CN103707834A - Automobile airbag electric control device and control method thereof - Google Patents

Automobile airbag electric control device and control method thereof Download PDF

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Publication number
CN103707834A
CN103707834A CN201310748992.1A CN201310748992A CN103707834A CN 103707834 A CN103707834 A CN 103707834A CN 201310748992 A CN201310748992 A CN 201310748992A CN 103707834 A CN103707834 A CN 103707834A
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China
Prior art keywords
air bag
automobile air
safe automobile
microprocessor
information
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Pending
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CN201310748992.1A
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Chinese (zh)
Inventor
徐进
朱汉敏
陈堂敏
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Suzhou Institute of Trade and Commerce
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Suzhou Institute of Trade and Commerce
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Priority to CN201310748992.1A priority Critical patent/CN103707834A/en
Publication of CN103707834A publication Critical patent/CN103707834A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an automobile airbag electric control device. The device comprises a micro processor, a left side impact sensor, a right side impact sensor, an ignition trigger circuit, a standby power source, an alarm circuit and a data collecting circuit, wherein the left side impact sensor, the right side impact sensor, the ignition trigger circuit, the standby power source, the warning circuit and the data collecting circuit are respectively connected with the micro processor. The left side impact sensor and the right side impact sensor are used for detecting impact on the left side and the right side of an automobile respectively and sending collected left side sensing information and right side sensing information to the micro processor; the signal collecting circuit is used for collecting acceleration information of the automobile and sending the acceleration information to the micro processor; the micro processor judges whether an airbag needs to be detonated or not to control the alarm circuit to give an alarm; the ignition trigger circuit is used for monitoring whether a main power source of the automobile airbag supplies power or not, the standby power source is switched through the micro processor, and the automobile airbag is triggered through the ignition trigger circuit. Therefore, the airbag is controlled to be detonated through the electric control device, and injuries to passengers are effectively reduced.

Description

A kind of safe automobile air bag electrical controller and control method thereof
Technical field
The present invention relates to field of intelligent control, relate in particular to a kind of safe automobile air bag electrical controller and control method thereof.
 
Background technology
Air bag system is called SRS; with respect to safety strap; safety air bag is an auxiliary protection equipment; safety air bag is to use with rubber lined unique fabric nylon to make, and during work, with harmless helium, fills, and this system is started by a sensor; this sensor is for monitoring the degree that collision car speed subtracts the safety air bag size of swift; what in collision, occur is early stage, and safety air bag starts inflation, and safety inflated approximately needs 0.03 second.Safety air bag very fast aeration is very important, can guarantee like this when passenger's health is when by safety strap constraint, motionless and head is still advanced forward, safety air bag can be in time, thereby while making head encounter safety air bag, safety air bag starts exhaust by the pore of balloon surface.The discharge of gas has certain plastics, guarantees to allow people's body part slow down lentamente; The protection philosophy of Generally Recognized as safe air bag is: when automobile suffers necessarily to collide after strength; gas-bag system will cause the chemical reaction of certain similar low dose of explosive charge; the safety air bag being hidden in car is just inflated and is ejected in moment; before occupant's health and in-vehicle device collision, play place mat effect; alleviate the suffered impulsive force of health, thereby reach the effect that alleviates occupant injury.
Arranging of existing safe automobile air bag, generally when automobile bumps, no matter whether automobile have passenger to take as the safety air bag in the place ahead, all can be by the airbag-releasing of this part inflation rapidly, aspect the sensing control of its safe automobile air bag and prematurity, thereby cause some unnecessary economic losses; And when auto against, air bag directly ejects, do not give passenger certain security alarm prompting,, make passenger can not make rapid health and change, can not give the certain protection of health.
Therefore, be necessary to propose a kind of safe automobile air bag electrical controller, by the ejection of effective this safe automobile air bag of control, effectively improve the protection effect of safe automobile air bag.
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Summary of the invention
In order to overcome the defect of prior art, the present invention aims to provide and a kind ofly can when automobile reaches impact strength, ignite safe automobile air bag in time, before igniting safe automobile air bag, give alarm simultaneously, and the safe automobile air bag electrical controller of not igniting at the safe automobile air bag not having on passenger's seat.
To achieve these goals, the invention provides a kind of safe automobile air bag electrical controller, be connected with a safe automobile air bag, described safe automobile air bag electrical controller comprises a microprocessor, left side impact microphone, right side impact microphone, igniting trigger circuit, backup power, warning circuit and data acquisition circuit; Wherein said microprocessor connects respectively described left side impact microphone, described right side impact microphone, described igniting trigger circuit, described backup power, described warning circuit and described data acquisition unit; Wherein, described left side impact microphone and described right side impact microphone are respectively used to detect the collision on automobile left side and right side, and left side sensory information and the right side sensory information of described left side impact microphone and the impact microphone collection of described right side are sent to described microprocessor, by described microprocessor, control described warning circuit and report to the police; Described signal acquisition circuit is used for gathering the acceleration information of automobile, and sends to described microprocessor; Whether described igniting trigger circuit power for monitoring the main power source of described safe automobile air bag, by described microprocessor, switch described backup power, and by safe automobile air bag described in described igniting trigger circuit triggers.Thereby by this safe automobile air bag electrical controller, effectively control the ignition of this safe automobile air bag, and report to the police by this warning circuit, passenger can be taken precautions against in time.
Preferably, described igniting trigger circuit are also provided with seat induction installation, and described seat induction installation is used for responding on car seat, whether have passenger, and trigger described safe automobile air bag while having passenger by described igniting trigger circuit on seat; Thereby while avoiding auto against, all air bags are all ignited and are opened, and cause unnecessary loss.
Preferably, described microprocessor comprises an AT89C52 micro controller system, by described AT89C52 micro controller system, receives described acceleration information, described left side sensory information and described right side sensory information, and controls described warning circuit and report to the police.
Preferably, described left side crash sensor and described right side crash sensor are electromechanical sensor, deceleration/decel or the inertia on left side and right side while detecting auto against by this electromechanical sensor, and left side sensory information and right side sensory information are sent to micro-processing, as the trigger message of described safety air bag.
Preferably, described backup power comprises some conies, when described backup power cannot be worked for the main power source of safe automobile air bag, by described microprocessor, switch described backup power, and the ignition power supply of described safe automobile air bag is provided by described backup power.
Preferably, described warning circuit comprises a protection crash sensor, and described protection crash sensor is a mercury switch, by described mercury switch, connects described microprocessor and described warning circuit.
The invention allows for a kind of safe automobile air bag electric-control method, utilize above-mentioned safe automobile air bag electrical controller to realize the Ignition Control of safe automobile air bag, comprise the steps:
(1) whether the main power source that detects described safe automobile air bag by described igniting trigger circuit powers, if this main power source is not powered, by described microprocessor, switches and start backup power;
(2) by described left side crash sensor and described right side crash sensor monitoring automobile left side and right side, whether bump, and left side sensor information and right side sensory information are sent to described microprocessor, by described microprocessor judges impact strength;
(3) by described data acquisition circuit, gather the acceleration/accel of automobile, and degree of will speed up information sends to described microprocessor;
(4) by described microprocessor, receive described left side sensor information, described right sensor information and described acceleration information, if described left side sensor information, described right sensor information and described acceleration information are all over threshold range, by described microprocessor, control described warning circuit and report to the police, and control described ignition trigger device and ignite described safe automobile air bag.
Preferably, described step (4) also comprises: on the induction installation induction car seat, seat by described igniting trigger circuit, whether have passenger, while there is no passenger on seat, even if automobile bumps also without igniting safe automobile air bag, and ignite safe automobile air bag having on passenger's seat.
Preferably, described threshold value comprises left side collision threshold, right side collision threshold and acceleration rate threshold; Described left side collision threshold and described right side collision threshold are the deceleration/decel threshold value after auto against, and described deceleration/decel threshold value is 9-14km/h, and described acceleration rate threshold is frontal crash of vehicles acceleration rate threshold, is 15-30km/h; If the collision information and the acceleration information that detect are greater than this threshold range, microprocessor is controlled this igniting trigger circuit ignition safe automobile air bag.
Compared with prior art, beneficial effect of the present invention is as follows:
1, safe automobile air bag electrical controller of the present invention gathers the collision information of automobile by crash sensor, by data acquisition information, gather the acceleration information of automobile, and collision information and acceleration information are sent to microprocessor, by microprocessor judges automobile, whether reach impact strength, if reach impact strength, by this microprocessor, control warning circuit and report to the police, and control these igniting trigger circuit and ignite safe automobile air bag; Thereby at firing safety air-bag, be to pass through the timely reminding passengers of warning circuit, make to reduce the injury that passenger is subject to as far as possible.
2, on the igniting trigger circuit of safe automobile air bag electrical controller of the present invention, be provided with seat induction installation, for responding to whether there is passenger on the seat that safety air bag is installed, thereby when having passenger on seat, just ignite the trigger circuit that make to light a fire safe automobile air bag, avoid not having the safety air bag on passenger's seat to ignite, reduce unnecessary economic loss.
 
Accompanying drawing explanation
Fig. 1 is the integral structure block diagram of safe automobile air bag electrical controller of the present invention;
Fig. 2 is the modular construction schematic diagram of the backup power of safe automobile air bag electrical controller of the present invention;
Fig. 3 is the modular construction schematic diagram of the warning circuit of safe automobile air bag electrical controller of the present invention;
Fig. 4 is the modular construction schematic diagram of the igniting trigger circuit of safe automobile air bag electrical controller of the present invention;
Fig. 5 is the modular construction schematic diagram of the data acquisition circuit of safe automobile air bag electrical controller of the present invention;
Fig. 6 is safe automobile air bag electric-control method diagram of circuit of the present invention.
Symbol list:
10-microprocessor, 11-left side impact microphone, 12-right side impact microphone, 13-backup power, 14-warning circuit, the 15-trigger circuit of lighting a fire, 16-data acquisition circuit.
 
the specific embodiment:
Referring to the accompanying drawing that the embodiment of the present invention is shown, below will describe in more detail the present invention.Yet the present invention can be with realizations such as multi-form, specifications, and should not be construed as the restriction of the embodiment being subject in this proposition.On the contrary, it is abundant and complete open in order to reach proposing these embodiment, and makes more relevant those skilled in the art person understand scope of the present invention completely.In these accompanying drawings, for clearly visible, may zoom in or out relative size.
Please refer to Fig. 1 to Fig. 4, as shown in Figure 1, a kind of safe automobile air bag electrical controller provided by the invention, this safe automobile air bag electrical controller is connected with a safe automobile air bag, and this safe automobile air bag electrical controller comprises a microprocessor 10, left side impact microphone 11, right side impact microphone 12, igniting trigger circuit 15, backup power 13, warning circuit 14 and data acquisition circuit 16; Wherein, this microprocessor 10 connects respectively this left side impact microphone 11, right side impact microphone 12, igniting trigger circuit 15, backup power 13, warning circuit 14 and data acquisition circuit 16; While being clashed in automobile traveling process, by this left side impact microphone 11 and right side impact microphone 12, detect respectively the sensor information on this automobile automobile left side and right side when clashing into, and the left side sensory information of collection and right side sensory information are sent to microprocessor 10; By this data acquisition circuit 16, gather the acceleration information of automobile, and this acceleration information is sent to microprocessor 10; By this microprocessor 10, receive this left side sensory information, right side sensory information and acceleration information, and judge whether this automobile needs to open safe automobile air bag, if need to open this safety air bag, this microprocessor 10 is controlled this warning circuit 14 warnings, simultaneously, whether the main power source that these igniting trigger circuit 15 detect this safe automobile air bag powers, when if the main power source of this safe automobile air bag is not powered, this microprocessor 10 is controlled this safe automobile air bag and is switched to backup power 13 power supplies, and ignites safe automobile air bag by these igniting trigger circuit 15.Thereby the effectively ignition fast that effectively improves safe automobile air bag in automobile collision procedure, reduces passenger's body damage, and reports to the police by this warning circuit 14, and passenger can be taken precautions against in time.
Wherein, in specific implementation process, this microprocessor 10 is an AT89C52 micro controller system, this AT89C52 micro controller system is a low-power consumption, high-performance CMOS 8-bit microcontroller, and in this micro controller system, be provided with can be repeatedly erasable Flash read-only program memory, this AT89C52 micro controller system is used for receiving this acceleration information, left side sensory information, right side sensory information, and judge this acceleration information, whether left side sensory information or right side sensory information surpass the collision threshold of setting, this collision threshold comprises respectively acceleration rate threshold, left side sensory information threshold value and right side sensory information threshold value, thereby make AT89C52 micro controller system judge this acceleration information, whether left side sensory information or right side sensory information surpass this threshold value, and reported to the police by this AT89C52 Single-chip Controlling warning circuit 14, and control these igniting trigger circuit 15 and ignite safe automobile air bag.This left side crash sensor 11 and right side crash sensor 12 are an electromechanical sensor, for detection of deceleration/decel or the inertia of when collision automobile, and sensory information (comprising deceleration/decel or inertia) is sent to microprocessor 10 process.
And, ignite safe automobile air bag when preventing that nobody from taking a seat and cause economic loss, these igniting trigger circuit 15 are also provided with seat induction installation, this seat induction installation is used for responding on car seat, whether have passenger, if there is passenger on seat, and need to ignite safe automobile air bag time, these igniting trigger circuit 15 are ignited safe automobile air bag at once, thereby effectively protect passenger; If there is no passenger on seat, at automobile, bump, and need to ignite safe automobile air bag time, owing to there is no passenger on this seat, these igniting trigger circuit 15 do not need to ignite safe automobile air bag, thereby effectively avoid unnecessary economic loss.As shown in Figure 4, the seat induction installation K4 of these igniting trigger circuit 15 is used for responding on seat whether have people, and when this seat, induction installation K4 closure causes K switch to attract and transmits signal to micro controller system, thereby trigger, ignites safe automobile air bag.This backup power 13 comprises some conies, it is for when the auto against, in situation about can not power to air bag system if the main power source of safe automobile air bag damages, this microprocessor 10 is switched to backup power 13, by this backup power 13 needed electric power of air bag system work of promptly giving security.In implementation process, although the power-on time of backup power 13 generally can only continue 6S left and right, but in this power-on time, the microprocessor 10 that but can guarantee safe automobile air bag records impact strength, and ignite safe automobile air bag by igniting trigger circuit 15, thereby effectively protect passenger's safety; As shown in Figure 2, this backup power 13 comprises the break-make that drives aerotron 3DD15 as 555 timers of hysteresis comparator, as automatic switchover electronic switch, relatively carrys out feedback information, and control backup power 13 by voltage and the reference voltage recording; When power supply is during 12V, voltage makes 555 timers in reset mode after resistance step-down and diode rectification, wherein, pin 3 output LOW voltages, indicator lamp does not work, aerotron 3DD15 cut-off, thus make to load RL power-off or by other Power supply; After 12V power-off, 555 timers are in SM set mode output HIGH voltage, and indicator lamp is bright and make aerotron 3DD15 conducting, and load RL work, and switch is attracted, and starts backup power 13.
In implementation process, as shown in Figure 3, this warning circuit 14 comprises four tones of standard Chinese pronunciation alarm music integrated circuit and buzzer phone, and this warning circuit 14 is provided with mercury switch, this microprocessor 10 receives after each sensory information, and when judging auto against and need to ignite safe automobile air bag, this microprocessor 10 need to be controlled this warning circuit 14 and report to the police, thereby give passenger prompting, reduce passenger's damage as far as possible.And this data acquisition circuit 16 is acceleration information Acquisition Circuit, comprise a data trap chip, as shown in Figure 5, the power supply voltage VDD of this chip is 5V, 17 pins of this chip are 2.5V Voltage Reference pin, can independent external 2.5V voltage, also can select the mode of dividing potential drop, and realize dividing potential drop by R1=R2=K Ω is set; And if this VDD is while being 2.5V, and this chip connects the shunt capacitance C1 of one 0.01 μ F, thereby makes the ratio corresponding speed value of the AON of this data acquisition chip and the voltage output value of AOP pin.
In specific implementation process, by connection and the setting of above-mentioned each device, form the electrical controller of this safe automobile air bag, by this safe automobile air bag electrical controller, realize the Ignition Control of safe automobile air bag, comprise the steps:
(1) by the main power source of igniting trigger circuit detection safe automobile air bag, whether power, if this main power source is not powered, by this microprocessor, switch and start backup power;
(2) by left side crash sensor and right side crash sensor monitoring automobile left side and right side, whether bump, and left side sensor information and right side sensory information are sent to microprocessor, by this microprocessor judges impact strength;
(3) by data acquisition circuit, gather the acceleration/accel of automobile, and degree of will speed up information sends to microprocessor;
(4) by this microprocessor, receive left side sensor information, right sensor information and acceleration information, if this left side sensor information, right sensor information and acceleration information are all over threshold range, by this microprocessor, control warning circuit and report to the police, and control this ignition trigger device and ignite safe automobile air bag; Wherein, on the seat induction installation induction car seat by these igniting trigger circuit, whether there is passenger, while there is no passenger on seat, even if automobile bumps also without igniting safe automobile air bag, and ignite safe automobile air bag having on passenger's seat.
And in specific implementation process, this threshold value comprises left side collision threshold, right side collision threshold and acceleration rate threshold; This left side collision threshold and right side collision threshold are the deceleration/decel threshold value after auto against, and this deceleration/decel threshold value is 9-14km/h, and acceleration rate threshold is frontal crash of vehicles acceleration rate threshold, is 15-30km/h.Thereby can make this microprocessor effectively process and judge the impact strength of this automobile; when the collision information detecting when crash sensor and data acquisition circuit and acceleration information are greater than this threshold range; this microprocessor will be controlled these igniting trigger circuit and ignite safe automobile air bag, thus protection passenger safety.
The safe automobile air bag electrical controller of the present embodiment is not limited in the content that the present embodiment proposes; in specific implementation process; this left side crash sensor and right side crash sensor are not limited to the electromechanical sensor that the present embodiment provides; also can be conducive to detect the mechanical sensor collection automobile left side of auto against intensity or the collision information on right side by other; thereby by microprocessor, accurately judge and ignite safe automobile air bag, and effectively protecting passenger safety.
In addition, we it should further be appreciated that, the safe automobile air bag electric-control method that the present invention proposes or not to be limited with this, and the acceleration information that the data acquisition circuit in this control method and crash sensor gather and collision sensing information is precedence relationship not, and it can carry out simultaneously; And while whether having passenger on judging seat in this safety air bag ignition process, can detecting respectively after auto against or before collision while whether having passenger on seat, thereby firing safety air-bag; Therefore, the not certain sequencing of the step of this control method.
Obviously, those skilled in the art can carry out various changes and distortion and not depart from the spirit and scope of the present invention the present invention.Like this, if these modifications of the present invention and distortion belong in the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes interior.

Claims (9)

1. a safe automobile air bag electrical controller, be connected with a safe automobile air bag, it is characterized in that, described safe automobile air bag electrical controller comprises a microprocessor, left side impact microphone, right side impact microphone, igniting trigger circuit, backup power, warning circuit and data acquisition circuit; Wherein said microprocessor connects respectively described left side impact microphone, described right side impact microphone, described igniting trigger circuit, described backup power, described warning circuit and described data acquisition unit;
Described left side impact microphone and described right side impact microphone are respectively used to detect the collision on automobile left side and right side, and left side sensory information and the right side sensory information of described left side impact microphone and the impact microphone collection of described right side are sent to described microprocessor, by described microprocessor, control described warning circuit and report to the police; Described signal acquisition circuit is used for gathering the acceleration information of automobile, and sends to described microprocessor; Whether described igniting trigger circuit power for monitoring the main power source of described safe automobile air bag, by described microprocessor, switch described backup power, and by safe automobile air bag described in described igniting trigger circuit triggers.
2. safe automobile air bag electrical controller according to claim 1, it is characterized in that, described igniting trigger circuit are also provided with seat induction installation, described seat induction installation is used for responding on car seat, whether have passenger, and triggers described safe automobile air bag while having passenger by described igniting trigger circuit on seat.
3. safe automobile air bag electrical controller according to claim 1, it is characterized in that, described microprocessor comprises an AT89C52 micro controller system, by described AT89C52 micro controller system, receive described acceleration information, described left side sensory information and described right side sensory information, and control described warning circuit and report to the police.
4. safe automobile air bag electrical controller according to claim 1, it is characterized in that, described left side crash sensor and described right side crash sensor are electromechanical sensor, by the deceleration/decel information on left side and right side after described electromechanical sensor detection auto against.
5. safe automobile air bag electrical controller according to claim 1, it is characterized in that, described backup power comprises some conies, when described backup power cannot be worked for the main power source of safe automobile air bag, by described microprocessor, switch described backup power, and the ignition power supply of described safe automobile air bag is provided by described backup power.
6. safe automobile air bag electrical controller according to claim 1, it is characterized in that, described warning circuit comprises a protection crash sensor, and described protection crash sensor is a mercury switch, by described mercury switch, connects described microprocessor and described warning circuit.
7. a safe automobile air bag electric-control method, utilizes safe automobile air bag electrical controller as claimed in claim 1 to realize the Ignition Control of safe automobile air bag, it is characterized in that, comprises the steps:
(1) whether the main power source that detects described safe automobile air bag by described igniting trigger circuit powers, if this main power source is not powered, by described microprocessor, switches and start backup power;
(2) by described left side crash sensor and described right side crash sensor monitoring automobile left side and right side, whether bump, and left side sensor information and right side sensory information are sent to described microprocessor, by described microprocessor judges impact strength;
(3) by described data acquisition circuit, gather the acceleration/accel of automobile, and degree of will speed up information sends to described microprocessor;
(4) by described microprocessor, receive described left side sensor information, described right sensor information and described acceleration information, if described left side sensor information, described right sensor information and described acceleration information are all over threshold range, by described microprocessor, control described warning circuit and report to the police, and control described ignition trigger device and ignite described safe automobile air bag.
8. safe automobile air bag electric-control method according to claim 7, it is characterized in that, described step (4) also comprises: on the seat induction installation induction car seat by described igniting trigger circuit, whether have passenger, and on passenger's seat, ignite described safe automobile air bag having.
9. safe automobile air bag electric-control method according to claim 7, is characterized in that, described threshold value comprises left side collision threshold, right side collision threshold and acceleration rate threshold; Described left side collision threshold and described right side collision threshold are the deceleration/decel threshold value after auto against, and described deceleration/decel threshold value is 9-14km/h, and described acceleration rate threshold is frontal crash of vehicles acceleration rate threshold, is 15-30km/h.
CN201310748992.1A 2013-12-31 2013-12-31 Automobile airbag electric control device and control method thereof Pending CN103707834A (en)

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CN105905061A (en) * 2016-05-27 2016-08-31 浙江吉利控股集团有限公司 Seat adjusting device with tailgating protection function and seat adjusting method
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CN107776526A (en) * 2016-08-31 2018-03-09 比亚迪股份有限公司 Air bag system control method, air spring control and vehicle
CN112009569A (en) * 2019-05-30 2020-12-01 上海汽车集团股份有限公司 Active separation system for automobile, automobile body and auxiliary frame and active separation bolt thereof
CN112009569B (en) * 2019-05-30 2021-11-09 上海汽车集团股份有限公司 Active separation system for automobile, automobile body and auxiliary frame and active separation bolt thereof

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