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公开(公告)号:US11356822B2
公开(公告)日:2022-06-07
申请号:US17243583
申请日:2021-04-29
摘要: Provided is a driving assistance system capable of providing more pieces of information to a vehicle side by using magnetic markers. A driving assistance system (1A) is a system including magnetic markers (1) laid on a travelling road so as to be magnetically detectable and also be able to provide code information to a vehicle side, a vehicle (5) configured to be able to magnetically detect the magnetic markers (1) and also read the code information, and a base station (6) configured to make a reply with corresponding information when receiving the code information from the vehicle (5) reading the code information.
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公开(公告)号:US11339543B2
公开(公告)日:2022-05-24
申请号:US16770646
申请日:2018-12-10
发明人: Michiharu Yamamoto , Tomohiko Nagao , Hitoshi Aoyama , Masayoshi Fujiya , Shin Takeuchi , Hideto Takeishi , Taizo Nishiyama
摘要: An installation system has a laser range finder set at a reference position to measure a distance to a target, an installation cart which performs operation for laying a magnetic marker in a road, and an arithmetic unit which identifies a position relation of a laying position where the magnetic marker is laid with respect to the reference position. When operation for laying the magnetic marker in a road is performed, by taking the installation cart during performing the operation of laying the magnetic marker in the road as a target, based on a distance to the installation cart measured by the laser range finder, the position relation of the laying position with respect to the reference position is identified by the arithmetic unit.
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公开(公告)号:US11294090B2
公开(公告)日:2022-04-05
申请号:US16495117
申请日:2018-03-23
摘要: In a marker detection method for detecting magnetic markers (10) laid in a road by sensor units (11) attached to a vehicle (5), in a marker detection system (1) including two sensor units (11) arranged so as to be separated in a longitudinal direction of the vehicle (5) and two magnetic markers (10) arranged at spacings equal thereto so as to be simultaneously detectable by the two sensor units (11), magnetism generation sources simultaneously detected by the two sensor units (11) are detected as the magnetic markers (10), thereby reducing erroneous detection.
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公开(公告)号:US11287263B2
公开(公告)日:2022-03-29
申请号:US16644972
申请日:2018-08-29
摘要: A position capturing system (1) includes a vehicle (5) provided with a measuring unit (2) which magnetically detects a magnetic marker (10) laid in a road and determines a polarity thereof and a GPS unit (35) which measures a position; a database (34) having stored therein a laying position of each of magnetic markers (10) linked with polarity information of the magnetic marker (10); and a position capturing unit (32) which executes processes for capturing the position of the vehicle (5) by selecting corresponding laying position from the database (34) when any of the magnetic markers (10) is detected; and when any of the magnetic markers (10) is detected, selects the laying position located in a specified area with reference to a measured position by the GPS unit (35) and linked with polarity information which complies with the polarity of the detected magnetic marker (10).
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公开(公告)号:US20220074745A1
公开(公告)日:2022-03-10
申请号:US17417408
申请日:2019-12-27
发明人: Michiharu YAMAMOTO , Kazuo URAKAWA , Kota ARATANI
IPC分类号: G01C19/5776 , G01C21/28 , G08G1/09 , G08G1/01
摘要: A correction method for a gyro sensor which measures angular velocity of a vehicle about an axis in a vertical direction includes a generation process of performing a process on a difference between a measured azimuth obtained by performing a process on an sensor output, which is an output from the gyro sensor, and a vehicle azimuth estimated by using markers arranged along a traveling road of the vehicle to obtain correction information and a correction process of correcting the measured azimuth obtained by performing the process on the sensor output, which is the output from the gyro sensor, by using the correction information.
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公开(公告)号:US20220074028A1
公开(公告)日:2022-03-10
申请号:US17422954
申请日:2020-02-06
摘要: A forged component having a chemical composition including, by mass %, C: 0.30 to 0.45%, Si: 0.05 to 0.35%, Mn: 0.50 to 0.90%, P: 0.030% or less, S: 0.040 to 0.070%, Cr: 0.01 to 0.50%, Al: 0.001 to 0.050%, V: 0.25 to 0.35%, Ca: 0 to 0.0100%, N: 0.0150% or less, and the balance being Fe and unavoidable impurities, and satisfying Formulae 1 through 3. The: metal structure is a ferrite pearlite structure, and a ferrite area ratio is 30% or more; Vickers hardness is in the range of 320 to 380 HV; 0.2% yield strength is 800 MPa or more; a Charpy V-notch impact value is in the range of 15 to 25 J/cm2: and an unevenness of fracture surface (surface area/cross sectional area) of the Charpy test piece after fracture is in the range of 1.47 to 1.60.
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公开(公告)号:US11231721B2
公开(公告)日:2022-01-25
申请号:US16618172
申请日:2018-06-04
摘要: In an operation method of marker system (1) in which laying position information indicating a position where a magnetic marker (10) is laid is provided to a vehicle (3) side for achieving control for assisting driving of the vehicle (3) by using the magnetic marker (10), since positional accuracy required when laying magnetic markers (10) can be relaxed, the laying position information of the magnetic marker (10) positioned on the vehicle (3) side which performs the control for assisting driving is used as correction information to correct the laying position information indicating the position where the magnetic marker (10) is laid, and laying cost of magnetic markers (10) can be suppressed.
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公开(公告)号:US11220201B2
公开(公告)日:2022-01-11
申请号:US16840458
申请日:2020-04-06
摘要: A magnetic marker retaining method that includes placing a plurality of sheet-shaped magnetic markers on a surface of a band-shaped carrier sheet, the plurality of sheet-shaped magnetic markers being so as to be spaced in a longitudinal direction of the band-shaped carrier sheet; and retaining the plurality of sheet-shaped magnetic markers in a state of a roll body with the band-shaped carrier sheet rolled up in a roll shape, the band-shaped carrier sheet being rolled up such that each surface of the plurality of sheet-shaped magnetic markers directly contacts the other side of the surface of the band-shaped carrier sheet, on which the plurality of sheet-shaped magnetic markers are placed, and the plurality of sheet-shaped magnetic markers being to be laid on a road.
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公开(公告)号:US11175159B2
公开(公告)日:2021-11-16
申请号:US16326221
申请日:2017-08-24
摘要: A learning system (1) for vehicles for learning a neutral point of a measurement sensor equipped in a vehicle by using a magnetic marker disposed in a traveling road includes a sensor unit (11) which detects the magnetic marker and measures a lateral shift amount of the vehicle with respect to the magnetic marker, a route information acquiring part which acquires route information indicating a shape of the traveling road, and a learning determination part which determines whether a learning condition as a condition for performing learning of the neutral point of the measurement sensor is satisfied, wherein a fluctuation range of a lateral shift amount measured by the sensor unit (11) when the vehicle is traveling a learning road as a traveling road in a constant shape is equal to or smaller than a predetermined threshold is set at least as the learning condition.
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公开(公告)号:US20210340715A1
公开(公告)日:2021-11-04
申请号:US17279618
申请日:2019-09-24
摘要: In a magnetic marker system for achieving assists for vehicle driving operation by a driver or vehicle control for automatic driving independent from driver's operation, magnetic markers are laid so that orientations of magnetic poles are alternately reversed along a road and arranged so that magnetic fields of magnetic markers adjacent to each other as being spaced with a gap along the road interfere with each other, thereby improving reliability of detecting a magnetic marker on a vehicle side while reducing magnetic force of the magnetic marker itself.
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