Map information system

Patent metadata

Field	Value
Publication number	US-11796344-B2
Application number	US-202218064555-A
Country	US
Kind code	B2
Filing date	Dec 12, 2022
Priority date	Nov 5, 2018
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

Abstract

A map information system includes a map database including map information; and a driving assist level determination device. The map information is associated with an evaluation value indicating a certainty of the map information for each location in an absolute coordinate system. Information indicating that the intervention operation is performed is included in driving environment information indicating a driving environment of a vehicle. The driving assist level determination device is configured to acquire, based on the driving environment information, intervention operation information indicating an intervention operation location where the intervention operation is performed, acquire, based on the map information, the evaluation value for each point or section in a target range, and determine, based on the evaluation value and the intervention operation location, an allowable level for each point or section within the target range.

First claim

What is claimed is:

1. A management device comprising circuitry programmed to:
acquire, based on driving environment information indicating a driving environment of a vehicle, with an intention of a driver to intervene in a driver assistance control when a phenomenon undesirable for the driver assistance control is present, intervention operation information indicating an intervention operation location that is a location where an intervention operation is performed, the intervention operation being an operation performed by the driver of the vehicle to intervene in driving assist control during execution of the driving assist control, the driving environment information including information indicating that the intervention operation has been performed,
acquire, based on a map information, an evaluation value for each point or section within a target range, the map information being used for driving assist control for assisting driving of the vehicle and being associated with the evaluation value indicating a certainty of the map information for each location in an absolute coordinate system,
determine, based on the evaluation value and the intervention operation location, an allowable level of the driving assist control that is allowed when the vehicle travels in the target range for each point or section within the target range, and
perform the driving assist control of the allowable level of the driving assist control, based on the driving environment information and the map information,
wherein the evaluation value is set to be higher as an occupancy is higher, and
the occupancy is an average value of a plurality of measurement result values relating to a voxel around the vehicle when at least one laser beam of a peripheral condition sensor of the vehicle reflects upon the voxel,
wherein the evaluation value indicates a certainty of a presence of a stationary object in an absolute location, a presence of a road surface at the absolute location, or a certainty of a characteristic object present in the absolute location,
wherein the allowable level of the driving assist control is equal to or less than the allowable level of the driving assist control in a normal location that is not the intervention operation location, on condition that the evaluation values in the intervention operation location and the normal location are identical, and
wherein the circuitry is further configured to:
maintain the evaluation value in a normal position while reducing the evaluation value in the intervention operation location to acquire a corrected evaluation value,
set the allowable level of the driving assist control to a first level in a location where the corrected evaluation value is less than a threshold, and
set the allowable level of the driving assist control to a second level that is higher than the first level in a location where the corrected evaluation value is equal to or more than the threshold.

2. The management device according to claim 1 , wherein the circuitry is further configured to:
increase the threshold in the intervention operation location so as to be larger than the threshold in a normal position.

3. The management device according to claim 1 , further comprising a display device mounted on the vehicle, wherein:
the circuitry is further configured to determine the allowable level of the driving assist control along a target route for the vehicle to travel; and
the driving assist controller is configured to display on the display device a transition of the allowable level of the driving assist control from a current location or current time.

4. The management device according to claim 3 , wherein the driving assist controller is configured to display on the display device the target route and the transition of the allowable level of the driving assist control so as to be superimposed on a map.

5. A driver assist control method comprising:
acquiring, based on driving environment information indicating a driving environment of a vehicle, with an intention of a driver to intervene in a driver assistance control when a phenomenon undesirable for the driver assistance control is present, intervention operation information indicating an intervention operation location that is a location where an intervention operation is performed, the intervention operation being an operation performed by the driver of the vehicle to intervene in driving assist control during execution of the driving assist control, the driving environment information including information indicating that the intervention operation has been performed,
acquiring, based on a map information, an evaluation value for each point or section within a target range, the map information being used for driving assist control for assisting driving of the vehicle and being associated with the evaluation value indicating a certainty of the map information for each location in an absolute coordinate system,
determining, based on the evaluation value and the intervention operation location, an allowable level of the driving assist control that is allowed when the vehicle travels in the target range for each point or section within the target range, and
performing the driving assist control of the allowable level of the driving assist control, based on the driving environment information and the map information,
wherein the method further comprises setting the evaluation value to be higher as an occupancy is higher, and
the occupancy being an average value of a plurality of measurement result values relating to a voxel around the vehicle when at least one laser beam of a peripheral condition sensor of the vehicle reflects upon the voxel,
wherein the evaluation value indicates a certainty of a presence of a stationary object in an absolute location, a presence of a road surface at the absolute location, or a certainty of a characteristic object present in the absolute location,
wherein the determining of the allowable level of the driving assist control includes setting the allowable level of the driving assist control to be equal to or less than the allowable level of the driving assist control in a normal location that is not the intervention operation location, on condition that the evaluation values in the intervention operation location and the normal location are identical, and
wherein the method further comprises:
maintaining the evaluation value in a normal position while reducing the evaluation value in the intervention operation location to acquire a corrected evaluation value,
setting the allowable level of the driving assist control to a first level in a location where the corrected evaluation value is less than a threshold, and
setting the allowable level of the driving assist control to a second level that is higher than the first level in a location where the corrected evaluation value is equal to or more than the threshold.

6. The driver assist control method according to claim 5 , wherein the determining of the allowable level of the driving assist control further includes
increasing the threshold in the intervention operation location so as to be larger than the threshold in a normal position.

7. The driver assist control method according to claim 5 , the method further comprising:
determining the allowable level of the driving assist control along a target route for the vehicle to travel; and
displaying on a display device a transition of the allowable level of the driving assist control from a current location or current time.

8. The driver assist control method according to claim 7 , the method further comprising displaying on the display device the target route and the transition of the allowable level of the driving assist control so as to be supe

Assignees

• Toyota Motor Co Ltd

Inventors

• Kawanai Taichi
• Takagi Yasuhiro
• Harada Masahiro
• Kamata Nobuhide
• Sakaguchi Eiji
• Hokai Keisuke
• Matsui Hideyuki
• Kamikado Kazuhiko
• Hayashi Yusuke
• Fukamachi Hideo

Classifications

• G01C21/387 Primary

  Organisation of map data, e.g. version management or database structures · CPC title

• B60W30/09

  Taking automatic action to avoid collision, e.g. braking and steering · CPC title

• B60W30/182

  Selecting between different operative modes, e.g. comfort and performance modes · CPC title

• B60W50/0098

  Details of control systems ensuring comfort, safety or stability not otherwise provided for · CPC title

• G01C21/3407

  specially adapted for specific applications · CPC title