公开(公告)号：US20170336498A1

公开(公告)日：2017-11-23

申请号：US15597447

申请日：2017-05-17

申请人： DENSO WAVE INCORPORATED

发明人： Kunihiko ITO ,  Gaku TAKANO ,  Wataru KOBORI ,  Tetsuya IWASAKI ,  Keiji MATSUMOTO

IPC分类号： G01S7/493 ,  G01S7/481 ,  G01S17/08 ,  G01S17/89

CPC分类号： G01S7/493 ,  G01S7/4817 ,  G01S7/487 ,  G01S17/08 ,  G01S17/42 ,  G01S17/50 ,  G01S17/89

摘要： An arithmetic processor is provided to detect a background even when observed data values vary. The processor includes a background candidate data memory 20 storing data as a background candidate. In the data, an observation count, as the number of times of obtaining the same observation data, is correlated with distance data representing the observed data. The processor also includes a ranking section 11 ranking background candidates using the observation count as a basis; an observation count update section 12 comparing observed data with a background candidate stored in the memory 20 to find a match, counting observations of the background candidate if there is a match, and replacing distance data of a lowest-ranked background candidate with the observed data if there is no match; and a background determination section 13 determining there are two backgrounds if the top two background candidates remain unchanged for a predetermined period.

公开(公告)号：US20170293030A1

公开(公告)日：2017-10-12

申请号：US15481795

申请日：2017-04-07

申请人： DENSO WAVE INCORPORATED

发明人： Shoji KATSURA ,  Gaku TAKANO ,  Wataru KOBORI ,  Tetsuya IWASAKI

IPC分类号： G01S17/02 ,  G01S17/42 ,  G01S7/41 ,  G01S17/50 ,  G01S17/87 ,  G01S13/56 ,  G01S17/08 ,  G01S17/46

CPC分类号： G01S17/026 ,  G01S7/415 ,  G01S7/4806 ,  G01S13/56 ,  G01S17/08 ,  G01S17/42 ,  G01S17/46 ,  G01S17/50 ,  G01S17/87

摘要： An object detection apparatus measures a distance to a detected object at each irradiation angle, based on reflected waves of electromagnetic waves irradiated from a laser light irradiating unit at each irradiation angle. The apparatus determines whether the measured distance remains unchanged for prescribed period of time, for each irradiation angle, and stores the determined distance in a storage unit as a stationary object distance in association with the irradiation angle. The apparatus compares the current measured distance and the stored distances, and determines whether a stationary object distance matching the current distance is present among the stored distances. The apparatus initially compares the shortest stationary object distance among the stored distances with the current distance, and upon determining that a stationary object distance matching the current distance is present, stops the comparison of the current distance and the stored distances that have not been compared with the current distance.