Method and apparatus for calibrating a positioning system
US4638232A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1985 |
| Grant date | Jan 20, 1987 |
| Priority date | — |
| Expiry date | Aug 30, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/41206
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The invention relates to a method and an apparatus for calibrating a positioning system including a control computer (1405) for producing command value signals to a positioning apparatus which positions an object against a work surface. Sensors (1406,1407) detect the location of the positioning system and convert it to an actual value signal which can be fed back to the control computer. A calibration plane (601) placed on the work surface contains a number of calibration points (602,603), the command value positions of which are entered into the control computer. The positions of at least some calibration points are sensed by a calibration probe (605) corresponding to the object and the actual values for the positions of said points are compared with the command values for the positions of these points on the work surface entered into the control computer. The differences obtained between the actual values and the command values for the positions of the calibration points are stored in the control computer and are used for compensation of the errors of the positioning system by interpolation. The calibration plane preferably consists of a calibration board of electrically insulati…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.