Radar device
US7576838B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 27, 2007 |
| Grant date | Aug 18, 2009 |
| Priority date | — |
| Expiry date | Aug 3, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/4091
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A radar device has a wave projecting part for projecting pulsed electromagnetic waves to a target object in a specified direction at specified time intervals, a wave receiving part for receiving reflected waves reflected by the target object, an intensity measuring part for measuring the intensity of the reflected waves, a distance measuring part for measuring the distance to the target object based on elapsed time from when the pulsed electromagnetic waves are projected until when the reflected waves are received and also serving to determine a maximum reflection point at which the intensity of the received reflected waves is the largest, and a scanning part for varying the direction of the projected electromagnetic waves and the received reflected waves in horizontal and vertical directions respectively within a specified angular scan range. A calculating part calculates a relative speed of the target object based on the measured distance and the elapsed time and a displacement quantity between the vertical scan direction of the maximum reflection point and a vertical reference direction of the scan range by determining a time constant of a filtering calculation based on the dist…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.