CN107380053B - Vehicle-mounted lighting device, night vision system, vehicle and night vision lighting control method thereof - Google Patents

Vehicle-mounted lighting device, night vision system, vehicle and night vision lighting control method thereof Download PDF

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CN107380053B
CN107380053B CN201610329168.6A CN201610329168A CN107380053B CN 107380053 B CN107380053 B CN 107380053B CN 201610329168 A CN201610329168 A CN 201610329168A CN 107380053 B CN107380053 B CN 107380053B
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illumination
vehicle
visibility
module
lighting
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CN107380053A (en
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邱欣周
刘国宁
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BYD Semiconductor Co Ltd
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BYD Co Ltd
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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
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/06—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle
    • B60Q1/08—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle automatically
    • B60Q1/085—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle automatically due to special conditions, e.g. adverse weather, type of road, badly illuminated road signs or potential dangers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
    • B60R2300/80—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement
    • B60R2300/804—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement for lane monitoring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
    • B60R2300/80—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement
    • B60R2300/8053—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement for bad weather conditions or night vision

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Multimedia (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

The invention discloses a vehicle-mounted lighting device, a night vision system, a vehicle and a night vision lighting control method thereof, wherein the vehicle-mounted lighting device comprises: a lighting module; the visibility detection module is used for detecting the visibility of the current running environment of the vehicle; and the control module is respectively connected with the visibility detection module and the illumination module, and is used for calculating the illumination power of the illumination module according to the visibility of the current running environment of the vehicle and controlling the illumination module to illuminate with the illumination power so as to enable the shooting device of the vehicle to acquire road condition image information within a preset distance range. According to the vehicle-mounted lighting device, the lighting power is controlled according to the visibility of the current running environment of the vehicle, so that the shooting device can obtain road condition image information within a preset distance range under different visibility conditions, the perspective effect of a night vision system of the vehicle is kept under different visibility conditions, the safety of the vehicle is improved, and the driving experience is improved.

Description

Vehicle-mounted lighting device, night vision system, vehicle and night vision lighting control method thereof
Technical Field
The invention relates to the technical field of vehicles, in particular to a vehicle-mounted lighting device, a night vision system, a vehicle and a night vision lighting control method thereof.
Background
The attention on the healthy and safe trip makes people pay more and more attention to the traffic safety. According to the statistical display of the running condition data of expressways of various countries in the world, the low visibility has the greatest harm to the road traffic safety under all severe meteorological conditions. In the fields of security monitoring, automobiles, off-road, and the like, a near-infrared night vision system in the related art becomes an effective way of monitoring and increasing a visual range, and night vision illumination is an indispensable constituent part of the near-infrared night vision system, in which laser is increasingly applied to illumination of the near-infrared night vision system due to its high brightness and collimation. However, in the related art, the illumination control method of the near-infrared night vision system is single under different weather conditions, and the illumination effect is not good, so that improvement is needed.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, an object of the present invention is to provide a vehicle-mounted lighting device, which controls lighting power according to visibility of a current driving environment of a vehicle, so that a camera of the vehicle can obtain road condition image information within a preset distance range under different visibility, thereby maintaining a perspective effect of a night vision system of the vehicle under different visibility, improving safety of the vehicle, and improving driving experience.
A second object of the invention is to propose a night vision system.
A third object of the invention is to propose a vehicle.
A fourth object of the invention is to propose a night vision lighting control method of a vehicle.
In order to achieve the above object, a vehicle-mounted lighting device according to an embodiment of a first aspect of the present invention includes: a lighting module; the visibility detection module is used for detecting the visibility of the current running environment of the vehicle; the control module is respectively connected with the visibility detection module and the illumination module, and is used for calculating the illumination power of the illumination module according to the visibility of the current running environment of the vehicle and controlling the illumination module to illuminate with the illumination power so as to enable the shooting device of the vehicle to acquire road condition image information within a preset distance range.
According to the vehicle-mounted lighting device provided by the embodiment of the invention, the visibility of the current running environment of the vehicle is detected by the visibility detection module, the control module calculates the lighting power of the lighting module according to the visibility of the current running environment of the vehicle and controls the lighting module to perform lighting with the calculated lighting power, so that the shooting device can obtain road condition image information within a preset distance range under different visibility conditions, the perspective effect of a night vision system of the vehicle is kept under different visibility conditions, the safety of the vehicle is improved, and the driving experience is improved.
In order to achieve the above object, a night vision system of an embodiment of the second aspect of the invention includes the vehicle-mounted illumination device of the embodiment of the first aspect of the invention; the shooting device is used for acquiring road condition image information within a preset distance range; and the display device is used for displaying the road condition image information.
According to the night vision system provided by the embodiment of the invention, the vehicle-mounted lighting device outputs corresponding lighting power according to the visibility of the current running environment of the vehicle, so that the shooting device can obtain road condition image information within a preset distance range under different visibility conditions, and the display device displays the road condition image information obtained by the shooting device, thereby ensuring that the night vision system can keep the same perspective effect under different visibility conditions.
To achieve the above object, a vehicle according to an embodiment of the third aspect of the present invention includes the night vision system according to the embodiment of the second aspect of the present invention.
According to the vehicle provided by the embodiment of the invention, the same perspective effect can be obtained under different visibility conditions through the night vision system, so that the driving experience is improved, and the safety is improved.
In order to achieve the above object, a night vision illumination control method of a vehicle according to a fourth aspect of the present invention includes the steps of: detecting the visibility of the current running environment of the vehicle; acquiring the lighting power of the vehicle according to the visibility of the running environment of the vehicle; and controlling an illumination module of the vehicle to illuminate with the illumination power so that a shooting device of the vehicle acquires road condition image information within a preset distance range.
According to the night vision illumination control method of the vehicle, the visibility of the current running environment of the vehicle is detected, the illumination power of the illumination module is calculated according to the visibility of the current running environment of the vehicle, the illumination module is controlled to illuminate with the calculated illumination power, and therefore the shooting device of the vehicle can obtain road condition image information within a preset distance range under different visibility, the perspective effect of a night vision system of the vehicle is kept under different visibility, the safety of the vehicle is improved, and the driving experience is improved.
Drawings
FIG. 1 is a schematic illustration of an effective illumination area of a night vision system of the related art when visibility is good;
FIG. 2 is a schematic illustration of a night vision system of the related art with effective illumination areas for poor visibility;
FIG. 3 is a block diagram of an in-vehicle lighting apparatus according to one embodiment of the present invention;
FIG. 4 is a schematic view of a night vision system in accordance with a specific embodiment of the present invention;
FIG. 5 is a schematic view of a night vision system according to another embodiment of the present invention;
FIG. 6 is a block schematic diagram of a night vision system in accordance with one embodiment of the present invention;
FIG. 7 is a flow chart of a night vision lighting control method of a vehicle according to one embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the related art, the near-infrared night vision system usually uses a near-infrared laser for illumination, and the illumination control manner is relatively single, for example, the illumination intensity is generally a fixed intensity. The weather conditions encountered when the vehicle runs are complex, and when the vehicle runs under different severe weather conditions, the performance of the near-infrared night vision system is greatly different due to the illumination control mode. Visibility, which means the luminous flux of black body radiation at 2700K, attenuates the path length traversed to an initial value of 5% in the atmosphere, is the greatest hazard to road traffic safety in all adverse weather conditions.
The near-infrared night vision system in the related art can be applied in the case of good visibility, but when the visibility is poor, such as heavy fog or sand-dust weather, the perspective of the night vision system is significantly reduced, and the "perspective" effect is greatly reduced. Particularly, in a dense fog state, the visibility is poor, the air humidity is high, and water drops are settled on the road surface, so that the road surface is wet, and the road adhesion coefficient is reduced. Under the same vehicle speed condition at night, under the two conditions of good visibility and poor visibility, the working distance of the night vision system is different greatly (as shown in fig. 1 and fig. 2), the effective illumination area is obviously reduced under the condition of poor visibility, the braking distance of the vehicle is increased at the moment, and the driving experience of the vehicle is reduced.
In order to solve the above problems, the present invention proposes a vehicle-mounted lighting device, a night vision system, a vehicle, and a night vision lighting control method of the vehicle.
The following describes an in-vehicle lighting device, a night vision system, a vehicle, and a night vision lighting control method thereof according to an embodiment of the invention, with reference to the drawings.
Fig. 3 is a block diagram of an in-vehicle illumination apparatus according to an embodiment of the present invention. As shown in fig. 3, the in-vehicle illumination device 100 according to the embodiment of the present invention includes: a lighting module 10, a visibility detection module 20 and a control module 30.
In one embodiment of the invention, the lighting module 10 is a near-infrared semiconductor laser lamp.
Specifically, the near-infrared semiconductor laser lamp emits near-infrared laser light to illuminate the vehicle.
The visibility detection module 20 is used for detecting the visibility of the current driving environment of the vehicle.
Specifically, the visibility detection module 20 may be a visibility detector, and is configured to detect visibility of a current driving environment of the vehicle and provide the detected visibility to the control module 3030.
The control module 30 is respectively connected to the visibility detection module 20 and the lighting module 10, and the control module 30 is configured to calculate lighting power of the lighting module 10 according to visibility of a current driving environment of the vehicle, and control the lighting module 10 to perform lighting with the lighting power, so that the shooting device 200 of the vehicle obtains road condition image information within a preset distance range.
Specifically, the control module 30 calculates the lighting power of the lighting module 10 according to the visibility detected by the visibility detection module 20, and controls the lighting module 10 to illuminate at the calculated lighting power. The vehicle-mounted lighting device 100, the camera 200 and the display device 300 form a night vision system 1000 of the vehicle, and the control module 30 controls the lighting module 10 to illuminate with the calculated illumination power, so that the camera 200 can shoot road condition image information of the vehicle and provide the road condition image information to the driver through the display device 300, and therefore when the vehicle is in environments with different visibility, the night vision system 1000 can provide images within the same distance range for the driver, for example, objects at 200m can be visible under different visibility.
In one embodiment of the invention, controlThe system module 30 is used for: obtaining actual scene illumination E 'corresponding to visibility greater than preset threshold value'0And obtaining the atmospheric spectral transmittance tau according to the visibility of the current running environment of the vehicle1And according to the actual scene illumination E 'corresponding to the situation that the visibility is greater than the preset threshold value'0And atmospheric spectral transmittance tau1The equivalent illuminance E corresponding to the illumination module 10 is obtained, and the illumination power of the illumination module 10 is calculated according to the equivalent illuminance E corresponding to the illumination module 10 and the area S of the target illumination surface.
As described in detail below.
First, the Koschmieder (costimede) visibility equation is:
where R denotes visibility, ε denotes contrast threshold, L denotes perspective thickness, τ1Indicating the atmospheric spectral transmittance.
Then, the atmospheric spectral transmittance obtained from the costimede visibility equation is:
FIG. 4 is a schematic view of a night vision system in accordance with one embodiment of the present invention. As shown in fig. 4, in a low visibility condition, the complexity of atmospheric transmission causes scattering, absorption, etc. of laser light propagating therein, so that the illumination power of the laser light is attenuated with the transmission distance, and then, to reach targets at the same distance, the illumination power required is different under different visibility conditions. In practical situation, the minimum illumination E of the target illumination surface is determined according to the illumination field size and the spectrum matching coefficient of the shooting device1Calculated by the following formula:
wherein E is0Representing standard photographsDegree, τ1Denotes the atmospheric spectral transmittance,. tau2Denotes the spectral transmittance of the photographing mode device, ρ denotes the reflectance of the irradiated object,which indicates the relative aperture of the lens in the camera and c the actual contrast.
Specifically, empirically, it is generally considered that the actual sensed illuminance (i.e., E) of the photographing device (e.g., CCD camera)1) Good imaging quality can be achieved only by reaching 10 times of the minimum photosensitive illumination intensity marked by the CCD camera, and then E can be calculated according to the formula (3)0Further, based on the spectral responsivity δ of the light wave emitted from the illumination module 10 by the CCD camera, the actual scene illuminance E 'corresponding to good visibility (i.e. visibility is greater than a preset threshold, for example, the preset threshold is 2000 m) can be obtained'0Wherein E 'is calculated according to the following formula'0：
E'0＝E0/δ， (4)
Where δ represents the spectral responsivity of the imaging device to the light waves emitted by the illumination module 10.
Further, when the visibility is R, the equivalent illuminance E corresponding to the lighting module 10 is calculated according to the following formula:
the control module 30 can calculate the equivalent illuminance E corresponding to the lighting module 10 according to the above formula:
wherein, E'0Is the actual scene illumination intensity, tau, corresponding to the visibility greater than the preset threshold value1The atmospheric spectral transmittance is, E is equivalent illumination corresponding to the lighting module 10, R is visibility of the current driving environment of the vehicle, E is a contrast threshold, and L is a perspective thickness.
Further, the air conditioner is provided with a fan,the actually required radiant flux can be obtained according to the light flux conversion formula and the spectral responsivity of the shooting device to the light wave
The lighting power of the lighting module 10 can thus be derived:
wherein, P0Indicating the illumination power of the illumination module 10, E the equivalent illumination corresponding to the illumination module 10, S the area of the target illumination surface, δ the spectral responsivity of the light wave of the imaging device, KmK is the optical coupling ratio of the illumination module 10 for the absolute spectral optical efficiency of the camera under photopic conditions.
Then, combining the above equations (6) and (8), the control module 30 calculates the illumination power of the illumination module 10 according to the following equation:
wherein, P0The lighting power of the lighting module 10, R is the visibility of the current driving environment of the vehicle, epsilon is the contrast threshold, L is the perspective thickness, S is the area of the target lighting surface, delta is the spectral responsivity of the light wave of the camera, KmTo obtain the absolute spectral light efficiency of the camera under photopic conditions, k is the light coupling ratio of the illumination module 10.
In one embodiment of the present invention, the control module 30 is further configured to: the illumination angle b of the illumination module 10 is controlled as a function of the field angle a of the camera, wherein 0.7 a < b < a.
For example, as shown in fig. 5, the field angle of the imaging device is 4 °, the illumination angle of the illumination module 10 is 3 °, the illumination effectiveness can be improved, and a good observation of the focused image area can be ensured.
The vehicular illumination apparatus of the embodiment of the invention is described below with reference to a specific example.
As shown in fig. 5, the image capturing device 200 is a black and white CCD camera, and has a field angle of 4 °, a photosensitive size of 8.47mm × 6.35mm, a minimum photosensitive illumination of 0.0003lx, a lens focal length of 120mm, and a relative aperture of 0.0003lxLens spectral transmittance tau2The reflectance ρ of the irradiation target is 0.5 and the actual contrast c is 0.3, respectively, 0.8 and 0.3; the illumination module 10 is a near-infrared semiconductor laser lamp, the illumination angle of which is 3 °, and the wavelength of the emitted light is 808 nm.
Empirically, it is generally accepted that the actual exposure illumination (i.e., E) of a camera (e.g., a CCD camera) is1) The imaging quality is better only when the minimum photosensitive illumination of the CCD camera mark is 10 times, and under the condition of good visibility (for example, the visibility is more than 2000 meters), the corresponding actual scene illumination E'0Atmospheric spectral transmittance τ1And 0.8, the minimum illumination requirement of the target illumination surface under normal illumination can be calculated.
Is prepared from formula (3)The following can be obtained: e00.6 lx. Since the spectral responsivity δ of the imaging device to the 808nm light wave is 0.4, the actual scene illuminance E 'is obtained when the visibility is good'0＝0.6/0.4＝1.5lx。
According to the size (photosensitive width 6.35mm and lens focal length 120mm) of a CCD photosensitive chip in the shooting device, the radius of a scene which can be imaged when the distance L is 200m can be calculated as follows:
then, the area of the target illumination surface obtained from the scene radius is:
S＝π×r2＝87.9m2。
the absolute spectral light efficiency K of the camera under photopic conditions is also knownm683lm/w, the optical coupling ratio k of the illumination module 10 is 0.85, and the contrast threshold is 0.02, then the required output power (i.e. illumination power) of the semiconductor laser can be obtained:
according to the above formula, the lighting power of the lighting module 10 in the vehicle lighting device of the embodiment of the invention is shown in table 1 below, in order to achieve the goal of 200m under different visibility conditions.
TABLE 1
Then, the control module 30 can calculate the lighting power of the lighting module 10 according to the visibility detected by the visibility detecting module 20, so as to achieve the purpose of adaptive lighting, so that the perspective effect of the night vision system can be maintained under different visibility conditions. Through the vehicle-mounted lighting device provided by the embodiment of the invention, under the condition of low visibility, the lighting power of the lighting module 10 can be automatically adjusted by the control module 30, so that the near-infrared night vision laser lighting can still reach the same distance under different meteorological conditions, namely, the working distance of a night vision system under low visibility is increased, the vehicle-mounted lighting device is beneficial to improving the driving safety in foggy days, and can prevent traffic accidents in foggy days, such as continuous rear-end collisions, front-collision fault vehicles and the like.
According to the vehicle-mounted lighting device provided by the embodiment of the invention, the visibility of the current running environment of the vehicle is detected by the visibility detection module, the control module calculates the lighting power of the lighting module according to the visibility of the current running environment of the vehicle and controls the lighting module to perform lighting with the calculated lighting power, so that the shooting device can obtain road condition image information within a preset distance range under different visibility, the perspective effect of a night vision system of the vehicle is kept under different visibility, the safety of the vehicle is improved, and the driving experience is improved.
In order to realize the embodiment, the invention also provides a night vision system.
FIG. 6 is a block schematic diagram of a night vision system in accordance with one embodiment of the present invention. As shown in fig. 6, a night vision system 1000 of an embodiment of the present invention includes an in-vehicle illumination device 100, a camera device 200, and a display device 300.
The vehicle-mounted lighting device 100 has already been described in detail in the foregoing embodiments, and is not described herein again.
The camera 200 is configured to obtain road condition image information within a preset distance range.
The display device 300 is used for displaying the road condition image information acquired by the camera 200.
Specifically, the lighting power of the lighting module is adjusted by the vehicle-mounted lighting device 100 according to the visibility, so that the photographing device 200 can obtain the road condition image information within the preset distance range in different visibility conditions, and the display device 300 displays the road condition image information within the preset distance range photographed by the photographing device 200 for the driver to use.
According to the night vision system, the vehicle-mounted lighting device outputs corresponding lighting power according to the visibility of the current driving environment of the vehicle, so that the shooting device can obtain road condition image information within a preset distance range under different visibility conditions, and the display device displays the road condition image information obtained by the shooting device, so that the night vision system can keep the same perspective effect under different visibility conditions.
In order to realize the embodiment, the invention further provides a vehicle. The vehicle includes a night vision system of an embodiment of the present invention.
According to the vehicle provided by the embodiment of the invention, the same perspective effect can be obtained under different visibility conditions through the night vision system, so that the driving experience is improved, and the safety is improved.
In order to realize the embodiment, the invention further provides a night vision illumination control method of the vehicle.
FIG. 7 is a flow chart of a night vision lighting control method of a vehicle according to one embodiment of the invention. As shown in fig. 7, a night vision illumination control method for a vehicle according to an embodiment of the present invention includes the steps of:
and S1, detecting the visibility of the current running environment of the vehicle.
For example, visibility of the current running environment of the vehicle is detected by a visibility detector.
And S2, acquiring the lighting power of the vehicle according to the visibility of the running environment of the vehicle.
In one embodiment of the invention, the obtaining of the lighting power of the vehicle according to the visibility of the running environment of the vehicle comprises the following steps: acquiring the corresponding actual scene illumination when the visibility is greater than a preset threshold value; obtaining atmospheric spectral transmittance according to the visibility of the current driving environment of the vehicle; obtaining equivalent illumination corresponding to the lighting module according to the actual scene illumination and the atmospheric spectral transmittance corresponding to the visibility larger than the preset threshold; and calculating the illumination power of the illumination module according to the equivalent illumination corresponding to the illumination module and the area of the target illumination surface.
In one embodiment of the present invention, the equivalent illumination corresponding to the lighting module is calculated according to equation (6).
In one embodiment of the invention, the illumination power of the illumination module is calculated according to equation (9).
And S3, controlling the lighting module of the vehicle to illuminate with the illumination power, so that the shooting device of the vehicle acquires the road condition image information within the preset distance range.
In one embodiment of the invention, the illumination module is a near-infrared semiconductor laser lamp.
Specifically, the illumination power of the illumination module is calculated according to the visibility detected by the visibility detector, and the illumination module is controlled to illuminate at the calculated illumination power. The vehicle-mounted lighting device, the shooting device and the display device form a night vision system of the vehicle, the lighting module is controlled to illuminate with the calculated lighting power, so that the shooting device shoots road condition image information of the vehicle within a preset distance range and provides the road condition image information for a driver through the display device, and therefore when the vehicle is in environments with different visibility, the night vision system can provide images within the same distance range for the driver, for example, targets at 200m can be visible under different visibility.
In one embodiment of the present invention, a night vision lighting control method of a vehicle further includes: and controlling an illumination angle b of the illumination module according to the field angle a of the shooting device, wherein 0.7 a < b < a. This can improve the effectiveness of the illumination while ensuring a good view of the image area being addressed.
It should be noted that, in the night vision illumination control method for the vehicle according to the embodiment of the present invention, the undeployed portions (such as formula derivation, example, and the like) may refer to the corresponding portions of the vehicle-mounted illumination device according to the previous embodiment, and are not further detailed herein.
According to the night vision illumination control method of the vehicle, disclosed by the embodiment of the invention, the visibility of the current running environment of the vehicle is detected, the illumination power of the illumination module is calculated according to the visibility of the current running environment of the vehicle, and the illumination module is controlled to illuminate with the calculated illumination power, so that a shooting device of the vehicle can obtain road condition image information within a preset distance range under different visibility, the perspective effect of a night vision system of the vehicle is kept under different visibility, the safety of the vehicle is improved, and the driving experience is improved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (11)

1. An in-vehicle lighting device characterized by comprising:
a lighting module;
the visibility detection module is used for detecting the visibility of the current running environment of the vehicle;
the control module is respectively connected with the visibility detection module and the illumination module, and is used for calculating the illumination power of the illumination module according to the visibility of the current running environment of the vehicle and controlling the illumination module to illuminate with the illumination power so as to enable the shooting device of the vehicle to acquire road condition image information within a preset distance range,
the control module is specifically used for obtaining actual scene illumination E 'corresponding to the situation that the visibility is greater than a preset threshold value'0And obtaining the atmospheric spectral transmittance tau according to the visibility of the current running environment of the vehicle1And according to the corresponding actual scene illumination E 'when the visibility is greater than a preset threshold value'0And the atmospheric spectral transmittance τ1And acquiring equivalent illumination E corresponding to the illumination module, and calculating the illumination power of the illumination module according to the equivalent illumination E corresponding to the illumination module and the area S of the target illumination surface.
2. The vehicle lighting device according to claim 1, wherein the control module calculates the equivalent illuminance corresponding to the lighting module according to the following formula:
wherein, E'0The corresponding actual scene illumination, tau, when the visibility is larger than a preset threshold value1And the atmospheric spectral transmittance is, E is equivalent illumination corresponding to the lighting module, R is visibility of the current driving environment of the vehicle, epsilon is a contrast threshold value, and L is perspective thickness.
3. The in-vehicle lighting device according to claim 2, wherein the control module calculates the lighting power of the lighting module according to the following formula:
wherein, P0The lighting power of the lighting module is R, the visibility of the current running environment of the vehicle is epsilon, the contrast threshold value is epsilon, the perspective thickness is L, the area of the target lighting surface is S, the light wave spectral response rate of the shooting device is delta, and KmK is the optical coupling ratio of the illumination module for the absolute spectral optical efficiency of the camera under photopic conditions.
4. The in-vehicle lighting device according to claim 1, wherein the control module is further configured to:
and controlling an illumination angle b of the illumination module according to the field angle a of the shooting device, wherein 0.7 a < b < a.
5. The vehicular illumination device according to claim 1, wherein the illumination module is a near-infrared semiconductor laser lamp.
6. A night vision system, comprising:
the vehicular illumination apparatus according to any one of claims 1 to 5;
the shooting device is used for acquiring road condition image information within a preset distance range; and
and the display device is used for displaying the road condition image information.
7. A vehicle characterized by comprising a night vision system as claimed in claim 6.
8. A night vision illumination control method for a vehicle, characterized by comprising the steps of:
detecting the visibility of the current running environment of the vehicle;
obtaining the lighting power of the vehicle according to the visibility of the current running environment of the vehicle, wherein the obtaining the lighting power of the vehicle according to the visibility of the current running environment of the vehicle further comprises: acquiring the corresponding actual scene illumination when the visibility is greater than a preset threshold value; obtaining atmospheric spectral transmittance according to the visibility of the current driving environment of the vehicle; obtaining equivalent illumination corresponding to the lighting module according to the actual scene illumination corresponding to the visibility larger than the preset threshold value and the atmospheric spectral transmittance; calculating the illumination power of the illumination module according to the equivalent illumination corresponding to the illumination module and the area of the target illumination surface;
and controlling an illumination module of the vehicle to illuminate with the illumination power so that a shooting device of the vehicle acquires road condition image information within a preset distance range.
9. The night vision illumination control method for a vehicle according to claim 8, wherein the equivalent illuminance corresponding to the illumination module is calculated according to the following formula:
wherein, E'0The corresponding actual scene illumination, tau, when the visibility is larger than a preset threshold value1And E is the atmospheric spectral transmittance, E is the equivalent illumination corresponding to the lighting module, R is the visibility of the current running environment of the vehicle, epsilon is a contrast threshold value, and L is the perspective thickness.
10. The night vision illumination control method for a vehicle according to claim 9, wherein the illumination power of the illumination module is calculated according to the following formula:
wherein, P0The lighting power of the lighting module is R, the visibility of the current running environment of the vehicle is epsilon, the contrast threshold value is epsilon, the perspective thickness is L, the area of the target lighting surface is S, the light wave spectral response rate of the shooting device is delta, and KmK is the optical coupling ratio of the illumination module for the absolute spectral optical efficiency of the camera under photopic conditions.
11. The night vision lighting control method for a vehicle of claim 8 further comprising:
and controlling an illumination angle b of the illumination module according to the field angle a of the shooting device, wherein 0.7 a < b < a.
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