Patent ID: 9274211
Filing Date: 2016-03-01
CPC Classification: G01S

Claim Text:
1. A target object detection device, comprising: a transmitter for transmitting at least one transmission wave in a predetermined azimuth from a transmission source thereof at a predetermined cycle; an echo signal receiver for receiving echo signals of the transmission waves from one or more target objects at the cycle; an echo signal suppressor for suppressing levels of the echo signals corresponding to sampling positions every time the echo signals are received at the cycle, by using setting of amplitude level suppression values of the echo signals based on thresholds for the sampling positions that are set in association with distances from the transmission source; a target object detector for detecting the one or more target objects based on the level-suppressed echo signals; a first updater for comparing one or more amplitude levels of echo signals of sampling positions within a first area corresponding to a first distance from the transmission source, with the threshold that is set in association with the first distance, and determining to update the values with a new threshold and a new suppression value for each sampling position corresponding to the first distance based on the comparison result; and a second updater for comparing one or more amplitude levels of echo signals of sampling positions corresponding to a second distance that is farther than the first distance from the transmission source, with the threshold that is set in association with the second distance, and determining to update the values with a new threshold and a new suppression value for each sampling position located farther than the first distance based on the comparison result and a relation with the threshold for each sampling position located farther than the first area.