CN101488289A - Vehicle speed alarm system and method - Google Patents
Vehicle speed alarm system and method Download PDFInfo
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- CN101488289A CN101488289A CNA2008100036559A CN200810003655A CN101488289A CN 101488289 A CN101488289 A CN 101488289A CN A2008100036559 A CNA2008100036559 A CN A2008100036559A CN 200810003655 A CN200810003655 A CN 200810003655A CN 101488289 A CN101488289 A CN 101488289A
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Abstract
The invention provides a vehicle speed warning system and a method thereof. The system can be arranged in the vehicle body and comprises a modulation module and a demodulation module, wherein the modulation module sends a traveling speed to a rearward vehicle when the vehicle brakes, the rearward vehicle reads, by the demodulation module, the signal sent by the modulation module of the forward vehicle, so that the driver of the rearward vehicle is aware of the traveling speed of the forward vehicle, thus reducing the accident incidence of rear-end and overtaking collision.
Description
Technical field
The present invention relates to a kind of caution system and method, especially a kind of vehicle speed alarm system and method.
Background technology
Along with popularizing of automobile, the increasing people trip that drives a car voluntarily, because the recoverable amount of automobile is more and more, traffic hazard also gets more and more, and in all kinds of traffic hazards, the overtaking collision incident that knocks into the back is the most general.
Cause the knock into the back one of the main reasons of overtaking collision of vehicle, be because the spacing between car and the car is crossed near or the too fast institute of road speed causes, in the vehicle ' process, if the vehicle of front brakes suddenly, trailing thereafter, the driver of vehicle often has little time brake and causes the overtaking collision accident that knocks into the back.For reducing the accident rate of the above-mentioned overtaking collision of knocking into the back, be provided with one group apart from confirming that board (for example: " 0m " sign is set during at 0m through being everlasting every a segment distance on the highway, " 50m ", " 100m ", " 200m " sign are set respectively at 50m, 100m, 200m place again) or on the track, be horizontally set with many equally spaced spacing caution bars, so that when vehicle is advanced, can guarantee to keep certain spacing with front vehicles in car steering.So, can prevent that a part of overtaking collision accident that knocks into the back from taking place, yet above-mentioned space confirmation board or spacing caution bar all only are installed in fixing or certain location, therefore, car steering can't judge at any time and front vehicles between spacing.
And in order to remind the car steering that travels on front vehicle, each vehicle is equipped with a plurality of brake warning lamps, when vehicle brake, the brake warning lamp is opened immediately, make the driving of front vehicle can access to a certain degree prompting after, also with the front vehicles reducing speed.Yet, existing brake warning lamp, only possesses the Push And Release two states, can not provide remaining running information to the rear steering vehicle, for example, the automobile that the travel speed that existing brake lamp can not provide front vehicles is driven to the rear even front vehicle is driven know front vehicles to be braked, but has little time to stop the knock into the back accident of overtaking collision to take place because the speed of a motor vehicle each other is all too fast.
Summary of the invention
Do not possess the information of transmission road speed to front vehicle for solving existing brake lamp, and the problem of the easy overtaking collision accident that knocks into the back of generation, the invention provides a kind of vehicle speed alarm system and method, this system is located at automobile body, and it comprises: a modulation module and a demodulation module:
This modulation module is used to export this garage vehicle speed and gives the rear automobile, and it comprises:
One brake inductor is used to respond to brake;
One speed sensor is used for induction automobile running speed;
One microprocessor, the input end of this microprocessor connect this brake inductor and this speed sensor respectively, and this microprocessor is to trigger automobile driving speed when reading brake by this brake inductor, and transfers automobile driving speed to binary signal output; And
One brake lamp is to connect this output end of microprocessor, and this brake lamp produces according to this binary signal has the binary light signal that flickers and change; And
This demodulation module is used to resolve the binary light signal that this modulation module sends, and it comprises:
One sensing unit is used to receive binary light signal and the external environment bias light signal that the front automobile brake lamp flickers and changes;
One processing unit is connected with the output terminal of this sensing unit, is used to receive the output signal of this sensing unit, and differentiates the variation that flickers of front automobile brake lamp; And
One output unit is connected the output terminal of this processing unit, is used to receive the output signal of this processing unit, and is exported.
Aforesaid modulation module further comprises a switch, be located at this microprocessor and this brake lamp between, wherein the control end of this switch is connected in this output end of microprocessor, the input end of this switch connects a power supply, this output switching terminal connects this brake lamp, make this microprocessor control the switch motion of this switch, and then make this brake lamp produce the variation that flickers according to the binary signal of output.
And aforesaid sensing unit comprises a car light optical inductor and an environment light sensor, and this car light optical inductor can be responded to front vehicles brake light signal, but this environment light sensor induced environment bias light signal.
This processing unit comprises at least one comparator circuit, at least two rectifiers, at least two signal amplifiers and at least one output processor, after the positive pole input of this comparator circuit and negative pole input respectively are connected in series a rectifier and an amplifier in regular turn, be connected with this car light optical inductor and this environment light sensor respectively again, and the output terminal of this comparator circuit connects this output processor, and the output terminal of this output processor connects this output unit.
Whether the present invention also provides a kind of vehicle speed alarm method, comprising: detect the brake of this car and start; When if brake starts, detect the road speed of this car; With this road speed conversion binary signal; Drive this car brake lamp according to this binary signal, make brake lamp produce the variation that flickers of representing this road speed according to the frequency that flickers; The rear automobile receives the variation that flickers of this car brake lamp; And the rear automobile will flicker to change and be converted to discernible output signal.
So, front vehicles can send the demodulation module of road speed to the rear automobile by this modulation module, make the rear car steering forwardly during braking automobile, learn the road speed of front automobile, provide the rear car steering can adjust its road speed and running distance, take place with the knock into the back accident of overtaking collision of minimizing.
Description of drawings
Fig. 1 uses synoptic diagram for preferred embodiment of the present invention;
Fig. 2 is the modulation module system block diagrams of preferred embodiment of the present invention;
Fig. 3 is the demodulation module system block diagrams of preferred embodiment of the present invention;
Fig. 4 is the binary signal synoptic diagram of preferred embodiment of the present invention.
The primary clustering symbol description
10 modulation modules
12 brake inductors
14 speed sensors
16 microprocessors
17 switches
18 power supplys
19 brake lamps
20 demodulation modules
22 sensing units
222 car light optical inductors
224 environment light sensors
24 processing units
242 comparator circuits
244 rectifiers
246 signal amplifiers
248 output processors
26 output units
30 automobile bodies
Embodiment
Fig. 1 is a preferred embodiment operation instruction of the present invention, and as shown in the figure, the vehicle speed alarm system of present embodiment system is located at an automobile body 30, and this vehicle speed alarm system comprises a modulation module 10 and a demodulation module 20.
Fig. 2 is the system architecture diagram of modulation module 10, it comprises a brake inductor 12, one speed sensor 14, one microprocessor 16, one switch 17, one power supply 18 and a brake lamp 19, wherein, the output terminal of brake inductor 12 and speed sensor 14 is connected to this microprocessor 16 respectively, the output terminal of this microprocessor 16 is connected to the control end of this switch 17, the input end of this switch 17 connects this power supply 18, the output terminal of this switch 17 then is connected to brake lamp 19, in addition, this brake lamp 19 can be located at the rear of automobile body 30, is used to send a signal to the rear automobile.
Fig. 3 is the system architecture diagram of this demodulation module 20, this demodulation module 20 comprises a sensing unit 22, a processing unit 24 and an output unit 26, wherein, the output terminal of this sensing unit 22 is connected to this processing unit 24, the output terminal of this processing unit 24 is connected to this output unit 26, in addition, this sensing unit 22 can be located at the place ahead of automobile body 30, is used to receive the signal that front automobile sends.
This processing unit 24 further comprises at least one comparator circuit 242, at least two rectifiers 244, at least two signal amplifiers 246 and output processors 248, wherein, behind one group of rectifier 244 of each elder generation's serial connection of the two input ends difference of this comparator circuit 242, connect one group of signal amplifier 246 again, the output terminal of this comparator circuit 242 then is connected to this output processor 248.
In addition, this sensing unit 22 comprises at least one car light optical inductor 222 and at least one environment light sensor 224 in addition, these car light optical inductor 222 output terminals are connected to the signal amplifier 246 that joins with comparator circuit 242 electrode input ends, and the output terminal of this environment light sensor 224 is connected to the signal amplifier 246 that joins with comparator circuit 242 negative inputs.
In conjunction with reference to figure 1, Fig. 2 and Fig. 3; When two vehicles are all installed the vehicle speed alarm system of present embodiment, perhaps, when the place ahead automobile is installed aforesaid modulation module 10 and rear automobile aforesaid demodulation module 20 is installed, when the automobile that is positioned at the place ahead brakes, this brake inductor 12 will be exported a trigger pip and give this microprocessor 16, at this moment, this microprocessor 16 reads the front automobile speed of a motor vehicle at that time by this speed sensor 14, then, this microprocessor 16 is converted to binary signal with the speed of a motor vehicle that is read, and by this this switch 17 of binary signal output control, 17 on this switch is according to open circuit the action with conducting of the binary signals of input, promptly when microprocessor 16 is output as " 1 ", and these switch 17 conductings, and when microprocessor 16 was output as " 0 ", this switch 17 was and opens circuit; Then, if be when opening circuit when switch 17, this brake lamp 19 and power supply 18 form and open circuit and make this brake lamp 19 be closed condition, and when switch 17 conductings, this brake lamp 19 and these power supply 18 loop conductings and brake lamp 19 is opened.
Again with reference to figure 1, the car light optical inductor 222 of rear automobile changes with the luminance brightness that environment light sensor 224 continues the reception external environment condition, the signal that this car light optical inductor 222 and environment light sensor 224 are received is respectively by behind the signal amplifier 246 that is connected in series and the rectifier 244, importing this comparator circuit 242 compares, if when the brake lamp 19 of the place ahead automobile is opened, the car light optical inductor 222 received light signal strengths of rear automobile are higher than the received environmental background light intensity of environment light sensor 224, the output result of the comparator circuit 242 of rear automobile is the accurate position of a high voltage signal, on the contrary, if when the brake lamp 19 of the place ahead automobile is closed, the car light optical inductor 222 received light signal strengths of rear automobile are less than or equal to the light signal strength that this environment light sensor 224 is received, the accurate position of these comparator circuit 242 output LOW voltages signal; Then, the result of the comparator circuit 242 of rear automobile exports this output processor 248 to, and output processor 248 exports output unit 26 to notice rear car steering then with the output data of comparator circuit 242 after conversion process.
For example, when being 100 kilometers/hour, the travel speed of the place ahead automobile carries out brakes, the binary signal that this microprocessor 16 exports this switch 17 to is " 01100100 ", so the switch 17 of front automobile opens and closes action according to this binary signal, that is " 0 " representation switch 17 opens circuit and 17 conductings of " 1 " representation switch, the brake lamp 19 that orders about front automobile produces the variation that flickers in view of the above, and it flickers and changes as shown in Figure 4.Behind the variation light signal " 01100100 " that flickers that the brake lamp 19 that the sensing unit 22 of rear automobile receives front automobile is transmitted, treated unit 24 light signal that changes that will flicker is converted to 26 energy received signals of this output unit, export to inform the front vehicle driving.Further, this switch 17 can be a transistor, MOSFET for example, wherein the gate of this MOSFET is connected to this microprocessor 16 output terminals, and the source electrode of this MOSFET is connected to this power supply 18, and the drain of this MOSFET then is connected to this brake lamp 19, so, when the accurate position of microprocessor 16 output HIGH voltages signal, this transistor turns makes the electric power of power supply 18 may be output to this brake lamp 19.
Further, this output unit 26 can be a display or sound play device, be used to export the output signal of processing unit 24, with caution rear car steering, in for example aforementioned enforcement, this output unit 26 is informed the rear car steering with 100 kilometers/hour information in the mode of display modes such as LED or sound playing.
In addition, other optical noise with the variation of flickering disturbs and causes erroneous judgement for fear of environment, and avoid the rear car steering can not be subjected to the problem of the brake lamp 19 flicker institute vision that the causes interference of front vehicles, can be by adjusting the output terminal transfer rate of this microprocessor 16, make brake lamp 19 form a fixing flash speed and carry out data transmission, for example 9600 times/second, then transmitting time is about 1ms (T2 as shown in Figure 4) each time, so, because human eyes have visual persistence effect for the variation of light, the rear is driven be not subjected to front vehicles to transmit the interference of the flicker of signal because of brake lamp 19, and also fix because of its transmission speed, can effectively make this demodulation module 20 can distinguish the difference that rate signal that brake lamp 19 transmitted and general environment light change, and then avoid output processor 248 erroneous judgements of rear automobile.
In addition, general car steering is carried out the time delay of brake usually greater than 1s (T1+T3) at every turn, carrying out brake when car steering begins, give the rear car steering according to the foregoing description with the mode transfer rate signal of brake lamp 19 fast blinks earlier, because the required time (T3) of transfer rate signal can finish in number ms, then, comparator circuit 242 outputs of rear automobile then are the accurate position output of a series of high voltage (as the signal in T1 interval), erroneous judgement for 24 pairs of T1 wayside signalings of output processor of avoiding the rear automobile, front automobile is fixing and transfer rate (shortening T2) fast with one, can effectively avoid vehicle speed signal and front automobile to drive the brake lamp 19 flickers difference each other that consecutive intervals brake behavior causes, promptly as shown in Figure 4, be T1 the interval time of the consecutive intervals brake that drive in the place ahead, because the T1 time, then the car light optical inductor 222 of front vehicle can be distinguished the two difference generally speaking all much larger than T2.
So, enforcement example according to above stated specification, can give front automobile brake lamp 19 and possess the function of the information of transmission road speed to the rear car steering, make the rear car steering not only obtain caution, also can know the road speed of front vehicles, front vehicle is driven can adjust own road speed at any time, keeping the safe distance with front vehicles, and then the accident generation of the overtaking collision of avoiding knocking into the back.
Claims (11)
1. a vehicle speed alarm system is located at automobile body, and it comprises a modulation module and a demodulation module;
This modulation module is used to export this garage vehicle speed and gives the rear automobile, comprising:
One brake inductor is used to respond to brake;
One speed sensor is used for induction automobile running speed;
One microprocessor, the input end of this microprocessor connects this brake inductor and this speed sensor respectively, this microprocessor triggers by this brake inductor, is used to read the automobile driving speed when braking, and transfers automobile driving speed to binary signal output; And
One brake lamp is connected with this output end of microprocessor, and the variation that can flicker of this brake lamp presents the binary signal of this microprocessor output, forms binary light signal output; And
This demodulation module is used to resolve the binary light signal that this modulation module sends, and comprising:
One sensing unit is used to receive binary light signal and the external environment bias light signal that the front automobile brake lamp flickers and changes;
One processing unit is connected with the output terminal of this sensing unit, is used to receive the input signal of this sensing unit, and differentiates the variation that flickers of front automobile brake lamp; And
One output unit is connected with the output terminal of this processing unit, is used to receive the output signal of this processing unit, and is exported.
2. vehicle speed alarm system as claimed in claim 1, it is characterized in that, this modulation module further comprises a switch, be located between this microprocessor and this brake lamp, wherein the control end of this switch is connected this output end of microprocessor, and the input end of this switch connects a power supply, and this output switching terminal connects this brake lamp, this microprocessor is controlled the switch motion of this switch according to the binary signal of output, makes this brake lamp produce the variation that flickers.
3. vehicle speed alarm system as claimed in claim 2, it is characterized in that, this sensing unit comprises a car light optical inductor and an environment light sensor, and this car light optical inductor can be responded to front vehicles brake light signal, and this environment light sensor is used for induced environment bias light signal.
4. vehicle speed alarm system as claimed in claim 3, it is characterized in that, this processing unit comprises at least one comparator circuit, at least two rectifiers, at least two signal amplifiers and at least one output processor, after the positive pole input of this comparator circuit and negative pole input respectively are connected in series a rectifier and an amplifier in regular turn, be connected with this car light optical inductor and this environment light sensor respectively again, and the output terminal of this comparator circuit connects this output processor, and the output terminal of this output processor connects this output unit.
5. as claim 1,2, each described vehicle speed alarm system of 3 or 4, it is characterized in that this switch is a transistor.
6. vehicle speed alarm system as claimed in claim 5 is characterized in that, this output unit is display device or sound play device.
7. vehicle speed alarm system as claimed in claim 6 is characterized in that, this rectifier is a half-wave rectifier.
8. vehicle speed alarm system as claimed in claim 1 is characterized in that, the frequency that changes that flickers of this brake lamp is 9600 times/second.
9. a vehicle speed alarm method is characterized in that, comprising:
Whether detect the brake of this car starts;
When if brake starts, detect the road speed of this car;
With this road speed conversion binary signal;
Drive this car brake lamp according to this binary signal, brake lamp produces the variation that flickers of representing this road speed according to the frequency that flickers;
The rear automobile receives the variation that flickers of this car brake lamp; And
The rear automobile will flicker to change and be converted to discernible output signal.
10. vehicle speed alarm method as claimed in claim 9 is characterized in that, the described frequency that flickers is 9600 times/second.
11. vehicle speed alarm method as claimed in claim 10 is characterized in that, described discernible output signal comprises voice signal and vision signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100036559A CN101488289A (en) | 2008-01-17 | 2008-01-17 | Vehicle speed alarm system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100036559A CN101488289A (en) | 2008-01-17 | 2008-01-17 | Vehicle speed alarm system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101488289A true CN101488289A (en) | 2009-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100036559A Pending CN101488289A (en) | 2008-01-17 | 2008-01-17 | Vehicle speed alarm system and method |
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| CN (1) | CN101488289A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162872A (en) * | 2015-09-22 | 2015-12-16 | 福州市智聚物联科技有限公司 | Method for managing and controlling use of vehicle lamps by applying new generation information technology |
| CN105489036A (en) * | 2015-12-28 | 2016-04-13 | 南宁学院 | FSC racing car brake prompting system |
| CN111591209A (en) * | 2020-06-01 | 2020-08-28 | 西安电子科技大学芜湖研究院 | Automobile lamp communication braking system |
-
2008
- 2008-01-17 CN CNA2008100036559A patent/CN101488289A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162872A (en) * | 2015-09-22 | 2015-12-16 | 福州市智聚物联科技有限公司 | Method for managing and controlling use of vehicle lamps by applying new generation information technology |
| CN105489036A (en) * | 2015-12-28 | 2016-04-13 | 南宁学院 | FSC racing car brake prompting system |
| CN111591209A (en) * | 2020-06-01 | 2020-08-28 | 西安电子科技大学芜湖研究院 | Automobile lamp communication braking system |
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Open date: 20090722 |