公开(公告)号：US12078758B2

公开(公告)日：2024-09-03

申请号：US17190837

申请日：2021-03-03

申请人： DENSO CORPORATION

发明人： Hikaru Sasaki

IPC分类号： G01S7/48 ,  G01S7/481 ,  G01S7/4913 ,  G01S7/4915 ,  G01S7/497 ,  G01S17/06

CPC分类号： G01S7/4817 ,  G01S7/4913 ,  G01S7/4915 ,  G01S7/4972 ,  G01S17/06

摘要： A signal receiver unit includes a first receiver unit which is designed to receive reflected electromagnetic waves created by a main lobe and two grating lobes of projected electromagnetic wave. The signal receiver unit includes a second receiver unit which is designed to receive reflected electromagnetic waves created by the main lobe and one grating lobe of the projected electromagnetic wave. The signal receiver unit includes a third receiver unit which is designed to receive reflected electromagnetic waves created by the main lobe and the other grating lobe of the projected electromagnetic wave. The signal processor unit identifies the reflected electromagnetic waves based on combinations of the received signals of the first receiver unit, the second receiver unit, and the third receiver unit, and calculates a distance to an object.

公开(公告)号：US11353573B2

公开(公告)日：2022-06-07

申请号：US16832457

申请日：2020-03-27

申请人： DENSO CORPORATION

发明人： Hikaru Sasaki

IPC分类号： G01S13/42 ,  G01S13/44 ,  G01S7/03

摘要： In a ranging module, a first calculator calculates a distance from a processed signal corresponding to a current pixel. A determiner determines whether the distance calculated by the first calculator differs from a preset limit distance. A re-extractor is configured to, in response to the determiner determining that the distance differs from the preset limit distance, extract pieces of data of processing sections each corresponding to a sweep time of a transmission wave from a time-series of the processed signals saved in a data storage corresponding from a pixel previous to the current pixel in a scanning direction of a scanner to the current pixel while shifting the processing sections one after the other by a time period shorter than the sweep time. A second calculator calculates the distance from the data of each processing section extracted by the re-extractor.

公开(公告)号：US10421099B2

公开(公告)日：2019-09-24

申请号：US15561535

申请日：2016-05-25

申请人： DENSO CORPORATION

发明人： Shohei Morikawa ,  Hikaru Sasaki

IPC分类号： B06B1/06 ,  G02B26/08 ,  G02B26/10 ,  B81B3/00

摘要： A control circuit includes: an angular velocity calculator calculating an angular velocity of a mirror based on an angle of the mirror; a target angular velocity calculator calculating a target value of the angular velocity; a resonance frequency detector detecting a frequency of vibration of the mirror using the angular velocity and target value; a drive waveform generator generating a drive signal having sawtooth waveform; and an unnecessary vibration controller optimizing the drive signal to reduce an unnecessary vibration of the mirror based on the frequency of vibration of the mirror and providing piezoelectric elements with voltage according to the optimized drive signal. The resonance frequency detector detects the frequency of vibration of the mirror using a waveform and the target value of the angular velocity of the mirror during a duration in which the drive signal is transmitted to the unnecessary vibration controller from the drive waveform generator.