Aircraft ground proximity warning system with speed compensation
US3958218A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 20, 1975 |
| Grant date | May 18, 1976 |
| Priority date | — |
| Expiry date | Aug 20, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D1/0607
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
By using air speed as an input to a ground proximity warning system that includes: a signal representative of the time rate of change of the aircraft altitude with respect to ground; circuitry for limiting the amplitude of this signal; a signal that represents a time rate of change of the aircraft's barometric altitude; and circuitry for combining the amplitude limited signal, representing the time rate of change of the aircraft with respect to ground, with a signal that represents the aircraft's altitude over ground; the effective warning time is extended by increasing the allowable amplitude, of the signal representing rate of change of the aircraft with respect to the ground, in response to the speed of the aircraft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.