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公开(公告)号：US20240012111A1
公开(公告)日：2024-01-11
申请号：US18471185
申请日：2023-09-20
Applicant: DENSO CORPORATION
Inventor： Noriyuki OZAKI , Mitsuhiro KIYONO , Teiyu KIMURA , Shinji KASHIWADA
Abstract: An optical distance measuring device includes: a light source unit that irradiates a measurement region with irradiation light; a light receiving unit that has a light receiving surface including a plurality of light receiving elements capable of receiving reflected light from a range including the measurement region corresponding to irradiation with the irradiation light and outputs a signal corresponding to a light receiving state of the reflected light for each of the light receiving elements; and a measurement unit that measures a distance to an object in the measurement region by using the signal outputted from the light receiving unit. The light receiving unit has a function of selecting a light receiving element that outputs the signal so that a light receiving position at which the reflected light is received is variable, and the light receiving unit changes the light receiving position to a plurality of positions with respect to a position of the reflected light.
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12.发明申请公开(公告)号：US20220390571A1
公开(公告)日：2022-12-08
申请号：US17820513
申请日：2022-08-17
Applicant: DENSO CORPORATION
Inventor： Mariko SETO , Kenichi YANAI , Mitsuhiro KIYONO , Noriyuki OZAKI
IPC: G01S7/481 , G01S17/10 , G01S17/89 , G01S17/931
Abstract: An object detection apparatus that scans a detection range to detect an object is provided. The object detection apparatus includes a light emission unit that emits a pulse detection light; and a light reception unit having a plurality of light reception pixel groups, in which the plurality of light reception pixel groups include a reflected light reception pixel group that receives, at each scanning unit in a scanning operation, reflected light in response to an emission of the pulse detection light, and one or more visible light reception pixel groups corresponding to visible light components, receiving a visible light at each scanning unit in a scanning operation.
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公开(公告)号：US20220299614A1
公开(公告)日：2022-09-22
申请号：US17806355
申请日：2022-06-10
Applicant: DENSO CORPORATION
Inventor： Noriyuki OZAKI , Yoshihide TACHINO , Takehiro HATA
IPC: G01S7/487 , G01S17/10 , G01S17/894
Abstract: An object detection apparatus includes: a light emission part; a light reception part; a time determination part that determines an environmental light acquisition time during which to acquire environmental light in accordance with the intensity of the environmental light; a light reception control part that controls an operation of receiving incident light by the light reception part; and a light emission control part that controls a light emission operation by the light emission part. The light reception control part causes the light reception part to execute a light reception operation by which to acquire the environmental light during the determined environmental light acquisition time.
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公开(公告)号：US20200044098A1
公开(公告)日：2020-02-06
申请号：US16583674
申请日：2019-09-26
Applicant: DENSO CORPORATION
Inventor： Kenta AZUMA , Teiyu KIMURA , Noriyuki OZAKI , Shinji KASHIWADA , Takehiro HATA , Isamu TAKAI , Hiroyuki MATSUBARA
Abstract: A light detector is provided to include a detection module, and a monitoring SPAD. The detection module includes an SPAD that is an avalanche photodiode operable in Geiger mode; the detection module is configured to perform light detection by applying, to the SPAD, a reverse bias voltage in a reverse direction. The monitoring SPAD has characteristics identical to characteristics of the SPAD in the detection module. The reverse bias voltage is generated to be applied to the SPAD in the detection module based on (i) a reference breakdown voltage set from a breakdown voltage generated across the monitoring SPAD in Geiger mode and (ii) a predetermined excess voltage.
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公开(公告)号：US20200018831A1
公开(公告)日：2020-01-16
申请号：US16582290
申请日：2019-09-25
Applicant: DENSO CORPORATION
Inventor： Kenta AZUMA , Noriyuki OZAKI , Shinji KASHIWADA , Teiyu KIMURA , Isamu TAKAI , Hiroyuki MATSUBARA
IPC: G01S7/486 , H01L31/107
Abstract: A light detector is provided to include a light receiving array having a plurality of light receivers respectively outputting pulse signals upon incidence of photons. A delay setting value is set which is used to adjust a time interval from when the pulse signals are output from the light receiving array to when a response number, which is a specified number of the light receivers outputting the pulse signals, is acquired.
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Patent Agency Ranking
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：US20230012091A1
公开(公告)日：2023-01-12
申请号：US17934082
申请日：2022-09-21
Applicant: DENSO CORPORATION
Inventor： Noriyuki OZAKI , Yoshihiro MURAKAMI , Takehiro HATA , Yoshiaki HOASHI , Masato NAKAJIMA
IPC: G01S7/4865 , G01S7/484 , G01S17/10
Abstract: A rangefinder includes a light emitting part, a light receiving part, a calculating part that calculates the distance from a reflective object, and a control part. The calculating part has a received light intensity determining part, a peak detecting part, and a distance calculating part, and a distance determining part. The control part controls at least one of the intensity of the pulsed light, the sensitivity of the light receiving part to received light, and a position of the region of interest so that a first received light intensity is obtained as the received light intensity of each of the plurality of times of flight at least once, and a second received light intensity having a higher S/N ratio is obtained as the received light intensity of each of the plurality of times of flight at least once. The distance determining part determines the measurement target distance by using the first distance based on the first received light intensity and the second distance based on the second received light intensity.
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18.发明申请公开(公告)号：US20220003853A1
公开(公告)日：2022-01-06
申请号：US17478731
申请日：2021-09-17
Applicant: DENSO CORPORATION
Inventor： Noriyuki OZAKI , Masato RINNAI , Takehiro HATA
Abstract: A distance measuring device includes a light receiving unit and a light emitting unit. The light receiving unit includes light-receiving regions for receiving incident light and receives the incident light in units of each light-receiving region. The light emitting unit exclusively emits detection light corresponding to each light-receiving region. The distance measuring device further includes a malfunction determining unit that, in response to the light receiving unit receiving the incident light according to the emission of the detection light, performs malfunction determination in the distance measuring device, in accordance with a difference between a property of incident light intensity in a light-receiving subject region and a property of incident light intensity in a light-receiving non-subject region, the light-receiving subject region corresponding to exclusive emission of the detection light and the light-receiving non-subject region failing to correspond to exclusive emission of the detection light, among the light-receiving regions.
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公开(公告)号：US20210373156A1
公开(公告)日：2021-12-02
申请号：US17401014
申请日：2021-08-12
Applicant: DENSO CORPORATION
Inventor： Teiyu KIMURA , Noriyuki OZAKI , Takehiro HATA , Mineki SOGA , Hiroyuki MATSUBARA , Isamu TAKAI
IPC: G01S17/08 , G01S17/931 , G01S7/4861 , G01S7/484
Abstract: An optical distance measuring apparatus comprises a laser diode emitting a light pulse, light receiver including a photon-counting light receiver, distance measurement unit including a signal discriminator and propagation estimator, and threshold determiner. The signal discriminator discriminates the signal component, exceeding a threshold, of the signal as a reflected signal resulting from reflection of the light pulse at a measurement object. The propagation estimator estimates a round-trip propagation time of the light pulse to the measurement object using the signal. The threshold determiner sets a boundary level as the threshold, corresponding to a reference level obtained from the signal when the signal discriminator determines the reflected signal, using the relationship between the reference and the boundary level. The reference level is obtained from the average value of a noise probability distribution in the signal. The boundary level represents a predetermined cumulative probability in the noise probability distribution.
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公开(公告)号：US20210181308A1
公开(公告)日：2021-06-17
申请号：US17169238
申请日：2021-02-05
Applicant: DENSO CORPORATION
Inventor： Noriyuki OZAKI , Mitsuhiro KIYONO , Teiyu KIMURA , Shinji KASHIWADA
Abstract: An optical distance measuring device includes: a light source unit that irradiates a measurement region with irradiation light; a light receiving unit that has a light receiving surface including a plurality of light receiving elements capable of receiving reflected light from a range including the measurement region corresponding to irradiation with the irradiation light and outputs a signal corresponding to a light receiving state of the reflected light for each of the light receiving elements; and a measurement unit that measures a distance to an object in the measurement region by using the signal outputted from the light receiving unit. The light receiving unit has a function of selecting a light receiving element that outputs the signal so that a light receiving position at which the reflected light is received is variable, and the light receiving unit changes the light receiving position to a plurality of positions with respect to a position of the reflected light.
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