# US 2014/0195141 A1 · Driving assistance device

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- Number: US 2014/0195141 A1
- Document ID: US20140195141A1
- Status: Published application
- Kind: A1
- Application number: 14/237,477
- Filed: 2011-08-10
- Published: 2014-07-10
- Earliest claimed: 2011-08-10
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Inventors: Shinichi Nagata
- Web page: https://patentgrep.com/patent/US20140195141A1

## CPC

- G08G 1/166: {for active traffic, e.g. moving vehicles, pedestrians, bikes}
- B60T 7/22: initiated by contact of vehicle, e.g. bumper, with an external object, e.g. another vehicle {, or by means of contactless obstacle detectors mounted on the vehicle}
- B60W 30/09: Taking automatic action to avoid collision, e.g. braking and steering
- B60W 30/0953: {the prediction being responsive to vehicle dynamic parameters}
- B60W 30/0956: {the prediction being responsive to traffic or environmental parameters}
- B60W 30/18154: {Approaching an intersection}
- B60T 2210/34: Blind spots
- B60W 10/184: with wheel brakes
- B60W 30/095: Predicting travel path or likelihood of collision
- B60W 2552/00: Input parameters relating to infrastructure
- B60W 2554/00: Input parameters relating to objects
- B60W 2554/4041: Position
- B60W 2720/10: Longitudinal speed
- 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})
- 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
- B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT

## Abstract

A driving assistance device includes a blind spot recognition unit that recognizes a blind spot of a driver; a mobile object information setting unit that sets mobile object information; a speed zone computation unit that computes a speed zone of the host vehicle; a brake avoidance condition computation unit that computes at least one condition of a brake avoidance condition so that the host vehicle can avoid contact with the mobile object using a brake of the host vehicle and a brake avoidance condition so that the mobile object can avoid contact with the host vehicle using a brake of the mobile object; a speed zone correction unit that corrects the speed zone, based on the brake avoidance condition computed by the brake avoidance condition computation unit; and a target speed computation unit that computes a target speed of the host vehicle based on the speed zone.

## Claims

### Claim 1

A driving assistance device comprising:
a blind spot recognition unit that recognizes a blind spot of a driver in a progressing direction of a host vehicle;
a mobile object information setting unit that sets mobile object information including at least an assumed speed of a mobile object, as information on the mobile object having a possibility of appearing suddenly from the blind spot;
a speed zone computation unit that computes a speed zone of the host vehicle having a possibility that the host vehicle will come into contact with the mobile object when progressing in the progressing direction, based on the mobile object information set by the mobile object information setting unit;
a brake avoidance condition computation unit that computes at least one condition of a brake avoidance condition that the host vehicle can avoid contact with the mobile object using a brake of the host vehicle and a brake avoidance condition that the mobile object can avoid contact with the host vehicle using a brake of the mobile object;
a speed zone correction unit that corrects the speed zone based on the brake avoidance condition computed by the brake avoidance condition computation unit; and
a target speed computation unit that computes a target speed of the host vehicle based on the speed zone,
wherein the speed zone computation unit computes the speed zone by computing a condition that the mobile object can pass earlier than at least the host vehicle, based on the assumed speed of the mobile object.

### Claim 2 (depends on 1)

The driving assistance device according to claim 1, wherein the speed zone correction unit corrects the speed zone by removing a zone satisfying the brake avoidance condition from the speed zone.

### Claim 3 (depends on 1)

The driving assistance device according to claim 1, wherein the brake avoidance condition computation unit computes the brake avoidance condition of the mobile object, based on the surrounding environment of the blind spot.