CN103507735A - A method and apparatus for detecting, diagnosing, and triggering a trigger means of a personal protection means - Google Patents
A method and apparatus for detecting, diagnosing, and triggering a trigger means of a personal protection means Download PDFInfo
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- CN103507735A CN103507735A CN201310262947.5A CN201310262947A CN103507735A CN 103507735 A CN103507735 A CN 103507735A CN 201310262947 A CN201310262947 A CN 201310262947A CN 103507735 A CN103507735 A CN 103507735A
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- flip flop
- flop equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
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Abstract
The invention relates to a method for detecting a triggering means (120) for a vehicle occupant protection means (110) for a vehicle (100). The method comprises a step of evaluating a gradient of a trigger signal (150) for the triggering means (120) to determine a type of the triggering means (120).
Description
Technical field
The present invention relates to a kind of for identifying the method for the flip flop equipment of the personal protection means of vehicle; relate to a kind ofly for diagnosing the method, a kind of for triggering the method for flip flop equipment of flip flop equipment, relate to a kind of corresponding device and relate to a kind of corresponding computer program.
Background technology
Such as the passenger protection system of air bag igniting circuit by normalisation be connected with the firing unit with pyrotechnics, its operating gas producer and trigger thus safety air bag when energising.At this, use the firing unit of pyrotechnics electrically corresponding to ohm formula resistance.Yet firing circuit recently also can be connected with inductance, for example, for SAHR or anti-overturning steel cylinder
the LEA magnetic actuator of activation.LEA is the abbreviation of English concept " low energy actuator " (low-energy actuator) in this case.Blast that can origination point firearm in LEA magnetic actuator, but make actuator movements by the formed magnetic field of spark current.
Summary of the invention
Under this background; by means of the invention provides according to described in independent claims for identify method for the flip flop equipment of the personal protection means of vehicle, for diagnose flip flop equipment method, for trigger flip flop equipment method, for identify for the flip flop equipment of personal protection means, use for knowing the equipment of method for distinguishing; in addition, also proposed for trigger for the flip flop equipment of personal protection means, use the device of the method for triggering and finally proposed corresponding computer program.By dependent claims and follow-up specification sheets separately, draw favourable design plan.
The present invention is based on following knowledge, the dissimilar flip flop equipment for personal protection means has different firing circuits or the loading condition of trigger circuit, and has thus different trigger current curves.By means of trigger current, detect the type that can portray the feature of trigger current curve and determine during this period described flip flop equipment.Flip flop equipment for known type can reach by the short current time of optimum wasted power and the chip temperature of reduction.
A kind of have following steps for the method for identifying for the flip flop equipment of the personal protection means of vehicle:
Analyze the curve for the energizing signal of described flip flop equipment, to determine the type of described flip flop equipment.
Personal protection means can be applied in vehicle.Wherein, vehicle can be passenger vehicle, manned vehicle or motor bike.Personal protection means can be the headrest of for example safety air bag, belt stretcher, activation or the anti-overturning steel cylinder that can activate.Personal protection means can be activated or can be triggered by flip flop equipment by flip flop equipment.Flip flop equipment can be for example firing unit, the use firing unit of pyrotechnics and the combination of gas generator, LEA magnetic actuator or the magnetic actuator of firing unit, use pyrotechnics.LEA can be the abbreviation of English concept " low energy actuator ", and German is " niederenergetischer Aktor ", and wherein, LEA makes magnetic field only with lower energy fluence, to carry out switch.The type of flip flop equipment can be depicted as ohm formula resistance or an inductance by electrical specification.Thus, the type of flip flop equipment can be described by unique feature of ohm formula resistance or inductance.Especially, when applying energizing signal, flip flop equipment can depend on its type as ohm formula resistance or as action inductively.Energizing signal can be trigger current.Alternatively, energizing signal can be trigger voltage.The curve of energizing signal can be depicted as the curve in time of intensity of current of the electric current of the flip flop equipment of flowing through.The first curve of energizing signal can be associated with the first kind of flip flop equipment, and the second curve of energizing signal can be associated with the Second Type of flip flop equipment.The first curve and the second curve can for example be distinguished by the different slope of the positive rise after activating or energizing signal is provided.For each relevant type of flip flop equipment, unique feature of the curve of unique curve of energizing signal or the described uniqueness of described energizing signal described in cicada.Thus, the curve of described energizing signal is by making comparisons with the feature with known unique curve of for example having stored or uniqueness, to determine the type of described flip flop equipment.
Corresponding to a kind of form of implementation of the present invention, the type of described flip flop equipment is electrically depicted as ohm formula resistance or is inductance.Flip flop equipment such as firing unit can be characterized as the electric equivalent circuit with resistance.LEA magnetic actuator or magnetic actuator can be portrayed as having the electric equivalent circuit of coil.Described flip flop equipment can be divided into two types.Can be electrically corresponding with ohm formula resistance with the firing unit of pyrotechnics.Magnetic actuator can be corresponding with inductance.
For example, in the step of analyzing, the identification moment that arrives or surpass recognition threshold by energizing signal will be analyzed.The type of flip flop equipment can be determined in the situation that using identification constantly.Recognition threshold can be boundary value.For example, described recognition threshold represents current value or magnitude of voltage.The curve of energizing signal can reach or surpass described recognition threshold.The curve of described energizing signal reaches for the first time or moment of surpassing recognition threshold can be restricted to identification constantly.The amount that surpasses recognition threshold for the amount that surpasses curve that can be by energizing signal is described.Identification constantly can will provide described energizing signal at this initial time in time after initial time, for example realizes by unactivated state or value to the state of activation or the transformation of value.Described identification can be positioned at constantly in time simultaneously within the tolerance region of initial time.Occur that the moment that the first signal of the curve of described energizing signal changes is described as initial time.The change of energizing signal is greater than predefined tolerance region will be considered signal change.
When identification is constantly positioned within very first time interval, the type of flip flop equipment can be confirmed as an ohm formula resistance.In addition,, when described identification is constantly positioned within the second time gap, flip flop equipment can be confirmed as inductance.Wherein, after described the second time gap is arranged on described very first time interval in time.Described very first time interval can start when initial time.Described very first time interval and described the second time gap can arrange mutually with interval.
The other moment after being positioned at identification constantly provides breakdown signal when described energizing signal is positioned under recognition threshold will be favourable.After the described other moment can be arranged on described the second time gap in time.When being positioned under described recognition threshold at described initial time with between the described other moment enduringly, described energizing signal can provide described breakdown signal.While in addition, dropping under described recognition threshold, will provide described breakdown signal when described energizing signal reaches the described other moment.Replace the other moment also can use and be arranged in time described the second time gap other moment afterwards.Breakdown signal can be electric signal.Breakdown signal can represent the defect of described personal protection means.
A kind of for diagnosing the method for the flip flop equipment of personal protection means to comprise the following steps:
Implement for identifying the step for the method for the personal protection means of vehicle, to identify the type of described flip flop equipment;
The diagnostic method that selection is adjusted by the described type of described flip flop equipment; And
Carry out described diagnostic method, to diagnose described diagnostic device.
Described method can comprise the step that described diagnostic signal is provided.Wherein, described diagnostic signal can be placed in the value not reaching for the actual triggering of personal protection means, for example too small.For diagnosing the method for the flip flop equipment of personal protection means to be implemented as energizing signal with less electric current.Can will there is electric current that intensity of current is less than 100mA for described diagnosis.When known flip flop equipment is that while being electrically depicted as the flip flop equipment of ohm formula resistance, described energizing signal falls after rise after very first time section.On the contrary, when known flip flop equipment is inductance, energizing signal just can be fallen after rise after the second time period, described the second time period is greater than described very first time section.Thus, can consider the steady state characteristic of described energizing signal.So, for example in the situation that be depicted as the flip flop equipment of inductance can be to be electrically depicted as ohm time period that the flip flop equipment of formula resistance is longer and to apply electric current than known.For diagnosing the object of method of flip flop equipment to be the short as far as possible time, within the described time, apply described energizing signal, apply and/or flow through for example electric current.When only with the short time, apply and/or can be a little during current flowing heat described device, in described device, implement for diagnosing the method for flip flop equipment.Shorter current time when firing circuit measurement of resistance also can be contributed for less wasted power.Compared to the method for using longer current time, by shorter current time, can relatively bring the less silicon area for wasted power builder.This solution has the following advantages, current relay only the diagnosis wait the flip flop equipment of the diagnosing institute for separately must time just conducting.The chip temperature of chip that can make thus to have integrated circuit is lower, and the enforcement of described integrated circuit and described method moves relevantly.
A kind ofly for the method triggering for the flip flop equipment of personal protection means, comprise the following steps:
In first moment, be provided for the energizing signal of flip flop equipment;
Implement for identifying the step for the method for the flip flop equipment of the personal protection means of vehicle, to identify the type of described flip flop equipment; And
In second moment of being adjusted by the described type of described flip flop equipment, finish described energizing signal.
Triggering by described flip flop equipment can activate described personal protection means, is for example air bag igniting or implement anti-overturning steel cylinder.By finishing described energizing signal, can make energizing signal fall after rise or enter nonactivated state or be placed in a value.For example, when finishing described energizing signal, can interrupt the trigger current as energizing signal effect.For trigger for the method for the flip flop equipment of personal protection means can with for diagnosing the method for the flip flop equipment of personal protection means to combine.
A kind ofly for identifying equipment for the flip flop equipment of personal protection means, be constructed to carry out for identifying the step for the method for the flip flop equipment of the personal protection means of vehicle at the device of structure correspondingly.By of the present invention, take a kind of this enforcement modification that is form for the equipment of identifying for the flip flop equipment of personal protection means also can be fast and effectively solve the present invention based on task.
Current, for the equipment of identifying for the flip flop equipment of personal protection means, can be a kind of electric apparatus, be for example interpreted as control setup, its processes sensor signal and export accordingly control signal and/or data-signal.Described can have such interface for the equipment of identifying for the flip flop equipment of personal protection means, described interface by hardware ground and/or software construct.Among the structure of hardware, described interface can be for example a part of so-called system ASIC, and this system ASIC has the different function of described device.Yet, described interface be also self, integrated circuit or to be comprised of distributed component be at least in part also possible.When being structure according to software, described interface can be software module, and described software module is present on the microcontroller of the software module that also has other.
A kind of have with lower device for controlling the device of flip flop equipment:
For the device of energizing signal is provided;
For providing the device to described flip flop equipment by described energizing signal; And
For identifying the equipment of flip flop equipment.
It can be for example current source or voltage source or a switch that the device of energizing signal is provided, for example, the transistor of energizing signal is provided for release.For energizing signal is provided to the device of flip flop equipment and can have at least one point of connection, at this electric contact point place, can be connected with flip flop equipment.For energizing signal is provided to the device of flip flop equipment and can describe the interface to flip flop equipment thus.
The computer program with program code is also favourable, described program code can be stored in machine sensible carrier as on semiconductor memory, harddisk memory or optical memory and when this program product on computing machine or device while implementing by for carrying out according to the method as described in aforementioned form of implementation.
Accompanying drawing explanation
Below the accompanying drawing by means of appended is exemplarily at length set forth to the present invention.Wherein:
Fig. 1 show a kind of according to one embodiment of the present of invention, have for triggering the schematic diagram of vehicle of the device of flip flop equipment;
Fig. 2 shows according to the energizing signal of one embodiment of the present of invention curve in time;
Fig. 3 shows the schematic diagram for a kind of possible connection modification of the flip flop equipment according to one embodiment of the present of invention;
It is two separate energizing signal of intensity of current curve in time according to one embodiment of the present of invention that Fig. 4 a shows;
It is the graphic curve in time of two scale notation that Fig. 4 b shows according to two of one embodiment of the present of invention separate energizing signal;
Fig. 5 show for basis of characterization one embodiment of the present of invention, for the method for the flip flop equipment of the personal protection means of vehicle;
Fig. 6 show for diagnosis basis one embodiment of the present of invention, for the method for the flip flop equipment of the personal protection means of vehicle; And
Fig. 7 show for trigger according to one embodiment of the present of invention, for the method for the flip flop equipment of the personal protection means of vehicle.
In the description of ensuing preferred embodiment of the present invention, for shown in different accompanying drawings and act on similar element by using identical or similar Reference numeral, wherein, will avoid the description of the repetition of these elements.
The specific embodiment
Figure 1 illustrates the schematic diagram according to the vehicle 100 of one embodiment of the present of invention.In shown vehicle 100, be mounted with two personal protection means 110.a, 110.b, be associated with respectively with it flip flop equipment 120.a, 120.b.In addition, this vehicle 100 has for triggering the device 130 of flip flop equipment 120.a, 120.b.According to this embodiment, for identifying the equipment 140 of flip flop equipment 120.a, 120.b, be for triggering a part for the device 130 of flip flop equipment 120.a, 120.b.This personal protection means 110.a and the attached flip flop equipment 120.a for personal protection means 110.a interconnect.Flip flop equipment 120.a with for triggering the device 130 of flip flop equipment 120.a, be connected.Correspondingly, other personal protection means 110.b and the attached other flip flop equipment 120.b for other personal protection means 110.b with for triggering the device 130 of other flip flop equipment 120.b, be connected.
Flip flop equipment 120.a, the 120.b of identical and/or different type can be applied as to flip flop equipment 120.a, 120.b.For example, flip flop equipment 120.a can be for a kind of electrically corresponding to the type of ohm formula resistance, and other flip flop equipment 120.b can be for a kind of electrically corresponding to the type of inductance.In this case, for example flip flop equipment 120.a is to be safety air bag with firing unit and the personal protection means 110.a of pyrotechnics, and other flip flop equipment 120.b is that LEA magnet and other personal protection means 110.b are anti-overturning steel cylinders.
For controlling the device 130 of flip flop equipment 120.a, 120.b, have at least one interface, this interface is for exporting energizing signal 150.a flip flop equipment 120.a to and export other energizing signal 150.b to other flip flop equipment 120.b.Flip flop equipment 120.a and other flip flop equipment 120.b have respectively for receiving and/or read in the interface of energizing signal 150.a and other energizing signal 150.b.
For identifying the equipment 140 of flip flop equipment 120.a, 120.b, be constructed to provide energizing signal 150.a, 150.b via the interface on flip flop equipment 120.a, 120.b.According to firing circuit load, that is to say according to the difference of the type of flip flop equipment 120.a, 120.b there will be different spark current curves, that is to say the curve that there will be energizing signal 150.a, 150.b.The curve of energizing signal 150.a, 150.b is by by analyzing for identifying the equipment 140 of flip flop equipment 120.a, 120.b, so that identification is arranged in flip flop equipment 120.a, the 120.b of spark current circuit.
For identifying the embodiment of equipment 140 of flip flop equipment, utilized spark current to detect to portray the feature of the curve of energizing signal 150.a, 150.b.In being electrically depicted as the flip flop equipment 120.a of ohm formula resistance, the curve of energizing signal 150.a that represents to flow through the electric current of flip flop equipment 120.a has the curve that is similar to rectangle.For example, in this case, can be by the energizing signal 150.a controlling in the transistor circuit shown in Fig. 3 approx corresponding to square-wave signal.
When being electrically depicted as the flip flop equipment 120.b of inductance, after energizing signal 150.b is provided, can directly not forming electric current, thereby the Current rise of energizing signal 150.a is slower than when being electrically depicted as the flip flop equipment 120.a of ohm formula resistance.At this, the slope of the rising of energizing signal 150.b is determined by the size of the inductance of flip flop equipment 120.b.
For identifying the equipment 140 of flip flop equipment 120.a, 120.b, be constructed to after flip flop equipment 120.a, 120.b provide energizing signal 150.a, 150.b, detecting the moment that reaches or surpass recognition threshold.This equipment 140 is constructed to constantly determine the type of flip flop equipment 120.a, 120.b according to this.If this is positioned near the moment that energizing signal 150.a, 150.b are provided constantly, this flip flop equipment 120.a is the type of ohm formula resistance so.If this moment distance provides the moment of energizing signal 150.a, 150.b far away, the type that flip flop equipment 120.a is inductance so.At this, the energizing signal 150.a, the 150.b that in order to identify flip flop equipment 120.a, the 120.b of two types, use can be relative to each other.
If application is for identifying the equipment 140 of flip flop equipment 120.a, 120.b during diagnosis flip flop equipment 120.a, 120.b, Jiang compare lowland arranges the recognition threshold using in order to identify the type of flip flop equipment 120.a, 120.b so.In order to diagnose, this recognition threshold is 50mA in one embodiment.In when diagnosis, energizing signal 150.a, 150.b have lower maxim, for example, below 100mA, thereby stop reliably the triggering unintentionally of flip flop equipment 120.a, 120.b to be diagnosed.Correspondingly ，Jiang compare lowland is provided for the recognition threshold of diagnosis.
If applied for identifying the equipment 140 of flip flop equipment 120.a, 120.b, so this recognition threshold will be set higher when being applied to diagnose during the actual triggering of flip flop equipment 120.a, 120.b.In one embodiment, this recognition threshold is 2A.Correspondingly, compared to for diagnosis, energizing signal 150.a, 150.b have the maxim having improved, and this maxim makes the actual triggering of flip flop equipment 120.a, 120.b become possibility.
Fig. 2 shows according to the energizing signal 150 of one embodiment of the present of invention curve in time.In cartesian coordinate system, on axis of abscissa, be depicted as the time and on axis of ordinate, be depicted as the value of energizing signal 150.On ordinate, marked recognition threshold 210.Value constant, predefined recognition threshold 210 shows the dotted line that is parallel to the axis of abscissa in system of axes.Energizing signal 150 can be the energizing signal of describing by means of Fig. 1, can use when diagnosing the lower maxim of flip flop equipment and use this energizing signal when triggering practically the higher maxim of flip flop equipment using.This recognition threshold 210 can be the recognition threshold of describing by means of Fig. 1, its in response to for identify flip flop equipment type providing of energizing signal 150 and be used.
The curve of the energizing signal 150 of drawing in system of axes rises to the second value of the feature of the active state of portraying energizing signal 150 from portraying first value of feature of the sluggish state of energizing signal 150 at initial time t0.Wherein, energizing signal 150 is being identified moment t0a over recognition threshold 210 and subsequently until the second moment t1 is parallel to axis of abscissa on recognition threshold 210, at the second t1 constantly, this energizing signal 150 from the second value precipitous decline, through recognition threshold 210 and be adjusted to the first value.
In the embodiment shown in Fig. 2, energizing signal 150 surpasses recognition threshold 210 at moment t0a, within this moment t0a is positioned at very first time interval 220.Very first time interval 220 starts to extend and shows the identification tolerance region of t0a constantly from initial time t0, and in this tolerance region, this energizing signal 150 shows and is electrically described as an ohm flip flop equipment for formula resistance.On time, after very first time interval 220, show the second time gap 230.If identification constantly t0a is positioned at the second time gap 230 region, this energizing signal shows the typical curve of the flip flop equipment of inductance so.In the embodiment shown in Fig. 2, very first time interval 220 and the second time gap 230 arrange with interval.In other unshowned embodiment, very first time interval 220 and the second time gap 230 directly arrange mutually continuously.
On time, after the second interval 230, be provided with other moment t0b.If energizing signal 150 at other moment t0b not on recognition threshold 210, can draw so vicious flip flop equipment or vicious, for control flip flop equipment device or vicious, for identifying the device of flip flop equipment.If at other moment t0b, this energizing signal 150, under recognition threshold 210, can be exported breakdown signal by corresponding method.From the second moment t1, this energizing signal 150 enters the tolerance region on axis of abscissa again.
According to an embodiment, this energizing signal 150 is depicted as electric electric current, and this electric current is introduced into flip flop equipment.Until this electric current of t0 can equal zero constantly, can not have electric current to flow through.This electric current can continue to rise to or be the value that is enough to trigger practically flip flop equipment from moment t0, otherwise be suitable for carrying out flip flop equipment diagnosis and can not trigger the value of flip flop equipment.Thus, this electric current, from moment t0, or is depicted as trigger current, or is diagnosis electric current.
Fig. 3 shows the schematic diagram for a kind of possible connection modification of the flip flop equipment according to one embodiment of the present of invention.At the circuit shown in Fig. 3, have four points of connection or outside point of connection, it marks with ER, IGH, IGL and PGND respectively.At the first point of connection place, for example, can be connected with current source or voltage source.The 4th point of connection PGND place can for example be connected with the VREF (Voltage Reference) electromotive force such as ground potential.
The first point of connection ER is connected via transistor AND gate the second point of connection IGH being connected between the first point of connection ER and the second point of connection IGH.Wherein, this transistor is a part for high side power level 310, and this high side power level also comprises high side driver and spark current regulating control.By this high side driver, can connect transistor, and allow thus or the electric current of interruption between the first point of connection ER and the second point of connection IGH.
The 3rd point of connection IGL connects via other transistor AND gate the 4th point of connection PGND connecting between the 3rd point of connection IGL and the 4th point of connection PGND.Wherein, this other transistor is a part for downside power level 320, and this downside power level also comprises low side driver.By this low side driver, can connect this other transistor, and allow thus or interrupt the electric current between the 3rd point of connection IGL and the 4th point of connection PGND.
Dissimilar 120.a, the 120.b of flip flop equipment 120 can be applied as to flip flop equipment 120.According at the embodiment shown in Fig. 3, between the second point of connection IGH and the 3rd point of connection IGL, be provided with a flip flop equipment 120 that electrically represents the type of ohm formula resistance 120.a.Electrically being depicted as an ohm flip flop equipment 120 of formula resistance 120.a is shown in Figure 3 for and has an ohm formula firing unit R
squibcircuit.Alternatively, another can be set between the second point of connection IGH and the 3rd point of connection IGL electrically corresponding to the flip flop equipment 120 of the type of inductance 120.b.In Fig. 3, the flip flop equipment 120 that is electrically depicted as inductance 120.b is depicted as the circuit with LEA magnet.
Thus, the second point of connection IGH and the 3rd point of connection IGL illustrate the connection contact point for flip flop equipment 120.Thus, flip flop equipment 120 can be connected between the second point of connection IGH and the 3rd point of connection IGL.If the transistor of shown circuit is connected with other transistor turns ground, the electric current that represents so in this embodiment energizing signal flow to the 4th point of connection PGND from the first point of connection ER via the other transistor of transistor, the second point of connection IGH, flip flop equipment 120, the 3rd point of connection IGL and the downside power level 320 of high side power level 310.Wherein, this electric current is on the one hand for determining Class1 20.a, the 120.b of flip flop equipment 120, and on the other hand for carrying out the diagnosis of flip flop equipment 120 or for triggering flip flop equipment 120.
This circuit also has for obtaining the device of the curve of energizing signal, in this case flows through the electric current of flip flop equipment 120.For example, should be implemented as current measuring device or voltage measuring apparatus for obtaining the device of the curve of energizing signal, it can be arranged on the suitable position arbitrarily of shown electric current.For example, should be the device that detects for spark current, for obtaining the device of the curve of energizing signal, be integrated among high side power level 310.
Fig. 4 a show according to one embodiment of the present of invention, be two separate energizing signal of intensity of current curve in time.Energizing signal 150.a and with it independently the second energizing signal 150.b be similar among the embodiment shown in Fig. 2 is recorded in cartesian coordinate system.
When type of service is the flip flop equipment of ohm formula resistance, the first energizing signal 150.a can be corresponding to the electric current flowing through at the circuit shown in Fig. 3.When flip flop equipment that type of service is inductance, the second energizing signal 150.b can be corresponding to the electric current flowing through at the circuit shown in Fig. 3.
Wherein, constantly t0 is corresponding to such moment, this time be engraved in two transistors shown in Fig. 3 by least one transistor not the state of conducting set out to both conductings connect.
Wherein, constantly t1 is corresponding to such moment, this time be engraved in two transistors shown in Fig. 3 and set out at least one transistor and be truncated by the state of both equal conductings.
Energizing signal 150.a has the form of the near ideal of square-wave signal.At moment t0, this energizing signal 150.a vertically continue to rise, and surpasses recognition threshold 210 until on even keel is located at a value on recognition threshold, be parallel to axis of abscissa ground until second constantly t1 and second constantly t1 vertically decline until zero line.Identification constantly t0a for energizing signal 150.a corresponding to initial time t0.
The second energizing signal 150.b is with the rising from moment t0 of constant slope, surpass identification after moment t0 constantly t0a place recognition threshold and reach the value on recognition threshold, energizing signal 150.a for example.By means of overshoot
the second energizing signal 150.b is adjusted to the value identical with energizing signal 150.a.At the second t1 constantly, this energizing signal 150.b vertically or and precipitous decline until zero line.
Two kinds of possible connection modification of the schematically illustrated safety air bag circuit of Fig. 3.According to the difference of firing circuit load, different spark current curves will be there is.Shown in Figure 3 two alternative, there is ohm circuit of formula firing unit (R_Squib) and there are both of circuit of LEA magnet.The present invention utilizes spark current to detect to portray the feature of spark current curve.The ground that has no truck with, point of ignition will change and definite ignition mode thus.
Fig. 4 b show according to one embodiment of the present of invention, two separate energizing signal are the graphic curve in time of two scale notation.In cartesian coordinate system, on axis of abscissa, be on time and axis of ordinate, to be the on off state of energizing signal.Time shaft is corresponding to the time shaft in Fig. 4 a.As long as energizing signal is in Fig. 4 a under recognition threshold 210, energizing signal is recorded on zero line so, and when moving on recognition threshold 210 in Fig. 4 a, this energizing signal records in superincumbent value so.For two energizing signal 150.a, 150.b, obtain desirable square-wave signal.Energizing signal 150 is the value above value below rises to and at the second t1 back to zero bit line that again declines constantly at initial time t0.The second energizing signal 150.b is in the identification value of t0a above rising to and at the second t1 decline back to zero bit line constantly constantly.For energizing signal 150.a, initial time t0 is corresponding to identification moment t0a.
According to an embodiment, initial time t0 is the beginning of the current impulse of energizing signal.At identification moment t0a, will surpass the current threshold detecting for spark current.Moment t0b has in addition described authenticity examination constantly.The moment at other moment t1 will arrive the termination of the current impulse of this energizing signal.
When being connected with firing unit, can forming at once this electric current, thereby make this energizing signal there is the curve of rectangle as shown in its curve by means of energizing signal 150.a.Spark current detects identification electric current from initial time t0.When being connected with LEA magnetic actuator, because the inductance characteristic of LEA magnetic actuator can directly not form electric current by as shown in its curve by means of energizing signal 150.b.Spark current detects just identifies electric current from initial time t0a.Initial time t0a is relevant with the inductance size (typically being 2mH) of LEA module.Yet, if this electric current is not also identified at other moment t0b, can be evaluated as false result so.
Fig. 5 show for identify for the personal protection means of vehicle, according to the method 500 of the flip flop equipment of one embodiment of the present of invention.Should have for identifying the method 500 of flip flop equipment the curve that energizing signal is provided step 510, analyze the step 520 of curve of energizing signal and the step 530 of the type of output flip flop equipment for flip flop equipment.In the step 510 of curve that energizing signal is provided, will read in the curve of energizing signal, and in following step 520, analyze the curve of energizing signal.In the step 520 of curve of analyzing energizing signal, the type of flip flop equipment will be determined.The type of flip flop equipment is electrically ohm formula resistance or inductance.In order to determine the type of flip flop equipment, the identification moment that arrives or surpass recognition threshold by this energizing signal will be analyzed in the step 520 analyzing.According to identification, constantly whether be positioned at very first time interval or the second time gap, type is defined as to ohm formula resistance or an inductance.In a special embodiment, when the moment other, this energizing signal was under recognition threshold, will provide breakdown signal, wherein, after this other moment is positioned at and identifies constantly.
In the method 500 shown in Fig. 5, a kind of method being connected for the air bag igniting circuit of automatically identifying for diagnosing and lighting a fire has been proposed.The method can either also can be used when igniting when diagnosis.In application when igniting, whether exist LEA connect and correspondingly with LEA pattern, light a fire " automatically " identification.In the application of diagnosis, will have nothing to do and select common diagnosis or LEA diagnosis in connecting.LEA diagnosis has following shortcoming, and test current must flow through with the longer time, to obtain stable signal.This means higher average loss power and higher chip temperature thus, and in control setup each unit time also by the higher electric current demand of needs.Yet by this identification, the circuit of every other use firing unit is no longer born the burden of longer test current time.In the enforcement modification that can connect at spark current, observe the characteristic of automatic load identification.
In the method 500 shown in Fig. 5, have the following advantages, i.e. igniting can be connected with firing circuit current time shorter when (igniting operation) is irrelevant, automatically the loading condition of identification ignition circuit (diagnosis operation), igniting resistance are measured by bringing less wasted power and bringing thus lower chip temperature, obtains thus wasted power builder's less silicon area.In addition will there is the reduction of electric current demand in the diagnosis run duration at LEA circuit.
Fig. 6 show for diagnose for the personal protection means of vehicle, according to the method 600 of the flip flop equipment of one embodiment of the present of invention.Should be for diagnosing the method 600 of flip flop equipment to have to implement for identifying flip flop equipment so that the step 610 of step, the step 620 of the diagnostic method of the type adjustment of selective basis flip flop equipment of the method for the type of identification flip flop equipment and carry out the step 630 that this diagnostic method is diagnosed this flip flop equipment.
Fig. 7 show for trigger for personal protection means, according to the method 700 of the flip flop equipment of the vehicle of one embodiment of the present of invention.Should have in the first step 710 that is constantly provided for the energizing signal of flip flop equipment, implement for identifying flip flop equipment so that the step 720 of the step of the method for the type of identification flip flop equipment and according to second of the type adjustment of flip flop equipment the step 730 that is finishing this energizing signal constantly for triggering the method 700 of diagnostic device.
Described and in the accompanying drawings shown embodiment only exemplarily select.Can completely or with reference to single feature mutually combine and obtain different embodiment.An embodiment also can supplement by the feature of other embodiment.In addition, according to method step of the present invention, can repeat and implement to be different from described order.If embodiment comprises with "and/or" associating First Characteristic and Second Characteristic, be construed as so embodiment according to this form of implementation and both there is First Characteristic and also there is Second Characteristic, and only there is First Characteristic or only there is Second Characteristic according to other form of implementation.
Claims (10)
- One kind for identification flip flop equipment (120.a, the 120.b for the personal protection means (110.a, 110.b) of vehicle (100); 120) method (500), wherein, described method (500) has following steps:Analyze (520) for described flip flop equipment (120.a, 120.b; 120) energizing signal (150.a, 150.b; 150) curve, to determine described flip flop equipment (120.a, 120.b; 120) type.
- 2. method according to claim 1 (500), wherein, described flip flop equipment (120.a, 120.b; 120) described type is electrically described as ohm formula resistance or is inductance.
- 3. according to method in any one of the preceding claims wherein (500), wherein, in the step (520) of described analysis, will analyze by described energizing signal (150.a, 150.b; 150) reach or surpass the identification moment (t0a) of recognition threshold (210), and in the situation that using the described identification moment (t0a), determine described flip flop equipment (120.a, 120.b; 120) described type.
- 4. method according to claim 3 (500), wherein, when the described identification moment (t0a) is within very first time interval (220), the described type of described flip flop equipment (120) is confirmed as an ohm formula resistance, and when the described identification moment (t0a) is within the second time gap (230), described flip flop equipment (120.a, 120.b; 120) described type is confirmed as inductance, and wherein, described the second time gap (230) is arranged on described very first time interval (220) afterwards in time.
- 5. method according to claim 4 (500), wherein, as the moment other (t0b) described energizing signal (150.a, 150.b; 150) in the time of under described recognition threshold (210), provide breakdown signal, wherein, the described other moment (t0b) is positioned at the described identification moment (t0a) afterwards.
- One kind for diagnosis for flip flop equipment (120.a, the 120.b of personal protection means (110.a, 110.b); 120) method (600), wherein, described method (600) has following steps:Implement (610) according to the step of the method described in any one in claim 1 to 5 (500), to identify described flip flop equipment (120.a, 120.b; 120) type;Select (620) according to described flip flop equipment (120.a, 120.b; 120) diagnostic method that described type is adjusted; AndCarry out (630) described diagnostic method, to diagnose described flip flop equipment (120.a, 120.b; 120).
- 7. one kind for triggering the method (700) for the flip flop equipment (120) of personal protection means (110.a, 110.b), and wherein, described method (700) has following steps:In first moment (t0), provide (710) for described flip flop equipment (120.a, 120.b; 120) energizing signal (150.a, 150.b; 150);Implement (720) according to the step of method in any one of the preceding claims wherein (500), to identify described flip flop equipment (120.a, 120.b; 120) type; AndAccording to described flip flop equipment (120.a, 120.b; 120) second moment (t1) that described type is adjusted finishes (730) described energizing signal (150).
- One kind for identification for flip flop equipment (120.a, the 120.b of personal protection means (110.a, 110.b); 120) equipment (140), wherein, described equipment is constructed to carry out the step according to the method described in any one in claim 1 to 7 (500,600,700) in the device of correspondingly constructing.
- 9. one kind for controlling flip flop equipment (120.a, the 120.b for personal protection means (110.a, 110.b); 120) device (130), wherein, described device (130) has with lower device:Be used for providing energizing signal (150.a, 150.b; 150) device;Be used for described energizing signal (150.a, 150.b; 150) offer described flip flop equipment (120.a, 120.b; 120) device; AndFor identifying flip flop equipment (120.a, 120.b according to claim 8; 120) equipment (140).
- 10. a computer program with program code, when described computer program is implemented on device, described computer program is for carrying out according to the method described in claim 1 to 7 any one (500,600,700).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012210874.2 | 2012-06-26 | ||
| DE201210210874 DE102012210874A1 (en) | 2012-06-26 | 2012-06-26 | Method for detecting, for diagnosing and triggering a triggering device for a passenger protection device for a vehicle and device for detecting and triggering a triggering device for a personal protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103507735A true CN103507735A (en) | 2014-01-15 |
Family
ID=49487176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310262947.5A Pending CN103507735A (en) | 2012-06-26 | 2013-06-24 | A method and apparatus for detecting, diagnosing, and triggering a trigger means of a personal protection means |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP2014004996A (en) |
| CN (1) | CN103507735A (en) |
| DE (1) | DE102012210874A1 (en) |
| FR (1) | FR2992267A1 (en) |
| IT (1) | ITMI20130986A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105939898A (en) * | 2014-02-06 | 2016-09-14 | 大陆汽车有限公司 | Method for triggering a plurality of actuators of a safety system of a motor vehicle |
| CN107406046A (en) * | 2015-03-13 | 2017-11-28 | 罗伯特·博世有限公司 | For the method and apparatus for the actuator for safeguarding safety air sac controller |
| CN109910807A (en) * | 2019-02-21 | 2019-06-21 | 东软睿驰汽车技术（沈阳）有限公司 | A kind of collision detection circuit |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011087077A1 (en) | 2011-11-25 | 2013-05-29 | Robert Bosch Gmbh | Method and arrangement for controlling at least one triggering element for a personal protection device |
| DE102014207302A1 (en) * | 2014-04-16 | 2015-10-22 | Robert Bosch Gmbh | Method and device for switching off at least one ignition output stage for a squib of a pyrotechnic protective agent for a vehicle |
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| EP0342401A2 (en) * | 1988-05-16 | 1989-11-23 | TEMIC TELEFUNKEN microelectronic GmbH | Device for triggering a passive safety system |
| US5229943A (en) * | 1989-03-20 | 1993-07-20 | Siemens Aktiengesellschaft | Control unit for a passenger restraint system and/or passenger protection system for vehicles |
| WO2005012047A1 (en) * | 2003-07-25 | 2005-02-10 | Robert Bosch Gmbh | Passenger protection device for a vehicle, and method for triggering a passenger protection device for a vehicle for prematurely identifying a critical driving situation |
| CN1648809A (en) * | 2004-01-29 | 2005-08-03 | 株式会社电装 | Vehicular occupant protection system |
| CN1812902A (en) * | 2003-06-27 | 2006-08-02 | 罗伯特·博世有限公司 | Verfahren und vorrichtung zur ansteuerung einer insassenschutzeinrichtung in einem fahrzeug |
-
2012
- 2012-06-26 DE DE201210210874 patent/DE102012210874A1/en not_active Ceased
-
2013
- 2013-06-14 IT ITMI20130986 patent/ITMI20130986A1/en unknown
- 2013-06-24 CN CN201310262947.5A patent/CN103507735A/en active Pending
- 2013-06-25 JP JP2013132163A patent/JP2014004996A/en active Pending
- 2013-06-26 FR FR1356121A patent/FR2992267A1/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0342401A2 (en) * | 1988-05-16 | 1989-11-23 | TEMIC TELEFUNKEN microelectronic GmbH | Device for triggering a passive safety system |
| US5229943A (en) * | 1989-03-20 | 1993-07-20 | Siemens Aktiengesellschaft | Control unit for a passenger restraint system and/or passenger protection system for vehicles |
| CN1812902A (en) * | 2003-06-27 | 2006-08-02 | 罗伯特·博世有限公司 | Verfahren und vorrichtung zur ansteuerung einer insassenschutzeinrichtung in einem fahrzeug |
| WO2005012047A1 (en) * | 2003-07-25 | 2005-02-10 | Robert Bosch Gmbh | Passenger protection device for a vehicle, and method for triggering a passenger protection device for a vehicle for prematurely identifying a critical driving situation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105939898A (en) * | 2014-02-06 | 2016-09-14 | 大陆汽车有限公司 | Method for triggering a plurality of actuators of a safety system of a motor vehicle |
| CN105939898B (en) * | 2014-02-06 | 2018-04-06 | 大陆汽车有限公司 | The method for triggering the multiple exciters of an automobile safety system |
| CN107406046A (en) * | 2015-03-13 | 2017-11-28 | 罗伯特·博世有限公司 | For the method and apparatus for the actuator for safeguarding safety air sac controller |
| CN109910807A (en) * | 2019-02-21 | 2019-06-21 | 东软睿驰汽车技术（沈阳）有限公司 | A kind of collision detection circuit |
| CN109910807B (en) * | 2019-02-21 | 2021-02-23 | 东软睿驰汽车技术（沈阳）有限公司 | Collision detection circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| ITMI20130986A1 (en) | 2013-12-27 |
| FR2992267A1 (en) | 2013-12-27 |
| DE102012210874A1 (en) | 2014-01-23 |
| JP2014004996A (en) | 2014-01-16 |
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