Roll angle determination
US5163637A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 18, 1991 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Apr 18, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF41G7/305
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for determining the roll angle position of a rotating projectile, with the aid of polarized electromagnetic radiation, comprises a transmitter for emitting a position-determining polarized radiation in the direction towards the projectile and a receiver arranged in the projectile for receiving the transmitted radiation. The emitted radiation consists of two components, a first component in the long-wave (LF) band and a second component in the microwave band. The microwave component comprises a pulse train in which the pulses are intended to indicate when the long-wave component is situated in a certain phase position, for example, to indicate the sinusoidal long-wave component's zero cross-overs with a positive-going derivative. This takes place in such a way that a synchronizing pulse is emitted by the long-wave transmitter to the microwave transmitter which transmits a short series of microwave pulses as an indication to the projectile.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.