CN108657064B - Tail lamp brightness adjusting system and method based on light triggering and image processing - Google Patents
Tail lamp brightness adjusting system and method based on light triggering and image processing Download PDFInfo
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- CN108657064B CN108657064B CN201810468828.8A CN201810468828A CN108657064B CN 108657064 B CN108657064 B CN 108657064B CN 201810468828 A CN201810468828 A CN 201810468828A CN 108657064 B CN108657064 B CN 108657064B
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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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- 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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- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
The invention discloses a tail lamp brightness adjusting system and method based on light triggering and image processing.A current regulator is connected in series with a power supply line of an automobile brake lamp and is controlled by an auxiliary controller, a photosensitive sensor and a driving recorder are connected on the auxiliary controller, the auxiliary controller is also connected with an automobile ECU through a CAN bus and extracts a brake signal on the CAN bus, the photosensitive sensor is used for receiving a far-reaching lamp flashing signal of a rear automobile and triggering the auxiliary controller to extract a current picture from the driving recorder, and the auxiliary controller carries out image processing according to the current picture to obtain a light weakening coefficient and controls the current output condition of the current regulator by utilizing the coefficient. The effect is as follows: the circuit structure is simple, the installation and the control are convenient, and the brightness of the tail lamp can be adjusted in a self-adaptive mode according to the road congestion condition shot by the driving record, so that the damage to the vision of a driver of a rear vehicle is reduced.
Description
Technical Field
The invention relates to the automobile electronic technology, in particular to a tail lamp brightness adjusting system and method based on light triggering and image processing.
Background
The automobile tail lamp is an essential element in a vehicle-mounted electrical system and is mainly used for prompting the running state of a vehicle to a backward vehicle or a pedestrian; and the other is that when the driver steps on, the driver is prompted to decelerate or stop the vehicle in front of the rear part through a highlighted brake lamp, so that the rear-end collision of the vehicle is prevented.
The design can really realize information interaction between front and rear vehicles, but along with increasingly congested urban roads, more and more drivers can realize the severity of vehicle light pollution by themselves, in the conventional various automobile manufacturers, in order to embody the high and expensive quality of the vehicles, the light design is also more highlighted, and in the process of driving with the vehicles in a short distance, the drivers are difficult to avoid strong tail lamp light irradiation of the front vehicles, and the drivers are easy to cause visual fatigue due to long-time driving with the vehicles, so that traffic accidents are caused.
The defects of the prior art are as follows: the automobile tail lamp light intensity is mostly in a continuous highlight mode, and self-adaptive adjustment is not carried out according to the vehicle running speed and the following distance of the rear vehicle, so that vision injury is caused to a driver who runs with the rear vehicle in a short distance.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a tail lamp brightness adjusting system based on light triggering and image processing, which can trigger the light adjusting function of a front vehicle through a rear vehicle flickering high beam when a following vehicle runs at a short distance, and adaptively adjust the brightness of a brake lamp through the current running road condition acquired by a travel recorder, thereby reducing the visual injury to a driver behind.
In order to achieve the purpose, the invention adopts the following specific technical scheme:
the utility model provides a tail lamp brightness control system based on light triggers and image processing which the key lies in: the automobile brake light control system is characterized in that a current regulator is connected in series with a power supply line of an automobile brake light and is controlled by an auxiliary controller, a photosensitive sensor and an automobile data recorder are connected to the auxiliary controller, the auxiliary controller is further connected with an automobile ECU through a CAN bus and extracts brake signals on the CAN bus, the photosensitive sensor is used for receiving far-reaching light flickering signals of a rear automobile and triggering the auxiliary controller to extract a current picture from the automobile data recorder, and the auxiliary controller performs image processing according to the current picture to obtain a light weakening coefficient and controls the current output condition of the current regulator by utilizing the light weakening coefficient.
Further, the photosensitive sensor is installed at the tail of the automobile and used for receiving a high beam flashing signal of a rear automobile.
Further, the photosensitive sensor is attached to the LED lamp bead mounting plate of the brake lamp.
Further, the auxiliary controller controls the supply current of the automobile brake lamp through PWM.
Further, the auxiliary controller is connected with the automobile data recorder through wireless connection.
In the process of researching and developing the system, the invention also provides a tail lamp brightness adjusting method based on light triggering and image processing, which is carried out according to the following steps:
s1: initially, a standard duty cycle d0 is set, and the weakening coefficient c is 1;
s2: judging whether a braking signal is received, if not, entering S3, and if so, entering S4;
s3: controlling the current intensity according to the duty ratio d being 0, and returning to the step S2;
s4: controlling the current intensity according to the duty ratio d-c-d 0, and entering step S5;
s5: judging whether a rear vehicle high beam flashing signal is received, if so, entering a step S6, otherwise, entering a step S7;
s6: acquiring a current picture of the automobile data recorder, updating the weakening coefficient c ═ c' through data obtained by image processing, and then returning to the step S2 for circular execution;
s7: and judging whether the braking interval time exceeds a threshold value, if so, returning to the step S1, and otherwise, returning to the step S2 for circular execution.
Optionally, in step S5, when the photosensitive sensor receives the high beam signal of the following vehicle for two or more times continuously, it is determined that the driver of the following vehicle is prompted to weaken the light, the auxiliary controller determines the following distance data by extracting the current picture of the driving recorder and by image processing, and then updates the weakening coefficient based on the following distance.
Optionally, the specific steps of updating the weakening coefficient are as follows:
s61: judging whether a preset target object exists in the current picture, if so, calculating the area ratio of the preset target object in the current picture as p1If not, setting the area ratio as p1＝0；
S62: the weakening coefficient c' is calculated in the following manner;
Optionally, the preset target object is a license plate of a front vehicle or a tail lamp of the front vehicle.
The invention has the following remarkable effects: the circuit structure is simple, the installation and the control are convenient, the road condition information that can directly utilize current brake signal and vehicle event data recorder to gather in the on-vehicle electrical system is controlled tail lamp light, according to the serious condition that the road blocks up, tail lamp luminance can self-adaptation regulation, thereby reduce and lead to the fact the damage to car rear driver's eyesight, in addition, vehicle event data recorder's picture is drawed and is based on car rear distance light signal trigger, the degree of difficulty of data transmission and processing has been reduced, thereby the condition that obtains target object based on image processing can judge the jam condition of road condition, provide reliable reference basis for light weakening.
Drawings
FIG. 1 is a schematic block diagram of the circuit of the present invention;
FIG. 2 is a schematic diagram of a brake light according to an embodiment of the present invention;
fig. 3 is a control flow diagram of the present invention.
Detailed Description
The following provides a more detailed description of the embodiments and the operation of the present invention with reference to the accompanying drawings.
As shown in fig. 1-2, a current regulator is connected in series with a power supply line of a brake light of an automobile, the current regulator is controlled by an auxiliary controller, a photosensitive sensor and a vehicle data recorder are connected to the auxiliary controller, the auxiliary controller is further connected to an automobile ECU through a CAN bus and extracts a brake signal on the CAN bus, the photosensitive sensor is used for receiving a far-reaching lamp flashing signal of a rear automobile and triggering the auxiliary controller to extract a current picture from the vehicle data recorder, and the auxiliary controller performs image processing according to the current picture to obtain a light weakening coefficient and controls a current output condition of the current regulator by using the light weakening coefficient.
In the specific implementation, the current regulator CAN be directly connected in series on a power supply line between a power supply interface of the automobile brake lamp and the automobile brake lamp, the photosensitive sensor CAN be directly installed at the tail of the automobile or directly attached to an LED lamp bead installation plate of the brake lamp as shown in FIG. 2, a white circle in the figure represents an LED lamp bead, a black circle represents a photosensitive sensor, a group of photosensitive sensors are respectively arranged in the brake lamps at the left side and the right side, even if the light of the rear lamp is not completely aligned with the tail of the front automobile, the light controller CAN normally sense the flash signal of the rear automobile by pulling the high beam lamp, the light controller determines whether the brightness of the light needs to be adjusted by judging whether the flash signal of the rear automobile is received by two times of continuous fast switching strong light irradiation, the auxiliary controller directly extracts the brake signal through a CAN bus, and the wire or wireless connection CAN be adopted, the system is additionally provided with the auxiliary controller on the basis of the original vehicle, the control circuit and the control program of the original vehicle do not need to be improved too much, and the system is very convenient to use for vehicle refitting markets.
The current regulator can be controlled through PWM, the power supply state on the power interface of the brake lamp can keep the original control mode, and the adaptability adjustment of the light brightness can be met after the current limiting adjustment is carried out through the current regulator.
Specifically, the control is performed according to the method shown in fig. 3, specifically:
s1: initially, a standard duty cycle d0 is set, and the weakening coefficient c is 1;
s2: judging whether a brake signal is received, if not, entering S3, if so, entering S4, wherein the brake signal CAN be directly extracted through a CAN bus;
s3: controlling the current intensity according to the duty ratio d being 0, and returning to the step S2;
s4: controlling the current intensity according to the duty ratio d-c-d 0, and entering step S5;
s5: judging whether a rear vehicle high beam flashing signal is received, if so, entering a step S6, otherwise, entering a step S7;
s6: acquiring a current picture of the automobile data recorder, updating the weakening coefficient c ═ c' through data obtained by image processing, and then returning to the step S2 for circular execution;
s7: and judging whether the braking interval time exceeds a threshold value, if so, returning to the step S1, and otherwise, returning to the step S2 for circular execution.
In step S5, when the photosensor receives the high beam signal of the following vehicle for two or more times, it is determined that the driver of the following vehicle is prompted to weaken the light, the auxiliary controller determines the following distance data by extracting the current picture of the drive recorder and by image processing, and then updates the weakening coefficient based on the following distance.
The specific steps for updating the weakening coefficient are as follows:
s61: judging whether a preset target object exists in the current picture, if so, calculating the area ratio of the preset target object in the current picture as p1If not, setting the area ratio as p1＝0；
S62: the weakening coefficient c' is calculated in the following manner;
According to the position of the automobile data recorder installation of difference, predetermine the license plate or the preceding rear of a vehicle lamp that the target object can select the front car, combine current image processing technique, can carry out analysis and calculation to the target object in the image that the automobile data recorder was shot, if the place ahead does not have the vehicle or the place ahead vehicle is far away apart from the distance, do not have in the image and predetermine the target object, or predetermine the area ratio that the target object occupies in current picture relatively less, during the double flash of back car, the distance of back car can be pulled open to the front car through releasing the brake acceleration rate, the back car also can avoid above-mentioned problem through surmounting the front car, consequently, the coefficient of weakness is in p1≤p2In the case of (2), no adjustment is required.
The brake lamp troubles the situation that the front vehicle cannot accelerate to pull the distance and the rear vehicle cannot conveniently change or overtake under the condition of road congestion, the distance between the vehicles on the road is relatively short, the automobile data recorder can clearly acquire the images of the tail of the front vehicle, the license plate or the tail lamp of the front vehicle is selected as the target object, the information of the target object in the image interface in the standard state can be acquired through system training and testing, the farther the distance between the vehicles is, the smaller the proportion of the target object in the image is, the closer the distance between the vehicles is, the larger the proportion of the target object in the image is, and therefore, in the case of p, the distance between the vehicles is relatively short, the proportion of the1＞p2By adjusting the weakening coefficient c ═ 1-p1The brightness of the brake lamp can be correspondingly adjusted, thereby reducing the need for back lightingVisual annoyance to vehicle drivers.
By adopting the circuit system and the control method, the automobile brake lamp can realize adaptive adjustment under the signal interaction of the rear automobile high beam according to the road condition, once the automobile recovers the normal driving state, the brightness of the tail lamp can also automatically recover, the function of normal driving brake warning is met, the trouble caused by close-distance automobile following to a rear automobile driver is avoided, and the road traffic driving safety is effectively ensured.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not cause the essence of the corresponding technical solution to depart from the scope of the technical solution of the embodiments of the present invention, and are intended to be covered by the claims and the specification of the present invention.
Claims (9)
1. The utility model provides a tail lamp brightness control system based on light triggers and image processing which characterized in that: the automobile brake light control system is characterized in that a current regulator is connected in series with a power supply line of an automobile brake light and is controlled by an auxiliary controller, a photosensitive sensor and an automobile data recorder are connected to the auxiliary controller, the auxiliary controller is further connected with an automobile ECU through a CAN bus and extracts brake signals on the CAN bus, the photosensitive sensor is used for receiving far-reaching light flickering signals of a rear automobile and triggering the auxiliary controller to extract a current picture from the automobile data recorder, and the auxiliary controller performs image processing according to the current picture to obtain a light weakening coefficient and controls the current output condition of the current regulator by utilizing the light weakening coefficient.
2. A tail lamp brightness adjusting system based on light triggering and image processing as claimed in claim 1, characterized in that: the photosensitive sensor is arranged at the tail of the automobile and used for receiving a high beam flashing signal of a rear automobile.
3. A tail lamp brightness adjusting system based on light triggering and image processing as claimed in claim 1 or 2, characterized in that: the photosensitive sensor is attached to the LED lamp bead mounting plate of the brake lamp.
4. A tail lamp brightness adjusting system based on light triggering and image processing as claimed in claim 1, characterized in that: and the auxiliary controller controls the power supply current of the automobile brake lamp through PWM.
5. A tail lamp brightness adjusting system based on light triggering and image processing as claimed in claim 1, characterized in that: the auxiliary controller is connected with the automobile data recorder in a wireless mode.
6. A tail lamp brightness adjusting method based on light triggering and image processing, which adopts the adjusting system of claim 1, and is characterized by comprising the following steps:
s1: initially, a standard duty cycle d0 is set, and the weakening coefficient c is 1;
s2: judging whether a braking signal is received, if not, entering S3, and if so, entering S4;
s3: controlling the current intensity according to the duty ratio d being 0, and returning to the step S2;
s4: controlling the current intensity according to the duty ratio d-c-d 0, and entering step S5;
s5: judging whether a rear vehicle high beam flashing signal is received, if so, entering a step S6, otherwise, entering a step S7;
s6: acquiring a current picture of the automobile data recorder, updating the weakening coefficient c ═ c' through data obtained by image processing, and then returning to the step S2 for circular execution;
s7: and judging whether the braking interval time exceeds a threshold value, if so, returning to the step S1, and otherwise, returning to the step S2 for circular execution.
7. The method for adjusting brightness of tail light based on light triggering and image processing as claimed in claim 6, wherein: in step S5, when the photosensor receives the high beam signal of the following vehicle for two or more times, it is determined that the driver of the following vehicle is prompted to weaken the light, the auxiliary controller determines the following distance data by extracting the current picture of the drive recorder and by image processing, and then updates the weakening coefficient based on the following distance.
8. A method for adjusting brightness of tail light based on light trigger and image processing as claimed in claim 6 or 7, wherein the specific steps for updating the attenuation coefficient are as follows:
s61: judging whether a preset target object exists in the current picture, if so, calculating the area ratio of the preset target object in the current picture as p1If not, setting the area ratio as p1＝0；
S62: the weakening coefficient c' is calculated in the following manner;
9. The method for adjusting brightness of a tail lamp based on light triggering and image processing as claimed in claim 8, wherein the preset target is a license plate of a preceding vehicle or a tail lamp of the preceding vehicle.
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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 |
| CN112363439A (en) * | 2020-12-22 | 2021-02-12 | 深圳市富恒通科技有限公司 | Low-cost control module based on mobile phone light pulse control, beauty instrument and system thereof |
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| KR20130052957A (en) * | 2011-11-14 | 2013-05-23 | 현대자동차주식회사 | Apparatus and method for controlling brake lamp in vehicle |
| CN102815259B (en) * | 2012-08-07 | 2015-05-20 | 北京经纬恒润科技有限公司 | Regulation method for head lamps, device thereof and driver assistance system |
| CN204020699U (en) * | 2014-07-21 | 2014-12-17 | 北汽福田汽车股份有限公司 | The control system of vehicle and vehicle brake lamp |
| KR101646460B1 (en) * | 2015-04-15 | 2016-08-08 | 박경준 | Method and apparatus for automatically adjusting the backlight luminance of a vehicle |
| CN106114345B (en) * | 2016-08-02 | 2018-03-13 | 常州星宇车灯股份有限公司 | Intelligent lighting regulating system and its adjusting method based on image procossing |
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