Pattern recognition using artificial neural network for coin validation
US5485908A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1994 |
| Grant date | Jan 23, 1996 |
| Priority date | — |
| Expiry date | Jul 12, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D5/02
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A coin validation system for determining if a coin moving along a coin rail is a valid coin, and if so, its denomination the system including a rail along which coins move, at least one optical sensor located along the rail to sense the presence or absence of a coin moving therealong, at least one magnetic sensor associated with each optical sensor located in the vicinity of the respective optical sensor, each of the magnetic sensors including an inductive element and a circuit for exciting the magnetic sensor to produce a field that is coupled to the coin moving past so that the coin and the inductive element have mutual inductance therebetween, the circuit ringing the magnetic sensor a predetermined number of times while the coin is adjacent to the magnetic sensor whereby the magnetic sensor generates a damped wave signal having characteristics representative of the physical and magnetic characteristics of the coin, a signal preprocessor operatively connected to the magnetic sensor for producing output responses representative of distinguishing characteristics of the coin, a feature extraction circuit for extracting from the output responses of the signal preprocessor signal port…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.