Automatic surveying apparatus using a laser beam
US4671654A · kind A · utility
13Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 21, 1984 |
| Grant date | Jun 9, 1987 |
| Priority date | — |
| Expiry date | May 21, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/86
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An automatic surveying apparatus for surveying a route in tunneling work, for example, by directing a laser beam from a laser device onto a screen of a moving target to form a laser spot on the screen and detecting the positional coordinates of the laser spot on the screen by means of an image pick-up camera to obtain the positional deviation of the target with high accuracy. The angular deflections of the target can also be measured by use of a target composed of two screens and two image pick-up cameras.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.