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公开(公告)号：US20220221565A1
公开(公告)日：2022-07-14
申请号：US17657667
申请日：2022-04-01
Applicant: DENSO CORPORATION
Inventor： Noriyuki OZAKI , Takehiro HATA , Akifumi UENO
Abstract: A distance measuring apparatus includes a light emitter, a receiver, a calculator, a case having a window, and a determiner for determining that dirt is adhered to the window in response to determination that a dirt determination condition is satisfied. The dirt determination condition includes a first condition that a specified light intensity level at a specified value of a time of flight for at least one pixel of a view region in a histogram is larger than or equal to at least one value of an intensity threshold calculated for the at least one pixel of the view region.
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公开(公告)号：US20240353564A1
公开(公告)日：2024-10-24
申请号：US18740309
申请日：2024-06-11
Applicant: DENSO CORPORATION
Inventor： Takayoshi FUJISAWA , Akifumi UENO , Noriyuki OZAKI
IPC: G01S17/931 , G01S7/4861 , G01S7/487 , G01S17/10
CPC classification number: G01S17/931 , G01S7/4861 , G01S7/487 , G01S17/10
Abstract: In a ranging device, a characteristic setting unit is configured to extract, from one or more pieces of received-light information representing changes with time in amount of received light acquired by the light receiving unit, at least one of a received-light amount range and a light reception time range of pulsed light other than emitted light from the light emitting unit, as a specified range. A received-light integration unit is configured to generate integrated received-light information by integrating the received-light information on a time axis with emission timings matched over a plurality of light receptions. A distance calculation unit is configured to exclude or identify distance noise formed of pulsed waveforms arising from pulsed light other than the emitted light, using the specified range extracted by the characteristic setting unit, and calculate a distance to the object reflecting the emitted light.
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公开(公告)号：US20210382177A1
公开(公告)日：2021-12-09
申请号：US17406588
申请日：2021-08-19
Applicant: DENSO CORPORATION
Inventor： Toshiaki NAGAI , Teiyu KIMURA , Fumiaki MIZUNO , Akifumi UENO
IPC: G01S17/931 , G01S17/08 , G06K9/00
Abstract: In a system for monitoring surroundings of a vehicle, an optical ranging device including a light emitting unit, a light receiving unit configured to receive reflected light from a measurement region, toward which the illumination light from the light emitting unit is projected, and a measurement unit configured to measure a distance to an object within the measurement region using a signal corresponding to a state of the reflected light, output from the light receiving unit. A shape of the measurement region as the illumination light is projected along a horizontal direction onto a cylindrical plane along a vertical direction, surrounding the optical ranging device, is a narrow-at-end shape. The optical ranging device and another optical ranging device are arranged on the vehicle such that the illumination light from the optical ranging device has a larger depression angle than illumination light from the other optical ranging device.
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公开(公告)号：US20190265333A1
公开(公告)日：2019-08-29
申请号：US16282756
申请日：2019-02-22
Applicant: DENSO CORPORATION
Inventor： Akifumi UENO , Isamu TAKAI
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.
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公开(公告)号：US20220268897A1
公开(公告)日：2022-08-25
申请号：US17663091
申请日：2022-05-12
Applicant: DENSO CORPORATION
Inventor： Akifumi UENO , Fumiaki MIZUNO , Yoshiaki HOASHI
Abstract: A distance measuring device includes a deflecting mirror configured to reflect transmission waves, and a swing motor configured to swing the deflecting mirror round a swing shaft so that scanning with the transmission waves is performed within a predetermined scanning region. The swing motor is configured to swing the deflecting mirror within a range of a predetermined rotation angle from a reference position, which is a rotational position of the deflecting mirror that reflects the transmission waves in a direction to a substantial center of the scanning region. The deflecting mirror is configured to return to the reference position when a distance measuring process, in which scanning with the transmission waves is repeated, ends.
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Patent Agency Ranking
公开(公告)号：US20220268896A1
公开(公告)日：2022-08-25
申请号：US17653098
申请日：2022-03-01
Applicant: DENSO CORPORATION
Inventor： Akifumi UENO , Teiyuu KIMURA , Fumiaki MIZUNO
Abstract: An optical distance measurement apparatus includes a casing, a light emitting unit, a mirror, a rotating unit, a light receiving unit, a window portion, and a reference angle marker. The light emitting unit emits laser light. The mirror is arranged inside the casing and reflects the laser light that is emitted from the light emitting unit. The rotating unit rotates the mirror. The light receiving unit includes a light receiving element for receiving incident light. The window portion is provided in the casing and is for emitting the laser light that is reflected by the mirror outside the casing. The reference angle marker is provided in at least either of the casing and the window portion, and is detected by the light receiving unit based on a rotation angle of the mirror being a reference rotation angle that is prescribed in advance.
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公开(公告)号：US20220187429A1
公开(公告)日：2022-06-16
申请号：US17653278
申请日：2022-03-02
Applicant: DENSO CORPORATION
Inventor： Akifumi UENO , Shinji KASHIWADA , Fumiaki MIZUNO
Abstract: An optical ranging device comprises: a light emitting portion emitting laser light; a scanning portion performing a scan using the laser light emitted from the light emitting portion; a light receiving portion receiving incident light; a rotation angle sensor detecting a rotation angle of the scanning portion; and a control device configured to: acquire the rotation angle and output a drive signal to the light emitting portion, and use a correction value determined using at least an emission delay period from when the rotation angle is acquired to when the laser light is emitted, to perform at least one of a first correction control of an emission timing of the laser light and a second correction control of a detection angle of distance data generated using a received light signal output from the light receiving portion that received the laser light.
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公开(公告)号：US20220187470A1
公开(公告)日：2022-06-16
申请号：US17653528
申请日：2022-03-04
Applicant: DENSO CORPORATION
Inventor： Takayoshi FUJISAWA , Akifumi UENO , Noriyuki OZAKI
IPC: G01S17/931 , G01S17/10 , G01S7/4861 , G01S7/487
Abstract: In a ranging device, a characteristic setting unit is configured to extract, from one or more pieces of received-light information representing changes with time in amount of received light acquired by the light receiving unit, at least one of a received-light amount range and a light reception time range of pulsed light other than emitted light from the light emitting unit, as a specified range. A received-light integration unit is configured to generate integrated received-light information by integrating the received-light information on a time axis with emission timings matched over a plurality of light receptions. A distance calculation unit is configured to exclude or identify distance noise formed of pulsed waveforms arising from pulsed light other than the emitted light, using the specified range extracted by the characteristic setting unit, and calculate a distance to the object reflecting the emitted light.
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公开(公告)号：US20210239840A1
公开(公告)日：2021-08-05
申请号：US16778781
申请日：2020-01-31
Applicant: DENSO CORPORATION
Inventor： Teiyuu KIMURA , Noriyuki OZAKI , Akifumi UENO
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.
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公开(公告)号：US20180372538A1
公开(公告)日：2018-12-27
申请号：US16013047
申请日：2018-06-20
Applicant: DENSO CORPORATION
Inventor： Takehiro HATA , Shinji KASHIWADA , Akifumi UENO
IPC: G01J1/44 , H03K5/1534
Abstract: A light detection device has light receiving parts, edge detection circuits and an addition unit. Each light receiving part has a quench resistance, a SPAD and a pulse signal output part. The SPAD responses incident photons, i.e. incident light. The quench resistance and pulse signal output part generate and transmit a pulse signal to a corresponding edge detection circuit when the SPAD receives and responds to the incident light. The edge detection circuits and the addition unit detects the number of edges during a period from a previously received CLK signal to a currently received CLK signal every time it receives a CLK signal transmitted at a predetermined period. The edge represents a state change from a first state which receives no pulse signal to a second state which receives the pulse signal.
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