CN103434505A - Automobile brake safety prompting method and system - Google Patents
Automobile brake safety prompting method and system Download PDFInfo
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- CN103434505A CN103434505A CN2013103929424A CN201310392942A CN103434505A CN 103434505 A CN103434505 A CN 103434505A CN 2013103929424 A CN2013103929424 A CN 2013103929424A CN 201310392942 A CN201310392942 A CN 201310392942A CN 103434505 A CN103434505 A CN 103434505A
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Abstract
The invention relates to the field of automobile safety and particularly relates to an automobile brake safety prompting method and an automobile brake safety prompting system. The automobile brake safety prompting method comprises the following steps: monitoring brake information in the brake process of the automobile in real time; comparing the brake information with a preset brake information threshold, and obtaining a warning signal if the brake information reaches the preset brake information threshold; and sending the warning signal to hazard warning lamps (namely the two flashing lights of the automobile in general) of the automobile. The automobile brake safety prompting system comprises a brake information monitoring unit, a processor and hazard warning lamps, through which each step of the automobile brake safety prompting method is realized. The automobile brake safety prompting method and the automobile brake safety prompting system can automatically warn vehicles behind and surrounding vehicles in the automobile brake process and the driver does not need to turn on the hazard warning lamps manually, so that the response time and manual operation time of the driver are saved, and the safety is high.
Description
Technical field
The present invention relates to field of automobile safety, relate in particular to automobile braking safety reminding method and system.
Background technology
Along with social development, the sustainable growth of number of vehicles, in the process of moving, rear-end collision takes place frequently automobile.
Rear-end collision occurs, normally because the unexpected sudden stop of front truck causes speed to descend rapidly, and although the chaufeur of rear car can see that the stoplight stop lamp of front truck lights, but this stoplight stop lamp only can remind the chaufeur front truck of rear car to brake, the chaufeur front truck that can't warn rear car just descends rapidly in the speed of a motor vehicle of sudden stop, front truck.
And automobile, in braking procedure, does not have a kind of safe reminding method automatic warning rear car and surrounding vehicles, to avoid accident at present.
Summary of the invention
The object of the present invention is to provide a kind of automobile braking safety reminding method and system, to address the above problem.
A kind of automobile braking safety reminding method, comprise the steps:
Braking information in the Real-Time Monitoring Motor Vehicle Braking Procedure;
Described braking information and default braking information threshold value are contrasted, if described braking information reaches described braking information threshold value, obtained alerting signal;
Described alerting signal is sent to the hazard warning lamp of automobile.
The embodiment of the present invention also provides a kind of automobile braking safety prompt system, comprises braking information monitoring means, treater and hazard warning lamp;
Described braking information monitoring means is for the braking information of Real-Time Monitoring Motor Vehicle Braking Procedure;
Described treater, for described braking information and default braking information threshold value are contrasted, if described braking information reaches described braking information threshold value, obtains alerting signal;
Described hazard warning lamp is used for receiving the alerting signal of described treater, and sends the danger warning flash of light according to described alerting signal.
Compared with prior art, the advantage of the embodiment of the present invention is: this automobile braking safety reminding method and system are in Motor Vehicle Braking Procedure, braking information in the Real-Time Monitoring Motor Vehicle Braking Procedure, for example instantaneous acceleration, momentary velocity etc., again the braking information of monitoring and default braking information threshold value are contrasted, if braking information reaches the braking information threshold value, obtain alerting signal, and then this alerting signal is sent to the hazard warning lamp of automobile.Because the hazard warning lamp of automobile is the general information warning of driving, when the hazard warning lamp flicker of vehicle, rear car and surrounding vehicles can be braked at once or be dodged, and avoid rear car and surrounding vehicles and this vehicle accident.This automobile braking safety reminding method and system energy automatic warning rear car and surrounding vehicles in Motor Vehicle Braking Procedure, safe.
The accompanying drawing explanation
The block diagram of the automobile braking safety reminding method that Fig. 1 is the embodiment of the present invention;
The instantaneous acceleration of utilizing that Fig. 2 is the embodiment of the present invention realizes the block diagram of automobile braking safety reminding method;
The momentary velocity that utilizes that Fig. 3 is the embodiment of the present invention obtains the block diagram of instantaneous acceleration;
The block diagram that obtains acceleration rate threshold that Fig. 4 is the embodiment of the present invention;
The momentary velocity that utilizes that Fig. 5 is the embodiment of the present invention is realized the block diagram of automobile braking safety reminding method;
The anti-lock braking system that utilizes that Fig. 6 is the embodiment of the present invention is realized the block diagram of automobile braking safety reminding method;
The system diagram of the automobile braking safety prompt system that Fig. 7 is the embodiment of the present invention;
The momentary velocity of the popular POLO that Fig. 8 is the embodiment of the present invention and stopping distance diagram of curves;
The momentary velocity of the popular golf that Fig. 9 is the embodiment of the present invention and stopping distance diagram of curves;
The momentary velocity of the popular Magotan that Figure 10 is the embodiment of the present invention and stopping distance diagram of curves;
The momentary velocity of the Q7 of Audi that Figure 11 is the embodiment of the present invention and stopping distance diagram of curves;
The differential method schematic diagram that Figure 12 is the embodiment of the present invention.
The specific embodiment
Below by specific embodiment, also by reference to the accompanying drawings the present invention is described in further detail.
Embodiment 1
Be illustrated in figure 1 a kind of automobile braking safety reminding method that the present embodiment provides, comprise the steps:
101, the braking information in the Real-Time Monitoring Motor Vehicle Braking Procedure;
102, braking information and default braking information threshold value are contrasted, if braking information reaches the braking information threshold value, obtain alerting signal;
103, alerting signal is sent to the hazard warning lamp of automobile.Wherein the hazard warning lamp of automobile is automobile double flashing light typically.
This automobile braking safety reminding method is in Motor Vehicle Braking Procedure, braking information in the Real-Time Monitoring Motor Vehicle Braking Procedure, for example instantaneous acceleration, momentary velocity etc., again the braking information of monitoring and default braking information threshold value are contrasted, if braking information reaches the braking information threshold value, obtain alerting signal, and then this alerting signal is sent to the hazard warning lamp of automobile.Because the hazard warning lamp of automobile is the general information warning of driving, when the hazard warning lamp flicker of vehicle, rear car and surrounding vehicles can be braked at once or be dodged, and avoid rear car and surrounding vehicles and this vehicle accident.This automobile braking safety reminding method energy automatic warning rear car and surrounding vehicles in Motor Vehicle Braking Procedure, safe.
In addition, in the automobile braking safety reminding method of the present embodiment, the braking information of Real-Time Monitoring automobile, when if braking information reaches default braking information threshold value, automatically trigger the hazard warning lamp flicker, degree of automation is high, does not need manually to spend reaction time and operating time to remove to open hazard warning lamp, get rid of human element, improved the speed of early warning.
Particularly, as shown in Figure 2, braking information comprises instantaneous acceleration; The braking information threshold value comprises acceleration rate threshold; Obtaining alerting signal comprises the steps:
201, the instantaneous acceleration in the Real-Time Monitoring Motor Vehicle Braking Procedure;
202, the absolute value of instantaneous acceleration and default acceleration rate threshold are contrasted, if the absolute value of instantaneous acceleration is greater than acceleration rate threshold, obtain alerting signal.
Wherein, the Real-Time Monitoring instantaneous acceleration comprises: by the instantaneous acceleration in acceleration pick-up Real-Time Monitoring Motor Vehicle Braking Procedure.Digital acceleration sensor can be installed on automobile, directly monitor the acceleration information in Motor Vehicle Braking Procedure.Perhaps, by alternate manner, obtain instantaneous acceleration, for example momentary velocity and time curve are carried out to differential.Particularly, as shown in Figure 3,
301, the momentary velocity in Negotiation speed sensor Real-Time Monitoring Motor Vehicle Braking Procedure, or directly from car running computer, transfer momentary velocity;
302, according to momentary velocity and time drafting momentary velocity and the time curve of monitoring;
303, momentary velocity and time curve are carried out to differential, obtain the instantaneous acceleration of random time in Motor Vehicle Braking Procedure.Wherein the differential equation of instantaneous acceleration is:
be a (t)=dv/dt, the momentary velocity that v (t) is a certain moment in curve, the momentary velocity in the moment after the Δ t time that v (t+ Δ t) is this moment.
In addition, as shown in Figure 4, default acceleration rate threshold comprises the steps:
401, accounting automobile is being implemented stopping distance and the momentary velocity of braking and is drawing momentary velocity and the stopping distance curve under initial velocity arbitrarily.Braking distance under hundred kilometers speed per hours of vehicle has become the important parameter of estimating automobile brake perfrmance, and each vehicle has the data of disclosed braking distance and speed.Certainly, the braking distance of vehicle sudden stop under any speed per hour can adopt identical test method to obtain with the data of speed.
402, according to momentary velocity and stopping distance curve obtain momentary velocity square with the stopping distance curve; Momentary velocity is carried out square, then by the momentary velocity that obtains square with the stopping distance curve plotting.
403, from momentary velocity square with the stopping distance curve the interval of intercepting stopping distance be from 0 1/2nd the segment of curve to maximum stopping distance.For triggering automobile hazard warning lamp more early, improve safety, before curve is carried out to differential, intercepting first half section curve, be stopping distance reach maximum stopping distance 1/2nd before, this section curve carried out to differential, can trigger early hazard warning lamp.
404, segment of curve is carried out to differential averaged, obtain reference acceleration;
405, reference acceleration is revised and taken absolute value according to default deadweight efficiency, obtain acceleration rate threshold.Due to the load-carrying difference of vehicle, can impact difference to stopping distance and the instantaneous acceleration of vehicle, for example, when vehicle load is large, it is little that instantaneous acceleration becomes, and stopping distance is long, and when vehicle load is light, instantaneous acceleration becomes greatly, and stopping distance is short.Because acceleration/accel and quality under the condition constant in the external force condition are inverse relation, can adopt deadweight efficiency to be revised reference acceleration, thereby reduce the impact of load-carrying on this automobile braking safety prompting mode reliability.It should be noted that, due to automobile in braking procedure, can adopt the method for test to utilize sensor to obtain acceleration rate threshold, also can use the differential method to obtain acceleration rate threshold simultaneously, in order further to improve safety, can acceleration rate threshold that use above-mentioned two kinds of methods to obtain be contrasted, chosen the numerical value of absolute value person less than normal in both as acceleration rate threshold.
In the present embodiment, the instantaneous acceleration that braking information comprises in embodiment 1, this braking information can also comprise the momentary velocity of running car.Correspondingly, the braking information threshold value comprises the triggering threshold speed; As shown in Figure 5, obtaining alerting signal comprises the steps:
501, the momentary velocity in the Real-Time Monitoring Motor Vehicle Braking Procedure; The monitoring of this momentary velocity can be used the speed sensor on vehicle to be monitored, and also can extract the momentary velocity data that car running computer generates.
502, momentary velocity is sent out to threshold speed with default waiting and contrasted, if being greater than, momentary velocity waits to send out threshold speed, obtain timing signal.Be about to momentary velocity and wait that sending out threshold speed is contrasted, if being greater than, momentary velocity waits to send out threshold speed, vehicle may be in running on expressway, system can record and enter the time of travelling in expressway, if being less than, momentary velocity waits to send out threshold speed, vehicle may travel on general urban highway, does not need the triggering system timing.
503, record automobile according to timing signal and be greater than the duration of waiting to send out threshold speed at momentary velocity.
504, if duration is greater than default duration threshold value, obtain treating give a signal.Obtain after give a signal, the hazard warning lamp of vehicle is in arm-to-arm.
505, according to treating give a signal, momentary velocity and default triggering threshold speed are contrasted, if momentary velocity is greater than the triggering threshold speed, obtain alerting signal.
Preferably, wait that sending out threshold speed is 95 kilometer per hours; The duration threshold value is 10 seconds.The Maximum speed limit of considering China's urban district connecting line highway is 90 kilometer per hours, wait to send out threshold speed and be set to 95 kilometer per hours, the duration threshold value is 10 seconds, after reaching these two conditions, the hazard warning lamp of vehicle is in arm-to-arm, avoid vehicle to open by mistake hazard warning lamp when lower-speed state, avoid the vehicle short time overtake other vehicles and cause arm-to-arm simultaneously.
Under arm-to-arm, the momentary velocity in the Real-Time Monitoring Motor Vehicle Braking Procedure; Wherein the monitoring of this momentary velocity can be used the speed sensor on vehicle to be monitored, and also can extract the momentary velocity data that car running computer generates.Then momentary velocity and default triggering threshold speed are contrasted, if momentary velocity is less than the triggering threshold speed, obtained alerting signal.
Pass through the present embodiment, can judge whether automobile reaches express highway, and judge parking queuing or ease ahead queuing situation under non-emergent brake condition, and then trigger the automobile hazard warning lamp, evade the risk that knocks into the back that the highway automobile parking is queued up or low speed is queued up (target vehicle is in the queuing tail of the queue).
Embodiment 3
In embodiment 1, braking information wherein can also comprise the time length of anti-lock braking system signal; The braking information threshold value comprises the time length threshold value of anti-lock braking system signal; As shown in Figure 6, obtaining alerting signal comprises the steps:
701, the time length of the anti-lock braking system signal in the Real-Time Monitoring Motor Vehicle Braking Procedure;
702, the time length threshold value of the time length of anti-lock braking system signal and default anti-lock braking system signal is contrasted, if the time length of anti-lock braking system signal is greater than the time length threshold value, obtain alerting signal.Wherein the time length threshold value of anti-lock braking system signal can for 1 second or 1.5 seconds or At All Other Times, time threshold also can obtain by lot of experiments.
Certainly, the momentary velocity of exporting except car running computer can trigger two the sudden strain of a muscle Warning lights, other signal of car running computer output also can trigger two Warning lights that dodge, such as brake weight, brake pedal responsiveness etc., any car running computer signal relevant to emergency braking in other words, can be as the basis of judgement sudden stop.
Embodiment 4
As shown in Figure 7, a kind of automobile braking safety prompt system, comprise braking information monitoring means, treater 805 and hazard warning lamp 804; The braking information monitoring means is for the braking information of Real-Time Monitoring Motor Vehicle Braking Procedure; Treater 805, for braking information and default braking information threshold value are contrasted, if braking information reaches the braking information threshold value, obtains alerting signal; Hazard warning lamp 804 is for the alerting signal of receiving processor 805, and sends the danger warning flash of light according to alerting signal.
Particularly, the braking information monitoring means comprises acceleration pick-up 802 or speed sensor 803 or anti-lock braking system signal or other signal monitoring modules 801 relevant to braking by car running computer output.The information of degree of will speed up sensor 802 or speed sensor 803 or 801 monitorings of signal monitoring module sends to treater 805, treater 805 is contrasted according to the braking information threshold value set in advance, and the alerting signal obtained is sent to hazard warning lamp 804.
In order further to warn rear car and surrounding vehicles, this automobile braking safety prompt system also comprises wireless launcher 806, radio receiver 807 and auxiliary heads-up display 808; Wireless launcher 806 is electrically connected to treater 805, for the alerting signal of receiving processor 805; Radio receiver 807 and wireless launcher 806 wireless connections; Auxiliary heads-up display 808 is electrically connected to radio receiver 807, for receive alerting signal that radio receiver 807 sends and according to alerting signal demonstration assist information warning.Wherein auxiliary heads-up display 808 can be two, lays respectively at the both sides of vehicle rear window glass.The automobile braking safety prompt system of the embodiment of the present invention, after opening hazard warning lamp, when closing hazard warning lamp, needs chaufeur manually to close.
Embodiment 5
The present embodiment is made concrete data description to the embodiment of front.When the determination of acceleration threshold value, can implement stopping distance and the momentary velocity of braking and draw momentary velocity and the stopping distance curve under initial velocity arbitrarily by accounting automobile.Because the braking distance under hundred kilometers speed per hours of vehicle has become the important parameter of estimating automobile brake perfrmance, the present embodiment is for compact car, compact sedan, in-between car, tetra-kinds of other automobiles of level of SUV, preferably select the braking distance data of hundred kilometers speed per hours of popular POLO, popular golf, popular Magotan and tetra-sections of vehicles of the Q7 of Audi, draw corresponding momentary velocity and stopping distance curve, concrete momentary velocity and stopping distance curve are as shown in Figure 8, Figure 9, Figure 10 and Figure 11.By momentary velocity and stopping distance curve, can see that each curve exists
there is the local linear feature in interval, wherein S
0be the stopping distance of hundred kilometers speed per hours, can choose
interval as research object, before all one's effort auto in Braking arrives 1/2nd braking distances, can judge emergency situation by comparing instantaneous acceleration and acceleration rate threshold, thereby trigger hazard warning lamp earlier.
By momentary velocity and stopping distance Drawing of Curve momentary velocity square with the stopping distance curve, this curve is carried out to differential and obtains instantaneous acceleration.According to Differential Principle, as shown in figure 12, momentary velocity square can be considered as being formed by countless sections straight lines with the stopping distance curve, when △ S is tending towards infinitely small, each section all can be considered as uniformly accelrated rectilinear motion, according to the acceleration/accel inference
can obtain the differential equation of acceleration/accel:
Be a (s)=0.5dv
2/ ds.
By the braking distance data under hundred kilometers speed per hours, the acceleration information that obtains utilizing the differential method to calculate is:
From the difference ratio,
in interval, the aviation value difference of the acceleration/accel aviation value that the differential method is calculated and the acceleration measurement of acceleration pick-up actual monitoring is less, for security consideration, chooses the absolute value smaller as the reference acceleration/accel among the two.
Approx, suppose that the suffered external force of automobile is constant, consider the impact of vehicle load on acceleration/accel, acceleration/accel and car mass are inversely proportional to.Vehicle, except curb mass, also will the consideration personnel be taken and the factor of loading, and therefore, also choosing of acceleration rate threshold need to, in the situation that reference acceleration is considered the load-carrying of vehicle, further be revised.
The test load condition of aforementioned momentary velocity and stopping distance curve is single chaufeur steering vehicle.Supposing under the condition that outside vehicle resistance (frictional ground force and air resistance) is constant, if further consider passenger-cargo quality, the value of acceleration/accel will be partial to conservative more, be conducive to the realization of Security Target.
This case all be take 5 vehicles as investigating object, and the member is divided into 1 people-5 people and does not wait, and everyone counts according to 75kg weight, and rear-box loading quality is supposed according to 100kg.
For simplicity, suppose to take 1 people identical to the probability of taking 5 people, aviation value=the 75+(1+2+3+4+5 of people's goods quality)/5+100=325kg
Certainly, also can further carry out statistical investigation work future, and investigation automobile passenger is from 1 chaufeur to the full corresponding actual probabilities of 5 people, and the probability under various pay load level, thereby obtain the mathematical expectation of automobile manned cargo-carrying quality, then bring table into and calculate.
The form that reference acceleration is revised is:
The correction reference acceleration arr obtained based on said method has envelope and conservative property, under the prerequisite of overriding concern safety, acceleration rate threshold can near the certain interval revising reference acceleration arr in value.
Embodiment 6
Above embodiment can for this reason, can integrate above-described embodiment the formation system as the mode that triggers the automobile hazard warning lamp, each passage be or logical relation.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. an automobile braking safety reminding method, is characterized in that, comprises the steps:
Braking information in the Real-Time Monitoring Motor Vehicle Braking Procedure;
Described braking information and default braking information threshold value are contrasted, if described braking information reaches described braking information threshold value, obtained alerting signal;
Described alerting signal is sent to the hazard warning lamp of automobile.
2. automobile braking safety reminding method as claimed in claim 1, is characterized in that, described braking information comprises instantaneous acceleration; Described braking information threshold value comprises acceleration rate threshold; Obtaining described alerting signal comprises the steps:
Instantaneous acceleration in the Real-Time Monitoring Motor Vehicle Braking Procedure;
The absolute value of described instantaneous acceleration and default acceleration rate threshold are contrasted, if the absolute value of described instantaneous acceleration is greater than described acceleration rate threshold, obtained alerting signal.
3. automobile braking safety reminding method as claimed in claim 2, is characterized in that, the described instantaneous acceleration of Real-Time Monitoring comprises:
By the instantaneous acceleration in acceleration pick-up Real-Time Monitoring Motor Vehicle Braking Procedure; Or,
Momentary velocity in Negotiation speed sensor Real-Time Monitoring Motor Vehicle Braking Procedure;
Momentary velocity and time drafting momentary velocity and time curve according to monitoring;
Described momentary velocity and time curve are carried out to differential, obtain the instantaneous acceleration of random time in Motor Vehicle Braking Procedure.
4. automobile braking safety reminding method as claimed in claim 2, is characterized in that, default described acceleration rate threshold comprises the steps:
Accounting automobile is being implemented stopping distance and the momentary velocity of braking and is drawing momentary velocity and the stopping distance curve under initial velocity arbitrarily;
According to described momentary velocity and stopping distance curve obtain momentary velocity square with the stopping distance curve;
From described momentary velocity square with the stopping distance curve the interval of intercepting stopping distance be from 0 1/2nd the segment of curve to maximum stopping distance;
Described segment of curve is carried out to differential averaged, obtain reference acceleration;
Described reference acceleration is revised and taken absolute value according to default deadweight efficiency, obtained described acceleration rate threshold.
5. automobile braking safety reminding method as claimed in claim 1, is characterized in that, described braking information comprises the momentary velocity of running car; Described braking information threshold value comprises the triggering threshold speed; Obtaining described alerting signal comprises the steps:
Momentary velocity in the Real-Time Monitoring vehicle traveling process;
Described momentary velocity is sent out to threshold speed with default waiting and contrasted, if described momentary velocity is greater than described waiting, send out threshold speed, obtain timing signal;
Record automobile according to described timing signal and be greater than the described duration of waiting to send out threshold speed at momentary velocity;
If described duration is greater than default duration threshold value, obtain treating give a signal;
According to the described give a signal for the treatment of, described momentary velocity and default triggering threshold speed are contrasted, if described momentary velocity is less than described triggering threshold speed, obtain alerting signal.
6. automobile braking safety reminding method as claimed in claim 5, is characterized in that, described to wait to send out a threshold speed be 95 kilometer per hours; Described duration threshold value is 10 seconds.
7. automobile braking safety reminding method as claimed in claim 1, is characterized in that, described braking information comprises the time length of anti-lock braking system signal; Described braking information threshold value comprises the time length threshold value of anti-lock braking system signal; Obtaining described alerting signal comprises the steps:
The time length of the anti-lock braking system signal in the Real-Time Monitoring Motor Vehicle Braking Procedure;
The time length threshold value of the time length of described anti-lock braking system signal and default anti-lock braking system signal is contrasted, if the time length of described anti-lock braking system signal is greater than described time length threshold value, obtained alerting signal.
8. an automobile braking safety prompt system, is characterized in that, comprises braking information monitoring means, treater and hazard warning lamp;
Described braking information monitoring means is for the braking information of Real-Time Monitoring Motor Vehicle Braking Procedure;
Described treater, for described braking information and default braking information threshold value are contrasted, if described braking information reaches described braking information threshold value, obtains alerting signal;
Described hazard warning lamp is used for receiving the alerting signal of described treater, and sends the danger warning flash of light according to described alerting signal.
9. automobile braking safety prompt system as claimed in claim 8, is characterized in that,
Described braking information monitoring means comprises the signal monitoring module of acceleration pick-up or speed sensor or anti-lock braking system.
10. automobile braking safety prompt system as claimed in claim 9, is characterized in that, also comprises wireless launcher, radio receiver and auxiliary heads-up display;
Described wireless launcher is electrically connected to treater, for the alerting signal of receiving processor; Radio receiver and wireless launcher wireless connections; Auxiliary heads-up display is electrically connected to radio receiver, for receive alerting signal that radio receiver sends and according to alerting signal demonstration assist information warning.
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| CN113771823A (en) * | 2021-09-02 | 2021-12-10 | 东风华神汽车有限公司 | Automobile brake monitoring system and application method thereof |
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