CN2664958Y - Early warning device for preventing car-following - Google Patents
Early warning device for preventing car-following Download PDFInfo
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- CN2664958Y CN2664958Y CN03261189.7U CN03261189U CN2664958Y CN 2664958 Y CN2664958 Y CN 2664958Y CN 03261189 U CN03261189 U CN 03261189U CN 2664958 Y CN2664958 Y CN 2664958Y
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Abstract
The utility model relates to an anti rear collision warning device for vehicle, which comprises a voltage follower (2) whose input end is connected with the voltage output end of a throttle sensor (1) of an electric control fuel injection system, a voltage differential circuit (3) whose input end is connected with the output of the voltage follower (2), a voltage comparator 4 whose one input end is connected on a preset threshold voltage and the other input end is connected with the output end of the voltage differential circuit (3), a warning timing circuit (5) whose input control end is connected with the output end of the voltage comparator (4), a group of warning equipment electric control switches whose input control end is connected with the warning timing circuit (5), whose output end is connected with a warning equipment (7). The warning control signal can be achieved by the utility model through the present sensor and the equipment on the vehicle, so that the new sensor does not need to be installed, and the warning can be operated fast and accurately.
Description
Technical field
The utility model relates to a kind of promptly subtracting oil or emergency brake early warning, safety distance early warning and overtaking other vehicles and reply the device of early warning of rear-end collision that prevent.
Background technology
As everyone knows, the rear-end collision of self-propelled vehicle has caused huge personal casualty and economic loss.For this reason, thousands of scientific worker makes great efforts for addressing this problem to have made untiringly.The effective ways that solve this difficult problem are timely communications of running information between the car before and after strengthening.Old driver is for preventing that the rear-end collision problem from having said words full of insights: " be not do less than, but do not know when waiting you to know, all full evenings ".From here as can be seen, in the process of moving before and after the importance of " in advance " communication between the car.Wherein to be that front truck is urgent slow down or during emergency brake one of most important information, can " in advance " car early warning backward, and so-called " in advance " is meant that " surpassing " at driver's brake pedal it " preceding " of also not stepping on, just light stoplight stop lamp automatically.Second important information that will in time link up is that when front truck was found the back car too near oneself, how backward car sounded a warning, and it is kept a safe distance, and the hidden danger that knocks into the back is got rid of in bud." laws are not fully observed for safety distance ", this also is the difficult problem that the whole world does not have solution.Can not keep a safe distance also is to cause one of major reason that knocks into the back.The 3rd important information that will in time link up be, when back car required to overtake other vehicles, how front truck gave clear and definite replying, and can not be completely to ignore, and causes the back car " blindly to overtake other vehicles ", and this also is the major reason that causes serious accident.And these three problems are mutually related again, because early warning is not replied in the request of overtaking other vehicles for early stage back car, cause the back car blindly to overtake other vehicles, and close to front truck at a high speed, the danger of knocking into the back has just entered mid-term; When after car near front truck, if this moment, front truck did not also sound a warning, it is in time slowed down keeps a safe distance, like this, the danger of knocking into the back has just entered the later stage; Arrived hairtrigger condition, in case the emergency brake situation occurs, rear-end collision must take place; If can advanced early warning when emergency brake, can make rear-end collision be light calamity by heavy catastrophe, otherwise certainly will cause even more serious pernicious rear-end collision.So, preventing rear-end collision, will set up defenses in depth, in all strong safeguard procedures of each stage of rear-end collision development.And strive for rear-end collision is eliminated in bud,
Shift to an earlier date the problem of car early warning backward during emergency brake, the difficult point of technology and emphasis are how to obtain " early warning control signal " or be called " first signal " here.As long as because obtained " early warning control signal ", how afterwards in the process this electric signal is amplified, various processing such as conversion are reported to the police until the control source of early warning, and this is not the thing of difficulty concerning the Eltec of today.
In disclosed this class technology at present, all the emphasis of research is concentrated on the sensor how an energy detection vehicle deceleration/decel is installed on vehicle, utilize its to obtain " early warning control signal ".For example, in CN97250985, be installed in to survey on the throttle gate as sensor with potential device and subtract speed oil; In CN99211066, survey as sensor and subtract speed oil with being fixed on the car body two photoelectric switchs and being fixed on the accelerator pedal arm shade; In US005387898A, it is to utilize the close-up crystal unit and the inertia weights that are installed on the throttle linkage to detect the throttle linkage deceleration value as sensor; In US6023221, the longitudinal deceleration degree that an acceleration pick-up detects vehicle is installed onboard; In US6559775, a sensor of surveying deceleration/decel is installed on speed reduction gearing, obtain " early warning control signal ".
But confirm that in practice the greatest difficulty that prior art runs into is deceleration/decel Design of Sensor and installation question: (1) for the acquisition " early warning control signal " of morning, sensor self must be responsive; (2) sensor must be installed in the position that deceleration tolerance takes place on the vehicle the earliest, (3) sensor energy disturbance rejection, and stable performance, the life-span is long; (4) want small size, be convenient to find installing space; (5) want cost low energy to be accepted by market.In the face of the continuous thousands of money vehicles that change, satisfy above-mentioned requirements really is a hang-up.Wherein, installation question the most difficult or sensor.Because vehicle is the machine of a high-speed motion on different kinds of roads, it is standing vibration and is impacting under the situation of bearing a heavy burden.For sensor installation is made a call to a slight screw hole on some parts, the stress concentration that it produced under the effect of vibration and impulsive force, may make these parts shift to an earlier date fatigue damage.This can bring very big hidden danger to vehicle safety.Let alone on the driving engine under High Temperature High Pressure and the synergy of impact shock power sensor installation, that in addition can cause the evaluation again of engine health.Moreover for some vehicle, just can not find the space of sensor installation, therefore, this makes prior art be difficult to be applied at all.
In addition, various laser radars, microwave radar or photoreceptor etc. are installed in US6369369, US6335682, US6292753, DE19806687, US6278630, US5931547 and US5929785 onboard, survey the distance of the place ahead obstacle and according to the speed of a motor vehicle decision whether brake to back car early warning.The problem that this method exists is, it is based on the strict safety shut-down distance that keeps for prerequisite.In fact, causing the true cause that knocks into the back is the asynchronous of front and back car brake.The deceleration method for early warning is from reduce the time difference of front and back car brake, prevent the generation of rear-end collision as far as possible; And with the method for surveying the place ahead obstacle distance, be that the hysteresis of car brake time prevents to knock into the back before and after coming to compensate with the brake safety distance.But for the crowded situation of vehicle on the present road, especially in the commuter time or when weekend, vehicle was relatively crowded, be difficult to the safety distance between the assurance vehicle, install the car of distance measuring equipment (DME) in order to keep a safe distance this moment, can only wait for by brake deceleration, the car that apomecometer is not installed then constantly is inserted in its place ahead one by one, if want driving, just must turn off distance measuring equipment (DME).At this moment, be considered to FA distance measuring equipment (DME) with regard to becoming a costliness not beautiful decorative fitting.
When too approaching front truck about the back car, how backward the front truck car sounds a warning, the problem that it is kept a safe distance, propose on front truck, to install laser, microwave radar and supersonic range finder as US5760708, US6225918 and US6360170, the distance after surveying between car and the front truck and the relative velocity of back car and front truck.When find the back car enter predetermined dangerous area and continue at a high speed to front truck near the time, front truck just backward car give a warning.But all also there are some problems in these distance measuring equipment (DME)s, and Laser Measuring and microwave radar are too big apart from the device blind area, and to making a mistake with close object is easy more, the hypracoustic propagation speed is slower, and very fast when the speed of a motor vehicle, spacing just can't use when far away.And when road is very crowded,, think it is same the car on the moving traffic lane by mistake often the car on the adjacent lines track of travelling very close in the same way, be easy to generate wrong report.
Summary of the invention
One of the purpose of this utility model, the prior-warning device that prevents rear-end collision of car early warning backward when providing a kind of front truck and promptly subtracting oil, it utilizes vehicle existing sensors and equipment to obtain " early warning control signal ", avoids the installation question of sensor, and can carry out early warning rapidly and accurately.
Another free-revving engine of the present utility model is to provide a kind of instrument to the front truck driver, in the process of moving, in case find that the back car is too near oneself, he can be under situation about not touching on the brake, by prior-warning device backward car give a warning, remind the back car to slow down and keep a safe distance, the danger of rear-end collision is eliminated in bud.
Another purpose of the present utility model is that also car can be strengthened linking up before and after making by prior-warning device on " overtaking other vehicles " problem, front truck can provide clear and definite replying for " overtaking other vehicles " request of back car, the serious consequence of avoiding the back car blindly to overtake other vehicles and caused.
Another purpose of the present utility model is, by prior-warning device backward the car driver front truck is provided is the emergency brake or the information of non-emergent brake.
The problem of car early warning backward when 1, promptly subtracting oil or emergency brake about front truck
Fortunately, when the deceleration early warning technology got into a difficult position, the utility model had found a broad level road that subtracts oily early warning from the injection of fuel technical field finally.Proposition realizes the new mode of " subtracting oily early warning " on the basis of engine fuel injection system.
First engine fuel injection system begins since BOSCH company in 1967 releases in the world, because its outstanding effect aspect the saving energy and exhaust gas cleaning discharging, after this, each big car company is all finished the engine fuel injection system of developing oneself mutually, up to the present, China is the same with developed country, the hundred-percent fuel injection systems of all having installed of the automobile of new production.
The file of a combustion engine Jetronic of Nissan Motor company is provided in US4383515, and it has narrated a typical fuel-injected process.In the vehicle ' process, the driver is according to the step on the throttle degree of pedal of his desirable moving velocity decision, because the degree that aperture is with Das Gaspedal is stepped on of throttler valve is directly proportional, and the suction quantity of each commentaries on classics of driving engine is to be directly proportional with the aperture of throttle gate, the output Q of airmoter is directly proportional with suction quantity, computing machine in the Jetronic calculates basic fuel injection amount T (p)=(Q/N) the * CONSTANT of each commentaries on classics according to the output of airmoter and the rotational speed N of driving engine (rpm), other operating parameters according to driving engines such as a theoretical best empty combustion ratio and cooling water temperatures calculate a coefficient of correction COEF then, calculate actual fuel injection amount T (i)=T (p) the * COEF. of each commentaries on classics of driving engine at last.
From the above mentioned as can be known, for injection of fuel, for the vehicle handling quality that obtains, it wishes to understand timely the control intention of driver to car speed; For this reason, it has installed these throttle sensor relevant with fuel charge and computing machines such as dynamoelectric accelerograph pedal sensor, throttle position sensor and electrical air flow counter, calculate fuel injection amount in time to reach, respond the operation of driver as soon as possible the speed of a motor vehicle.The increase of fuel charge or minimizing will indicate directly that vehicle is to quicken or deceleration; The pace of change that fuel charge increases or reduces will directly indicate the size of vehicle acceleration or deceleration/decel; So the throttle sensor of fuel injection systems is perception driver a intention that vehicle is quickened or slows down the earliest.Thus, as can be seen, the pace of change of fuel injection systems throttle sensor output is detected, when subtracting speed oil and meet or exceed a certain predetermined value, just can produce premium-quality " early warning control signal ".Subtract oil formerly, slow down after.Just be based on this point, the utility model proposes method that usefulness " subtracts oily early warning " and solve " deceleration early warning " this difficult problem.
The explanation of important terms: (1) " throttle sensor " can be airmoter, electricity-controlling throttle pedal sensor or the throttle position sensor of fuel injection systems; Airmoter comprises tab style airmoter, toll bar spiral vortex type airmoter, hot wire air flowmeter, hot film type air flowmeter and collector pressure formula airmoter again; (2) source of early warning, the said source of early warning of the utility model comprises the original stoplight stop lamp of vehicle at least, in addition, can also be to aim at early warning and redness, green and yellow high brightness lamp or flash light or the read-out set up, sound source of early warning and radio source of early warning.These sources of early warning that increase newly are assisted original stoplight stop lamp, and car is passed on more about the deceleration of front truck and the trend of travelling backward.For example, differentiation is emergency brake, and whether still non-emergent brake allows to overtake other vehicles etc.
Promptly subtract oil or the brake advanced early warning can adopt following technical scheme to realize;
A kind of prior-warning device that prevents rear-end collision, this device comprises:
One voltage follower (2), its input end are connected on the voltage output end of the throttle sensor (1) of electric control fuel oil jet system, directly obtain the driver and control the very early time information that throttle makes vehicle quicken or slow down from the output voltage of throttle sensor (1);
A voltage derivative circuit (3), its input end is connected on the mouth of voltage follower (2), and the output voltage of voltage follower (2) is carried out the analog differentiation computing, and what detect the driver promptly subtracts speed oil;
A voltage comparator 4, an one input end is connected on the default threshold voltage, another input end is connected on the mouth of voltage derivative circuit (3), when the output voltage of voltage derivative circuit (3) made this terminal voltage of voltage comparator (4) meet or exceed the default threshold voltage of the other end, the upset saltus step took place in the output voltage of voltage comparator (4);
An early warning timing circuit (5), its input control end is connected on the mouth of voltage comparator (4), when the upset saltus step takes place in the output voltage of voltage comparator (4), its output voltage generation saltus step of early warning timing circuit (5);
One group of source of early warning electric-controlled switch (6), its input control end is connected on the mouth of early warning timing circuit (5), its mouth is connected in a source of early warning (7), when early warning timing circuit (5) is in the early warning definition status, its the closed conducting of output voltage control source of early warning electric-controlled switch (6), source of early warning (7) sends the brake early warning signal in the timer-operated time of early warning.
Below each component part of the present utility model is further described specifically:
(1) voltage follower, its input end is connected on the voltage output end of fuel injection systems throttle sensor.Because the characteristics of voltage follower are that output voltage and input voltage are big or small and phase place is almost equal, and have very high input impedance and very low output impedance.So, be connected on the mouth of throttle sensor with voltage follower, other follow-up early warning circuit is connected on the mouth of voltage follower; And directly they not being connected on the voltage output end of fuel injection systems throttle sensor, its reason has three: one can obtain the voltage identical with the throttle sensor voltage output end from the voltage follower mouth; Its two, throttle sensor and follow-up early warning circuit are kept apart, do not allow follow-up early warning circuit influence the work of fuel injection systems.Because the input impedance of voltage follower is generally 10,000 megaohms to a tregohm, and the output impedance of throttle sensor is about several kilo-ohms to tens kilo-ohms, the precision of fuel injection systems is 2%.So the access of voltage follower can not influence the normal operation of fuel injection systems.But, because the input impedance of follow-up early warning circuit is about several kilo-ohms to tens kilo-ohms.If it directly is connected on the mouth of throttle sensor, will have a strong impact on the work of fuel injection systems.Its three, the output impedance of voltage follower is about several ohm, it has very strong load-carrying capacity.In sum, voltage follower has played isolation and impedance change action, and it had both made forewarn system in time obtain the output voltage of throttle sensor, did not influence the work of fuel injection systems again, but also obtain very strong load-carrying capacity, for forewarn system provides a premium-quality signal source.Because voltage follower is primary element commonly used in the electronic engineering, so its form is a lot, both can on market, buy its multiple simulation integrated package, LM110 etc. for example also can be with the device oneself composition of op amp or high-amplification-factor.
(2) voltage derivative circuit, it normally constitutes with resistance R and capacitor C series connection, input end be connected on the mouth of voltage follower, its mouth is the point of connection of resistance and electric capacity, in the utility model, its effect is a pace of change of measuring the throttle sensor output voltage, i.e. throttle pace of change, thus detect subtracting speed oil and whether meeting or exceeding the predetermined speed oil that promptly subtracts of driver.The RC value of selecting a differential circuit in advance is as predetermined value, when throttle reduces descending slope that speed makes the throttle sensor output voltage and meets or exceeds the predetermined value of differential circuit output voltage descending slope, thinks that then this time subtracting oil belongs to and promptly subtract oil.Owing to promptly subtract the unexpected reduction that oil can directly cause car speed, and even more serious be that often promptly subtracting oil is emergency brake " tendency ".So see that from subtracting speed oil car sends early warning backward this moment.But whether final decision is sent early warning, also to further differentiate this time to subtract expression that oil is driver's true operation intention or owing to disturb and cause? in use can subtract the speed oil predetermined value by adjusting resistance or capacitance adjustment.
(3) voltage comparator, its general using method are that applied signal voltage is connected on its input end, and another input end is connected on the default threshold voltage.When applied signal voltage met or exceeded the default threshold voltage of the other end, the upset saltus step took place in the output voltage of comparator.But, voltage comparator in electronic engineering be one basic and be the parts of using always, except two numbers were compared, it can also develop two numbers summation back and relatively wait with a number on this basis.In embodiment of the present utility model, be that negative-phase input with comparator passes through resistance eutral grounding, making default threshold voltage is zero, and at the voltage comparator normal phase input end, be that signal input part is provided with a bias voltage again, when the output voltage of differential circuit and bias voltage sum less than zero the time, the upset saltus step takes place in the output voltage of voltage comparator.Just can think this moment this time promptly to subtract the expression that oil is driver's true operation intention, rather than accidental interference causes.So this bias voltage can not be provided with too little, otherwise when on the road of vehicle ' in injustice, cause that from ground-surface impact the pin that the driver tramples Das Gaspedal produces a little shake fast, this may cause the mistake early warning; But this bias voltage can not be provided with too greatly, otherwise it can make sensitivity too low, produces under little throttle situation and fails to report.For voltage comparator, both can on market, buy its simulation integrated package, for example, LM111 etc. also can form with integrated operational amplifier oneself.
(4) early warning timing circuit, its input trigger end is connected on the mouth of voltage comparator.When the upset saltus step takes place in the output voltage of voltage comparator, triggered the early warning timing circuit, make it enter early warning timing working state.At this moment, the saltus step of also overturning of the output voltage of early warning timing circuit, and this state remains to pre-warning time always and finishes, and its output voltage is just got back to initial readiness for action again.For the early warning timing circuit, can the time spent base circuit chip, for example NE555, or univibrator integrated package, CD4098 for example adds that suitable timing resistor electric capacity just can form mono-stable timing circuit.Also can form mono-stable timing circuit with gate circuit or aerotron.
(5) source of early warning electric-controlled switch, its input control end is connected on the mouth of early warning timing circuit.When the early warning timing circuit enters the early warning definition status, when output voltage also overturn saltus step, it made the conducting of source of early warning switch closure, makes source of early warning send early warning.For the source of early warning electric-controlled switch, it can be a high-power semiconductor switch, for example IRF9540, or high power relay, for example 943-1C-12DS.According to the needs of early warning, the quantity of source of early warning electric-controlled switch can be one or several.
More than 5 parts be to constitute element of the present utility model.But, only have these 5 parts can't finish the emergency brake task that gives warning in advance.Also must " borrow " throttle sensor, obtain the magnitude of voltage of throttle sensor output therefrom with former vehicle.The variation of this voltage the most directly gives expression to the operation intention of driver's control vehicle speed, and the variation of this voltage also is before changes in vehicle speed, the signal that " the earliest " advance notice speed of a motor vehicle changes.For " early warning ", " the earliest " two words are very valuable.So-called " the earliest " is because the variation of the speed of a motor vehicle is after this signal, also will experience a series of processes.This process comprises the sampling analysis of computing machine to this voltage, calculate fuel injection amount, injection of fuel is gone into cylinder, wait for next stroke IFO intermediate fuel oil combustion explosion, by transmission device power is passed to tire then, at this moment just torsional moment is become onward impulse, after vehicle was subjected to the effect of onward impulse, the speed of car just can change.So salient point of the present utility model just is " a borrowing " word, not only " borrow " ingeniously, and " borrowing " must get well.Second " borrowing " word of the present utility model is to use the stoplight stop lamp of former vehicle as basic source of early warning.This meets up-to-date technology very much, and the First Principles that new product comes into the market promptly " is not violated tradition " as far as possible on man-machine interface.Because stoplight stop lamp used more than 100 year as car retardation brake signal equipment, the driver has also set up conditional reflex system.So any improvement to the slowing-down brake signalling set must progressively import on the basis of stoplight stop lamp.Erect image is installed high-mount stop lamp, and it is the same to remove original stoplight stop lamp, otherwise the loss that causes is huge.
2, about the back car too when the front truck, the problem how front truck sounds a warning
The utility model adopts increases a safety distance warning switch on a certain link of prior-warning device, activate prior-warning device artificially with this switch, by prior-warning device backward car sound a warning, force it to keep a safe distance.Such scheme can be avoided source of early warning to repeat to be provided with a large amount of leads being connected, and is not only simple but also reliable.
It can be realized with following technical scheme:
(1) one of a hand switch is terminated on the control input end of source of early warning electric-controlled switch, the other end of hand switch is connected on the conducting CONTROLLED POTENTIAL of source of early warning electric-controlled switch, when hand switch is closed, the whole closed conductings of source of early warning electric-controlled switch, the control source of early warning sends early warning.
(2) one of a hand switch is terminated on the trigger end of early warning timing circuit, the other end is connected on the triggering CONTROLLED POTENTIAL of timing circuit, when hand switch is closed, the early warning timing circuit is triggered and enters the early warning definition status, its output voltage makes the whole closed conductings of source of early warning electric-controlled switch, and the control source of early warning sends early warning.
(3) one of a hand switch is terminated at an input end of voltage comparator, the other end is connected on the upset CONTROLLED POTENTIAL of voltage comparator, when hand switch is closed, the output voltage upset of voltage comparator, the early warning timing circuit is triggered enters the early warning definition status, its output voltage makes the whole closed conductings of source of early warning electric-controlled switch, and the control source of early warning sends early warning.
In these three schemes, wherein alternative plan is relatively good.Because it has utilized the early warning timing circuit, so the driver just can make stoplight stop lamp light one period schedule time as long as touch switch with hand during early warning; Secondly, switch disturbs from inserting here to be not easy to produce.
This second scheme is specially, also comprise a safety distance warning switch (8) in this device, its mouth is connected on the input control end of early warning timing circuit (5), when the back car too when the front truck, the condition that oil does not brake can not subtracted, warn switch (8) to trigger early warning timing circuit (5) with safety distance and enter the early warning definition status, make the closed conducting of source of early warning electric-controlled switch (6), control source of early warning (7) sends the brake early warning signal in the timer-operated time of early warning, allow the back car slow down and keep a safe distance.
When 3, overtaking other vehicles about back car request, the problem how front truck replys
(1) allows to overtake other vehicles: a flashed green signal lamp is installed at the front truck afterbody; And the control corresponding switch is installed on driver's control panel.When request of overtaking other vehicles of receiving the back car, the front truck driver if allow the back car to overtake other vehicles, just puts the flicker signal 1-2 second of bright green according at that time situation;
(2) do not allow to overtake other vehicles: click safety distance warning switch, light stoplight stop lamp and red flicker signal 1-2 second, allow the back car slow down and keep a safe distance.
Allow to overtake other vehicles and can realize with following technical scheme:
One of a button switch is terminated on the input trigger end of a timing circuit, the other end is connected on the triggering CONTROLLED POTENTIAL of this timing circuit, when button switch closed moment, timing circuit is triggered and enters the timing working state, be subjected to the closed conducting of an answering equipment electric-controlled switch of the output voltage control of timing circuit, make the flashed green signal lamp that is connected on this switch light 1-2 second.
Solving this technical scheme of replying of overtaking other vehicles is:
Also include in device of the present utility model and allow the answering system of overtaking other vehicles, it comprises:
Allow to overtake other vehicles and reply switch (91)
Allow to overtake other vehicles and reply timing circuit (10), its input end is connected in to allow to overtake other vehicles replys the mouth of switch (91);
The answering equipment electric-controlled switch (12) that allows to overtake other vehicles, its input control end be connected in allow to overtake other vehicles should the mouth of timing circuit (10) on; The other end of replying switch (91) of allowing to overtake other vehicles is connected on the evoked potential of timing circuit (10) that allow to overtake other vehicles;
Allow to overtake other vehicles and reply source of early warning (73), its input end is connected on the mouth of answering equipment electric-controlled switch (12) that allow to overtake other vehicles;
When front truck is agreed the request of overtaking other vehicles of back car, clicking allows to overtake other vehicles replys switch (91), allow to overtake other vehicles and reply timing circuit (10) and be triggered and enter the early warning definition status, the closed conducting of answering equipment electric-controlled switch (12) that allows to overtake other vehicles, it makes to allow to overtake other vehicles in the timer-operated time of early warning and replys source of early warning (73) and send and allow the early warning signal of overtaking other vehicles; When front truck is disagreed with the request of overtaking other vehicles of back car, click safety distance warning switch (8), the closed conducting of source of early warning electric-controlled switch (6), control source of early warning 7 sends the brake early warning signal in the timer-operated time of early warning, allow the back car slow down and keep a safe distance.
But as another embodiment, of the present utility model overtake other vehicles to reply also can adopt following technical scheme:
Device of the present utility model also includes the answering system of overtaking other vehicles, and it comprises:
Allow to overtake other vehicles and reply switch (91);
Allow to overtake other vehicles and reply timing circuit (10), its input end is connected in to allow to overtake other vehicles replys the mouth of switch (91); The other end of replying switch (91) of allowing to overtake other vehicles is connected on the evoked potential of timing circuit (10) that allow to overtake other vehicles;
The answering equipment electric-controlled switch (12) that allows to overtake other vehicles, its input control end be connected in allow to overtake other vehicles should the mouth of timing circuit (10) on;
Allow to overtake other vehicles and reply source of early warning (73), its input end is connected on the mouth of answering equipment electric-controlled switch (12) that allow to overtake other vehicles;
Mustn't overtake other vehicles and reply switch (92);
Mustn't overtake other vehicles and reply timing circuit (11), its input end is connected in to overtake other vehicles replys the mouth of switch (92);
The answering equipment electric-controlled switch (13) of mustn't overtaking other vehicles, its input control end be connected in do not allow to overtake other vehicles should the mouth of timing circuit (11) on; Its mouth is connected in the input end of urgent early warning signal equipment (72);
When front truck is agreed the request of overtaking other vehicles of back car, clicking allows to overtake other vehicles replys switch (91), allow to overtake other vehicles and reply timing circuit (10) and be triggered and enter the early warning definition status, the closed conducting of answering equipment electric-controlled switch (12) that allows to overtake other vehicles, it makes to allow to overtake other vehicles in the timer-operated time of early warning and replys source of early warning (73) and send and allow the early warning signal of overtaking other vehicles; When front truck is disagreed with the request of overtaking other vehicles of back car, clicking to overtake other vehicles replys switch (92), mustn't overtake other vehicles and reply timing circuit (11) and be triggered and enter the early warning definition status, the closed conducting of answering equipment electric-controlled switch (13) of mustn't overtaking other vehicles, it makes urgent early warning signal equipment (72) send not allow the early warning signal of overtaking other vehicles in the timer-operated time of early warning; Allowing the back car slow down keeps a safe distance.
4, how backward about the car driver provides the information problem of front truck deceleration urgency level
The utility model adopts two-stage brake early warning: the one, and the foresight brake, it is the non-emergent brake after slowly slowing down through a section.Only light the original stoplight stop lamp of vehicle this moment; The 2nd, emergency brake, it is promptly to subtract the and then brake under a kind of non-foresight dangerous situation of emergency brake of oil.At this moment, prior-warning device can " in advance " be lighted stoplight stop lamp, and promptly the driver is at the beginning of promptly subtracting oil, and pin is not also stepped on before the brake pedal, and prior-warning device is just lighted stoplight stop lamp car early warning backward in advance automatically in advance; Not only light stoplight stop lamp in advance but also light a red flicker signal that is installed in the front truck afterbody simultaneously, further remind the back car, brake this time belongs to emergency brake.
It can be realized with following technical scheme:
Described one group of source of early warning electric-controlled switch (6) comprises two electric-controlled switch (MS61 at least, MS62), their input control end all is connected on the mouth of early warning timing circuit, in parallel on one of them electric-controlled switch (MS61) electrical equipment with foot brake switch (02), can control brake source of early warning (71), the mouth of another electric-controlled switch (MS62) is connected on the urgent early warning signal equipment (72), when early warning timing circuit (5) is in the early warning definition status, its output voltage is controlled two electric-controlled switch (MS61, MS62) equal closed conducting, brake source of early warning (71) sends signal simultaneously with urgent early warning signal equipment (72), constitutes the emergency brake signal.
The utility model has the advantages that:
(1), more comprehensively considered several principal elements of knocking into the back, the corresponding anti-technical scheme that knocks into the back that is provided is effective, and simple and direct practicality has embodied on each stage of rear-end collision development and set up defenses in depth.
(2) safety distance warning function provides a kind of means that the back car keeps a safe distance of supervising for the front truck driver, and this also is means of defending the own security of the lives and property.Because back car too near front truck, is a kind of danger to back car oneself not only, and the safety of front truck is constituted a threat to.Front truck has the right to sound a warning, and the back car is kept a safe distance.So these slight technical measures of safety distance warning function join hundreds of millions of drivers and correct in the safety distance ranks violating the regulations, have played the effect that traffic constable did not have.Be the effective ways that solve " safety distance, laws are not fully observed " world-famous puzzle.
(3), the emergency brake early warning is effective, because this prior-warning device is from the throttle sensor sampling, so it is all more leading than the early warning signal that the method for other measurement of vehicle speed obtains.
(4), cost is low, because this prior-warning device is used the throttle sensor and the original stoplight stop lamp of vehicle of fuel injection systems, needs the source of early warning that increases few, reduced the cost of system widely.
(5), on the vehicle of various fuel injection systemss, promote easily.Because no longer consider the installing space problem of sensor, can not bring any infringement to vehicle.So accepted by the car owner easily.
(6), improved the reliability that subtracts oily forewarn system greatly.Because this system self do not have movable parts, throttle sensor is the thoroughly tempered elaboration that comes out of fuel injection systems manufacturer again, and is therefore very reliability and durability.
Description of drawings
Fig. 1 the utlity model has the anti-prior-warning device block diagram that knocks into the back that subtracts oily warning function.
Fig. 2 is at the anti-prior-warning device block diagram that knocks into the back that increases on the basis that promptly subtracts oily warning function after function is distinguished in emergency brake and non-emergent brake.
The anti-prior-warning device block diagram that knocks into the back of Fig. 3 safety distance warning function on the basis that promptly subtracts oily warning function.
Anti-the knock into the back prior-warning device block diagram of Fig. 4 after increasing the answering of overtaking other vehicles again on the basis that promptly subtracts oily warning function and safety distance warning function and emergency brake and non-emergent brake differentiation function.
Fig. 5 the utility model another kind has the block diagram of the anti-prior-warning device that knocks into the back of the answering of overtaking other vehicles.
Fig. 6 the utlity model has the circuit diagram of the anti-prior-warning device that knocks into the back that promptly subtracts oily warning function.
Fig. 7 the utility model is at the anti-prior-warning device relative section circuit diagram that knocks into the back that increases on the basis that promptly subtracts oily warning function after function is distinguished in emergency brake and non-emergent brake.
Fig. 8 increases the circuit diagram that safety distance warning function and emergency brake and non-emergent brake are distinguished the relative section of function in promptly subtracting oily early warning circuit.
The overtake other vehicles circuit diagram of response part of Fig. 9 the utility model.
Figure 10 the utility model another kind has the relative section circuit diagram of the anti-prior-warning device that knocks into the back of the answering of overtaking other vehicles.
The specific embodiment
Further specify specific embodiments of the present utility model below in conjunction with Figure of description:
As Fig. 1 and shown in Figure 6, present embodiment provides a kind of prior-warning device that prevents rear-end collision, and this device has when promptly subtracting oil or emergency brake " in advance " and lights the stoplight stop lamp function of car early warning backward.This apparatus features is that it does not need for this prior-warning device sensor special and early warning signal equipment to be installed, it is the throttle sensor from the vehicle fuel injection systems, for example throttle position sensor or accelerator pedal sensor or airmoter, output voltage in obtain the early warning control signal by computational analysis; And utilize the original stoplight stop lamp of vehicle to send the signalling set of early warning as car backward.
As Fig. 1 and shown in Figure 6, comprise 7 parts among the figure of present embodiment; But as mentioned above, the stoplight stop lamp of the throttle position sensor of section 1 and ground the 7th part belongs to the original equipment of vehicle; Real just five parts of 2-6 that need provide by the utility model.Part 2 is a voltage follower, and its input end is connected on the voltage output end of fuel injection systems throttle sensor 1, directly obtains the driver and control the very early time information that throttle makes vehicle quicken or slow down from the output voltage of throttle sensor 1; The 3rd part is a voltage derivative circuit 3, and its input end is connected on the mouth of voltage follower 2, and the output voltage of voltage follower 2 is carried out the analog differentiation computing, and what detect the driver promptly subtracts speed oil; The 4th part is a voltage comparator 4, its input end is connected on the default threshold voltage, another input end is connected on the mouth of voltage derivative circuit 3, when the output voltage of voltage derivative circuit 3 made this terminal voltage of voltage comparator meet or exceed the default threshold voltage of the other end, the upset saltus step took place in the output voltage of voltage comparator 4; The 5th part is an early warning timing circuit 5, its input trigger end is connected on the mouth of voltage comparator 4, when the upset saltus step takes place the output voltage of voltage comparator 4, triggers early warning timing circuit 5, make it enter the early warning definition status, saltus step also takes place in its output voltage; The 6th part is one group of source of early warning electric-controlled switch 6, its input control end is connected on the mouth of early warning timing circuit 5, when early warning timing circuit 5 is in the early warning definition status, its output voltage control source of early warning electric-controlled switch 6 closed conductings make source of early warning 7 send brake early warning signal (stoplight stop lamp is lighted) in the timer-operated time of early warning.
In the present embodiment, voltage follower 2 resistance R21, the analog computing amplifier LM158 of R22 and called after IC23 constitutes, one of R21 terminates at the voltage output end of engine throttle position sensing device 1, this end of R21 is as the input end of voltage follower 2, the other end of R21 is connected on the normal phase input end 3 of IC23, R22 is connected across between the negative-phase input 2 and mouth 1 of IC23, the positive power source terminal 8 of IC23 is connected on by starting switch 01 on positive 12 volts of Vehicle Power, its negative power end 4 ground connection, the mouth 1 of IC23 is exactly the mouth of voltage follower 2.
Voltage derivative circuit 3 is to constitute with electric capacity C31 and resistance R 32, and the positive pole of C31 is connected on the mouth 1 of IC23, as the input end of differential circuit 3; Ground connection after its negative pole is connected with R32, the point of connection of C31 and R32 is the mouth of differential circuit 3.
Early warning timing circuit 5, be to use R51, R52, R56, R57 capacitor C 53, C55, the NE555 time-base integrated circuit of called after IC54, constitute with the NPN type aerotron of called after T58, the low triggering end 2 of IC54 is connected on the mouth 7 of IC43 as the input end of timing circuit 5, one end of resistance R 51 is connected on by starting switch 01 on positive 12 volts of Vehicle Power, the other end is connected on 2 ends of IC54, the end of R52 is connected on by starting switch 01 on positive 12 volts of Vehicle Power, ground connection after the other end is connected with the positive pole of capacitor C 53, the high-triggering end 6 of IC54 and discharge end 7 all are connected on the point of attachment of resistance R 51 and capacitor C 52 as timing element, the positive power source terminal 8 of IC54 and reset terminal 4 all are connected on positive 12 volts of Vehicle Power by starting switch 01, ground terminal 1 ground connection of IC54, its voltage controling end 5 is by capacitor C 54 ground connection, the mouth 3 of IC54 is connected on the base stage of T57 by R55, the grounded emitter of T57, its collecting electrode is connected on by R56 and starting switch 01 on positive 12 volts of Vehicle Power, and the output signal of 3 ends of IC54 is anti-phase through T57, at last from the collecting electrode output of T57.
Source of early warning electric-controlled switch 6, be the high-power semiconductor switch IRF9540 of a called after MS61, their grid G is the input control end, be connected on the collecting electrode of aerotron T57 in the early warning timing circuit 5, its source S is connected on 12 volts of the positive supplies of vehicle by starting switch 01, and their drain D is connected on the positive power source terminal of the original stoplight stop lamp 71 of vehicle, on electric, high-power semiconductor switch MS61 is in parallel with the foot brake switch of vehicle, and they can control stoplight stop lamp 71.
When normal vehicle operation or slowly subtract when oil slows down or foresight is slowly braked, prior-warning device can " in advance " not lighted stoplight stop lamp.
Have only when vehicle emergency subtracts oil or emergency brake, prior-warning device just can " in advance " be lighted stoplight stop lamp.Because when promptly subtracting oil, throttle position sensor 1 returning quickly reduces its output voltage fast; The mouth of voltage follower 2, i.e. the 1st end of IC23, output voltage also following fast and reducing; Make the mouth of differential circuit 3, promptly the moment negative voltage appears in the voltage on the point of connection of capacitor C 31 and resistance R 32; This negative voltage is applied to the normal phase input end of voltage comparator 4, be on the normal phase input end 5 of IC43, when the voltage on the normal phase input end 5 that makes IC43 after this negative voltage and the bias voltage Vr addition was negative voltage, voltage jumped to earth potential zero by+12 volts on the mouth 7 of IC43; This voltage negative saltus step has triggered early warning timing circuit 5, makes it enter the early warning definition status; At this moment, the voltage of the mouth 3 of IC54 is positive voltage, after process aerotron T58 is anti-phase, from negative voltage of collecting electrode output of T58; Stoplight stop lamp 71 is lighted in the closed conducting of this negative voltage control high-power semiconductor switch MS61.
Because the speed of response of electronic circuit is very fast, subtracts oil fast from the driver and begin only to need 1-2 millisecond to lighting stoplight stop lamp.So beyond running into during the dangerous situation emergency brake, when the pin that subtracts oil as the driver did not also leave Das Gaspedal, stoplight stop lamp was lighted automatically.Great number of statistic data shows, prior-warning device is lighted stoplight stop lamp and lighted stoplight stop lamp " in advance " 0.25-0.5 second than driver's pedal that touches on the brake.This meaning for the vehicle of running at high speed prevents to knock into the back is very big.For example the speed of a motor vehicle is per hour 120 kilometers, and the leading 0.25-0.5 of prior-warning device lights stoplight stop lamp second, makes back car driver shift to an earlier date 0.25-0.5 and brakes second, and this equals the safety distances of giving back car 8-16 rice more.When high vehicle speeds, because vehicle is very little to ground-surface adhesive ability, even differ 1 meter distance, when knocking into the back, as long as a car one collision, deflection just takes place in direction of traffic, rolls immediately when serious, or behind the run-off-road with adjacent lane on car more serious collision takes place again, cause serious consequence.So, the 0.25-0.5 second that this scorns to take even a glance at ordinary times, may swing with front and back passengers inside the car's life and death this moment and close.
In the present embodiment, described throttle sensor 1 can be throttle position sensor or the electricity-controlling throttle pedal sensor or the airmoter of fuel injection systems.
The basic structure of present embodiment is identical with embodiment 1, does not repeat them here.
As Fig. 2, shown in Figure 7, the difference of present embodiment and embodiment 1 is, in the present embodiment, described one group of source of early warning electric-controlled switch 6 comprises two electric-controlled switch MS61 at least, MS62, one of them electric-controlled switch MS61 is electric upward in parallel with foot brake switch 02, can control brake source of early warning 71, the mouth of another electric-controlled switch MS62 is connected on the urgent early warning signal equipment 72, when early warning timing circuit 5 is in the early warning definition status, its output voltage is controlled two electric-controlled switch MS61, the equal closed conducting of MS62, brake source of early warning 71 sends signal simultaneously with urgent early warning signal equipment 72, constitutes the emergency brake signal.
In the present embodiment, described brake source of early warning 71 can be made of the original stoplight stop lamp of vehicle, and emergency signal source of early warning 72 can be red flicker signal.The grid G of MS62 also is connected on the collecting electrode of aerotron T58, its source S also be by starting switch 01 be connected on+12 volts on, its drain D is connected on the positive power source terminal of red flicker signal.Like this, when non-emergent brake, because source of early warning electric-controlled switch 6 is not closed, so lighted by the stoplight stop lamp of foot brake switch 02 control.When emergency brake, because the driver MS61 in the source of early warning electric-controlled switch 6 and MS62 before not stepping on the foot brake pedal make stoplight stop lamp and red flicker signal " in advance " light the light representation emergency brake that this group is eye-catching with regard to auto-closing.Present embodiment is on the basis of embodiment 1, by the emergency brake signal emergency brake and non-emergent brake have been carried out very significantly distinguishing, back car driver can have understanding more clearly to the brake emergency state of front truck, and he can take comparatively appropriate brake measure to avoid the generation of rear-end collision.
The basic structure of present embodiment can be identical with embodiment 1 or embodiment 2, do not repeat them here.
As Fig. 3 and shown in Figure 8, the difference of present embodiment and embodiment 1 and embodiment 2 is, in the present embodiment, this device not only has when promptly subtracting oil or emergency brake " in advance " and lights the function of brake; And, also have the safety distance warning function, promptly when the front truck driver found that the back car is too close, car gave a warning backward, and its deceleration is kept a safe distance; And the function of distinguishing emergency brake and non-emergent brake.
The realization of present embodiment safety distance warning function is on the basis of embodiment 1 or embodiment 2, and one of a safety distance warning switch 8 is terminated on the input trigger end of early warning timing circuit 5, and the other end is connected on the triggering CONTROLLED POTENTIAL of timing circuit 5; When safety distance warning switch 8 closures, early warning timing circuit 5 is triggered and enters the early warning definition status, makes the 6 closed conductings of source of early warning electric-controlled switch, and the control source of early warning sends the brake early warning signal.
On the basis of embodiment 2, increase the situation that safety distance is warned switch 8 as Fig. 3 with Figure 7 shows that, when the back car too when the front truck, can not subtract under the oily condition of not braking, press safety distance warning switch 8, early warning timing circuit 5 is triggered and enters the early warning definition status, make the equal closed conducting of two electric-controlled switch MS61, MS62 in the source of early warning electric-controlled switch 6, stoplight stop lamp and red flicker signal " in advance " are lighted, constitute the safety distance early warning signal.
As another embodiment of present embodiment, also can on the basis of embodiment 1, increase safety distance warning switch 8, not shown.Itself and first kind of mode difference are, has only an electric-controlled switch MS61 in the source of early warning electric-controlled switch 6, when pressing control stoplight stop lamp safety distance warning switch 8, early warning timing circuit 5 is triggered and enters the early warning definition status, make the closed conducting of electric-controlled switch MS6 in the source of early warning electric-controlled switch 6, stoplight stop lamp is lighted, constituted the safety distance early warning signal.
As Fig. 3 and shown in Figure 8, safety distance warning switch 8 is made of diode D81 and hand switch 82.One of switch 82 terminates on the input trigger end 2 of early warning timing circuit 5, promptly on the low pressure trigger end 2 of IC54, and other end ground connection.The positive pole of diode D81 also is connected on 2 ends of IC54, and its negative pole is connected on the mouth of voltage comparator 4, i.e. the 7th end of IC43, the effect of diode D81 is a voltage isolation, when preventing switch 82 closures, the high potential and the ground short circuit of the 7th end of IC43 cause IC43 to damage.
When the front truck driver will implement the safety distance warning to back car driver, closure is switch 82 once, make early warning timing circuit 5 enter the early warning definition status, the output voltage control electric-controlled switch MS61 and the MS62 closure of T58 collecting electrode are lighted stoplight stop lamp 71 and red flicker signal 72.
The safety distance warning function, though be a slight technological improvement measure, still, its effect is very huge, it can make hundreds of millions of drivers join and correct in the safety distance ranks violating the regulations, played the effect that millions upon millions of traffic constable did not have.Be the effective ways of a solution " safety distance, laws are not fully observed " world-famous puzzle.
As Fig. 4 and shown in Figure 9, present embodiment provides a kind of prior-warning device that prevents rear-end collision, and this device not only has when promptly subtracting oil or emergency brake " in advance " and lights the function of brake; The safety distance warning function; With the function of distinguishing emergency brake and non-emergent brake.And, also have the answering of overtaking other vehicles, promptly when the back car when the front truck request is overtaken other vehicles, whether front truck can give to reply clearly, allow to overtake other vehicles.
The overtake other vehicles realization of answering of present embodiment is on the basis of embodiment 3, increases by one and allows the answering system of overtaking other vehicles, and it comprises:
Allow to overtake other vehicles and reply timing circuit 10, its input end is connected in to allow to overtake other vehicles replys the mouth of switch 91;
The answering equipment electric-controlled switch 12 that allows to overtake other vehicles, its input control end be connected in allow to overtake other vehicles should the mouth of timing circuit 10 on;
Allow to overtake other vehicles and reply source of early warning 73, its input end is connected on the mouth of the answering equipment electric-controlled switch 12 that allows to overtake other vehicles.
And do not allow the answering of overtaking other vehicles, then can replace implementing with the safety distance warning function.
Further, this allows to overtake other vehicles and replys source of early warning 73 and can be the flashed green signal lamp.
As Fig. 4 and shown in Figure 9, allowing to overtake other vehicles, to reply switch 91 be to be made of a hand switch; Replying timing circuit 10 is by resistance R 101, R102, and R106, capacitor C 103, the time-base integrated circuit NE555 of a C105 and a called after IC104 forms.It is that a high level triggers, the univibrator of low level output, and the 6th end of IC104 is its high level trigger end, the 7th end of IC104 is its low level mouth; Reply one of switch 91 and terminate on the high level trigger end 6 of IC104, the other end is connected on by starting switch 01 on positive 12 volts of vehicle accumulator; Answering equipment electric-controlled switch 12 is that the high-power semiconductor switch IRF9540 by a called after MS121 constitutes, its grid G is connected on the low level mouth 7 of IC104, its source S is connected on by starting switch 01 on positive 12 volts of Vehicle Power, its drain D is connected on the positive power source terminal of flashed green signal lamp 73, the negative power end ground connection of flashed green signal lamp 73.
When the front truck driver allows the back car when overtaking other vehicles, as long as click switch 91, trigger and reply timing circuit 10 and enter and reply definition status, the low level of its output makes the closed conducting of the high-power semiconductor switch of MS121, flashed green signal lamp 73 send signal after electric.
When the front truck driver does not allow the back car to overtake other vehicles, as long as click safety distance warning switch 82, light stoplight stop lamp 71 and red flicker signal 72, allow the back car note keeping a safe distance, temporarily do not overtake other vehicles.
The overtake other vehicles foundation of answering system, car is communicated with each other and harmonious before and after having strengthened, and can overcome the phenomenon of blindly overtaking other vehicles.This eliminates in bud just the danger that rear-end collision takes place.
The structure of present embodiment and embodiment 4 is basic identical, or else repeats no more.
As Fig. 5, shown in Figure 10, the difference of present embodiment and embodiment 4 is, is in the present embodiment to realize the answering of overtaking other vehicles by the answering system of overtaking other vehicles that increases newly, and itself and safety distance warning function are independent separately.This answering system of overtaking other vehicles comprises:
Allow to overtake other vehicles and reply switch 91;
Allow to overtake other vehicles and reply timing circuit 10, its input end is connected in to allow to overtake other vehicles replys the mouth of switch 91;
The answering equipment electric-controlled switch 12 that allows to overtake other vehicles, its input control end be connected in allow to overtake other vehicles should the mouth of timing circuit 10 on;
Allow to overtake other vehicles and reply source of early warning 73, its input end is connected on the mouth of the answering equipment electric-controlled switch 12 that allows to overtake other vehicles;
Mustn't overtake other vehicles and reply switch 92;
Mustn't overtake other vehicles and reply timing circuit 11, its input end is connected in to overtake other vehicles replys the mouth of switch 92;
The answering equipment electric-controlled switch 13 of mustn't overtaking other vehicles, its input control end be connected in do not allow to overtake other vehicles should the mouth of timing circuit 11 on; Its mouth is connected in the input end of urgent early warning signal equipment 72.
When front truck is agreed the request of overtaking other vehicles of back car, clicking allows to overtake other vehicles replys switch 91, allow to overtake other vehicles and reply timing circuit 10 and be triggered and enter the early warning definition status, the answering equipment electric-controlled switch 12 closed conductings that allow to overtake other vehicles, it makes to allow to overtake other vehicles in the timer-operated time of early warning and replys source of early warning 73 and send and allow the early warning signal of overtaking other vehicles; When front truck is disagreed with the request of overtaking other vehicles of back car, clicking to overtake other vehicles replys switch 92, mustn't overtake other vehicles and reply timing circuit 11 and be triggered and enter the early warning definition status, the answering equipment electric-controlled switch 13 closed conductings of mustn't overtaking other vehicles, it makes urgent early warning signal equipment 72 send not allow the early warning signal of overtaking other vehicles in the timer-operated time of early warning; Allowing the back car slow down keeps a safe distance.
The foregoing description is several specific embodiment of the present utility model, only is used to illustrate the utility model, but not is used to limit the utility model.
Claims (10)
1, a kind of prior-warning device that prevents rear-end collision is characterized in that, this device comprises:
A voltage follower (2), its input end are connected on the voltage output end of the throttle sensor (1) of electric control fuel oil jet system, directly obtain the driver and control the very early time information that throttle makes vehicle quicken or slow down from the output voltage of throttle sensor (1);
A voltage derivative circuit (3), its input end is connected on the mouth of voltage follower (2), and the output voltage of voltage follower (2) is carried out the analog differentiation computing, and what detect the driver promptly subtracts speed oil;
A voltage comparator (4), one of them input end is connected on the default threshold voltage, another input end is connected on the mouth of voltage derivative circuit (3), when the output voltage of voltage derivative circuit (3) made this terminal voltage of voltage comparator (4) meet or exceed the default threshold voltage of the other end, the upset saltus step took place in the output voltage of voltage comparator (4);
An early warning timing circuit (5), its input trigger end is connected on the mouth of voltage comparator (4), when the upset saltus step takes place the output voltage of voltage comparator (4), triggers early warning timing circuit (5), make it enter the early warning definition status, its output voltage generation saltus step;
One group of source of early warning electric-controlled switch (6), its input control end is connected on the mouth of early warning timing circuit (5), its mouth is connected in a source of early warning (7), when early warning timing circuit (5) is in the early warning definition status, its the closed conducting of output voltage control source of early warning electric-controlled switch (6), source of early warning (7) sends the brake early warning signal in the timer-operated time of early warning.
2, a kind of prior-warning device that prevents rear-end collision as claimed in claim 1, it is characterized in that, described one group of source of early warning electric-controlled switch (6) comprises two electric-controlled switch (MS61 at least, MS62), in parallel on one of them electric-controlled switch (MS61) electrical equipment with foot brake switch (02), can control brake source of early warning (71), the mouth of another electric-controlled switch (MS62) is connected on the urgent early warning signal equipment (72), when early warning timing circuit (5) is in the early warning definition status, its output voltage is controlled two electric-controlled switch (MS61, MS62) equal closed conducting, brake source of early warning (71) sends signal simultaneously with urgent early warning signal equipment (72), constitutes the emergency brake signal.
3, a kind of prior-warning device that prevents rear-end collision as claimed in claim 1 or 2, it is characterized in that, also comprise a safety distance warning switch (8) in this device, its mouth is connected on the input trigger end of early warning timing circuit (5), when the back car too when the front truck, can not subtract under the oily condition of not braking, warn switch (8) to trigger early warning timing circuit (5) with safety distance and enter the early warning definition status, make the closed conducting of source of early warning electric-controlled switch (6), control source of early warning (7) sends the brake early warning signal in the timer-operated time of early warning, allow the back car slow down and keep a safe distance.
4, a kind of prior-warning device that prevents rear-end collision as claimed in claim 3 is characterized in that, also include in this device to allow the answering system of overtaking other vehicles, comprising:
Allow to overtake other vehicles and reply switch (91);
Allow to overtake other vehicles and reply timing circuit (10), its input end is connected in to allow to overtake other vehicles replys the mouth of switch (91); The other end of replying switch (91) of allowing to overtake other vehicles is connected on the evoked potential of timing circuit (10) that allow to overtake other vehicles;
The answering equipment electric-controlled switch (12) that allows to overtake other vehicles, its input control end be connected in allow to overtake other vehicles should the mouth of timing circuit (10) on;
Allow to overtake other vehicles and reply source of early warning (73), its input end is connected on the mouth of answering equipment electric-controlled switch (12) that allow to overtake other vehicles;
When front truck is agreed the request of overtaking other vehicles of back car, clicking allows to overtake other vehicles replys switch (91), allow to overtake other vehicles and reply timing circuit (10) and be triggered and enter the early warning definition status, the closed conducting of answering equipment electric-controlled switch (12) that allows to overtake other vehicles, it makes to allow to overtake other vehicles in the timer-operated time of early warning and replys source of early warning (73) and send and allow the early warning signal of overtaking other vehicles; When front truck is disagreed with the request of overtaking other vehicles of back car, click safety distance warning switch (8), trigger early warning timing circuit (5), make the closed conducting of source of early warning electric-controlled switch (6), control source of early warning (7) sends the brake early warning signal in the timer-operated time of early warning, allow the back car slow down and keep a safe distance.
5, a kind of prior-warning device that prevents rear-end collision as claimed in claim 2 is characterized in that, this device also includes the answering system of overtaking other vehicles, and it comprises:
Allow to overtake other vehicles and reply switch (91);
Allow to overtake other vehicles and reply timing circuit (10), its input end is connected in to allow to overtake other vehicles replys the mouth of switch (91); The other end of replying switch (91) of allowing to overtake other vehicles is connected on the evoked potential of timing circuit (10) that allow to overtake other vehicles;
The answering equipment electric-controlled switch (12) that allows to overtake other vehicles, its input control end be connected in allow to overtake other vehicles should the mouth of timing circuit (10) on;
Allow to overtake other vehicles and reply source of early warning (73), its input end is connected on the mouth of answering equipment electric-controlled switch (12) that allow to overtake other vehicles;
Mustn't overtake other vehicles and reply switch (92);
Mustn't overtake other vehicles and reply timing circuit (11), its input end is connected in to overtake other vehicles replys the mouth of switch (92);
The answering equipment electric-controlled switch (13) of mustn't overtaking other vehicles, its input control end be connected in do not allow to overtake other vehicles should the mouth of timing circuit (11) on; Its mouth is connected in the input end of urgent early warning signal equipment (72);
When front truck is agreed the request of overtaking other vehicles of back car, clicking allows to overtake other vehicles replys switch (91), allow to overtake other vehicles and reply timing circuit (10) and be triggered and enter the early warning definition status, the closed conducting of answering equipment electric-controlled switch (12) that allows to overtake other vehicles, it makes to allow to overtake other vehicles in the timer-operated time of early warning and replys source of early warning (73) and send and allow the early warning signal of overtaking other vehicles; When front truck is disagreed with the request of overtaking other vehicles of back car, clicking to overtake other vehicles replys switch (92), mustn't overtake other vehicles and reply timing circuit (11) and be triggered and enter the early warning definition status, the closed conducting of answering equipment electric-controlled switch (13) of mustn't overtaking other vehicles, it makes urgent early warning signal equipment (72) send not allow the early warning signal of overtaking other vehicles in the timer-operated time of early warning; Allowing the back car slow down keeps a safe distance.
6, a kind of prior-warning device that prevents rear-end collision as claimed in claim 1 is characterized in that, described throttle sensor (1) can be throttle position sensor or the electricity-controlling throttle pedal sensor or the airmoter of fuel injection systems.
7, a kind of prior-warning device that prevents rear-end collision as claimed in claim 1 is characterized in that, described source of early warning 7 is one group of original stoplight stop lamp of the vehicle that is subjected to foot brake to open control (71).
8, a kind of prior-warning device that prevents rear-end collision as claimed in claim 2 is characterized in that, described brake source of early warning (71) can be made of the original stoplight stop lamp of vehicle, and emergency signal source of early warning (72) can be red flicker signal.
9, a kind of prior-warning device that prevents rear-end collision as claimed in claim 4 is characterized in that, described overtaking other vehicles replied source of early warning (73) and be can be the flashed green signal lamp.
10, a kind of prior-warning device that prevents rear-end collision as claimed in claim 1, it is characterized in that, the negative-phase input of described voltage comparator (4) passes through resistance eutral grounding, default threshold voltage is zero, and at the voltage comparator normal phase input end, be that signal input part is provided with a bias voltage, when the output voltage of differential circuit and bias voltage sum less than zero the time, the upset saltus step takes place in the output voltage of voltage comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03261189.7U CN2664958Y (en) | 2002-08-19 | 2003-08-19 | Early warning device for preventing car-following |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2002/000575 WO2004016463A1 (en) | 2002-08-19 | 2002-08-19 | A prevention method-system against vehicle chase-collision |
| CNPCT/CN02/00575 | 2002-08-19 | ||
| CN03261189.7U CN2664958Y (en) | 2002-08-19 | 2003-08-19 | Early warning device for preventing car-following |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2664958Y true CN2664958Y (en) | 2004-12-22 |
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ID=34378593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN03261189.7U Expired - Fee Related CN2664958Y (en) | 2002-08-19 | 2003-08-19 | Early warning device for preventing car-following |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2664958Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105070077A (en) * | 2015-07-27 | 2015-11-18 | 福建工程学院 | Evidence-obtaining and cautioning methods/systems of illegal bus lane occupation |
| CN107111952A (en) * | 2014-11-18 | 2017-08-29 | 罗伯特·博世有限公司 | The track accessory system of close vehicle in response to being exceedingly fast |
-
2003
- 2003-08-19 CN CN03261189.7U patent/CN2664958Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107111952A (en) * | 2014-11-18 | 2017-08-29 | 罗伯特·博世有限公司 | The track accessory system of close vehicle in response to being exceedingly fast |
| CN107111952B (en) * | 2014-11-18 | 2020-06-05 | 罗伯特·博世有限公司 | Lane assist system responsive to extremely fast approaching vehicles |
| CN105070077A (en) * | 2015-07-27 | 2015-11-18 | 福建工程学院 | Evidence-obtaining and cautioning methods/systems of illegal bus lane occupation |
| CN105070077B (en) * | 2015-07-27 | 2017-12-08 | 福建工程学院 | A kind of evidence obtaining, alarming method for power and its system violating the regulations for taking bus zone |
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