Patent ID: 7242461
Filing Date: 2007-07-10
Classification: G01S

Abstract:
1. A radar system of a vehicle, the radar system having a light emitter for repeatedly emitting laser light so that the laser light is emitted over a predetermined angular range at least along width direction of the vehicle in each light emission, and a photoreceptor for outputting light reception signals, which are output from photoreceptive elements in accordance with intensity of reflected laser light reflected by a reflection object, the photoreceptive elements being arranged at least along the width direction of the vehicle, the radar system comprising: an integrator having, for each photoreceptive element, a plurality of switches for switching connection with the photoreceptor, and a plurality of capacitors respectively connected to the switches for accumulating electric charges corresponding to intensity of the light reception signals; a controller for switching the switches to a connected state one after another in a predetermined order at a predetermined time interval until a predetermined time passes after every emission of the laser light, while keeping the switch, which is not switched to the connected state, at a disconnected state, wherein the controller switches the switches to the connected state one after another in a predetermined order at a predetermined time interval if the laser light is emitted predetermined times, in order to make the integrator output integration signals corresponding to the electric charges accumulated in the capacitors; and a sensor for comparing the integration signals, that correspond to the respective photoreceptive elements and output by the integrator, with a predetermined integration standard value, and for sensing the reflection object based on the integration signals equal to or greater than the integration standard value.