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公开(公告)号：US20230051900A1
公开(公告)日：2023-02-16
申请号：US17978256
申请日：2022-11-01
Applicant: FUJITSU LIMITED
Inventor： Arata EJIRI , Yoshiaki Ikai , Kosuke YANAI , Koichi Iida
Abstract: A distance measurement apparatus of a scanning type provided with a two-dimensional micro electro mechanical system (MEMS) mirror that reflects a laser beam includes: a first detector that detects a mirror angle of the two-dimensional MEMS mirror and outputs an angular signal that indicates the mirror angle; and a processor that calculates an amplitude error and a phase error between amplitude and a phase of the angular signal and amplitude and a phase of a reference angle signal, and corrects a resonance drive waveform of a drive signal that drives, of two mutually orthogonal axes of the two-dimensional MEMS mirror, one axis on a resonance drive side on a basis of the amplitude error and the phase error.
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公开(公告)号：US20210325534A1
公开(公告)日：2021-10-21
申请号：US17193599
申请日：2021-03-05
Applicant: FUJITSU LIMITED
Inventor： Katsushi Sakai , Koichi Tezuka , Koichi Iida , KOSUKE YANAI
IPC: G01S17/08 , G01S17/894 , G01S7/4865
Abstract: A measurement method executed by a computer, the method includes executing transmission processing and measuring processing, the transmission processing including a process of notifying a first signal instructing light emitting processing and the measuring processing, the measuring processing including a process of identifying a distance by measuring a time from a reception time of the first signal; setting a communication path for notifying a second signal output by the transmission processing to the measuring processing via a transceiver for transmitting a synchronization signal, the synchronization signal being for notifying an external measurement device of a light emission output by the light emitting processing; and identifying a timing for transmitting the synchronization signal output by the transmission processing based on a time difference between a time for receiving the second signal not through the transceiver and a time for receiving the second signal via the transceiver.
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公开(公告)号：US09046599B2
公开(公告)日：2015-06-02
申请号：US13945212
申请日：2013-07-18
Applicant: FUJITSU LIMITED
Inventor： Takeshi Morikawa , Koichi Tezuka , Koichi Iida
CPC classification number: G01S13/06 , G01S7/4817 , G01S17/42 , G01S17/87 , G01S17/936
Abstract: An object detection apparatus includes: a first radar configured to measure first positional information regarding a first object existing in a first scan range; a second radar configured to measure second positional information regarding a second object existing in a second scan range on the basis of second reflected wave of second wave radiated onto the second scan range including the first region and a second region, the second wave being radiated in such a way as to scan the first region in a direction opposite a direction in which the first radar radiates the first wave; and a processor configured to detect a third object existing in the first region on the basis of the first positional information and the second positional information.
Abstract translation: 物体检测装置包括：第一雷达，被配置为测量关于存在于第一扫描范围中的第一对象的第一位置信息; 第二雷达，被配置为基于辐射到包括第一区域和第二区域的第二扫描范围的第二波的第二反射波来测量关于存在于第二扫描范围中的第二对象的第二位置信息，第二波被辐射在 这样的方式可以在与第一雷达辐射第一波的方向相反的方向上扫描第一区域; 以及处理器，被配置为基于第一位置信息和第二位置信息来检测存在于第一区域中的第三对象。
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公开(公告)号：US20180106894A1
公开(公告)日：2018-04-19
申请号：US15707466
申请日：2017-09-18
Applicant: FUJITSU LIMITED
Inventor： Takeshi MORIKAWA , Koichi Tezuka , Koichi Iida
CPC classification number: G01S7/52077 , G01S7/4817 , G01S7/497 , G01S7/523 , G01S17/08 , G01S17/10 , G01S17/42 , G01S17/66 , G01S17/87 , G01S17/89
Abstract: A distance measuring apparatus measures a distance to a target from a plurality of directions, and includes sensors having identical two-dimensional scan type configurations that launch a laser beam and receive reflected light from the target by a multi-segment light receiving element, and a processor. The processor performs a process including specifying a receiving part of the multi-segment light receiving element of a first sensor, that receives a second laser beam launched from a second sensor in a state in which the target is non-detectable by the first sensor, adjusting a phase in a vertical scan direction of the second laser beam with respect to that of a first laser beam launched from the first sensor, until the receiving part no longer receives the second laser beam, and integrating range images from the first and second sensors after the phase is adjusted.
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公开(公告)号：US20170276771A1
公开(公告)日：2017-09-28
申请号：US15415488
申请日：2017-01-25
Applicant: FUJITSU LIMITED
Inventor： Kazunori Hayami , Koichi Iida
CPC classification number: G01S7/484 , G01S7/4817 , G01S7/4865 , G01S17/10 , G01S17/42 , H01S5/0261 , H01S5/0428 , H01S5/06216
Abstract: A method for controlling a laser radar device, the method includes: closing a first switch configured to open or close a power supply circuit including a laser element; applying a voltage in a forward direction to the laser element; illuminating an object with an electromagnetic wave emitted from the laser element; applying, to the laser element, a voltage in a reverse direction that is opposite to the forward direction when the first switch is opened; detecting a reflected wave from the object; and measuring a location of the object.
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Patent Agency Ranking
公开(公告)号：US20170102461A1
公开(公告)日：2017-04-13
申请号：US15287279
申请日：2016-10-06
Applicant: FUJITSU LIMITED
Inventor： Koichi Tezuka , Koichi Iida
CPC classification number: G01S17/08 , G01S7/4816 , G01S7/4863 , G01S7/4911 , G01S7/4972 , G01S17/10 , G01S17/42
Abstract: A distance measuring apparatus includes a projector configured to project laser beam at a projection angle to an object; a photodetector array in which a plurality of photodetectors are arranged; a condenser lens configured to concentrate, on the photodetector array, the laser beam reflected by the object positioned on a direction of the projection angle; a detector configured to detect an output of at least one of the photodetectors of the photodetector array; and a selector configured to select the photodetector from which the detector receives the output, depending on a distortion of an area on the photodetector array irradiated with the reflected laser beam when the projection angle is large, the area being determined by an angle of incidence of the reflected laser beam to the condenser lens, the angle of incidence being associated with the projection angle.
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公开(公告)号：US09207074B2
公开(公告)日：2015-12-08
申请号：US14100337
申请日：2013-12-09
Applicant: FUJITSU LIMITED
Inventor： Koichi Iida , Koichi Tezuka
CPC classification number: G01C3/08 , G01S17/42 , G01S17/936
Abstract: A distance measurement method, includes measuring a distance to an object by means of a distance measurement circuit of a distance measurement apparatus and by scanning a light beam; designating a first mode which controls a projection angle of the light beam so that sampling positions in a given number of successive scans do not overlap, when the distance to the object is greater than or equal to a threshold value, by using the processor; and designating a second mode which controls the projection angle of the light beam so that the sampling positions overlap in each scan, when the distance to the object is less than the threshold value, by using the processor.
Abstract translation: 距离测量方法，包括通过距离测量装置的距离测量电路和扫描光束来测量到物体的距离; 指定控制光束的投影角度的第一模式，使得当通过使用处理器到达对象的距离大于或等于阈值时，给定次数的连续扫描中的采样位置不重叠; 并且指定第二模式，其通过使用所述处理器来控制所述光束的投影角度，使得当与所述对象的距离小于所述阈值时，每次扫描中的所述采样位置重叠。
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公开(公告)号：US20140062759A1
公开(公告)日：2014-03-06
申请号：US13945212
申请日：2013-07-18
Applicant: FUJITSU LIMITED
Inventor： Takeshi MORIKAWA , Koichi Tezuka , Koichi Iida
IPC: G01S13/06
CPC classification number: G01S13/06 , G01S7/4817 , G01S17/42 , G01S17/87 , G01S17/936
Abstract: An object detection apparatus includes: a first radar configured to measure first positional information regarding a first object existing in a first scan range; a second radar configured to measure second positional information regarding a second object existing in a second scan range on the basis of second reflected wave of second wave radiated onto the second scan range including the first region and a second region, the second wave being radiated in such a way as to scan the first region in a direction opposite a direction in which the first radar radiates the first wave; and a processor configured to detect a third object existing in the first region on the basis of the first positional information and the second positional information.
Abstract translation: 物体检测装置包括：第一雷达，被配置为测量关于存在于第一扫描范围中的第一对象的第一位置信息; 第二雷达，被配置为基于辐射到包括第一区域和第二区域的第二扫描范围的第二波的第二反射波来测量关于存在于第二扫描范围中的第二对象的第二位置信息，第二波被辐射在 这样的方式可以在与第一雷达辐射第一波的方向相反的方向上扫描第一区域; 以及处理器，被配置为基于第一位置信息和第二位置信息来检测存在于第一区域中的第三对象。
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公开(公告)号：US20230082295A1
公开(公告)日：2023-03-16
申请号：US17990259
申请日：2022-11-18
Applicant: FUJITSU LIMITED
Inventor： KOSUKE YANAI , Shinichi Fujiyoshi , Yoshikatsu KOHARA , Etsuko YAMASHITA , Koichi Iida , Katsushi Sakai
IPC: G01S17/26 , G01S7/4865 , G01S7/481
Abstract: A measurement device includes: a memory; and a processor coupled to the memory and configured to: generate a drive signal with a sine wave, according to a clock signal; control a reflection direction of output light of a light emitting device, by utilizing a resonance frequency, according to the drive signal; control a timing at which the drive signal is generated; and add or remove a pulse of a reference clock signal configured to generate the clock signal, according to a phase difference between a desired control signal and the control signal.
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公开(公告)号：US20220082666A1
公开(公告)日：2022-03-17
申请号：US17464822
申请日：2021-09-02
Applicant: FUJITSU LIMITED
Inventor： KOSUKE YANAI , Yoshikatsu KOHARA , Shinichi Fujiyoshi , Koichi Iida , Takeshi MORIKAWA , Katsushi Sakai
Abstract: A laser sensor includes: a micro electro mechanical systems (MEMS) mirror that performs scanning in a reflection direction of laser light of a light emitting device on a first axis in a resonance direction and a second axis in a non-resonant direction; and a processor that performs control that synchronizes a drive cycle of the second axis with the drive cycle of the second axis of the MEMS mirror mounted on another laser sensor, using a timing designated based on the drive cycle of the first axis.
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