Method for the position detection of the strip edge of a material web
US4901292A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1986 |
| Grant date | Feb 13, 1990 |
| Priority date | — |
| Expiry date | Jul 11, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/902
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method for the position detection of the strip edge of a material web by means of an ultrasonic detector disposed in the strip edge region uses a transmitter 2 and a receiver 3, the received sound waves being transformed into an electric signal. To be sure to eliminate the influence of reflected waves on the measurement result, the transmitter 2 emits mutually time-shifted single pulses or wave packets. The wave packet (or single pulse) received by the receiver 3 is transformed into a corresponding electric oscillation packet, a limited area of the oscillation packet is scanned and the scan value is stored for further processing. An arrangement for the performance of the method comprises the transmitter 2 which is fed by a pulse train generator 4 the receiver 3 for delivering an electrical signal, an activatable peak rectifier circuit 6 connected to the receiver and an activatable transmission circuit 9 connected to the rectifier for transmission of the peak value to a memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.