CN202993056U - Guardrail lamp lens, guardrail lamp and road lighting device composed of guardrail lamp lens and guardrail lamp - Google Patents

Abstract

The utility model discloses a guardrail lamp lens, a guardrail lamp and a road lighting device composed of the guardrail lamp lens and the guardrail lamp. The guardrail lamp lens comprises a refraction lens and a reflection prism located on one side of the refraction lens. The refraction lens and the reflection prism are connected through a shared bottom, and a recessed face used for placing a light source is arranged in the middle of the bottom. The refraction lens collects light emitted from the light source in the direction perpendicular to the ground and distributes the light to the place under the horizontal line, and beam angle of the light emitted from the light source in the horizontal direction is evenly enlarged by the refraction lens. The reflection prism conducts light distribution on the light emitted from the light source and distributes the light to the place under the horizontal line. Light emitted from the light source can be expanded to be a large beam angle in the direction parallel to the road face, and large-range lighting on the road face is obtained. The reflection prism is adopted to conduct light cutting design, and dazzle on the horizontal line can be removed.

Description

Guardrail lamp lens, guardrail lamp and road lighting device formed by guardrail lamps

Technical Field

The utility model relates to a secondary optical lens is used in the illumination, more specifically says, relates to a road lighting device who is used for road lighting to use, suppresses light at the below guardrail lamp lens of water flat line, guardrail lamp and constitution.

Background

The guardrail lamp is a lighting lamp arranged on the railings at two sides of the road. Most of the existing guardrail lamps are used for lighting at night scenes and landscapes in cities, and play a role in decorating and decorating elevated roads or bridges. The guardrail is generally formed by additionally arranging a cylindrical guardrail plastic sleeve on a medium-low power LED lamp strip, can only illuminate and beautify the guardrail, but cannot illuminate roads. The existing guardrail tube device has the defects that the emergent light is scattered, the irradiation distance is short, and if a high-power LED is used for illuminating a road, strong dazzling glare can be generated, but a good effect cannot be achieved.

The patent No. 201110350632.7 discloses a guardrail lamp and guardrail lamp lens, its include a rear end face, one with relative preceding terminal surface of rear end face and being located side between preceding terminal surface and the rear end face has an accepting groove on the rear end face, and the inner wall of this accepting groove does the income plain noodles of guardrail lamp lens is formed with on the preceding terminal surface the first play plain noodles of guardrail lamp lens, side are including the first side that is close to guardrail lamp lens top side and the second side that is close to guardrail lamp lens bottom side, first side is the first reflection of light face of guardrail lamp lens, and the second side includes a second play plain noodles that is close to the rear end face and is located second reflection of light face between second play plain noodles and the preceding terminal surface. The guardrail lamp lens can basically irradiate the road surface and the guardrail with the light emitted by the light source of the guardrail lamp, so that the light emitted by the light source of the guardrail lamp can be effectively utilized. However, it cannot completely suppress the light for illumination below the horizontal line, thereby causing an effect of glare generated by various vehicles or pedestrians walking on the road.

Therefore, in order to use the guardrail lamp device to illuminate the road, the light beams of the guardrail lamp in the direction perpendicular to the road surface need to be collected and suppressed below the horizontal line, and the light distribution needs to be designed to uniformly distribute the light beams to the road surface. But it is very important here: that is, the light of the guardrail light cannot be emitted above the horizontal line because the light emitted above the horizontal line can cause glare to the running automobile.

SUMMERY OF THE UTILITY MODEL

Based on this, the first objective of the present invention is to provide a guardrail lamp lens, which can converge the light emitted from the light source in the direction perpendicular to the road surface and distribute the light to the road surface below the horizontal line; which can uniformly spread light emitted from a light source in a direction parallel to a road surface into a large beam angle, thereby obtaining a wide range of illumination on the road surface.

A second object of the present invention is to provide a guardrail lamp comprising the above guardrail lamp lens.

A third object of the present invention is to provide a road lighting device comprising the above-mentioned guardrail lamp.

In order to achieve the first purpose, the utility model adopts the following technical scheme:

a guardrail lamp lens comprises a refraction lens and a reflection prism positioned on one side of the refraction lens, wherein the refraction lens and the reflection prism are connected through a common bottom, and a concave surface for placing a light source is arranged in the middle of the bottom; the bottom is also provided with a plurality of clamping corners for assembly; the refraction lens is used for converging the light emitted from the light source in the direction vertical to the road surface and distributing the light below a horizontal line, and the refraction lens is used for uniformly expanding the beam angle of the light emitted from the light source in the horizontal direction; the reflecting prism is used for distributing light emitted from the light source and distributing the light below a horizontal line.

Preferably, the refractive lens comprises a concave incident surface positioned on the inner side and a light distribution curved surface positioned on the outer side; the reflecting prism comprises a reflecting surface positioned on the inner side and an emergent surface positioned on the outer side, and the emergent surface is intersected with the light distribution curved surface; the light emitted by the light source is incident to the light distribution curved surface and the reflecting surface respectively after passing through the concave incident surface, the light distribution curved surface is used for distributing the incident light and emitting emergent light below a horizontal line, the reflecting surface is used for reflecting the incident light to the emergent surface, and the emergent surface is used for emitting the light as emergent light below the horizontal line; the reflecting surface is partially or totally reflected.

Preferably, the light distribution curve specifically includes: when light emitted by the light source is incident to the uppermost point P of the light distribution curved surface, the included angle between the incident light and the horizontal line is alpha, the alpha is positioned between 30 degrees and 40 degrees, and the emergent light is parallel to the horizontal line; when light emitted by the light source enters the lowest W point of the light distribution curved surface, the emergent light forms an angle psi max1 with the horizontal line, and psi max1 is between 60 and 90 degrees; when light emitted by the light source enters between the uppermost point P and the lowermost point W of the light distribution curved surface, the angle between the emergent light and the horizontal line is between 0 and psi max 1.

Preferably, when light emitted by the light source enters between the uppermost point P and the lowermost point W of the light distribution curved surface through the concave incident surface, an included angle between the incident light and a horizontal line is θ 1, and an included angle between the emergent light and the horizontal line is θ 2, and the following formula is satisfied:

$\mathrm{\θ}2={\tan }^{-1}\left[\frac{\mathrm{TW}\·\sin \mathrm{\β}}{w-\mathrm{TW}\·\cos \mathrm{\β}}\right]$

wherein, $\sin \mathrm{\&beta;}=\frac{h}{\sqrt{h^2+{\mathrm{<figure-callout\; id="2"\; label="w"\; filenames="HSA00000797980600011.png,HSA00000797980600022.png"\; state="\{\{state\}\}">w</figure-callout>}}^2}}$

$\cos \mathrm{\&beta;}=\frac{w}{\sqrt{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HSA00000797980600011.png,HSA00000797980600022.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+{\mathrm{<figure-callout\; id="2"\; label="w"\; filenames="HSA00000797980600011.png,HSA00000797980600022.png"\; state="\{\{state\}\}">w</figure-callout>}}^2}}$

in the formula: w is the road surface width, h is the mounting height of guardrail lamp, and alpha is when the light that the light source launched incides the top P point of grading curved surface, its incident light and the contained angle of water flat line.

Preferably, the light distribution of the reflecting prism to the light ray is specifically as follows: when light emitted by the light source enters the lowest U point of the reflecting surface, the reflected light passes through the lowest P point of the emergent surface and is refracted by the emergent surface to be emitted as emergent light parallel to the horizontal line direction; when light emitted by the light source is incident to the uppermost Q point of the reflecting surface, the emitted light is emitted in the direction vertical to the horizontal line; when light emitted by the light source enters between the uppermost Q point and the lowermost U point of the reflecting surface, the reflected light is refracted by the emergent surface and then is emitted out in an angle range of rotating downwards by 90 degrees from a horizontal line to a horizontal line.

Preferably, when light emitted from the light source enters between the uppermost point Q and the lowermost point U of the reflection surface through the concave incident surface, an included angle between the incident light and a horizontal line is θ 1, and an included angle between an emergent light refracted by the emergent surface and the horizontal line is θ 2, and the following formula is satisfied:

$\mathrm{\&theta;}2={\tan }^{-1}\left[\frac{\mathrm{TW}\&CenterDot;\sin \mathrm{\&beta;}}{w-\mathrm{TW}\&CenterDot;\cos \mathrm{\&beta;}}\right]$

wherein, $\sin \mathrm{\&beta;}=\frac{h}{\sqrt{h^2+{\mathrm{<figure-callout\; id="2"\; label="w"\; filenames="HSA00000797980600011.png,HSA00000797980600022.png"\; state="\{\{state\}\}">w</figure-callout>}}^2}}$

$\cos \mathrm{\&beta;}=\frac{w}{\sqrt{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HSA00000797980600011.png,HSA00000797980600022.png"\; state="\{\{state\}\}">h</figure-callout>}}^2+{\mathrm{<figure-callout\; id="2"\; label="w"\; filenames="HSA00000797980600011.png,HSA00000797980600022.png"\; state="\{\{state\}\}">w</figure-callout>}}^2}}$

in the formula: w is the road surface width, h is the mounting height of guardrail lamp, and alpha is when the light that the light source launched incides the top P point of grading curved surface, its incident light and the contained angle of water flat line.

Preferably, the refraction lens uniformly expands the beam angle of the light emitted from the light source in the horizontal direction by: when light emitted by the light source is incident on the light distribution curved surface through the concave incident surface, the light distribution curved surface transversely expands the light along the horizontal direction, the expanded emergent light is uniformly distributed in the range with the angle psi max, and the psi max is between 90 and 150 degrees.

Preferably, when the light emitted from the light source is incident on the light distribution curved surface through the concave incident surface in the horizontal direction, the incident angle is δ 1, the emergent angle is δ 2, and the following formula should be satisfied:

preferably, a plurality of round clamping corners for fixing are further arranged on the bottom.

In order to achieve the second purpose, the utility model adopts the following technical scheme:

according to the guardrail lamp consisting of the guardrail lamp lens, the LED light source is arranged in the concave surface in the middle of the bottom.

In order to achieve the third objective, the utility model adopts the following technical scheme:

the utility model provides a road lighting device according to foretell guardrail lamp lens is constituteed, it still includes guardrail pipe, anti-dazzling screen, transparent window, printed circuit board and fin of penetrating, the lamp source is installed in the concave surface of guardrail lamp lens bottom, is equipped with an opening on the guardrail pipe is close to road one side, printed circuit board, fin and guardrail lamp lens are located the opening perpendicularly, and printed circuit board installs on the fin, guardrail lamp lens installs on printed circuit board, anti-dazzling screen installs in the opening of guardrail lamp lens top, transparent window of penetrating is installed in the open-ended outside, and is the same with the shape of guardrail pipe.

Compared with the prior art, the utility model has the advantages of:

1. the light source can converge the light emitted from the light source in the direction vertical to the road surface and distribute the light to the road surface below the horizontal line; which can uniformly spread light emitted from a light source in a direction parallel to a road surface into a large beam angle, thereby obtaining a wide range of illumination on the road surface.

2. Additionally, the utility model discloses reflection prism's structure has still been adopted and has been cut light design to eliminate the glare that the guardrail lamp jetted out to water flat line top.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a three-dimensional external view of the guardrail lamp lens of the invention;

fig. 2 is a top view of the guardrail lamp lens of the present invention shown in fig. 1;

fig. 3 is a side view of the guardrail light lens of the present invention shown in fig. 1;

fig. 4 is a bottom view of the guardrail lamp lens of fig. 1;

FIG. 5 is a cross-sectional view of the guardrail lamp lens of the present invention taken along the A-A direction (perpendicular to the road surface) shown in FIG. 2;

FIG. 6 is a cross-sectional view of the guardrail light lens of the present invention taken along the direction B-B (parallel to the road surface) shown in FIG. 2;

FIG. 7 is a schematic design diagram of the guardrail lamp lens of the present invention along the A-A section;

FIG. 8 is a schematic diagram of the light distribution curved surface 12 of the guardrail lamp lens along the A-A section of the utility model;

fig. 9 is a schematic diagram of the light distribution curved surface 12 of the guardrail lamp lens along the section a-a of the utility model to a single light;

FIG. 10 is a schematic view of an equivalent light distribution triangle of the guardrail lamp lens of the present invention along the A-A section;

FIG. 11 is a schematic diagram of the light distribution of the reflector 21 of the guardrail lamp lens along the A-A section of the utility model;

fig. 12 is a schematic diagram of the light distribution of the guardrail lamp lens of the present invention to a single light ray along the reflecting surface 21 of the section a-a;

FIG. 13 is a schematic design view of the guardrail light lens of the present invention along the B-B section;

FIG. 14 is a schematic diagram of the light distribution of the guardrail lamp lens of the present invention to a single light ray along the B-B section;

FIG. 15 is a schematic view of an equivalent light distribution triangle of the guardrail lamp lens of the present invention along the B-B section;

fig. 16 is a schematic view of the light trace of the guardrail light lens of the invention;

fig. 17 is a light spot shape and an illuminance distribution diagram of the guardrail lamp of the present invention at a distance of 15 meters in front of the lens;

fig. 18 is a light spot shape and an illuminance distribution diagram of the guardrail lamp lens of the present invention on a road surface;

fig. 19 is a light distribution curve diagram of the guardrail lamp lens of the invention;

FIG. 20 is a pseudo-color representation of the lens of the guardrail light of the present invention in a road lighting effect;

fig. 21 is a schematic diagram of a simulation of the road surface illuminance distribution when the guardrail lamp lens of the present invention is used for illuminating a bilateral guardrail lamp;

fig. 22 is a schematic structural view of the road lighting device composed of the guardrail lamp of the present invention.

Description of reference numerals:

1. the LED light source comprises a refraction lens, 2, a reflection prism, 3, a bottom, 4, a circular clamping angle, 5, a light source, 6, a metal guardrail tube, 7, a shading sheet, 8, a transparent emergent window, 9, a printed circuit board, 10, a radiating fin, 11, a concave incident surface, 12, a light distribution curved surface, 15, an LED light source, 21, a reflection surface, 22 an emergent surface and A and a guardrail lamp lens.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

The principle of the utility model lies in: the LED light source can converge light emitted from the LED in the direction vertical to the road surface and distribute the light to the road surface below a horizontal line; which can uniformly spread the light emitted from the LEDs in a direction parallel to the road surface into a large beam angle, thereby obtaining a wide range of illumination on the road surface. In addition, a light-cutting design is carried out by adopting a structure of a reflecting prism, so that glare emitted by the guardrail lamp to the upper part of a horizontal line is eliminated.

Referring to fig. 1-4, the lens of the guardrail lamp of the present invention includes a refractive lens 1 and a reflective prism 2 located at one side of the refractive lens 1, the refractive lens 1 and the reflective prism 2 are connected by a common bottom 3, and a concave surface for placing a light source 5 is disposed in the middle of the bottom 3; the refraction lens 1 converges the light emitted from the light source 5 in a direction perpendicular to the road surface and distributes the light below a horizontal line, which uniformly expands the beam angle of the light emitted from the light source 5 in the horizontal direction; the reflecting prism 2 distributes light emitted from the light source 5 to a horizontal line or below. In addition, there are a plurality of bayonet locks 4 that are used for assembly positioning in the below of bottom 3, the utility model discloses in, bayonet lock 4 is circular bayonet lock, and the quantity of preferred circular bayonet lock 4 is 4. Wherein: the light source 5 may be an LED lamp.

Referring to fig. 5-6, point O is the central point position of the light emitting surface of LED light source 5, and OZ is the optical axis passing through the central point O of the light emitting surface of LED light source 5 and perpendicular to the light emitting surface of LED light source 5. The refractive lens 1 includes an inner concave incident surface 11 and a light distribution curved surface 12, the inner concave incident surface 11 may be a spherical surface or an aspherical surface, and the inner concave incident surface 11 is preferably a spherical surface; the light distribution curved surface 12 is relatively convex in the outline in the cross section A-A (figure 5) and plays a role of converging light rays in the cross section A-A, and the light distribution curved surface 12 is relatively flat at the top of the outline in the cross section B-B (figure 6) and plays a role of diverging light rays in the cross section B-B.

The reflecting prism 2 mainly plays a role of light interception, and eliminates glare emitted by the guardrail lamp to the upper part of a horizontal line; the light distribution curved surface comprises a reflecting surface 21 positioned on the inner side and an emergent surface 22 positioned on the outer side, wherein the emergent surface 22 is intersected with the light distribution curved surface 12; the light emitted by the light source 5 is incident to the light distribution curved surface 12 and the reflection surface 21 respectively after passing through the concave incident surface 11, the light distribution curved surface 12 distributes the incident light to emit emergent light below a horizontal line, the reflection surface 21 reflects the incident light to the emergent surface 22, and the emergent surface 22 emits the light below the horizontal line.

Fig. 7 is a schematic design diagram of the guardrail lamp lens according to the present invention along the a-a section (perpendicular to the road surface). Light rays emitted from a point O at the center of the light emitting surface of the LED light source 5 pass through the concave incident surface 11 and then enter the light distribution curved surface 12 of the refractive lens 1 and the reflection surface 21 of the reflection prism 2, respectively. After the light rays passing through the light distribution curved surface 12 of the refractive lens 1 are distributed by the light distribution curved surface 12, emergent light rays are distributed below a horizontal line parallel to the optical axis OZ; a part of the light rays incident on the reflecting surface 21 of the reflecting prism 2 is reflected by the reflecting surface 21, and the reflected light rays are emitted through the emitting surface 22, and the emitted light rays are also distributed below a horizontal line parallel to the optical axis OZ. The reflected light needs to meet certain light distribution conditions after being output through the emergent surface 22; the reflecting surface 21 may be partially reflecting or totally reflecting, that is, it does not necessarily reach the boundary condition of total reflection, and in order to increase the reflectivity, the reflecting surface 21 may be further coated with a reflecting film.

Fig. 8 is a schematic diagram of the light distribution curved surface of the guardrail lamp lens along the a-a section (perpendicular to the road surface). When a light ray emitted from a point O in the center of the light emitting surface of the LED light source 5 enters the uppermost point P of the contour line of the light distribution curved surface 12, the emergent light ray is parallel to the optical axis OZ (horizontal line); when the light enters the lowest W point of the contour line of the light distribution curved surface 12, the emergent light rays of the light distribution curved surface emit below the optical axis OZ and form a large angle psi max1 with the optical axis OZ, and the psi max1 is between 60 and 90 degrees, wherein the psi max1 is preferably 90 degrees; when the light enters other positions on the contour line of the light distribution curved surface 12, the angle between the emergent ray and the optical axis OZ (horizontal line) is between 0 and ψ max 1.

Fig. 9 is a schematic diagram of the light distribution curved surface 12 of the guardrail lamp lens along the a-a section to a single light ray according to the present invention. A light ray OS emitted from a point O at the center of the light emitting surface of the LED light source 5 passes through the concave incident surface 11 and then enters the light distribution curved surface 12 at a position S, the point S is located between the uppermost point P and the lowermost point W of the light distribution curved surface 12, and an included angle between the incident light ray OS and an optical axis OZ (horizontal line) is θ 1. The light rays OS are converged by the light distribution curved surface 12 and then emitted as emergent light rays ST, and an angle between the light rays ST and an optical axis OZ (horizontal line) is θ 2. Assuming that the angle is negative when the light beam is emitted to the upper part of the optical axis OZ (horizontal line), and the angle is positive when the light beam is emitted to the lower part of the optical axis OZ (horizontal line); when the light enters the uppermost point P of the light distribution curved surface 12, the included angle between the marginal ray OP and the optical axis OZ (horizontal line) is-alpha and-alpha is between-30 degrees and-40 degrees. The relationship between the incident angle θ 1 and the exit angle θ 2 can be calculated from the equivalent light distribution triangle shown in fig. 10. The equivalent light distribution triangle is converted according to the following mode: the emergent point S on the light distribution curved surface 12 is moved to the position of an O' point of the right triangle, the width w of a road surface is taken as the transverse edge of the right triangle, the height h of the guardrail lamp is taken as the left vertical edge of the right triangle, the hypotenuse HW is the irradiation range of all emergent rays of the light distribution curved surface 12 on the A-A section and can be equally divided into n equal parts, wherein the ith emergent ray ST irradiates the position of the hypotenuse T point of the triangle. Meanwhile, the light rays incident from the LED light source 5 are also divided into n equal parts from the uppermost edge P point to the lowermost edge W point of the light distribution curved surface 12 according to equal angles, and the n equal parts divided from the same irradiation range are in one-to-one correspondence.

At this time, according to the right triangle law, the height h and road surface width w installed by the guardrail lamp can be obtained:

$\sin \mathrm{\&beta;}=\frac{\mathrm{<figure-callout\; id="2"\; label="h\; h"\; filenames="HSA00000797980600011.png,HSA00000797980600022.png"\; state="\{\{state\}\}">h</figure-callout>}}{\sqrt{h^{}}}---\left(1a\right)$

$\cos \mathrm{\&beta;}=\frac{\mathrm{<figure-callout\; id="2"\; label="w\; h"\; filenames="HSA00000797980600011.png,HSA00000797980600022.png"\; state="\{\{state\}\}">w</figure-callout>}}{\sqrt{h^{}}}---\left(1b\right)$

because the i-th emergent ray of the incident ray OS corresponding to O' T has an angle θ 1 with the optical axis OZ, and corresponds to the position of the T point in the irradiation target HW, the following relationship is provided:

from the sine theorem of triangle Δ O' TW, we have:

$\frac{\mathrm{TW}}{\sin \mathrm{\&theta;}2}=\frac{w}{\sin (n-\mathrm{\&theta;}2-\mathrm{\&beta;})}$

$\frac{\mathrm{TW}}{\sin \mathrm{\&theta;}2}=\frac{w}{\sin (\mathrm{\&theta;}2+\mathrm{\&beta;})}=\frac{w}{\sin \mathrm{\&theta;}2\cos \mathrm{\&beta;}+\cos \mathrm{\&theta;}2\sin \mathrm{\&beta;}}$

w·sinθ2＝TW·sinθ2cosβ+TW·cosθ2sinβ

sinθ2[w-TW·cosβ]＝TW·cosθ2sinβ

therefore, the light distribution condition between the exit angle θ 2 and the incident angle θ 1 is derived as follows:

$\mathrm{\&theta;}2={\tan }^{-1}\left[\frac{\mathrm{TW}\&CenterDot;\sin \mathrm{\&beta;}}{w-\mathrm{TW}\&CenterDot;\cos \mathrm{\&beta;}}\right]---\left(3\right)$

by combining the above formulas (1) to (3), the coordinate value of each point on the contour line of the light distribution curved surface 12 on the a-a section (perpendicular to the road surface direction) can be calculated point by using a numerical iteration method of a computer, so that the contour line shape of the light distribution curved surface 12 on the a-a section can be obtained.

Fig. 11 is a schematic diagram of the light distribution of the lens of the guardrail lamp along the reflecting surface 21 of the a-a section according to the present invention. For the reflector prism 2 on the lens side of the guardrail light. After passing through the incident surface 11, a part of light emitted from a point O at the center of the light emitting surface of the LED light source 5 and having an angle of-90 ° - α with respect to the optical axis OZ (horizontal line) is incident on the reflecting surface 21, and after being reflected by the reflecting surface 21, the reflected light is refracted by the exit surface 22 located at the outer side and then output. The edge light ray incident to the lowest U point position of the reflecting surface 21 passes through the lowest P point of the emergent surface 22, is refracted by the emergent surface 22 and then is horizontally emitted as the emergent light ray parallel to the optical axis OZ (horizontal line); the edge light incident on the uppermost Q point of the reflecting surface 21 is emitted as an outgoing light in a direction perpendicular to the optical axis OZ (horizontal line) and downward. The light rays incident on the other positions between the uppermost Q point and the lowermost U point of the reflecting surface 21 are output and distributed within a range between the optical axis OZ (horizontal line) and a 90 ° downward rotation from the horizontal line. In this way, since all the output light is distributed below the optical axis OZ (horizontal line), the entire lens-side reflecting prism 2 functions as a light cutoff which can eliminate glare on a running vehicle caused by light directed above the horizontal line.

Fig. 12 is a schematic diagram of the light distribution of the guardrail lamp lens of the present invention along the reflection surface 21 of the a-a section to a single light. A lens-side reflecting prism 2. Assuming that the incident light is OK and the included angle between the incident light and the optical axis OZ (horizontal line) is θ 1, the light enters the reflective surface 21 through the concave incident surface 11, the reflected light KL is refracted by the exit surface 22 and then output, the output light is LM, and assuming that the included angle between the output light LM and the optical axis OZ (horizontal line) is θ 2, the relationship between the exit angle θ 2 and the incident angle θ 1 can also be calculated according to the equivalent light distribution triangle shown in fig. 10. The equivalent light distribution triangle is converted according to the following mode: the exit point L on the exit surface 22 is moved to the position of the O' point of the right triangle, the road surface width w is used as the transverse side of the right triangle, the height h of the installation of the guardrail lamp lens is used as the left vertical side of the right triangle, the hypotenuse HW is the irradiation range of all the output light reflected by the reflecting surface 21, and the output light is equally divided into n equal parts, wherein the ith exit light LM corresponds to the position of the T point on the hypotenuse HW of the equivalent triangle. Meanwhile, the light incident on the reflecting surface 21 is divided into n equal parts from the point u to the point Q at the edge according to equal angles, and the n equal parts are in one-to-one correspondence with the n equal parts of the irradiation target.

Since the incident ray OK corresponding to O' T is the ith incident ray, the angle between the ith incident ray and the optical axis OZ (horizontal line) is θ 1, θ 1 is between-90 ° and- α, and the position of T point is the ith corresponding position point on the irradiation target HW, the formula (2) may be changed into the following form according to the corresponding relationship:

by combining the above equations (4) and (3), the coordinate value of each point on the contour line of the a-a section (perpendicular to the road surface) of the reflecting surface 21 can be calculated point by using a numerical iteration method of the computer, so as to obtain the shape of the reflecting surface 21 on the a-a section.

Fig. 13 is a schematic diagram of the design of the guardrail lamp lens along the B-B section (parallel to the road surface). Light rays emitted from a point O in the center of the light emitting surface of the LED light source 5 pass through the concave incident surface 11 and then enter the light distribution curved surface 12, the light distribution curved surface 12 transversely expands the light rays along the B-B section direction, and the expanded light rays are uniformly distributed in a range of an angle psi max, wherein the psi max is a maximum beam angle and can be in a range of 90-150 degrees.

Fig. 14 is a schematic diagram of the light distribution of the guardrail lamp lens along the B-B section to a single light ray according to the present invention. Assuming that an angle between a light ray OA emitted from a point O at the center of a light emitting surface of the LED light source 5 and an optical axis OZ (horizontal line) is δ 1, the light ray OA enters the light distribution curved surface 12 at the point a, is distributed by the light distribution curved surface 12, and then is emitted as an emergent light ray AB, and an angle between the emergent light ray AB and the optical axis OZ is δ 2. The relationship between the exit angle δ 2 and the incident angle δ 1 can be calculated from the equivalent light distribution triangle shown in fig. 15. The equivalent light distribution triangle is converted according to the following mode: moving the emergent point A to a point O ' of the right triangle, setting the irradiation distance H as the left vertical side of the right triangle, setting the irradiated road pavement length L as the transverse side of the right triangle, and setting O ' E as the edge emergent ray of the curved surface 12, namely ═ ZO ' E ═ Ψ max/2. And dividing the irradiation range ZE into m equal parts, and simultaneously dividing the included angle between the incident light and the optical axis OZ from 0-90 degrees into m equal parts, and corresponding the sequence of the incident angle and the irradiation position one by one, assuming that OA is the jth incident light, the incident angle is δ 1, the exit angle is δ 2, and the position of the exit light on the irradiation target is the point B on the line segment ZE, then according to the trigonometric function relationship in fig. 15, it can be obtained:

thus, the following results are obtained: the light distribution condition between the exit angle δ 2 and the incident angle δ 1 meets:

similarly, according to the light distribution condition of the formula (5), the coordinate value of each point on the contour line of the light distribution curved surface 12 on the B-B section (parallel to the road surface direction) is calculated point by using a numerical iteration method of the computer, so that the shape of the light distribution curved surface 12 on the B-B section is obtained.

According to the light distribution conditions on the A-A section and the B-B section obtained above, the contour lines of the refraction lens 1 and the reflection prism 2 of the guardrail lamp lens on the A-A section and the B-B section are respectively obtained by using a mathematical iteration method, so that a three-dimensional solid model of the lens can be established by using curved surface generation software.

Fig. 16 is a schematic view of the light trace of the guardrail lamp lens according to the present invention. Will the utility model discloses a three-dimensional solid model of guardrail lamp lens inputs and carries out light tracking and luminosity analysis in the luminosity analysis software, and the LED light source that the hypothesis was used is CREE's XPE, and single LED's luminous flux is 90 lumens. Fig. 16 shows the light tracing of the lens, and it is obvious that most of the emergent light is distributed below the optical axis OZ (horizontal line) due to the light interception function of the lens reflection prism 2 and the large-angle light distribution function of the lens refraction lens 1, but since the LED light source 5 is an extended light source, it is not a point light source, and a small part of the emergent light is emitted above the horizontal line.

Referring to fig. 17, the light spot shape and the illuminance distribution diagram of the guardrail lamp lens at a distance of 15 meters ahead are shown. The cross hair is the level line and the vertical line in lens dead ahead, can see that a part in the facula is located the top of cross hair line, to this kind of condition, can be in the installation, through adjusting the angle of pitch of guardrail lamp lamps and lanterns a little, distribute the facula on the road surface completely.

Referring to fig. 18, the light spot shape and the illuminance distribution diagram of the lens of the guardrail lamp on the road surface below the distance of 1.2 meters from the lens are shown. The width of the road surface in the figure is 14.2 m, and it can be seen that the range of the lens irradiation exceeds the middle line of the road surface (the horizontal line in the figure, Y is 0) of 7.1 m width.

Referring to fig. 19, it is a light distribution curve diagram of the guardrail lamp lens of the present invention. Wherein: the curve of the narrow beam angle and the 0-degree azimuth angle of the strongest light intensity position deviating from the polar coordinate 0 line by about 5 degrees is a light intensity distribution curve of the lens in the direction vertical to the road surface; and the other curve of the 90-degree azimuth angle with a wide beam angle and symmetrical distribution is a light intensity distribution curve of the lens in the direction parallel to the road surface, the light intensity distribution curve is in batwing distribution, and the beam angle width at the position of half of the peak light intensity is about 100 degrees. Adopt 10 Cree XPE's of every luminous flux for 90 lumens LED light source to join in marriage the utility model relates to a 1 meter long guardrail lamp is constituteed to secondary optical lens to carry out the simulation of road lighting design with the data of test.

Referring to fig. 21, it is a schematic diagram of the simulation of the road surface illuminance distribution when the guardrail lamp lens of the utility model illuminates the guardrail lamps on both sides. Assuming that the lamps are symmetrically arranged on two sides of the road, the road is 4 lanes, the actual measurement width of each lane is 3.55 meters (namely the total width of the 4 lanes is 14.2 meters), the installation height of the guardrail lamp lens is 1.2 meters, the lamps are not installed obliquely, the distance between two adjacent guardrail lamps is 3 meters, the lighting effect on the road surface is shown in fig. 20, the illumination distribution of the road surface and the data of the test grid point are shown in fig. 21, it can be seen that the average illumination of the road surface is 21.56Lux, the illumination uniformity is very good, the uniformity is 79%, and the requirements of the national urban road lighting design standard are met.

The utility model also provides a guardrail lamp according to foretell guardrail lamp lens constitution, it is in installation LED light source 15 in the concave surface of the middle part of bottom 3.

Referring to fig. 22, the present invention further provides a road lighting device composed of the above-mentioned guardrail lamp, further comprising a guardrail tube 6, a light-shielding sheet 7, a transparent emission window 8, a printed circuit board 9(PCB board) and a heat sink 10, wherein the LED light source 15 is installed in the concave surface at the bottom of the guardrail lamp lens a, an opening is provided at one side of the guardrail tube 6 near the road, the printed circuit board 9, the heat sink 10 and the guardrail lamp lens are vertically located in the opening, the printed circuit board 9 is installed on the heat sink 10, the guardrail lamp lens is installed on the printed circuit board 9, the light-shielding sheet 7 is installed in the opening above the guardrail lamp lens, the transparent emission window 8 is installed outside the opening and has the same shape as the guardrail tube 6; the guardrail tube 6 is made of metal; and the guardrail lamp lens can adjust the pitch angle.

Wherein: the light shielding sheet 7 above the guardrail lamp lens plays a role in secondary light interception, eliminates stray light above a horizontal line caused by surface defects of the guardrail lamp lens, and ensures 100% glare elimination. In addition, when the installation height of the guardrail lamp lens is different from the width of the road surface, the pitching angle of the guardrail lamp can be adjusted by rotating the guardrail tube, and light spots are uniformly covered on the road surface.

Through the utility model discloses an implement, it has following advantage: the light source can converge the light emitted from the light source in the direction vertical to the road surface and distribute the light to the road surface below the horizontal line; the light source can uniformly spread the light emitted from the light source into a large beam angle in the direction parallel to the road surface, so that the large-range illumination on the road surface can be obtained; additionally, the utility model discloses reflection prism's structure has still been adopted and has been cut light design to eliminate the glare that the guardrail lamp jetted out to water flat line top.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, various changes and modifications can be made by the owner within the scope of the appended claims, and the protection scope of the present invention should be within the scope of the claims.

Claims (10)

1. The utility model provides a guardrail lamp lens which characterized in that: the LED lamp comprises a refraction lens (1) and a reflection prism (2) positioned on one side of the refraction lens (1), wherein the refraction lens (1) and the reflection prism (2) are connected through a common bottom (3), and a concave surface for placing a light source (5) is arranged in the middle of the bottom (3); a plurality of clamping corners (4) for assembly are further arranged on the bottom (3); the refraction lens (1) is used for converging the light emitted from the light source (5) in the direction vertical to the road surface and distributing the light below the horizontal line, and the refraction lens (1) is used for uniformly enlarging the beam angle of the light emitted from the light source (5) in the horizontal direction; the reflecting prism (2) is used for distributing light emitted from the light source (5) and distributing the light below a horizontal line.

2. The guardrail lamp lens according to claim 1, wherein the refractive lens (1) comprises a concave incident surface (11) at the inner side and a light distribution curved surface (12) at the outer side; the reflection prism (2) comprises a reflection surface (21) positioned on the inner side and an emergent surface (22) positioned on the outer side, and the emergent surface (22) is intersected with the light distribution curved surface (12); the light emitted by the light source (5) passes through the concave incident surface (11) and then respectively enters the light distribution curved surface (12) and the reflecting surface (21), the light distribution curved surface (12) is used for distributing the incident light and emitting emergent light below a horizontal line, the reflecting surface (21) is used for reflecting the incident light to the emergent surface (22), and the emergent surface (22) is used for emitting the light below the horizontal line; the reflecting surface (21) is partially or totally reflecting.

3. The guardrail lamp lens as claimed in claim 2, wherein the light distribution curved surface (12) is used for distributing light: when light emitted by the light source (5) is incident to the uppermost point P of the light distribution curved surface (12), the included angle between the incident light and the horizontal line is alpha, the alpha is positioned between 30 degrees and 40 degrees, and the emergent light is parallel to the horizontal line; when light emitted by the light source (5) is incident on the lowest W point of the light distribution curved surface (12), the emergent light forms an angle psi max1 with the horizontal line, and psi max1 is between 60 and 90 degrees; when light emitted by the light source (5) enters between the uppermost point P and the lowermost point W of the light distribution curved surface (12), the angle between the emergent light and the horizontal line is between 0 and psi max 1.

4. The guardrail lamp lens of claim 3, wherein when the light emitted from the light source (5) is incident between the uppermost point P and the lowermost point W of the light distribution curved surface (12) through the concave incident surface (11), the included angle between the incident light and the horizontal line is θ 1, the included angle between the emergent light and the horizontal line is θ 2, and the following formula is satisfied:

$\mathrm{\&theta;}2={\tan }^{-1}\left[\frac{\mathrm{TW}\&CenterDot;\sin \mathrm{\&beta;}}{w-\mathrm{TW}\&CenterDot;\cos \mathrm{\&beta;}}\right]$

wherein, $\sin \mathrm{\&beta;}=\frac{h}{\sqrt{h^2+w^2}}$

$\cos \mathrm{\&beta;}=\frac{w}{\sqrt{h^2+w^2}}$

in the formula: w is the road surface width, h is the mounting height of guardrail lamp, and alpha is when the light that the light source launched incides the top P point of grading curved surface, its incident light and the contained angle of water flat line.

5. The guardrail lamp lens of claim 2, wherein the reflecting prism (2) distributes light to the light, in particular: when light emitted by the light source (5) enters the lowest U point of the reflecting surface (21), the reflected light passes through the lowest P point of the emergent surface (22) and is refracted by the emergent surface (22) to be emitted as emergent light parallel to the horizontal line direction; when light emitted by the light source (5) is incident to the uppermost Q point of the reflecting surface (21), the emitted light is emitted in an emergent light perpendicular to the horizontal line direction; when light emitted by the light source (5) enters between the uppermost Q point and the lowermost U point of the reflecting surface (21), the reflected light is refracted by the emergent surface (22) and then is emitted out in an angle range from horizontal line to horizontal line which is rotated downwards by 90 degrees.

6. The guardrail lamp lens of claim 5, wherein when the light emitted from the light source (5) is incident between the uppermost Q and the lowermost U point of the reflecting surface (21) through the concave incident surface (11), the angle between the incident light and the horizontal line is θ 1, the angle between the emergent light refracted by the emergent surface (22) and the horizontal line is θ 2, and the following formula is satisfied:

$\mathrm{\&theta;}2={\tan }^{-1}\left[\frac{\mathrm{TW}\&CenterDot;\sin \mathrm{\&beta;}}{w-\mathrm{TW}\&CenterDot;\cos \mathrm{\&beta;}}\right]$

wherein, $\sin \mathrm{\&beta;}=\frac{h}{\sqrt{h^2+w^2}}$

$\cos \mathrm{\&beta;}=\frac{w}{\sqrt{h^2+w^2}}$

in the formula: w is the road surface width, h is the mounting height of guardrail lamp, and alpha is when the light that the light source launched incides the top P point of grading curved surface, its incident light and the contained angle of water flat line.

7. The hurdle lamp lens according to claim 1 or 2, wherein the refractive lens (1) uniformly expands the beam angle of the light emitted from the light source in the horizontal direction by: when light emitted by the light source (5) is incident on the light distribution curved surface (12) through the concave incident surface (11), the light distribution curved surface (12) transversely expands the light along the horizontal direction, the expanded emergent light is uniformly distributed in the range with the angle psi max, and the psi max is between 90 and 150 degrees.

8. The guardrail lamp lens of claim 7, wherein when the light emitted from the light source (5) is incident on the light distribution curved surface (12) through the concave incident surface (11) in the horizontal direction, the incident angle is δ 1, the emergent angle is δ 2, and the following formula is satisfied:

9. a guardrail lamp lens composed of guardrail lamp lens according to claim 1, characterized in that an LED light source (15) is installed in the concave surface of the middle part of the bottom part (3).

10. The road lighting device of claim 9, further comprising a guardrail tube (6), a light shielding plate (7), a transparent emission window (8), a printed circuit board (9) and a heat dissipating plate (10), wherein an opening is formed on one side of the guardrail tube (6) close to the road, the printed circuit board (9), the heat dissipating plate (10) and the guardrail lamp lens are vertically arranged in the opening, the printed circuit board (9) is mounted on the heat dissipating plate (10), the guardrail lamp lens is mounted on the printed circuit board (9), the light shielding plate (7) is mounted in the opening above the guardrail lamp lens, and the transparent emission window (8) is mounted outside the opening and has the same shape as the guardrail tube (6).

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