JP2001106020A - Device and method for judgment of impact configuration and starter of air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly and accurately judge whether the configuration of impact of a vehicle is soft crash or not. SOLUTION: The moving average value Gave of the decelerations detected by a floor sensor disposed near a center console of a vehicle and the time differential value dGave of the moving average value Gave are calculated, and locus of the moving average values Gave against the time differential values dGave is plotted. Based on the first peak value Gmax of the moving average value Gave of the locus with respect to an axis, a threshold value Gupper as a boundary between a frontal impact and soft crash is set up, and a threshold value Glower as a boundary between a rough terrain running and soft crash is set up. When the first minimum value Gact of the locus is located between the threshold values Gupper and Glower, the configuration of impact of the vehicle is judged to be the soft crash.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for determining a collision type and an activation device for an airbag device. More specifically, the present invention relates to a collision type determination apparatus for determining whether a vehicle collision is a soft crash. The present invention relates to a determination method and an activation device that activates an airbag device having a plurality of inflators and capable of selecting an inflation speed.

[0002]

2. Description of the Related Art An occupant protection device such as an airbag device mounted on a vehicle adjusts the activation timing of the occupant protection device based on a temporal change in deceleration detected by a deceleration meter mounted on the vehicle. Is being done.

[0003]

However, the moving direction, moving amount, moving timing, etc. of the occupant at the time of the collision of the vehicle differ depending on the form of the collision. It is difficult to activate a more appropriate occupant protection device at a more accurate timing only by adjusting the activation timing. That is, it has been considered as a problem to determine the type of collision and use the same in order to activate a more appropriate occupant protection device at more accurate timing. As one of the devices to determine the type of collision,
The applicant has determined that a condition in which the rate of change of the deceleration with respect to time detected by a G sensor (floor sensor) disposed near the center of the vehicle is larger than a predetermined lower limit and smaller than a predetermined upper limit, and the deceleration is satisfied. A device that determines that the collision mode of a vehicle is a soft crash when a condition that exceeds a predetermined threshold is satisfied (Japanese Patent Application No. 11-219).
043). The types of collision are classified into symmetrical collision (full lap collision) in which the entire front of the vehicle collides, asymmetrical collision (offset collision) in which one side of the front of the vehicle collides, and oblique collision in which the vehicle collides at a predetermined angle. Is done.
Symmetrical collisions include a head-on collision where the entire front of the vehicle collides with a hard object, a pole collision where the approximate center of the front of the vehicle collides with an object as seen in the example of a collision with a pole, and a rear collision such as a truck. It is classified as an underride that crashes into the bottom. Among symmetrical collisions, pole collisions and underrides are called soft crashes. It should be noted that an asymmetrical collision is a collision between a rigid object that does not deform and
They are classified into RBs (Offset Rigid Barriers) and ODBs (Offset Deformable Barriers) that collide with objects to be deformed.

[0004] It is an object of the present invention to determine whether or not a collision mode of a vehicle is a soft crash. Another object of the present invention is to determine a collision mode more accurately. Furthermore, an object of the collision type determination device and the determination method of the present invention is to quickly determine the type of collision.

An object of the present invention is to activate an airbag device at a more appropriate timing when the mode of collision of the vehicle is a soft crash. Another object of the airbag starting device of the present invention is to inflate the airbag at a more appropriate inflation speed.

[0006]

Means for Solving the Problems and Action / Effects Thereof The collision type determination apparatus and determination method of the present invention and the activation device of the airbag apparatus according to the present invention include the following means for at least partially achieving the above-mentioned object. I took it.

A first collision type judging device according to the present invention is a collision type judging device for judging whether the type of collision of a vehicle is a soft crash, and is arranged at a predetermined position of the vehicle to detect deceleration. Deceleration detecting means for detecting a first maximum value of the detected deceleration and a first minimum value after the first maximum value, and a detected minimum value of the first minimum value And a collision type determination unit that determines that the type of collision of the vehicle is a soft crash when is within a predetermined range.

In the first collision type judging device of the present invention, the local maximum value detecting means includes the first local maximum value of the deceleration detected by the deceleration detecting means arranged at a predetermined position of the vehicle and the first maximum value. The first minimum value after the maximum value is detected, and the collision type determination means determines that the type of collision of the vehicle is a soft crash when the detected first minimum value is within a predetermined range. According to the first collision type determination device of the present invention, a soft crash can be determined based on the first minimum value of the deceleration. Moreover, the determination can be made only by the deceleration detected by the deceleration detecting means arranged at a predetermined position of the vehicle.

A second collision judging device according to the present invention is a collision type judging device for judging whether the type of collision of a vehicle is a soft crash, and is disposed at a predetermined position of the vehicle.
Deceleration detecting means for detecting deceleration, differential calculating means for calculating a time differential value of the detected deceleration, and a deceleration axis of a locus of the calculated time differential value with respect to the detected deceleration In contrast, when the first minimum value after passing through the first maximum value is within a predetermined range, a collision type determination unit that determines that the type of collision of the vehicle is a soft crash is provided.

In the second collision type determining apparatus according to the present invention, the differential calculating means calculates a time differential value of the deceleration detected by the deceleration detecting means arranged at a predetermined position of the vehicle, and the collision determining means When the first minimum value after passing through the first maximum value with respect to the axis of the deceleration of the trajectory of the calculated time differential value with respect to the detected deceleration is within a predetermined range, the form of the vehicle collision is It is determined that a soft crash has occurred. According to the second collision type determination device of the present invention, it is possible to determine the soft crash based on the trajectory of the time derivative of the deceleration with respect to the deceleration. Moreover, the determination can be made only by the deceleration detected by the deceleration detecting means arranged at a predetermined position of the vehicle. Further, since the determination is made based on the minimum value of the deceleration of the trajectory with respect to the axis, the determination can be made quickly. The determination based on the minimum value of the deceleration axis of the trajectory with respect to the axis is based on the fact that the minimum value is significantly different between a case where the vehicle is traveling on a rough road, a case where the vehicle is in a head-on collision, and a case where the vehicle is in a soft crash.

In the first or second collision type determining apparatus according to the present invention, the predetermined range includes a first predetermined value for determining that the vehicle is traveling on a rough road and a collision type of the vehicle. The range may be set by a second predetermined value for determining that the vehicle is a head-on collision.

Further, in the first or second collision type judging device of the present invention, the collision type judging means includes the first type.
The information processing apparatus may further include a predetermined range setting unit that sets the predetermined range based on the local maximum value. In the first or second collision mode determination device according to this aspect of the invention, the predetermined range setting means calculates two different predetermined values by multiplying the first local maximum value by two different predetermined coefficients. The means may be a means for setting a range of two predetermined values as a predetermined range.

A first collision type determination method according to the present invention is a collision type determination method for determining whether the type of collision of the vehicle is a soft crash, wherein the first maximum value of the deceleration at a predetermined position of the vehicle is provided. When the first minimum value after is within a predetermined range, it is determined that the form of the collision of the vehicle is a soft crash.

According to the first collision mode determination method of the present invention, a soft crash can be determined based on the first minimum value of the deceleration. Moreover, the determination can be made only by the deceleration at the predetermined position of the vehicle.

A second collision mode determination method according to the present invention is a collision mode determination method for determining whether a vehicle collision mode is a soft crash, wherein the time differential value of the deceleration at a predetermined position of the vehicle is calculated. When the first minimum value after passing through the first maximum value with respect to the axis of the deceleration of the trajectory with respect to the deceleration is within a predetermined range, it is determined that the form of the collision of the vehicle is a soft crash. And

According to the second collision type determination method of the present invention, a soft crash can be determined based on the trajectory of the time differential value of the deceleration with respect to the deceleration. Moreover, the determination can be made only by the deceleration at the predetermined position of the vehicle. Further, since the determination is made based on the minimum value of the deceleration of the trajectory with respect to the axis, the determination can be made quickly. It should be noted that the determination based on the minimum value of the axis of the deceleration of the trajectory is based on the fact that this minimum value is remarkably different between the case where the vehicle is traveling on a rough road, the case of a head-on collision, and the case of a soft crash. This is the same as the second collision type determination device of the present invention.

In the first or second collision type determination method according to the present invention, the predetermined range may be a first predetermined value for determining that the vehicle is traveling on a rough road and a collision type of the vehicle. The range may be set by a second predetermined value for determining that the vehicle is a head-on collision.

In the first or second collision mode judging method according to the present invention, the predetermined range is a range set by two different predetermined values obtained by multiplying the first local maximum value by two different predetermined coefficients. May be used.

The starting device for an airbag device according to the present invention is a starting device for starting an airbag device having a plurality of inflators and capable of selecting an inflation speed. Deceleration detection means for detecting, soft crash determination means for determining whether the form of vehicle collision is a soft crash based on the detected deceleration, and time of deceleration detected by the deceleration detection means Integral expansion means for calculating an integral value; selecting the expansion speed based on the determination by the soft crash determination means, the time integral value calculated by the integration calculation means, and the deceleration detected by the deceleration detection means. Activating means for activating the airbag device.

In the starting device for an airbag device according to the present invention, the soft crash determining means determines the form of the vehicle collision based on the deceleration detected by the deceleration detecting means arranged at a predetermined position of the vehicle. The activation means selects the inflation speed based on the determination by the soft crash determination means, the time integration value calculated by the integration calculation means, and the deceleration detected by the deceleration detection means, Activate the back device. According to such an activation device for an airbag device of the present invention, it is possible to activate the airbag device at an appropriate timing at a more appropriate timing at the time of soft crash.

[0021] In the starting device for an airbag device of the present invention, the soft crash judging means is a means provided with a maximum / minimum value detecting means and a collision mode judging means provided in the first collision mode judging apparatus of the present invention. Alternatively, the soft crash determination unit may be a unit that includes a differential operation unit and a collision type determination unit included in the second collision type determination device of the present invention.

Further, in the start-up device for an airbag device according to the present invention, the start-up means determines that the type of collision is a soft crash by the soft-crash determination means, and calculates the time integration value calculated by the integration calculation means. Is greater than or equal to a predetermined value, and when the deceleration detected by the deceleration detecting means satisfies a condition that is equal to or greater than a predetermined deceleration,
The expansion rate may be a means for selecting a high speed. In the activation device for an airbag device according to the aspect of the present invention, in addition to the conditions, the activation unit may include a predetermined time range from a start time of the determination by the soft crash determination unit to a time when the locus reaches the minimum value. When the condition is satisfied, a means for selecting a high speed as the expansion speed may be used.

[0023]

Next, embodiments of the present invention will be described with reference to examples. FIG. 1 is a configuration diagram schematically showing the configuration of a collision type determination device 20 according to one embodiment of the present invention using functional blocks, and FIG. 2 is a schematic diagram of the hardware configuration of the collision type determination device 20 of the embodiment. FIG. 3 is an explanatory diagram illustrating a state in which the collision type determination device 20 according to the embodiment is mounted on the vehicle 10.

As shown in FIGS. 1 and 3, the collision type discriminating apparatus 20 of the embodiment is a floor sensor 22 mounted near the center console of the vehicle 10 to detect deceleration.
And a signal input unit 28 for inputting the deceleration G detected by the floor sensor 22 and performing moving average processing, and a time differential value dGave of the moving average deceleration Gave subjected to moving average processing.
, A threshold value setting unit 34, and a determination unit 36. The moving average deceleration Gave and the time differential value dGa
and a soft crash determination unit 32 that determines whether the type of vehicle collision is a soft crash based on ve.

As shown in FIG. 2, the hardware configuration of the collision type discriminating apparatus 20 of the embodiment is a floor sensor 22 and a CPU.
Microcomputer 40 mainly constituted by 42
It is composed of Microcomputer 40
Is a ROM storing a processing program in addition to the CPU 42
44, a RAM 46 for temporarily storing data, and an input / output processing circuit (I / O) 48. When the processing program stored in the ROM 44 is started, the components of the collision type determination device 20 of the embodiment illustrated in FIG. 1 function integrally with software and hardware. In FIG. 2, the deceleration is attached to the front of the left and right side members of the vehicle 10 in order to determine another type of vehicle collision, for example, whether it is a symmetrical collision or an asymmetrical collision. Left and right front sensor 2 for detecting
4, 26 are also shown.

The signal input unit 28 samples the deceleration G detected by the floor sensor 22 at a predetermined sampling frequency (for example, 2 [kHz]) to remove noise from the sampled deceleration G. A Kalman filter process and a moving average process are performed. In this embodiment, the moving average deceleration Gave is calculated by averaging the deceleration G for 10 msec before the current time. Moving average deceleration Gave thus obtained
Exceeds a predetermined value (for example, 2G or 3G),
The differential calculation unit 30 and the soft crash determination unit 32 function to determine the type of collision of the vehicle. FIG. 4 shows the time change of the deceleration G detected by the floor sensor 22, the time change of the moving average deceleration Gave obtained by the signal input unit 28, and the time change of the time differential value dGave calculated by the differentiation operation unit 30. Are exemplified.

The threshold setting unit 34 of the soft crash determination unit 32 calculates the moving average deceleration Ga for the time differential value dGave.
When ve reaches the first maximum value Gmax, the first maximum value Gmax
Is multiplied by predetermined coefficients K1 and K2 to obtain a threshold Gupper and a threshold Gl.
Set ower. Here, the threshold value Gupper is set as a boundary for discriminating whether the form of the vehicle collision is a soft crash or a head-on collision.
Is set as a boundary for distinguishing between a soft crash as a form of vehicle collision and whether the vehicle is traveling on a bad road. Therefore, the threshold value Gupper and the threshold value Glower are determined by a collision experiment with a vehicle on which the collision type determination device 20 of the embodiment is mounted. In the embodiment, 0.6 is used as the predetermined coefficient K1 to set the threshold value Gupper, and 0.05 is used as the predetermined coefficient K2 to set the threshold value Glower. In addition,
The first maximum value Gmax and the first minimum value Gact are calculated using the time differential value dG
plot the trajectory of the moving average deceleration Gave with respect to ave,
It can be obtained based on the rate of change of the moving average deceleration Gave.

Determination unit 36 of soft crash determination unit 32
Is the first after the first maximum Gmax of the moving average deceleration Gave
The minimum value Gact is the threshold value Gu set by the threshold value setting unit 34
It is determined whether or not the type of collision of the vehicle is a soft crash, based on whether or not the vehicle is within a range set by the pper and the threshold Glower.

Next, a specific operation of the collision mode determination device 20 of the embodiment configured as described above will be described. FIG.
5 is a flowchart illustrating an example of a soft crash determination processing routine executed by the microcomputer 40 of the collision mode determination device 20 according to the embodiment. This routine is repeatedly executed for each sampling cycle from when the moving average deceleration Gave exceeds a predetermined value G1.

When the soft crash determination processing routine is executed, the CPU 42 of the microcomputer 40
First, a process of reading the deceleration G detected by the floor sensor 22 is executed (Step S100). continue,
The moving average deceleration Gave and the time derivative dGave of the moving average deceleration Gave are calculated (steps S102 and S10).
4). Then, the locus of the moving average deceleration Gave with respect to the time differential value dGave is plotted (step S10).
6) Check the determination flag F (step S108). Here, the determination flag F is a flag having, as a value, whether or not the first maximum value Gmax with respect to the moving average deceleration Gave axis of the trajectory is detected, and the value 1 when the first maximum value Gmax is detected. Is set. When this routine is executed, a value 0 is set to the determination flag F by an initialization processing routine (not shown) executed prior to this routine.
Is set.

When the determination flag F is 0, it is determined whether or not the moving average deceleration Gave has reached the first maximum value Gmax (step S110). If the moving average deceleration Gave has not reached the first maximum value Gmax, this routine is terminated. I do. Moving average deceleration G
When ave reaches the first maximum value Gmax, the first maximum value G
The threshold value Gupper and the threshold value Glower are set by multiplying max by the predetermined coefficients K1 and K2 (step S112), the value 1 is set to the determination flag F (step S114), and this routine ends.

After the value 1 is set to the determination flag F, the determination flag F is determined to be the value 1 in the process of step S108, and the moving average deceleration Gave is set to the first minimum value Gact.
Is determined (step S120). First
If the minimum value Gact has not been reached, this routine ends. When the moving average deceleration Gave has reached the first minimum value Gact, it is determined whether or not the first minimum value Gact is within a range set by the threshold value Gupper and the threshold value Glower (step S122). In this case, it is determined that a soft crash has occurred (step S124), and this routine is terminated. On the other hand, when the first minimum value Gact is out of the range set by the threshold value Gupper and the threshold value Glower, this routine is terminated without determining that a soft crash has occurred.

The collision type determination device 2 of the embodiment described above
According to 0, it is possible to determine whether or not the type of collision of the vehicle is a soft crash. Moreover, the determination can be made based only on the deceleration G detected by the floor sensor 22. Also, a threshold Gupper, which is a boundary for distinguishing whether the form of the vehicle collision is a soft crash or a head-on collision, and a boundary for distinguishing whether the form of the vehicle is a soft crash or the vehicle is traveling on a bad road. A certain threshold Glo
Since a soft crash is determined by wer, the collision mode can be determined more accurately. Further, since the determination can be made at the time when the first minimum value of the moving average deceleration Gave is detected, the soft crash can be quickly determined.

In the collision type determination device 20 of the embodiment, the first
The maximum value Gmax is multiplied by predetermined coefficients K1 and K2 to obtain a threshold value Gupp.
Although er and the threshold Glower are set, predetermined values may be used as the threshold Gupper and the threshold Glower.

The collision type determination device 20 of the embodiment plots the locus of the moving average deceleration Gave with respect to the time differential value dGave, detects the first maximum value Gmax and the first minimum value Gact, and determines soft crash. Is the first maximum value Gmax
Alternatively, if the first minimum value Gact can be accurately detected without using the time differential value dGave, the determination may be made only by the moving average deceleration Gave. Collision type determination device 2 of this modified example
FIG. 7 is a configuration diagram illustrating an outline of the configuration of OB as a functional block. Collision type determination device 20B of this modified example
Includes a floor sensor 22 and a signal input unit 28 having the same configuration as the collision type determination device 20 of the embodiment, and a local minimum value for detecting a first maximum value Gmax and a first minimum value Gact of the moving average deceleration Gave. A soft crash determination unit 32B including a detection unit 31, a threshold setting unit 34B, and a determination unit 36B
And The threshold setting unit 34B sets the threshold Gupper and the threshold Glower based on the first local maximum Gmax, and the determining unit 36B determines that the first local minimum Gact is the threshold Gupper and the threshold Glo.
It is determined whether or not the collision type of the vehicle is a soft crash based on whether or not the vehicle is within a range set by wer. Note that the first maximum value G in the local maximum value detecting unit 31 is
The detection of max and the first minimum Gact is based on the moving average deceleration Gave
And a detection method based on the phase of the wavelet transform power value with respect to the moving average deceleration Gave. The moving average deceleration Gav
A method based on the phase of the wavelet transform power value for e is described in the application by the present applicant (Japanese Patent Application No.
No. 90732). In the present invention, any detection method may be used as long as the first maximum value Gmax and the first minimum value Gact can be detected.

The collision type judging device 20B of such a modification example
FIG. 8 illustrates a soft crash determination processing routine executed by the microcomputer 40 of FIG. In this routine, the process of calculating the time differential value dGave in step S104 of the routine in FIG. 6 and the process of plotting the trajectory in step S106 are eliminated. This is because the basic principle of the determination of the soft crash is the same except for the detection of the first maximum value Gmax and the first minimum value Gact. Therefore, the description of the routine in FIG.

Next, a description will be given of an airbag device starting device 120 according to a second embodiment of the present invention. FIG. 9 is a block diagram showing the outline of the configuration of the activation device 120 of the airbag device of the second embodiment in functional blocks, and FIG.
FIG. 2 is a configuration diagram illustrating an outline of a hardware configuration of an activation device of the airbag device according to the embodiment.

Starting device 1 of the airbag device of the second embodiment
Reference numeral 20 denotes a floor sensor 1 mounted near the center console of the vehicle 10 to detect deceleration, as shown in FIG.
22 and the deceleration G detected by the floor sensor 122
, A signal input unit 128 for performing a moving average process, a soft crash determining unit 132 for determining whether the collision mode of the vehicle is a soft crash based on the moving average deceleration Gave, and a signal from the determination start time to the current time. Integral calculation unit 13 for calculating time integral value Vn of moving average deceleration Gave
8, an activation unit 139 that activates the airbag device 150 based on the determination from the soft crash determination unit 132 and the time integral value Vn of the moving average deceleration Gave calculated by the integration calculation unit 138 and the moving average deceleration Gave. And

In the configuration of the activation device 120 of the airbag device of the second embodiment, the floor sensor 122 and the signal input unit 128 are the same as the floor sensor 22 and the signal input unit 28 of the collision type determination device 20 of the first embodiment. The soft crash determination unit 132 is the same as the differential operation unit 3 of the first embodiment.
0 and the soft crash determination unit 32 or the maximum and minimum value detection unit 31 and the soft crash determination unit 32 of the modified example
Same as B.

The starting device 1 of the airbag device according to the second embodiment.
As shown in FIG. 10, the hardware configuration of the unit 20 includes a floor sensor 122 and a microcomputer 140 configured around a CPU 142, and a startup signal is output from the microcomputer 140 to the airbag device 150. It has become. The microcomputer 140 includes, in addition to the CPU 142, a ROM 144 that stores a processing program and an R 144 that temporarily stores data.
An AM 146 and an input / output processing circuit (I / O) 148 are provided in the same manner as the collision mode determination device 20 of the first embodiment, and the activation device 120 of the airbag device of the second embodiment illustrated in FIG. Similarly, when the processing program stored in the ROM 144 is activated, the software and hardware function as one unit.

The airbag device 150 is provided with the airbag 15.
2, two inflators 154 for supplying gas to the airbag 152, two ignition devices 156 for igniting a gas generating agent (not shown), and a microcomputer 140.
And two drive circuits 158 that energize and ignite the two ignition devices 156 based on the activation signal from The two inflators 154 are provided so that the two inflators 154 are simultaneously operated to inflate the airbag 152 at a high speed, and the two inflators 154 are operated with a time lag to inflate the airbag 152 at a low speed. This is for performing low-speed expansion. The selection between the high-speed expansion and the low-speed expansion is set according to the type of collision or the like.

Next, the operation of the thus-configured starting device 120 of the airbag device of the second embodiment will be described. FIG. 11 is a flowchart illustrating an example of a startup processing routine executed by the microcomputer 140 of the activation device 120 of the airbag apparatus according to the second embodiment.
This routine is executed when the moving average deceleration Gave exceeds a predetermined value G1.

When the startup routine is executed, the CPU 142 of the microcomputer 140 first determines whether a predetermined time has elapsed (step S200).
Here, the predetermined time is provided for terminating the routine when the vehicle has not collided after the routine has been started. If the predetermined time has not elapsed, it is determined whether a soft crash has been determined (step S202). The determination of the soft crash is as described in the collision mode determination apparatus 20 of the first embodiment and the collision mode determination apparatus 20B of the modified example, and is performed by the soft crash determination processing routine illustrated in FIGS. If it is not determined that a soft crash has occurred, the process returns to step S200.

If it is determined that a soft crash has occurred before the predetermined time has elapsed, it is determined whether the current time t falls within a time range set by the threshold values t1 and t2 (step S204). Here, the threshold value t1 is determined by the signal input unit 12
At 8, the time is set as the time when a predetermined time has elapsed from the time when the moving average deceleration Gave has exceeded the predetermined value G1, to prevent malfunction due to noise or the like. Also, the threshold t
2 is also set as a time when a predetermined time has elapsed from the time when the moving average deceleration Gave exceeds the predetermined value G1 in the signal input unit 128, and in order to prohibit a response to a collision mode not confirmed by a collision experiment or the like. belongs to.
The threshold value t1 and the threshold value t2 are determined by a collision test or the like by a vehicle on which the activation device 120 of the airbag device of the second embodiment is mounted. The current time t is equal to the thresholds t1 and t2
If it is not within the time range set by
This routine ends without performing any further determination.

When the current time t falls within the time range set by the threshold values t1 and t2, the deceleration G detected by the floor sensor 122 is read (step S206), and the moving average deceleration Gave is calculated. (Step S208) The time integration value V is set as an integration section from when the moving average deceleration Gave exceeds the predetermined value G1 to the current time t.
n is calculated (step S210). Then, the moving average deceleration Gave is larger than the threshold value Gref and the time integration value Vn
Is greater than or equal to the threshold value Vref (step S212). Here, the threshold Gref is set to prohibit a response due to a medium-speed collision, and the threshold Vref
f is provided to prohibit a response to noise or a rough road. Such a threshold Gref and a threshold V
ref is the activation device 12 of the airbag device of the second embodiment.
0 is determined by a collision experiment or the like with a vehicle mounted. FIG. 12 shows the moving average deceleration Gave and the time integral value Vn.
And an example of the threshold Gref and the threshold Vref.

When the moving average deceleration Gave is equal to or less than the threshold value Gref or when the time integration value Vn is equal to or less than the threshold value Vref, this routine is terminated, and the moving average deceleration Gave is larger than the threshold value Gref and the time integration value Vn is larger than the threshold value Vref. If it is larger, high-speed inflation for inflating the airbag 152 at high speed is set (step S214), and this routine ends. When the high-speed inflation is set in this way, a start-up signal is output from the input / output processing circuit 148 to the two drive circuits 158, the two ignition devices 156 are ignited simultaneously, and the airbag 152 is inflated at a high speed.

The activation device 120 of the airbag device of the second embodiment outputs a activation signal to inflate the airbag 152 at high speed when it is determined that a soft crash has occurred and other conditions are satisfied. Is performed in parallel with the activation process in another collision mode, and when the output condition of the activation signal is satisfied in the activation process in another collision mode, It goes without saying that the start signal is output.

According to the activation device 120 of the airbag device of the second embodiment described above, when it is determined that a soft crash has occurred, the airbag 152 can be rapidly inflated on the condition that other conditions are satisfied. it can. In addition, as other conditions, a response due to a medium-speed collision, a response to noise or a bad road, and a response to a collision mode that has not been confirmed by a collision test or the like are taken into consideration. Can be.

The starting device 1 of the airbag device according to the second embodiment.
At 20, the other considerations are a response due to a medium-speed collision, a response to a noise or a bad road, and a response to a collision type that has not been confirmed by a collision experiment or the like. The moving average deceleration Gave is larger than the threshold Gref, and the time integration value Vn is within the range of the threshold t1 and the threshold t2.
Although the condition is set to be larger than ref, it is not necessary to satisfy all of these conditions, and only some of the conditions may be used. It should be noted that it is desirable to determine which conditions are used by a collision experiment with a vehicle or the like.

The embodiments of the present invention have been described with reference to the embodiments. However, the present invention is not limited to these embodiments, and various embodiments may be made without departing from the scope of the present invention. Of course, it can be carried out.

[Brief description of the drawings]

FIG. 1 is a collision type determination device 2 according to an embodiment of the present invention.
FIG. 2 is a configuration diagram showing an outline of the configuration of the first embodiment using functional blocks.

FIG. 2 is a configuration diagram showing an outline of a hardware configuration of a collision type determination device 20 of the embodiment.

FIG. 3 is an explanatory view exemplifying a state in which the collision type determination device 20 of the embodiment is mounted on a vehicle 10.

FIG. 4 shows a deceleration G detected by a floor sensor 22.
FIG. 5 is an explanatory diagram exemplifying a time change of the moving average deceleration Gave obtained by the signal input unit 28 and a time change of the time differential value dGave calculated by the differential operation unit 30.

FIG. 5 is an explanatory diagram showing an example of a locus of a moving average deceleration Gave with respect to a time differential value dGave.

FIG. 6 is a flowchart illustrating an example of a soft crash determination processing routine executed by the microcomputer 40 of the collision mode determination device 20 according to the embodiment.

FIG. 7 is a configuration diagram illustrating, as functional blocks, an outline of the configuration of a collision mode determination device 20B according to a modified example.

FIG. 8 is a flowchart illustrating an example of a soft crash determination processing routine executed by a microcomputer 40 of a collision mode determination device 20B according to a modified example.

FIG. 9 shows an activation device 12 of the airbag device according to the second embodiment.
FIG. 2 is a configuration diagram schematically illustrating a configuration of a block No. 0 by functional blocks.

FIG. 10 shows an activation device 1 of the airbag device according to the second embodiment.
FIG. 2 is a configuration diagram illustrating an outline of a hardware configuration of the H.20.

FIG. 11 shows an activation device 1 of the airbag device according to the second embodiment.
20 is a flowchart illustrating an example of a startup processing routine executed by a microcomputer 140 of FIG.

FIG. 12 is an explanatory diagram showing an example of a moving average deceleration Gave, a time integration value Vn, a threshold Gref, and a threshold Vref.

[Explanation of symbols]

10 vehicle, 20, 20B collision type determination device, 22,
122 floor sensor, 24, 124 left front sensor, 26, 126 right front sensor, 28, 128
Signal input section, 30 differential operation section, 32, 32B soft crash determination section, 34, 34B threshold value setting section, 36,
36B judgment unit, 40, 140 microcomputer, 42, 142 CPU, 44, 144 ROM, 4
6,146RAM, 48,148 I / O processing circuit, 1
32 soft crash determination unit, 138 integration operation unit,
139 activation unit, 150 airbag device, 152 airbag, 154 inflator, 156 ignition device,
158 Drive circuit.

Claims (14)

[Claims] 1. A collision type determination device for determining whether a type of collision of a vehicle is a soft crash, comprising: a deceleration detecting means disposed at a predetermined position of the vehicle for detecting a deceleration; A maximum minimum value detecting means for detecting a first maximum value of the deceleration and a first minimum value after the first maximum value, and when the detected first minimum value is within a predetermined range, the vehicle And a collision type determination unit that determines that the type of collision is a soft crash. 2. A collision type determination device for determining whether the type of collision of a vehicle is a soft crash, comprising: a deceleration detecting means disposed at a predetermined position of the vehicle for detecting deceleration; Differential operation means for calculating a time differential value of the deceleration, and a first local minimum after passing through a first maximum value with respect to an axis of the deceleration of the locus of the calculated time differential value with respect to the detected deceleration. A collision type determination device comprising: a collision type determination unit that determines that the type of collision of the vehicle is a soft crash when the value is within a predetermined range. 3. The predetermined range is defined by a first predetermined value for determining that the vehicle is traveling on a rough road and a second predetermined value for determining that the type of collision of the vehicle is a head-on collision. 3. The collision mode determination device according to claim 1, wherein the range is a set range. 4. The collision type determination device according to claim 1, wherein the collision type determination unit includes a predetermined range setting unit that sets the predetermined range based on the first maximum value. 5. The predetermined range setting means calculates two different predetermined values by multiplying the first maximum value by two different predetermined coefficients, and sets the range of the two predetermined values as a predetermined range. The collision type determination device according to claim 4, wherein 6. A collision type determination method for determining whether the type of collision of a vehicle is a soft crash, wherein a first minimum value after a first maximum value of the deceleration at a predetermined position of the vehicle is within a predetermined range. A collision type determination method for determining that the type of collision of the vehicle is a soft crash when the vehicle is within the range. 7. A collision type determination method for determining whether a type of collision of a vehicle is a soft crash, wherein an axis of a deceleration of a trajectory with respect to a time differential value of a deceleration at a predetermined position of the vehicle with respect to the deceleration is provided. A collision mode determination method for determining that the mode of the vehicle collision is a soft crash when the minimum value after passing through the maximum value is within a predetermined range. 8. The predetermined range is defined by a first predetermined value for determining that the vehicle is traveling on a rough road and a second predetermined value for determining that the type of collision of the vehicle is a head-on collision. 8. The collision mode determination method according to claim 6, wherein the range is a set range. 9. The method according to claim 1, wherein the predetermined range is different from the maximum value by 2
8. The collision type determination method according to claim 6, wherein the predetermined range is a range set by two different predetermined values by multiplying the two predetermined coefficients. 10. An activation device for activating an airbag device having a plurality of inflators and capable of selecting an inflation speed, wherein the activation device is disposed at a predetermined position of the vehicle and detects deceleration. Soft crash determining means for determining whether the form of the vehicle collision is a soft crash based on the detected deceleration, and integration calculating means for calculating a time integral value of the deceleration detected by the deceleration detecting means. Selecting the inflation speed based on the determination by the soft crash determination means, the time integral value calculated by the integration calculation means, and the deceleration detected by the deceleration detection means, and activating the airbag device. An activation device for an airbag device, comprising: activation means. 11. The activation device for an airbag apparatus according to claim 10, wherein said soft crash determination means includes means for detecting a maximum value and a minimum value and a collision type determination means according to claim 1. 12. The activation device for an airbag apparatus according to claim 10, wherein said soft crash determination means includes means for differentiating and determining a collision mode according to claim 2. 13. The deceleration detection means, wherein the activation means determines that the form of collision is a soft crash by the soft crash determination means, and the time integration value calculated by the integration calculation means is equal to or greater than a predetermined value. 13. The activation device for an airbag device according to claim 10, wherein when the condition that the deceleration detected by the device is equal to or greater than a predetermined deceleration satisfies a condition, a high speed is selected as the inflation speed. 14. The method according to claim 14, wherein the activation unit includes:
14. The air according to claim 13, wherein when the condition from the start time of the determination by the soft crash determination unit to the time when the locus reaches the minimum value is within a predetermined time range, a high speed is selected as the inflation speed. Starter for the back device.