Patent ID: 11921516
Assignee: AICHI STEEL CORPORATION
Field: Control (Instruments)
Classification: CPC G  B | IPC B  G

Claim 0:
1. A driving assistance system, comprising:
a magnetic marker including
a magnet which generates a magnetic field, and
a radio tag which provides information to a vehicle side, wherein the magnetic marker is to be laid in or on a travelling road so as to be detectable by a magnetic sensor attached to a vehicle to achieve drive assist control of the vehicle using magnetism generated by the magnet, the magnet has a flat circular shape, the magnet is a sheet of an isotropic ferrite rubber bond magnet, which is a permanent magnet made by including a magnetic powder of iron oxide into a binder made of a high-polymer material, the radio tag and the magnet are integrated together by placing the radio tag directly on at least a center of a surface of the magnet with the flat circular shape, the radio tag uses a frequency band of 710 MHZ to 960 MHz, the radio tag is sheet-shaped and laminated on the surface of the magnet, and a thickness of the magnet is larger than a thickness of the radio tag; and a vehicle including
vehicle-mounted circuitry including
a magnetic sensor which magnetically detects the magnetic marker, and
a radio tag reader which acquires information provided by the radio tag, wherein

the vehicle-mounted circuitry is configured to
determine whether the magnetic marker has been detected by the magnetic sensor,
supply operating power to the radio tag in response to determining the magnetic marker has been detected by the magnetic sensor, and
cause the radio tag reader to start acquiring the information provided by the radio tag that has been supplied with the operating power.