JP2018144546A - Device for assisting brake after collision - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve safety after a vehicle collision.SOLUTION: A device for assisting brake after collision comprises: a determining section 11 that determines whether a driver is in an improper state of driving, which affects a driving operation; a collision detecting section 12 that detects a collision of the vehicle; and a brake control section 13 that, in a case where the collision of the vehicle is detected by a collision detecting section 12, causes the vehicle to apply brake force regardless of the presence or absence of a brake operation. The brake control section 13 makes specific brake force when the determining section 11 determines that the driver is in the improper state of driving, greater than specific brake force when the determining section determines that the driver is not in the improper state of driving.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a post-collision braking assist device.

  Patent Document 1 below discloses a vehicle control device that generates braking force on a vehicle according to whether or not an airbag is deployed at the time of a vehicle collision. This vehicle control device makes the braking force when the airbag is deployed larger than the braking force when the airbag is not deployed.

  In general, when the airbag does not deploy at the time of a vehicle collision, it is often in a state where the driver can perform a driving operation as compared with the case where the airbag is deployed. In view of such circumstances, in Patent Document 1, if the airbag does not deploy at the time of a vehicle collision, the braking force is reduced as compared with when the airbag is deployed, and the driver can retreat to a safe place. An avoidance operation can be performed.

Japanese Unexamined Patent Publication No. 2016-2908

  However, even if the airbag is not deployed at the time of a vehicle collision, the driver may be unable to perform a driving operation normally. In such a case, there is a possibility that the driver cannot perform the avoidance operation.

  Therefore, an object of the present invention is to provide a post-collision braking support device that can improve safety after a vehicle collision.

  A post-collision braking support device according to an aspect of the present invention includes a state determination unit that determines whether or not a driver driving a vehicle corresponds to a driving inappropriate state that hinders driving operation, and a vehicle collision. A collision detection unit for detecting, and a braking control unit for generating a predetermined braking force on the vehicle regardless of whether or not a brake operation is performed when a collision of the vehicle is detected by the collision detection unit, the braking control unit Is greater than the braking force when the driver determines that the driver does not correspond to the driving inappropriate state when the driver determines that the driver corresponds to the driving inappropriate state. Enlarge.

  ADVANTAGE OF THE INVENTION According to this invention, the braking assistance apparatus after a collision which can improve the safety after a vehicle collision can be provided.

1 is a diagram illustrating a schematic configuration of a vehicle system including a post-collision braking support device according to an embodiment. 2 is a flowchart for explaining an example of the operation of the vehicle system shown in FIG. 1.

  A preferred embodiment of the present invention will be described with reference to the accompanying drawings. In addition, in each figure, what attached | subjected the same code | symbol has the same or similar structure.

  With reference to FIG. 1, a configuration of a vehicle system including a post-collision braking support device according to the embodiment will be described. The vehicle system 100 includes, for example, a control device 1, a handle 2, an accelerator pedal 3, a brake pedal 4, an airbag 5, a handle sensor 6, an accelerator sensor 7, a brake sensor 8, and a collision detection sensor 9. The control device 1 is a computer system for controlling the components mounted on the vehicle in an integrated manner.

  The control device 1 includes, for example, a determination unit (state determination unit, deployment determination unit) 11, a collision detection unit 12, a brake control unit (braking control unit) 13, an airbag control unit 14, a storage unit 15, and a communication unit 16. . Among these constituent elements of the control device 1, at least the determination unit 11, the collision detection unit 12, and the brake control unit 13 constitute a post-collision braking support device. Note that the components of the post-collision braking assistance device are not limited to this, and arbitrary components can be added as necessary.

  The control device 1 is configured by a control unit including a CPU (Central Processing Unit) and a memory, for example. The control device 1 may be configured by a single control unit or may be configured by a plurality of control units.

  The storage unit 15 stores various programs and various information necessary for execution of processing in the control device 1 in a memory. The communication unit 16 is a communication interface for communicating with an external device.

  The control device 1 realizes the functions of the determination unit 11, the collision detection unit 12, the brake control unit 13, and the airbag control unit 14, for example, when the CPU executes a predetermined program stored in the memory. Each function will be described below.

  The determination part (state determination part) 11 determines whether the driver who drives a vehicle corresponds to a driving inappropriate state. The driving inappropriate state is a state where the driver is hindering the driving operation.

  Specifically, the determination unit 11 determines that the vehicle is in an inappropriate driving state when a predetermined time has elapsed in a state where the driver is suspected of having an abnormality. For example, the state in which the abnormality is suspected includes a state in which the driver has released the steering wheel, a state in which the driver does not perform the accelerator operation and the brake operation, and a state in which the driver continues to operate the accelerator. is there.

  Whether or not the driver has released the steering wheel can be determined by a signal output from the steering wheel sensor 6. The handle sensor 6 outputs, for example, a signal indicating that the handle is being gripped when the driver is gripping the handle 2, and the handle is being gripped when the driver is not gripping the handle 2. Outputs a signal indicating no

  Whether or not the driver does not perform the accelerator operation and the brake operation can be determined based on signals output from the accelerator sensor 7 and the brake sensor 8. The accelerator sensor 7 outputs a signal indicating that the accelerator operation is being performed, for example, when the driver depresses the accelerator pedal 3, and the accelerator operation is performed when the driver does not depress the accelerator pedal 3. A signal indicating that is not performed is output.

  The brake sensor 8 outputs, for example, a signal indicating that the brake operation is being performed when the driver depresses the brake pedal 4, and the brake operation is performed when the driver does not depress the brake pedal 4. A signal indicating that is not performed is output.

  Whether or not the driver continues the accelerator operation can be determined by a signal output from the accelerator sensor 7.

  The determination unit (deployment determination unit) 11 determines whether or not the airbag 5 has been deployed.

  The collision detection unit 12 detects a vehicle collision. Specifically, whether or not the vehicle has collided can be determined by a signal output from the collision detection sensor 9. When the collision detection sensor 9 detects a collision, the collision detection sensor 9 outputs a collision detection signal including a value indicating the magnitude of the collision.

  The brake control unit 13 generates a braking force on the vehicle according to the operation amount of the brake pedal 4. The operation amount of the brake pedal 4 can be calculated from a signal output from the brake sensor 8.

  When the collision detection unit 12 detects a vehicle collision, the brake control unit 13 causes the vehicle to generate a predetermined braking force regardless of whether or not a brake operation is performed.

  For example, the predetermined braking force is set to be larger when the driver is in a driving inappropriate state than when the driver is not in a driving inappropriate state. Specifically, when the driver is in an inappropriate driving state, a braking force that completely stops the vehicle is generated, and when the driver is not in an inappropriate driving state, the vehicle is decelerated to a slow speed (for example, about 10 km / h). Generate braking force.

  The predetermined braking force can be set to a different magnitude depending on whether or not the airbag 5 is deployed at the time of a vehicle collision. For example, when the airbag 5 is deployed, the predetermined braking force may be increased compared to when the airbag 5 is not deployed. For example, when the driver is not in a driving inappropriate state and the airbag 5 is not deployed, the predetermined braking force may not be generated.

  In addition to generating a predetermined braking force depending on whether or not the airbag 5 is deployed at the time of a vehicle collision, other processing may be added. For example, when the driver is unsuitable for driving and the airbag 5 is not deployed, in addition to generating a predetermined braking force, emergency notification may be made using HELPNET. HELPNET is a service that sends the current position of a vehicle to the operation center in the event of an accident or sudden illness, and makes an emergency call to the nearest police station, fire department, or the like.

  The airbag control unit 14 deploys the airbag 5 according to the magnitude of the collision. The magnitude of the collision can be determined by a collision detection signal output from the collision detection sensor 9.

  Specifically, the airbag control unit 14 deploys the airbag when the value included in the collision detection signal is equal to or greater than a threshold value. The threshold value can be appropriately set by repeatedly conducting experiments and the like in consideration of safety at the time of collision.

  Next, an example of the operation of the vehicle system 100 in the embodiment will be described with reference to FIG. The processing procedure of FIG. 2 is executed every time the vehicle starts traveling.

  First, the determination unit 11 determines whether or not the driver driving the vehicle corresponds to a driving inappropriate state (step S101). If this determination is NO (step S101; NO), the process proceeds to step S106 described later.

  When it is determined in step S101 that the driver is in a driving inappropriate state (step S101; YES), the collision detection unit 12 determines whether a vehicle collision is detected (step S102). If this determination is NO (step S102; NO), the process of step S102 is repeatedly executed.

  If a vehicle collision is detected in step S102 (step S102; YES), the brake control unit 13 determines whether the airbag 5 has been deployed (step S103). If this determination is YES (step S103; YES), the brake control unit 13 generates a braking force that completely stops the vehicle (step S104). Then, this processing procedure ends.

  When it is determined in step S103 that the airbag 5 is not deployed (step S103; NO), the brake control unit 13 generates a braking force for completely stopping the vehicle, and uses HELPNET to make an emergency call. (Step S105). Then, this processing procedure ends.

  On the other hand, when it is determined in step S101 that the driver does not correspond to the driving inappropriate state (step S101; NO), the collision detection unit 12 determines whether a vehicle collision is detected (step S101). S106). If this determination is NO (step S106; NO), the process proceeds to step S101.

  When a vehicle collision is detected in step S106 (step S106; YES), the brake control unit 13 determines whether the airbag 5 has been deployed (step S107). When this determination is YES (step S107; YES), the brake control unit 13 generates a braking force that decelerates the vehicle to the slow speed (step S108). Then, this processing procedure ends.

  When it is determined in step S107 that the airbag 5 has not been deployed (step S107; NO), this processing procedure ends.

  As described above, according to the vehicle system 100 in the embodiment, it is possible to determine whether or not the driver corresponds to a driving inappropriate state, and to detect a vehicle collision, and when a vehicle collision is detected. In addition, a predetermined braking force can be generated in the vehicle regardless of whether or not a brake operation is performed, and the braking force when the driver is determined to be in a driving inappropriate state is determined by the driver as the predetermined braking force. It can be made larger than the braking force when it is determined that it does not correspond to the driving inappropriate state.

  As a result, when a collision of the vehicle is detected when the driver falls into an inappropriate driving state, a relatively large braking force can be generated in the vehicle. The vehicle can be safely stopped. On the other hand, if a collision of the vehicle is detected when the driver does not fall into the inappropriate driving state, the vehicle should generate a braking force that is smaller than that in the inappropriate driving state or not generate the braking force. Therefore, it is possible to facilitate the avoidance operation by the driver.

  Therefore, according to the vehicle system 100 in the embodiment, safety after a vehicle collision can be improved.

  Further, according to the vehicle system 100 in the above-described embodiment, it can be further determined whether or not the airbag 5 has been deployed, and the airbag 5 has been deployed when the driver does not fall into an inappropriate driving state. The braking force when it is determined can be made larger than the braking force when it is determined that the airbag 5 has not been deployed.

  Accordingly, when a collision of the vehicle is detected when the driver does not fall into the inappropriate driving state, when the airbag 5 is deployed, a relatively large braking force can be generated on the vehicle. When the vehicle does not deploy, it is possible to generate a braking force smaller than that when the vehicle is deployed or not to generate a braking force.

  The present invention is not limited to the above-described embodiment, and can be implemented in various other forms without departing from the gist of the present invention. For this reason, the said embodiment is only a mere illustration in all points, and is not interpreted limitedly. For example, the above-described processing steps can be arbitrarily changed in order as long as the processing contents do not contradict each other, or can be executed in parallel.

DESCRIPTION OF SYMBOLS 1 ... Control apparatus 2 ... Handle 3 ... Accelerator pedal 4 ... Brake pedal 5 ... Air bag 6 ... Handle sensor 7 ... Accelerator sensor 8 ... Brake sensor 9 ... Collision detection sensor 11 ... Determination part 12 ... Collision detection part 13 ... Brake control part 14 ... Airbag control unit 15 ... Storage unit 16 ... Communication unit 100 ... Vehicle system

Claims (1)

A state determination unit that determines whether or not the driver driving the vehicle falls under a driving inappropriate state that hinders the driving operation;
A collision detection unit for detecting a vehicle collision;
A braking control unit for generating a predetermined braking force on the vehicle regardless of the presence or absence of a brake operation when a collision of the vehicle is detected by the collision detection unit;
With
The braking control unit is configured to determine the braking force when the driver determines that the driver corresponds to the driving inappropriate state by the state determination unit, and the braking force when the driver determines that the driver does not correspond to the driving inappropriate state. Larger than braking force,
Braking assist device after collision.