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US 12,607,485 B2Granted
Magnetic marker detection method and detection system
AssigneeAichi Steel Corporation
InventorsMichiharu Yamamoto, Tomohiko Nagao, Hitoshi Aoyama
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AssigneeAichi Steel Corporation
InventorsMichiharu Yamamoto, Tomohiko Nagao, Hitoshi Aoyama
Estimating the term…
Magnetic marker detection system for a vehicle including sensor array with magnetic sensors arrayed in a width direction to detect a magnetic marker laid in a traveling road includes differential circuit that obtains a difference between magnetic measurement values for each combination of two magnetic sensors spaced with a predetermined space, arithmetic circuit that performs process for detecting a position of the magnetic marker by processing the difference for the each combination, and setting circuit that selectively sets the predetermined space for obtaining the difference between magnetic measurement values; magnetic marker detection system can detect the magnetic marker laid in the traveling road with high certainty, irrespective of variations in attachment height of the magnetic sensors on a vehicle side.
A magnetic marker detection method for a vehicle including a sensor array with a plurality of magnetic sensors that obtain magnetic measurement values arrayed in a width direction to detect a magnetic marker laid in a traveling road, the magnetic marker detection method comprising:
A magnetic marker detection system for a vehicle including a sensor array with a plurality of magnetic sensors that obtain magnetic measurement values arrayed in a width direction to detect a magnetic marker laid in a traveling road, the magnetic marker detection system comprising:
Dependencies are inferred from the claim text.
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Measuring arrangements characterised by the use of electric or magnetic techniques
Using electric or magnetic means: influencing the magnitude of a current or voltage
Related to ambient conditions: road conditions
Measuring arrangements characterised by the use of electric or magnetic techniques: for measuring position, not involving coordinate determination
About 16 years 7 months of term left · ends 22 May 2043 (estimated)
The present application is based on PCT filing PCT/JP2022/024756, filed Jun. 21, 2022, which claims priority from Japanese Patent Application No. 2021-105652, filed Jun. 25, 2021, the entire contents of each are incorporated herein by reference.
The present invention relates to a detection method and a detection system for detecting a magnetic marker laid in a traveling road.
Conventionally, a vehicular system using magnetic markers laid in a road has been known (for example, refer to Patent Literature 1). This system has an object of providing various driving assists, such as automatic steering control and lane departure warning using magnetic markers, by taking a vehicle including magnetic sensors as a target.
FIG. 1 is a front view of a vehicle having a magnetic marker detection system mounted thereon in a first embodiment.
FIG. 2 is a descriptive diagram depicting the vehicle on a lane where magnetic markers are laid in the first embodiment.
FIG. 3 is a perspective view of a magnetic marker in the first embodiment.
Embodiments of the present invention are specifically described by using the following embodiments.
The present embodiment is an example regarding a detection method and detection system 1 for detecting magnetic marker 10 laid in a road. Details of this are described by using FIG. 1 to FIG. 10.
The present embodiment is an example in which, as in FIG. 1 and FIG. 2, detection system 1 for magnetic markers 10 is combined with driving assist system 5S allowing lane keeping traveling. Driving assist system 5S is configured to include vehicle ECU 50 that controls a steering actuator, not depicted, for steering wheels to be steered, a throttle actuator that adjusts engine outputs, and so forth. For example, vehicle ECU 50 controls vehicle 5 so that a lateral shift amount with respect to magnetic marker 10 is brought closer to zero, achieving lane keeping traveling.