Distance measurement method and apparatus, and relative position measurement apparatus
US5128961A · kind A · utility
16Cited by
6References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 26, 1990 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | Nov 26, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A distance measurement apparatus receives pseudo noise reflected from a target object. The apparatus then obtains a cross-correlation value from cross-correlation of the received pseudo noise with pseudo noise which has been convoluted with expected measurement values. The apparatus measures a distance to the target object based upon the cross-correlation value. Also, a relative position measurement apparatus measures distances to an operator from plural points on the apparatus and then measures a relative position of the operator with respect to the apparatus based upon the plural distances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.