CN104401252A - Automatic alarm system and method for preventing automobile rear-end collision - Google Patents
Automatic alarm system and method for preventing automobile rear-end collision Download PDFInfo
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- CN104401252A CN104401252A CN201410604145.2A CN201410604145A CN104401252A CN 104401252 A CN104401252 A CN 104401252A CN 201410604145 A CN201410604145 A CN 201410604145A CN 104401252 A CN104401252 A CN 104401252A
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- time cycle
- slope
- end collision
- car
- brake lamp
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Abstract
The invention relates to the field of active vehicle safety, in particular to an automatic alarm method for preventing automobile rear-end collision. The method comprises the following steps of acquiring traveling speed Vn in an n-th time period and traveling speed V(n+1) in an (n+1)-th time period; comparing (V(n+1)-Vn)/delta t with preset slope X to further judge whether a vehicle rear-end collision possibility exists; when the vehicle rear-end collision possibility exists, triggering a brake lamp to give an alarm. The defects in the prior art are overcome; based on an important factor of causing the vehicle rear-end collision, namely relative speed, the accelerator control state of a user is dynamically detected; once the user releases an accelerator, the alarm system can sense that a vehicle decelerates; when the deceleration amplitude reaches alarm conditions, the brake lamp is triggered to given the alarm, a following vehicle is promoted to keep safe traveling distance, and certain response time is provided for the following vehicle, so that the vehicle rear-end collision is effectively prevented, and the traveling safety is improved.
Description
Technical field
The present invention relates to vehicle active safety field, particularly relate to a kind of automobile anti-rear end collision alerting automatic telling status and method.
Background technology
In vehicle travel process, when needs stop or slow down, be first unclamp Das Gaspedal, then depress brake pedal, when brake pedal depresses, the brake lamp of the tailstock will light, remind vehicle below to notice that front truck touches on the brake, prevent with this accident generations such as knocking into the back.But in actual process of driving, the regular hour is needed to depressing brake pedal from unclamping Das Gaspedal, simultaneously, part chaufeur is unclear to front road conditions or when having other situation, capital accelerator releasing when not stepping on brake pedal slides, and slows down after observing to determine whether brake or continue to move ahead again.When front truck does not step on brake pedal unclamping Das Gaspedal, vehicle can slow down gradually.Now rear car do not know that front truck will slow down, rear car still can be advanced with original speed, and the measure such as just take when feeling that the distance of two cars becomes near by rule of thumb to touch on the brake, detour is to avoid causing the generation of accidents such as knocking into the back.At speed, when safety distance is comparatively little, the experience that travels is slightly poor, by the time rear car see front truck brake lamp bright or very near with leading vehicle distance time, the measure such as just only take emergency brake, detour just can avoid causing the generation of accidents such as knocking into the back.In practice, be all because rear car does not find that front truck slows down in a lot of situation, time very near with leading vehicle distance, trick is acted hurriedly in a messy situation and is had little time braking and dodge and lead to a disaster.Therefore, if rear car can know front truck in time, accelerator releasing is by slowing down, and rear car also just can be slowed down by accelerator releasing in time, avoids causing brake facing wearing and tearing too much with closely just tracking tramping sudden stop, and saves oil plant, particularly greatly can prevent the generation of accidents such as knocking into the back.
Summary of the invention
For overcoming the deficiencies in the prior art, the present invention seeks to: provide a kind of warning in advance to slow down, ensure the automobile anti-rear end collision automatic alarm method of traffic safety.Comprise the following steps,
Step one: after vehicle start, gathers the road speed V of n-th (n>=1) individual time cycle
nwith the road speed V of (n+1)th time cycle
n+1, the difference between (n+1)th time cycle and the n-th time cycle is Δ t;
Step 2: judge V
n+1value whether be 0; If V
n+1=0, then judge that vehicle stops row, terminates computing; If V
n+1≠ 0, then perform step 3;
Step 3: will
compare with the slope X (X < 0) preset, if
then judge there is not car rear-end possibility, vehicle brake lamp is not reported to the police, and returns step one;
If
then it is determined that the presence of car rear-end possibility, vehicle brake lamp sends alarm, and returns step one.
Further, after vehicle start-up, starting before, the value of setup times cycle Δ t and the value of slope X.The value of described time cycle Δ t is: 10
-6s≤Δ t≤2s.The value of described slope X is :-100≤X < 0.
Particularly, described alarm is that brake lamp is long bright.
Correspondingly, present invention also offers a kind of automobile anti-rear end collision alerting automatic telling status, this system comprises speed acquisition module, data conditioning circuit, car-mounted computer, brake lamp controller and vehicle brake lamp;
Described speed acquisition module, for after vehicle start, gathers the road speed V of the n-th time cycle Δ t
nwith the road speed V of (n+1)th time cycle
n+1, and the data of collection are sent to data conditioning circuit;
Described data conditioning circuit, revises for the data sent speed acquisition module, and revised data is sent to car-mounted computer;
Described car-mounted computer, for carrying out calculation process to the data received, comprising:
Judge V
n+1value whether be 0; If V
n+1=0, then judge that vehicle stops row, terminates computing;
If V
n+1≠ 0, then will
compare with the slope X (X < 0) preset, if
then judge there is not car rear-end possibility, if
then it is determined that the presence of car rear-end possibility, and send alerting signal to brake lamp controller;
Described brake lamp controller, for receiving the alarm command of car-mounted computer and controlling vehicle brake lamp warning.
Further, this system also comprises sensitivity and arranges module, and described sensitivity arranges module and is connected with car-mounted computer, for the scope of setup times cycle Δ t and the scope of slope X.Particularly, described sensitivity arranges module and comprises time cycle setting unit, time cycle memory cell, slope setting unit and slope memory cell, described time cycle setting unit is for user's manual setup times cycle, the time cycle value that the time cycle value of described time cycle cell stores system default and user are manually arranged, described slope setting unit manually arranges slope, the slope that the slope of described slope cell stores system default and user are manually arranged for user.
Further, this system also comprises power module, and described power module is connected with brake lamp controller, for providing power supply for brake lamp controller,
Further, this system also comprises time module, described time module is connected with car-mounted computer with speed acquisition module respectively, the time cycle value arranging module acquisition from sensitivity is sent to time module by described car-mounted computer, and time module triggers speed acquisition module acquires road speed according to described time cycle value.
Due to technique scheme, the present invention has following beneficial effect:
(1) the present invention makes up the deficiency that existing technology exists, from the key factor and the relative velocity that cause vehicle rear-end collision, detection of dynamic user is to the state of a control of throttle, once user pine throttle, warning can sense car retardation, after deceleration amplitude reaches alert if, triggering brake lamp is reported to the police, and prompting rear car keeps safe space between motorcars, gives the reaction time that rear car is certain, effectively pre-anti-car rear-end, improves travel safety.
(2), in the present invention, by the setting of time cycle and slope, the sensitivity of warning can be controlled, namely time periodic quantity and slope value less, then warning is sensitiveer.Meanwhile, time cycle and slope value can set according to user's request, add alerting ability and the comformability of system.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the diagram of circuit of automobile anti-rear end collision automatic alarm method of the present invention;
Fig. 2 is the block diagram of automobile anti-rear end collision alerting automatic telling status of the present invention;
Fig. 3 is the slope schematic diagram of the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, all belongs to the scope of protection of the invention.
Fig. 1 is the diagram of circuit of automobile anti-rear end collision automatic alarm method of the present invention, and as seen from the figure, automobile anti-rear end collision automatic alarm method of the present invention comprises:
Step one: after vehicle start-up, starting before, the value of setup times cycle Δ t and the value of slope X; The value of time cycle Δ t and the value of slope X can be the values that system default value or user manually set, and the system default value of Δ t is 10
-6s≤Δ t≤2s, the valid value range of the Δ t of user's setting is 10
-6the system default value of s ~ 2s, slope X is-100≤X < 0, and the valid value range of the X that user sets is as-100≤X < 0.When the time cycle, Δ t was constant, slope X value less, then speed decline more obvious, the car rear-end risk of existence is larger.
Step 2: after vehicle start, gathers the road speed V of n-th (n>=0) individual time cycle
nwith the road speed V of (n+1)th time cycle
n+1, the difference between (n+1)th time cycle and the n-th time cycle is Δ t;
Step 3: judge V
n+1value whether be 0; If V
n+1=0, then judge that vehicle stops row, terminates computing; If V
n+1≠ 0, then perform step 4;
Step 4: will
compare with the slope X (X < 0) preset,
If
then judge there is not car rear-end possibility, vehicle brake lamp is not reported to the police, and returns step 2;
If
then it is determined that the presence of car rear-end possibility, vehicle brake lamp sends alarm, and returns step 2, enters next logic loops.
Particularly, it is long bright that described car alarming prompts for brake lamp, and after entering next logic loops according to said method, when result of determination is not for existing car rear-end possibility, vehicle brake lamp extinguishes.
Correspondingly, present invention also offers the automobile anti-rear end collision alerting automatic telling status that a kind of and above-mentioned automobile anti-rear end collision automatic alarm method is corresponding, see Fig. 2, this system comprises sensitivity and arranges module, time module, speed acquisition module, data conditioning circuit, car-mounted computer, brake lamp controller, vehicle brake lamp and power module;
Described sensitivity arranges module and is connected with car-mounted computer, for the scope of setup times cycle Δ t and the scope of slope X.Particularly, described sensitivity arranges module and comprises time cycle setting unit, time cycle memory cell, slope setting unit and slope memory cell, described time cycle setting unit is for user's manual setup times cycle, the time cycle value that the time cycle value of described time cycle cell stores system default and user are manually arranged, described slope setting unit manually arranges slope, the slope that the slope of described slope cell stores system default and user are manually arranged for user.
Described car-mounted computer, for arranging the value of module acquisition time cycle Δ t from sensitivity, and sends to time module by the time cycle value Δ t of acquisition, and described time module triggers speed acquisition module acquires road speed according to time cycle value Δ t.If user sets time cycle value and slope value after vehicle start-up, then car-mounted computer preferentially calls described setting value, if user's non-setting-up time periodic quantity and slope value after vehicle start-up, then the time cycle of calling system acquiescence is worth and slope value; Certainly, user also can give store time cycle value and slope value assigned priority other.
Described speed acquisition module, for after vehicle start, Negotiation speed sensor gathers the road speed V of the n-th time cycle
nwith the road speed V of (n+1)th time cycle
n+1(difference between (n+1)th time cycle and the n-th time cycle is Δ t), and the data of collection are sent to data conditioning circuit.
Described data conditioning circuit, revises for the data sent speed acquisition module, and revised data is sent to car-mounted computer;
Described car-mounted computer arranges module from sensitivity and obtains the value of cycle Δ t and the value of slope X, and carries out calculation process to the data received, and comprising:
Judge V
n+1value whether be 0; If V
n+1=0, then judge that vehicle stops row, terminates computing;
If V
n+1≠ 0, then will
compare with the slope X (X < 0) preset, if
then judge there is not car rear-end possibility, if
then it is determined that the presence of car rear-end possibility, and send alerting signal to brake lamp controller;
Described brake lamp controller is connected with power module, and for receiving the alarm command of car-mounted computer and controlling vehicle brake lamp warning, described type of alarm is that brake lamp is long bright, until when result of determination is not for existing car rear-end possibility, vehicle brake lamp extinguishes.
Embodiment: see Fig. 3, after vehicle launch, user inputs setting value Δ t=1s, X=-20, and after vehicle start, speed sensor gathers the road speed V of first time cycle
1=110km/h, gathers the road speed V of second time cycle
2=80km/h, as calculated
car-mounted computer it is determined that the presence of car rear-end possibility, and then sends alerting signal to brake lamp controller, and vehicle brake lamp lights, and keeps safe space between motorcars after prompting.
The present invention makes up the deficiency that existing technology exists, from the key factor and the relative velocity that cause vehicle rear-end collision, detection of dynamic user is to the state of a control of throttle, once user pine throttle, warning can sense car retardation, after deceleration amplitude reaches alert if, triggering brake lamp is reported to the police, and prompting rear car keeps safe space between motorcars, gives the reaction time that rear car is certain, effectively pre-anti-car rear-end, improves travel safety.
Above disclosedly be only several preferred embodiment of the present invention, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (10)
1. automobile anti-rear end collision automatic alarm method, is characterized in that: comprise the following steps,
Step one: after vehicle start, gathers the road speed V of the n-th time cycle
nwith the road speed V of (n+1)th time cycle
n+1, the difference between (n+1)th time cycle and the n-th time cycle is Δ t;
Step 2: judge V
n+1value whether be 0; If V
n+1=0, then judge that vehicle stops row, terminates computing; If V
n+1≠ 0, then perform step 3;
Step 3: will
compare with the slope X (X < 0) preset,
If
then judge there is not car rear-end possibility, vehicle brake lamp is not reported to the police, and returns step one;
If
then it is determined that the presence of car rear-end possibility, vehicle brake lamp sends alarm, and returns step one.
2. automobile anti-rear end collision automatic alarm method according to claim 1, is characterized in that: after vehicle start-up, starting before, the value of setup times cycle Δ t and the value of slope X.
3. automobile anti-rear end collision automatic alarm method according to claim 2, is characterized in that: the value of described time cycle Δ t is: 10
-6s≤Δ t≤2s.
4. automobile anti-rear end collision automatic alarm method according to claim 2, is characterized in that: the value of described slope X is :-100≤X < 0.
5. the automobile anti-rear end collision automatic alarm method according to claim 1-4 any one, is characterized in that: described alarm is that brake lamp is long bright.
6. automobile anti-rear end collision alerting automatic telling status, is characterized in that: comprise speed acquisition module, data conditioning circuit, car-mounted computer, brake lamp controller and vehicle brake lamp;
Described speed acquisition module, for after vehicle start, gathers the road speed V of the n-th time cycle Δ t
nwith the road speed V of (n+1)th time cycle
n+1, and the data of collection are sent to data conditioning circuit;
Described data conditioning circuit, revises for the data sent speed acquisition module, and revised data is sent to car-mounted computer;
Described car-mounted computer, for carrying out calculation process to the data received, comprising:
Judge V
n+1value whether be 0; If V
n+1=0, then judge that vehicle stops row, terminates computing;
If V
n+1≠ 0, then will
compare with the slope X (X < 0) preset, if
then judge there is not car rear-end possibility, if
then it is determined that the presence of car rear-end possibility, and send alerting signal to brake lamp controller;
Described brake lamp controller, for receiving the alarm command of car-mounted computer and controlling vehicle brake lamp warning.
7. automobile anti-rear end collision alerting automatic telling status according to claim 6, is characterized in that: also comprise sensitivity and arrange module, described sensitivity arranges module and is connected with car-mounted computer, for the scope of setup times cycle Δ t and the scope of slope X.
8. automobile anti-rear end collision alerting automatic telling status according to claim 7, it is characterized in that: described sensitivity arranges module and comprises time cycle setting unit, time cycle memory cell, slope setting unit and slope memory cell, described time cycle setting unit is for user's manual setup times cycle, the time cycle value that the time cycle value of described time cycle cell stores system default and user are manually arranged, described slope setting unit manually arranges slope for user, the slope that the slope of described slope cell stores system default and user are manually arranged.
9. automobile anti-rear end collision alerting automatic telling status according to claim 8, is characterized in that: also comprise power module, and described power module is connected with brake lamp controller, for providing power supply for brake lamp controller.
10. automobile anti-rear end collision alerting automatic telling status according to claim 9, it is characterized in that: also comprise time module, described time module is connected with car-mounted computer with speed acquisition module respectively, the time cycle value arranging module acquisition from sensitivity is sent to time module by described car-mounted computer, and time module triggers speed acquisition module acquires road speed according to described time cycle value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410604145.2A CN104401252A (en) | 2014-10-31 | 2014-10-31 | Automatic alarm system and method for preventing automobile rear-end collision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410604145.2A CN104401252A (en) | 2014-10-31 | 2014-10-31 | Automatic alarm system and method for preventing automobile rear-end collision |
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|---|---|
| CN104401252A true CN104401252A (en) | 2015-03-11 |
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ID=52638945
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|---|---|---|---|
| CN201410604145.2A Pending CN104401252A (en) | 2014-10-31 | 2014-10-31 | Automatic alarm system and method for preventing automobile rear-end collision |
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| CN103350663A (en) * | 2013-07-03 | 2013-10-16 | 韩锦 | Control system and control equipment of vehicle driving safety |
-
2014
- 2014-10-31 CN CN201410604145.2A patent/CN104401252A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2848633Y (en) * | 2005-06-11 | 2006-12-20 | 毛吉纯 | Vehicle speed sudden drop brake lamp alarming control device |
| US20070096885A1 (en) * | 2005-11-03 | 2007-05-03 | Yong-Hua Cheng | Inter-vehicle communication and warning apparatus |
| CN202337232U (en) * | 2011-11-24 | 2012-07-18 | 上海市民办尚德实验学校 | Vehicle rear-end collision prevention device |
| CN202966104U (en) * | 2012-10-24 | 2013-06-05 | 长安大学 | Car anti-rear-end-collision device |
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Application publication date: 20150311 |