Radar device

Details Radar device Radar device

2005-03-09

2009-10-13

Alsomiri, Isam (Department: 3662)

Optics: measuring and testing

Range or remote distance finding

With photodetection

C356S004010, C356S005150, C342S027000, C342S070000

Reexamination Certificate

active

07602477

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.

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