CN108657064A - Taillight brightness regulating system and method based on light triggering and image procossing - Google Patents
Taillight brightness regulating system and method based on light triggering and image procossing Download PDFInfo
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- CN108657064A CN108657064A CN201810468828.8A CN201810468828A CN108657064A CN 108657064 A CN108657064 A CN 108657064A CN 201810468828 A CN201810468828 A CN 201810468828A CN 108657064 A CN108657064 A CN 108657064A
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- image procossing
- image
- light
- pilot controller
- automobile
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Classifications
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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
-
- 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
- B60Q2400/00—Special features or arrangements of exterior signal lamps for vehicles
- B60Q2400/10—Electro- or photo- luminescent surfaces, e.g. signalling by way of electroluminescent strips or panels
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
The present invention discloses a kind of taillight brightness regulating system and method based on light triggering and image procossing, a current regulator is concatenated on the power supply line of automobile brake lamp, the current regulator is controlled by pilot controller, it is connected with photosensitive sensor and automobile data recorder on the pilot controller, the pilot controller also connects automobile ECU by CAN bus and extracts the brake signal in CAN bus, the photosensitive sensor is used to receive the high beam flash signal of rear car and triggers the pilot controller extracts current image from the automobile data recorder, pilot controller carries out the electric current output situation that image procossing is obtained light weakening coefficient and controlled current regulator using the coefficient according to current image.Its effect is：Circuit structure is simple, installs and easy to control, and according to the congestion in road situation that driving recording is shot, taillight brightness can cause to damage to reduce with automatic adjusument to the eyesight of rear car driver.
Description
Technical field
The present invention relates to automotive electronic technologies, specifically, being that a kind of taillight based on light triggering and image procossing is bright
Spend regulating system and method.
Background technology
Automobile tail light is the indispensable element in vehicle-mounted electrical system, is mainly used for rearward vehicles or pedestrians prompt vehicle fortune
Row state, existing automobile tail light are usually two states, when opening light one is night, prompt front to exist by taillight
Vehicle；Another kind is, by highlighted brake lamp, to prompt rear front vehicles to slow down or stop when trampling, prevent car rear-end.
Above-mentioned design can actually realize the information exchange between fore-aft vehicle, but with urban road increasingly congestion, more next
The personal seriousness for realizing lights of vehicle pollution of more drivers, in existing major automobile vendor, in order to embody
The noble quality of automotive quality, Lighting Design is also more highlighted, in short distance in vehicle driving process, driver is difficult to avoid that front
The strong taillight light-illuminating of vehicle is travelled with vehicle for a long time, driver sight's fatigue is easy to cause, to cause traffic thing
Therefore.
When the defect of the prior art：Automobile tail light intensity of light mostly uses greatly lasting hi-bright mode, and there is no according to vehicle
Travel speed and rear car following distance are adaptively adjusted, to which the driver to rear closely with vehicle traveling causes to regard
Power injures.
Invention content
In view of the deficiencies of the prior art, the object of the present invention is to provide it is a kind of based on light triggering and image procossing taillight
Brightness control system, the system can short distance with vehicle when driving, by rear car flash high beam trigger front truck light tune
Function is saved, the current driving road conditions acquired in position recorder, the brightness of the adjustment brake lamp of adaptability, to reduction pair are passed through
The eyesight of rear driver injures.
In order to achieve the above objectives, specific technical solution of the present invention is as follows：
A kind of taillight brightness regulating system based on light triggering and image procossing, key are：In automobile brake lamp
Power supply line on concatenate a current regulator, which is controlled by pilot controller, in auxiliary control
Photosensitive sensor and automobile data recorder are connected on device, the pilot controller also connects automobile ECU by CAN bus and extracts
Brake signal in CAN bus, the photosensitive sensor are used to receive the high beam flash signal of rear car and trigger the auxiliary
Controller extracts current image from the automobile data recorder, and pilot controller carries out image procossing according to current image and obtains lamp
Light weakening coefficient simultaneously exports situation using the electric current of coefficient control current regulator.
Further, the photosensitive sensor is mounted on automobile tail, the high beam flash signal for receiving rear car.
Further, the photosensitive sensor is attached on the LED lamp bead mounting plate of brake lamp.
Further, the pilot controller controls the supply current of automobile brake lamp by PWM.
Further, the pilot controller is by being wirelessly connected the automobile data recorder.
During researching and developing above system, the invention also provides it is a kind of based on light triggering and image procossing taillight
Brightness adjusting method follows the steps below：
S1：Start, established standards duty ratio d0, weakening coefficient c=1；
S2：Judge whether to receive brake signal, if do not received, enter S3, if received, enters S4；
S3：Current strength, and return to step S2 are controlled by duty ratio d=0；
S4：Current strength is controlled by duty ratio d=c*d0, and enters step S5；
S5：Judge whether to receive rear car high beam flash signal, if received, enters step S6, otherwise enter step
S7；
S6：Automobile data recorder current image is obtained, and weakening coefficient c=c ' is updated by image procossing the data obtained, so
Return to step S2 cycles execute afterwards；
S7：Whether interval time that judges to brake is more than threshold value, if it does, then return to step S1, otherwise return to step S2
Cycle executes.
Optionally, in step S5 when photosensitive sensor continuously receives rear car distance light modulating signal twice or more than twice,
Then be judged as rear car driver prompt need weaken light, pilot controller by extract automobile data recorder present image, and
Judge following distance data by image procossing, is then based on following distance update weakening coefficient.
Optionally, weakening coefficient is updated to be as follows：
S61：Judge to whether there is goal-selling object in present image, if it is present calculating goal-selling object current
Shared area ratio is p in image1, if it does not exist, then setting area ratio as p1=0；
S62：Weakening coefficient c ' is calculated in the following way；
Wherein p2For under standard following distance state, goal-selling object is in image
In shared area ratio.
Optionally, the goal-selling object is the car plate of front truck or preceding tail-light.
The present invention remarkable result be：Circuit structure is simple, installs and easy to control, can directly utilize onboard electrical system
Existing brake signal and the traffic information of automobile data recorder acquisition control taillight light in system, according to congestion in road
Serious conditions, taillight brightness can with automatic adjusument, to reduce the eyesight of rear car driver is caused to damage, in addition, row
The picture extraction of vehicle recorder is triggered based on rear car distance light modulating signal, is reduced data transmission and the difficulty of processing, is based on
Image procossing obtains the situation of target item so as to judge the jam situation of road conditions, and reliable ginseng is provided for light reduction
According to foundation.
Description of the drawings
Fig. 1 is the schematic block circuit diagram of the present invention；
Fig. 2 is the structural schematic diagram of brake lamp in the specific embodiment of the invention；
Fig. 3 is the control flow chart of the present invention.
Specific implementation mode
Specific embodiment and working principle of the present invention will be described in further detail below in conjunction with the accompanying drawings.
As Figure 1-Figure 2, a kind of taillight brightness regulating system based on light triggering and image procossing, in braking automobile
A current regulator is concatenated on the power supply line of lamp, which is controlled by pilot controller, is controlled in the auxiliary
Photosensitive sensor and automobile data recorder are connected on device processed, the pilot controller also connects automobile ECU by CAN bus and carries
The brake signal in CAN bus, the photosensitive sensor is taken to be used to receive the high beam flash signal of rear car and trigger described auxiliary
Controller is helped to extract current image from the automobile data recorder, pilot controller carries out image procossing according to current image and obtains
Light weakening coefficient simultaneously exports situation using the electric current of coefficient control current regulator.
In the specific implementation, current regulator can directly be serially connected in automobile brake lamp power interface and automobile brake lamp it
Between power cord on, photosensitive sensor can be directly installed on automobile tail, can also directly be attached to brake lamp as shown in Figure 2
LED lamp bead mounting plate on, white circle represents LED lamp bead in figure, and black circles represent photosensitive sensor, the brake of the left and right sides
One group of photosensitive sensor is respectively set in car light, even if rear car light is not directed at the front truck tailstock completely, by pulling high beam,
Photosensitive sensor in front truck also can normal induction to the flashing signal of rear car, lamp dimmer is by judging whether the company of receiving
The continuous strong illumination being switched fast twice determines the need for adjustment lamplight brightness, and pilot controller is direct by CAN bus
Brake signal is extracted, can be according to different products using wired or wireless connection for automobile data recorder, system is in former vehicle
On the basis of, additional pilot controller, without doing excessive improvement to former vehicle control circuit and control program, for vehicle
Market for refitting, application are very convenient.
Current regulator can be controlled by PWM, and the power supply state on brake lamp power interface can keep original control
Molding formula disclosure satisfy that being adaptively adjusted for lamplight brightness after current regulator carries out current limliting adjusting.
When specific control, carried out according to method as shown in Figure 3, specially：
S1：Start, established standards duty ratio d0, weakening coefficient c=1；
S2：Judge whether to receive brake signal, if do not received, enter S3, if received, enters S4, here
Brake signal is can directly to be extracted by CAN bus；
S3：Current strength, and return to step S2 are controlled by duty ratio d=0；
S4：Current strength is controlled by duty ratio d=c*d0, and enters step S5；
S5：Judge whether to receive rear car high beam flash signal, if received, enters step S6, otherwise enter step
S7；
S6：Automobile data recorder current image is obtained, and weakening coefficient c=c ' is updated by image procossing the data obtained, so
Return to step S2 cycles execute afterwards；
S7：Whether interval time that judges to brake is more than threshold value, if it does, then return to step S1, otherwise return to step S2
Cycle executes.
In step S5 when photosensitive sensor continuously receives rear car distance light modulating signal twice or more than twice, then it is judged as
Rear car driver prompt needs to weaken light, and pilot controller passes through image by extracting the present image of automobile data recorder
Processing judges following distance data, is then based on following distance update weakening coefficient.
Update weakening coefficient is as follows：
S61：Judge to whether there is goal-selling object in present image, if it is present calculating goal-selling object current
Shared area ratio is p in image1, if it does not exist, then setting area ratio as p1=0；
S62：Weakening coefficient c ' is calculated in the following way；
Wherein p2For under standard following distance state, goal-selling object is in image
In shared area ratio.
According to the position that different automobile data recorders is installed, the goal-selling object can select the car plate or front truck of front truck
Taillight can be analyzed and counted to the object in image captured by automobile data recorder in conjunction with existing image processing techniques
It calculates, if front has no goal-selling object or goal-selling object farther out, in image without vehicle or front vehicles standoff distance
Shared area is than relatively small in present image, and when rear car pair is dodged, front truck can be braked by relieving accelerates speed to draw
The distance of rear car is opened, rear car can also avoid the above problem by surmounting front truck, therefore weakening coefficient is in p1≤p2In the case of,
It does not need to adjust.
Brake lamp puzzlement is often in the case of congestion in road, and front truck can not both accelerate to pull open spacing, and rear car is not also square
Just lane change or surmount, for road vehicle at a distance of relatively close, automobile data recorder just can clearly obtain the tailstock image of front truck at this time,
By select front truck car plate or preceding tail-light as object, can obtain mesh under standard state by systematic training and test
Information of the object in graphic interface is marked, spacing is remoter, and proportion is smaller in the picture for object, and spacing is closer, and object exists
Shared ratio is bigger in image, therefore, in p1＞ p2When, by adjusting weakening coefficient c'=1-p1, can make brake lamp
Corresponding adjustment is done in brightness, to reduce the vision puzzlement to rear car driver.
By using foregoing circuit system and control method, automobile brake lamp can be according to condition of road surface in rear car high beam
Signal interaction under realize adaptability adjust, once vehicle restore normally travel state when, taillight brightness can restore automatically again, both
Meet the function of normally travel brake alarming, and avoids closely effectively ensuring with the puzzlement caused by rear car driver when vehicle
Road traffic driving safety.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, it will be understood by those of ordinary skill in the art that：It still may be used
To modify to the technical solution recorded in previous embodiment, either which part or all technical features are equal
It replaces；And these modifications or replacements, the model for technical solution of the embodiment of the present invention that it does not separate the essence of the corresponding technical solution
It encloses, should all cover in the claim of the present invention and the range of specification.
Claims (9)
1. a kind of taillight brightness regulating system based on light triggering and image procossing, it is characterised in that：In automobile brake lamp
A current regulator is concatenated on power supply line, which is controlled by pilot controller, in the pilot controller
On be connected with photosensitive sensor and automobile data recorder, the pilot controller also connects automobile ECU by CAN bus and extracts
Brake signal in CAN bus, the photosensitive sensor are used to receive the high beam flash signal of rear car and trigger the auxiliary
Controller extracts current image from the automobile data recorder, and pilot controller carries out image procossing according to current image and obtains lamp
Light weakening coefficient simultaneously exports situation using the electric current of coefficient control current regulator.
2. the taillight brightness regulating system according to claim 1 based on light triggering and image procossing, it is characterised in that：
The photosensitive sensor is mounted on automobile tail, the high beam flash signal for receiving rear car.
3. the taillight brightness regulating system according to claim 1 or 2 based on light triggering and image procossing, feature exist
In：The photosensitive sensor is attached on the LED lamp bead mounting plate of brake lamp.
4. the taillight brightness regulating system according to claim 1 based on light triggering and image procossing, it is characterised in that：
The pilot controller controls the supply current of automobile brake lamp by PWM.
5. the taillight brightness regulating system according to claim 1 based on light triggering and image procossing, it is characterised in that：
The pilot controller is by being wirelessly connected the automobile data recorder.
6. it is a kind of based on light triggering and image procossing taillight brightness adjusting method, it is characterised in that according to the following steps into
Row：
S1：Start, established standards duty ratio d0, weakening coefficient c=1；
S2：Judge whether to receive brake signal, if do not received, enter S3, if received, enters S4；
S3：Current strength, and return to step S2 are controlled by duty ratio d=0；
S4：Current strength is controlled by duty ratio d=c*d0, and enters step S5；
S5：Judge whether to receive rear car high beam flash signal, if received, enters step S6, otherwise enter step S7；
S6：Automobile data recorder current image is obtained, and weakening coefficient c=c ' is updated by image procossing the data obtained, is then returned
Step S2 cycles are returned to execute；
S7：Whether interval time that judges to brake is more than threshold value, if it does, then return to step S1, otherwise return to step S2 is recycled
It executes.
7. the taillight brightness adjusting method according to claim 6 based on light triggering and image procossing, it is characterised in that：
In step S5 when photosensitive sensor continuously receives rear car distance light modulating signal twice or more than twice, then it is judged as that rear car drives
Member's prompt needs to weaken light, and pilot controller is judged by extracting the present image of automobile data recorder by image procossing
Following distance data are then based on following distance update weakening coefficient.
8. the taillight brightness adjusting method based on light triggering and image procossing described according to claim 6 or 7, feature exist
In updating weakening coefficient and be as follows：
S61：Judge to whether there is goal-selling object in present image, if it is present calculating goal-selling object in present image
In shared area ratio be p1, if it does not exist, then setting area ratio as p1=0；
S62：Weakening coefficient c ' is calculated in the following way；
Wherein p2For under standard following distance state, goal-selling object institute in the picture
The area ratio accounted for.
9. the taillight brightness adjusting method according to claim 8 based on light triggering and image procossing, which is characterized in that
The goal-selling object is the car plate of front truck or preceding tail-light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810468828.8A CN108657064B (en) | 2018-05-16 | 2018-05-16 | Tail lamp brightness adjusting system and method based on light triggering and image processing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810468828.8A CN108657064B (en) | 2018-05-16 | 2018-05-16 | Tail lamp brightness adjusting system and method based on light triggering and image processing |
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| CN108657064A true CN108657064A (en) | 2018-10-16 |
| CN108657064B CN108657064B (en) | 2020-03-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110053548A (en) * | 2019-04-29 | 2019-07-26 | 山东交通职业学院 | A kind of automobile brake lamp control system and control method |
| CN111806232A (en) * | 2020-07-23 | 2020-10-23 | 南京恒天领锐汽车有限公司 | Strategy and system for preventing instantaneous blindness of driver in driving process |
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| CN108657064B (en) | 2020-03-17 |
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