CN103101502B - Air-bag control device and air bag controlled method - Google Patents
Air-bag control device and air bag controlled method Download PDFInfo
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Abstract
The invention provides a kind of air-bag control device and air bag controlled method, its with vehicle and the crash behavior of obstacle corresponding and change the decision method of airbag deployment, make the expansion timing optimization of air bag.The control setup of air bag is based on the value of the detected value of front sensors being carried out to interval integral, and determining whether can deployment balloon.Further, when the value after the detected value of front sensors is carried out interval integral exceedes the threshold value of regulation, can deployment balloon for whether, make the judgement based on the detected value of floor sensor being carried out the variable quantity after interval integral effective.Thus, the state of impact can be caught significantly, when the user of vehicle needs air bag, can deployment balloon and protect user as soon as possible.
Description
Technical field
The present invention relates to a kind of airbag deployment when vehicle and obstacle collide to control.
Background technology
Current, when vehicle and obstacle collide, the expansion that air-bag control device utilizes following structure to carry out the air bag that vehicle has controls.There is at the Vehicular body front of vehicle the sensor (hereinafter referred to " front sensors ") of the impact degree derived vehicle and obstacle collide, and be arranged on car indoor and derive the sensor (hereinafter referred to " floor sensor ") of impact degree when vehicle and obstacle collide.And, the detected value of front sensors is carried out interval integral in the width of regulation, according to the corresponding relation of the value of interval integral and the threshold value (hereinafter also referred to as " front threshold ") of regulation, change and the detected value of floor sensor carried out interval integral and the threshold value (hereinafter also referred to as " floor threshold value ") corresponding to value that obtains.That is, according to the interval integral value of front sensors and the corresponding relation of front threshold, change the floor threshold value corresponding to interval integral value with floor sensor.Further, exceed front threshold in the interval integral value of front sensors, and when the interval integral value of floor sensor exceedes floor threshold value, carry out the control making airbag deployment.
Specifically, when the interval integral value of front sensors exceedes the max-thresholds in multiple front threshold, make to become less threshold value with the threshold value corresponding to the interval integral value of floor sensor.Further, when the interval integral value of floor sensor exceedes less threshold value, the airbag deployment in vehicle is arranged on.Like this; when the interval integral value of front sensors exceedes max-thresholds; protect the essentiality of passenger high as early as possible; the floor threshold value of floor sensor is made to become less threshold value; the timing adjustment interval integral value of floor sensor being exceeded floor threshold value is the timing of comparatively morning, carries out the control of deployment balloon as early as possible.In addition, as the data that technology related to the present invention is described, there is patent documentation 1.
Patent documentation 1: Japanese Unexamined Patent Publication 2000-255374 publication
Summary of the invention
But, even if according to the interval integral value of front sensors, less threshold value is changed to by with the floor threshold value corresponding to the interval integral value of floor sensor, still exist because vehicle is different with the collision status of obstacle, the interval integral value of floor sensor exceedes the situation that floor threshold value needs the regular hour.Such as, " head-on crash " that collide from roughly front without lateral excursion at vehicle and obstacle and vehicle and obstacle collide from roughly front and part impinging one another from center collides situations such as " offset collisions " to lateral excursion, sometimes carry out airbag deployment control described as follows.That is, although the increment rate of the interval integral value of front sensors is comparatively large, exceed comparatively morning time of front threshold, until the interval integral value of floor sensor still needs the regular hour before exceeding floor threshold value.Its result, does not carry out the expansion of air bag in the timing that should launch, the possibility that the expansion with air bag postpones.
The object of the present invention is to provide a kind of air-bag control device and air bag controlled method, its with vehicle and the crash behavior of obstacle corresponding and change the decision method of airbag deployment, make the expansion timing optimization of air bag.
In order to solve above-mentioned problem, the invention provides a kind of air-bag control device, it has: acquiring unit, it obtains the 1st detected value and the 2nd detected value from the 1st detecting unit and the 2nd detecting unit, the car that 1st detecting unit is arranged on vehicle is indoor, aforementioned 1st detected value of impact degree when derivation expression aforementioned vehicle and obstacle collide, 2nd detecting unit is configured in the front portion of aforementioned vehicle, aforementioned 2nd detected value of impact degree when derivation expression aforementioned vehicle and obstacle collide; Lead-out unit, it carries out interval integral to aforementioned 1st detected value and derives the 1st integrated value, and derives the variable quantity of aforementioned 1st integrated value, carries out aforementioned interval integral and derive the 2nd integrated value to aforementioned 2nd detected value; Identifying unit, it determines whether to launch based on aforementioned 1st integrated value the air bag that aforementioned vehicle has; And output unit, the driving circuit of the determination information being used for launching aforementioned air bag obtained by aforementioned identifying unit to the expansion controlling aforementioned air bag exports by it, it is characterized in that, when aforementioned 2nd integrated value exceedes the threshold value of regulation, aforementioned identifying unit determines whether to launch aforementioned air bag based on aforementioned variable quantity.
Aforementioned lead-out unit derives specific change amount, this specific change amount is the variable quantity of the 3rd integrated value, 3rd integrated value is carried out interval integral with the width narrower than the integrating range of aforementioned 1st integrated value to aforementioned 1st detected value and is obtained, when aforementioned 2nd integrated value exceedes the specific threshold larger than the threshold value of aforementioned regulation, aforementioned identifying unit determines whether to launch aforementioned air bag based on aforementioned specific change amount.
In addition, the invention provides a kind of air-bag control device, it has: the 1st detecting unit, and its car being arranged on vehicle is indoor, the 1st detected value of impact degree when derivation expression aforementioned vehicle and obstacle collide; Driving circuit, it controls the expansion of the air bag that aforementioned vehicle has; And control setup, it determines whether to launch aforementioned air bag, determination information is exported to aforementioned driving circuit, it is characterized in that, foregoing control device has: acquiring unit, it obtains aforementioned 1st detected value and aforementioned 2nd detected value from aforementioned 1st detecting unit and the 2nd detecting unit, and the 2nd detecting unit is configured in the front portion of aforementioned vehicle, the 2nd detected value of impact degree when derivation expression aforementioned vehicle and obstacle collide; Lead-out unit, it carries out interval integral to aforementioned 1st detected value and derives the 1st integrated value, and derives the variable quantity of aforementioned 1st integrated value, carries out aforementioned interval integral and derive the 2nd integrated value to aforementioned 2nd detected value; Identifying unit, it determines whether to launch air bag that aforementioned vehicle has based on aforementioned 1st integrated value; And output unit, the aforementioned determination information being used for launching aforementioned air bag obtained by aforementioned identifying unit exports to aforementioned driving circuit by it, when aforementioned 2nd integrated value exceedes the threshold value of regulation, aforementioned identifying unit determines whether to launch aforementioned air bag based on aforementioned variable quantity.
And, the invention provides a kind of air bag controlled method, it has following operation: (a) obtains the 1st detected value and the 2nd detected value from the 1st detecting unit and the 2nd detecting unit, the car that 1st detecting unit is arranged on vehicle is indoor, aforementioned 1st detected value of impact degree when derivation expression aforementioned vehicle and obstacle collide, 2nd detecting unit is configured in the front portion of aforementioned vehicle, aforementioned 2nd detected value of impact degree when derivation expression aforementioned vehicle and obstacle collide; B () carries out interval integral to aforementioned 1st detected value and derives the 1st integrated value, and derive the variable quantity of aforementioned 1st integrated value, carries out aforementioned interval integral and derive the 2nd integrated value to aforementioned 2nd detected value; C () determines whether to launch air bag that aforementioned vehicle has based on aforementioned 1st integrated value; And the driving circuit output of determination information to the expansion of the aforementioned air bag of control for launching aforementioned air bag that (d) will be obtained by foregoing sequence (c), it is characterized in that, when aforementioned 2nd integrated value exceedes the threshold value of regulation, in foregoing sequence (c), determine whether to launch aforementioned air bag based on aforementioned variable quantity.
The effect of invention
According to the present invention, interval integral value due to the detected value in front sensors exceedes the threshold value of regulation, variable quantity based on the integrated value of floor sensor determines whether can deployment balloon, therefore determine whether with the interval integral value of the detected value based on floor sensor compared with the situation of deployment balloon, can to catch the state of collision significantly.In addition, when the user of vehicle needs air bag, can deployment balloon and protect user as soon as possible.
In addition, according to the present invention, interval integral value due to the detected value in front sensors exceedes the specific threshold larger than the threshold value of regulation, specific change amount based on the integrated value of floor sensor determines whether can deployment balloon, therefore determine whether with the variable quantity of the integrated value based on floor sensor compared with the situation of deployment balloon, can to judge the change of collision status more early.In addition, when the user of vehicle needs air bag, user can be protected with more suitable timing deployment balloon.
Accompanying drawing explanation
Fig. 1 is the figure of the configuration of the floor sensor comprised in the front sensors and ECU representing that vehicle has.
Fig. 2 is the block diagram of the system mainly with front sensors, air bag and ECU.
Fig. 3 is the figure of the detected value representing floor sensor.
Fig. 4 is the figure of the interval integral process of the detected value representing floor sensor.
Fig. 5 is the figure representing the curve corresponding with the interval integral value of floor sensor and full integrated value.
Fig. 6 is the figure representing the curve corresponding with the interval integral value of front sensors and full integrated value.
Fig. 7 is the figure representing the curve corresponding with the variable quantity of the 1st integrated value of floor sensor and full integrated value.
Fig. 8 is the sequential chart of the signal representing each sensor of vehicle when colliding with obstacle in running at high speed.
Fig. 9 be represent detection unit determine whether can deployment balloon when the figure of decision circuit.
Figure 10 is the figure representing the curve corresponding with the interval integral value of front sensors and full integrated value.
Figure 11 is the figure be described the derivation of the specific change amount of floor sensor.
Figure 12 is the figure representing the curve corresponding with the specific change amount of floor sensor and full integrated value.
Figure 13 is the sequential chart of the value representing each sensor of vehicle when colliding with obstacle in running at high speed.
Figure 14 be represent detection unit determine whether can deployment balloon when the figure of decision circuit.
Detailed description of the invention
Below, reference accompanying drawing is while be described embodiments of the present invention.Embodiment below illustrates, and is not that technical scope of the present invention is defined in these.
(the 1st embodiment)
(1, each sensor layout circle)
Fig. 1 is the figure of the front sensors 20 (front sensors 20a and front sensors 20b) representing that vehicle 1 has and the configuration being included in the floor sensor 30 in ECU (ElectronicControlUnit) 3.
Front sensors 20a and front sensors 20b is configured in the front portion of vehicle 1.In detail, front sensors 20a is arranged on the right front of the car body of vehicle 1, and front sensors 20b is arranged on the left front of the car body of vehicle 1.Further, each sensor be separately positioned on vehicle 1 radiator support element near and side member equipotential be set up.
The car that floor sensor 30 is configured in vehicle 1 is indoor, and is configured in the floor tunnel portion of the substantial middle being positioned at vehicle 1.In addition, floor sensor 30 is arranged in ECU3.
(2, block diagram)
Fig. 2 is the block diagram of system mainly with front sensors 20a, 20b, air bag 50 and ECU3.
The deceleration/decel of impact degree when front sensors 20a and 20b collides to expression vehicle 1 and obstacle detects.Here, so-called deceleration/decel is every speed of losing for 1 second when vehicle 1 collides with obstacle, is the acceleration/accel of negative value.
Air bag 50 is in the gas feeding air bag by the gunpowder explosion due to inside being produced thus the device absorbed to the impact of the user of the passenger as vehicle 1.In addition, air bag 50 has the firing unit 501 as ignition device in inside, makes firing unit 501 be energized and make the gunpowder explosion of air bag 50 inside.
ECU3 is impact degree when colliding according to vehicle 1 and obstacle and controls the device of the expansion of air bag 50.In addition, ECU3 has floor sensor 30, driving circuit 40 and control setup 9.
The deceleration/decel of impact degree when floor sensor 30 is collided to expression vehicle 1 and obstacle by the floor tunnel portion of vehicle 1 detects.
Driving circuit 40 is the drive singal that exports based on the input/output circuitry 10 (hereinafter referred to I/O circuit 10) from ECU3 described later and makes firing unit 501 alive circuit of air bag 50.
Control setup 9 mainly has input/output circuitry 10, CPU11 (CentralProcessingUnit) and nonvolatile memory 12.
I/O circuit 10 obtains the deceleration/decel of the detected value detected as front sensors 20 and floor sensor 30.In addition, the drive singal from CPU11 exports to driving circuit 40 by I/O circuit 10.
CPU11 carries out the process determining whether to launch the air bag 50 that vehicle 1 has.CPU11 mainly has leading-out portion 111, detection unit 112 and changing unit 113.
The detected value of leading-out portion 111 couples of front sensors 20a, 20b carries out interval integral process, integrated value between leading-out zone.Here, based on the larger detected value in these two sensors of front sensors 20a, 20b detected value separately, derive the interval integral value (hereinafter also referred to as " the 2nd integrated value ") of front sensors 20.In addition, leading-out portion 111 also derives the full integrated value interval integral value of front sensors 20 be all added.
In addition, the detected value of leading-out portion 111 pairs of floor sensors 30 carries out interval integral process and integrated value (hereinafter also referred to as " the 1st integrated value ") between leading-out zone.In addition, leading-out portion also derives the full integrated value interval integral value of floor sensor 30 be all added.
Further, leading-out portion 111 derives the variable quantity (below also referred to as " variable quantity ") of the 1st integrated value.That is, the detected value of leading-out portion 111 pairs of floor sensors 30 carries out interval integral process, derives by an interval integral value with the variable quantity that this interval integral is worth other adjacent interval integral values.In addition, for by integrated value between leading-out portion 111 leading-out zone process and derive the process of variable quantity, after describe in detail.
Detection unit 112 determines whether to launch based on the 1st integrated value the air bag 50 that vehicle 1 has.That is, the 1st integrated value after the detected value of floor sensor 30 is carried out interval integral exceedes the threshold value of regulation (such as, threshold value th1 shown in Fig. 5) when, detection unit 112 judges the expansion must carrying out air bag 50, via I/O circuit 10 to driving circuit 40 output drive signal.
In addition, as shown in the above, can the decision condition of deployment balloon 50 for whether, in the judgement actv. situation that changing unit 113 makes based on variable quantity, detection unit 112 determines whether based on this variable quantity can deployment balloon 50.Like this, because determine whether based on variable quantity can deployment balloon 50, therefore determine whether with the 1st integrated value based on floor sensor 30 compared with the situation of deployment balloon 50, can to catch the state of collision significantly.In addition, when the user of vehicle needs air bag 50, can deployment balloon 50 and protect user as soon as possible.
When the 2nd integrated value of front sensors 20 exceedes threshold value (such as, the threshold value th2 shown in Fig. 6) of regulation, changing unit 113 makes the judgement based on variable quantity effective.That is, when the 2nd integrated value of front sensors 20 exceedes threshold value, the essentiality that air bag 50 is launched improves, and changing unit 113 makes detection unit 112 effective based on the judgement of variable quantity.
Nonvolatile memory 12 is stored in the process undertaken by CPU11 the various data used.Specifically, the main storage threshold data 121 of nonvolatile memory 12.
Threshold data 121 is and the threshold data corresponding to the value of carrying out the detected value of each sensor obtaining after interval integral etc. processes.Such as, the threshold value th3 etc. shown in the threshold value th2 shown in the threshold value th1 shown in Fig. 5, Fig. 6 and Fig. 7 is equivalent to.
(3, derivation process) based on the detected value of each sensor
Below, use curve is described the detected value of each sensor, interval integral value, variable quantity.Fig. 3 is the figure of the detected value representing floor sensor 30.The horizontal axis representing time [ms] of Fig. 3, the longitudinal axis represents deceleration/decel [m/s
2].
The deceleration/decel of the vehicle 1 that the curve s1 shown in Fig. 3 and curve s2 changes along with time lapse representing when colliding from vehicle 1 and obstacle.Here, the difference of curve s1 and curve s2 is, such as, speed when vehicle 1 collides from obstacle is different.That is, curve s1 is the curve of vehicle 1 when (such as 50km/h ~ 60km/h) collides with obstacle in travelling at a high speed.In addition, curve s2 is the curve of vehicle 1 when colliding with obstacle during low speed (such as 10km/h ~ 20km/h) travels.
Fig. 4 is the figure of the interval integral process of the detected value representing floor sensor 30.That is, Fig. 4 is the figure be described the interval integral process based on the curve s1 shown in Fig. 3 and curve s2, as an example, shows the state that the interval integral value of the curve s1 of the detected value as floor sensor 30 derives by leading-out portion 111.Interval integral process is: leading-out portion 111 couples of curve s1 carry out interval integral in the width wd1 (width of such as 10ms) of regulation, derive 1st integrated value corresponding with the integrated value of a width.In addition, the full integrated value that the integrated value of each width is all added by leading-out portion 111 derives.In addition, for curve s2, also carry out the derivation process of interval integral value and full integrated value identically with curve s1.
Fig. 5 be to determine whether based on the 1st integrated value can deployment balloon when the figure that is described of action, be the figure representing the curve corresponding with the interval integral value of floor sensor 30 and full integrated value.The curve s1a of Fig. 5 represents the value corresponding with the interval integral of the curve s1 of Fig. 4 and full integration, and curve s2a represents the value corresponding with the interval integral of the curve s2 of Fig. 4 and full integration.
The transverse axis of Fig. 5 represents full integrated value [m/s], and the longitudinal axis represents interval integral value [m/s
2].Here, the full integrated value of transverse axis be when colliding from vehicle 1 and obstacle to the amount of deceleration [m/s] of the vehicle 1 till certain hour (such as, the certain hour of the time gap of every 0.5ms).In addition, the interval integral value of the longitudinal axis is after vehicle 1 and obstacle collide, and carries out the value after interval integral within a certain period of time, represent deceleration/decel [m/s with the width of regulation
2].That is, the curve s1a shown in Fig. 5 and curve s2a represents the change of full integrated value every specified time (such as every 0.5ms) and interval integral value.
Further, as shown in Figure 5, threshold value th1 is arranged to curve s1a and curve s2a.Threshold value th1 is worth corresponding with full integrated value and interval integral, as shown in phantom in Figure 5, its value is set between curve s1a and s2a, to make when to collide with obstacle at a high speed (curve s1a) make airbag deployment (being referred to as ON condition), when colliding with low speed and obstacle, (curve s2a) does not make airbag deployment (being referred to as OFF condition).
When vehicle 1 is to collide with obstacle at a high speed, as shown in curve s1a, derive the interval integral value exceeding threshold value th1.That is, due to the timing at t3 moment (amount of deceleration v11), the 1st integrated value exceedes threshold value th1, and therefore the drive singal of the determination information as deployment balloon 50 exports to driving circuit 40 by detection unit 112.
On the other hand, when vehicle 1 collides with low speed and obstacle, as shown in curve s2a, derive the interval integral value lower than threshold value th1.That is, owing to not deriving the 1st integrated value exceeding threshold value th1, therefore detection unit 112 does not export the drive singal of deployment balloon 50 to driving circuit 40.
Fig. 6 is the figure representing the curve corresponding with the interval integral value of front sensors 20 and full integrated value.The transverse axis of Fig. 6 represents full integrated value [m/s], and the longitudinal axis represents interval integral value [m/s
2].Further, the curve s11 shown in Fig. 6 and curve s12 represents the change of full integrated value every specified time (such as every 0.5ms) and interval integral value.Like this, by by the detected value of floor sensor 30 with the two-dimensional representation of full integrated value and interval integral value, thus can setting threshold th1 to meet ON condition and OFF condition, if the interval integral value of floor sensor 30 i.e. the 1st integrated value exceedes threshold value th1, then the drive singal of deployment balloon 50 exports to driving circuit 40 by detection unit 112.But, in the collision determination only undertaken by the 1st integrated value, the situation that the expansion that there is air bag is delayed.Thus, the judgement undertaken by variable quantity described below is introduced.
The curve s11 of Fig. 6 is the curve of vehicle 1 when (such as 50km/h ~ 60km/h) collides with obstacle in travelling at a high speed.In addition, curve s12 is the curve of vehicle 1 when colliding with obstacle during low speed (such as 10km/h ~ 20km/h) travels.
Further, as shown in Figure 6, identically with Fig. 5, arrange threshold value th2 to curve s11 and curve s12, it meets for making ON condition and OFF condition, and switches to the judgement undertaken by variable quantity.When vehicle 1 collides with obstacle in running at high speed, as shown in curve s11, derive the interval integral value exceeding threshold value th2.That is, because timing the 2nd integrated value in the t1 moment (amount of deceleration v1) exceedes threshold value th2, therefore changing unit 113 makes the judgement based on variable quantity effective.
In addition, when vehicle 1 collides with obstacle in low speed driving, as shown in curve s12, the interval integral value lower than threshold value th2 is derived.That is, owing to not deriving the 2nd integrated value exceeding threshold value th2, therefore the 1st integrated value determined whether as decision condition can deployment balloon 50 for detection unit 112.
And, the passing of curve s11 represents that vehicle 1 is with situation about colliding with obstacle at a high speed, even if but when the speed of vehicle 1 is high speed, because vehicle 1 is different with the state of the collision of obstacle, also there is the situation that can not exceed threshold value th2 and curve passing.That is, also exist detection unit 112 not using variable quantity as decision condition, and the 1st integrated value determined whether as decision condition can the situation of deployment balloon.
Fig. 7 is the figure representing the curve corresponding with the variable quantity of the 1st integrated value of floor sensor 30 and full integrated value.In detail, the curve s1b of Fig. 7 represents the value corresponding with the full integrated value of the variable quantity of curve s1 and curve s1, and curve s2b represents the value corresponding with the full integrated value of the variable quantity of curve s2 and curve s2.The transverse axis of Fig. 7 represents full integrated value [m/s], and the longitudinal axis represents variable quantity [m/s
2].Here, the full integrated value of transverse axis be when colliding from vehicle 1 and obstacle the amount of deceleration of vehicle 1 to certain hour.In addition, the variable quantity of the longitudinal axis is the width that specifies carries out interval integral variable quantity to the detected value of floor sensor 30.In detail, be the difference of carrying out an interval integral value in each interval integral of integration and adjacent interval integral value with the width wd1 of the regulation shown in Fig. 4.Like this, the curve s1b shown in Fig. 7 and curve s2b represents the change of full integrated value every specified time (such as every 0.5ms) and interval integral value.
Further, as shown in Figure 7, threshold value th3 is arranged to curve s1b and curve s2b.When vehicle 1 is to collide with obstacle at a high speed, as shown in curve s1b, derive the variable quantity exceeding threshold value th3.That is, due to the timing at t2 moment (amount of deceleration v2), variable quantity exceedes threshold value th3, and therefore the drive singal of the determination information as deployment balloon 50 exports to driving circuit 40 by detection unit 112.
In addition, when vehicle 1 is with low speed collision, as shown in curve s2b, the variable quantity lower than threshold value th3 is derived.That is, owing to not deriving the variable quantity exceeding threshold value th3, therefore detection unit 112 does not export the drive singal of deployment balloon 50 to driving circuit 40.
(4, sequential chart)
Fig. 8 is the sequential chart of the signal representing each sensor of vehicle 1 when colliding with obstacle in running at high speed.In fig. 8, show the signal sg2 of the signal sg1 representing the 2nd integrated value of front sensors 20 and the relation of threshold value th2, the variable quantity of the 1st integrated value representing floor sensor 30 and the relation of threshold value th3, represent the signal sg3 of the 1st integrated value of floor sensor 30 and the relation of threshold value th1.Further, the value becoming sensor under the state that each signal is ON exceedes the state of corresponding threshold value, becomes the state of value lower than the threshold value of correspondence of sensor under for the state of OFF.
At first, owing to can not exceed threshold value th2 from t0 moment the 2nd integrated value (curve s11) to t1 and pass, the signal sg1 therefore shown in Fig. 8 keeps the state of OFF always and passes.Thus, within during the t0 moment to t1 moment, the judgement of the expansion of the air bag 50 undertaken by detection unit 112 based on floor sensor 30 the 1st integrated value and carry out.Further, because the signal sg3 shown in Fig. 8 is OFF state from t0 moment to the t1 moment, the 1st integrated value does not exceed threshold value th1, does not therefore meet decision condition.In addition, corresponding with the 1st integrated value of floor sensor 30, also derive the variable quantity (sg2) of the 1st integrated value.
Further, because the 2nd integrated value exceedes threshold value th2, therefore signal sg1 becomes ON state in the t1 moment.Its result, changing unit 113 makes the judgement based on the variable quantity corresponding with signal sg2 effective.
Then, as shown in Figure 8, because the t2 moment of the variable quantity corresponding with signal sg2 after the t1 moment and before the t3 moment exceedes threshold value th3, therefore the drive singal of the determination information as deployment balloon 50 exports to driving circuit 40 by detection unit 112.
In addition, when suppose detection unit 112 using the 1st integrated value as determine whether can the decision condition of deployment balloon 50,1st integrated value exceedes threshold value th1 in the t3 moment, signal sg3 shown in Fig. 8 becomes ON state in the t3 moment, but due to the moment that the t3 moment is after the t2 moment, therefore, when detection unit 112 makes decision condition be the 1st integrated value, with using variable quantity compared with the situation of the decision condition of detection unit 112, to the delay on the control generation time of deployment balloon 50.
Thus, when the 2nd integrated value of front sensors 20 exceedes threshold value th2, detection unit 112 determines whether based on the variable quantity of floor sensor 30 can deployment balloon 50, therefore determine whether with the 1st integrated value based on floor sensor 30 compared with the situation of deployment balloon 50, can to catch the state of impact significantly.In addition, when the user of vehicle needs air bag 50, can deployment balloon 50 and protect user as soon as possible.
(5, logical circuitry)
Fig. 9 be represent detection unit 112 determine whether can deployment balloon when the figure of decision circuit.Be provided with in logic circuits and door 101 and or door 102.With door 101, there is two input parts and an efferent.In addition, or door 102 has two input parts and an efferent, with the efferent of door 101 with or door two input parts in an input part be electrically connected.
With an input part (hereinafter referred to " the 1st input part ") of door 101, input Hi signal when the 2nd integrated value exceedes threshold value th2, in the 2nd integrated value lower than inputting Low signal when threshold value th2.In addition, with another input part (hereinafter, referred to as " the 2nd input part ") of door 101, Hi signal is inputted when the variable quantity of the 1st integrated value exceedes threshold value th3, at variable quantity lower than inputting Low signal when threshold value th3.
Further, with the 1st input part of door 101 in input Hi signal, and when inputting Hi signal in the 2nd input part, export Hi signal from the efferent with door 101.In addition, if input Low signal at least one input part in the 1st input part and the 2nd input part, then Low signal is inputted from the efferent with door 101.
In addition, or door 102 an input part (hereinafter, referred to as " the 3rd input part ") in, input Hi signal when the 1st integrated value exceedes threshold value th1, in the 1st integrated value lower than inputting Low signal when threshold value th1.In addition, or door 102 another input part (hereinafter, referred to as " the 4th input part ") in, input come from and the arbitrary signal in the Hi signal of the efferent of door 101 and Low signal.
Further, if or the 3rd input part of door 102 and the 4th input part at least one input part in input Hi signal, then or the efferent of door 102 export Hi signal.Its result, the drive singal of the determination information as deployment balloon 50 exports to driving circuit 40 by detection unit 112.In addition, if or the 3rd input part of door 102 and the input part of the 4th input part in input Low signal, then or the efferent of door 102 export Low signal.Its result, detection unit 112 does not carry out the output of drive singal to driving circuit 40.
(the 2nd embodiment)
Below, the 2nd embodiment is described.The difference of the 2nd embodiment and the 1st embodiment is: leading-out portion 111, on the basis of the variable quantity of derivation the 1st integrated value, the 2nd integrated value and the 1st integrated value, derives value below.That is, specific change amount is derived by leading-out portion 111, this specific change amount derives with the width (the width wd2 of the regulation such as, shown in Figure 11) narrower than the width (the width wd1 of regulation) of interval integral value when derivation variable quantity.Further, when the 2nd integrated value of front sensors 20 exceedes the specific threshold larger than the threshold value of regulation, for the decision condition of detection unit 112, changing unit 113 makes the judgement based on specific change amount effective.In addition, for other structures and process, with the structure of the 1st embodiment and process identical.Thus, omit structure and process describing of identical part.
(6, derivation process) based on the detected value of each sensor
Figure 10 is the figure representing the curve corresponding with the interval integral value of front sensors 20 and full integrated value.As shown in Figure 10, threshold value th2 and the specific threshold th2a larger than threshold value th2 is arranged to curve s11 and curve s12.
When vehicle 1 collides with obstacle in running at high speed, as shown in curve s11, because between the fixed time interval of t1 moment (amount of deceleration v1), integrated value exceedes threshold value th2, therefore for the decision condition of detection unit 112, changing unit 113 makes the judgement based on variable quantity effective.Further, due to t11 (amount of deceleration v11) after instant tl fixed time interval between integrated value exceed specific threshold th2a, therefore for the decision condition of detection unit 112, changing unit 113 makes the judgement based on specific change amount effective.
In addition, the change of curve s11 represents that vehicle 1 is with situation about colliding with obstacle at a high speed, even if but when the speed of vehicle 1 is high speed, because vehicle 1 is different with the state of the collision of obstacle, also there is the situation that can not exceed threshold value th2a and curve change.That is, also exist detection unit 112 not using specific change amount as decision condition, and determined whether as decision condition by variable quantity can the situation of deployment balloon.
Figure 11 is the figure be described the derivation of the specific change amount of front sensors 30.The variable quantity of the value (hereinafter, referred to as " the 3rd integrated value ") that leading-out portion 111 obtains carrying out interval integral using the width narrower than the integrating range of the 1st integrated value is derived as specific change amount.In detail, the difference of interval integral value when to carry out interval integral than the narrow width wd2 (such as, the width of 5ms) of width wd1 of regulation and adjacent interval integral value is derived specific change amount as variable quantity.Like this, owing to making the width carrying out interval integral become the narrow width wd2 of width wd1 than regulation, the derivation of variable quantity therefore can be carried out in the part (part be changed significantly) that the difference of an interval integral value and adjacent interval integral value is larger.In addition, for curve s2, also carry out the derivation process of specific change amount identically with curve s1.
Figure 12 is the figure representing the curve corresponding with the specific change amount of floor sensor 30 and full integrated value.In detail, the curve s1c of Figure 12 represents the value corresponding with the specific change amount of curve s1 and the full integrated value of curve s1, and curve s2c represents the value corresponding with the specific change amount of curve s2 and the full integrated value of curve s2.The transverse axis of Figure 12 represents full integrated value [m/s], and the longitudinal axis represents specific change amount [m/s
2].In addition, the curve s1c of Figure 12 and curve s2c represents the change of full integrated value every specified time (such as every 0.5ms) and interval integral value.
Further, as shown in figure 12, threshold value th3 is arranged to curve s1c and curve s2c.When vehicle 1 is to collide with obstacle at a high speed, as shown in curve s1c, derive the specific change amount exceeding threshold value th3.That is, due to the t12 moment (amount of deceleration v12) in the timing more Zao than the t2 moment (amount of deceleration v2) shown in Fig. 7, specific change amount exceedes threshold value th3, and therefore the drive singal of the determination information as deployment balloon 50 exports to driving circuit 40 by detection unit 112.
(7, sequential chart)
Figure 13 is the sequential chart of the value representing each sensor of vehicle 1 when colliding with obstacle in running at high speed.With the difference of the sequential chart of Fig. 8 be: on the basis of the value of each sensor of Fig. 8, add signal sg11 and signal sg21, this signal sg11 represents the 2nd integrated value of front sensors 20 and the relation of specific threshold th2a, and this signal sg21 represents the relation of the specific change amount of floor sensor 30 and the threshold value th3 of regulation.
Because the 2nd integrated value exceedes threshold value th2, therefore signal sg1 becomes ON state in the t1 moment.Further, for the decision condition of detection unit 112, changing unit 113 makes the judgement based on variable quantity effective, and afterwards, because the 3rd integrated value t11 moment after instant tl exceedes specific threshold th2a, therefore signal sg11 becomes the state of ON.Its result, for the decision condition of detection unit 112, changing unit 113 makes the judgement based on specific change amount effective.
Further, because the t12 moment of specific change amount after the t11 moment and before the t2 moment exceedes threshold value th3, therefore signal sg21 becomes ON state.Thus, the drive singal of the determination information as deployment balloon 50 exports to driving circuit 40 by detection unit 112.
Like this, due to when the 2nd integrated value of front sensors 20 exceedes specific threshold th2a, detection unit 112 determines whether based on the specific change amount of floor sensor 30 can deployment balloon 50, therefore, determine whether compared with the situation of deployment balloon 50, can to catch the change of impact conditions more significantly with the variable quantity of the 1st integrated value based on floor sensor 30.In addition, when the user of vehicle needs air bag 50, user can be protected with more suitable timing deployment balloon 50.
(8, logical circuitry)
Figure 14 be represent detection unit 112 determine whether can deployment balloon when the figure of decision circuit.1st difference of Figure 14 and Fig. 9 is: new setting and door 103 in logic circuits.In addition, the 2nd difference is: any one signal the Hi signal exported from the efferent with door 103 and Low signal, input to or door 102a the input part (hereinafter, referred to as " 5th input part ") different from the 3rd input part and the 4th input part in.Other aspects are structures identical with the decision circuit illustrated in fig .9.
With door 103, there is two input parts and an efferent.With an input part (hereinafter referred to " the 6th input part ") of door 103, input Hi signal when the 3rd integrated value exceedes threshold value th2a, in the 3rd integrated value lower than inputting Low signal when threshold value th2a.In addition, with another input part of door 103 (below, be called " the 7th input part ") in, input Hi signal when the specific change amount of the 1st integrated value exceedes threshold value th3, in specific change amount lower than inputting Low signal when threshold value th3.
Further, with the 6th input part of door 103 in input Hi signal, and when inputting Hi signal in the 7th input part, export Hi signal from the efferent with door 103.In addition, if input Low signal at least one input part in the 6th input part and the 7th input part, then Low signal is inputted from the efferent with door 103.
Further, if or the 3rd input part of door 102a, the 4th input part and the 5th input part at least one input part in input Hi signal, then or the efferent of door 102a export Hi signal.Its result, the drive singal of the determination information as deployment balloon 50 exports to driving circuit 40 by detection unit 112.In addition, if or the 3rd input part of door 102a, the 4th input part and the 5th input part in input Low signal, then or the efferent of door 102a export Low signal.Its result, detection unit 112 does not carry out the output of drive singal to driving circuit 40.
Claims (4)
1. an air-bag control device, it has:
Acquiring unit, it obtains the 1st detected value and the 2nd detected value from the 1st detecting unit and the 2nd detecting unit, the car that 1st detecting unit is arranged on vehicle is indoor, aforementioned 1st detected value of impact degree when derivation expression aforementioned vehicle and obstacle collide, 2nd detecting unit is configured in the front portion of aforementioned vehicle, aforementioned 2nd detected value of impact degree when derivation expression aforementioned vehicle and obstacle collide;
Lead-out unit, it carries out interval integral to aforementioned 1st detected value and derives the 1st integrated value, and derives the variable quantity of aforementioned 1st integrated value, carries out aforementioned interval integral and derive the 2nd integrated value to aforementioned 2nd detected value;
Identifying unit, it determines whether to launch based on aforementioned 1st integrated value the air bag that aforementioned vehicle has; And
Output unit, the driving circuit of the determination information being used for launching aforementioned air bag obtained by aforementioned identifying unit to the expansion controlling aforementioned air bag exports by it,
It is characterized in that,
When aforementioned 2nd integrated value exceedes the threshold value of regulation, aforementioned identifying unit determines whether to launch aforementioned air bag based on aforementioned variable quantity.
2. air-bag control device according to claim 1, is characterized in that,
Aforementioned lead-out unit derives specific change amount, and this specific change amount is the variable quantity of the 3rd integrated value, and the 3rd integrated value is carried out interval integral with the width narrower than the integrating range of aforementioned 1st integrated value to aforementioned 1st detected value and obtained,
When aforementioned 2nd integrated value exceedes the specific threshold larger than the threshold value of aforementioned regulation, aforementioned identifying unit determines whether to launch aforementioned air bag based on aforementioned specific change amount.
3. an air-bag control device, it has:
1st detecting unit, its car being arranged on vehicle is indoor, the 1st detected value of impact degree when derivation expression aforementioned vehicle and obstacle collide;
Driving circuit, it controls the expansion of the air bag that aforementioned vehicle has; And
Control setup, it determines whether to launch aforementioned air bag, is exported by determination information, it is characterized in that to aforementioned driving circuit,
Foregoing control device has:
Acquiring unit, it obtains aforementioned 1st detected value and the 2nd detected value from aforementioned 1st detecting unit and the 2nd detecting unit, 2nd detecting unit is configured in the front portion of aforementioned vehicle, aforementioned 2nd detected value of impact degree when derivation expression aforementioned vehicle and obstacle collide;
Lead-out unit, it carries out interval integral to aforementioned 1st detected value and derives the 1st integrated value, and derives the variable quantity of aforementioned 1st integrated value, carries out aforementioned interval integral and derive the 2nd integrated value to aforementioned 2nd detected value;
Identifying unit, it determines whether to launch air bag that aforementioned vehicle has based on aforementioned 1st integrated value; And
Output unit, the aforementioned determination information being used for launching aforementioned air bag obtained by aforementioned identifying unit exports to aforementioned driving circuit by it,
When aforementioned 2nd integrated value exceedes the threshold value of regulation, aforementioned identifying unit determines whether to launch aforementioned air bag based on aforementioned variable quantity.
4. an air bag controlled method, it has following operation:
A () obtains the 1st detected value and the 2nd detected value from the 1st detecting unit and the 2nd detecting unit, the car that 1st detecting unit is arranged on vehicle is indoor, aforementioned 1st detected value of impact degree when derivation expression aforementioned vehicle and obstacle collide, 2nd detecting unit is configured in the front portion of aforementioned vehicle, aforementioned 2nd detected value of impact degree when derivation expression aforementioned vehicle and obstacle collide;
B () carries out interval integral to aforementioned 1st detected value and derives the 1st integrated value, and derive the variable quantity of aforementioned 1st integrated value, carries out aforementioned interval integral and derive the 2nd integrated value to aforementioned 2nd detected value;
C () determines whether to launch air bag that aforementioned vehicle has based on aforementioned 1st integrated value; And
The d driving circuit output of determination information to the expansion of the aforementioned air bag of control for launching aforementioned air bag that () will be obtained by foregoing sequence (c),
It is characterized in that,
When aforementioned 2nd integrated value exceedes the threshold value of regulation, in foregoing sequence (c), determine whether to launch aforementioned air bag based on aforementioned variable quantity.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-247380 | 2011-11-11 | ||
| JP2011247380A JP5792030B2 (en) | 2011-11-11 | 2011-11-11 | Air bag control device and air bag control method |
Publications (2)
| Publication Number | Publication Date |
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| CN103101502A CN103101502A (en) | 2013-05-15 |
| CN103101502B true CN103101502B (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210093141.3A Expired - Fee Related CN103101502B (en) | 2011-11-11 | 2012-03-31 | Air-bag control device and air bag controlled method |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5792030B2 (en) |
| CN (1) | CN103101502B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2013103547A (en) | 2013-05-30 |
| CN103101502A (en) | 2013-05-15 |
| JP5792030B2 (en) | 2015-10-07 |
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