CN102798065A - Low-lamp-position multi-dimensional road lighting system - Google Patents

Abstract

The present invention proposes a low-light multi-dimensional road lighting method, which is composed of multiple dimensional lighting components, including: reverse lighting components, same-directional lighting components, horizontal lighting components and vertical lighting components. Each lighting component is independent and adjustable in terms of lighting function, light color range, irradiation direction, and irradiation space; according to the nature of the task, each component has a dedicated light source and lamp installed at a low level and operated independently. To undertake the tasks of road lighting, space lighting, complex weather lighting and indication lighting respectively. In each task, its efficiency is maximized, so that the overall lighting can be comprehensively optimized. The present invention overcomes the disadvantages of the traditional high-level lighting mode and the existing low-level lighting mode, enables the above-mentioned different-purpose light sources and lamps to perform their duties, effectively solves the problems of glare, ineffective lighting, and poor longitudinal uniformity, and greatly Improved lighting efficiency. The present invention is an independent application research and development based on the characteristics of low-power and high-efficiency light sources. It fundamentally breaks away from the lighting method of traditional floodlights, and also jumps out of the mode of simply replacing HPS lamps with LED lamps.

Description

A low light position multi-dimensional road lighting method

technical field

The present invention is the first part of the inventor's series of inventions - "multi-dimensional road lighting system", and relates to a new road lighting method, specifically a low-light multi-dimensional road lighting method.

Background technique

At present, the general lighting method of expressway and highway lighting is to use high-light street lamps, the light source is HPS, the installation height is about 10m, the installation distance is about 30m, and the single lamp power is about 250W. This lighting method constitutes the current mainstream lighting method. This lighting method is mature in technology, but due to the high lamp position and high power of a single lamp, there are the following problems:

1. Glare problem

The road lighting design specification requires the use of cut-off and half-cut street lights to reduce glare. This measure can limit glare but not eliminate it. The reason for glare is: taking cut-off lamps (including HPS lamps and LED lamps) as an example, the main irradiation part of the light path is not projected into the eyes of motor vehicle drivers. In this sense, cut-off lamps basically avoid direct glare. However, this type of lamp always has a very bright light-emitting surface. Since there is a height difference H between the light-emitting surface and the driver, there is always an angle of view α so that the driver can look directly at the light-emitting surface and feel the light coming from the front and above. The glare on the light-emitting surface of the street lamp (see Figure 1). This glare is not direct glare in the traditional sense, but it still belongs to disability glare.

The sufficient condition for the glare to exist is: α>0.

To change α greater than 0, there are two measures. One is to place the lamp obliquely so that the light-emitting surface of the lamp is parallel to the driver's forward and upward line of sight (see Figure 2), so that the α angle is 0. However, when the motor vehicle is moving, the size of the α angle changes all the time, so this method cannot eliminate the glare of vehicles in different positions in the driving direction; It reduces the glare from the opposite direction of traffic, so it is not advisable.

Another measure is to reduce the height of the street lamp, and when the height of the street lamp is the same as the height of the driver's eyes, the α angle is 0. But this will bring a series of problems such as light distribution, especially it is obviously not feasible to reduce the height of the existing 250W-400W HPS street lamp to the height of the driver's eyes.

Therefore, roads with high light level lighting methods have disability glare coming from the front and upper direction of bicycles.

(2) Invalid lighting problem

In order to improve the uniformity of illuminance, the high lamp position lighting method illuminates the space below the light source as evenly as possible, forming a light curtain area as shown in Figure 3.

For closed express roads, motor vehicle drivers only need to observe the road surface and the situation ahead of the road without observing the target situation inside and outside the road at the same time. Therefore, road lighting does not require a light curtain space close to 10m above the road surface, and its light curtain space can be reduced to half or even lower. The driver's recognition of the road surface and obstacles ahead mainly depends on the lighting in this light curtain space. The light curtain space within this height is called the effective light curtain area, and only the illumination in the effective light curtain area is meaningful. Obviously, there is a large proportion of invalid light curtain areas in the current high-light-level lighting method.

At the same time, according to the cosine law, it can be proved that even in the effective light curtain area, there is a large proportion of invalid lighting components in the current high-light level lighting method.

In fact, only the active illumination component within the active light curtain area is active illumination. The invalid lighting includes the lighting in the invalid light curtain area and the invalid lighting components in the effective light curtain area.

On the other hand, according to the inverse square law, the vertical distribution of illuminance of the current high-light level lighting is bright at the top and dark at the bottom. This makes the illuminance of the upper invalid light curtain area higher than the illuminance of the lower effective light curtain area. This is obviously contrary to the basic requirements of the driver to observe the lighting needs of the upper dark and lower bright.

Therefore, the current mainstream lighting methods have a large proportion of ineffective lighting and the problem of violating the basic needs of lighting.

(3) Low visibility problem

The installation spacing of high-light street lamps is about 30m, which makes it difficult for the vertical illuminance in the direction of motor vehicles to be uniform (this is a "zebra crossing" in the sense of non-horizontal illuminance). Some studies have pointed out that the vertical illuminance in some areas is very weak, even close to zero.

We know that there is a quasi-linear positive correlation between the surface brightness of the front target and the vertical illuminance of the space, and there is also a segmented positive correlation between the brightness and the visibility of the front target in the intermediate vision range, see Figure 4.

It can be seen from Figure 4 that when the average brightness drops to 0.1-0.5cd/m ² , the visibility will drop below 20%.

This indicates that there are areas with particularly low visibility under high-level street lighting.

The uneven vertical illuminance will also lead to uneven brightness (flickering) in the space ahead of the driving direction, and will also reduce the visibility RP value of the target ahead, as shown in Figure 5. The uneven vertical illuminance, on the one hand, will lead to lower visibility in some dark areas, and also cause a decrease in overall visibility.

The above analysis shows that the current common road lighting method (high light level lighting method) is the root cause of these three problems. This method cannot solve the problems of glare, ineffective lighting and low visibility.

The high-light-level lighting method was born with the application of high-voltage gas discharge (including HPS) light sources, and has exposed obvious drawbacks; with the invention of new light sources such as LEDs, new and more advanced lighting will inevitably emerge. Way.

The emergence of LED light sources does provide an opportunity to solve the above problems.

LED has the characteristics of high brightness, small size, high color rendering, low-voltage safety and dispersible installation, which provides a suitable light source for solving the three problems in another way.

However, the current LED application and research and development are mainly to replace LEDs with traditional light sources. Almost all LED manufacturers follow the design ideas of traditional street lamps and pursue high-power LED street lamps with tens of watts and hundreds of watts in order to match the current HPS. The lamp shapes and installation methods are completely the same or compatible, resulting in the fact that almost all current LED street lamps and installation methods are designed and manufactured based on the "snake head (flat snake head) lamp" suitable for HPS light sources, instead of research and development based on the law of LED light emission. .

We know that low-power LED light sources are suitable for decentralized installation, and there is no outstanding heat dissipation problem. However, the concentration of high-power LED street lamps and high-light-level lighting have brought about problems that should not have occurred, such as poor heat dissipation, poor durability, and inconvenient maintenance. Questioned in the lighting engineering world.

In fact, replacing the HPS light source with an LED light source is not a change in the lighting method, and it is impossible to solve the above three problems in the high-light-level lighting method.

The hundreds of watts and high lamp position LED street lighting characterized by simple replacement not only did not solve the problems existing in traditional HPS street lights, but increased new problems such as heat dissipation, which shows that the current LED street lighting needs to go out of the simple replacement mode and carry out the following It is an independent research and development for the purpose of reflecting the characteristics of LED itself and giving full play to the advantages of LED.

Recently, low-light street lighting methods have begun to appear. In low-level street lighting, lamps are directly installed on road guardrails and isolation belts to project light onto the road to meet the necessary lighting requirements for the road.

Patent CN201110175282.5 discloses a two-way low-position LED road light. The light uses LED as the light source. In fact, it is just an ordinary guardrail light. Practice has proved that guardrail lights cannot meet the indicators stipulated in the expressway lighting specification.

The patent (ZL 200720095548.4) CN201014304Y discloses a low installation height street lamp, using MH lamps as the light source, the installation distance is 8m to 11m, and the installation height is within 1.2m. The low light level lighting partially overcomes the problem of large invalid light curtain area in the high light level lighting method; if the LED light source is used, the heat dissipation problem of the high-power LED light source can be partially solved. But there are still following problems:

1. Low lighting efficiency

Although this low-light level lighting method overcomes the problem of large invalid lighting space in high-light level lighting to a certain extent, because the distance between light sources becomes smaller, the result is that the horizontal lighting component increases, and the reverse and positive Directional lighting component is very small. The analysis shows that the lateral lighting component is mainly effective for improving the visibility level of objects on the road under abnormal weather conditions, and the lateral lighting can provide the basic brightness of the road surface required by the driver to observe the road ahead and obstacles in normal weather conditions, and form the surface of the front object Brightness and improving the brightness contrast between the objects in front and the road background contribute very little and are not an effective way to illuminate the road.

In fact, the lighting method disclosed in CN 201014304Y has no obvious advantage over the current high lamp position lighting method in terms of power density, the main index of lighting energy saving.

2. Low level of visibility

In this low-light level lighting method, the same light source and lamp are used for the reverse and the same direction lighting components, the chromaticity is the same, and the lighting space is not independent. It is impossible to form a high brightness contrast and chromaticity contrast between the road background and the front object, and the road surface The brightness uniformity is lower, resulting in a lower visibility level of objects in front.

3. In this low light level lighting mode, all the light is concentrated below the height of 1.5m on the road surface, which cannot provide the driver with the necessary spatial illumination to observe the obstacles ahead.

4. This low-level lighting method cannot really eliminate glare. Within the driver's field of vision, the glare from the "light-emitting surface" of the front side lamps can still be felt (because the installation height is 1.2m).

5. The low light level lighting method has the problem of "strobe flickering", which may easily cause the driver's visual fatigue.

To sum up, the above two lighting methods of high-light level lighting and low-light level lighting are still essentially one light that undertakes the triple tasks of road lighting, space lighting, and complex weather lighting at the same time. They interact with each other in space and time. It is impossible to achieve the best results due to constraints; logically, only when the above tasks are decomposed and completed by independent low-power, high-efficiency light sources, lamps and lighting control systems, controlled separately, and operated independently, can it be possible for road lighting, Space lighting and complex weather lighting are the best respectively, so as to achieve the overall best, thereby greatly improving lighting efficiency, improving visibility levels, and saving energy.

Contents of the invention

The present invention synthesizes 7 items of multiple requirements and 2 items of special problems for expressway lighting. On this basis, the inventor proposes the following relevant countermeasures, see the table below.

Lighting needs:

Special Questions:

The present invention proposes a new road lighting method—a low-light multi-dimensional road lighting method. The lighting method is composed of multiple dimensional lighting components, including one-dimensional reverse lighting components, one-dimensional A horizontal lighting component and a one-dimensional vertical lighting component, each with its own light source and fixture.

The illumination components of multiple dimensions are independent and adjustable in terms of illumination function, light color range, irradiation direction, and irradiation space; in terms of control methods, each illumination component can operate independently or in combination; in terms of operation mode, Normal mode or energy-saving mode can be used; the optimal combination of different control methods and operating modes can exert higher performance.

The light sources and lamps of each lighting component described above operate independently; the lamps are installed on both sides of the expressway with a height not higher than 1.5m, and are installed separately or integrated into one.

The basic principle of the low light level reverse lighting is as follows: the road is the main background for the driver to observe the obstacles in front, providing the necessary road brightness is the basic requirement of tunnel lighting, and reducing glare and improving brightness uniformity are important tasks of tunnel lighting . When the street lamp is located on both sides of the road, it casts light on the road in front of the motor vehicle in the direction opposite to the driving direction, and reflects it regularly. For (see Figure 6):

E _r : the reflected illuminance vector of the light source on the road surface;

E _e : the component of the reflected illuminance of the road surface in the direction of the visual axis of the driver's eye;

α: the incident angle of the light source, that is, the angle between the normal of the road surface and the light projection direction of the light source;

：机动车驾驶员视线方向与路面之间的夹角，取

: The angle between the line of sight of the motor vehicle driver and the road surface, which is taken as

θ: The angle between the plane where the light source projection direction is located and the plane where the driver's line of sight is located.

When α→89°, E _e →E _r .cosθ, that is, when the height of the light source decreases, the amount of light radiation reflected by the road surface on the observation line of sight will increase; in road lighting, the α angle of the light source installed at a high position is much smaller than that at a low position The α angle of the installed light source, so the component of the reflected illuminance of the road surface in the direction of the driver's eye axis is much smaller than that of the low-light level lighting under high-light level lighting.

When θ→90°, the illumination direction of the light source is perpendicular to the roadway. At this time, E _e →0, the lighting efficiency is extremely low.

The real reflection of the light source on the road surface is irregular reflection, which is the superposition of regular reflection and diffuse reflection, and obeys Lambert's law.

The above analysis shows that when the light source illuminates the road ahead with a light projection angle close to parallel to the road (low light level) and the direction of illumination is opposite to the driving direction (reverse lighting), the driver can obtain higher road surface reflection brightness in the direction of the driver's line of sight. Higher brightness uniformity and can control glare at a smaller value; in the present invention, the function of the reverse lighting component is to provide necessary road surface brightness, higher brightness uniformity and control glare at a smaller value; for reverse lighting Light source, the color temperature is not higher than 4000K, the height is lower than the eye level of the motor vehicle driver, the irradiation direction is opposite to the driving direction of the lane, the irradiation range is 90° to 180° and 180° to 270° in the horizontal direction, and 180° in the vertical direction. ° to 220° (see attached drawing 7), the irradiation space is the space below the lamp height position and the road surface, no elevation angle scattering (see attached drawing 8); the operating mode is the normal mode (always fully on during the normal turn-on time) and energy saving There are two modes (dimming based on normal mode).

The basic principle of the same direction lighting with low light level is (see accompanying drawing 9):

E _e ＝ E _r ·cosα·cosβ

E _r : the reflected illuminance vector of the light source on the obstacle surface;

E _e : the component of the reflected illuminance on the surface of the obstacle in the direction of the visual axis of the driver's eye;

α: the incident angle of the light source, that is, the angle between the road surface and the light projection direction of the light source;

β: The angle between the reflected illuminance vector and the visual axis of the driver's eye.

When α→0° and β→0°, E _e →E _r , that is, the amount of light radiation E _e on the observation line of sight will achieve the maximum value; the above analysis shows that when the light source is close to parallel to the road surface at the projection angle (low lamp position), the irradiation direction is the same as the driving direction (same direction lighting) to irradiate the front space, the higher obstacle reflection brightness can be obtained in the direction of the driver's line of sight; in the present invention, the function of the same direction lighting component is based on higher Color-rendering light source provides motor vehicle drivers with space lighting in front of the road. When used together with low-level reverse lighting components, it improves the brightness and chromaticity contrast between the road background and obstacles in front to improve the barrier The visibility level of objects; the light source used for the same direction lighting, the color temperature is higher than the reverse lighting component, the color rendering index is greater than 70, the height is near the eye level of the motor vehicle driver, the irradiation direction is the same as the driving direction of the lane, and the irradiation range The horizontal direction is 0° to 90° and 270° to 0° (see Figure 10), and the vertical direction is 0° to 40° (see Figure 11). The irradiation space is the space above the lamp height, which has nothing to do with the reverse lighting component. Intersection; the operating mode is the normal mode (full on in different periods during the normal turn-on time) and the energy-saving mode (dimming on the basis of the normal mode).

The basic principle on which the horizontal lighting is based is: in rain, fog, haze, smoke and other weather conditions, the reason why the efficiency of the high beam of the motor vehicle is significantly lower is that a large amount of suspended air is gathered in the air in front of the motor vehicle. Sol molecules. This causes on the one hand part of the incident light directed at the object in front of the motor vehicle to be absorbed and scattered by the water molecule clusters on the optical path before reaching the object, and the scattered part forms a white fog curtain, that is, the "white (fog) wall effect", causing The driver cannot see the obstacles in front of the road clearly; on the other hand, the incident light reaching the object in front of the motor vehicle is reflected and the light is absorbed and scattered by the aerosol molecular clusters suspended in the air, which weakens the brightness and intensity of the reflected light. Contrast, resulting in greatly reduced visibility of obstacles ahead of the motor vehicle. When the angle between the incident light and the driver's line of sight is close to vertical, the "white (fog) wall" phenomenon can be effectively overcome, and it is an effective method to solve road lighting in foggy days; in the present invention, the function of the lateral lighting component is to provide illumination Space lighting whose direction is close to perpendicular to the driver's line of sight can improve the visibility of obstacles ahead under complex weather conditions; light sources and lamps used for lateral lighting have a spectrum with high penetrating power, and their irradiation direction is consistent with the lane The driving direction of the vehicle is vertical, and the horizontal direction of the irradiation range is 0° to 180° and 180° to 0° respectively, parallel to the road surface (see Figure 12). , The lighting components in the same direction have intersection; the operation mode is the normal mode (not turned on in normal weather, only fully turned on in rain, fog, smoke, and haze weather) and energy-saving mode (dimming based on the normal mode).

The basic principle on which the vertical lighting is based is: when an accident occurs on the road surface and the direction needs to be indicated, a beam of vertical light with strong penetrating power can form a local landmark at the irradiation site; in the present invention, the function of the vertical lighting component is to provide Indicative lighting, when an accident requires rescue, clearly mark the accident location in the air; the light source and lamps used for vertical lighting, the irradiation direction is perpendicular to the road surface, and the irradiation range is 87° to 93°, (see Figure 13) , the illumination space is above the road, and has no intersection with other lighting components. The light color of the light source is monochromatic or multiple light colors alternately; the operating mode is not normally turned on, and it is only manually turned on in special needs.

In the low light position multi-dimensional road lighting mode, for non-horizontal road sections, the power density is higher than that of horizontal road sections because the visible distance is shortened; Increased density.

The key technology of the low-light-level multi-dimensional road lighting method is to limit glare; the measure to limit the glare caused by the light source used for reverse lighting to the direction of driving is to use an upper light-cutting shading plate and a reasonable light distribution on the lamp; The measure for the glare caused by the light source of the same direction lighting and horizontal lighting against the opposite driving direction is to install a louvered anti-glare grille on the middle isolation belt.

The low light level multi-dimensional road lighting method is open. The above-mentioned multi-dimensional lighting components constitute the basic lighting. The measure to further improve the lighting function is to add more dimensional lighting components.

The beneficial effect of the present invention is that: the traditional road lighting method is decomposed into multi-dimensional lighting to form a reverse lighting component, a same direction lighting component, a horizontal lighting component and a vertical lighting component. To undertake the tasks of road lighting, space lighting, complex weather lighting and indication lighting respectively. According to the nature of the task, set up special light sources and lamps, with the goal of improving the driver's identification, with power density (much lower than the power density of the current high-level lighting of HID lights and LED lights) and no glare from street lights. Constraints, under the guidance of intermediate vision theory, in each task, light sources and lamps for different purposes perform their duties and are controlled independently to maximize their efficiency, so that the overall lighting can be comprehensively optimized.

The mechanism of eliminating glare based on low-level multi-dimensional road lighting is that traditional high-level lighting only makes a fuss about the design of lamps. The key to eliminating glare in multi-dimensional lighting systems is to adopt comprehensive measures. When designing hoods for lamps, set shading isolation strips at the same time. , to block the glare from the opposite traffic.

The present invention has the following comparative advantages:

1. Compared with the lighting method of high lamp position

1) energy saving

There is a large invalid lighting space in the high-light level lighting method, and there is also a large ineffective lighting component in the effective lighting space, which leads to low lighting efficiency of the high-light level lighting method. The essence is that the irradiation space is too large. The irradiation direction is also unreasonable when the non-essential area is illuminated; in the multi-dimensional lighting method proposed by the present invention, the way to improve the lighting efficiency is to greatly reduce the lighting area and make the illumination distribution reasonable; The efficiency of this method is much higher than that of the current general lighting method. For the illumination of obstacles in front, the efficiency of the low light level illumination method is much higher than that of the current general lighting method. Combining the above two methods, the light source and lamps perform their respective duties, and the power density will be greatly reduced compared with the current high lamp position lighting method.

2) Reduce glare

In the high light level lighting mode, the reverse light projection component will cause direct glare above the front of the vehicle in the current driving direction, and the same direction projection will cause direct glare above the front and top of the vehicle in the opposite driving direction. above the driver's eye level and project light downward, thus directly exposed to the driver's front vision; Light measures; the light source is located near the driver's eye level and projects light upwards, and measures are taken to cut light downwards. The above two light projection and light cut-off measures can prevent the light source from being directly exposed to the driver's front vision, and significantly reduce the glare index compared with the current high-light lighting method.

3) Improve visibility

Since the multi-dimensional lighting method separates the illumination space of the reverse lighting component and the same direction lighting component and adjusts the light separately, a strong brightness contrast between the road background and the front object can be formed; in addition, through the reverse lighting component, the same direction lighting component The chromaticity is controlled separately to strengthen the chromaticity contrast; the above two measures will improve the visibility level of the front object compared with the current high-light position lighting method.

4) Compared with the traditional high light position, the present invention does not require high light poles, and the on-site assembly is simple. At the same time, it is convenient for daily maintenance, and there is no need to close the driveway to replace the lamps. No matter in terms of one-time investment or operating cost, it is better than the current common road lighting. system is greatly reduced.

2. Compared with the existing low light level lighting method

Compared with the low installation height street lamp invention disclosed in CN 201014304Y, the present invention is completely different in several basic features of lighting principle, main function, irradiation direction, irradiation space and operation mode. The function of the reverse lighting component in the present invention is to provide the road surface lighting of the road ahead, the light source and lamps used for the reverse lighting, its irradiation direction is opposite to the driving direction of the lane where it is located, and the irradiation space is the space below the lamp height position and the road surface; same direction The function of the lighting component is to provide motor vehicle drivers with space lighting in front of the road. The light sources and lamps used for lighting in the same direction have the same lighting direction as the driving direction of the lane, and the lighting space is the space above the height of the lights; the above two The first lighting component undertakes all the tasks of road lighting under normal weather conditions.

It is not difficult to see that the lighting method disclosed in CN 201014304Y low installation height street lamp invention is only similar to the one-dimensional component of the present invention—the horizontal lighting component, and the horizontal lighting component in the present invention does not participate in road lighting under normal weather conditions but only As an auxiliary lighting component, the function is to improve the visibility level in complex weather conditions. In the mode of operation, the horizontal lighting does not turn on the light under normal weather, and only turns on when it is raining, foggy, smoky, and hazy; because the illumination mode of the reverse lighting component of the road surface lighting under normal weather conditions in the present invention is reverse without elevation angle Scattering greatly improves the brightness of the road surface in the direction of the driver's line of sight, greatly reduces glare, and significantly improves the longitudinal uniformity. When the same direction lighting component is used together with the reverse lighting, the illumination direction, illumination space and the reverse lighting component have no intersection, so the visibility level of the front object can be improved by strengthening the brightness contrast and chromaticity contrast with the road background; this is in Can't accomplish in the low installation height street lamp invention that CN 201014304Y discloses.

To sum up, the present invention is an independent application research and development based on the characteristics of low-power and high-efficiency light sources. It overcomes the disadvantages of traditional high-light level lighting methods and existing low-light level lighting methods. And problems such as poor longitudinal uniformity, significantly improve lighting efficiency, greatly reduce energy consumption, and at the same time have good road surface brightness, longitudinal uniformity and induction, and there is no "stroboscopic" problem.

Description of drawings

Figure 1 is a schematic diagram of the glare existing in the current high lamp position lighting method;

Figure 2 is a schematic diagram of glare that cannot be eliminated;

Fig. 3 is a schematic diagram of a high light level lighting light curtain;

Figure 4 is the relationship between the average brightness of the road surface and the visibility RP;

Figure 5 is the relationship between brightness uniformity and visibility RP;

Fig. 6 is a schematic diagram of the reverse lighting principle of the present invention;

Fig. 7 is a schematic diagram of the same direction lighting principle of the present invention;

Fig. 8 is a schematic diagram of the horizontal direction of the reverse lighting of the present invention;

Fig. 9 is a schematic diagram of the vertical direction of the reverse lighting of the present invention;

Fig. 10 is a schematic diagram of the horizontal direction of the same lighting in the present invention;

Fig. 11 is a schematic diagram of the vertical direction of the same lighting in the present invention;

Fig. 12 is a schematic diagram of the horizontal direction of the horizontal lighting of the present invention;

Fig. 13 is a schematic diagram of the vertical direction of the vertical lighting of the present invention;

Detailed ways

The present invention will be further described below in conjunction with the examples. It should be understood that the examples are only for the purpose of illustration, and in no way limit the protection scope of the present invention.

The process of optimizing the design of road lighting by applying low-light-level multi-dimensional lighting is as follows:

1. On a section of closed expressway, determine the upper limit of the power density of this type of road according to the design specifications, arrange the lights according to the multi-dimensional lighting method of low light position, and select the light height, light distance, single light power and light distribution according to experience Light source and lamp parameters such as curves;

2. Calculate road surface brightness, uniformity, space illuminance, uniformity, glare index, visibility index and other lighting parameters according to the above parameters;

3. Compare the above lighting parameters with the parameters of the design specification. If fully satisfied, enter 4; if not satisfied, adjust light source and lamp parameters such as lamp height, lamp distance, single lamp power and light distribution curve, and return to 2;

4. Obtain the light source and lamp parameters corresponding to the lighting parameters that meet the specifications, as the basis for the next step of electrical design;

5. Electrical design: including power supply and control; each lighting component can operate independently in normal mode or energy-saving mode, or in combination with different modes;

6. Install anti-glare grilles on the middle isolation belt, install light sources and lamps on the railings and low walls on both sides of the expressway through metal brackets, and debug.

The above description is only illustrative, not restrictive, of the present invention. Those skilled in the art understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, but all will fall within the protection scope of the present invention.

Claims (10)

1. A low light level multi-dimensional road lighting method, characterized in that: the lighting method is composed of multiple dimensional lighting components, including a one-dimensional reverse lighting component, a one-dimensional same direction lighting component, a one-dimensional horizontal lighting component and a one-dimensional lighting component. Dimensional vertical lighting components, each with its own light source and fixture. 2. A low-light level multi-dimensional road lighting method according to claim 1, characterized in that: the lighting components of the multiple dimensions are independent in terms of lighting function, light color range, irradiation direction, and irradiation space. Individual adjustment; In terms of control mode, each lighting component can be operated independently or in combination; In terms of operation mode, normal mode or energy-saving mode can be used; the optimal combination of different control modes and operation modes can exert higher efficiency. 3. A low-light multi-dimensional road lighting method according to claim 1, characterized in that: the light sources and lamps of each lighting component operate independently; the lamps are installed on both sides of the expressway, and the height is not higher than 1.5 m, set separately or integrated into one. 4. A low light level multi-dimensional road lighting method according to claim 1, characterized in that: the basic principle of the reverse lighting is: the road is the main background for the driver to observe the obstacles ahead, and the necessary road brightness is The basic requirements of road lighting, reducing glare and improving brightness uniformity are important tasks of road lighting; the inventor's research shows that: when the light source is close to parallel to the road surface (low light level) at the projection angle, and the direction of illumination is opposite to the direction of driving ( When the reverse lighting) irradiates the road ahead, the driver's line of sight can obtain higher road surface reflection brightness, higher brightness uniformity and can control the glare at a smaller value; in the present invention, the function of the reverse lighting component is to provide necessary Road surface brightness, high brightness uniformity and low glare control; the light source used for reverse lighting, the color temperature is not higher than 4000K, the height is lower than the driver's eye level, and the direction of illumination is opposite to the driving direction of the lane , the irradiation range is 90° to 180° and 180° to 270° in the horizontal direction, and 180° to 220° in the vertical direction. Always fully on during the light-on time) or energy-saving mode (dimming on the basis of normal mode). 5. A low light level multi-dimensional road lighting method according to claim 1, characterized in that: the basic principle of the same direction lighting is: to improve the brightness contrast, chromaticity contrast and The color rendering of the light source is conducive to improving the visibility of obstacles; the inventor's research shows that: when the light source is close to parallel to the road surface (low light level) and the same direction as the driving direction (same direction lighting) to illuminate the front space , higher reflection brightness of obstacles can be obtained in the direction of the driver's line of sight; in the present invention, the function of the same-direction lighting component is to provide the space lighting ahead of the road for the motor vehicle driver with a light source with higher color rendering. When it is used together with the low light level reverse lighting component, the visibility level of obstacles can be improved by strengthening the brightness contrast and chromaticity contrast between the road background and the obstacles ahead; the light source used for the same direction lighting, the height of the motor vehicle driver Near the eye level, the color temperature is higher than the reverse lighting component, the color rendering index is greater than 70, the irradiation direction is the same as the driving direction of the lane, and the irradiation range is 0° to 90° and 270° to 0° in the horizontal direction, and 0° in the vertical direction. ° to 40°, the illumination space is the space above the height of the lamp, and has no intersection with the reverse lighting component; the operating mode is the normal mode (fully turned on in different periods during the normal turn-on time) or energy-saving mode (dimming on the basis of the normal mode). 6. A low-light position multi-dimensional road lighting method according to claim 1, characterized in that: the basic principle of the horizontal lighting is: in rain, fog, haze, smoke and other weather conditions, the light source is directed at the motor vehicle The incident light in the front space will form the phenomenon of "white (fog) wall". When the angle between the driver's line of sight is close to vertical, it can effectively overcome the "white (fog) wall" phenomenon, which is an effective method to solve the road lighting in foggy days; in the present invention, the function of the lateral lighting component is to provide the direction of illumination and the direction of the driver. The line of sight direction is close to the vertical space lighting, which improves the visibility of obstacles ahead under complex weather conditions; the light source and lamps used for horizontal lighting have a spectrum with high penetrating power, and its irradiation direction is consistent with the driving direction of the lane. Vertical, the horizontal direction of the irradiation range is 0° to 180° and 180° to 0°, parallel to the road surface, the irradiation space is the space above and below the height of the lamp and the road surface, intersecting with the reverse lighting and the same lighting components; operating mode It is normal mode (not turned on in normal weather, fully turned on only in rain, fog, smoke, and haze) or energy-saving mode (dimming on the basis of normal mode). 7. A low-light position multi-dimensional road lighting method according to claim 1, characterized in that: the basic principle of the vertical lighting is: when an accident occurs on the road surface and the direction needs to be indicated, a beam of vertical lights with strong penetrating power Direct light can form local landmarks at the irradiation site; in the present invention, the function of the vertical lighting component is to provide indication lighting, and when an accident occurs and rescue is required, the accident location is clearly marked in the air; the light source and lamps used for vertical lighting , the irradiation direction is perpendicular to the road surface, the irradiation range is 87° to 93°, the irradiation space is above the road, there is no intersection with other lighting components, the light color of the light source is monochrome or multiple light colors alternately; the operation mode is not normally on, only Manually open in case of special needs. 8. A low light position multi-dimensional road lighting method according to claim 1, characterized in that: for non-horizontal road sections, due to the shortened visual distance, the power density is higher than that of horizontal road sections; for non-straight road sections, As the visual distance becomes shorter, the power density is higher than that of the straight line. 9. A low-light-level multi-dimensional road lighting method according to claim 1, the key technology of which is to limit the glare; the measure to limit the glare caused by the light source used for reverse lighting to the driving direction is to use an upper cut-off light on the lamp Shading panels and reasonable light distribution; the measures to limit the glare caused by the light source used for the same direction lighting and lateral lighting to the opposite driving direction are to install louvered anti-glare grilles on the middle isolation belt. 10. A low-light level multi-dimensional road lighting method according to claim 1, characterized in that: the lighting method is open, and the lighting components of the above-mentioned multiple dimensions constitute the basic lighting, which is a measure to further improve the lighting function is to add more dimensional lighting components.

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