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

Light-cutting type low-level street lamp and manufacturing method thereof Download PDF

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CN110274192B
CN110274192B CN201910559889.XA CN201910559889A CN110274192B CN 110274192 B CN110274192 B CN 110274192B CN 201910559889 A CN201910559889 A CN 201910559889A CN 110274192 B CN110274192 B CN 110274192B
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light
point
line
interception
sight
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CN110274192A (en
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赵海天
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Shenzhen University
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Shenzhen University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/90—Methods of manufacture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/08—Lighting devices intended for fixed installation with a standard
    • F21S8/081—Lighting devices intended for fixed installation with a standard of low-built type, e.g. landscape light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/103—Outdoor lighting of streets or roads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

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 type low-level street lamp and manufacturing method thereof
Technical Field
The invention belongs to the technical field of road illumination, and particularly relates to an anti-dazzle light-interception type low-level street lamp with a large distance-to-height ratio and a manufacturing method thereof.
Background
The existing low-level street lamp technology has two common problems: firstly, the distance-to-height ratio is too low, the result is too close to the light projection, and the center of the road is too dark to meet the requirements of CIE2010 and CJJ 45; secondly, there is a stronger glare, with the result that the threshold index TI exceeds the CIE2010 and CJJ45 standards. The aspect ratio refers to the ratio of the furthest distance of the projected light from the lamp to the suspended height of the lamp. I.e. the ratio of the furthest effective illumination distance of the street lamp to the mounting height of the lamp.
The conventional low-light street lamp illumination mode is to directly install a low-power LED light source on a road guardrail, a separation belt and an anti-collision wall, wherein the installation height is generally between 0.8 meter and 1.5 meters, and the light is projected from two sides of a road to the middle of the road surface.
The lamp position of the low-level street lamp is reduced, and the problem of a larger ineffective illumination area existing in a high-level illumination mode is partially solved. However, the greatest problem with this illumination is that drivers approaching the roadway of the street lamp feel intense glare due to the excessively high power density of the light source.
In order to reduce glare, the street lamps must reduce the angle of projection of the light to reduce stray light entering the eyes of the driver. However, the driver can still directly look at the light-emitting surface of the street lamp, and the glare is reduced, but the driver is still disturbed. Because the projection angle of the road lamp light is low, most of light is projected on the road surface close to the street lamp, the central lane of the wide road surface cannot be illuminated, so that the two sides of the road are too bright, the road center is not illuminated, and the requirement of illumination of the basic road section of the expressway cannot be met.
In 2013, chinese patent ZL201320002812.0 discloses an LED low-level street lamp, in which a lamp is placed below the sight of a driver, and the light distribution design of a lens is used to make the road surface obtain necessary brightness, so as to limit glare in a downward illumination manner. In order to make more light rays irradiate to the ground, the angle can be flexibly adjusted, and a lens with an up-down asymmetric refraction angle is arranged in front of the LED light source.
Analysis shows that there are two problems with this illumination: firstly, the whole illumination is concentrated below the height of 1.2 meters on the road surface, an upward transition area is avoided, the contrast is overlarge, and the comfort is poor; secondly, the method can not truly eliminate the glare, and the driver can still see the glare from the luminous surface of the front side lamp, as shown in fig. 1.
In addition, since the low-level street lamps are irradiated from both sides of the road to the center, the distance between the street lamps is generally 3 meters to 8 meters due to the limitation of cost and installation conditions, and the beam angle of the street lamps cannot be large in order to illuminate the road center as much as possible, resulting in serious zebra stripes, as shown in fig. 2.
To illuminate the road surface in the center of the road, the distance to height ratio of the low-level street lamp is not less than 10. The current street lamp optical light distribution technical standard requires that the protection angle of the half-cut street lamp is not lower than 15 degrees, the corresponding cut-off angle is 75 degrees, and the protection angle enables the maximum distance-to-height ratio not to exceed 4.0, as shown in fig. 3.
Although the low-level street lamp has no protection angle requirement, the main contradiction in the light distribution aspect is to increase the light projection distance and inhibit glare. The light interception technology is necessarily adopted to reduce the glare of the street lamp, which means that the light effect of the whole street lamp is lost, the light projection distance is shortened, and the brightness requirement of the central part of the road is not met; in order to meet the brightness requirement of the central part of the road, the power of the light source is increased, which leads to the brightness of the luminous surface of the street lamp and the increase of glare. Therefore, the pitch height ratio of conventional low-pole street lamps, although larger than that of conventional high-pole street lamps, is generally not more than 6.0. The reason for the low distance-to-height ratio is that the existing street lamp, whether the street lamp is a high-order street lamp or a low-order street lamp, adopts a single (optical) light distribution method, comprises primary, secondary and tertiary optical light distribution, and is limited by the refraction angle of the lens, as shown in fig. 4.
The result of adopting single light distribution is proved by a large number of facts that the common requirements of the brightness requirement and the anti-glare requirement of the road center cannot be met at the same time.
The solution to the problem of no illumination in the center of the road cannot meet the central brightness requirement of the road by simply increasing the power of the street lamps, which can lead to intense glare. Therefore, increasing the aspect ratio is the first aspect of research in low-order street lamp light distribution technology.
Disclosure of Invention
The invention provides a light-cut low-level street lamp and a manufacturing method thereof, which are used for solving the technical problems of low-level street lamp glare and small distance-to-height ratio in the prior art.
The first aspect of the invention provides a manufacturing method of a light-cut low-level street lamp, which comprises the following steps:
The included angle between the sight line of the driver and the horizontal line is alpha, the value range of alpha is more than 0 degrees and less than or equal to 4 degrees, the intersection point of the sight line of the driver and the horizontal line is taken as an origin, and the vertical line between the sight line of the driver and the horizontal line translates to the origin position to be taken as an ordinate; taking a straight line on the horizon and on the same vertical face as the line of sight of the driver and the vertical coordinate line as an abscissa; obtaining a sight line function where the sight line of the driver is located as y=tg alpha x;
The particle W slides along the functional trajectory of the line-of-sight function, resulting in point I (x 1,y1) and point K (x 3,y3) in turn, to obtain:
y3-y1＝tgα(x3-x1)
y3＝y1+tgα(x3-x1)；
The manufacturing method of the light-cut type low-level street lamp comprises a light-emitting device and a lamp shade structure, wherein the lamp shade structure is provided with an upper light-cut device, the lower edge point of the upper light-cut device is a point P, the point I is positioned at the joint of the light-emitting device and the lamp shade structure, and the point K is equal to the abscissa of the point P, namely the coordinate of the point P is P (x 3,y5);
Installing the light-interception type low-level street lamp, wherein if the horizontal length of the upper light-interception plate is a, the value range of a=x 3-x1, and a is more than or equal to 0.05m and less than or equal to 1.0m; and the lower edge point P of the upper light interception device is not higher than the point K, namely: y 5≤y3.
The manufacturing method further comprises the following steps:
The particle W slides along the sight line of the driver to obtain a point J (x 2,y2), wherein the point J is positioned between a point I and a point K;
Setting a lower light interception device on the lampshade structure, setting the upper edge point of the lower light interception device of the lampshade structure as a point Q, wherein the point J is equal to the abscissa of the point Q, namely the coordinate of the point is Q (x 2,y6);
Setting the horizontal length of the lower light interception plate as b, wherein b=x 2-x1, and the value range of b is more than or equal to 0.0m and less than or equal to 0.8m; and the upper edge point Q of the lower light interception device is not lower than the point J, namely: y 6≥y2.
In the manufacturing method, the vertical length of the light outlet of the lampshade structure is h0, the horizontal length of the light outlet of the lampshade structure is d 0, then h0=y 5-y6,d0＝x3-x2,
From y 6≥y2,y5≤y3, it is possible to obtain: h0.ltoreq.y 3-y2＝tgα(x3-x2
≤tgα·d0；
The method can obtain: h 0/d0 is less than or equal to tgalpha;
Let the included angle between the horizontal line and the line of the upper edge point P of the upper light interception device and the upper edge point Q of the lower light interception device be beta, h 0/d0 = tg beta, beta is less than or equal to alpha; the vertical distance h 0 between the lower edge point of the upper light interception device and the upper edge point of the lower light interception device is in a value range of-0.07 m- 0 -0.07 m; the horizontal distance d0 between the lower edge point of the upper light interception device and the upper edge point of the lower light interception device is in a value range of d 0 to be more than or equal to 0.0m.
The manufacturing method further comprises the process of arranging the light-emitting device:
taking a vertical line between the point K and the horizon as a symmetry axis to obtain a line of sight function symmetry line of a line function where the driver line of sight is located;
translating the symmetry line of the sight line function along the horizontal direction to intersect at a point P to obtain a main optical axis, wherein the main optical axis intersects with the ground at a point B (x 9, 0), and the included angle between the main optical axis and the horizontal line is alpha;
and reversely extending the main optical axis to be intersected at a point A (x 1,y8) at the intersection of the light emitting device and the lampshade structure, wherein the light emitting device comprises at least one main optical axis emitting ray at the point A, and the emitting direction of the main optical axis emitting ray is completely coincident with the direction of the main optical axis.
The manufacturing method further comprises the step of calculating the height ratio of the emitted light distance at the position where the light emitting device and the main optical axis completely coincide:
The emission distance of the emitted light is the horizontal distance from the point A to the point B, namely the emission distance d=2x 3-x1 of the emitted light, and the emission height of the emitted light is the vertical distance between the point A and the horizon, namely the emission height h=y 8 of the emitted light; the distance-height ratio d/h= (2x 3- x1)/y8 =cotα; obtainable from 0 ° < α. Ltoreq.4°, cotα. Ltoreq.14.3).
The invention also discloses a light-interception type low-level street lamp which is applied to a night road with a long illumination distance and anti-glare, and comprises a lamp shade structure and a light-emitting device for projecting light through the lamp shade structure, wherein the lamp shade structure comprises an upper light-interception device, the lower edge point of the upper light-interception device is positioned below the sight line of a driver or is intersected with 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 the light is positioned below the upper light-interception device, the included angle between the main optical axis for emitting the light and the horizon is alpha, and the value of alpha is 0 degree < alpha is less than or equal to 4 degrees.
The lampshade structure further comprises a lower light interception device, and the upper edge point of the lower light interception device is located above the sight line of the driver or intersects the sight line of the driver.
The value range of the horizontal distance d 0 between the lower edge point of the upper light interception device and the upper edge point of the lower light interception device is d 0 +.0.0 m, and the value range of the vertical distance h 0 between the lower edge point of the upper light interception device and the upper edge point of the lower light interception device is-0.07 m +.h 0 +.0.07 m.
The light-emitting device comprises a light source, a lens and a reflecting device, wherein the light source is an LED lamp or a laser lamp.
The light-emitting device is fixed in the lampshade structure, or is in contact with the lampshade structure, or is separated from the lampshade structure.
According to the embodiment of the invention, the manufacturing method of the interception type low-level street lamp limits the relative position relation between the upper interception plate device and the sight of the driver through accurate calculation, so that the requirement of normal illumination brightness can be met, and meanwhile, the driver can be prevented from being influenced by glare in the driving process. The light-intercepting low-level street lamp has a simple structure and strict requirements, and can provide favorable conditions for safe driving of drivers.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of a driver's glare from a front side luminaire "reflective surface" in accordance with the background art of the present invention;
FIG. 2 is a schematic view of a road lamp illuminating to generate a "zebra stripes" in the background of the invention;
FIG. 3 is a schematic diagram of the principle of low pitch of the existing street lamp in the background art of the invention;
FIG. 4 is a schematic view of the principle of lens refraction of the optical light distribution method in the background of the invention;
FIG. 5 is a flow chart of a method for manufacturing the cut-off low-level street lamp of the invention;
FIG. 6 is a schematic view of the lower light interception device of the light interception type low street lamp according to the present invention when the horizontal length b > 0;
FIG. 7 is a schematic diagram of calculating and labeling the distance-to-height ratio of a light emitting device of the light-cut low-level street lamp;
fig. 8 is a schematic view of the first case irradiation when the horizontal length b=0 of the lower light interception device of the light interception type low-level street lamp according to the present invention;
Fig. 9 is a schematic diagram of a second case irradiation when the horizontal length b=0 of the lower light interception device of the light interception type low-level street lamp according to the present invention;
Fig. 10 is a schematic view of a third case illumination when the horizontal length b=0 of the lower light interception device of the light interception type low-level street lamp according to the present invention;
Fig. 11 is a specific structural view of the cut-off low-level street lamp of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention will be clearly described in conjunction with the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 5-6, the invention discloses a method for manufacturing a light-interception type low-level street lamp, which comprises the following steps:
S100, establishing a sight line function of the sight line of the driver:
The included angle between the sight line of the driver and the horizontal line is alpha, the value range of alpha is more than 0 degrees and less than or equal to 4 degrees, the intersection point of the sight line of the driver and the horizontal line is taken as an origin, and the vertical line between the sight line of the driver and the horizontal line translates to the origin position to be taken as an ordinate; taking a straight line on the horizon and on the same vertical face as the line of sight of the driver and the vertical coordinate line as an abscissa; obtaining a sight line function where the sight line of the driver is located as y=tg alpha x;
the value of the angle of observation alpha is generally more than or equal to 0 DEG and less than or equal to 4 DEG, the range of the angle of observation alpha is (see CIE 140-2000ROAD LIGHTING CALCULATIONS, GB5700-2008, IESNA RP-8-2000, center of the measurement method of illumination) 1 DEG, the critical viewing angle alpha is in the above range, and the value of alpha is preferably 1 deg.
S200, defining the relation between points on the sight line function and the lampshade structure:
The particle W slides along the function track of the sight line function to sequentially obtain three points I (x 1,y1),K(x3,y3) and V (x 4,y4), the V point is a critical viewpoint, the manufacturing cut-off type low-level street lamp comprises a light emitting device and a lamp shade structure, the lamp shade structure comprises an upper cut-off device, the point I is positioned at the joint of the light emitting device and the lamp shade structure on the sight line function, the point K is positioned at the upper cut-off point where the function track of the sight line function intersects with the upper cut-off device, namely the position closest to the lower edge point of the upper cut-off device, and the lower edge point of the upper cut-off device is P (x 3,y5); the method can obtain:
y3-y1＝tg1(x3-x1)
y3＝y1+tg1(x3-x1)；
And (3) the same principle: y 4＝y1+tg1(x4-x1);
The height from the road surface (working surface) is usually 1.2m (corresponding to trolley) to 1.6m (corresponding to cart) (IESNA RP-8-2000 is set to 1.45 m), the observation distance is usually 60m to 100m, the median value is 80m, that is, x 4 =80, and y 4 =1.396.
The point I is at the end of the lamp shade structure, i.e. the position where the light emitting device of the low street lamp is arranged, the height of the light emitting device of the conventional low street lamp ranges from 0.8m to 1.2m, i.e. y 1 ranges from 0.8 to 1.2, preferably y 1 =1, and x 1 = 57.290.
S300, limiting the relative position relation between the upper light interception plate and the sight line function:
Installing an interception type low-level street lamp, wherein the horizontal length of an upper interception plate is a, and the value range of a=x 3-x1, namely 0.3m-1.0m; and the lower edge point P of the upper light interception device is not higher than the point K, namely: y 5≤y3.
Preferably a=0.8m, then x 3 = 58.090m, and y 3 =1.014 is obtained, i.e. the height of the position where the critical line of sight meets the light interception plate on the lampshade structure is 1.014m. The lower edge point P of the upper light interception device should block the light emission of the light emitting device at the visual line of sight to avoid the driver from being affected by glare at the critical line of sight position, so the height of the point P is lower than or equal to the junction with the critical line of sight, i.e. the height of the point P is lower than or equal to 1.014m, i.e.: y 5 is less than or equal to 1.014.
S400, limiting the relative position relation between the lower light interception plate and the sight line function:
The particle W slides along the function track of the line-of-sight function to obtain a point J (x 2,y2), wherein the point J is positioned between the point I and the point K; setting the upper edge point of a lower light interception device of the lampshade structure as Q (x 2,y6), and setting a point J at a lower light interception point where a sight line function intersects with a lower light interception plate; the horizontal length of the lower light interception plate is b, b=x 2-x1, and the value range of b is 0.0m-0.4m; and the upper edge point Q of the lower light cutoff is not below point J, i.e.: y 6≥y2.
Preferably b=0.2m, then x 2＝57.490,y2 =1.003, i.e. the height of the intersection of the critical line of sight and the lower light-intercepting plate of the lampshade structure is 1.003m, the upper edge point J of the lower light-intercepting device should block the light-emitting device at the critical line of sight from emitting so as to avoid the driver from being affected by glare in the visual line of sight, so the height of the point J is higher than or equal to the intersection of the critical line of sight, i.e. the height of the point J is higher than or equal to 1.003m, i.e.: y 6 is greater than or equal to 1.003.
In this embodiment, in the manufacturing method, the vertical length of the light outlet of the lampshade structure is h0, the horizontal length of the light outlet of the lampshade structure is d 0, h 0＝y5-y6,d0＝x3-x2,
From y 6≥y2,y5≤y3, it is possible to obtain: h 0≤y3-y2＝tgα(x3-x2)
≤tgα·d0；
The method can obtain: h 0/d0 is less than or equal to tgalpha;
Let the included angle between the horizontal line and the line of the upper edge point P of the upper light interception device and the upper edge point Q of the lower light interception device be beta, h 0/d0 = tg beta, beta is less than or equal to alpha; the vertical distance h 0 between the lower edge point of the upper light interception device and the upper edge point of the lower light interception device is within the range of-0.07 m- 0 -0.07 m; the horizontal distance d 0 between the lower edge point of the upper light interception device and the upper edge point of the lower light interception device is d 0 more than or equal to 0.0.
Specifically, h 0＝y5-y6 = 1.014-1.003 = 0.011,
d0＝x3-x2＝58.090-57.490＝0.6，
From y 6≥y2,y5≤y3, it is possible to obtain: h 0≤y3-y2＝tg1(x3-x2)
≤tg1d0；
The method can obtain: h 0/d0 = 0.010 < tg1.
The specific calculation process of the vertical distance h0 between the lower edge point of the upper light interception device and the upper edge point of the lower light interception device is as follows:
The included angle between the driver's line of sight and the horizontal line is alpha, and because the incident angle is equal to the reflection angle, the included angle between the main optical axis and the horizontal line is also alpha. The lower edge point P (x 3,y5) of the upper light cutoff plate is not higher than the driver's line of sight, i.e., the highest point of the point P (x 3,y5) intersects the driver's line of sight. The furthest illumination distance of the main optical axis is limited by the lower edge point P (x 3,y5) of the upper light interception plate, and the furthest illumination distance main optical axis ray intersects with the lower edge point P (x 3,y5) of the upper light interception plate, namely the driver sight line intersects with the main optical axis at the point P (x 3,y5) at the same time. The upper edge point Q (x 2,y6) of the lower light interception plate is not lower than the driver sight line, namely, when the light outlet h0 takes the maximum value, the point Q (x 2,y6) intersects with the driver sight line.
Because the value range of a is more than or equal to 0.05m and less than or equal to 1.0m of the upper light interception plate, and the value range of b is more than or equal to 0.0m and less than or equal to 0.8m of the lower light interception plate, when a=1.0 m and b=0.0 m, h 0 takes the maximum value.
So that:
h 0 has a value range of Alpha is more than 0DEG and less than or equal to 4 DEG, a value range of the upper light interception plate a is more than or equal to 0.05m and less than or equal to 1.0m, b value range of the lower light interception plate b is more than or equal to 0.0m and less than or equal to 0.8m, when a=1.0 m and b=0.0 m, h 0 is the maximum value, so the value range of h 0 isI.e., -0.07 m.ltoreq.h 0.ltoreq.0.07 m.
Referring to fig. 7, a line of sight function symmetry line of a line of sight function where the line of sight of the driver is located is obtained by taking a perpendicular line between the point K and the horizon line as a symmetry axis;
Translating the intersection of the symmetry line of the sight line function at a point P along the horizontal direction to obtain a main optical axis, wherein the main optical axis intersects with the ground at a point B (x 9, 0), and the included angle between the main optical axis and the horizon is alpha;
The incidence angle and the reflection angle of the light emitted from the position of the main optical axis are both alpha, and the included angle of the sight line of the driver is also alpha. When the angle of incidence is equal to the angle of reflection, the energy efficiency of the light source is highest. Therefore, the closer the light source is located to the main optical axis and the more parallel the irradiation direction is to the main optical axis, the higher the energy efficiency is. Thus, a higher aspect ratio can be achieved.
The main optical axis is reversely prolonged to be intersected at a point A (x 1,y8) at the intersection of the light emitting device and the lampshade structure, the light emitting device comprises at least one main optical axis emitting ray at the point A, and the emitting direction of the main optical axis emitting ray is completely coincident with the direction of the main optical axis.
The emission distance of the emitted light is the horizontal distance from the point A to the point B, namely the emission distance d=2x 3-x1 of the emitted light, and the emission height of the emitted light is the vertical distance between the point A and the horizon, namely the emission height h=y 8 of the emitted light; the aspect ratio d/h= (2x 3-x1)|/y8 =cotα=cot1= 54.545> > 10 of the emitted light.
The cut-off type low-level street lamp has the distance-to-height ratio of more than 10 and the light projection distance of more than that of the lamp in the prior art, so that the generation of the light irradiation effect of a zebra crossing can be well avoided. If the illumination brightness is insufficient, the power of the light-emitting device can be increased according to the requirement, the upper light-interception plate and the lower light-interception plate are matched for use, a physical anti-dazzle structure is formed, and a driver cannot be influenced by glare at any angle.
In this embodiment, the horizontal length A of the lower light interception device of the invention is equal to or greater than 0. Referring to fig. 6, a > 0, the lower light-intercepting 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-intercepting device needs to be at the same horizontal position as the critical line of sight. A=0, three situations exist at this time, please further refer to fig. 8, in the first situation, if the light emitting device is above the critical line of sight and has no intersection point with the critical line of sight, then the existence of the lower light interception device is not needed; referring to fig. 9, in the second case, if the light emitting device has a certain intersection point with the critical line of sight, the lower light interception device is a vertical baffle, and the lower light interception device is connected with the light emitting device at this time, so as to ensure that the upper edge of the lower light interception device is above the critical line of sight; referring to fig. 10, in the third case, the light emitting device and the critical line of sight have a certain intersection point, and the lower light interception device is a vertical baffle, and the lower light interception device is connected with the lampshade structure and has no connection relationship with the light emitting device, so as to ensure that the upper edge of the lower light interception device is above the critical line of sight.
The second aspect of the invention provides a light-cut-off type low-level street lamp which is applied to a night road with long illumination distance and anti-dazzle, and is manufactured based on a manufacturing method of the light-cut type low-level street lamp, comprising a lampshade structure and a light-emitting device which projects light through the lampshade structure, wherein the lampshade structure comprises an upper light-cut-off device, the lower edge point of the upper light interception device is positioned below the sight line of the driver or intersects the sight line of the driver, the light-emitting device comprises at least one main optical axis emission ray, the position of the main optical axis emission ray is positioned below the upper light interception device, and the included angle between the main optical axis emission ray and the horizon is alpha.
In this embodiment, the lamp shade structure further includes a lower light interception device, and an upper edge point of the lower light interception device is located above or intersecting the driver's line of sight.
In the present embodiment, the horizontal distance d 0 between the lower edge point of the upper light-interception device and the upper edge point of the lower light-interception device is d 0 +.0m, the vertical distance h 0 between the lower edge point of the upper light-interception device and the upper edge point of the lower light-interception device is h 0 The value range of alpha is 0 degree < alpha less than or equal to 4 degrees, and the value range of the upper light interception plate a is 0.05m less than or equal to a less than or equal to 1.0m, so the value range of h 0 is I.e., -0.07m +.h 0 +.0.07 m.
In this embodiment, the light emitting device includes a light source, a lens, and a light reflecting device, where the light source is an LED lamp or a laser lamp.
With continued reference to fig. 11, the specific structure of the light-blocking low-level street lamp of the present invention includes a first light-emitting device 10, a second light-emitting device 20, a grid 30, a driver 40 and a housing 50, wherein a first side wall 51 of the housing 50 is provided with a first upper light-blocking plate 11 for facilitating light emission of the first light-emitting device 10, and a second side wall 52 corresponding to the first side wall 51 of the housing 50 is provided with a second upper light-blocking plate 21 for facilitating light emission of the second light-emitting device 20.
The first light emitting device 10 is directly or indirectly fixed on the second side wall 52, the first lower light interception device 12 is arranged below the first light emitting device 10, the second light emitting device 20 is directly or indirectly fixed on the first side wall 51, the heights of the first light emitting device 10 and the second light emitting device 20 are different, and the light emitting area of the first light emitting device 10 is connected with the light emitting area of the second light emitting device 20, so that the omnidirectional illumination below the line of sight of a road driver is realized.
The first light-emitting device 10 has at least one first main optical axis illumination ray 13 with an angle α to the horizontal plane, the second light-emitting device 20 has at least one second main optical axis illumination ray 23 with an angle α to the horizontal plane, the first main optical axis illumination ray 13 is below the lower edge of the first upper light-interception plate 11, and the first main optical axis illumination ray 13 is above the upper edge of the first lower light-interception device 12; the second main optical axis illumination ray 23 is below the lower edge of the second upper cutoff plate 21.
The low-level street lamp adopts the composite light distribution and anti-dazzle structure, the anti-dazzle structure completely shields the sight of a driver, the driver cannot directly irradiate the light emitting surface of the light emitting device, and meanwhile, the driver cannot see any internal reflecting surface. The internal light-emitting device is not limited by the anti-glare angle, and adopts extremely small vertical angle irradiation, the main optical axis is nearly parallel to the road surface, the light is projected to the road surface far as possible, and the distance-to-height ratio is more than 10.
The low-level street lamp adopts a composite light distribution technology, light spots are rectangular, the beam angle in the vertical direction is extremely small, and light passes through an anti-dazzle structure as much as possible and is projected out of a road surface in a long distance. The light efficiency of the multidimensional low-level street lamp is improved. The forward illumination and reverse illumination modes are adopted, a small included angle is formed between the light and the road driving direction, and the high-pitch high-ratio technology is adopted, so that light forms a large-area light spot on the road surface, rectangular light spots in multiple directions are overlapped on the road, and zebra crossings are eliminated.
Further, the light emitting device is fixed in the lampshade structure, or the light emitting device is contacted with the lampshade structure, or the light emitting device is separated from the lampshade structure. The value range of the relative included angle theta between the light-emitting device and the lampshade structure is (0 degree, 90 degrees). 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 and fixedly connected, and the distance between the light-emitting device and the lampshade structure can be larger than zero, smaller than zero or equal to zero.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.
The foregoing is a description of the embodiments of the present invention, and is not to be construed as limiting the invention, since modifications in the detailed description and the application scope will become apparent to those skilled in the art upon consideration of the teaching of the embodiments of the present invention.

Claims (4)

1. A manufacturing method of a light-cut-off type low-level street lamp is characterized by comprising the following steps:
the included angle between the sight of the driver and the horizontal line is ，The value range of (a) is 0 degrees < alpha +.4 degrees, the intersection point of the sight line of the driver and the horizon is taken as the origin, and the vertical line between the sight line of the driver and the horizon is translated to the origin position to be taken as the ordinate; taking a straight line on the horizon and on the same vertical face as the line of sight of the driver and the vertical coordinate line as an abscissa; obtaining the sight line function of the sight line of the driver as；
The particle W slides along the function track of the sight line function to sequentially obtain the pointDotsThe method can obtain:
；
The manufacturing light-cutting type low-level street lamp comprises a light-emitting device and a lamp shade structure, wherein the lamp shade structure is provided with an upper light-cutting device, the lower edge point of the upper light-cutting device is a point P, the point I is positioned at the joint of the light-emitting device and the lamp shade structure, the point K is equal to the abscissa of the point P, namely the coordinate of the point P is ；
Installing the light-intercepting low-level street lamp, and setting the horizontal length of the upper light-intercepting plate as a, wherein a isA has a value of 0.05m1.0 M; and the lower edge point P of the upper light interception device is not higher than the point K, namely:；
The manufacturing method also comprises the following steps:
the particle W slides along the driver's line of sight to obtain a dot Point J is between point I and point K;
The upper edge point of the lower light interception device of the lampshade structure is set as a point Q, and the placement point J is equal to the abscissa of the point Q, namely the point coordinate is ；
Let the horizontal length of the lower light-interception plate be bB has a value of 0.0m0.8 M; and the upper edge point Q of the lower light interception device is not lower than the point J, namely:；
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 ，，
From the following components，Can be obtained=
0；
The method can obtain: h0/d；
Let the included angle between the horizontal line and the line connecting the lower edge point P of the upper light interception device and the upper edge point Q of the lower light interception device be beta, then h0/d0=，; The vertical distance h0 between the lower edge point of the upper light interception device and the upper edge point of the lower light interception device is in a value range of-0.07 m & lt, h0 & lt, 0.07 m; the value range of the horizontal distance d0 between the lower edge point of the upper light interception device and the upper edge point of the lower light interception device is d0.0 m;
the manufacturing method also comprises the process of arranging the light-emitting device:
taking a vertical line between the point K and the horizon as a symmetry axis to obtain a line of sight function symmetry line of a line function where the driver line of sight is located;
Translating the symmetry line of the sight line function along the horizontal direction to intersect at a point P to obtain a main optical axis, wherein the main optical axis intersects with the ground at a point B The included angle between the main optical axis and the horizon is；
Reversely extending the main optical axis to be intersected at a point A at the intersection of the light emitting device and the lampshade structureThe light-emitting device comprises at least one main optical axis emission ray at a point A, and the emission direction of the main optical axis emission ray is completely coincident with the direction of the main optical axis;
The manufacturing method further comprises the step of calculating the height ratio of the emitted light distance at the position where the light emitting device and the main optical axis completely coincide:
The emission distance of the emitted light is the horizontal distance from the point A to the point B, namely 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, i.e. the emission height h=of the emitted light; The ratio d/h=of the distance of the emitted light rays=
Obtainable from 0 DEG < alpha +.4 DEG,。
2. The light-interception type low-level street lamp is characterized by being applied to night roads with long illumination distance and anti-dazzle, is manufactured based on the manufacturing method of the light-interception type low-level street lamp in claim 1 and comprises a lamp shade structure and a light-emitting device for projecting light through the lamp shade structure.
3. The cut-off type low-level street lamp according to claim 2, 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.
4. The low-level street lamp of claim 2, wherein the light emitting device is fixed in the lamp housing structure, or the light emitting device is in contact with the lamp housing structure, or the light emitting device is separated from the lamp housing structure.
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