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公开(公告)号：US20210221359A1
公开(公告)日：2021-07-22
申请号：US17051456
申请日：2019-04-17
摘要： 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：US20210165419A1
公开(公告)日：2021-06-03
申请号：US17045497
申请日：2019-04-03
摘要： A marker detection device which detects a magnetic marker laid in a road by using a sensor unit in which a plurality of combinations of a magnetic sensor and a magnetic-field generation coil are arranged includes a storage part which stores characteristic information of each magnetic-field generation coil, an estimation part which estimates a magnetic differential value acting on the magnetic sensor due to a current differential value acting on the magnetic-field generation coil by referring to the characteristic information of each magnetic-field generation coil, and a calibration part which calibrates each magnetic sensor so as to enhance uniformity in sensitivity, which is a ratio between an output differential value of the magnetic sensor in accordance with a change of a current by the current differential value acting on the magnetic-field generation coil and the estimated magnetic differential value.
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公开(公告)号：US20210149414A1
公开(公告)日：2021-05-20
申请号：US16622317
申请日：2018-06-07
摘要： In a marker detection method in which a sensor unit (11) that includes a plurality of magnetic sensors arranged in a vehicle width direction is used to detect magnetic markers (10) laid in a road, a feature value that represent symmetry of magnetic distribution, which is the distribution of magnetic measurement values obtained by each magnetic sensor included in the sensor unit (11) is generated, and threshold process regarding the feature value is executed to determine the possibility of the presence of magnetic generation source other than magnetic marker (10), that causes disturbance, and hence to suppress erroneous detection.
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公开(公告)号：US20210025959A1
公开(公告)日：2021-01-28
申请号：US17045500
申请日：2019-04-03
摘要： A marker detection device which detects a magnetic marker laid in a road by using a sensor unit in which a plurality of combinations of a magnetic sensor and a magnetic-field generation coil are arranged includes a storage part which stores characteristic information of each magnetic-field generation coil, an estimation part which estimates a magnetic differential value acting on the magnetic sensor due to a current differential value acting on the magnetic-field generation coil by referring to the characteristic information of each magnetic-field generation coil, and a calibration part which calibrates each magnetic sensor so as to enhance uniformity in sensitivity, which is a ratio between an output differential value of the magnetic sensor in accordance with a change of a current by the current differential value acting on the magnetic-field generation coil and the estimated magnetic differential value.
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45.发明申请公开(公告)号：US20200247300A1
公开(公告)日：2020-08-06
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：US20200088902A1
公开(公告)日：2020-03-19
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：US20190212169A1
公开(公告)日：2019-07-11
申请号：US16326221
申请日：2017-08-24
CPC分类号： G01C25/00 , G01C21/28 , G08G1/0104 , G08G1/133
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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48.发明申请公开(公告)号：US20190031076A1
公开(公告)日：2019-01-31
申请号：US16077012
申请日：2017-02-08
摘要： Provided are an installing method for efficiently installing a magnetic marker and a work vehicle. In a magnetic marker installing method for installing a magnetic marker to be laid on a road so as to be detectable by a magnetic sensor attached to a vehicle in order to achieve vehicle-side control to achieve assist in driving operation of the vehicle by a driver or automatic driving not relying on operation of the driver, a placing process P103 of placing the magnetic marker before magnetization on the road and a magnetizing process P106 of magnetizing the magnetic marker placed on the road by acting on the magnetic marker with a magnetic field are performed.
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公开(公告)号：US20180284310A1
公开(公告)日：2018-10-04
申请号：US15766046
申请日：2016-10-05
摘要： 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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公开(公告)号：US20180283904A1
公开(公告)日：2018-10-04
申请号：US15763177
申请日：2016-10-17
摘要： Provided is a magnetic marker detection method with high detection reliability. The magnetic marker detection method for detecting a magnetic marker (10) laid on a road while a vehicle (5) having a plurality of, at least two or more, magnetic sensors attached thereto is travelling includes a gradient generating process of generating a first magnetic gradient, which is a difference between magnetic measurement values of two magnetic sensors and a filter processing process of generating a filter output value by performing filter processing by a high-pass filter as to a change of the first magnetic gradient in a travelling direction of the vehicle. The magnetic marker (10) is detected by an arithmetic operation process regarding the filter output value.
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