Distance sensor for projectile fuzes
US5751239A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 10, 1984 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | May 10, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42C13/023
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The distance sensor for projectile fuzes, according to the invention, employs a range finder (6', 17, 25, 27) operating on the principle of pulse propagation time. The signal (18) is radiated by an antenna (4, 5') and the portion (18') reflected by the target is also received thereby. From a pulse (17') derived from the transmitter pulse and delayed in time by a definite amount in the delay member (19), one obtains the receiver sampling pulse (20). This pulse is used to sample the portion (18') and the resulting low-frequency representation of the receiver pulse is passed through a low-frequency amplifier (21) and a band-pass filter (44). If the frequency components of the transmitter pulse (18) are made as low as possible and the signal portions (18') reflected at the target are received only from a narrowly limited range of distances, then this method makes it possible to distinguish metal targets from non-metal targets as well as to distinguish targets of a given size from smaller targets with the aid of a simple amplitude threshold device (FIG. 1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.