Method and apparatus for determining the coordinates of a point on a surface
US4571577A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1983 |
| Grant date | Feb 18, 1986 |
| Priority date | — |
| Expiry date | Jan 25, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/004
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A screen is disclosed on the surface of which a certain number of resistant conducting emitter strips and insulated conducting receiver strips are laid, the emitter strips being parallel-mounted with the terminals of a voltage generator and the receiver strips being interlaid between the receiver strips such that a conducting receiver strip lies between two resistant emitter strips. The electronics of control comprises an exploring stage to control the receiver strip time-related exploration. Thus, when a sufficiently conducting object used to indicate a point, has touched the surface and bridges an emitter strip and a receiver strip, a higher potential is detected on the corresponding receiver strip and the ordinate Y is given by the strip order number--while the abscissa X is calculated from measuring the potential between each ends of the emitter strip and the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.