DE 3567618 T 19851109; EP 85905810 A 19851109; JP 50512785 A 19851109; US 88832286 A 19860711