Measuring apparatus
US4523380A · kind A · utility
Inventor
Key dates
| Filing date | Aug 19, 1983 |
| Grant date | Jun 18, 1985 |
| Priority date | — |
| Expiry date | Aug 19, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B5/008
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Measuring apparatus for determining the position of a point in a measuring volume relative to a datum point at which three mutually perpendicular axes intersect, includes a probe member supported for movement within that volume. Errors due to rotations about the various axes are corrected by providing additional transducers on each axis, there being (n+1) transducers where n is the number of rotations for which correction is required. The embodiments described have three X-axis transducers X.sub.1, X.sub.2 and X.sub.3 and three Y-axis transducers Y.sub.1, Y.sub.2 and Y.sub.3 which, with the appropriate circuitry correct for pitch and yaw errors about the two axes. For the Z-axis only two transducers, Z.sub.1 and Z.sub.2, are required. The circuit means combines the various transducer outputs to derive corrected values of the three co-ordinates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.