Aichi Steel Corporation

National Institute of Advanced Industrial Science and Technology

Aichi Micro Intelligent Corporation

Advanced Smart Mobility Co., Ltd.

Hitoshi Aoyama

Michiharu Yamamoto

Tomohiko Nagao

Takeshi Kawano

Hideo Arakawa

Yoshinobu Honkura

Shin Takeuchi

Hideto Takeishi

Ippei Akita

Taizo Nishiyama

Masayoshi Fujiya

Kazuo Urakawa

Eiji Kako

Takumi Asano

Koei Gemba

Katsuhiko Tsuchida

Keiji Aoki

Aoki Keiji

A patrol robot including a plurality of magnetic sensors for detecting a magnetic marker laid on a traveling road has at least two or more magnetic sensors arrayed on a sensor array line linearly extending along any direction. In the patrol robot, two sensor array lines are formed, and since at least any one sensor array line can cross with respect to a relative moving direction of the magnetic marker with a movement of the patrol robot, the magnetic marker can be detected with high reliability, irrespective of the moving mode.

System and magnetic marker detection method

In a designing method for setting a specification of an individual-piece magnetic marker to be laid on a road surface, a specification of the magnetic marker is appropriately set based on a correlation coefficient between a first distribution of strengths of magnetism in a forwarding direction acting on a position at a minimum attachment height in a range of attachment heights of the magnetic sensor assumed in respective vehicles and a second distribution representing a distribution of strengths of magnetism in the forwarding direction acting on the position at the minimum attachment height when magnetism is assumed to be generated from a one-point magnetism generation source.

Magnetic marker system and magnetic marker system designing method

A magnetic sensor includes: a sensor head having a magnetic material; a drive unit configured to energize the sensor head; a pickup coil close to the sensor head; and an information processing unit configured to generate a bias magnetic field by energizing the pickup coil and detect a signal corresponding to an induced voltage generated in the pickup coil, in which the information processing unit generates a difference signal indicating a difference between a first signal corresponding to a first voltage generated in the pickup coil when the sensor head is in an energized state and a second signal corresponding to a second voltage generated in the pickup coil when the sensor head is in a non-energized state.

Magnetic sensor and biomagnetism measuring apparatus

A magnetic sensor includes a magneto-sensitive body whose electromagnetic properties change under an action of an external magnetic field, a coil disposed to obtain an induced voltage proportional to the external magnetic field, a sampler configured to sample the induced voltage generated in the coil and obtains a sampling voltage, and an automatic correction circuit configured to relatively adjust a rise timing of a magneto-sensitive body clock for driving the magneto-sensitive body and a rise timing of a sampler clock for driving the sampler according to the sampling voltage.

Magnetic sensor and biomagnetic measurement device

In an operation system () for a bus () including a connection point database which stores identification information of a magnetic marker () positioned so as to correspond to a connection point () between a dedicated lane () having magnetic markers () laid thereon and a general lane (), the connection point () is set so as to correspond to the magnetic marker () according to identification information stored in a connection point database, thereby allowing flexibility in changing a route to be improved in the operation system which causes a vehicle to operate along a route defined in advance.

Operation system and operation system control method

A map () to be used by a vehicle which can measure magnetism acting from a road surface side forming a surface of a road to estimate an own vehicle position includes a structure map (M) which represents a road structure and has position data indicating an absolute position linked to each point and a road-surface magnetic distribution (M) which is magnetic data at each point on the road surface and has position data indicating an absolute position linked to each point. In the map (), the structure map (M) and the road-surface magnetic distribution (M) are associated with each other via the position data indicating the absolute position.

Map data and map data generation method

A position estimation system for a vehicle including a magnetic sensor which measures magnetism acting from a road surface side forming a surface of a traveling road to estimate an own vehicle position includes a map DB which stores a map () associated with a road-surface magnetic distribution (M), which is a distribution of quantities of magnetism at respective points on the road surface, a magnetic distribution generation part which acquires magnetic measurement values from the magnetic sensor and generates a measured magnetic distribution, which is a distribution of magnetic measurement values, and a position estimation part which specifies an area corresponding to the measured magnetic distribution in the road-surface magnetic distribution (M) associated with the map stored in the map DB and estimates the own vehicle position based on a position of the area corresponding to the measured magnetic distribution on the map.

Position estimation method and position estimation system

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.

Automatic parking system

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.

Marker detection system and method of operating marker detection system

A vehicular orientation detection system () for detecting an orientation of a vehicle () traveling a road surface (S) where magnetic markers () are laid includes sensor units () which each include a plurality of magnetic sensors arrayed in a vehicle width direction and measure a lateral shift amount with respect to the magnetic markers () and a control unit () which computes a difference between lateral shift amounts measured with any one of the magnetic markers () by front and rear sensor units () positioned at two locations separated in a longitudinal direction of the vehicle ().

Vehicular orientation detection system

A diagnostic vehicle () which diagnoses operation situations of magnetic markers () laid in or on a traveling road so as to be magnetically detectable by a vehicle includes sensor unit () which obtains a one-dimensional magnetic distribution by measuring a magnitude of magnetism with which any of magnetic markers () acts therearound, line sensor camera () which obtains a marker image, which is one-dimensional image information, by imaging magnetic marker (), and diagnosing unit () which determines the presence or absence of a flaw in magnetic marker () based on a comparison between a magnetic distribution and the marker image.

Magnetic marker diagnostic system and diagnostic method

A point cloud data acquiring system () 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 () which acquires point cloud data representing azimuths and distances to planimetric features configuring the traveling environment, marker detecting part () which detects marker () 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 () as linking thereto marker reference information including positional information with reference to any marker ().

Point cloud data acquiring method and point cloud data acquiring system

Provided is a driving assistance system using a magnetic marker capable of providing more pieces of information. In the driving assistance system for assisting driving of a vehicle, a magnetic marker () including a magnet sheet () serving as a magnetism generating unit which generates a magnetic field and also an RFID tag () as an information providing unit which provides information to a vehicle side is laid on a travelling road of the vehicle, and the vehicle includes a magnetic sensor serving as a magnetism detecting unit which magnetically detects the magnetic marker () and also a tag reader as an information acquiring unit which acquires the information provided by the RFID tag () included in the magnetic marker ().

Magnetic marker and driving assistance system

A vehicle including a magnetic detecting part for detecting a magnetic marker disposed in a road is configured to acquire marker state information indicating the state of the magnetic marker from an external server apparatus via wireless communication and diagnose the state of the magnetic detecting part by using a result of detection of the magnetic marker in which the state of the magnetic marker indicated by the marker state information is good, thereby allowing inspection cost and cost of maintenance of the magnetic detecting part for detecting the magnetic marker to be suppressed.

Vehicle and vehicular diagnostic system

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.

Growing community of inventors

Tokai, Japan

Hitoshi Aoyama