CN114074600A - Intelligent automobile brake lamp system and working method thereof - Google Patents
Intelligent automobile brake lamp system and working method thereof Download PDFInfo
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- CN114074600A CN114074600A CN202010811936.8A CN202010811936A CN114074600A CN 114074600 A CN114074600 A CN 114074600A CN 202010811936 A CN202010811936 A CN 202010811936A CN 114074600 A CN114074600 A CN 114074600A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/44—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal
- B60Q1/444—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal with indication of the braking strength or speed changes, e.g. by changing shape or intensity of the indication
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Abstract
The invention relates to an intelligent automobile brake lamp system and a working method thereof, wherein the system comprises a brake lamp, a control module, a wheel speed acquisition module and a brake pedal signal sensor; the brake signal output end of the brake pedal signal sensor and the angular speed signal output end of the wheel speed acquisition module are connected with the signal input end of the control module; the control module processes the angular speed data acquired by the wheel speed acquisition module, calculates the current intensity of the brake lamp and controls the brightness of the brake lamp according to the current intensity. The speed change rate is fed back really through the wheel speed change, the rear vehicle is warned effectively corresponding to different working states of the brightness change of the brake lamp, and the warning performance of the rear vehicle is improved; and the speed of the vehicle changes to 0 after the vehicle stops, the brightness of the brake lamp is lowest at the moment, the operation that the brake is stepped on for a long time such as waiting for a red light is effectively avoided, and the brake lamp is too dazzling to interfere with a rear vehicle.
Description
Technical Field
The invention relates to an intelligent automobile brake lamp system and a working method thereof, belonging to the application field of semiconductor optical devices in the automobile industry.
Background
With the increasing popularization of automobiles, more and more private automobiles become a travel tool for people to walk instead of others, and more rapid driving licenses get a way, so that more dangers and hidden dangers are increased on crowded roads. The rear-end collision of the stop-and-go city becomes a common traffic accident. Along with the increase of urban traffic pressure, more and more drivers select automatic-stop cars, and when green lights are arranged at intersections, some drivers do not have good driving maintenance, and step on brakes in the whole process, and the dazzling brake lights cause strong interference to drivers of rear cars. How let "good at brake" no longer become the label of novice driver, let the warning that the brake lamp can be more intelligent wait for a bus, let the brake lamp that the intersection waited for no longer become light pollution.
At present, a sensor is arranged on a brake pedal of an automobile, the brake lamp is lightened after the pedal is stepped, and then the brake mechanical device is continuously stepped to trigger, so that the braking effect is achieved. The brake lamp is used for warning the rear vehicle and paying attention to the dynamic state of the front vehicle. Cost is controlled from an economic perspective and can be achieved with the least expensive position sensor. Therefore, the brake lamp adopted by most conventional automobiles is realized singly, and when a brake pedal is stepped, the brake lamp is turned on, and the brake lamp is turned off when the brake pedal is released. At present, a car with a little high end is provided with a plurality of brake lamp sets, and different modes are started under different braking conditions. With the increasing importance of automobile safety, the conventional automobile has gradually popularized the effect of double flashing of the emergency brake lamp. With the technical progress and the attention of people on safety, more advanced intelligent automobile brake lamps are increasingly demanded.
At present, conventional intelligent brake lamps on the market adopt various technical schemes, sense the treading force of a brake pedal by a force sensor, and open different brake lamp sets according to different vehicle speeds. But the braking capability is different, and the dynamic state of the front vehicle cannot be known intuitively by the rear vehicle by the technical scheme.
Chinese patent document CN205601690U discloses an intelligent safety brake system with intensity indication, which uses an ADXL345 accelerometer, and carries conventional brake hardware such as a sensor for automobile braking, a cd-rom module, etc. to realize the safety prompt of the front speed change triggering the turn-on of the brake light. The change situation of the speed of the front vehicle can be effectively and intuitively realized, but the real situation of braking of the front vehicle cannot be really fed back, for example, the speed is slowed down due to the fact that the front vehicle ascends a slope or power is reduced, and at the moment, the accelerometer triggers the brake lamp to light, but the intention of a driver of the front vehicle to actively brake is not represented.
Chinese patent document CNCN104986099A discloses an intelligent car light control method and system, which uses a series of control systems to analyze the external light intensity and then control the working state of the double flashing lights through light sensing components, thereby achieving the effect of warning the car after warning. However, this patent does not provide an intuitive connection between the change in vehicle speed and the operating state of the lights.
Chinese patent document CN106828295A discloses a brake light and brake system, which uses a series of control systems and detection modules to complete the judgment of the braking force, and the collected data is used to analyze the braking degree through parameters such as displacement pressure resistance, etc., and is related to different working states of the brake light. The invention only discloses one working principle of the brake lamp, but the feedback of the state of a real vehicle is not realized through the collection and analysis of the brake pedal or other data on the braking force and degree.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an intelligent automobile brake lamp system which comprises a brake lamp, a control module and a wheel speed acquisition module, has a relatively simple structure, determines the working brightness of the brake lamp according to the speed of the speed change rate of a vehicle, and plays a more humanized role in safety warning of a rear automobile.
The invention also provides a working method of the intelligent automobile brake lamp system.
The technical scheme of the invention is as follows:
an intelligent automobile brake lamp system comprises a brake lamp, a control module, a wheel speed acquisition module and a brake pedal signal sensor; the brake signal output end of the brake pedal signal sensor and the wheel angular speed signal output end of the wheel speed acquisition module are connected with the signal input end of the control module, and the output end of the control module is connected with the brake lamp; the control module carries out data processing on the wheel angular speed acquired by the wheel speed acquisition module, calculates the current intensity of the brake lamp and controls the brightness of the brake lamp according to the current intensity.
According to the intelligent automobile brake lamp system, different brake lamps are displayed according to the change speed of the actual speed, and a better warning effect is achieved. The change of the brightness of the brake lamp along with the change rate of the reduction of the vehicle speed can be realized, the higher the acceleration is, the higher the brightness is, and therefore the change condition of the speed of the front vehicle can be really reflected by the warning performance of the intelligent brake lamp. The more rapid the brake, the larger the lamp brightness, the vehicle speed change rate after the brake is stopped is 0, and the brake lamp brightness is the lowest at the moment, so that the situation that the brake lamp is too bright when waiting for a signal lamp is similar, and particularly the light pollution to a rear vehicle caused by rainy night at night can be avoided.
According to the present invention, the wheel speed obtaining module obtains the wheel angular speed through any one of a wheel speed sensor, a vehicle Electronic Control Unit (ECU), an Electronic Stability Program (ESP), an anti-lock brake system (ABS), and an emergency brake warning system (ESS). The wheel angular velocity data can be conveniently acquired.
According to the present invention, the wheel speed sensor is preferably any one of an electromagnetic sensor type wheel speed sensor, a hall effect type wheel speed sensor, and a photoelectric type wheel speed sensor.
The working method of the intelligent automobile brake lamp system comprises the following steps:
when the brake pedal is stepped on, the brake pedal signal sensor transmits a brake signal to the control module, and then the brake lamp is triggered to be turned on; the wheel speed acquisition module acquires a wheel angular velocity omega and transmits the wheel angular velocity omega to the control module, and the control module calculates an angular acceleration a: a is Δ ω/Δ t, Δ t represents a time variation, and Δ ω represents a variation of the wheel angular velocity ω within Δ t; the control module calculates the working current I of the brake lamp according to the angular acceleration a1From the power formula P ═ I1*U1＝I1R2, P represents power, U1The operating voltage of the brake light is indicated, and R represents the resistance of the brake light, so that the power of the brake light, i.e. the brightness of the brake light, can be changed by changing the current.
According to the invention, the control module preferably calculates the brake light operating current I from the angular acceleration a1The method specifically comprises the following steps: i is1＝I0+a*I0*A(I)，
In the formula (I), I1Indicating the operating current of the brake light, I0Indicating the current required for maintaining the minimum brightness warning of the brake light, a indicates the angular acceleration, and A isAnd (4) counting. The coefficient A controls the working current not to exceed the maximum working current of the brake lamp under the maximum braking angular acceleration of the vehicle.
In the braking process, when the angular acceleration alpha is less than 0, the larger the angular acceleration is, the larger the intensity of the output current of the brake lamp is; the faster the real speed change of the vehicle is, the more sudden the braking is actually, the higher the output current intensity of the brake lamp is, and the higher the brightness of the brake lamp is;
when the red light is on, and the angular acceleration alpha is 0 when the brake is pressed for a long time, the output current intensity of the brake light is the lowest constant value, the lowest brightness of the brake light is maintained, and the rear vehicle is warned that the front vehicle is in the brake state.
According to the invention, preferably, the control module adopts a single chip microcomputer or a PLC to judge the brake signal and the angular velocity signal and carry out programming control on the line control;
further preferably, a single chip microcomputer with the model of STC12C5408AD is adopted to judge the brake signal and the angular speed signal and program control the line control. The cost of the single chip microcomputer is low.
The invention has the beneficial effects that:
1. this patent aims at providing the intelligent brake light of being convenient for to popularize with low costs, consequently more advocates the output value with sensor signal direct processing, through control module direct action car brake light circuit.
2. The work brightness of the brake lamp is determined through the speed of the angular speed change rate of the vehicle, the speed of the angular speed change rate of the vehicle is judged by adopting the data of the own wheel speed sensor, the change of the output current of the brake lamp is changed, and therefore the difference of the brightness of the brake lamp is caused, namely the wheel speed change is larger, the brightness of the vehicle lamp is larger, the speed change rate of the vehicle lamp is intuitively fed back, and the braking condition of the front vehicle is accurately known.
3. The advantages of reading the wheel speed signal by the wheel speed sensor in the present invention are also: the brake lamp change caused by factors such as the reduction of brake force or the virtual position of a brake pedal can not correspond to the real speed.
4. According to the method for the intelligent brake lamp, the speed change rate is really fed back through the wheel speed change, the rear vehicle is effectively warned corresponding to different working states of the brightness change of the brake lamp, and the warning performance of the rear vehicle is improved; and the speed of the vehicle changes to 0 after the vehicle stops, the brightness of the brake lamp is lowest at the moment, the operation that the brake is stepped on for a long time such as waiting for a red light is effectively avoided, and the brake lamp is too dazzling to interfere with a rear vehicle.
5. In the invention, the angular velocity signal data adopts a wheel speed sensor of the automobile, and only a scheme of adding a device circuit for changing the wheel speed corresponding to the working state of the brake lamp on the aspect of a control module is adopted, so that the method is easy to realize and has low cost.
Drawings
Fig. 1 is a block diagram of an intelligent automobile brake light system provided in embodiment 1.
Fig. 2 is a functional block diagram of a control module of the intelligent automobile brake light system provided in embodiment 1.
Detailed Description
The invention is further described below, but not limited thereto, with reference to the following examples and the accompanying drawings.
Example 1
An intelligent automobile brake light system is shown in fig. 1 and fig. 2, and comprises a brake light, a control module, a wheel speed acquisition module and a brake pedal signal sensor; the brake signal output end of the brake pedal signal sensor and the wheel angular speed signal output end of the wheel speed acquisition module are connected with the signal input end of the control module, and the output end of the control module is connected with the brake lamp; the control module carries out data processing on the wheel angular speed acquired by the wheel speed acquisition module, calculates the current intensity of the brake lamp and controls the brightness of the brake lamp according to the current intensity.
The wheel speed acquisition module of the embodiment acquires angular speed data of a vehicle, and the wheel speed sensor is an electromagnetic sensing wheel speed sensor designed with an electromagnetic induction coil, wherein a signal adopts level intensity, namely electric potential transmitted by the wheel speed sensor, the electric potential of the signal forms loop current, and the current change forms magnetic fields with different change intensities, because E ═ L ([ delta ] I/Δ t), and I ═ Δ Φ/Δ t)/R; under the scheme that the signal output by the wheel speed sensor is electromotive force, the change rate of the wheel speed corresponds to the changed magnetic flux.
According to the intelligent automobile brake lamp system, different brake lamps are displayed according to the change speed of the actual speed, and a better warning effect is achieved. The change of the brightness of the brake lamp along with the change rate of the reduction of the vehicle speed can be realized, the higher the acceleration is, the higher the brightness is, and therefore the change condition of the speed of the front vehicle can be really reflected by the warning performance of the intelligent brake lamp. The more rapid the brake, the larger the lamp brightness, the vehicle speed change rate after the brake is stopped is 0, and the brake lamp brightness is the lowest at the moment, so that the situation that the brake lamp is too bright when waiting for a signal lamp is similar, and particularly the light pollution to a rear vehicle caused by rainy night at night can be avoided.
Example 2
According to embodiment 1, an intelligent automobile brake light system is provided, which is characterized in that:
the wheel speed sensor is a Hall effect type wheel speed sensor or a photoelectric type wheel speed sensor.
Example 3
According to embodiment 1, an intelligent automobile brake light system is provided, which is characterized in that:
the wheel speed acquisition module acquires angular velocity data through any one of a vehicle computer (ECU), a vehicle body electronic stability system (ESP), an anti-lock braking system (ABS) and an emergency brake warning system (ESS). The angular speed data can be conveniently acquired, the vehicle speed change is truly fed back, and the brake lamp change is judged.
Example 4
The working method of the intelligent automobile brake light system provided by the embodiment 1 comprises the following processes:
when the brake pedal is stepped on, the brake pedal signal sensor transmits a brake signal to the control module, and then the brake lamp is triggered to be turned on; the wheel speed acquisition module acquires a wheel angular speed omega and transmits the wheel angular speed omega to the control module, and the control module calculates an angular acceleration a: a is Δ ω/Δ t, Δ t represents a time variation, and Δ ω represents a variation of the wheel angular velocity ω within Δ t; the control module calculates the working current I of the brake lamp according to the angular acceleration a1From the power formula P ═ I1*U1＝I1R2, P represents power, U1The operating voltage of the brake light is indicated, and R represents the resistance of the brake light, so that the power of the brake light, i.e. the brightness of the brake light, can be changed by changing the current.
The control module calculates the working current I of the brake lamp according to the angular acceleration a1The method specifically comprises the following steps: i is1＝I0+α*I0*A(I)，
In the formula (I), I1Indicating the operating current of the brake light, I0The current required for maintaining the lowest brightness warning of the brake lamp is shown, a represents angular acceleration, and A is a coefficient. The coefficient A controls the working current not to exceed the maximum working current of the brake lamp under the maximum braking angular acceleration of the vehicle.
In the braking process, when the angular acceleration alpha is less than 0, the larger the angular acceleration is, the larger the intensity of the output current of the brake lamp is; the faster the real speed change of the vehicle is, the more sudden the braking is actually, the higher the output current intensity of the brake lamp is, and the higher the brightness of the brake lamp is;
when the red light is on, and the angular acceleration alpha is 0 when the brake is pressed for a long time, the output current intensity of the brake light is the lowest constant value, the lowest brightness of the brake light is maintained, and the rear vehicle is warned that the front vehicle is in the brake state.
The control module adopts a single chip microcomputer or a PLC to judge the brake signal and the angular speed signal and program and control the line control;
in this embodiment, a single chip microcomputer with the model of STC12C5408AD or a PLC with the model of S7-300 is used to determine the brake signal and the angular velocity signal, and program control is performed on the line control. The single chip microcomputer of the type has low cost.
Claims (7)
1. An intelligent automobile brake lamp system is characterized by comprising a brake lamp, a control module, a wheel speed acquisition module and a brake pedal signal sensor; the brake signal output end of the brake pedal signal sensor and the wheel angular speed signal output end of the wheel speed acquisition module are connected with the signal input end of the control module, and the output end of the control module is connected with the brake lamp; the control module carries out data processing on the wheel angular speed acquired by the wheel speed acquisition module, calculates the current intensity of the brake lamp and controls the brightness of the brake lamp according to the current intensity.
2. The intelligent vehicle brake lamp system of claim 1, wherein the wheel speed obtaining module obtains the angular velocity of the wheel through any one of a wheel speed sensor, a traveling computer, a vehicle body electronic stability system, an anti-lock braking system and an emergency braking warning system.
3. The intelligent vehicle brake lamp system of claim 2, wherein the wheel speed sensor is any one of an electromagnetic sensing type wheel speed sensor, a hall effect type wheel speed sensor, and a photoelectric type wheel speed sensor.
4. The method for operating the intelligent automobile brake light system as claimed in any one of claims 1 to 3, wherein the process is as follows:
when the brake pedal is stepped on, the brake pedal signal sensor transmits a brake signal to the control module, and then the brake lamp is triggered to be turned on; the wheel speed acquisition module acquires a wheel angular velocity omega and transmits the wheel angular velocity omega to the control module, and the control module calculates an angular acceleration a: a is Δ ω/Δ t, Δ t represents a time variation, and Δ ω represents a variation of the wheel angular velocity ω within Δ t; the control module calculates the working current I of the brake lamp according to the angular acceleration a1From the power formula P ═ I1*U1＝I1R2, P represents power, U1The operating voltage of the brake light is indicated, and R represents the resistance of the brake light, so that the power of the brake light, i.e. the brightness of the brake light, can be changed by changing the current.
5. The method as claimed in claim 4, wherein the control module calculates the brake lamp operating current I from the angular acceleration a1The method specifically comprises the following steps: i is1＝I0+a*I0*A(I)，
In the formula (I), I1Indicating the operating current of the brake light, I0Warning station for indicating maintaining minimum brightness of brake lampThe current demand, a represents the angular acceleration, and a is a coefficient.
6. The working method of the intelligent automobile brake light system as claimed in claim 4, wherein the control module adopts a single chip microcomputer or a PLC to judge the brake signal and the angular velocity signal and to perform programming control on the line control.
7. The intelligent automobile brake light system working method as claimed in claim 6, wherein a single chip microcomputer with model STC12C5408AD is adopted to judge the brake signal and the angular velocity signal and program control the line control.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010811936.8A CN114074600A (en) | 2020-08-13 | 2020-08-13 | Intelligent automobile brake lamp system and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010811936.8A CN114074600A (en) | 2020-08-13 | 2020-08-13 | Intelligent automobile brake lamp system and working method thereof |
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| CN114074600A true CN114074600A (en) | 2022-02-22 |
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| CN101456377A (en) * | 2008-12-30 | 2009-06-17 | 奇瑞汽车股份有限公司 | High stand brake lamp for grading lightening through vehicle body controller |
| JP2011068295A (en) * | 2009-09-28 | 2011-04-07 | Autonetworks Technologies Ltd | Brake lamp control device |
| CN103747571A (en) * | 2013-12-25 | 2014-04-23 | 浙江吉利控股集团有限公司 | Vehicle speed based brake lamp automatic control method and control apparatus |
| CN105339209A (en) * | 2013-07-22 | 2016-02-17 | 株式会社Truwin | Method of controlling zero point of signal output value from stop lamp switch and stop lamp switch using the same |
| CN105599671A (en) * | 2016-03-28 | 2016-05-25 | 张凯文 | Intelligent signal light for vehicle |
| CN107284347A (en) * | 2017-05-16 | 2017-10-24 | 中国矿业大学 | A kind of method that utilization brake lamp quickly distinguishes braking strength |
| CN109263539A (en) * | 2018-07-23 | 2019-01-25 | 赵文庆 | Vehicle emergency brake early warning system and method |
| CN111267721A (en) * | 2020-02-26 | 2020-06-12 | 常州工学院 | LED brake lamp suitable for human eye visual characteristics |
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2020
- 2020-08-13 CN CN202010811936.8A patent/CN114074600A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101456377A (en) * | 2008-12-30 | 2009-06-17 | 奇瑞汽车股份有限公司 | High stand brake lamp for grading lightening through vehicle body controller |
| JP2011068295A (en) * | 2009-09-28 | 2011-04-07 | Autonetworks Technologies Ltd | Brake lamp control device |
| CN105339209A (en) * | 2013-07-22 | 2016-02-17 | 株式会社Truwin | Method of controlling zero point of signal output value from stop lamp switch and stop lamp switch using the same |
| CN103747571A (en) * | 2013-12-25 | 2014-04-23 | 浙江吉利控股集团有限公司 | Vehicle speed based brake lamp automatic control method and control apparatus |
| CN105599671A (en) * | 2016-03-28 | 2016-05-25 | 张凯文 | Intelligent signal light for vehicle |
| CN107284347A (en) * | 2017-05-16 | 2017-10-24 | 中国矿业大学 | A kind of method that utilization brake lamp quickly distinguishes braking strength |
| CN109263539A (en) * | 2018-07-23 | 2019-01-25 | 赵文庆 | Vehicle emergency brake early warning system and method |
| CN111267721A (en) * | 2020-02-26 | 2020-06-12 | 常州工学院 | LED brake lamp suitable for human eye visual characteristics |
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