CN110274192B - Light-cutting type low-level street lamp and manufacturing method thereof - Google Patents

Abstract

The invention relates to an interception type low-level street lamp and a manufacturing method thereof, wherein the interception type low-level street lamp is applied to a night road with a long illumination distance and anti-glare effect, and comprises a lampshade structure and a light emitting device for projecting light through the lampshade structure, the lampshade structure comprises an upper interception device, the lower edge point of the upper interception device is positioned below the sight line of a driver or intersects the sight line of the driver, the light emitting device comprises at least one main optical axis for emitting light, the position of the main optical axis for emitting light is positioned below the lower interception device, and an included angle between the main optical axis for emitting light and a horizon line is alpha. The light-intercepting low-level street lamp has a simple structure and strict requirements, and can provide favorable conditions for safe driving of drivers.

Description

Light-cutting low-position street lamp and manufacturing method thereof

Technical Field

The present invention belongs to the technical field of road lighting, and in particular relates to a light-cutting low-position street lamp with a large height-to-height ratio and anti-glare, and a manufacturing method thereof.

Background Art

There are two common problems with existing low-position street lamp technology: one is that the distance-to-height ratio is too low, resulting in the light being too close and the center of the road being too dark, which cannot meet the requirements of CIE2010 and CJJ45; the other is that there is strong glare, resulting in the threshold index TI exceeding the CIE2010 and CJJ45 standards. The distance-to-height ratio refers to the ratio of the farthest distance of the light projected by the lamp to the height of the lamp hanging. That is, the ratio of the farthest effective lighting distance of the street lamp to the installation height of the lamp.

The conventional low-light street lighting method installs low-power LED light sources directly on road guardrails, isolation belts, and crash barriers. The general installation height is between 0.8 meters and 1.5 meters, and the light is projected from both sides of the road to the middle of the road surface.

The low-position street lamp has a lower lamp position, which partially overcomes the problem of large ineffective lighting area in high-position lighting. However, due to the high power density of the light source, the biggest problem of this lighting method is that drivers near the street lamp lane will feel strong glare.

In order to reduce glare, street lamps must lower the projection angle of light to reduce stray light entering the driver's eyes. However, the driver can still look directly at the light-emitting surface of the street lamp. Although the glare is reduced, it still disturbs the driver. Since the projection angle of the street lamp light is lowered, most of the light is projected onto the road surface near the street lamp, and the central lane of the wide road surface cannot be illuminated, resulting in the phenomenon that the two sides of the road are too bright, but the center of the road is not illuminated, which cannot meet the lighting requirements of the basic section of the expressway.

In 2013, Chinese patent ZL201320002812.0 disclosed a low-position LED street light, which placed the lamp below the driver's line of sight and used the light distribution design of the lens to ensure that the road surface had the necessary brightness, thereby limiting glare by lighting downward. In order to allow more light to be directed to the ground and to allow the angle to be flexibly adjusted, a lens with an asymmetric refraction angle was provided in front of the LED light source.

Analysis shows that this lighting method has two problems: first, all the light is concentrated below the height of 1.2 meters on the road surface, with no upward transition zone, resulting in excessive contrast and poor comfort; second, this method cannot truly eliminate glare, and the driver can still see glare from the "luminous surface" of the front and side lamps, as shown in Figure 1.

In addition, since low-position street lamps illuminate from both sides of the road to the center, due to cost and installation conditions, the distance between street lamps is generally 3 to 8 meters. In order to illuminate the center of the road as much as possible, the beam angle of the street lamp cannot be large, resulting in serious zebra crossings, as shown in Figure 2.

To illuminate the center of the road, the distance-to-height ratio of low-position street lamps should be no less than 10. The current technical standard for optical light distribution of street lamps requires that the protection angle of half-cut light street lamps should be no less than 15°, and the corresponding cut-off angle is 75°. The protection angle makes the maximum distance-to-height ratio not exceed 4.0, as shown in Figure 3.

Although low-position street lamps do not have protection angle requirements, the main contradiction in light distribution lies in increasing the light projection distance and suppressing glare. To reduce the glare of street lamps, it is necessary to use light cutting technology, which means that the overall light effect will be lost, the light projection distance will be shortened, and the brightness requirements of the central part of the road cannot be met; to meet the brightness requirements of the central part of the road, it is necessary to increase the power of the light source, which will cause the light-emitting surface of the street lamp to become brighter and the glare to increase. Therefore, although the distance-to-height ratio of conventional low-position street lamps is greater than that of traditional high-pole street lamps, it generally does not exceed 6.0. The reason for the low distance-to-height ratio is that existing street lamps, whether high or low, use a single (optical) light distribution method, including primary, secondary or even tertiary optical light distribution, which is limited by the refraction angle of the lens, as shown in Figure 4.

The results of using a single light distribution have been proven by many facts that it cannot meet the brightness requirements and anti-glare requirements in the center of the road at the same time.

The solution to the problem of no lighting in the middle of the road cannot be to simply increase the power of the street lamp to meet the brightness requirements in the middle of the road, because this will cause strong glare. Therefore, increasing the distance-to-height ratio is the first thing to be studied in the low-position street lamp lighting technology.

Summary of the invention

The invention provides a light-cutting low-position street lamp and a manufacturing method thereof, which are used to solve the technical problems of glare and small height-to-height ratio of low-position street lamps in the prior art.

A first aspect of the present invention provides a method for manufacturing a light-cutting low-position street lamp, comprising:

The angle between the driver's sight line and the horizontal line is α, and the value range of α is 0°＜α≤4°. The intersection of the driver's sight line and the horizon is taken as the origin, and the vertical line between the driver's sight line and the horizon is translated to the origin as the ordinate; the straight line on the horizon that is in the same vertical plane as the driver's sight line and the ordinate line is taken as the abscissa; the sight function of the driver's sight line is obtained as y=tgαx;

The mass point W slides along the function trajectory of the line of sight function, and obtains point I (x ₁ , y ₁ ) and point K (x ₃ , y ₃ ) in turn, and we can get:

y ₃ -y ₁ =tgα(x ₃ -x ₁ )

y ₃ =y ₁ +tgα(x ₃ -x ₁ );

The light-cutting low-position street lamp includes a light-emitting device and a lampshade structure. The lampshade structure is provided with an upper light-cutting device. The lower edge point of the upper light-cutting device is point P. The point I is located at the joint between the light-emitting device and the lampshade structure. The horizontal coordinates of point K and point P are set equal, that is, the coordinates of point P are P(x ₃ , y ₅ );

When installing the light-cutting low-position street lamp, assuming that the horizontal length of the upper light-cutting plate is a, then a=x ₃ -x ₁ , and the value range of a is 0.05m≤a≤1.0m; and the lower edge point P of the upper light-cutting device is not higher than point K, that is: y ₅ ≤y ₃ .

The production method further comprises the following steps:

The mass point W slides along the driver's line of sight to obtain point J (x ₂ , y ₂ ), which is between point I and point K;

A lower light-cutting device is provided on the lampshade structure, and the upper edge point of the lower light-cutting device of the lampshade structure is set as point Q, and the horizontal coordinates of point J and point Q are set equal, that is, the coordinates of the point are Q (x ₂ , y ₆ );

Assuming the horizontal length of the lower light-cutting plate is b, then b=x ₂ -x ₁ , the value range of b is 0.0m≤b≤0.8m; and the upper edge point Q of the lower light-cutting device is not lower than point J, that is: y ₆ ≥y ₂ .

In this manufacturing method, the vertical length of the light outlet of the lampshade structure is h0, and the horizontal length of the light outlet of the lampshade structure is _d0 , then h0 = _{y5 -y6} , _d0 = _{x3 -x2} ,

From y ₆ ≥y ₂ , y ₅ ≤y ₃ , we can get: h0≤y ₃ -y ₂ =tgα(x ₃ -x ₂ )

≤tgα·d ₀ ;

It can be obtained that: h ₀ /d ₀ ≤tgα;

Assuming that the angle between the line connecting the lower edge point P of the upper light intercepting device and the upper edge point Q of the lower light intercepting device and the horizontal line is β, then h ₀ /d ₀ =tgβ, β≤α; the vertical distance h ₀ between the lower edge point of the upper light intercepting device and the upper edge point of the lower light intercepting device takes a value range of -0.07m≤h ₀ ≤0.07m; the horizontal distance d0 between the lower edge point of the upper light intercepting device and the upper edge point of the lower light intercepting device takes a value range of d ₀ ≥0.0m.

The manufacturing method also includes a process of setting a light-emitting device:

Taking the vertical line between the point K and the horizon as the symmetry axis, obtaining a line of symmetry of the line of sight function of the line of sight where the driver's line of sight is located;

The symmetry line of the sight function is translated horizontally to intersect at point P to obtain the main optical axis, the main optical axis intersects with the ground at point B (x ₉ , 0), and the angle between the main optical axis and the horizon is α;

The main optical axis is extended in reverse to intersect the intersection of the light emitting device and the lampshade structure at point A (x ₁ , y ₈ ). The light emitting device includes at least one main optical axis emitting light at point A, and the emitting direction of the main optical axis emitting light completely coincides with the direction of the main optical axis.

The manufacturing method further includes a process for calculating the distance-to-height ratio of the emitted light at a position where the light-emitting device completely overlaps with the main optical axis:

The emission distance of the emitted light is the horizontal distance from point A to point B, that is, the emission distance of the emitted light d=2x ₃ -x ₁ ; the emission height of the emitted light is the vertical distance between point A and the horizon, that is, the emission height of the emitted light h=y ₈ ; the distance-to-height ratio of the emitted light d/h=(2x ₃ - x ₁ )/y ₈ =cotα; from 0°＜α≤4°, it can be obtained that cotα≥14.3.

The present invention also discloses a light-cutting low-position street lamp, which is used for nighttime roads with long lighting distance and anti-glare, and comprises a lampshade structure and a light-emitting device for projecting light through the lampshade structure, wherein the lampshade structure comprises an upper light-cutting device, wherein the lower edge point of the upper light-cutting device is below the driver's line of sight or intersects with the driver's line of sight, and the light-emitting device comprises at least one main optical axis for emitting light, wherein the position where the main optical axis emits light is below the upper light-cutting device, and the angle between the light emitted by the main optical axis and the horizon is α, and the value of α is 0°<α≦4°.

Wherein, the lampshade structure further comprises a lower light-cutting device, and an upper edge point of the lower light-cutting device is above the driver's line of sight or intersects with the driver's line of sight.

The horizontal distance _d0 between the lower edge of the upper light intercepting device and the upper edge of the lower light intercepting device is in the range of _d0 ≧0.0m, and the vertical distance _h0 between the lower edge of the upper light intercepting device and the upper edge of the lower light intercepting device is in the range of -0.07m≦ _h0 ≦0.07m.

Wherein, the light emitting device comprises a light source, a lens and a reflecting device, and the light source is an LED lamp or a laser lamp.

Wherein, the light emitting device is fixed in the lampshade structure, or the light emitting device is in contact with the lampshade structure, or the light emitting device is separated from the lampshade structure.

From the above embodiments of the present invention, it can be seen that the manufacturing method of the light-cutting low-position street lamp in the present invention limits the relative position relationship between the upper light-cutting plate device and the driver's line of sight through precise calculation, which can not only ensure the normal lighting brightness requirements, but also prevent the driver from being affected by glare during driving. The light-cutting low-position street lamp in the present invention has a simple structure but strict requirements, which can provide favorable conditions for the driver's safe driving.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative labor.

FIG1 is a schematic diagram showing the principle of the driver being glared by the “reflective surface” of the front side lamp in the background technology of the present invention;

FIG2 is a schematic diagram of a real scene of a “zebra crossing” produced by street lamp illumination in the background art of the present invention;

FIG3 is a schematic diagram showing the principle of a current street lamp with a low height-to-height ratio in the background art of the present invention;

FIG4 is a schematic diagram of the lens refraction principle of the optical light distribution method in the background art of the present invention;

FIG5 is a flow chart of a method for manufacturing a light-cutting low-position street lamp according to the present invention;

6 is a schematic diagram of the illumination principle of the light-cutting type low-position street lamp of the present invention when the horizontal length b of the lower light-cutting device is greater than 0;

FIG7 is a schematic diagram showing the calculation and annotation of the distance-to-height ratio of the light-emitting device of the light-cutting low-position street lamp of the present invention;

FIG8 is a schematic diagram of the illumination principle of the first case when the horizontal length b of the lower light-cutting device of the light-cutting low-position street lamp of the present invention is 0;

FIG9 is a schematic diagram of the illumination principle of the second case when the horizontal length b of the lower light-cutting device of the light-cutting low-position street lamp of the present invention is 0;

10 is a schematic diagram of the illumination principle of the third case when the horizontal length b of the lower light-cutting device of the light-cutting low-position street lamp of the present invention is 0;

FIG. 11 is a specific structural diagram of the light-cutting low-position street lamp of the present invention.

DETAILED DESCRIPTION

In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

Referring to Figures 5-6, the present invention discloses a method for manufacturing a light-cutting low-position street lamp, comprising:

S100, establishing a sight line function of the driver's sight line:

The angle between the driver's sight line and the horizontal line is α, and the value range of α is 0°＜α≤4°. The intersection of the driver's sight line and the horizon is taken as the origin, and the vertical line between the driver's sight line and the horizon is translated to the origin as the ordinate; the straight line on the horizon that is in the same vertical plane as the driver's sight line and the ordinate line is taken as the abscissa; the sight function of the driver's sight line is obtained as y=tgαx;

Usually, the observation angle α ranges from 0°≤α≤4° (see CIE 140-2000 ROAD LIGHTING CALCULATIONS and "Lighting Measurement Methods" GB5700-2008, IESNA RP-8-2000 takes 1° as the middle). The critical viewing angle α here is in the above range, and the preferred α value is 1°.

S200, define the relationship between the point on the sight line function and the lampshade structure:

The mass point W slides along the function trajectory of the sight function, and three points I (x ₁ , y ₁ ), K (x ₃ , y ₃ ) and V (x ₄ , y ₄ ) are obtained in sequence. Point V is the critical viewpoint. The light-cutting low-position street lamp includes a light-emitting device and a lampshade structure. The lampshade structure includes an upper light-cutting device. Point I is located at the junction of the light-emitting device and the lampshade structure on the sight function. Point K is placed at the upper light-cutting point where the function trajectory of the sight function intersects with the upper light-cutting device, that is, the position closest to the lower edge point of the upper light-cutting device. The lower edge point of the upper light-cutting device is P (x ₃ , y ₅ ). It can be obtained that:

y ₃ -y ₁ =tg1(x ₃ -x ₁ )

y ₃ =y ₁ +tg1(x ₃ -x ₁ );

In the same way: y ₄ =y ₁ +tg1(x ₄ -x ₁ );

Usually the height from the road surface (working surface) is 1.2m (corresponding to small vehicles) to 1.6m (corresponding to large vehicles) (IESNA RP-8-2000 is set to 1.45m). Usually the observation distance is 60m to 100m, and the middle value is 80m, that is, x ₄ =80, then y ₄ =1.396.

Point I is at the end of the lampshade structure, that is, the location of the light emitting device of the low-position street lamp. The height of the light emitting device of a conventional low-position street lamp ranges from 0.8m to 1.2m, that is, the range of _y1 is 0.8-1.2, preferably _y1 = 1, then _x1 = 57.290.

S300, defining the relative position relationship between the upper light intercepting plate and the sight line function:

When installing a light-cutting low-position street lamp, the horizontal length of the upper light-cutting plate is a, then a=x ₃ -x ₁ , and the value range of a is 0.3m-1.0m; and the lower edge point P of the upper light-cutting device is not higher than point K, that is: y ₅ ≤y ₃ .

Preferably, a＝0.8m, then x ₃ ＝58.090m, and y ₃ ＝1.014, that is, the height of the intersection of the critical line of sight and the upper light-cutting plate of the lampshade structure is 1.014m. The lower edge point P of the upper light-cutting device should block the emission of the light-emitting device at the visible line of sight to prevent the driver from being affected by glare at the critical line of sight, so the height of point P is lower than or equal to the intersection with the critical line of sight, that is, the height of point P is lower than or equal to 1.014m, that is: y ₅ ≤1.014.

S400, defining the relative position relationship between the lower light-cutting plate and the sight line function:

The particle W slides along the function trajectory of the line of sight function to obtain point J (x ₂ , y ₂ ), which is between point I and point K; the upper edge point of the lower light-cutting device of the lampshade structure is set to Q (x ₂ , y ₆ ), and point J is placed at the lower light-cutting point where the line of sight function intersects the lower light-cutting plate; the horizontal length of the lower light-cutting plate is b, then b=x ₂ -x ₁ , and the value range of b is 0.0m-0.4m; and the upper edge point Q of the lower light-cutting device is not below point J, that is: y ₆ ≥y ₂ .

Preferably b=0.2m, then x ₂ =57.490, y ₂ =1.003, that is, the height of the intersection of the critical line of sight and the lower light-cutting plate of the lampshade structure is 1.003m, and the upper edge point J of the lower light-cutting device should block the emission of the light-emitting device at the critical line of sight to avoid the driver being affected by glare in the visible line of sight, so the height of point J is higher than or equal to the intersection of the critical line of sight, that is, the height of point J is higher than or equal to 1.003m, that is: y ₆ ≥1.003.

In this embodiment, in the manufacturing method, the vertical length of the light outlet of the lampshade structure is h0, and the horizontal length of the light outlet of the lampshade structure is _d0 , then _h0 = _y5 - _y6 , _d0 = _x3 - _x2 ,

From y ₆ ≥y ₂ , y ₅ ≤y ₃ , we can obtain: h ₀ ≤y ₃ -y ₂ ＝tgα(x ₃ -x ₂ )

≤tgα·d ₀ ;

It can be obtained that: h ₀ /d ₀ ≤tgα;

Assuming that the angle between the line connecting the lower edge point P of the upper light intercepting device and the upper edge point Q of the lower light intercepting device and the horizontal line is β, then h ₀ /d ₀ =tgβ, β≤α; the vertical distance h ₀ between the lower edge point of the upper light intercepting device and the upper edge point of the lower light intercepting device has a value range of -0.07m≤h ₀ ≤0.07m; the horizontal distance d ₀ between the lower edge point of the upper light intercepting device and the upper edge point of the lower light intercepting device has a value range of d ₀ ≥0.0.

Specifically, h ₀ =y ₅ -y ₆ =1.014-1.003=0.011,

d ₀ =x ₃ -x ₂ =58.090-57.490=0.6,

From y ₆ ≥y ₂ , y ₅ ≤y ₃ , we can obtain: h ₀ ≤y ₃ -y ₂ ＝tg1(x ₃ -x ₂ )

≤tg1d ₀ ;

It can be obtained that: h ₀ /d ₀ =0.010＜tg1.

The specific calculation process of the value range of the vertical distance h0 between the lower edge point of the upper light intercepting device and the upper edge point of the lower light intercepting device is as follows:

The angle between the driver's sight and the horizontal line is α. Since the angle of incidence is equal to the angle of reflection, the angle between the main optical axis and the horizontal line is also α. The lower edge point P (x ₃ , y ₅ ) of the upper light-cutting plate is not higher than the driver's sight, that is, the highest point of point P (x ₃ , y ₅ ) intersects with the driver's sight. The farthest irradiation distance of the main optical axis is restricted by the lower edge point P (x ₃ , y ₅ ) of the upper light-cutting plate. The farthest irradiation distance of the main optical axis intersects with the lower edge point P (x ₃ , y ₅ ) of the upper light-cutting plate, that is, the driver's sight and the main optical axis intersect at the same time at point P (x ₃ , y ₅ ). The upper edge point Q (x ₂ , y ₆ ) of the lower light-cutting plate is not lower than the driver's sight, that is, when the light outlet h0 reaches the maximum value, point Q (x ₂ , y ₆ ) intersects with the driver's sight.

Because the value range of the upper light-cutting plate is 0.05m≤a≤1.0m, and the value range of the lower light-cutting plate is 0.0m≤b≤0.8m, when a＝1.0m, b＝0.0m, _h0 reaches the maximum value.

so:

The value range of _h0 is The value range of α is 0°＜α≤4°, the value range of the upper interception plate a is 0.05m≤a≤1.0m, and the value range of the lower interception plate b is 0.0m≤b≤0.8m. When a＝1.0m, b＝0.0m, h ₀ reaches the maximum value, so the value range of h ₀ is That is, -0.07m≤h ₀ ≤0.07m.

Please further refer to FIG. 7 , taking the vertical line between point K and the horizon as the symmetry axis, the line of symmetry of the line of sight function of the driver's line of sight is obtained;

The symmetry line of the sight function is translated horizontally and intersects at point P to obtain the main optical axis. The main optical axis intersects the ground at point B (x ₉ , 0). The angle between the main optical axis and the horizon is α;

The incident angle and reflection angle of the light emitted from the main optical axis are both α, and the driver's sight angle is also α. When the incident angle and the reflection angle are equal, the energy efficiency of the light source is the highest. Therefore, the closer the light source is to the main optical axis and the more parallel the irradiation direction is to the main optical axis, the higher the energy efficiency. Thus, a higher distance-to-height ratio can be achieved.

The main optical axis is extended in reverse to intersect the intersection of the light emitting device and the lampshade structure at point A (x ₁ , y ₈ ). The light emitting device includes at least one main optical axis emitting light at point A, and the emitting direction of the main optical axis emitting light completely coincides with the direction of the main optical axis.

The emission distance of the emitted light is the horizontal distance from point A to point B, that is, the emission distance of the emitted light is d= _2x3 - _x1 ; the emission height of the emitted light is the vertical distance between point A and the horizon, that is, the emission height of the emitted light is h= _y8 ; the distance-to-height ratio of the emitted light is d/h=( _2x3 - _x1 )| _{/y8=cotα=cot1=54.545} >>10.

The cut-off low-position street lamp of the present invention has a distance-to-height ratio far greater than 10, and a light projection distance far greater than the light projection distance of the lamps in the prior art, thereby effectively avoiding the light illumination effect of the "zebra crossing". If the light brightness is not enough, the power of the light-emitting device can be increased according to the demand, and the upper cut-off plate and the lower cut-off plate are used together to form a physical anti-glare structure, so that the driver will not be affected by glare at any angle.

In this embodiment, the horizontal length A of the lower light-cutting device of the present invention is ≥ 0. Please refer to FIG6 further, A＞0, the lower light-cutting device of the present invention extends from the end of the lampshade structure and has a certain length, and the upper edge of the lower light-cutting device needs to be at the same horizontal position as the critical line of sight. A＝0, there are three cases at this time, please refer to FIG8 further, in the first case, the light-emitting device is above the critical line of sight and has no intersection with the critical line of sight, then the lower light-cutting device is not required; please refer to FIG9 further, in the second case, the light-emitting device has a certain intersection with the critical line of sight, then the lower light-cutting device is a vertical baffle, at this time the lower light-cutting device is connected to the light-emitting device to ensure that the upper edge of the lower light-cutting device is above the critical line of sight; please refer to FIG10 further, in the third case, the light-emitting device has a certain intersection with the critical line of sight, then the lower light-cutting device is a vertical baffle, at this time the lower light-cutting device is connected to the lampshade structure, and has no connection relationship with the light-emitting device, to ensure that the upper edge of the lower light-cutting device is above the critical line of sight.

A second aspect of the present invention provides a light-cutting low-position street lamp, which is used for nighttime roads with long lighting distance and anti-glare. The light-cutting low-position street lamp is manufactured based on a manufacturing method of the light-cutting low-position street lamp, and includes a lampshade structure and a light-emitting device that projects light through the lampshade structure. The lampshade structure includes an upper light-cutting device, and the lower edge point of the upper light-cutting device is below the driver's line of sight or intersects with the driver's line of sight. The light-emitting device includes at least one main optical axis that emits light, and the position where the main optical axis emits light is below the upper light-cutting device, and the angle between the light emitted by the main optical axis and the horizon is α.

In this embodiment, the lampshade structure further includes a lower light-cutting device, and an upper edge point of the lower light-cutting device is above the driver's line of sight or intersects with the driver's line of sight.

In this embodiment, the horizontal distance _d0 between the lower edge point of the upper light intercepting device and the upper edge point of the lower light intercepting device is in the range of _d0 ≧0m, and the vertical distance _h0 between the lower edge point of the upper light intercepting device and the upper edge point of the lower light intercepting device is in the range of _h0 . The value range of α is 0°<α≦4°, the value range of the upper light intercepting plate a is 0.05m≤a≤1.0m, so the value range of h ₀ is That is, -0.07m≦h ₀ ≦0.07m.

In this embodiment, the light emitting device includes a light source, a lens, and a reflective device, and the light source is an LED lamp or a laser lamp.

Please continue to refer to Figure 11. The specific structure of the light-cutting low-position street lamp of the present invention includes a first light-emitting device 10, a second light-emitting device 20, a grille 30, a driver 40 and a shell 50. A first upper light-cutting plate 11 is provided on a first side wall 51 of the shell 50 to facilitate the first light-emitting device 10 to emit light, and a second upper light-cutting plate 21 is provided on a second side wall 52 of the shell 50 corresponding to the first side wall 51 to facilitate the second light-emitting device 20 to emit light.

The first light-emitting device 10 is directly or indirectly fixed on the second side wall 52, a first lower light-cutting device 12 is provided below the first light-emitting device 10, the second light-emitting device 20 is directly or indirectly fixed on the first side wall 51, and the first light-emitting device 10 and the second light-emitting device 20 have different heights, and the light-emitting area of the first light-emitting device 10 is connected to the light-emitting area of the second light-emitting device 20, thereby realizing all-round lighting below the driver's line of sight on the road.

The first light-emitting device 10 has at least one first main optical axis illumination light 13 with an angle α with the horizontal plane, and the second light-emitting device 20 has at least one second main optical axis illumination light 23 with an angle α with the horizontal plane. The first main optical axis illumination light 13 is below the lower edge of the first upper light-cutting plate 11, and the first main optical axis illumination light 13 is above the upper edge of the first lower light-cutting device 12; the second main optical axis illumination light 23 is below the lower edge of the second upper light-cutting plate 21.

The low-position street lamp of the present invention adopts a composite light distribution + anti-glare structure. The anti-glare structure completely blocks the driver's sight, so that the driver cannot directly shine on the luminous surface of the luminous device, and the driver cannot see any internal reflective surface. The internal luminous device is not limited by the anti-glare angle, and uses a very small vertical angle for illumination. The main optical axis is close to parallel to the road surface, and the light is projected to the road surface as far as possible, with a distance-to-height ratio greater than 10.

The low-position street lamp of the present invention adopts composite light distribution technology, the light spot is rectangular, and the vertical beam angle is extremely small, so that as much light as possible passes through the anti-glare structure and is projected onto the road surface at a long distance. The light efficiency of multi-dimensional low-position street lamps is improved. The forward lighting + reverse lighting mode is adopted, and a small angle is formed with the driving direction of the road. The high-height-to-distance ratio technology makes the light form a large-area light spot on the road surface, and the rectangular light spots in multiple directions are superimposed on the road to eliminate zebra crossings.

Furthermore, the light emitting device is fixed in the lampshade structure, or the light emitting device is in contact with the lampshade structure, or the light emitting device is separated from the lampshade structure. The relative angle θ between the light emitting device and the lampshade structure has a value range of (0°, 90°). The specific positions of the light emitting device and the lampshade structure are not limited, the light emitting device and the lampshade structure are detachably fixedly connected, and the distance between the two can be greater than zero, less than zero, or equal to zero.

In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

The above is a description of the technical solution provided by the present invention. For those skilled in the art, according to the ideas of the embodiments of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims (4)

1. A method for manufacturing a light-cutting low-position street lamp, characterized by comprising: The angle between the driver's line of sight and the horizontal line is , The value range of is 0°<α≦4°, with the intersection of the driver's sight and the horizon as the origin, and the vertical line between the driver's sight and the horizon translated to the origin as the ordinate; the straight line on the horizon that is in the same vertical plane as the driver's sight and the ordinate line is taken as the abscissa; the sight function of the driver's sight is obtained as follows: ; The particle W slides along the functional trajectory of the line of sight function, and the points And point , we can get: ; The light-cutting low-position street lamp includes a light-emitting device and a lampshade structure, wherein the lampshade structure is provided with an upper light-cutting device, the lower edge point of the upper light-cutting device is point P, and the point I is located at the joint between the light-emitting device and the lampshade structure, and the horizontal coordinates of the point K and the point P are set equal, that is, the coordinates of the point P are ; Install the light-cutting low-position street lamp, assuming that the horizontal length of the upper light-cutting plate is a, then a The value range of a is 0.05m 1.0 m; and the lower edge point P of the upper light-cutting device is not higher than point K, that is: ; The production method also includes the following steps: Particle W slides along the driver's line of sight, and point , point J is between point I and point K; A lower light-cutting device is provided on the lampshade structure, and the upper edge point of the lower light-cutting device of the lampshade structure is set as point Q, and the horizontal coordinates of point J and point Q are set equal, that is, the coordinates of point J are ; Assume the horizontal length of the lower light-cutting plate is b, then , the value range of b is 0.0m 0. 8m; and the upper edge point Q of the lower light-cutting device is not lower than point J, that is: ; In the manufacturing method, the vertical length of the light outlet of the lampshade structure is h0, and the horizontal length of the light outlet of the lampshade structure is d0. , , Depend on , , can be obtained = 0; We can get: h0/d ; Assume that the angle between the line connecting the lower edge point P of the upper light intercepting device and the upper edge point Q of the lower light intercepting device and the horizontal line is β, then h0/d0= , ; The vertical distance h0 between the lower edge point of the upper light intercepting device and the upper edge point of the lower light intercepting device has a value range of -0.07m≦h0≦0.07m; The horizontal distance d0 between the lower edge point of the upper light intercepting device and the upper edge point of the lower light intercepting device has a value range of d0≧0.0m; The manufacturing method also includes a process of setting a light-emitting device: Taking the vertical line between the point K and the horizon as the symmetry axis, obtaining a line of symmetry of the line of sight function of the line of sight where the driver's line of sight is located; The symmetry line of the sight function is translated horizontally to intersect at point P to obtain the main optical axis, and the main optical axis intersects the ground at point B. , the angle between the principal optical axis and the horizon is ; The main optical axis is extended in the reverse direction so that it intersects the intersection of the light emitting device and the lampshade structure at point A. , the light emitting device includes at least one main optical axis emitting light at point A, and the emission direction of the light emitted by the main optical axis completely coincides with the direction of the main optical axis; The manufacturing method also includes a process for calculating the distance-to-height ratio of the emitted light at a position where the light-emitting device completely overlaps with the main optical axis: The emission distance of the emitted light is the horizontal distance from point A to point B, that is, the emission distance d of the emitted light = , the emission height of the emitted light is the vertical distance between the point A and the horizon, that is, the emission height of the emitted light h= ; The distance-to-height ratio of the emitted light d/h= = From 0°<α≦4°, we can get: . 2. A light-cutting low-position street lamp, characterized in that it is used for nighttime roads with long lighting distance and anti-glare. The light-cutting low-position street lamp is manufactured based on the manufacturing method of the light-cutting low-position street lamp described in claim 1, and includes a lampshade structure and a light-emitting device that projects light through the lampshade structure. 3. The light-cutting low-position street lamp according to claim 2 is characterized in that the light-emitting device comprises a light source, a lens and a reflecting device, and the light source is an LED lamp or a laser lamp. 4. The light-cutting low-position street lamp according to claim 2 is characterized in that the light-emitting device is fixed in the lampshade structure, or the light-emitting device is in contact with the lampshade structure, or the light-emitting device is separated from the lampshade structure.