Radiation monitoring of an object space with a clutter suppression technique
US3952280A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 10, 1974 |
| Grant date | Apr 20, 1976 |
| Priority date | — |
| Expiry date | Jan 10, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/905
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A technique for monitoring an object space having known cluttering objects for determining when an object of interest enters the object space. An application of the technique is in sonar supervision of a river or other body of water wherein the entrance into the monitored space by the object of interest, such as a shark or swimmer, is readily detected. Such detection is accomplished by illuminating a monitored object space with broad band radiation. Radiation either reflected from or transmitted through the object is then converted to an electrical signal that is passed through a bank of bandpass filters. The filter outputs are weighted to maximize the receiver's response to the object of interest while minimizing the response to clutter and noise. The technique is based upon the observation that different reflectors give rise to different echo spectra when the reflectors are illuminated with a broad band signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.