# US 10,121,378 B2 · Collision avoidance system

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- Number: US 10,121,378 B2
- Document ID: US10121378B2
- Status: Granted
- Kind: B2
- Application number: 15/539,655
- Filed: 2014-12-26
- Published: 2017-12-28
- Granted: 2018-11-06
- Earliest claimed: 2014-12-26
- Assignees: The Yokohama Rubber Co., Ltd.
- Applicants: The Yokohama Rubber Co., LTD.
- Inventors: Yuji Kodama; Koji Nakatani
- Web page: https://patentgrep.com/patent/US10121378B2

## CPC

- G08G 1/166: {for active traffic, e.g. moving vehicles, pedestrians, bikes}
- B60C 19/00: Tyre parts or constructions not otherwise provided for
- B60C 23/04: mounted on the wheel or tyre
- B60C 23/06: Signalling devices actuated by deformation of the tyre {, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle}
- B60Q 9/008: {for anti-collision purposes}
- B60R 21/00: Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks (safety belts or body harnesses in vehicles B60R22/00; seats constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats, B60N2/42; energy-absorbing arrangements for hand wheels for steering vehicles B62D1/11; energy-absorbing arrangements for vehicle steering columns B62D1/19)
- B60T 7/12: for automatic initiation; for initiation not subject to will of driver or passenger {(limiting speed of vehicles other than rail vehicles B60K31/00)}
- G08G 1/01: Detecting movement of traffic to be counted or controlled (G08G1/07 - G08G1/14 take precedence)
- G08G 1/09: Arrangements for giving variable traffic instructions ({railroad crossing signals B61L; reflectors E01F, G08B}; indicating arrangements for variable information by selection or combination of individual elements G09F9/00)
- G08G 1/0967: Systems involving transmission of highway information, e.g. weather, speed limits (transmission of navigation instructions to the vehicle G08G1/0968)
- G08G 1/096733: {where a selection of the information might take place}
- G08G 1/096791: {where the origin of the information is another vehicle}
- 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)
- G08G 1/093: {Data selection, e.g. prioritizing information, managing message queues, selecting the information to be output}
- G08G: TRAFFIC CONTROL SYSTEMS (guiding railway traffic, ensuring the safety of railway traffic B61L; arrangement of road signs or traffic signals E01F9/00; radar or analogous systems, sonar systems, lidar systems specially adapted for traffic control G01S13/91, G01S15/88, G01S17/88; {radar or analogous systems, sonar systems, lidar systems specially adapted for anti-collision purposes G01S13/93, G01S15/93, G01S17/93})
- B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60Q: ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60T: VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES

## Abstract

A collision avoidance system includes: an onboard acquisition unit provided in a vehicle traveling on a road that acquires state quantity data indicating a state quantity of a pneumatic tire of the vehicle; an onboard transmission unit provided in the vehicle that transmits the state quantity data acquired by the onboard acquisition unit to a data acquisition roadside device installed on the road; an abnormality determination unit that determines whether or not the state quantity data is abnormal; and a management device including a data acquisition unit that acquires the state quantity data from the data acquisition roadside device, a data storage unit that stores the state quantity data acquired by the data acquisition unit, and a data distribution unit that distributes the state quantity data determined as abnormal by the abnormality determination unit.

## Claims

### Claim 1

A collision avoidance system, comprising:
an onboard acquisition unit provided in a vehicle traveling on a road and configured to acquire state quantity data indicating a state quantity of a pneumatic tire of the vehicle, the state quantity including an amount of wear of the pneumatic tire, the onboard acquisition unit comprising:
a wear operation determination unit configured to determine whether or not a wear operation whereby the pneumatic tire is worn has been performed, the wear operation including at least one of a rapid deceleration operation where the vehicle decelerates at a first predetermined speed per unit time or faster, or a cornering operation where the vehicle travels on a curve having a curvature radius less than or equal to a predetermined value at a second predetermined speed or faster; and
an estimation unit configured to estimate the amount of wear of the pneumatic tire on the basis of history data of the wear operation;
an onboard transmission unit provided in the vehicle and configured to transmit the state quantity data acquired by the onboard acquisition unit to a data acquisition roadside device installed on the road;
an abnormality determination unit configured to determine whether or not the state quantity data is abnormal; and
a management device including:
a data acquisition unit configured to acquire the state quantity data from the data acquisition roadside device;
a data storage unit configured to store the state quantity data acquired by the data acquisition unit; and
a data distribution unit configured to distribute the state quantity data determined as abnormal by the abnormality determination unit.

### Claim 2 (depends on 1)

The collision avoidance system according to claim 1, wherein:
the data distribution unit is configured to distribute the state quantity data to a data transmission roadside device installed on the road; and
the state quantity data is transmitted via the data transmission roadside device to at least one of a preceding vehicle traveling in front of the vehicle and a following vehicle traveling behind the vehicle.

### Claim 3 (depends on 2)

The collision avoidance system according to claim 2, wherein:
the management device is configured to:
collect the state quantity data of the pneumatic tires of each of a plurality of vehicles that has passed a predetermined location of the road; and
among the plurality of vehicles, when an abnormal vehicle for which the state quantity data has been determined as abnormal passes the predetermined location again, transmit, to the abnormal vehicle, request data requesting improvement of the pneumatic tire.

### Claim 4 (depends on 3)

The collision avoidance system according to claim 3, wherein:
the management device is configured to transmit analysis data on the state quantity data collected in a predetermined period to the abnormal vehicle.

### Claim 5 (depends on 4)

The collision avoidance system according to claim 4, wherein:
the vehicle travels in accordance with a dispatch order; and
the data distribution unit is configured to distribute the state quantity data to a command device configured to issue the dispatch order.

### Claim 6 (depends on 5)

The collision avoidance system according to claim 5, wherein:
the management device is configured to:
collect the state quantity data of the pneumatic tires of each of a plurality of vehicles to which dispatch orders are issued by the command device; and
distribute the analysis data on the state quantity data that has been collected to the command device.

### Claim 7 (depends on 6)

The collision avoidance system according to claim 6, wherein the state quantity includes an amount of wear of the pneumatic tire,
the collision avoidance system further comprising:
a following vehicle acquisition unit provided in the following vehicle traveling behind the vehicle and configured to acquire amount of wear data indicating the amount of wear of the pneumatic tire of the vehicle; and
a following vehicle transmission unit provided in the following vehicle and configured to transmit the amount of wear data acquired by the following vehicle acquisition unit to the data acquisition roadside device;
wherein
the abnormality determination unit is configured to determine whether or not the amount of wear data is abnormal, and
the data distribution unit is configured to distribute the amount of wear data determined as abnormal by the abnormality determination unit to at least one of the vehicle and a second following vehicle traveling behind the following vehicle.

### Claim 8 (depends on 7)

The collision avoidance system according to claim 7, wherein:
the pneumatic tire includes a first mark provided on a surface of a tread portion that comes into contact with a road surface, and a second mark embedded in tread rubber of the tread portion; and
the following vehicle acquisition unit includes a camera configured to acquire images of the first mark and the second mark, and is configured to estimate the amount of wear of the pneumatic tire on the basis of image data representing the acquired images.

### Claim 9 (depends on 1)

The collision avoidance system according to claim 1, wherein:
the management device is configured to:
collect the state quantity data of the pneumatic tires of each of a plurality of vehicles that has passed a predetermined location of the road; and
among the plurality of vehicles, when an abnormal vehicle for which the state quantity data has been determined as abnormal passes the predetermined location again, transmit, to the abnormal vehicle, request data requesting improvement of the pneumatic tire.

### Claim 10 (depends on 9)

The collision avoidance system according to claim 9, wherein:
the management device is configured to transmit analysis data on the state quantity data collected in a predetermined period to the abnormal vehicle.

### Claim 11 (depends on 1)

The collision avoidance system according to claim 1, wherein:
the vehicle travels in accordance with a dispatch order; and
the data distribution unit is configured to distribute the state quantity data to a command device configured to issue the dispatch order.

### Claim 12 (depends on 11)

The collision avoidance system according to claim 11, wherein:
the management device is configured to:
collect the state quantity data of the pneumatic tires of each of a plurality of vehicles to which dispatch orders are issued by the command device; and
distribute analysis data on the state quantity data that has been collected to the command device.

### Claim 13 (depends on 1)

The collision avoidance system according to claim 1,
the state quantity including an amount of wear of the pneumatic tire,
the collision avoidance system comprising:
a following vehicle acquisition unit provided in the following vehicle traveling behind the vehicle and configured to acquire amount of wear data indicating the amount of wear of the pneumatic tire of the vehicle; and
a following vehicle transmission unit provided in the following vehicle and configured to transmit the amount of wear data acquired by the following vehicle acquisition unit to the data acquisition roadside device;
wherein
the abnormality determination unit is configured to determine whether or not the amount of wear data is abnormal, and
the data distribution unit is configured to distribute the amount of wear data determined as abnormal by the abnormality determination unit to at least one of the vehicle and a second following vehicle traveling behind the following vehicle.

### Claim 14 (depends on 13)

The collision avoidance system according to claim 13, wherein:
the pneumatic tire includes a first mark provided on a surface of a tread portion that comes into contact with a road surface, and a second mark embedded in tread rubber of the tread portion; and
the following vehicle acquisition unit includes a camera configured to acquire images of the first mark and the second mark, and is configured to estimate the amount of wear of the pneumatic tire on the basis of image data representing the acquired images.

### Claim 15

A collision avoidance system, comprising:
an onboard acquisition unit provided in a vehicle traveling on a road and configured to acquire state quantity data indicating a state quantity of a pneumatic tire of the vehicle, the state quantity including an amount of wear of the pneumatic tire, and the pneumatic tire including: a first mark provided on a surface of a tread portion that comes into contact with a road surface, and a second mark embedded in tread rubber of the tread portion;
an onboard transmission unit provided in the vehicle and configured to transmit the state quantity data acquired by the onboard acquisition unit to a data acquisition roadside device installed on the road;
an abnormality determination unit configured to determine whether or not the amount of wear is abnormal; and
a management device including:
a data acquisition unit configured to acquire the state quantity data from the data acquisition roadside device;
a data storage unit configured to store the state quantity data acquired by the data acquisition unit;
a data distribution unit configured to distribute the state quantity data determined as abnormal by the abnormality determination unit;
a following vehicle acquisition unit provided in a following vehicle traveling behind the vehicle and configured to acquire amount of wear data indicating the amount of wear of the pneumatic tire of the vehicle, the following vehicle acquisition unit including a camera configured to acquire images of the first mark and the second mark, and is configured to estimate the amount of wear of the pneumatic tire on the basis of image data representing the acquired images; and
a following vehicle transmission unit provided in the following vehicle and configured to transmit the amount of wear data acquired by the following vehicle acquisition unit to the data acquisition roadside device;
wherein the data distribution unit is configured to distribute the amount of wear data determined as abnormal by the abnormality determination unit to at least one of the vehicle and a second following vehicle traveling behind the following vehicle.