CN1868782A - Brake prewarning device - Google Patents
Brake prewarning device Download PDFInfo
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- CN1868782A CN1868782A CN 200510040272 CN200510040272A CN1868782A CN 1868782 A CN1868782 A CN 1868782A CN 200510040272 CN200510040272 CN 200510040272 CN 200510040272 A CN200510040272 A CN 200510040272A CN 1868782 A CN1868782 A CN 1868782A
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Abstract
An improved braking pre-warning device is composed of the flash tail lamps, braking sensor, speed sensor and the analyzing-controlling circuit for braking, which consists of analyzer and pulse signal generator. Said analyzer has a CPU for analyzing the braking state and controlling the width of pulse signal and in turn the turn-on time of flash tail lamp.
Description
Technical field
The present invention relates to a kind of device of early warning when car brakeing is braked, especially a kind of improvement of brake prewarning device belongs to the vehicle accessory technical field.
Background technology
As everyone knows, vehicle is when brake, and the stoplight stop lamp of the tailstock is long bright, thereby can play the effect of the follow-up car retardation of caution, in case rear-end collision takes place.Along with the rapid extension of express highway and improving constantly of the speed of a motor vehicle, this early warning mode weak point obviously displays, and promptly back car driver can't be according to the situation of stoplight stop lamp, the time length that the urgency of perception preceding vehicle brake is delayed and braked.
For this reason, the Chinese invention patent that application number is 93108373.7, the applying date is 1993.07.16 discloses a kind of stoplight stop lamp alarm device with multistage alarm indication.This alarm device is worked as chaufeur and is begun to carry out brake, the continuous of short duration flicker of stoplight stop lamp; Enter the subordinate phase alarm subsequently: the stoplight stop lamp fast blink; Enter the phase III alarm at last: stoplight stop lamp is normal bright combustion state, therefore the brake time showing of front truck can be alarmed to front vehicle, prevents the traffic accident of overtaking collision vehicle.
Yet, what the three phases stoplight stop lamp flicker frequency of above patented technology in brake process changed reflection only is the brake time of vehicle, the decline situation of the existing condition that can not reflect brake---the speed of a motor vehicle, therefore still need the driver to take the measure of braking accordingly, could effectively avoid rear-end collision according to individual intuition.
Summary of the invention
The objective of the invention is to: at the deficiency of above prior art existence, a kind of brake prewarning device that can reflect speed of a motor vehicle decline situation when braking is proposed, thereby be convenient to the driver according to taking the measure of braking accordingly, effectively avoid rear-end collision, improve traveling security.
In order to reach above purpose, technical scheme of the present invention is: brake prewarning device comprises the flashing lamp that is placed in the tailstock, also comprise brake sensor, car speed sensor, the brake analysis controling circuit, the work control end of the signal output termination brake analysis controling circuit of described brake sensor, contain analysis circuit and pulse signal generation circuit in the described brake analysis controling circuit, the signal input part of the signal output termination analysis circuit of described car speed sensor, the control signal output ends of described analysis circuit connects flashing lamp by pulse generating circuit, contains in the described analysis circuit in order to when brake speed of a motor vehicle in unit time descends greater than the setting value short spacing pulse of control output, the long spacing pulse of control output when brake speed of a motor vehicle in unit time descends less than setting value, control output continues to light the cpu circuit of signal when the brake speed of a motor vehicle is 0.
Like this, when vehicle began to brake, the brake analysis controling circuit is controlled by brake sensor started working, and receives the vehicle speed signal from car speed sensor, and judges speed of a motor vehicle decline scope by the CPU in the analysis circuit by computing.
When brake speed of a motor vehicle in unit time descends greater than setting value, illustrate that vehicle is in the emergency brake state, so the short spacing pulse of CPU control wave generation circuit output hurriedly glimmers stoplight stop lamp, take corresponding emergency braking measure thereby warn follow-up vehicle;
When brake speed of a motor vehicle in unit time descends less than setting value, illustrate that vehicle is in mild deceleration regime, so the long spacing pulse of CPU control wave generation circuit output makes the gentle flicker of stoplight stop lamp, thereby reminds follow-up vehicle to take corresponding brake snub measure;
When brake speed of a motor vehicle feedback speed is 0, illustrate that vehicle has been in dead ship condition, so CPU control output continues to light signal, it is luminous that stoplight stop lamp is continued, and informs that follow-up vehicle must stop.
This shows that the present invention by original stoplight stop lamp, has solved the demonstration problem of braking state with scientific and reasonable conceptual design, thereby is convenient to driver, especially new hand according to taking the measure of braking accordingly, effectively avoids rear-end collision, improve traveling security.
Description of drawings
The present invention is further illustrated below in conjunction with accompanying drawing.
Fig. 1 is the structured flowchart of one embodiment of the invention.
Fig. 2 is the schematic circuit diagram of Fig. 1 embodiment.
The specific embodiment
Embodiment one
The brake prewarning device of present embodiment mainly is made up of brake sensor, car speed sensor, brake analysis controling circuit, brake prewarning device instrument and the brake flashing lamp that is placed in the tailstock as shown in Figure 1.Wherein, the signal input part of the signal output termination analysis circuit of car speed sensor.The control signal of analysis circuit is converted to impulse singla output and connects the brake flashing lamp.The work control end of the signal output termination brake analysis controling circuit of brake sensor can be opened the brake analysis controling circuit when chaufeur brakes, make it continue to be in compute mode, receives the incoming signal of car speed sensor, and carries out analysis and Control work.
The brake analysis controling circuit is referring to Fig. 2, wherein analysis circuit mainly is made of the cpu chip C1 (model TMS320F206) of AND circuit B2 and band A/D conversion, and pulse signal generation circuit mainly is made of flashing circuit chip (model NE555) and 4LED flashing lamp.
The signal output part of BK Brake Switch K connects the trigger end of cpu chip C1 by gate circuit B1 and resistance R 1, also connect the input end of another gate circuit B2 through resistance R 2 by the output of gate circuit B1, another input end of this gate circuit of signal output termination B2 of car speed sensor M (model FS8011 magnetoelectric tachometric transducer), the mouth of this gate circuit B2 connects the signal input part of cpu chip C1 through resistance R 3.
The pulse control signal mouth of cpu chip connects the input end of flashing circuit chip C2 by diode D, and the output of this flashing circuit chip connects four LED flashing lamps in parallel.
In addition, also include the brake self-checking circuit in the brake prewarning device of present embodiment, the output of automobile starting switch A connects the self check trigger end of cpu chip, and the self-detection result mouth of this cpu chip connects the 1LED lamp (the brake prewarning device instrument of pie graph 1) that is arranged on the instrument carrier panel by the 3rd gate circuit.
Behind automobile starting, starting switch A triggers cpu chip C1, and whether normal, and the output corresponding signal if detecting the work of brake electronic system, through B3, be presented on the instrument carrier panel by 1LED.Just often, the 1LED flicker was extinguished after one second; When brake system broke down, flicker in per 0.5 second once.
When chaufeur braked, K switch was connected, and B1 triggers C1 by R1, the computing that begins to brake.Simultaneously B1 excites B2 by R2 again, and beginning is with the setting data closeness---and per second 18 times, be that pitch time 0.0556 second (1 ÷ 18=0.0556) receives the vehicle wheel rotational speed information from car speed sensor M, vehicle wheel rotational speed decline information passed to C1 by R3,
Cpu chip carries out following analysis computing and output control by preset program, and particular case has following three kinds:
1, when the brake speed of a motor vehicle in 0.0556 second unit time, descended greater than the former speed of a motor vehicle 50% the time, export the short spacing pulse control signal of per second 4 times;
2, when the brake speed of a motor vehicle in 0.0556 second unit time, descended less than the former speed of a motor vehicle 50% the time, export the long spacing pulse control signal of per second 1 time;
3, when the brake speed of a motor vehicle is 0, control output continues to light signal;
Control signal is transferred to flashing circuit C2 by diode D, and C2 is according to the light that drives 4LED light-emitting diode group flicker different frequency from the different signal of C1, thus the demonstration braking state.
This shows, the brake prewarning device of present embodiment is with three different cooresponding with it different braking states of illumination mode reflection of brake flashing lamp, compare with the existing mode in brake stage that shows, can reflect the brake situation more scientifically and rationally, the caution front vehicle is taked the measure of braking accordingly, thereby more effectively avoids the generation of rear-end collision.
In addition to the implementation, the present invention can also have other embodiments.For example adopt other circuit devcie or other light source, or the like.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (4)
1. brake prewarning device, comprise the flashing lamp that is placed in the tailstock, it is characterized in that: also comprise brake sensor, car speed sensor, the brake analysis controling circuit, the work control end of the signal output termination brake analysis controling circuit of described brake sensor, contain analysis circuit and pulse signal generation circuit in the described brake analysis controling circuit, the signal input part of the signal output termination analysis circuit of described car speed sensor, the control signal output ends of described analysis circuit connects flashing lamp by pulse generating circuit, contain cpu circuit in the described analysis circuit, in order to
-short the spacing pulse of control output when brake speed of a motor vehicle in unit time descends greater than setting value;
-long the spacing pulse of control output when brake speed of a motor vehicle in unit time descends less than setting value;
-control output continues to light signal when the brake speed of a motor vehicle is 0.
2. according to the described brake prewarning device of claim 1, it is characterized in that: described brake sensor is a BK Brake Switch, the signal output part of described BK Brake Switch connects the trigger end of CPU by first gate circuit, its another output connects the input end of second gate circuit, another input end of described second gate circuit of signal output termination of described car speed sensor, the signal input part of the output termination CPU of described second gate circuit.
3. according to the described brake prewarning device of claim 2, it is characterized in that: the input end of the pulse control signal output termination flashing circuit chip of described cpu chip, the output of described flashing circuit chip connects LED flashing lamp in parallel.
4. according to the described brake prewarning device of claim 3, it is characterized in that: also include the brake self-checking circuit, the output of automobile starting switch connects the self check trigger end of described CPU, and the self-detection result mouth of described CPU connects the LED lamp that is positioned on the instrument carrier panel by the 3rd gate circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510040272 CN1868782A (en) | 2005-05-27 | 2005-05-27 | Brake prewarning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510040272 CN1868782A (en) | 2005-05-27 | 2005-05-27 | Brake prewarning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1868782A true CN1868782A (en) | 2006-11-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510040272 Pending CN1868782A (en) | 2005-05-27 | 2005-05-27 | Brake prewarning device |
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| CN (1) | CN1868782A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602332A (en) * | 2012-03-28 | 2012-07-25 | 西南林业大学 | Real-time display system for deceleration strength and deceleration value of vehicle |
| CN102653257A (en) * | 2011-03-03 | 2012-09-05 | 熊为能 | Rear-end collision preventing brake early warning device |
| CN106080374A (en) * | 2016-06-23 | 2016-11-09 | 芜湖安瑞光电有限公司 | A kind of vehicle signal lamp control system |
-
2005
- 2005-05-27 CN CN 200510040272 patent/CN1868782A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102653257A (en) * | 2011-03-03 | 2012-09-05 | 熊为能 | Rear-end collision preventing brake early warning device |
| CN102602332A (en) * | 2012-03-28 | 2012-07-25 | 西南林业大学 | Real-time display system for deceleration strength and deceleration value of vehicle |
| CN102602332B (en) * | 2012-03-28 | 2015-09-02 | 西南林业大学 | The deceleration intensity of vehicle and the real-time display system of deceleration value |
| CN106080374A (en) * | 2016-06-23 | 2016-11-09 | 芜湖安瑞光电有限公司 | A kind of vehicle signal lamp control system |
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