CN111021277B

CN111021277B - Energy-saving reflector for traffic safety indication

Info

Publication number: CN111021277B
Application number: CN201911375607.7A
Authority: CN
Inventors: 王育华; 濑户孝俊; 吴金花; 刘文晶
Original assignee: Lanzhou University
Current assignee: Lanzhou University
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2022-05-17
Anticipated expiration: 2039-12-27
Also published as: CN111021277A

Abstract

The invention discloses an energy-saving reflector for traffic safety indication, which comprises a first parabolic hole and a second parabolic hole which are arranged side by side, wherein the inner wall of the first parabolic hole and the inner wall of the second parabolic hole are both mirror surfaces; the first parabolic hole is internally sealed with first fluorescent powder, the second parabolic hole is internally sealed with second fluorescent powder, and the first fluorescent powder and the second fluorescent powder adopt fluorescent powder capable of emitting light with different colors. The energy-saving reflector can converge light rays emitted by a vehicle lamp on high-brightness fluorescent powder to excite the fluorescent powder to emit light, and a driver obtains a careful or dangerous signal after seeing the energy-saving reflector and reflecting the light, so that the driver can be cautiously driven to prevent traffic accidents. The energy-saving reflector can be used as a novel safety indication signal display, does not need to be electrified, and has the advantages of energy conservation and environmental protection.

Description

Energy-saving reflector for traffic safety indication

Technical Field

The invention belongs to the field of fluorescent material traffic safety indication application, and relates to commercial yellow fluorescent powder (YAG: Ce) capable of being used in the field of indication lighting³⁺) And red phosphor (CaAlSiN)₃:Eu²⁺) And a reflector therefor.

Background

The fluorescent powder used as the luminescence conversion material has the advantages of energy conservation, environmental protection, small volume, stable luminescence performance and the like, and is the most promising next generation solid luminescence light source. Commercial yellow phosphor YAG Ce³⁺And red phosphor CaAlSiN₃:Eu²⁺The visible light reflector can be excited by natural light, has extremely high luminous efficiency, excellent color rendering index and good stability, and can be designed to be applied to traffic safety indication. At present, road traffic safety indication measures are not complete, a large number of traffic safety accidents still occur every day, particularly, traffic accidents easily occur at the turning of a road at night, and if a set of safety indication signal display can be installed at the turning, the traffic accidents can be greatly reduced. It is therefore of great interest to find an efficient and energy-saving safety indicator signal display.

Disclosure of Invention

The invention aims to provide an energy-saving reflector for traffic safety indication, which can emit high-brightness red light and yellow light after being irradiated by a vehicle lamp.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: an energy-saving reflector for traffic safety indication comprises a first parabolic hole and a second parabolic hole which are arranged side by side, wherein the inner wall of the first parabolic hole and the inner wall of the second parabolic hole are both mirror surfaces; the first parabolic hole is internally sealed with first fluorescent powder, the second parabolic hole is internally sealed with second fluorescent powder, and the first fluorescent powder and the second fluorescent powder adopt fluorescent powder capable of emitting light with different colors.

The energy-saving reflector is composed of two parabolic holes arranged side by side, high-brightness fluorescent powder is packaged in each parabolic hole, and the colors of light emitted by the high-brightness fluorescent powder packaged in the two parabolic holes are different. Along with the change of the distance between the vehicle and the energy-saving reflector, light emitted by the vehicle lamp enters the parabolic hole, is converged on the high-brightness fluorescent powder through the inner wall of the parabolic hole, excites the fluorescent powder to emit light, and a driver obtains a careful or dangerous signal after seeing yellow light or red light reflected by the energy-saving reflector, so that the driver can be cautiously driven to prevent traffic accidents. The energy-saving reflector can be used as a novel safety indication signal display, does not need to be electrified, and has the advantages of energy conservation and environmental protection.

Drawings

Fig. 1 is a top view of the energy-saving reflector of the present invention.

Fig. 2 is a schematic diagram of the light collection of the energy-saving reflector of the present invention.

Fig. 3 is a schematic view of the energy-saving reflector of the present invention applied to a road corner.

Fig. 4 is a schematic view of the application of the energy-saving reflector of the present invention to a bicycle pedal.

Fig. 5 is a reflection diagram of the energy-saving reflector of the present invention when the relative angle between the energy-saving reflector and the light source is different.

Fig. 6 is a graph of the intensity of light reflected by the energy-saving reflector of the present invention as the angle changes.

Fig. 7 is a graph showing the change in color coordinates of light reflected by the energy-saving reflector of the present invention with a change in angle.

In the figure: 1. the fluorescent powder comprises a first parabolic hole, a second parabolic hole, a first fluorescent powder, a second fluorescent powder and a vehicle, wherein the first parabolic hole is 2, the second parabolic hole is 3, the first fluorescent powder is 4, and the second fluorescent powder is 5.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments.

As shown in fig. 1, the energy-saving reflector of the invention comprises a first parabolic hole 1 and a second parabolic hole 2 which are arranged side by side, wherein the cross section of the first parabolic hole 1 and the cross section of the second parabolic hole 2 are both parabolic, and the inner walls of the first parabolic hole 1 and the second parabolic hole 2 are both mirror surfaces; the bottom in the first parabolic hole 1 is packaged with a first fluorescent powder 3, and the bottom in the second parabolic hole 2 is packaged with a second fluorescent powder 4.

The first phosphor 3 is a yellow phosphor (YAG: Ce)³⁺) Or red phosphor (CaAlSiN)₃:Eu²⁺) (ii) a The second phosphor 4 is red phosphor (CaAlSiN)₃:Eu²⁺) Or yellow phosphor (YAG: Ce)³⁺). When in use, the first fluorescent powder 3 and the second fluorescent powder 4 adopt fluorescent powder which can emit light with different colors after illumination.

The principle of the energy-saving reflector of the invention is as follows: commercial fluorescent powder capable of emitting light of different colors is packaged into different parabolic holes, the inner walls of the parabolic holes are smooth mirror surfaces, and when external light irradiates the parabolic holes, the incident light can be converged at the top points of the parabolas to enhance reflection, as shown in fig. 2. In fig. 2, white light (an arrow points to the inside of the parabolic hole) emitted by an external light source is emitted into the parabolic hole, and is focused on fluorescent powder packaged at the bottom of the parabolic hole through a mirror surface on the inner wall of the parabolic hole, and the fluorescent powder in the parabolic hole (red fluorescent powder packaged in one parabolic hole and yellow fluorescent powder packaged in the other parabolic hole) emits light with corresponding color after being excited, and then is emitted out of the parabolic hole after being reflected by the mirror surface.

The use of the energy-saving reflector of the invention:

the economizer reflector is installed at a road curve as shown in fig. 3. At the moment, the novel traffic safety indicator lamp is used as a novel traffic safety indicator lamp. When the vehicle 5 is far from a curve, the driver of the vehicle sees a yellow light reflected by the reflector (fig. 3 (a)) indicating that there is a curve ahead and it is necessary to pay attention to the deceleration and the slow-down, and a red light (fig. 3 (b)) as a danger signal to indicate the driver of the vehicle as a danger. The energy-saving reflector is low in cost, does not need to be electrified, and is very suitable for being installed at the turning positions of the highway and the rural road.

In addition to the energy-saving reflector of the present invention being installed in a road turn, the energy-saving reflector of the present invention can also be installed on the pedals of a bicycle, as shown in fig. 4. At the moment, the energy-saving reflector is used as a novel safety indicator lamp. When the driver only sees the red light (fig. 4 a), it shows that the bicycle in front is not going forward or is decelerating, i.e. the driver is reminded to pay attention to deceleration or avoidance. While the bicycle in front of the vehicle keeps going forward, the driver of the vehicle behind sees red and yellow light (fig. 4b and 4 c) alternating in magnitude with the changing pedals as the pedals of the bicycle are rotated. Because the bicycle is not provided with the lighting equipment, the bicycle is not easy to see under the condition of dim light at night, and traffic accidents are easy to happen.

The energy-saving reflector is arranged at a required place, so that the color of the reflected light of the reflector seen by an observer at different distances can be changed. As the distance between the vehicle and the economizer reflector changes, the relative angle between the two changes, and as the angle changes, the intensity and color of the reflector reflected light seen by the driver of the vehicle also changes, as shown in fig. 5, when the angle between the two is 0 ° (fig. 5 a), the reflected light is observed to be strongest, and as the angle increases, the reflected light is weaker. FIG. 5b is a graph showing the intensity of light reflected by the economizer reflector at a relative angle of 30 between the vehicle and the economizer reflector; fig. 5c is a graph showing the intensity of light reflected by the economizer reflector at a relative angle of 60 between the vehicle and the economizer reflector. As can be seen from fig. 5, the larger the relative angle between the vehicle and the economizer reflector, the weaker the reflected light.

The natural light source and the detector are fixedly arranged side by side, the energy-saving reflector is arranged, the distance between the energy-saving reflector and the natural light source and the distance between the energy-saving reflector and the detector are both 3 meters, a relation graph of the intensity of reflected light changing along with the rotation angle is researched by rotating the energy-saving emitter, as shown in figure 6, the intensity of the reflected light is reduced along with the increase of the rotation angle of the energy-saving emitter, and when the rotation angle of the energy-saving emitter is larger than 30 degrees, the intensity of red light and yellow light are close and exceed the distinguishing range of human eyes. As shown in fig. 7, it can be seen from fig. 7 that as the angle increases, the color coordinate of the reflected light gradually decreases, because the red light and the yellow light reflected by the reflector gradually decrease, and the edge portion of the reflector reflects the natural light source, thereby causing the color coordinate of the detected reflected light to change.

Claims

1. An energy-saving reflector for traffic safety indication is characterized by comprising a first parabolic hole (1) and a second parabolic hole (2) which are arranged side by side, wherein the inner wall of the first parabolic hole (1) and the inner wall of the second parabolic hole (2) are mirror surfaces; a first fluorescent powder (3) is packaged in the first parabolic hole (1), a second fluorescent powder (4) is packaged in the second parabolic hole (2), and the first fluorescent powder (3) and the second fluorescent powder (4) are fluorescent powders capable of emitting light of different colors;

when the vehicle (5) is far away from the curve, the driver of the vehicle sees the yellow light reflected by the reflector, which indicates that there is a curve ahead and needs to pay attention to slow down, and when the vehicle (5) approaches the curve, the driver sees the red light as a danger signal to indicate that the vehicle is dangerous.

2. The energy-saving reflector for traffic safety indication as claimed in claim 1, characterized in that the first phosphor (3) and the second phosphor (4) are high-brightness phosphors.