JPH06234342A - Collision time centralized control device - Google Patents

Abstract

PURPOSE:To enable the ideal execution of secondary accident prevention and the like at the collision time of a vehicle. CONSTITUTION:When acceleration Gx, Gy are detected by a two-dimensional G-sensor 10, an ECU 20 computes the absolute value and direction of acceleration and put various systems selectively in action on the basis of the computed result. The systems to be the action objects include a front collision air bag 22 for a driver's seat, a front collision air bag 24 for a front passengers seat, a side collision air bag 26 for the driver's seat, a side collision air bag 28 for the front passengers seat, an automatic fire extinguishing appliance 30, a power cut-off device 32, an accident reporting device 34, a preloader seat belt 36, an automatic brake 38 and a door lock release device 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centralized control system for a collision which detects a collision of a vehicle and operates a system such as an airbag.

[0002]

2. Description of the Related Art In recent years, systems such as airbags have been mounted on vehicles in order to protect a driver or the like in the event of a vehicle collision. That is, when a vehicle collision is detected by an acceleration sensor (G sensor) or the like, the inflator is ignited and the generated gas is introduced into the airbag. This inflates the airbag provided on the steering wheel,
The operator will be protected from the impact of the collision.

The applicant of the present application has previously proposed a control device for controlling the operation of the airbag system according to the output of a sensor such as a G sensor (Japanese Patent Application No. 4-227904). In this system, a sensor that two-dimensionally detects the acceleration applied to the vehicle is used. Therefore, not only the magnitude of acceleration but also the direction can be detected. Based on the magnitude and direction of the acceleration thus detected, the front collision airbag, the side collision airbag, or the like can be selectively operated. As a result, it is possible to more appropriately protect the driver of the vehicle from the impact of a collision.

[0004]

However, in this system, the airbag is only operated in accordance with a collision of the vehicle, and a further comprehensive comprehensive measure such as preventing the occurrence of a secondary disaster is taken. Cannot be carried out.

The present invention has been made to solve the above problems, and an object of the present invention is to make it possible to implement more advanced countermeasures for collisions, including prevention of secondary disasters.

[0006]

In order to achieve such an object, a centralized control system for collision of the present invention comprises a sensor for detecting a collision of a vehicle and its direction, and a plurality of on-vehicle collisions based on the detection results. And a control means for selectively operating the time countermeasure system, wherein the collision countermeasure system is arranged in front of the vehicle occupant and deployed in response to a signal from the control means, and a side surface of the vehicle occupant. And a side impact airbag that is deployed in response to a signal from the control means, and an automatic fire extinguisher that operates in response to a signal from the control means and operates in the event of a fire in the engine room to extinguish the fire. , A power cutoff device that cuts off power supplies other than a predetermined device that should be operated after a collision in response to a signal from the control means, and notifies the fact of the collision to the outside in response to a signal from the control means A late notification device, a preloader seat belt that holds the posture of the vehicle occupant in response to a signal from the control means, an automatic brake that brakes the vehicle in response to a signal from the control means, and a door lock in response to a signal from the control means. And a door lock releasing device for releasing the door.

[0007]

In the present invention, various on-vehicle collision countermeasure systems are provided based on the magnitude and direction of the acceleration associated with a collision.
The operation can be selectively performed as appropriate. That is, if the operation content of the control means is to deploy the front collision airbag when a front collision occurs, the vehicle occupant will be protected from the impact due to the front collision when the front collision occurs. Further, when the operation content of the control means is the control content for deploying the side collision airbag at the time of a side collision, the vehicle occupant is protected from the impact due to the side collision when the side collision occurs. In addition, depending on the direction of the collision, a fire may occur in the engine room, etc. Therefore, if the control content of the control means is set to operate the automatic fire extinguisher at the time of the collision, it may cause a fire due to the collision. Secondary disasters can be prevented. In addition, by cutting off power supplies other than necessary devices, it is possible to preferably prevent a fire or an electric accident. Furthermore, if an accident notification device is used to notify the fact of a collision to the outside, it is possible to provide assistance in response to this, and if the automatic brake is activated, it is possible to prevent a secondary collision and unlock the door. If the device is operated, the occupants of the vehicle can be quickly evacuated and rescued. Thus, in the present invention,
It is possible to suitably prevent and take measures against various obstacles associated with vehicle collisions, including secondary disasters.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of a system according to an embodiment of the present invention. As shown in this figure, in the present embodiment, G that two-dimensionally detects the acceleration applied to the vehicle.
The sensor 10 is provided. The G sensor is, for example, as shown in FIG.
As shown in (a), two cantilevers 14 and 16 may be provided on the semiconductor substrate 12 so as to form a predetermined angle. In the fragile parts of the cantilevers 14 and 16,
Although not shown, a strain detecting means such as a piezoresistor is provided, and the acceleration can be two-dimensionally detected as strain, as indicated by the direction of the arrow in the figure. Single board 1
Instead of providing the two cantilevers 14 and 16 on 2, the G sensor related to each cantilever 14 and 16 is individually prepared, and this is mounted on the substrate 18 as shown in FIG. 2B. It may be configured so as to be mounted at a predetermined angle.

The system shown in FIG. 1 includes a G sensor 10
Based on the output of E
It has a CU20. That is, the x-direction component G _x and the y-direction component G of the acceleration detected by the G sensor 10
Based on _y , the ECU 20 determines that the front airbag 2 in the cockpit is
2. Front collision airbag 24 in the passenger seat, side collision airbag 26 in the pilot's seat, side collision airbag 28 in the passenger seat, automatic fire extinguishing device 30, power shutoff device 32, accident notification device 34, preloader seat belt 36, The automatic brake 38 and the door lock release device 40 are selectively operated. In addition, the ECU 20
While monitoring the output of the G sensor 10, while monitoring the outputs of the vehicle speed sensor 42, the yaw rate sensor 44, and the front monitoring camera 46, the drive recorder 48 records the vehicle operation status.

The ECU 20, as shown in FIG.
The accelerations Gx and Gy detected by the sensor 10 are monitored, their absolute values | G | and the direction θ are determined, and each system is selectively operated according to these values.

First, the ECU 20 inputs the outputs Gx and Gy of the G sensor 10 (100). Next, the ECU 20
Calculates the absolute value of acceleration | G | = (Gx ² + Gy ² ) ^1/2 (102). When the absolute value | G | of the acceleration obtained as a result of this calculation is larger than the predetermined threshold value Thmin (104), the ECU 20 shifts to the collision operation after step 106, and when it is not large, returns to the main routine. .

In step 106, the ECU 20
Calculates the acceleration direction θ = tan ⁻¹ (G _y / G _x ). Based on the direction θ obtained as a result of this calculation, the ECU
20 determines whether it is a frontal collision, a side collision, or a rearward collision (108). If the result of this determination is that there is a front collision, the ECU 20 proceeds to step 110 and executes a determination regarding the absolute value | G | of acceleration. ECU 20
Shifts to a collision control operation for selectively operating each system according to the result of the determination in step 110 (112). That is, as shown in Table 1, at the time of a frontal collision, the frontal collision airbags 22 and 24, the automatic fire extinguisher 3
0, the power cutoff device 32, the accident notification device 34, the preloader seat belt 36, the automatic brake 38, and the door lock release device 40 are activated in step 112. At that time, the ECU 20 determines that the absolute value of acceleration | G | Start only the system you need, depending on the value.

As shown in FIG. 4, the front collision airbag 22 for the pilot seat is on the steering wheel 50, the front collision airbag 24 for the front passenger seat is on the instrument panel, and the side collision airbag for the pilot seat is shown. The bag 26 is provided on the door on the right side of the vehicle, the side airbag 28 for the passenger seat is provided on the door on the left side of the vehicle, and the preloader seat belt 36 is provided on the seat of the rear seat or the like. The automatic fire extinguisher 30 is provided in a place where a fire is likely to occur, such as an engine room. Other systems, for example, the power cutoff device 32, the accident notification device 34, the automatic brake 38, and the door lock release device 40 are provided at suitable locations.

What is activated in step 112 is
A system required for a frontal collision, for example, a frontal collision airbag 22 and 24, an automatic fire extinguishing device 30, a power shutoff device 32, an accident notification device 34, a preloader seat belt 36, an automatic brake 38 and a door lock as shown in Table 1. Release device 4
It is 0. Further, in step 112, of these systems, for example, a system that should not be activated when the absolute value of acceleration | G | is small is not activated. Thus, in step 112, as a result, each system is selectively activated based on the absolute value of acceleration | G | and the direction θ.

[0016]

[Table 1] If it is determined in step 108 that a side collision has occurred, steps 114 and 116 are executed. Steps 114 and 116 are the same as steps 110 and 112 described above.
Similarly to the above, it is a step related to the determination regarding the absolute value | G | of the acceleration and the selective collision control operation. Step 116
As shown in Table 1 above, the side airbags 26 and 28, the power shutoff device 32, and
An accident notification device 34, a preloader seat belt 36, an automatic brake 38, and a door lock release device 40. Of course, the automatic fire extinguishing device 30 may be operated, but since the automatic fire extinguishing device 34 is usually a device for extinguishing a fire in the engine room of the entire vehicle, it is not necessary to activate it in a side collision. Often. Further, depending on the absolute value | G | of the acceleration, any one of the systems shown in Table 1 may be arbitrarily activated or may not be activated.

If it is determined in step 108 that a rear collision has occurred, steps 118 and 120 are executed. Step 118 is a determination related to the absolute value of acceleration | G |, and step 120 is a selective collision control operation.
As shown in Table 1 above, the power cutoff device 32 and the accident notification device 3 are activated in step 120.
4, a preloader seat belt 36, an automatic brake 38, and a door lock release device 40. Further, the automatic fire extinguisher 30 may be operated. Also in step 120, selective activation is performed according to the absolute value of acceleration | G |.

After executing step 112, 116 or 120, step 122 is executed. That is, the ECU
Reference numeral 20 determines whether or not a reset switch (not shown) is turned on. If the reset switch is not turned on, it is necessary to repeatedly execute the operation shown in FIG. 3 and continue the countermeasure against collision, so the process proceeds to step 100. If the reset switch is pressed, for example,
In order to transport and move the accident vehicle to a repair shop, etc., execute processing to restore only the minimum necessary functions (1
24). After this, the process returns to the main routine.

Next, the outline of the contents of each system relating to measures against collision will be described.

The front collision airbags 22 and 24 are provided in front of the driver's seat or the passenger seat, as described above. For example, when a front collision occurs, a signal is supplied from the ECU 20 to these front collision airbags 22 and 24. In the front collision airbags 22 and 24, the inflator is ignited in response to this signal. Then, gas is generated, which causes the front collision airbags 22 and 24 to deploy. Due to this development, a person sitting in the driver's seat or the passenger seat of the vehicle is preferably protected from the impact due to the frontal collision.

The side-impact airbags 26 and 28 have the same structure as the front-impact airbags 22 and 24.
However, the airbags 26 and 28 differ from the front collision airbags 22 and 24 in that they are deployed when the ECU 20 determines that a side collision has occurred.

The automatic fire extinguisher 30 is arranged, for example, in an engine room or the like. The automatic fire extinguisher 30 may be operated at the same time as another device, for example, the power cutoff device 32.
For example, the power cutoff device 32 may be operated first to stop the fuel supply to the engine, and then the operation of the automatic fire extinguishing device 30 may be started. Further, since the automatic fire extinguishing device 30 needs to operate even after the power cutoff device 32 has operated, it must be excluded from the target of power cutoff by the power cutoff device 32.

The power shutoff device 32 is a circuit that shuts off the power, except for the system to which power should be supplied even after a collision. The automatic fire extinguishing device, the door lock releasing device 40, etc. may be excluded from the target of power shutoff, for example, the power shutoff timing may be delayed. This interruption is performed, for example, by a power cut relay or the like provided in the latter stage of the battery.

The accident reporting device 34 is a device that reports the occurrence of an accident to the accident center through, for example, a mobile phone line in response to a command from the ECU 20. Accident reporting device 34
It is preferable to be able to make this notification manually.

The preloader seat belt 36 is a device for maintaining the posture of the vehicle occupant and reducing obstacles in the event of a vehicle collision. Therefore, for example, it is preferable to provide the back seat, particularly the shoulder thereof.

The automatic brake 38 blinks a brake lamp (not shown) and operates the brake in response to the supply of the control signal from the ECU 20. This prevents secondary collisions.

The door lock releasing device 40 is a device for automatically releasing the door lock at the time of a collision so that the operator or the like can rescue the operator or the like from outside or inside the vehicle.

The drive recorder 48 includes a G sensor 10,
It is a device that records the traveling state of the vehicle based on the outputs of the vehicle speed sensor 42, the yaw rate sensor 44, the front monitoring camera 46, and the like. By providing such a drive recorder 48, it is possible to analyze what kind of situation or cause caused the accident, and it is suitable for a countermeasure against the occurrence of the accident later. At that time, since only one control means such as an ECU is required, the device configuration is simple and the development and manufacturing costs are low.

[0029]

As described above, according to the present invention,
Since a collision of a vehicle and its direction are detected and a plurality of collision countermeasure systems are selectively operated according to the detection result, it is possible to execute suitable collision countermeasures including prevention of secondary disasters. .

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a system according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an example configuration of a G sensor used in this embodiment.

FIG. 3 is a flowchart showing a flow of operation of an ECU in this embodiment.

FIG. 4 is a diagram showing an arrangement of a collision countermeasure system and a collision direction in this embodiment.

[Explanation of symbols]

10 G sensor 20 ECU 22 Front collision airbag for cockpit 24 Front collision airbag for passenger seat 26 Side collision airbag for passenger seat 28 Side collision airbag for passenger seat 30 Automatic fire extinguishing device 32 Power shutoff device 34 Accident notification device 36 Pre-loader seat belt 38 Automatic brake 40 Door lock release device 42 Vehicle speed sensor 44 Yaw rate sensor 46 Front monitoring camera 48 Drive recorder G _x , G _y Acceleration | G | Acceleration absolute value θ Acceleration direction

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B60R 22/46 9253-3D B60T 7/12 D 9237-3H

Claims (1)

[Claims] 1. A sensor for detecting a collision of a vehicle and its direction, and a control means for selectively operating a plurality of collision countermeasure systems mounted on a vehicle based on the detection result, wherein the collision countermeasure system is a vehicle A front collision airbag which is arranged in front of the passenger and deploys in response to a signal from the control means, a side collision airbag which is arranged on a side surface of the vehicle passenger and deploys in response to a signal from the control means, and a signal from the control means In response to the signal from the control means, the automatic fire extinguishing device that operates when a fire occurs in the engine room etc. and extinguishes it in response to the signal from the control device Power cut-off device that shuts off the vehicle, an accident notification device that reports the fact of a collision to the outside in response to a signal from the control unit, and a pre-maintainer that maintains the posture of the vehicle occupant in response to the signal from the control unit. In the event of a collision, the loader seat belt, an automatic brake that brakes the vehicle in response to a signal from the control means, and a door lock release device that unlocks the door in response to the signal from the control means. Centralized control device.