Method of measuring the velocity of an object relative to a reference and a device for effecting said method
US4041293A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 23, 1975 |
| Grant date | Aug 9, 1977 |
| Priority date | — |
| Expiry date | Sep 23, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/605
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method and apparatus for measuring the velocity of an object relative to a reference by means of signals that are transmitted and received by transmitters and receivers fixed to the object at a certain geometric distance from each other in the direction of measurement, signals being transmitted by the object and being reflected by the reference. The receivers set up signals which correspond to the auto-correlation and cross-correlation of the received signals, the correlation signals being functions of the transmitter-receiver system geometry and being substantially independent of the reflection properties of the reference. The auto-correlation and cross-correlation signals are operated on to determine a time shift therebetween which is a function of the displacement of the object over a given period of time, the velocity of the object relative to the reference location being determined from said time shift.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.