Radar device
US7602477B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2005 |
| Grant date | Oct 13, 2009 |
| Priority date | — |
| Expiry date | Jun 5, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2007/4975
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A laser radar sensor includes a light emitting circuit, a light receiving circuit, an object detection circuit, and a CPU. The object detection circuit has a summation block, a noise reference determination block, a noise reference storing block, and a differentiation block. The summation block sums up photoreception signals outputted from a photoreceptor also included in the radar sensor and produces a summation signal. The noise reference determination block determines the summation signal outputted in a condition that no object is present in a detection area as a noise reference signal. The noise reference storing block stores the noise reference signal. The differentiation block calculates a subtraction signal by subtracting the noise reference signal from the summation signal for removing a noise component from the summation signal. Object detection is performed based on the subtraction signal. With this configuration, an object is properly detected even when a protection cover of the radar sensor has a dirty spot on its surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.