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公开(公告)号：US11862014B2
公开(公告)日：2024-01-02
申请号：US17414354
申请日：2019-12-27
Applicant: AICHI STEEL CORPORATION
Inventor： Michiharu Yamamoto , Tomohiko Nagao , Hitoshi Aoyama
CPC classification number: G08G1/042 , G06Q10/20 , G08G1/0116 , G08G1/0129
Abstract: In a magnetic marker system including a magnetic marker disposed in a travel environment so as to be detectable by a magnetic sensor attached to a vehicle and a server apparatus which acquires detection information of the magnetic marker from each vehicle, the detection information uploaded from a vehicle side to the server apparatus includes marker information, which is identification information of a corresponding magnetic marker, and the server apparatus estimates the state of the magnetic marker based on the detection information from each vehicle.
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公开(公告)号：US11454516B2
公开(公告)日：2022-09-27
申请号：US17059228
申请日：2019-05-17
Applicant: AICHI STEEL CORPORATION
Inventor： Michiharu Yamamoto , Tomohiko Nagao , Hitoshi Aoyama
Abstract: In a method of calibrating a gyro sensor mounted on a vehicle for measuring an angular velocity in a rotating direction generated about an axis of a vertical direction, a lateral shift amount detection process of detecting lateral shift amounts of the vehicle with respect to magnetic markers laid in a road, an azimuth estimation process of estimating, when the vehicle passes over a laying location where two magnetic markers are laid, an azimuth of the vehicle by a calculation process with the lateral shift amounts with respect to the two magnetic markers taken as input values, and a calibration process of calibrating the gyro sensor by using the azimuth of the vehicle estimated by the azimuth estimation process, are performed.
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公开(公告)号：US11242659B2
公开(公告)日：2022-02-08
申请号：US16770653
申请日：2018-12-10
Applicant: AICHI STEEL CORPORATION
Inventor： Michiharu Yamamoto , Tomohiko Nagao , Hitoshi Aoyama , Masayoshi Fujiya , Shin Takeuchi , Hideto Takeishi , Taizo Nishiyama
Abstract: Installation cart for laying a magnetic marker in a road to achieve driving assist control on a vehicle side has boring drill at each of front and rear of vehicle body, the boring drill boring accommodation hole as a laying position for the magnetic marker in road surface, is capable of boring accommodation holes at two locations with a predetermined space without moving in a state of being parked at any position, and is capable of performing efficient laying operation without requiring, for example, positioning of installation cart for enhancing accuracy of a space between these accommodation holes at two locations forming the laying positions.
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公开(公告)号：US11236476B2
公开(公告)日：2022-02-01
申请号：US16972023
申请日：2019-05-21
Applicant: AICHI STEEL CORPORATION
Inventor： Michiharu Yamamoto , Tomohiko Nagao , Hitoshi Aoyama
Abstract: To install, in or on a road surface of a road, a magnetic marker having retained in its outer perimeter an RFID tag including an antenna for wireless communication, an arrangement step of accommodating the magnetic marker in an accommodation hole provided to be bored in the road surface and a formation step of providing the magnetic marker with a protecting part for isolating the antenna from water are performed. With these steps, even if the periphery of the magnetic marker is submerged in water after installation, high communication performance of the RFID tag can be kept.
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公开(公告)号：US10539701B2
公开(公告)日：2020-01-21
申请号：US15766046
申请日：2016-10-05
Applicant: AICHI STEEL CORPORATION
Inventor： Takeshi Kawano , Hideo Arakawa , Michiharu Yamamoto , Hitoshi Aoyama , Kazuo Urakawa
Abstract: A minute magnetic body detecting sensor includes: a magnetic impedance element, with two magneto-sensitive bodies disposed in substantially two-dimensional directions such that an angle formed by respective sensitive axes is substantially 90 degrees; and a signal processing device, including a signal processing circuit, processing and amplifying damped oscillating voltages output by the two magneto-sensitive bodies that detected a local magnetic field due to a minute magnetic body that is a foreign substance, two square operating elements, squaring output signals, an adder, adding the squared signals, and a square root operating element, performing square root computation on the addition output and outputting a square root output, and enables high-precision detection of existence or non-existence of a minute magnetic body without detection overlooking.
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Patent Agency Ranking
公开(公告)号：US10120040B2
公开(公告)日：2018-11-06
申请号：US15076748
申请日：2016-03-22
Applicant: AICHI STEEL CORPORATION
Inventor： Takeshi Kawano , Hitoshi Aoyama , Michiharu Yamamoto , Hideo Arakawa
Abstract: A magnetic impedance sensor comprises an amorphous wire 1 of a magneto-sensitive material as the magneto-impedance element, a pulse oscillator means 2 that alternately reverses and outputs a basic pulse current and a compensating pulse current with polarity opposite to the basic pulse current in predetermined periods, and a signal processing means 3 that converts an alternate current voltage generated in response to a magnetic field intensity around the amorphous wire by a magnetic impedance effect of the amorphous wire according to the pulse current into a magnetic signal voltage in response to the magnetic field intensity, and outputs the magnetic signal voltage. Since the amorphous wire 1 is repeatedly reversely magnetized in the u and v circumferential directions, due to compensating the negative pulse current, the magnetic sensor with excellent linear characteristics are obtained.
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公开(公告)号：US11982639B2
公开(公告)日：2024-05-14
申请号：US17431711
申请日：2020-02-21
Applicant: Aichi Steel Corporation
Inventor： Michiharu Yamamoto , Hitoshi Aoyama
CPC classification number: G01N27/82 , G06T7/0002 , G06T7/13 , G06T7/73 , G05D1/0259 , G06T2207/30204 , G06T2207/30256
Abstract: A diagnostic vehicle (1) which diagnoses operation situations of magnetic markers (10) laid in or on a traveling road so as to be magnetically detectable by a vehicle includes sensor unit (11) which obtains a one-dimensional magnetic distribution by measuring a magnitude of magnetism with which any of magnetic markers (10) acts therearound, line sensor camera (13) which obtains a marker image, which is one-dimensional image information, by imaging magnetic marker (10), and diagnosing unit (15) which determines the presence or absence of a flaw in magnetic marker (10) based on a comparison between a magnetic distribution and the marker image.
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公开(公告)号：US11933633B2
公开(公告)日：2024-03-19
申请号：US17431710
申请日：2020-02-25
Applicant: Aichi Steel Corporation
Inventor： Michiharu Yamamoto , Hitoshi Aoyama
Abstract: A point cloud data acquiring system (1) is a system which acquires, as moving, point cloud data which serves as base data for a three-dimensional map representing a traveling environment of a vehicle includes range finding part (31) which acquires point cloud data representing azimuths and distances to planimetric features configuring the traveling environment, marker detecting part (2) which detects marker (10) laid in or on a traveling road of the vehicle, and a data recording part which records point cloud data acquired by range finding part (31) as linking thereto marker reference information including positional information with reference to any marker (10).
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公开(公告)号：US11801827B2
公开(公告)日：2023-10-31
申请号：US17051456
申请日：2019-04-17
Applicant: AICHI STEEL CORPORATION
Inventor： Michiharu Yamamoto , Tomohiko Nagao , Hitoshi Aoyama
CPC classification number: B60W30/06 , G05D1/0265 , G05D1/0274 , G06K19/0723 , G08G1/042 , H04W4/40 , G05D2201/0213
Abstract: An automatic parking system which controls a vehicle so as to cause the vehicle to be moved to a parking place and accommodated in a parking frame provided in the parking place includes a route where magnetic marker is laid so as to be detectable by using a magnetic sensor array provided to the vehicle, RFID tag providing tag information capable of identifying laying position of the magnetic marker, and a control server device which identifies a vehicle position based on the laying positions of the magnetic markers, allowing highly-accurate identification of the position of the vehicle to be forwarded and allowing operation with high reliability.
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公开(公告)号：US11631111B2
公开(公告)日：2023-04-18
申请号：US17460378
申请日：2021-08-30
Applicant: AICHI STEEL CORPORATION
Inventor： Michiharu Yamamoto , Tomohiko Nagao , Hitoshi Aoyama
IPC: G06Q30/02 , H04W4/02 , H04W4/40 , G06Q20/10 , G07C5/00 , G08G1/04 , G06Q30/0273 , H04W4/029 , G06Q30/0251 , G08G1/042
Abstract: A driving support system including an information acquiring part which acquires, from a vehicle side detecting a magnetic marker laid in a road and capable of acquiring marker identification information for identifying the magnetic marker detected, upload information including the marker identification information, an information providing part which provides the vehicle side as a transmission source of the upload information with support information, a configuration which provides information acquisition right which is a right to receive the support information to the vehicle, and a transmission source management area for registering the identification information of the vehicle as a provision destination of the support information by recording the identification information of the vehicle. The identification information of the vehicle is recorded in the transmission source management area and the information acquisition right is granted to the vehicle when the information acquiring part acquire the upload information.
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