CN115962434B - Lighting equipment for tunnel anti-glare - Google Patents
Lighting equipment for tunnel anti-glare Download PDFInfo
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- CN115962434B CN115962434B CN202210114451.2A CN202210114451A CN115962434B CN 115962434 B CN115962434 B CN 115962434B CN 202210114451 A CN202210114451 A CN 202210114451A CN 115962434 B CN115962434 B CN 115962434B
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Abstract
The application relates to a lighting device for tunnel anti-glare, belongs to the technical field of optical lighting, and solves the problem of low driving safety caused by serious glare in tunnels in the prior art. The lighting equipment comprises a plurality of lamps which are symmetrically arranged at two sides of the tunnel; each lamp comprises a plurality of lighting modules which are arranged in a straight line; each lighting module comprises a lighting lamp and a beam adjuster; the light beam adjuster is used for adjusting the symmetrical light source generated by the illuminating lamp into an asymmetrical light source with unidirectional light emission, and the central light beam direction of the asymmetrical light source is consistent with the driving direction of the tunnel. The lighting equipment can effectively control the glare generated by the lighting lamp in the tunnel, and reduce the influence of the glare on a driver, so that the driving safety is improved.
Description
Technical Field
The application relates to the technical field of optical illumination, in particular to illumination equipment for tunnel anti-glare.
Background
The lighting system is an important component for ensuring the driving safety of the tunnel, and special research and standard establishment are carried out on the lighting of the tunnel as early as 60 th century. After 80 s, the countries around the world have successively gone out of tunnel illumination specifications; the design and construction of tunnel illumination are standardized, and traffic accidents are reduced. However, the lighting standard is designed for the traditional light source at present, mainly comprising a high-pressure sodium lamp, and along with the development of the LED lighting technology and the vigorous popularization of the ministry of national improvement and commission, the LED is gradually applied to the field of tunnel lighting, but still mainly comprising the replacement of the traditional lamp, mainly comprising the point-to-point replacement, and the individual replacement of the LED fluorescent lamp tube has unsatisfactory effect.
In the prior art, because the design of the illuminating lamp does not consider indexes such as visual limitation and glare index in a semi-closed space, especially for a spiral tunnel, a curved tunnel is different from a straight tunnel, the right front of the driver's visual field of the curved section is the outer side wall of the tunnel, target identification and judgment become important, if a traditional illuminating light source is adopted by an illuminating lamp of the front outer side wall, glare can be generated, the driver can not accurately identify the target under the glare, and further dangerous driving risks can be caused to a great extent.
Disclosure of Invention
In view of the above analysis, the present application aims to provide an anti-glare lighting device for a tunnel, so as to solve the problem that a driver cannot accurately identify a target or disturb the sight of the driver due to the glare generated by the conventional lighting device in the tunnel, thereby easily causing traffic accidents.
The application provides a lighting device for preventing glare of a tunnel, which comprises a plurality of lamps, wherein the lamps are symmetrically arranged at two sides of the tunnel;
each lamp comprises a plurality of lighting modules which are arranged in a straight line;
each lighting module comprises a lighting lamp and a beam adjuster;
the light beam adjuster is used for adjusting a symmetrical light source generated by the illuminating lamp into an asymmetrical light source capable of emitting light unidirectionally, and an included angle between the central light beam direction of the asymmetrical light source and the driving direction of the tunnel is an acute angle.
Further, the illuminating lamp is an LED.
Further, the beam adjuster is a lens group or a single curved lens.
Further, the lens group comprises three curved lenses which are overlapped from inside to outside, and a certain air space is arranged between every two adjacent curved lenses; the three curved lenses sequentially deflect the beam direction of the illuminating lamp to a certain angle towards the driving direction of the tunnel according to the sequence from inside to outside, and finally the symmetrical light source generated by the illuminating lamp is adjusted to be an asymmetrical light source with unidirectional light emission.
Further, the surface type structure of the three curved lenses was determined as follows: acquiring an asymmetric light distribution curve of each layer of curved lens; based on the light distribution curve, obtaining a mapping relation between incident light rays and emergent light rays on two sides of each layer of curved lens by using an annular energy method, and obtaining an emergent angle of each annular belt on the layer of curved lens based on the mapping relation; and determining the surface type structure of each curved lens according to the emergence angle.
Further, the surface type structure of the single-curved lens is determined as follows: acquiring an asymmetric light distribution curve of the single-curved lens; based on the light distribution curve, obtaining a mapping relation between incident light rays and emergent light rays on two sides of the single-curved lens by using an annular energy method, and obtaining an emergent angle of each annular zone on the single-curved lens based on the mapping relation; and determining the surface type structure of the single-curved lens according to the emergence angle.
Further, the lamp also comprises a lamp panel, wherein the lamp panel is a PCB, and the illuminating lamp and the beam regulator are arranged on the lamp panel; the lamp panel is provided with a groove, the bottom of the lens group/single-curved lens is placed in the groove, and sealant is poured into the groove to fix the lens group/single-curved lens.
Further, the lighting device further comprises a keel frame; a plurality of lamps are arranged on the keel frame at preset intervals; the installation support is arranged on the keel frame, and the lamp is installed on the support and can rotate along the driving direction of the tunnel.
Further, the preset distance is 1 meter, the length of the lamp is 0.8m,1m, and the aspect ratio of the light emergent surface formed by the lamp is more than or equal to 18.
Further, the lighting device further comprises an image acquisition unit for acquiring a face image of the driver and transmitting the face image to a data processing unit;
the data processing unit performs fatigue recognition on the facial image based on the fatigue recognition model and outputs a recognition result to the control unit;
when the recognition result is fatigue driving, the control unit controls the lighting lamp at the entrance section of the tunnel to start flashing so as to wake up the driver in the fatigue driving state.
Compared with the prior art, the application has at least one of the following beneficial effects:
1. according to the lighting equipment for the tunnel anti-glare, the incident light (namely, the light rays emitted by the lighting lamp) is adjusted through the light beam adjuster, so that the direction of the emergent light generated after adjustment through the light beam adjuster is in the same direction as the driving direction in the tunnel, the light rays generated by the lighting equipment can be prevented from being directly irradiated to eyes of a driver to generate glare, the driver can be influenced to accurately identify a driving route, and risks such as traffic accidents caused by the glare are effectively avoided.
2. The beam regulator can be a single-curved lens or a lens group, and the single-curved lens is adopted to enable the adjustment of the outgoing beam to have higher precision; the lens group comprises three curved surface lenses which are sequentially laminated from inside to outside, the light beam direction of the illuminating lamp is gradually adjusted through the three curved surface lenses, the design and processing difficulty of the curved surface lenses can be greatly reduced, and the light beam adjuster adopting the combination of the three curved surface lenses can keep the light transmission efficiency higher than 90% on the basis of realizing light beam adjustment.
3. According to the application, the distance between the lamps and the distance between the illumination lamps in the lamps are set, so that glare is prevented, the uniformity of illumination in the tunnel can be improved, and a friendly illumination environment is provided for a driver in the tunnel. Meanwhile, the illumination range of light beams generated by adjacent illumination lamps can be continuous, so that the light utilization rate is improved to a great extent under the condition of ensuring normal illumination, and the cost of illumination equipment is reduced.
4. According to the lighting equipment provided by the application, the face image of the driver is collected, the fatigue state of the image is identified, and when the driver is identified to be in the fatigue state, the lighting lamp at the entrance section of the tunnel can be controlled to flash, so that the driver is awakened, the attention of the driver is improved, and traffic accidents in the tunnel can be avoided.
In the application, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the application, like reference numerals being used to refer to like parts throughout the several views.
FIG. 1 is a schematic diagram of a ray trace simulation of a conventional tunnel lighting fixture product of the prior art;
FIG. 2 is a schematic diagram of a lighting device layout for tunnel anti-glare according to an embodiment of the present application;
FIG. 3 is a schematic view of a lamp with multiple lighting modules according to an embodiment of the application;
FIG. 4 (a) is a front view of a beam adjuster according to an embodiment of the present application;
FIG. 4 (b) is a schematic view of a beam adjuster according to an embodiment of the present application along A-A;
FIG. 5 is a schematic diagram of a ray trace of an illumination device in a tunnel according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a target light distribution curve according to an embodiment of the present application;
FIG. 7 is a schematic view of illumination beams between two adjacent illumination lamps according to an embodiment of the present application;
FIG. 8 is a schematic view of a keel frame according to an embodiment of the application;
FIG. 9 is a schematic diagram of an installation structure of a lamp on a keel frame according to an embodiment of the application;
Detailed Description
The following detailed description of preferred embodiments of the application is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the application, are used to explain the principles of the application and are not intended to limit the scope of the application.
In the prior art, because the installation height of the lamp in the short space of the tunnel is insufficient, the central optical axis of the lamp with symmetrical light distribution is vertical to the road surface, and the light rays facing the direction of a driver inevitably form glare. The glare not only causes discomfort in vision, but also prolongs the recognition time of people to objects, and the intense glare can damage vision and even cause short blindness, so that the glare control is very important for safe driving illumination.
Conventional road and tunnel lighting devices, whether "batwing" or lambertian light distribution, are symmetrical light sources, with the ray center axis perpendicular to the road surface for a fixed point, and fig. 1 is an exemplary ray trace simulation diagram of a conventional tunnel lighting fixture product. It can be seen that in conventional luminaire designs, the effect of glare is large.
Based on the defects of the prior art, a specific embodiment of the application discloses a lighting device for tunnel anti-glare, so as to overcome the defects. Specifically, as shown in fig. 2-4, the lighting device provided by the embodiment of the application comprises a plurality of lamps, wherein the lamps are symmetrically arranged at two sides of a tunnel; each lamp comprises a plurality of lighting modules which are arranged in a straight line;
each lighting module comprises a lighting lamp and a beam adjuster;
the light beam adjuster is used for adjusting a symmetrical light source generated by the illuminating lamp into an asymmetrical light source, and the emergent direction of the asymmetrical light source is consistent with the travelling direction of the tunnel.
In particular, the illumination lamp is used to create a symmetrical light source. Preferably, the illuminating lamp is an LED light source.
The light beam adjuster is used for adjusting a symmetrical light source generated by the illuminating lamp into an asymmetrical light source, an output light beam of the asymmetrical light source is a unidirectional light beam, and the emergent direction of the unidirectional light beam is consistent with the travelling direction of the tunnel. As shown in fig. 5, the central optical axis of the lighting device forms an asymmetric light distribution with a certain angle with the road surface along the driving direction, so that the glare is reduced, the light in the reverse driving direction is reduced, namely, the direct light which is directly incident into the driver is reduced, and the lighting light is led to be directed in the driving direction, thus being beneficial to target identification and overcoming the glare.
It should be noted that, in the embodiment of the present application, the tunnel refers to a unidirectional tunnel.
Preferably, the light adjuster is a lens group or a single-curved lens, and can adjust the emergent direction of the symmetrical light source generated by the illumination lamp to obtain a unidirectional emergent light beam.
For example, in order to achieve the anti-glare effect of the adjusted beam direction, the light emitting direction on the opposite side of the tunnel driving direction cannot be generally larger than 40 °, and in consideration of the illumination area, the angle of the light emitting direction on the same side as the tunnel driving direction can be increased, for example, to 60 °, so that in order to prevent glare and ensure illumination uniformity, the light source utilization rate is improved, and the final adjusted beam emission is set to satisfy the following requirements, the beam divergence angle is 78.3 ° on the section of 0 ° -180 °, the beam divergence angle is 48.4 ° on the section of 90 ° -270 °, the divergence angle is 77 ° on the section of 30 ° -210 °, and the divergence angle is 60.5 ° on the section of 60 ° -240 °, so as to form the unidirectional asymmetric target light distribution curve as shown in fig. 6. Therefore, compared with a symmetrical light beam emitted by the illuminating lamp, the required divergence angle of the target light beam is greatly reduced on each section, and the central optical axis of the light beam deflects from the original direction perpendicular to the road surface to the driving direction.
To convert the symmetrical beam of the illumination lamp into the above-mentioned asymmetrical beam, the present application provides two different means, one is implemented by using a single curved lens, and the other is implemented by using a lens group. The single-curved lens has the advantages of high beam adjustment precision, but the angle of the beam to be adjusted is very large, so that the formed single-curved lens surface is complex and the processing difficulty is high. In order to reduce the surface complexity and the processing difficulty of the curved lens, another mode is to adopt a mode of combining three curved lenses, and gradually adjust the emergent direction of the light beam through the three curved lenses, so that the final emergent light beam meets the target light distribution curve.
Specifically, as shown in fig. 4, the lens group includes three curved lenses that are stacked from inside to outside, and a certain air space is provided between adjacent curved lenses; the three curved lenses sequentially deflect the beam direction of the illuminating lamp to a certain angle towards the driving direction of the tunnel according to the sequence from inside to outside, gradually reduce the beam divergence angle, and finally enable the symmetrical light source generated by the illuminating lamp to be adjusted to be an asymmetrical light source with unidirectional light emitting as shown in fig. 5.
Specifically, the surface type structure of three curved lenses is determined as follows:
s1, acquiring an asymmetric light distribution curve of each layer of curved lens;
three curved lenses are adopted to gradually adjust the emergent direction and the beam divergence angle of the light beam, wherein the emergent direction of the light beam refers to an included angle between a central axis of the light beam and the travelling direction.
Firstly, the innermost curved lens adjusts the light beams, so that the divergence angle of the light beams of each section is reduced by a certain angle, the light beam emergent direction deflects to the driving direction by a certain angle, the light beam emergent direction and the light beam divergence angle adjusted by the innermost curved lens can be obtained, and the light distribution curve corresponding to the innermost curved lens can be obtained by combining the requirement of the illuminance uniformity of the road surface;
specifically, the angle at which the divergence angle of the beam corresponding to each curved lens is reduced and the angle at which the beam exits reversely deflected may be preset, so long as the light exiting from the last curved lens after passing through the three curved lenses is ensured to satisfy the target light distribution curve as shown in fig. 6.
The outgoing light of the innermost curved lens reaches the middle curved lens after being transmitted at a certain air interval, so that the light beam reaching the incidence surface of the middle curved lens can be obtained according to the light transmission principle, the light beam is used as the incidence light beam of the middle curved lens, the middle curved lens adjusts the incidence light beam, so that the divergence angle of the outgoing light beam is further reduced, the outgoing light beam direction is further deflected towards the driving direction, the outgoing light beam direction and the divergence angle of the light beam after being adjusted by the middle curved lens can be obtained, and the light distribution curve corresponding to the middle curved lens can be obtained by combining the requirement of the illuminance uniformity of the road surface;
similarly, after the outgoing light of the curved lens of the middle layer propagates at a certain air interval, the outgoing light reaches the curved lens of the outermost layer, so that the light beam reaching the incident surface of the curved lens of the outermost layer can be obtained according to the light propagation principle, the light beam is used as the incident light beam of the curved lens of the outermost layer, the incident light beam is adjusted by the curved lens of the outermost layer, the divergence angle of the outgoing light beam is further reduced, the outgoing light beam direction and the beam divergence angle of the outgoing light beam after the adjustment of the curved lens of the outermost layer can be obtained, the outgoing light beam of the curved lens of the outermost layer is the final required target light beam, and the light distribution curve corresponding to the curved lens of the outermost layer can be obtained by combining the requirement of the illumination uniformity of the road surface, and the light distribution curve is the target light distribution curve, as shown in fig. 6.
After the light distribution curves corresponding to the curved lenses of each layer are obtained, step S2 can be performed.
S2, based on the light distribution curve, obtaining a mapping relation between incident light rays and emergent light rays on two sides of each layer of curved lens by using an annular energy method, and obtaining an emergent angle of each annular belt on the layer of curved lens based on the mapping relation; and determining the surface type structure of each curved lens according to the emergence angle.
Specifically, in step S2, a mapping relationship between incident light rays and emergent light rays on two sides of the curved lens is established based on an annular energy method according to an asymmetric light distribution curve of each layer of curved lens;
specifically, for the innermost curved lens, calculating the energy distribution of the ring belt of the illuminating lamp as the energy distribution of the incident ring belt of the curved lens, and calculating the energy distribution of the emergent ring belt based on the light distribution curve, so that the incident light ray and the emergent light ray of the curved lens are established in a mapping relation taking the ring belt as a unit, namely, the mapping relation between the incident angle and the emergent angle of the curved lens, and the corresponding emergent angle of each ring belt can be obtained;
for the middle layer and the outermost layer curved lens, the incident light is the light obtained after the emergent light of the previous layer curved lens propagates at a certain air interval, so that the annular energy formed by the emergent light of the previous layer curved lens propagating at a certain air interval is used as the incident annular energy of the layer, the distribution of the emergent annular energy is calculated based on the light distribution curve of the layer, and the incident light and the emergent light of the layer curved lens are subjected to a mapping relationship taking the annular as a unit, namely, the mapping relationship between the incident angle and the emergent angle of the curved lens, and the emergent angle corresponding to each annular of the layer curved lens can be obtained.
The calculation of the energy distribution of the incident zone and the calculation of the energy distribution of the emergent zone are both the prior art, and are not described herein.
The outgoing light is represented by an outgoing angle, and the curved lens is described by the following formula:
sin(α i )＝n·sin(θ i+1 -β i )
wherein (x, y, z) is the coordinate of the moving point P on the curved lens, alpha i Is the curved lens action point P i Exit angle at curved lens position, beta i Is the dynamic point P i Inclination angle of tangent line at curved lens position, theta i Is the dynamic point P i The beam-converging angle of the illuminating lamp at the position of the curved lens, n is the refractive index of the curved lens, and delta P i P i+1 Is the dynamic point P i And P i+1 Step length between; the method comprises the steps of solving the position coordinates (x, z) of each moving point P on each curved lens according to a formula except for the P point coordinates, fitting each curved lens busbar equation according to a plurality of moving point coordinates of each curved lens, guiding the busbar equation into Solid Works software, rotating the busbar equation along a symmetry axis to obtain a three-dimensional model of each curved lens, guiding the model into Ligh Tools, and carrying out optical simulation and optimization with a final light distribution curve as a target to obtain a final three-curved lens face structure.
Specifically, the air space between the three curved lenses may be determined according to the lens group size design requirements.
In another embodiment, the beam adjuster is a single curved lens.
Specifically, the surface type structure of the single-curved lens is obtained as follows:
s1, acquiring an asymmetric light distribution curve of a single-curved lens;
as described above, in order to achieve the anti-glare effect of the adjusted beam direction, the light-emitting direction on the opposite side to the tunnel driving direction is generally not greater than 40 °, and in consideration of the illumination area, the angle of the light-emitting direction on the same side as the tunnel driving direction may be increased, for example, to 60 °, so that in order to prevent glare and to ensure uniformity of illumination, the light source utilization rate is improved, and the final adjusted beam emission is set to satisfy the following requirements, the beam divergence angle is 78.3 ° on the section of 0 ° -180 °, the beam divergence angle is 48.4 ° on the section of 90 ° -270 °, the beam divergence angle is 77 ° on the section of 30 ° -210 °, and the divergence angle is 60.5 ° on the section of 60 ° -240 °, thereby forming the unidirectional asymmetric target light distribution curve as shown in fig. 6.
The target light distribution curve is the light distribution curve of the single-curved lens due to the adoption of the single-curved lens.
S2, based on the light distribution curve, obtaining a mapping relation between incident light rays and emergent light rays on two sides of the single-curved lens by using an annular energy method, and obtaining an emergent angle of each annular zone on the single-curved lens based on the mapping relation; and determining the surface type structure of the single-curved-surface lens according to the emergence angle.
Specifically, in step S2, a mapping relationship between incident light rays and emergent light rays on two sides of the single curved lens is established based on an annular energy method according to an asymmetric light distribution curve of the single curved lens.
The energy distribution of the annular zone of the illuminating lamp is calculated as the energy distribution of the incident annular zone of the single-curved lens, and the energy distribution of the emergent annular zone is calculated based on the target light distribution curve, so that the incident light ray and the emergent light ray of the curved lens are established in a mapping relation taking the annular zone as a unit, namely, the mapping relation between the incident angle and the emergent angle of the curved lens, and the corresponding emergent angle of each annular zone can be obtained.
The calculation of the energy distribution of the incident zone and the calculation of the energy distribution of the emergent zone are both the prior art, and are not described herein.
The outgoing light is represented by an outgoing angle, and the single curved lens is described by the following formula:
sin(α i )＝n·sin(θ i+1 -β i )
wherein (x, y, z) is the coordinate of the moving point P on the single curved lens, alpha i Is the dynamic point P i The exit angle at the single curved lens position, beta i Is the dynamic point P i Inclination angle theta of tangent line at single curved surface lens position i Is the dynamic point P i The beam-converging angle of the illuminating lamp at the position of the single-curved lens, n is the refractive index of the single-curved lens, and delta P is the refractive index of the single-curved lens i P i+1 Is the dynamic point P i And P i+1 Step length between; the method comprises the steps of solving the position coordinates (x, z) of each moving point P of the single-curved lens according to a formula except for the point P coordinates, fitting a single-curved lens busbar equation according to a plurality of moving point coordinates, guiding the busbar equation into Solid Works software, rotating the busbar equation along a symmetry axis to obtain a three-dimensional model of the single-curved lens, guiding the model into Ligh Ttools, and carrying out optical simulation and optimization with a final light distribution curve as a target to obtain a final single-curved lens surface type structure.
Specifically, the curved lens is made of PMMA.
As known by those skilled in the art, according to the determined target light distribution curve, a lens group or a single-curved lens with definite directivity, asymmetric light distribution and high light extraction efficiency can be obtained through secondary optical design of the lens, so that the irradiation uniformity is improved, the influence of glare on drivers is reduced, and the target recognition capability of the drivers is improved. And the light beam direction of the illuminating lamp is gradually adjusted through the three curved lenses, so that the design and processing difficulty of the curved lenses can be greatly reduced, and the light beam adjuster adopting the combination of the three curved lenses can keep the light transmission efficiency higher than 90% on the basis of realizing light beam adjustment.
Preferably, the lamp further comprises a lamp panel, the lamp panel is a PCB, and the illuminating lamp and the beam adjuster are mounted on the lamp panel.
Specifically, as shown in fig. 7, the lamp panel is a PCB board, and a plurality of groups of illumination lamps and beam adjusters are arranged on the lamp panel.
Through the reasonable installation distance that sets up between each light, can make the outgoing light beam each other not shelter from, and can form continuous illumination uniform illumination region, and preferably, the distance between each light sets up to 22mm.
In order to facilitate the installation of the light beam adjuster, the lamp panel is provided with a groove, the bottom of the lens group/single-curved lens is placed in the groove, sealant is poured into the groove to fix the lens group/single-curved lens, and the illuminating lamp is fixed on the lamp panel and is positioned in a closed space formed by the light beam adjuster and the lamp panel, so that the illuminating lamp can be protected.
Preferably, the lighting device further comprises a keel frame; the lamps are arranged on the keel frame at preset intervals. The keel frame structure is shown in figure 8.
For the installation of the lamps and lanterns of being convenient for, be provided with the installing support on the keel frame, the lamps and lanterns are installed on the support to can follow tunnel driving direction rotation, as shown in fig. 9.
The zebra stripes formed by the brightness change form flicker in the high-speed running process, and the flicker frequency is lower than 2.5Hz or higher than 15Hz according to standard requirements. The brightness variation interval should be greater than 8.5m or less than 1.47m calculated at a design speed of 80 km/h. In order to form a quasi-continuous lighting effect, thoroughly overcome bright and dark flickering of light rays with a zebra effect, improve lighting uniformity and achieve the effect of guiding and enhancing.
Specifically, the lighting equipment further comprises a direct current power supply, wherein the direct current power supply supplies power to the lamp and is arranged on the keel frame at a certain interval.
In order to ensure safe and reliable operation of the system, the system adopts a centralized power supply mode, comprehensively considers various aspects such as line loss factors, power failure influence length factors, economic factors and the like, and a centralized direct current power supply is arranged every 15m to 40m, as shown in figure 1.
According to the lighting equipment for tunnel anti-glare disclosed by the embodiment of the application, firstly, the incident light (namely, the light rays emitted by the lighting lamp) is adjusted through the light beam adjuster, so that the direction of the emergent light generated after adjustment through the light beam adjuster is in the same direction as the driving direction in the tunnel, the light rays generated by the lighting equipment are prevented from being directly irradiated to eyes of a driver to generate glare, the driver is influenced to accurately identify a driving route, and the risks such as traffic accidents caused by the glare are effectively avoided. And secondly, the beam adjuster comprises three curved lenses which are sequentially laminated from inside to outside, the beam direction of the illuminating lamp is gradually adjusted through the three curved lenses, the design and processing difficulty of the curved lenses can be greatly reduced, and the light transmission efficiency of more than 90% can be maintained on the basis of realizing the adjustment of the light beams by adopting the beam adjuster combined by the three curved lenses. According to the illumination equipment for the tunnel anti-glare, disclosed by the embodiment of the application, the illumination uniformity in the tunnel can be improved while the glare is prevented by setting the intervals of the lamps and the intervals among the illumination lamps in the lamps, so that a friendly illumination environment is provided for a driver in the tunnel. Meanwhile, the illumination range of light beams generated by adjacent illumination lamps can be continuous, so that the light utilization rate is improved to a great extent under the condition of ensuring normal illumination, and the cost of illumination equipment is reduced.
The tunnel is a traffic accident zone, traffic accidents are easier to be caused when drivers are in a fatigue state, and the application also provides a preferred implementation mode for avoiding traffic accidents caused by fatigue driving.
In this embodiment, the lighting device further comprises an image acquisition unit, a data processing unit, a control unit;
the image acquisition unit is used for acquiring the face image of the driver and sending the face image to the data processing unit;
the data processing unit performs fatigue recognition on the facial image based on the fatigue recognition model and outputs a recognition result to the control unit;
when the recognition result is fatigue driving, the control unit controls the lighting lamp at the entrance section of the tunnel to start flashing so as to wake up the driver in the fatigue driving state.
Specifically, the image acquisition unit is arranged at the entrance of the tunnel and is used for acquiring face images of drivers in vehicles which are about to enter the tunnel.
In order to enable the image acquisition unit to acquire clear images both in the day and at night, it is preferable that the image acquisition unit is an infrared array detector for acquiring gray-scale images of the face.
The data processing unit is provided with a pre-trained fatigue recognition model, performs fatigue recognition on the received face image by using the fatigue recognition model, outputs a recognition result, specifically, the recognition result comprises a fatigue state and a normal state, and outputs the recognition result to the control unit.
In practice, the fatigue recognition model adopts a model which can perform fatigue recognition based on a facial image, such as an existing neural network model, an SVM model, and the like.
In particular, the data processing unit may be a CPU.
Specifically, the control unit further comprises a wireless transmitting module, and the control unit sends control signals to each lighting lamp at the entrance section through the wireless transmitting module so as to control the lighting lamps to flash.
Specifically, the control signal is a PWM pulse signal.
The control unit receives the fatigue recognition result sent by the data processing unit, and when the recognition result is in a fatigue state, the control unit generates a control signal and sends the control signal to each lighting lamp through the internal wireless transmitting module.
Specifically, the lighting lamp also comprises a wireless receiving module, an amplifier and a relay; the normally closed contact of the relay is connected into a power supply loop of the lighting module; the wireless receiving module is used for receiving the control signal sent by the control unit, and the amplifier amplifies the control signal and sends the amplified control signal into the coil control end of the relay, so that the on-off of the relay is controlled, and the lighting lamp starts to flash.
It can be understood that the wireless receiving module is configured to receive a control signal sent by the wireless transmitting module in the control unit, output the control signal to the amplifier, amplify the control signal by the amplifier, and send the amplified signal to the coil control end of the relay.
Specifically, because the normally closed contact of the relay is connected into the power supply loop of the lighting module, the lighting module is normally electrified to perform lighting under the condition of no control signal; when the lighting lamp receives the control signal, the relay acts under the action of the control signal, namely, when the PWM signal is at a high level, the relay acts, the normally-closed contact is opened, the lighting lamp is extinguished, and when the PWM signal is at a low level, the relay keeps the normally-closed contact closed, and the lighting lamp emits light, so that the lighting lamp is controlled to form a flickering visual effect under the action of the high and low levels of the PWM signal.
Specifically, the wireless transmitting module and the wireless receiving module can be a Lora module or a ZigBee module.
Specifically, the control unit is a microcontroller, which is an STM32, for example.
According to the embodiment of the application, the image acquisition module acquires the face image and performs fatigue state identification, and when the identification result is fatigue, the illumination lamp at the entrance section of the tunnel can be controlled to flash so as to wake up the driver in the fatigue state and prevent traffic accidents.
The present application is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application.
Claims (4)
1. The anti-glare lighting device for the tunnel is characterized by comprising a plurality of lamps symmetrically arranged on two sides of the tunnel; the lighting device further comprises a keel frame; a plurality of lamps are arranged on the keel frame at preset intervals; the lamp is arranged on the bracket and can rotate along the driving direction of the tunnel; the preset distance is 1m, the length of the lamp is 0.8m and 1m, and the aspect ratio of the light emergent surface formed by the lamp is more than or equal to 18;
each lamp comprises a plurality of lighting modules which are arranged in a straight line;
each lighting module comprises a lighting lamp and a beam adjuster;
the light beam adjuster is used for adjusting a symmetrical light source generated by the illuminating lamp into an asymmetrical light source capable of emitting light unidirectionally, and an included angle between the central light beam direction of the asymmetrical light source and the driving direction of the tunnel is an acute angle;
the light beam adjuster is a lens group or a single-curved lens; the lens group comprises three curved lenses which are overlapped from inside to outside, and a certain air space is arranged between every two adjacent curved lenses; the three curved lenses sequentially deflect the beam direction of the illuminating lamp to a certain angle towards the driving direction of the tunnel according to the sequence from inside to outside, and finally the symmetrical light source generated by the illuminating lamp is adjusted to be an asymmetrical light source with unidirectional light emission; the surface type structure of the three curved lenses was determined as follows: acquiring an asymmetric light distribution curve of each layer of curved lens; based on the light distribution curve, obtaining a mapping relation between incident light rays and emergent light rays on two sides of each layer of curved lens by using an annular energy method, and obtaining an emergent angle of each annular belt on the layer of curved lens based on the mapping relation; determining the surface type structure of each curved lens according to the emergence angle;
the surface structure of the single-curved lens is determined as follows: acquiring an asymmetric light distribution curve of the single-curved lens; based on the light distribution curve, obtaining a mapping relation between incident light rays and emergent light rays on two sides of the single-curved lens by using an annular energy method, and obtaining an emergent angle of each annular zone on the single-curved lens based on the mapping relation; and determining the surface type structure of the single-curved lens according to the emergence angle.
2. A lighting device for tunnel anti-glare as recited in claim 1, wherein said lighting lamp is an LED.
3. A lighting device for preventing glare in a tunnel as claimed in any one of claims 1 to 2, wherein said light fixture further comprises a light panel, said light panel being a PCB, said illumination lamp, beam adjuster being mounted on said light panel; the lamp panel is provided with a groove, the bottom of the lens group/single-curved lens is placed in the groove, and sealant is poured into the groove to fix the lens group/single-curved lens.
4. The lighting apparatus for tunnel anti-glare according to claim 1, further comprising an image acquisition unit, a data processing unit, a control unit;
the image acquisition unit is used for acquiring the face image of the driver and sending the face image to the data processing unit;
the data processing unit performs fatigue recognition on the facial image based on the fatigue recognition model and outputs a recognition result to the control unit;
when the recognition result is fatigue driving, the control unit controls the lighting lamp at the entrance section of the tunnel to start flashing so as to wake up the driver in the fatigue driving state.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131630A (en) * | 2019-06-25 | 2019-08-16 | 深圳市铭濠科技有限公司 | A kind of Tunnel Lamp of free from glare |
| CN209638797U (en) * | 2019-05-13 | 2019-11-15 | 史杰 | A kind of glare prevention LED grid illumination module and lamps and lanterns |
| CN214535926U (en) * | 2021-05-24 | 2021-10-29 | 广东立佳交通科技有限公司 | High-power glare-free LED (light emitting diode) front lighting tunnel lamp |
| CN113795069A (en) * | 2021-11-18 | 2021-12-14 | 深圳市奥新科技有限公司 | Tunnel illumination control method and tunnel illumination system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209638797U (en) * | 2019-05-13 | 2019-11-15 | 史杰 | A kind of glare prevention LED grid illumination module and lamps and lanterns |
| CN110131630A (en) * | 2019-06-25 | 2019-08-16 | 深圳市铭濠科技有限公司 | A kind of Tunnel Lamp of free from glare |
| CN214535926U (en) * | 2021-05-24 | 2021-10-29 | 广东立佳交通科技有限公司 | High-power glare-free LED (light emitting diode) front lighting tunnel lamp |
| CN113795069A (en) * | 2021-11-18 | 2021-12-14 | 深圳市奥新科技有限公司 | Tunnel illumination control method and tunnel illumination system |
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