System for measuring position and/or velocity
US4195425A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1978 |
| Grant date | Apr 1, 1980 |
| Priority date | — |
| Expiry date | Jan 4, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P3/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
System for measuring the relative position and/or velocity of two objects with respect to each other and/or with respect to a common reference system, such as the ground, according to the magnitude and direction thereof, using electro-optical measuring means, the improvement comprising: PA1 (1) producing images of the object to be measured in at least two different spatial positions; PA1 (2) producing A.C. electrical signals of different frequency proportional to the relative movements of these images to at least one optical correlation system; and PA1 (3) evaluating these signals, with the use of the trigonometrical relationships of the perspective imaging, in a computer to determine the measured values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.