Wide-angle, static and positional anticipatory object detection system
US6225891A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2000 |
| Grant date | May 1, 2001 |
| Priority date | — |
| Expiry date | Jan 7, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2013/93275
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A wide angle, static, positional anticipatory object detection system includes a transducer device for transmitting a modulated carrier signal and receiving the modulated carrier signal reflected from an object, a detection device for detecting a plurality of Doppler shifted harmonic components from the reflected modulated carrier signal, a range determining device responsive to the amplitudes of at least two of the harmonic components being equal for determining the instantaneous range of the object and, a predetermined distance thereafter, to a predetermined difference between the amplitudes of at least two of the harmonic components. The system also includes a Doppler period measurement device responsive to at least one of the harmonic components for measuring the Doppler periods of that harmonic component and a collision decision device, responsive to the range determining device and the Doppler period measurement device, for indicating that a collision with the object is imminent and the offset of the collision from the detection device before contact is made.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.