MAP GENERATION SYSTEM, MAP GENERATION DEVICE, MAP GENERATION METHOD, AND PROGRAM

• US 20160078757A1
• Filed: 03/26/2014
• Published: 03/17/2016
• Est. Priority Date: 03/28/2013
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Inaba, Tomonobu, SATOU, Hiromi, Imai, Naoko
• Granted Patent: US 9,812,007 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G08G 1/0112 from the vehicle, e.g. floating car data [FCD]
• CPC Class Codes: G08G 1/0125 Traffic data processing
• CPC Class Codes: G08G 1/0133 for classifying traffic situation
• CPC Class Codes: G08G 1/0141 for traffic information dissemination
• CPC Class Codes: G08G 1/056 with provision for distinguishing direction of travel
• CPC Class Codes: G08G 1/096741 where the source of the transmitted information selects which information to transmit to each vehicle
• CPC Class Codes: G08G 1/096783 where the origin of the information is a roadside individual element
• CPC Class Codes: G08G 1/0968 Systems involving transmission of navigation instructions to the vehicle
• CPC Class Codes: G08G 1/096811 where the route is computed offboard
• CPC Class Codes: G08G 1/096844 where the complete route is dynamically recomputed based on new data
• CPC Class Codes: G08G 1/16 Anti-collision systems road vehicle drive control systems for predicting or avoiding probable or impending collision otherwise than by control of a particular sub-unit B60W30/08
• CPC Class Codes: G09B 29/007 using computer methods
• CPC Class Codes: G09B 29/10 Map spot or coordinate position indicators; Map reading aids optical projection apparatus per se G03B

Abstract

A map generation system includes: an extraction unit that collects vehicle speed information, which includes at least a speed, acceleration, and deceleration, from a vehicle and that extracts rapid deceleration information, which includes a first location where a rapid deceleration event satisfying predetermined conditions has occurred, and a traveling direction of the vehicle at the time when the rapid deceleration event has occurred from the collected vehicle speed information; a storage unit that stores map data; a division unit that generates mesh map data by dividing the map data stored in the storage unit into a plurality of meshes in a predetermined size and a predetermined number of divisions; and an estimation unit that estimates a location that requires caution when the vehicle travels therethrough, as a caution-required place, based on the rapid deceleration information extracted by the extraction unit and the mesh map data generated by the division unit.

Claims

1. A map generation system, comprising:

an extraction unit that collects vehicle speed information, which includes at least a speed, acceleration, and deceleration, from a vehicle and that extracts rapid deceleration information, which includes a first location where a rapid deceleration event satisfying predetermined conditions has occurred, and a traveling direction of the vehicle at the time when the rapid deceleration event has occurred from the collected vehicle speed information;

a storage unit that stores map data;

a division unit that generates mesh map data by dividing the map data stored in the storage unit into a plurality of meshes in a predetermined size and a predetermined number of divisions; and

an estimation unit that estimates a location that requires caution when the vehicle travels therethrough, as a caution-required place, based on the rapid deceleration information extracted by the extraction unit and the mesh map data generated by the division unit.

2. The map generation system according to claim 1,

wherein intersection location information indicating a location of an intersection is included in the map data, and

the estimation unit estimates the location of the intersection on the map data present in a front mesh in front of the mesh in which the first location indicated by the rapid deceleration information is included, as the caution-required place.

3. The map generation system according to claim 2,

wherein the division unit divides the map data into a plurality of block-shaped meshes in the predetermined size and the predetermined number of divisions, and

the estimation unit sets the front mesh such that a bottom center portion of the front mesh having a plurality of meshes configured similarly to the plurality of meshes is provided at the first location where the rapid deceleration event has occurred.

4. The map generation system according to claim 1,

wherein the vehicle speed information is information including vehicle speed information accumulated for a predetermined period of time, and

the extraction unit levels the vehicle speed information in the predetermined period of time.

5. The map generation system according to claim 2,

wherein, when a traffic signal is present at the location of the intersection, the estimation unit does not estimate the location of the intersection as the caution-required place.

6. The map generation system according to claim 2,

wherein the estimation unit calculates a target speed in the caution-required place based on the vehicle speed information, and associates the target speed with the caution-required place.

7. The map generation system according to claim 2, further comprising:

a word-of-mouth storage unit that stores word-of-mouth information including location information and road safety information at the location, the word-of-mouth information being provided from a plurality of users through a network, and

a word-of-mouth unit that associates the caution-required place and the word-of-mouth information with each other when the word-of-mouth information regarding the caution-required place is present.

8. A map generation device, comprising:

an extraction unit that collects vehicle speed information, which includes at least a speed, acceleration, and deceleration, from a vehicle and that extracts rapid deceleration information, which includes a first location where a rapid deceleration event satisfying predetermined conditions has occurred, and a traveling direction of the vehicle at the time when the rapid deceleration event has occurred from the collected vehicle speed information;

a storage unit that stores map data;

a division unit that generates mesh map data by dividing the map data stored in the storage unit into a plurality of meshes in a predetermined size and a predetermined number of divisions; and

an estimation unit that estimates a location that requires caution when the vehicle travels therethrough, as a caution-required place, based on the rapid deceleration information extracted by the extraction unit and the mesh map data generated by the division unit.

9. A map generation method, comprising:

a first step in which a map generation device including a storage unit that stores map data collects vehicle speed information, which includes at least a speed, acceleration, and deceleration, from a vehicle and that extracts rapid deceleration information, which includes a first location where a rapid deceleration event satisfying predetermined conditions has occurred, and a traveling direction of the vehicle at the time when the rapid deceleration event has occurred from the collected vehicle speed information;

a second step of generating mesh map data by dividing the map data stored in the storage unit into a plurality of meshes in a predetermined size and a predetermined number of divisions; and

a third step of estimating a location that requires caution when the vehicle travels therethrough, as a caution-required place, based on the rapid deceleration information extracted in the first step and the mesh map data generated in the second step.

10. A program causing a computer including a storage unit that stores map data to execute:

a first step of collecting vehicle speed information, which includes at least a speed, acceleration, and deceleration, from a vehicle and extracting rapid deceleration information, which includes a first location where a rapid deceleration event satisfying predetermined conditions has occurred, and a traveling direction of the vehicle at the time when the rapid deceleration event has occurred from the collected vehicle speed information;

a second step of generating mesh map data by dividing the map data stored in the storage unit into a plurality of meshes in a predetermined size and a predetermined number of divisions; and

a third step of estimating a location that requires caution when the vehicle travels therethrough, as a caution-required place, based on the rapid deceleration information extracted in the first step and the mesh map data generated in the second step.