Induced vibration dynamic touch sensor system and method
US4748672A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1985 |
| Grant date | May 31, 1988 |
| Priority date | — |
| Expiry date | Apr 16, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V20/64
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An induced vibration dynamic touch sensor comprises a compliant membrane adapted for sliding contact with an object so as to induce vibrations in the membrane, and a transducer assembly for converting the vibrations into electrical signals. The electrical signals are processed to produce a normalized spectral signature characteristic of the size and shape of the object, and the sizes and shapes and nature of its surface features. A pattern vector is extracted from the spectral signature and subjected to discriminant analysis to classify and recognize the object. The invention is capable of discriminating between objects differing in diameter by as little as 1/32 inches and differing in spacing by as little as 0.01 inches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.