CN110871733B - Vehicle brake lamp control method, device and system and readable storage medium thereof - Google Patents
Vehicle brake lamp control method, device and system and readable storage medium thereof Download PDFInfo
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- CN110871733B CN110871733B CN201810995040.2A CN201810995040A CN110871733B CN 110871733 B CN110871733 B CN 110871733B CN 201810995040 A CN201810995040 A CN 201810995040A CN 110871733 B CN110871733 B CN 110871733B
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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
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Abstract
The invention relates to the technical field of electric vehicle control, and provides a vehicle brake lamp control method, device and system and a machine readable storage medium. The vehicle brake lamp control method of the invention comprises the following steps: identifying a road condition on which the vehicle is currently traveling; when the road surface on which the vehicle runs currently is a bumpy road surface and the current acceleration of the vehicle is greater than a preset bumpy road surface acceleration threshold value A, controlling the vehicle brake lamp to be turned on, otherwise, controlling the vehicle brake lamp to be turned off; and when the road surface on which the vehicle runs currently is a non-bumpy road surface and the current acceleration of the vehicle is greater than a preset non-bumpy road surface acceleration threshold value B, controlling the vehicle brake lamp to be turned on, and otherwise, controlling the vehicle brake lamp to be turned off. The invention aims at the sliding energy recovery scene of the electric vehicle, and avoids the condition that the rear vehicle does not obtain signals in time to decelerate or brake due to the reduction of the speed of the electric vehicle during the sliding energy recovery, and finally traffic accidents are caused.
Description
Technical Field
The invention relates to the technical field of vehicle electric control, in particular to a vehicle brake lamp control method, a vehicle brake lamp control device, a vehicle brake lamp control system and a readable storage medium.
Background
As is well known, the vehicle reminds the rear vehicle of the current vehicle speed through a brake lamp signal, so that the distance between the front vehicle and the rear vehicle is kept in a safe range. The existing brake lamp control strategy controls the turn-on of a vehicle brake lamp by collecting a signal of a brake pedal, when the brake pedal is stepped on, the brake lamp is turned on, and when the brake pedal is not stepped on, the brake lamp is turned off.
However, in the electric vehicle, in order to improve the energy utilization rate and increase the driving range, the braking energy recovery and the coasting energy recovery become the standard configurations of the electric vehicle, when the electric vehicle enters the coasting energy recovery, the vehicle is in the deceleration state, the brake pedal is not pressed at this time, and according to the existing brake light control strategy, the brake light is not turned on, so that the rear vehicle may keep the vehicle speed unchanged, resulting in rear-end collision accidents.
Disclosure of Invention
In view of the above, the present invention is directed to a method for controlling a brake light of a vehicle to solve the above-mentioned technical problems.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle brake light control method, comprising: identifying a road condition on which the vehicle is currently traveling; if the road surface on which the vehicle runs currently is a bumpy road surface and the current acceleration of the vehicle is greater than a preset bumpy road surface acceleration threshold value A, controlling the vehicle brake lamp to be turned on, otherwise, controlling the vehicle brake lamp to be turned off; and if the road surface on which the vehicle runs currently is a non-bumpy road surface and the current acceleration of the vehicle is greater than a preset non-bumpy road surface acceleration threshold value B, controlling the vehicle brake lamp to be turned on, and otherwise, controlling the vehicle brake lamp to be turned off.
Further, the identifying the road surface condition on which the vehicle is currently running includes: respectively calculating the acceleration of each wheel according to the wheel speed of each wheel of the vehicle, then calculating the variance value of the acceleration of each wheel according to the acceleration of each wheel of the vehicle, further acquiring the maximum value in the variance value of the acceleration of each wheel, finally comparing the maximum value with the current vehicle speed corresponding to the current vehicle speed variance threshold value C, and if the maximum value is greater than the current vehicle acceleration variance threshold value C, judging that the current running road surface of the vehicle is a bumpy road surface; otherwise, the road surface on which the vehicle is currently running is determined to be a non-bumpy road surface.
Further, the bumpy road acceleration threshold a is different from the non-bumpy road acceleration threshold B, and the bumpy road acceleration threshold a is greater than the non-bumpy road acceleration threshold B.
Compared with the prior art, the vehicle brake lamp control method has the following advantages:
(1) the vehicle brake lamp control method is suitable for determining whether the vehicle is in a deceleration state currently by identifying the road surface condition and the wheel acceleration of the vehicle currently running when the electric vehicle recovers the sliding energy, so as to control the on or off of the vehicle brake lamp and ensure the driving safety.
(2) Compared with the acceleration obtained by directly using an acceleration sensor in the prior art, the vehicle brake lamp control method provided by the invention has the advantages that the obtained data is more accurate and stable, and the influence of the number or the position of passengers in the vehicle is avoided.
(3) The vehicle brake lamp control method selects the bumpy road acceleration threshold value and the non-bumpy road acceleration threshold value which accord with the rationality, so that the judgment result is accurate.
Another objective of the present invention is to provide a vehicle brake lamp control device to solve the above technical problems.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle brake light control apparatus comprising: the road surface identification module is used for identifying the current running road surface condition of the vehicle; the control module is used for controlling the vehicle brake lamp to be turned on when the road surface on which the vehicle runs currently is a bumpy road surface and the current acceleration of the vehicle is greater than a preset bumpy road surface acceleration threshold value A, otherwise, controlling the vehicle brake lamp to be turned off; and when the road surface on which the vehicle runs currently is a non-bumpy road surface and the current acceleration of the vehicle is greater than a preset non-bumpy road surface acceleration threshold value B, controlling the vehicle brake lamp to be turned on, and otherwise, controlling the vehicle brake lamp to be turned off.
Further, the road surface identification module includes: the first calculating unit is used for respectively calculating the acceleration of each wheel according to the wheel speed of each wheel of the vehicle; the second calculation unit is used for calculating the variance value of each wheel acceleration according to each wheel acceleration; the third calculation unit is used for acquiring the maximum value in the variance values of the accelerations of the wheels; and the judging unit is used for comparing the maximum value with a vehicle current acceleration variance threshold value C corresponding to the current vehicle speed, and if the maximum value is greater than the vehicle current acceleration variance threshold value C, judging that the road surface on which the vehicle runs currently is a bumpy road surface, otherwise, judging that the road surface on which the vehicle runs currently is a non-bumpy road surface.
Further, the bumpy road acceleration threshold a is different from the non-bumpy road acceleration threshold B, and the bumpy road acceleration threshold a is greater than the non-bumpy road acceleration threshold B.
Compared with the prior art, the vehicle brake lamp control device and the vehicle brake lamp control method have the same advantages, and are not repeated herein.
Another object of the present invention is to provide a vehicle brake light control system to solve the above technical problems.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle brake light Control system, comprising a Body controller (Body Control Module,
BCM), vehicle control unit, and vehicle body Electronic Stability Program (ESP). The ESP is used for acquiring and calculating wheel speed signals of each wheel of the vehicle and sending the signals to the whole vehicle controller; the vehicle controller comprises the vehicle brake lamp control device, is used for receiving wheel speed signals of each wheel from the ESP, generating a brake lamp lighting or extinguishing signal through the vehicle brake lamp control device, and sending the brake lamp lighting or extinguishing signal to the BCM; and the BCM is used for realizing the lighting or extinguishing of the brake lamp.
Further, the Vehicle controller is a Hybrid Control Unit (HCU) or a pure electric Vehicle (VCU).
Compared with the prior art, the vehicle brake lamp control system and the vehicle brake lamp control device have the same advantages, and are not described again.
Another object of the present invention is to provide a machine-readable storage medium to solve the above technical problems.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a machine-readable storage medium having instructions stored thereon for causing a controller to execute the vehicle brake light control method described above.
The machine-readable storage medium has the same advantages as the vehicle brake light control method described above over the prior art, and is not described herein again.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a method for controlling a brake light of a vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for identifying a road surface under control of a vehicle brake lamp according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the vehicle brake light control logic in a preferred embodiment of the present invention;
FIG. 4 is a schematic diagram of a vehicle brake light control apparatus according to an embodiment of the present invention;
FIG. 5 is a schematic view of a vehicle brake light road surface identification module according to an embodiment of the present invention; and
fig. 6 is a schematic diagram of a vehicle brake light control system according to an embodiment of the present invention.
Description of reference numerals:
1010. road surface identification module 1020 and control module
1011. First calculation unit 1012 and second calculation unit
1013. Third calculation unit 1014 and judgment unit
Detailed Description
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. In order to solve the technical problem of the present invention, it is necessary to determine whether the current vehicle speed of the vehicle is decelerating, and all the following embodiments relate to acceleration, which is a negative value, and therefore, the following description is made herein.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
An embodiment of the present invention provides a control method for a vehicle brake lamp, as shown in fig. 1, which may include the following steps:
s100, the road surface condition of the vehicle running at present is identified.
For example, as shown in fig. 2, the identifying the road surface condition on which the vehicle is currently running may include the steps of:
step S110, respectively calculating the acceleration of each wheel according to the wheel speed of each wheel of the vehicle.
The wheel speed of each wheel is obtained by monitoring the wheel speed of each wheel in real time through a speed sensor, the acceleration of each wheel refers to the ratio of the variation of different wheel speeds of the front wheel and the rear wheel to the time for the variation, and the acceleration calculation formula belongs to the technical common knowledge well known by the technical personnel in the field, so that the details are not repeated.
Step S120, calculating the variance value of each wheel acceleration according to the vehicle each wheel acceleration.
And step S130, acquiring the maximum value in the variance values of the accelerations of the wheels.
It should be noted that the variance is a measure for measuring the difference between the source data and the expected value, and when the variance is applied to the acceleration of each wheel of the vehicle, the variation range of the acceleration of each wheel of the vehicle can be effectively reflected. Therefore, if the variance value is smaller, the group of data is more stable, and the variation amplitude is low; otherwise, the group data is unstable and has high variation amplitude. Therefore, the maximum value in the variance values of the accelerations of the four wheels is selected as the variance value of the current acceleration of the vehicle, so as to indicate that the current acceleration of the vehicle is unstable and has a high variation amplitude, and represents the road condition on which the vehicle is currently running, namely, the bump condition.
Since the variance calculation formula belongs to the technical common knowledge well known to those skilled in the art, it is not described in detail.
Step S140, comparing the maximum value with a vehicle current acceleration variance threshold value C corresponding to the current vehicle speed, and if the maximum value is greater than the vehicle current acceleration variance threshold value C, determining that the road on which the vehicle runs currently is a bumpy road; otherwise, the road surface on which the vehicle is currently running is determined to be a non-bumpy road surface.
It should be noted that the vehicle current acceleration variance threshold C is obtained according to a current vehicle speed look-up table, where the table is a tabulation of a vehicle speed obtained through multiple real vehicle tests and the vehicle current acceleration variance threshold C at different vehicle speeds, and is used as a criterion for determining whether the vehicle is driving on a bumpy road surface, so that the maximum value needs to be compared with the vehicle current acceleration variance threshold C to determine whether the road surface on which the vehicle is driving is a bumpy road surface.
In the vehicle brake lamp control method, the road condition of the vehicle running at present is identified, and the acceleration is calculated by adopting the wheel speed of each wheel of the vehicle, so that compared with the acceleration directly obtained by an acceleration sensor in the prior art, the data obtained by the method is more accurate and stable, and is not influenced by the number or position of passengers in the vehicle.
S200, if the road surface on which the vehicle runs currently is a bumpy road surface and the current acceleration of the vehicle is greater than a preset bumpy road surface acceleration threshold value A, controlling the vehicle brake lamp to be turned on, otherwise, controlling the vehicle brake lamp to be turned off; and if the road surface on which the vehicle runs currently is a non-bumpy road surface and the current acceleration of the vehicle is greater than a preset non-bumpy road surface acceleration threshold value B, controlling the vehicle brake lamp to be turned on, and otherwise, controlling the vehicle brake lamp to be turned off.
The bumpy road acceleration threshold value A and the non-bumpy road acceleration threshold value B are obtained through multiple tests and calibration of a real vehicle, the values of the bumpy road acceleration threshold value A and the non-bumpy road acceleration threshold value B are different, and the former is larger than the latter. The current speed of the vehicle is the same regardless of the current road condition of the vehicle, i.e. the current road is a bumpy road or a non-bumpy road, and the current speed of the vehicle is the same. Therefore, under the condition that the current speed of the vehicle is the same, when the vehicle decelerates automatically when the road on which the vehicle runs is a bumpy road and decelerates automatically when the road on which the vehicle runs is a non-bumpy road, the current acceleration of the vehicle is different between the current acceleration of the vehicle on the bumpy road and the current acceleration of the vehicle on the non-bumpy road due to the fact that the speed stability of the vehicle is lower between the bumpy road and the non-bumpy road, and the current acceleration of the vehicle on the bumpy road is higher than that of the vehicle on the non-bumpy road.
When the electric vehicle is in the coasting energy recovery state, the vehicle brake lamp is controlled to be turned on or off according to the judgment method of the S200 no matter what road conditions the vehicle is currently driving on. For example, when the vehicle is in a coasting energy recovery state, if the road on which the vehicle is currently traveling is a bumpy road and the current acceleration of the vehicle is less than a preset bumpy road acceleration threshold value a, the vehicle brake lamp is turned off. Since the vehicle speed is decelerated slowly, that is, the acceleration is not significant, for a long time while the vehicle is in the coasting energy recovery, the rear vehicle is gradually adjusted appropriately according to the vehicle speed of the front vehicle without turning on the vehicle brake lamp.
Similarly, the road surface on which the vehicle is currently running is a non-bumpy road surface, and when the current acceleration of the vehicle is smaller than the preset non-bumpy road surface acceleration threshold B, the above conditions also exist, so the details are not repeated.
Corresponding to the basic steps shown in fig. 1 and fig. 2, fig. 3 is an exemplary vehicle brake light control logic designed by using the basic steps in the preferred embodiment of the present invention, as shown in fig. 3, specifically as follows:
and S1, calculating the acceleration of each wheel.
For example, for a conventional four-wheel vehicle, the wheel acceleration is calculated from the wheel speed of each wheel.
And S2, calculating the acceleration variance value of each wheel.
In step S1, a plurality of sets of acceleration values are calculated for each wheel of the conventional four-wheel automobile, and in order to better reflect the variation range of the acceleration of each wheel, variance calculation is performed on the plurality of sets of acceleration values for each wheel. The smaller the variance value is, the more stable the group of data is, and the change amplitude is low; otherwise, the group data is unstable and has high variation amplitude.
And S3, taking the maximum value of the variance values of the accelerations of each wheel, such as b. The maximum value is selected from the variance values of the accelerations of the four wheels, for example, the maximum value is b, and the maximum value is used as the variance value of the current acceleration of the vehicle, so that the current acceleration of the vehicle is unstable, the variation range is high, and the current acceleration represents the road condition on which the vehicle is currently running, namely the bumping condition.
S4, comparing the maximum value b with a current acceleration variance threshold value C of the vehicle, and if the maximum value b is larger than the current acceleration variance threshold value C of the vehicle, indicating that the current running road condition of the vehicle is a bumpy road; otherwise, the road condition of the vehicle currently running is a non-bumpy road;
the current acceleration variance threshold C of the vehicle is obtained by looking up a table according to the current vehicle speed and is used as a judgment basis for judging whether the vehicle runs on a bumpy road surface.
S5, when the road condition of the road is a bumpy road, comparing the current acceleration a of the vehicle with a preset bumpy road acceleration threshold A, and if the current acceleration a of the vehicle is greater than the bumpy road acceleration threshold A, lighting a brake lamp of the vehicle; otherwise, the vehicle brake lamp is turned off.
S6, when the road condition of the road is a non-bumpy road, comparing the current acceleration a of the vehicle with a preset non-bumpy road acceleration threshold B, and if the current acceleration a of the vehicle is greater than the non-bumpy road acceleration threshold B, lighting a brake lamp of the vehicle; otherwise, the vehicle brake lamp is turned off.
The current acceleration a of the vehicle is calculated according to the current speed of the vehicle and is filtered, so that the current acceleration of the vehicle is closer to the self-acceleration value of the vehicle. Compared with the prior art in which the current acceleration a of the vehicle or the acceleration of each wheel of the vehicle is measured directly by an acceleration sensor, the method for calculating the current acceleration a of the vehicle and the acceleration of each wheel of the vehicle is more stable and is not changed due to different numbers and positions of passengers of the vehicle.
The vehicle brake lamp control method provided by the embodiment of the invention aims to effectively control the on/off of the vehicle brake lamp no matter what road surface is in the current form when the electric vehicle is in sliding energy recovery, so as to guarantee the driving safety and avoid rear-end collision accidents.
Based on the same inventive idea as the vehicle brake lamp control method, the embodiment of the invention also provides a vehicle brake lamp control device.
As shown in fig. 4, the vehicle brake lamp control apparatus may include: a road surface recognition module 1010 for recognizing a road surface condition on which the vehicle is currently running, in a preferred embodiment, as shown in fig. 5, the road surface recognition module 1010 may include: a first calculation unit 1011 for calculating each wheel acceleration from the wheel speed of each wheel of the vehicle, respectively; a second calculation unit 1012 for calculating a variance value of each wheel acceleration based on the each wheel acceleration; a third calculation unit 1013 configured to obtain a maximum value of variance values of the accelerations of the respective wheels; and the judging unit 1014 is configured to compare the maximum value with a current vehicle acceleration variance threshold C corresponding to the current vehicle speed, and if the maximum value is greater than the variance threshold C, determine that the road on which the vehicle is currently driving is a bumpy road, otherwise, determine that the road on which the vehicle is currently driving is a non-bumpy road.
The control module 1020 is configured to control the vehicle brake lamp to be turned on when the current driving road of the vehicle is a bumpy road and the current acceleration of the vehicle is greater than a preset bumpy road acceleration threshold value a, and otherwise, control the vehicle brake lamp to be turned off; and the control unit is used for controlling the vehicle brake lamp to be turned on when the road surface on which the vehicle runs currently is a non-bumpy road surface and the current acceleration of the vehicle is greater than a preset non-bumpy road surface acceleration threshold value B, and otherwise, controlling the vehicle brake lamp to be turned off.
In a more preferred embodiment, the bumpy road acceleration threshold a is different from the non-bumpy road acceleration threshold B, and the bumpy road acceleration threshold a is greater than the non-bumpy road acceleration threshold B.
Here, other implementation details and effects of the vehicle brake lamp control device according to the embodiment of the present invention are the same as or similar to those of the vehicle brake lamp control method described above, and are not described herein again.
Based on the same invention idea as the vehicle brake light control method, the embodiment of the invention also provides a vehicle brake light control system.
As shown in fig. 6, the vehicle brake light control system may include: the vehicle braking system comprises a BCM, a vehicle control unit and an ESP, wherein the ESP is used for collecting and calculating wheel speed signals of each wheel of a vehicle and sending the wheel speed signals to the vehicle control unit, the vehicle control unit comprises the vehicle braking lamp control device and is used for receiving the wheel speed signals of each wheel and sending a braking lamp turning-on or turning-off signal to the BCM, the BCM realizes the turning-on or turning-off of the braking lamp, and the BCM, the vehicle control unit and the ESP are in signal transmission through a CAN bus.
When the ESP sends a current vehicle speed signal of the vehicle to the vehicle control unit, the vehicle control unit calculates the current acceleration of the vehicle according to the current vehicle speed of the vehicle and carries out filtering processing so as to ensure that the current acceleration signal of the vehicle is stable.
Meanwhile, the ESP sends wheel speed signals of current wheels of the vehicle to the vehicle control unit, a calculation unit in the vehicle control unit calculates acceleration of each wheel according to the current wheel speed of the vehicle, calculates a variance value of the acceleration of each wheel according to the wheel speed of each wheel, obtains a maximum value in the variance value of the acceleration of each wheel, a judgment unit in the vehicle control unit compares the maximum value with a current vehicle acceleration variance threshold value C corresponding to the current vehicle speed, judges whether the current running road surface of the vehicle is a bumpy road surface or not, controls whether a vehicle brake lamp is turned on or off or not, sends a vehicle brake lamp turning-on or turning-off signal to the BCM, and turns on or turns off the vehicle brake lamp after the BCM receives the signal.
The vehicle control unit may be an HCU or a VCU, which is not limited in the embodiments of the present invention.
Here, other implementation details and effects of the vehicle brake light control system according to the embodiment of the present invention are the same as or similar to those of the vehicle brake light control device described above, and are not described herein again.
The method provided by the embodiment of the invention can be completely developed from a software level, and the control strategy is written into a software program. Based on the characteristic, the embodiment of the invention also provides a machine-readable storage medium, and the machine-readable storage medium stores instructions for enabling a controller to execute the vehicle brake lamp control method in the embodiment. The controller may be, for example, a VCU, an HCU, or an independently configured DSP (Digital Signal Processor), for example.
Those skilled in the art will understand that all or part of the steps in the method according to the above embodiments may be implemented by a program, which is stored in a storage medium and includes several instructions to enable a single chip, a chip, or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A vehicle brake light control method, characterized by comprising:
identifying a road condition on which the vehicle is currently traveling;
if the road surface on which the vehicle runs currently is a bumpy road surface and the current acceleration of the vehicle is greater than a preset bumpy road surface acceleration threshold value A, controlling the vehicle brake lamp to be turned on, otherwise, controlling the vehicle brake lamp to be turned off; if the road surface on which the vehicle runs is a non-bumpy road surface and the current acceleration of the vehicle is greater than a preset non-bumpy road surface acceleration threshold value B, controlling the vehicle brake lamp to be turned on, otherwise, controlling the vehicle brake lamp to be turned off,
wherein the identifying a road surface condition on which the vehicle is currently traveling comprises:
respectively calculating the acceleration of each wheel according to the wheel speed of each wheel of the vehicle;
calculating the variance value of the acceleration of each wheel according to the acceleration of each wheel of the vehicle;
acquiring the maximum value in the variance values of the accelerations of the wheels;
comparing the maximum value with a vehicle current acceleration variance threshold value C corresponding to the current vehicle speed, and if the maximum value is greater than the vehicle current acceleration variance threshold value C, determining that the road on which the vehicle runs currently is a bumpy road; otherwise, the road surface on which the vehicle is currently running is determined to be a non-bumpy road surface.
2. A control method for a vehicular brake lamp according to claim 1, wherein the bumpy road acceleration threshold a is different from the non-bumpy road acceleration threshold B, and the bumpy road acceleration threshold a is greater than the non-bumpy road acceleration threshold B.
3. A vehicular brake lamp control apparatus, characterized by comprising:
the road surface identification module is used for identifying the current running road surface condition of the vehicle;
the control module is used for controlling the vehicle brake lamp to be turned on when the road surface on which the vehicle runs currently is a bumpy road surface and the current acceleration of the vehicle is greater than a preset bumpy road surface acceleration threshold value A, and otherwise, controlling the vehicle brake lamp to be turned off; and is used for controlling the vehicle brake lamp to be turned on when the road surface on which the vehicle runs is a non-bumpy road surface and the current acceleration of the vehicle is greater than a preset non-bumpy road surface acceleration threshold value B, otherwise, controlling the vehicle brake lamp to be turned off,
wherein, the road surface identification module includes:
the first calculating unit is used for respectively calculating the acceleration of each wheel according to the wheel speed of each wheel of the vehicle;
the second calculation unit is used for calculating the variance value of each wheel acceleration according to each wheel acceleration;
the third calculation unit is used for acquiring the maximum value in the variance values of the accelerations of the wheels;
the judging unit is used for comparing the maximum value with a vehicle current acceleration variance threshold value C corresponding to the current vehicle speed, and if the maximum value is larger than the vehicle current acceleration variance threshold value C, judging that the road where the vehicle runs currently is a bumpy road; and otherwise, judging that the road on which the vehicle runs currently is a non-bumpy road.
4. The vehicle brake lamp control device according to claim 3, wherein the bumpy road acceleration threshold A is different from the non-bumpy road acceleration threshold B, and the bumpy road acceleration threshold A is greater than the non-bumpy road acceleration threshold B.
5. A vehicle brake lamp control system is characterized by comprising a vehicle body controller BCM, a vehicle controller and a vehicle body electronic stability system ESP,
the ESP is used for acquiring and calculating wheel speed signals of each wheel of the vehicle and sending the signals to the whole vehicle controller;
the vehicle control unit comprising the vehicle brake lamp control device of any one of claims 3 or 4, and configured to receive the wheel speed signals from the ESP, generate a brake lamp on or off signal through the vehicle brake lamp control device, and transmit the brake lamp on or off signal to the BCM; and
and the BCM is used for realizing the turning on or turning off of the brake lamp.
6. The vehicle brake lamp control system according to claim 5, wherein the vehicle control unit is a hybrid vehicle control unit (HCU) or a pure electric Vehicle Control Unit (VCU).
7. A machine-readable storage medium having stored thereon instructions for causing a controller to execute the vehicle brake light control method of any one of claims 1 or 2.
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| CN201810995040.2A CN110871733B (en) | 2018-08-29 | 2018-08-29 | Vehicle brake lamp control method, device and system and readable storage medium thereof |
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| CN201810995040.2A CN110871733B (en) | 2018-08-29 | 2018-08-29 | Vehicle brake lamp control method, device and system and readable storage medium thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| AU426903B2 (en) * | 1967-02-23 | 1972-08-09 | Alexander Bryant Ensor | Improved deceleration and stoplight signalling means for motorcars andother vehicles |
| US5014167A (en) * | 1990-02-20 | 1991-05-07 | K. W. Muth Company, Inc. | Visual signaling apparatus |
| CN2915597Y (en) * | 2005-08-19 | 2007-06-27 | 郭艳霞 | Emergency brake signaling apparatus for automobile |
| 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 |
| CN202686102U (en) * | 2012-06-05 | 2013-01-23 | 北汽福田汽车股份有限公司 | Mounting rack for automobile rear combination lamp |
| CN102849009B (en) * | 2012-09-12 | 2016-01-20 | 江苏大学 | A kind of express highway rear-end impact early warning and protective system and control method |
| US20160046231A1 (en) * | 2014-08-14 | 2016-02-18 | Deere & Company | Vehicle deceleration warning system |
| CN105599671A (en) * | 2016-03-28 | 2016-05-25 | 张凯文 | Intelligent signal light for vehicle |
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