公开(公告)号：US12189060B2

公开(公告)日：2025-01-07

申请号：US17138699

申请日：2020-12-30

Applicant: DENSO CORPORATION

Inventor： Hitoshi Yamada ,  Yoshiaki Hoashi ,  Fumiaki Mizuno ,  Noriyuki Ozaki ,  Akifumi Ueno

IPC: G01S7/481 ,  G01S7/484 ,  G02B5/10 ,  G02B26/12 ,  G02B27/30

Abstract: An optical distance measuring device includes a light emitting element in which a plurality of light emitting units 16 that emit light are arranged so that a gap is present between adjacent ones of the light emitting units, a transmission unit through which the light is transmitted, a drive unit that changes a positional relationship between the light emitting element and the transmission unit, and a light receiving unit that receives reflected light of the light. The drive unit changes the positional relationship between the light emitting element and the transmission unit, thereby changing an irradiation path of the light along an arrangement direction.

公开(公告)号：US11953604B2

公开(公告)日：2024-04-09

申请号：US18303688

申请日：2023-04-20

Applicant: DENSO CORPORATION

Inventor： Teiyuu Kimura ,  Noriyuki Ozaki ,  Akifumi Ueno

IPC: G01S17/93 ,  G01C3/08 ,  G01S7/481 ,  G02B26/10

CPC classification number: G01S17/93 ,  G01C3/08 ,  G01S7/481 ,  G02B26/105

Abstract: A LIDAR device for measuring a distance to an object in a scanning zone includes a light source, a light receiver, a rotatable mirror, a motor, an angle sensor, and a controller. The rotatable mirror is configured to reflect the light beam emitted from the light source toward the scanning zone. The motor is configured to rotate the mirror back and forth between a first position and a second position. The angle sensor is configured to detect a rotation angle of the mirror and to output a detection signal indicative of the rotation angle of the mirror at a plurality of predetermined angle intervals during each rotation cycle between the first position and the second position of the mirror. The controller is configured to output a control signal to the light source to emit a light beam upon receiving the detection signal from the angle sensor.

公开(公告)号：US11686843B2

公开(公告)日：2023-06-27

申请号：US16282805

申请日：2019-02-22

Applicant: DENSO CORPORATION

Inventor： Akifumi Ueno ,  Isamu Takai

IPC: G01S17/08 ,  G01S17/89 ,  G01S17/10 ,  G01C3/08 ,  H05B47/11 ,  G01S17/931

CPC classification number: G01S17/10 ,  G01C3/08 ,  G01S17/931 ,  H05B47/11

Abstract: In an apparatus, each of light receiving elements outputs an intensity signal based on a corresponding intensity of return light from a measurement space. The return light includes reflected light reflected based on reflection of the measurement light by a target object. An identifying unit identifies a light receiving area in the light detection region as a function of the intensity signals of the respective light receiving elements. The light receiving area is based on specified light receiving elements in the plurality of light receiving elements. The specified light receiving elements are arranged to receive the reflected light. An estimating unit estimates, based on a geometry of the light receiving area, a state of the apparatus including a state of the optical system.

公开(公告)号：US11668832B2

公开(公告)日：2023-06-06

申请号：US16778781

申请日：2020-01-31

Applicant: DENSO CORPORATION

Inventor： Teiyuu Kimura ,  Noriyuki Ozaki ,  Akifumi Ueno

IPC: G01S17/93 ,  G02B26/10 ,  G01C3/08 ,  G01S7/481

CPC classification number: G01S17/93 ,  G01C3/08 ,  G01S7/481 ,  G02B26/105

Abstract: A LIDAR device for measuring a distance to an object in a scanning zone includes a light source, a light receiver, a rotatable mirror, a motor, an angle sensor, and a controller. The rotatable mirror is configured to reflect the light beam emitted from the light source toward the scanning zone. The motor is configured to rotate the mirror back and forth between a first position and a second position. The angle sensor is configured to detect a rotation angle of the mirror and to output a detection signal indicative of the rotation angle of the mirror at a plurality of predetermined angle intervals during each rotation cycle between the first position and the second position of the mirror. The controller is configured to output a control signal to the light source to emit a light beam upon receiving the detection signal from the angle sensor.

公开(公告)号：US11662442B2

公开(公告)日：2023-05-30

申请号：US16720553

申请日：2019-12-19

Applicant: DENSO CORPORATION

Inventor： Akifumi Ueno ,  Takehiro Hata ,  Shinji Kashiwada

IPC: G01S7/4861 ,  G01S17/08 ,  H01L31/02 ,  G01S7/497 ,  G01S17/89

CPC classification number: G01S7/4861 ,  G01S7/497 ,  G01S17/08 ,  G01S17/89 ,  H01L31/02027

Abstract: An optical distance measurement apparatus that measures a distance using a round-trip time of light to an object includes an irradiator, a plurality of SPADs, a plurality of signal output units, a response number detector, a timing identifier, and a timing corrector. The response number detector detects a response number representing the number of responding one of the SPADs based on a pulse signal. The timing identifier identifies a temporary timing based on a state of variation in the response number along a time series and identifies a detection timing representing a timing when the optical distance measurement apparatus detects light in accordance with the temporary timing. The timing corrector acquires a correction time representing a time difference between the temporary timing and a true timing corresponding to a distance to an object and sets a timing corrected from the temporary timing by the correction time as the detection timing.

公开(公告)号：US11609308B2

公开(公告)日：2023-03-21

申请号：US16282756

申请日：2019-02-22

Applicant: DENSO CORPORATION

Inventor： Akifumi Ueno ,  Isamu Takai

IPC: G01S7/48 ,  G01S17/08 ,  G01S17/931 ,  G01S17/10

Abstract: In an apparatus, each of light receiving elements outputs an intensity signal based on a corresponding intensity of return light from a measurement space. The return light includes reflected light reflected based on reflection of the measurement light by a target object. An identifying unit identifies a light receiving area in the light detection region as a function of the intensity signals of the respective light receiving elements. The light receiving area is based on specified light receiving elements in the plurality of light receiving elements. The specified light receiving elements are arranged to receive the reflected light. A distance measuring unit measures the distance of the target object in accordance with the intensity signals received by the specified light receiving elements.