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11.发明授权公开(公告)号：US12013459B2
公开(公告)日：2024-06-18
申请号：US16981587
申请日：2019-03-06
Inventor： Shigeru Saitou , Motonori Ishii , Masato Takemoto , Shinzo Koyama
CPC classification number: G01S17/10 , G01S7/4816 , G01S7/4868 , G01S17/18 , G01S17/89 , G01S7/4873
Abstract: A distance measuring device is to be connected to a wave transmitter and a wave receiver. The distance measuring device includes a distance measuring unit, which calculates a distance to the target based on a time interval between transmission of a measuring wave from a wave transmitter and reception of the measuring wave at a wave receiver. The target may be present across a preceding distance range and a succeeding distance range which are continuous with each other and both of which belong to a plurality of distance ranges defined by dividing a measurable distance range. In such a situation, the distance measuring unit calculates the distance to the target based on respective amounts of a preceding wave received at the wave receiver over a period corresponding to the preceding distance range and a succeeding wave received at the wave receiver over a period corresponding to the succeeding distance range.
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12.发明授权公开(公告)号：US12007478B2
公开(公告)日：2024-06-11
申请号：US16982405
申请日：2019-03-14
Inventor： Hiroshi Koshida , Shinzo Koyama , Motonori Ishii , Shigetaka Kasuga
IPC: G01C3/08 , G01S7/481 , G01S7/4865 , G01S17/10 , G01S17/89
CPC classification number: G01S17/10 , G01S7/4816 , G01S7/4865 , G01S17/89
Abstract: A distance measuring device is to be connected to a wave transmission module to transmit a measuring wave and a wave reception module including a first wave receiver and a second wave receiver, both of which receive the measuring wave reflected from a target. In this distance measuring device, a first wave reception period in which the first wave receiver receives the measuring wave and a second wave reception period in which the second wave receiver receives the measuring wave overlap with each other on a time axis. In addition, in this distance measuring device, a time lag is provided between respective beginning times of the first and second wave reception periods. The time lag is shorter than either the first wave reception period or the second wave reception period.
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公开(公告)号：US11657526B2
公开(公告)日：2023-05-23
申请号：US17171907
申请日：2021-02-09
Inventor： Shigeru Saitou , Akihiro Odagawa , Shinzo Koyama , Masato Takemoto
CPC classification number: G06T7/586 , G01S7/4816 , G01S17/08 , G06T2207/10144 , G06T2207/10152 , G06T2207/30252
Abstract: A distance measurement device includes: a light source configured to emit visible illumination light; an imaging element configured to receive reflected light of the illumination light from an object; and a signal processing circuit configured to reduce the emission of the illumination light in a predetermined period, detect a timing when the reception of the reflected light at the imaging element is reduced due to the reduction of the illumination light, and measure a distance to the object on the basis of the detected timing.
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14.发明授权公开(公告)号：US11243310B2
公开(公告)日：2022-02-08
申请号：US17029601
申请日：2020-09-23
Inventor： Motonori Ishii , Masato Takemoto , Shigeru Saitou , Shinzo Koyama
IPC: G01S17/89 , G01S7/4865 , H04N5/30 , H04N5/00 , H04N5/353 , H04N5/3745
Abstract: Each of column signal lines is connected to two or more of P pixels belonging to one of Q pixel columns of pixels. In each of the pixels, a first switch switches connection and disconnection between a light receiver and a first charge storage. A second switch switches connection and disconnection between the first charge storage and a second charge storage. A third switch switches connection and disconnection between the first charge storage and one of column signal lines corresponding to the pixel. The fourth switch switches the connection and disconnection between the second charge storage and the one of the column signal lines corresponding to the pixel.
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公开(公告)号：US11204421B2
公开(公告)日：2021-12-21
申请号：US16040624
申请日：2018-07-20
Inventor： Akito Inoue , Masato Takemoto , Shinzo Koyama , Motonori Ishii , Shigeru Saitou
IPC: G01S17/14 , G01S7/487 , G01S17/10 , G01S17/36 , G01S7/4865 , G01S17/04 , G01S17/18 , G01S17/86 , G01S17/894 , G01S7/4863 , G01S7/497
Abstract: A distance measuring device includes a controller and a distance calculator. The controller sets, in a first time period, a first measurement time range corresponding to a first measurement distance range; causes a light emitter to emit light and places a light receiver into an exposure state, in the first measurement time range; sets, in a second time period, a second measurement time range corresponding to a second measurement distance range; and causes the light emitter to emit light and places the light receiver into an exposure state, in the second measurement time range. At least one measurement condition is different between the first and second time periods. The distance calculator calculates the distance from the distance measuring device to a measurement target, based on the time from the emission to the reflection of light. The time is in at least one of the first and second time periods.
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Patent Agency Ranking
公开(公告)号：US10764505B2
公开(公告)日：2020-09-01
申请号：US16323434
申请日：2017-08-07
Inventor： Masato Takemoto , Shinzo Koyama , Shigeru Saitou , Motonori Ishii , Hiroshi Koshida
Abstract: A projection image pickup device includes a pulsed-light emitter, an optical sensor, a reference timing generator that generates a signal indicating an operation reference timing, a controller, and a signal processor. The signal processor sets a differential signal between an output signal from the optical sensor in the second exposure period and an output signal from the optical sensor in the first exposure period as a first differential signal, sets a differential signal between an output signal from the optical sensor in the third exposure period and the output signal from the optical sensor in the first exposure period as a second differential signal, and outputs the sum total of at least two differential signals including the first differential signal and the second differential signal.
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公开(公告)号：US11467285B2
公开(公告)日：2022-10-11
申请号：US16497754
申请日：2018-03-12
Inventor： Shigeru Saitou , Shinzo Koyama , Masato Takemoto , Motonori Ishii
Abstract: An image recognition device includes a light source that emits lighting pulses to a measurement space, a image generator that generates a distance image based on reflected light acquired by a light receiving element, a reflectivity calculator that calculates a correction coefficient corresponding to a reflectivity for each measurement section, and a lighting pulse controller that controls a number of lighting pulses emitted from the light source according to the correction coefficient for each measurement section.
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公开(公告)号：US20210166410A1
公开(公告)日：2021-06-03
申请号：US17171907
申请日：2021-02-09
Inventor： Shigeru SAITOU , Akihiro ODAGAWA , Shinzo Koyama , Masato Takemoto
Abstract: A distance measurement device includes: a light source configured to emit visible illumination light; an imaging element configured to receive reflected light of the illumination light from an object; and a signal processing circuit configured to reduce the emission of the illumination light in a predetermined period, detect a timing when the reception of the reflected light at the imaging element is reduced due to the reduction of the illumination light, and measure a distance to the object on the basis of the detected timing.
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公开(公告)号：US10984221B2
公开(公告)日：2021-04-20
申请号：US16494742
申请日：2018-03-12
Inventor： Shigeru Saitou , Shinzo Koyama , Masato Takemoto , Motonori Ishii
Abstract: An image recognition device includes: a luminance image generator and a distance image generator that generate a luminance image and a distance image, respectively, based on an image signal of an imaging target object output from a photoreceptor element; a target object recognition processor that extracts a target-object candidate from the luminance image using a machine learning database; and a three-dimensional object determination processor that uses the distance image to determine whether the extracted target-object candidate is a three-dimensional object. If it is determined that the target-object candidate is not a three-dimensional object, the target-object candidate extracted from the luminance image is prevented from being used, in the machine learning database, as image data for extracting a feature value of a target object.
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20.发明申请公开(公告)号：US20210011167A1
公开(公告)日：2021-01-14
申请号：US17029601
申请日：2020-09-23
Inventor： Motonori Ishii , Masato Takemoto , Shigeru Saitou , Shinzo Koyama
IPC: G01S17/89 , H04N5/353 , H04N5/3745 , G01S7/4865
Abstract: Each of column signal lines is connected to two or more of P pixels belonging to one of Q pixel columns of pixels. In each of the pixels, a first switch switches connection and disconnection between a light receiver and a first charge storage. A second switch switches connection and disconnection between the first charge storage and a second charge storage. A third switch switches connection and disconnection between the first charge storage and one of column signal lines corresponding to the pixel. The fourth switch switches the connection and disconnection between the second charge storage and the one of the column signal lines corresponding to the pixel.
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