CN103101502A - Air bag control device and air bag control method - Google Patents
Air bag control device and air bag control method Download PDFInfo
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- CN103101502A CN103101502A CN2012100931413A CN201210093141A CN103101502A CN 103101502 A CN103101502 A CN 103101502A CN 2012100931413 A CN2012100931413 A CN 2012100931413A CN 201210093141 A CN201210093141 A CN 201210093141A CN 103101502 A CN103101502 A CN 103101502A
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Abstract
The invention provides an air bag control device and an air bag control method. A determination method for air bag unfolding corresponding to a collision condition of a vehicle and an obstacle optimizes unfolding timing of the air bag. The air bag control device determines whether an air bag can be unfolded based on a value via interval integral of detection values of a front sensor. Furthermore, under the condition that the value via interval integral of the detection values of the front sensor exceeds a specified threshold value, whether the air bag can be unfolded, determination based on a change amount via interval integral of the detection values of the floor front sensor is made to be efficient. Therefore, shock state can be greatly captured, under the condition that a user of the vehicle needs the air bag, the air bag can be unfolded as soon as possible to protect the user.
Description
Technical field
The present invention relates to a kind of in the situation that the airbag deployment that vehicle and obstacle bump is controlled.
Background technology
Current, in the situation that vehicle and obstacle bump, the expansion that air-bag control device utilizes following structure to carry out the air bag that vehicle has is controlled.In the situation that the Vehicular body front of vehicle has the sensor of deriving the impact degree that vehicle and obstacle bump (below be called " front sensors "), and the sensor (below be called " floor sensor ") that is arranged on the indoor and impact degree in situation that derivation vehicle and obstacle bump of car.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 of regulation (following also referred to as " anterior threshold value "), the corresponding threshold value of value (following also referred to as " floor threshold value ") that change obtains with the detected value of floor sensor is carried out interval integral.That is to say, according to the interval integral value of front sensors and the corresponding relation of anterior threshold value, change is worth corresponding floor threshold value with the interval integral of floor sensor.And forwardly the interval integral value of sensor surpasses anterior threshold value, and the interval integral value of floor sensor makes the control of airbag deployment in the situation of floor threshold value.
Specifically, forwardly the interval integral value of sensor surpasses in the situation of the max-thresholds in a plurality of anterior threshold values, makes the corresponding threshold value of interval integral value with floor sensor become less threshold value.And, in the situation that the interval integral value of floor sensor surpasses less threshold value, be arranged on the airbag deployment in vehicle.Like this; forwardly the interval integral value of sensor surpasses in the situation of max-thresholds; protect as early as possible passenger's essentiality high; make the floor threshold value of floor sensor become less threshold value; the timing adjustment that the interval integral value of floor sensor is surpassed the floor threshold value be the timing of morning, carries out the control of deployment balloon as early as possible.In addition,, there is patent documentation 1 in the data of technology related to the present invention as an illustration.
Patent documentation 1: TOHKEMY 2000-255374 communique
Summary of the invention
But, even the interval integral value according to front sensors, to change to less threshold value with the interval integral value corresponding floor threshold value of floor sensor, still exist because the collision status of vehicle and obstacle is different, the interval integral value of floor sensor surpasses the situation that the floor threshold value needs the regular hour.For example, vehicle and obstacle without lateral excursion from roughly positive " head-on crash " that bumps and vehicle and obstacle from roughly positive bump and the part of collision each other therefrom the mind-set lateral excursion bump in situations such as " offset collisions ", sometimes carry out airbag deployment described as follows and control.That is to say, although the increment rate of the interval integral value of front sensors is larger, surpass the time of anterior threshold value early, until the interval integral value of floor sensor still needs the regular hour before surpassing the floor threshold value.Its result is not carried out the expansion of air bag in the timing that should launch, and has the possibility of the expansion delay of air bag.
The object of the present invention is to provide a kind of air-bag control device and air bag controlled method, the corresponding and decision method of change airbag deployment of its crash behavior with vehicle and obstacle, the expansion that makes air bag is optimization regularly.
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, it is indoor that the 1st detecting unit is arranged on the car of vehicle, aforementioned the 1st detected value of the impact degree in the situation that induced representation aforementioned vehicle and obstacle bump, the 2nd detecting unit is configured in the front portion of aforementioned vehicle, aforementioned the 2nd detected value of the impact degree in the situation that induced representation aforementioned vehicle and obstacle bump; Lead-out unit, it carries out interval integral and derives the 1st integrated value aforementioned the 1st detected value, and derives the variable quantity of aforementioned the 1st integrated value, and aforementioned the 2nd detected value is carried out aforementioned interval integral and derives the 2nd integrated value; Identifying unit, it determines whether based on aforementioned the 1st integrated value can launch the air bag that aforementioned vehicle has; And output unit, it will be by exporting to the driving circuit of the expansion of controlling aforementioned air bag for the determination information that launches aforementioned air bag that aforementioned identifying unit obtains, it is characterized in that, in the situation that aforementioned the 2nd integrated value surpasses the threshold value of regulation, aforementioned identifying unit determines whether based on aforementioned variable quantity can launch aforementioned air bag.
Aforementioned lead-out unit is derived the specific change amount, this specific change amount is the variable quantity of the 3rd integrated value, the 3rd integrated value is carried out interval integral with the width narrower than the integrating range of aforementioned the 1st integrated value to aforementioned the 1st detected value and is obtained, in the situation that aforementioned the 2nd integrated value surpasses the specific threshold larger than the threshold value of aforementioned regulation, aforementioned identifying unit determines whether based on aforementioned specific change amount can launch aforementioned air bag.
In addition, the invention provides a kind of air-bag control device, it has: the 1st detecting unit, and its car that is arranged on vehicle is indoor, the 1st detected value of the impact degree in the situation that induced representation aforementioned vehicle and obstacle bump; Driving circuit, its expansion to the air bag that aforementioned vehicle has is controlled; And control setup, it determines whether and can launch aforementioned air bag, determination information is exported to aforementioned driving circuit, it is characterized in that, aforementioned control setup has: acquiring unit, it obtains aforementioned the 1st detected value and aforementioned the 2nd detected value from aforementioned the 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 the impact degree in the situation that induced representation aforementioned vehicle and obstacle bump; Lead-out unit, it carries out interval integral and derives the 1st integrated value aforementioned the 1st detected value, and derives the variable quantity of aforementioned the 1st integrated value, and aforementioned the 2nd detected value is carried out aforementioned interval integral and derives the 2nd integrated value; Identifying unit, it determines whether based on aforementioned the 1st integrated value can launch air bag that aforementioned vehicle has; And output unit, it will be exported to aforementioned driving circuit by the aforementioned determination information for launching aforementioned air bag that aforementioned identifying unit obtains, in the situation that aforementioned the 2nd integrated value surpasses the threshold value of regulation, aforementioned identifying unit determines whether based on aforementioned variable quantity can launch aforementioned air bag.
And, the invention provides a kind of air bag controlled method, it has following operation: (a) obtain the 1st detected value and the 2nd detected value from the 1st detecting unit and the 2nd detecting unit, it is indoor that the 1st detecting unit is arranged on the car of vehicle, aforementioned the 1st detected value of the impact degree in the situation that induced representation aforementioned vehicle and obstacle bump, the 2nd detecting unit is configured in the front portion of aforementioned vehicle, aforementioned the 2nd detected value of the impact degree in the situation that induced representation aforementioned vehicle and obstacle bump; (b) aforementioned the 1st detected value carried out interval integral and derives the 1st integrated value, and deriving the variable quantity of aforementioned the 1st integrated value, aforementioned the 2nd detected value is carried out aforementioned interval integral and derives the 2nd integrated value; (c) determine whether based on aforementioned the 1st integrated value and can launch air bag that aforementioned vehicle has; And (d) will be by exporting to the driving circuit of the expansion of controlling aforementioned air bag for the determination information that launches aforementioned air bag that aforementioned operation (c) obtains, it is characterized in that, in the situation that aforementioned the 2nd integrated value surpasses the threshold value of regulation, in aforementioned operation (c), determine whether based on aforementioned variable quantity and can launch aforementioned air bag.
The effect of invention
According to the present invention, surpass due to the interval integral value of the detected value of sensor forwardly in the situation of threshold value of regulation, determining whether based on the variable quantity of the integrated value of floor sensor can deployment balloon, therefore with interval integral value based on the detected value of floor sensor determine whether can deployment balloon situation compare, can catch significantly the state of collision.In addition, in the situation that the user of vehicle needs air bag, deployment balloon and protect the user as soon as possible.
In addition, according to the present invention, because the interval integral value of the detected value of sensor forwardly surpasses in the situation of the specific threshold larger than the threshold value of regulation, determining whether based on the specific change amount of the integrated value of floor sensor can deployment balloon, therefore with variable quantity based on the integrated value of floor sensor determine whether can deployment balloon situation compare, can judge the variation of collision status more early stagely.In addition, in the situation that the user of vehicle needs air bag, can protect the user with more suitable timing deployment balloon.
Description of drawings
Fig. 1 means the figure of the configuration of the floor sensor that comprises in front sensors that vehicle has and ECU.
Fig. 2 is the block diagram that mainly has the system of front sensors, air bag and ECU.
Fig. 3 means the figure of the detected value of floor sensor.
Fig. 4 means the figure that the interval integral of the detected value of floor sensor is processed.
Fig. 5 means the figure of the curve corresponding with the interval integral value of floor sensor and full integrated value.
Fig. 6 means the figure of the curve corresponding with the interval integral value of front sensors and full integrated value.
Fig. 7 means the figure of the curve corresponding with the variable quantity of the 1st integrated value of floor sensor and full integrated value.
Fig. 8 means vehicle in the situation that the sequential chart of the signal of each sensor that bumps with obstacle in running at high speed.
Fig. 9 means that detection unit determines whether the figure of the decision circuit in can the situation of deployment balloon.
Figure 10 means the figure of the curve corresponding with the interval integral value of front sensors and full integrated value.
Figure 11 is the figure that the derivation to the specific change amount of floor sensor describes.
Figure 12 means the figure of the curve corresponding with the specific change amount of floor sensor and full integrated value.
Figure 13 means vehicle in the situation that the sequential chart of the value of each sensor that bumps with obstacle in running at high speed.
Figure 14 means that detection unit determines whether the figure of the decision circuit in can the situation of deployment balloon.
The specific embodiment
Below, with reference to accompanying drawing on one side embodiments of the present invention described on one side.Below shown in embodiment be illustration, be not that technical scope of the present invention is defined in these.
(the 1st embodiment)
(1, each sensor layout circle)
Fig. 1 means the front sensors 20 (front sensors 20a and front sensors 20b) that vehicle 1 has and the figure that is included in the configuration of the floor sensor 30 in ECU (Electronic Control Unit) 3.
Front sensors 20a and front sensors 20b are 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.And near the side member equipotential that reaches of radiator support element that each sensor is separately positioned on vehicle 1 is set up.
It is indoor that floor sensor 30 is configured in the car of vehicle 1, and be configured in the floor tunnel section of the substantial middle that is positioned at vehicle 1.In addition, floor sensor 30 is arranged in ECU 3.
(2, block diagram)
Fig. 2 is the block diagram that mainly has the system of front sensors 20a, 20b, air bag 50 and ECU 3.
The deceleration/decel of the impact degree in the situation that front sensors 20a and 20b bump to expression vehicle 1 and obstacle detects.Here, so-called deceleration/decel is in the situation that vehicle 1 and the speed that obstacle bumps and lost in every 1 second are the acceleration/accels of negative value.
Air bag 50 is to send in air bag by the gas that will produce due to the gunpowder explosion of inside, thereby will be to the device as the passenger's of vehicle 1 user's impact absorption.In addition, air bag 50 has the firing unit 501 as ignition device in inside, makes firing unit 501 energising and makes the gunpowder explosion of air bag 50 inside.
ECU 3 is devices that the impact degree in situation about bumping according to vehicle 1 and obstacle is controlled the expansion of air bag 50.In addition, ECU 3 has floor sensor 30, driving circuit 40 and control setup 9.
The deceleration/decel of the impact degree in the situation that the floor tunnel section of floor sensor 30 by vehicle 1 bumps to expression vehicle 1 and obstacle detects.
Driving circuit 40 is based on the driving signal of input/output circuitry 10 from ECU 3 described later (below be called I/O circuit 10) output and makes firing unit 501 alive circuits of air bag 50.
Control setup 9 mainly has input/output circuitry 10, CPU 11 (Central Processing Unit) and nonvolatile memory 12.
I/O circuit 10 obtains the deceleration/decel as front sensors 20 and floor sensor 30 detected detected values.In addition, I/O circuit 10 will be exported to driving circuit 40 from the driving signal of CPU 11.
The detected value of leading-out portion 111 couples of front sensors 20a, 20b carries out interval integral to be processed, integrated value between leading-out zone.Based on the larger detected value in these two sensors of front sensors 20a, 20b detected value separately, derive the interval integral value (following also referred to as " the 2nd integrated value ") of front sensors 20 here.In addition, leading-out portion 111 is also derived the full integrated value with the whole additions of interval integral value of front sensors 20.
In addition, the detected value of 111 pairs of floor sensors 30 of leading-out portion carries out integrated value (following also referred to as " the 1st integrated value ") between interval integral processing and leading-out zone.In addition, leading-out portion is also derived the full integrated value with the whole additions of interval integral value of floor sensor 30.
And, the variable quantity (following also referred to as " variable quantity ") that leading-out portion 111 is derived the 1st integrated value.That is to say, the detected value of 111 pairs of floor sensors 30 of leading-out portion carries out interval integral to be processed, and the variable quantity of an interval integral value and other interval integral values adjacent with this interval integral value is derived.In addition, for by the processing of integrated value between leading-out portion 111 leading-out zones and derive the processing of variable quantity, the back is described in detail.
Detection unit 112 determines whether based on the 1st integrated value can launch the air bag 50 that vehicle 1 has.That is to say, the 1st integrated value after the detected value with floor sensor 30 carries out interval integral over the threshold value of stipulating (for example, threshold value th1 shown in Figure 5) in situation, detection unit 112 is judged must carry out the expansion of air bag 50, via I/O circuit 10 to driving circuit 40 output drive signals.
In addition, as described later shown in, decision condition that can deployment balloon 50 for whether, under changing unit 113 made judgement actv. situation based on variable quantity, detection unit 112 determines whether based on this variable quantity can deployment balloon 50.Like this, can deployment balloon 50 owing to determining whether based on variable quantity, therefore with determine whether based on the 1st integrated value of floor sensor 30 can deployment balloon 50 situation compare, can catch significantly the state of collision.In addition, in the situation that the user of vehicle needs air bag 50, as soon as possible deployment balloon 50 and the protection user.
Forwardly the 2nd integrated value of sensor 20 surpasses in the situation of the threshold value (for example, threshold value th2 shown in Figure 6) of stipulating, changing unit 113 makes based on the judgement of variable quantity effective.That is to say, forwardly the 2nd integrated value of sensor 20 surpasses in the situation of threshold value, and 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.
Threshold data 121 is to carry out with detected value to each sensor the corresponding threshold data of value that obtains after the processing such as interval integral.For example, be equivalent to threshold value th1 shown in Figure 5, threshold value th2 shown in Figure 6 and threshold value th3 shown in Figure 7 etc.
(3, process based on the derivation of the detected value of each sensor)
Below, use curve describes detected value, interval integral value, the variable quantity of each sensor.Fig. 3 means the figure of the detected value of floor sensor 30.The transverse axis of Fig. 3 represents the time [ms], and the longitudinal axis represents deceleration/decel [m/s
2].
Curve s1 shown in Figure 3 and curve s2 represent the deceleration/decel of the vehicle 1 that begins to change along with time lapse when vehicle 1 and obstacle bump.Here, the difference of curve s1 and curve s2 is that the speed when for example vehicle 1 bumps from obstacle is different.That is to say the curve s1 (curve that bumps with obstacle during for example 50km/h～60km/h) travels that is vehicle 1 in the situation that at a high speed.In addition, the curve s2 (curve that bumps with obstacle during for example 10km/h～20km/h) travels that is vehicle 1 in the situation that low speed.
Fig. 4 means the figure that the interval integral of the detected value of floor sensor 30 is processed.That is, Fig. 4 is to process the figure that describes based on the interval integral of curve s1 shown in Figure 3 and curve s2, as an example, shows the state that leading-out portion 111 will be derived as the interval integral value of the curve s1 of the detected value of floor sensor 30.Interval integral is processed: 111 couples of curve s1 of leading-out portion carry out interval integral in the width wd1 (for example width of 10ms) of regulation, derive 1st integrated value corresponding with the integrated value of a width.In addition, leading-out portion 111 is derived the full integrated value of the whole additions of integrated value of each width.In addition, for curve s2, also carry out in the same manner the derivation processing of interval integral value and full integrated value with curve s1.
Fig. 5 is the figure that the action that determines whether based on the 1st integrated value in can the situation of deployment balloon is described, and means the figure of 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 is the amount of deceleration [m/s] that begins the vehicle 1 till the certain hour (for example, the certain hour of the time gap of every 0.5ms) when vehicle 1 and obstacle bump.In addition, the interval integral value of the longitudinal axis is after vehicle 1 and obstacle bump, and carries out value after interval integral, expression deceleration/decel [m/s with the width of regulation within a certain period of time
2].That is to say, curve s1a shown in Figure 5 and curve s2a represent every the full integrated value of specified time (for example every 0.5ms) and the variation of interval integral value.
And, as shown in Figure 5, curve s1a and curve s2a are arranged threshold value th1.Threshold value th1 is corresponding with full integrated value and interval integral value, as shown in phantom in Figure 5, its value is set between curve s1a and s2a, so that in the situation that make airbag deployment (being referred to as the ON condition) with bump with obstacle at a high speed (curve s1a), in the situation that with low speed and obstacle bump (curve s2a) do not make airbag deployment (being referred to as the OFF condition).
In the situation that vehicle 1 to bump with obstacle at a high speed, as shown in curve s1a, is derived the interval integral value that surpasses threshold value th1.That is to say, due in the constantly timing of (amount of deceleration v11) of t3, the 1st integrated value surpasses threshold value th1, so detection unit 112 will be as the driving signal of the determination information of deployment balloon 50 to driving circuit 40 outputs.
On the other hand, in the situation that vehicle 1 bumps with low speed and obstacle, as shown in curve s2a, derive the interval integral value lower than threshold value th1.That is to say, due to the 1st integrated value that does not derive over threshold value th1, so detection unit 112 is not exported the driving signal of deployment balloon 50 to driving circuit 40.
Fig. 6 means the figure of 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].And curve s11 shown in Figure 6 and curve s12 represent every the full integrated value of specified time (for example every 0.5ms) and the variation of interval integral value.Like this, by with the detected value of floor sensor 30 two-dimensional representation with full integrated value and interval integral value, thereby can setting threshold th1 to satisfy ON condition and OFF condition, if the interval integral value of floor sensor 30 i.e. the 1st integrated value surpasses threshold value th1, detection unit 112 is exported the driving signal of deployment balloon 50 to driving circuit 40.But, in the collision determination that is only undertaken by the 1st integrated value, exist the expansion of air bag to produce situation about postponing.Thus, introduce the judgement of being undertaken by variable quantity described below.
The curve s11 of Fig. 6 (curve that bumps with obstacle during for example 50km/h～60km/h) travels that is vehicle 1 in the situation that at a high speed.In addition, the curve s12 (curve that bumps with obstacle during for example 10km/h～20km/h) travels that is vehicle 1 in the situation that low speed.
And, as shown in Figure 6, with Fig. 5 in the same manner, curve s11 and curve s12 are arranged threshold value th2, it is used for making ON condition and OFF condition to satisfy, and switches to the judgement of being undertaken by variable quantity.In the situation that vehicle 1 bumps with obstacle, as shown in curve s11, derive the interval integral value that surpasses threshold value th2 in running at high speed.That is to say, because timing the 2nd integrated value in the t1 moment (amount of deceleration v1) surpasses threshold value th2, so changing unit 113 makes based on the judgement of variable quantity effective.
In addition, in the situation that vehicle 1 bumps with obstacle, as shown in curve s12, derive the interval integral value lower than threshold value th2 in low speed driving.That is to say, owing to not deriving the 2nd integrated value that surpasses threshold value th2, so detection unit 112 the 1st integrated value is determined whether as decision condition can deployment balloon 50.
And, the passing of curve s11 represents the situation that vehicle 1 bumps with high speed and obstacle, even but in the situation that the speed of vehicle 1 is high-speed, because the state of the collision of vehicle 1 and obstacle is different, also exist can not surpass threshold value th2 and situation that curve is passed.That is, also exist detection unit 112 not with variable quantity as decision condition, and with the 1st integrated value as decision condition determine whether can deployment balloon situation.
Fig. 7 means the figure of 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 is the amount of deceleration that begins the vehicle 1 till the certain hour when vehicle 1 and obstacle bump.In addition, the variable quantity of the longitudinal axis is that the width of stipulating carries out the variable quantity of interval integral to the detected value of floor sensor 30.In detail, be that width wd1 with regulation shown in Figure 4 carries out interval integral value in each interval integral of integration and the difference of adjacent interval integral value.Like this, curve s1b shown in Figure 7 and curve s2b represent every the full integrated value of specified time (for example every 0.5ms) and the variation of interval integral value.
And, as shown in Figure 7, curve s1b and curve s2b are arranged threshold value th3.In the situation that vehicle 1 to bump with obstacle at a high speed, as shown in curve s1b, is derived the variable quantity that surpasses threshold value th3.That is to say, due in the constantly timing of (amount of deceleration v2) of t2, variable quantity surpasses threshold value th3, so detection unit 112 will be as the driving signal of the determination information of deployment balloon 50 to driving circuit 40 outputs.
In addition, in the situation that vehicle 1 with low speed collision, as shown in curve s2b, is derived the variable quantity lower than threshold value th3.That is to say, due to the variable quantity of not deriving over threshold value th3, so detection unit 112 is not exported the driving signal of deployment balloon 50 to driving circuit 40.
(4, sequential chart)
Fig. 8 means vehicle 1 in the situation that the sequential chart of the signal of each sensor that bumps with obstacle in running at high speed.In Fig. 8, show the signal sg3 of the relation of the 1st integrated value of signal sg2, expression floor sensor 30 of the relation of the variable quantity of the 1st integrated value of signal sg1, expression floor sensor 30 of the relation of expression the 2nd integrated value of front sensors 20 and threshold value th2 and threshold value th3 and threshold value th1.And, be the state that the value that becomes sensor under the state of ON surpasses corresponding threshold value at each signal, becoming the value of sensor lower than the state of the threshold value of correspondence under the state of OFF.
At first, due to from t0 constantly till the t1 the 2nd integrated value (curve s11) can not surpass threshold value th2 and pass, therefore signal sg1 shown in Figure 8 keeps the state of OFF always and passes.Thus, from t0 constantly to t1 constantly during in, the judgement of the expansion of the air bag 50 that is undertaken by detection unit 112 is carried out based on the 1st integrated value of floor sensor 30.And because signal sg3 shown in Figure 8 is the OFF state from the t0 moment to t1 constantly, the 1st integrated value surpasses threshold value th1, does not therefore satisfy decision condition.In addition, corresponding with the 1st integrated value of floor sensor 30, the variable quantity (sg2) of also deriving the 1st integrated value.
And because the 2nd integrated value surpasses threshold value th2, so signal sg1 becomes the ON state constantly at t1.Its result, changing unit 113 make based on the judgement of the variable quantity corresponding with signal sg2 effective.
Then, as shown in Figure 8, due to the variable quantity corresponding with signal sg2 t1 constantly after and the t2 of t3 before constantly constantly surpass threshold value th3, so detection unit 112 will be exported to driving circuit 40 as the driving signal of the determination information of deployment balloon 50.
In addition, in the situation that supposition detection unit 112 with the 1st integrated value as determine whether can deployment balloon 50 decision condition, the 1st integrated value surpasses threshold value th1 constantly at t3, signal sg3 shown in Figure 8 becomes the ON state constantly at t3, but because t3 is the moment of t2 after the moment constantly, therefore, be the 1st integrated value in the situation that detection unit 112 makes decision condition, with variable quantity is compared as the situation of the decision condition of detection unit 112, to the delay on the control generation time of deployment balloon 50.
Thus, forwardly the 2nd integrated value of sensor 20 surpasses in the situation of threshold value th2, detection unit 112 determines whether based on the variable quantity of floor sensor 30 can deployment balloon 50, therefore with the 1st integrated value based on floor sensor 30 determine whether can deployment balloon 50 situation compare, can catch significantly the state of impact.In addition, in the situation that the user of vehicle needs air bag 50, as soon as possible deployment balloon 50 and the protection user.
(5, logical circuitry)
Fig. 9 means that detection unit 112 determines whether the figure of the decision circuit in can the situation of deployment balloon.Be provided with in decision circuit and door 101 and or door 102.Have two input parts and an efferent with door 101.In addition, or door 102 has two input parts and an efferent, with the efferent of door 101 with or two input parts in an input part electrically be connected.
With an input part of door 101 (below be called " the 1st input part ") in, in the situation that the 2nd integrated value surpasses threshold value th2 input Hi signal, in the situation that the 2nd integrated value is lower than threshold value th2 input Low signal.In addition, with another input part of door 101 (below, be called " the 2nd input part ") in, in the situation that the variable quantity of the 1st integrated value surpasses threshold value th3 input Hi signal, in the situation that variable quantity is lower than threshold value th3 input Low signal.
And, with the 1st input part of door 101 in input Hi signal, and in the situation that input Hi signal in the 2nd input part, from the efferent output Hi signal of door 101.In addition, if input Low signal at least one input part in the 1st input part and the 2nd input part, from would inputting the Low signal with the efferent of door 101.
In addition, or a door input part of 102 (below, be called " the 3rd input part ") in, in the situation that the 1st integrated value surpasses threshold value th1 input Hi signal, in the situation that the 1st integrated value is lower than threshold value th1 input Low signal.In addition, or door another input part of 102 (below, be called " the 4th input part ") in, input comes from and the Hi signal of the efferent of door 101 and the arbitrary signal in the Low signal.
And, if or door 102 the 3rd input part and at least one input part in the 4th input part in input Hi signal, or the efferent of door 102 output Hi signal.Its result, detection unit 112 will be as the driving signal of the determination information of deployment balloon 50 to driving circuit 40 outputs.In addition, if or the input part of door 102 the 3rd input part and the 4th input part in input Low signal, or the efferent of door 102 output Low signal.Its result, detection unit 112 do not drive signal to the output of 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 is derived following value on the basis of the variable quantity of deriving the 1st integrated value, the 2nd integrated value and the 1st integrated value.That is to say, derive the specific change amount by leading-out portion 111, this specific change amount is to derive with the width (for example, the width wd2 of regulation shown in Figure 11) narrower than the width (the width wd1 of regulation) of the interval integral value in the situation that derives variable quantity.And forwardly the 2nd integrated value of sensor 20 surpasses in the situation of the specific threshold larger than the threshold value of regulation, and for the decision condition of detection unit 112, changing unit 113 makes based on the judgement of specific change amount effective.In addition, for other structures and processing, with the structure of the 1st embodiment and process identical.Thus, omit structure and process the narration of identical part.
(6, process based on the derivation of the detected value of each sensor)
Figure 10 means the figure of the curve corresponding with the interval integral value of front sensors 20 and full integrated value.As shown in figure 10, curve s11 and curve s12 are arranged threshold value th2 and the specific threshold th2a larger than threshold value th2.
In the situation that vehicle 1 bumps with obstacle in running at high speed, as shown in curve s11, because integrated value between the fixed time interval in the t1 moment (amount of deceleration v1) surpasses threshold value th2, therefore for the decision condition of detection unit 112, changing unit 113 makes based on the judgement of variable quantity effective.And because integrated value between the fixed time interval of the t11 (amount of deceleration v11) of t1 after the moment surpasses specific threshold th2a, therefore for the decision condition of detection unit 112, changing unit 113 makes based on the judgement of specific change amount effective.
In addition, the variation of curve s11 represents the situation that vehicle 1 bumps with high speed and obstacle, even but in the situation that the speed of vehicle 1 is at a high speed, because the state of the collision of vehicle 1 and obstacle is different, also exists and can surpass threshold value th2a and the situation of curve change.That is, also exist detection unit 112 not with the specific change amount as decision condition, and with variable quantity as decision condition determine whether can deployment balloon situation.
Figure 11 is the figure that the derivation to the specific change amount of front sensors 30 describes.Leading-out portion 111 will carry out interval integral with the width narrower than the integrating range of the 1st integrated value and the variable quantity of the value that obtains (below, be called " the 3rd integrated value ") is derived as the specific change amount.In detail, will carry out with the narrow width wd2 (for example, the width of 5ms) of width wd1 than regulation interval integral value in the situation of interval integral and the difference of adjacent interval integral value and derive the specific change amount as variable quantity.Therefore like this, owing to making the width that carries out interval integral become the narrow width wd2 of width wd1 than regulation, can carry out the derivation of variable quantity in the larger part (part that is changed significantly) of difference of an interval integral value and adjacent interval integral value.In addition, for curve s2, also carry out in the same manner the derivation processing of specific change amount with curve s1.
Figure 12 means the figure of 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 full integrated value of the specific change amount of curve s1 and curve s1, and curve s2c represents the value corresponding with the full integrated value of the specific change amount of curve s2 and 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 represent every the full integrated value of specified time (for example every 0.5ms) and the variation of interval integral value.
And, as shown in figure 12, curve s1c and curve s2c are arranged threshold value th3.In the situation that vehicle 1 to bump with obstacle at a high speed, as shown in curve s1c, is derived the specific change amount that surpasses threshold value th3.That is to say, due to the t12 moment (amount of deceleration v12) in the timing more Zao than the t2 moment (amount of deceleration v2) shown in Figure 7, the specific change amount surpasses threshold value th3, so detection unit 112 will be as the driving signal of the determination information of deployment balloon 50 to driving circuit 40 outputs.
(7, sequential chart)
Figure 13 means vehicle 1 in the situation that the sequential chart of the value of each sensor that bumps 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, signal sg11 and signal sg21 have been increased, 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 threshold value th3 of the specific change amount of floor sensor 30 and regulation.
Because the 2nd integrated value surpasses threshold value th2, so signal sg1 becomes the ON state constantly at t1.And for the decision condition of detection unit 112, changing unit 113 makes based on the judgement of variable quantity effective, and afterwards, because the 3rd integrated value surpasses specific threshold th2a constantly at the t11 of t1 after the moment, so signal sg11 becomes the state of ON.Its result, for the decision condition of detection unit 112, changing unit 113 makes based on the judgement of specific change amount effective.
And, due to the specific change amount t11 constantly after and the t12 of t2 before constantly constantly over threshold value th3, so signal sg21 becomes the ON state.Thus, detection unit 112 will be as the driving signal of the determination information of deployment balloon 50 to driving circuit 40 outputs.
Like this, because the 2nd integrated value of sensor 20 forwardly surpasses in the situation of specific threshold th2a, detection unit 112 determines whether based on the specific change amount of floor sensor 30 can deployment balloon 50, therefore, with variable quantity based on the 1st integrated value of floor sensor 30 determine whether can deployment balloon 50 situation compare, can catch more significantly the variation of impact conditions.In addition, in the situation that the user of vehicle needs air bag 50, can protect with more suitable timing deployment balloon 50 user.
(8, logical circuitry)
Figure 14 means that detection unit 112 determines whether the figure of the decision circuit in can the situation of deployment balloon.The 1st difference of Figure 14 and Fig. 9 is: the new setting and door 103 in decision circuit.In addition, the 2nd difference is: from the Hi signal of the efferent of door 103 output and any signal the Low signal, input to or the input part different from the 3rd input part and the 4th input part of door 102a (below, be called " the 5th input part ") in.Other aspects be with in the identical structure of decision circuit illustrated in fig. 9.
Have two input parts and an efferent with door 103.With an input part of door 103 (below be called " the 6th input part ") in, in the situation that the 3rd integrated value surpasses the defeated Hi signal of threshold value th2a, in the situation that the 3rd integrated value is lower than threshold value th2a input Low signal.In addition, with another input part of door 103 (below, be called " the 7th input part ") in, in the situation that the specific change amount of the 1st integrated value surpasses the defeated Hi signal of threshold value th3, in the situation that the specific change amount is lower than threshold value th3 input Low signal.
And, with the 6th input part of door 103 in defeated Hi signal, and in the situation that defeated Hi signal in the 7th input part, from the efferent output Hi signal of door 103.In addition, if input Low signal at least one input part in the 6th input part and the 7th input part, from would inputting the Low signal with the efferent of door 103.
And, if or the 3rd input part, the 4th input part of door 102a, and the 5th input part at least one input part in defeated Hi signal, or the efferent output Hi signal of door 102a.Its result, detection unit 112 will be as the driving signal of the determination information of deployment balloon 50 to driving circuit 40 outputs.In addition, if or the 3rd input part, the 4th input part and the 5th input part of door 102a in input Low signal, or the efferent output Low signal of door 102a.Its result, detection unit 112 do not drive signal to the output of driving circuit 40.
Claims (4)
1. 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, it is indoor that the 1st detecting unit is arranged on the car of vehicle, aforementioned the 1st detected value of the impact degree in the situation that induced representation aforementioned vehicle and obstacle bump, the 2nd detecting unit is configured in the front portion of aforementioned vehicle, aforementioned the 2nd detected value of the impact degree in the situation that induced representation aforementioned vehicle and obstacle bump;
Lead-out unit, it carries out interval integral and derives the 1st integrated value aforementioned the 1st detected value, and derives the variable quantity of aforementioned the 1st integrated value, and aforementioned the 2nd detected value is carried out aforementioned interval integral and derives the 2nd integrated value;
Identifying unit, it determines whether based on aforementioned the 1st integrated value can launch the air bag that aforementioned vehicle has; And
Output unit, it will launch the determination information of aforementioned air bag to the driving circuit output of the expansion of controlling aforementioned air bag by aforementioned identifying unit being used for of obtaining,
It is characterized in that,
In the situation that aforementioned the 2nd integrated value surpasses the threshold value of regulation, aforementioned identifying unit determines whether based on aforementioned variable quantity can launch aforementioned air bag.
2. air-bag control device according to claim 1, is characterized in that,
Aforementioned lead-out unit is derived the 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 the 1st integrated value to aforementioned the 1st detected value and obtained,
In the situation that aforementioned the 2nd integrated value surpasses the specific threshold larger than the threshold value of aforementioned regulation, aforementioned identifying unit determines whether based on aforementioned specific change amount can launch aforementioned air bag.
3. air-bag control device, it has:
The 1st detecting unit, its car that is arranged on vehicle is indoor, the 1st detected value of the impact degree in the situation that induced representation aforementioned vehicle and obstacle bump;
Driving circuit, its expansion to the air bag that aforementioned vehicle has is controlled; And
Control setup, it determines whether and can launch aforementioned air bag, and determination information is exported to aforementioned driving circuit, it is characterized in that,
Aforementioned control setup has:
Acquiring unit, it obtains aforementioned the 1st detected value and aforementioned the 2nd detected value from aforementioned the 1st detecting unit and the 2nd detecting unit, the 2nd detecting unit is configured in the front portion of aforementioned vehicle, the 2nd detected value of the impact degree in the situation that induced representation aforementioned vehicle and obstacle bump;
Lead-out unit, it carries out interval integral and derives the 1st integrated value aforementioned the 1st detected value, and derives the variable quantity of aforementioned the 1st integrated value, and aforementioned the 2nd detected value is carried out aforementioned interval integral and derives the 2nd integrated value;
Identifying unit, it determines whether based on aforementioned the 1st integrated value can launch air bag that aforementioned vehicle has; And
Output unit, it will be exported to aforementioned driving circuit by the aforementioned determination information for launching aforementioned air bag that aforementioned identifying unit obtains,
In the situation that aforementioned the 2nd integrated value surpasses the threshold value of regulation, aforementioned identifying unit determines whether based on aforementioned variable quantity can launch aforementioned air bag.
4. air bag controlled method, it has following operation:
(a) obtain the 1st detected value and the 2nd detected value from the 1st detecting unit and the 2nd detecting unit, it is indoor that the 1st detecting unit is arranged on the car of vehicle, aforementioned the 1st detected value of the impact degree in the situation that induced representation aforementioned vehicle and obstacle bump, the 2nd detecting unit is configured in the front portion of aforementioned vehicle, aforementioned the 2nd detected value of the impact degree in the situation that induced representation aforementioned vehicle and obstacle bump;
(b) aforementioned the 1st detected value carried out interval integral and derives the 1st integrated value, and deriving the variable quantity of aforementioned the 1st integrated value, aforementioned the 2nd detected value is carried out aforementioned interval integral and derives the 2nd integrated value;
(c) determine whether based on aforementioned the 1st integrated value and can launch air bag that aforementioned vehicle has; And
(d) will launch the determination information of aforementioned air bag to the driving circuit output of the expansion of controlling aforementioned air bag by aforementioned operation (c) being used for of obtaining,
It is characterized in that,
In the situation that aforementioned the 2nd integrated value surpasses the threshold value of regulation, in aforementioned operation (c), determine whether based on aforementioned variable quantity and can launch aforementioned air bag.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011247380A JP5792030B2 (en) | 2011-11-11 | 2011-11-11 | Air bag control device and air bag control method |
| JP2011-247380 | 2011-11-11 |
Publications (2)
| Publication Number | Publication Date |
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| CN103101502A true CN103101502A (en) | 2013-05-15 |
| CN103101502B 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 |
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| Country | Link |
|---|---|
| JP (1) | JP5792030B2 (en) |
| CN (1) | CN103101502B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5792030B2 (en) | 2015-10-07 |
| CN103101502B (en) | 2015-11-18 |
| JP2013103547A (en) | 2013-05-30 |
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