CN115325512A

CN115325512A - Light strip reflecting device capable of assisting in detecting vehicles

Info

Publication number: CN115325512A
Application number: CN202211113040.8A
Authority: CN
Inventors: 曾启林; 梅嘉宜; 熊显名; 张文涛; 徐宋通; 杜浩; 徐瑞书
Original assignee: Guilin University of Electronic Technology
Current assignee: Guilin University of Electronic Technology
Priority date: 2022-09-13
Filing date: 2022-09-13
Publication date: 2022-11-11

Abstract

The invention provides a light strip reflecting device capable of assisting in detecting vehicles, which can form a rectangular light strip with evenly distributed light intensity by utilizing a curved surface reflector formed by five-segment arcs in the device and reflecting light rays by other structures, thereby achieving the purpose of assisting in detecting vehicles. The method is characterized in that: the LED light source 1 emits light source which irradiates on a special reflector 2 which is at a certain distance from the LED light source 1; the light source is reflected by five sections of curved surface reflecting surfaces 3 with different curvatures in the special reflector 2 and the plane reflectors 4 and 5 at two sides of the curved surface reflecting surfaces 3 to form a rectangular light bar 6 right above the light bar reflecting device. The invention achieves the purpose of auxiliary detection of vehicles by forming larger rectangular light bars with evenly distributed light intensity after the light source is reflected by the small-size device.

Description

Light strip reflecting device capable of assisting in detecting vehicles

(I) technical field

The invention belongs to the field of measurement of optical instruments, and relates to a device for assisting in detecting vehicles by utilizing a rectangular light bar with evenly distributed light intensity, which is formed by a designed light bar reflecting device.

(II) background of the invention

In recent years, with the continuous development and progress of the transportation industry in China, the security inspection of transportation is continuously improved, and therefore, related detection personnel propose different ideas on how to more conveniently and efficiently detect the security of transportation.

Among them, it has been a difficult problem to detect some hidden areas of the vehicle or areas that are inconvenient to be detected manually. After the reflector is used for reflecting the light source, the reflected light illuminates or scans the hidden area of the vehicle through the swinging of the reflector, and the like, so that the auxiliary detection effect on the vehicle is realized. The patents disclosed in the chinese patent application nos. CN201711298720.0 and 202020244541.X are all related to this.

The device for scanning a light beam using a mirror is mainly used for laser cleaning only as a cleaning or auxiliary device, and has not been used for safety inspection of vehicles, and another type of device using a mirror structure, such as the device disclosed in application No. 202110795572.3, is used only as a vehicle component. Nor have they been applied to detecting the safety aspects of a vehicle.

On the other hand, to current device that detects vehicle security, most detection device all sizes are great, not only inconvenient carry the detection, also hardly accomplish accurate detection when needing to detect some less regions.

Therefore, the prior art is still to be improved for devices that are currently less applicable to small devices and devices that use a reflective light source of a mirror for aiding in the inspection of vehicles.

Disclosure of the invention

The invention aims to provide a light bar reflecting device capable of assisting in detecting vehicles, which can form a rectangular light bar with evenly distributed light intensity to realize auxiliary detection of the vehicles.

The technical scheme of the invention is as follows:

a light bar reflecting device capable of assisting in detecting vehicles. The method is characterized in that: the small-size light strip reflecting device emits light from an LED light source 1, and the light irradiates a special reflector 2 which is at a certain distance from the LED light source 1; the light source forms a rectangular light bar 6 with evenly distributed light intensity right above the light bar reflecting device after being reflected by five sections of curved surface reflecting surfaces 3 with different curvatures in the special reflecting mirror 2 and the

plane reflecting mirrors

4 and 5 at two sides of the curved surface reflecting surfaces 3.

The diameter d and the divergence angle theta are adopted to satisfy: d =0.5 θ ² 2.15 θ +17.65 LED light source 1. The device is placed at a certain horizontal position with the special reflector 2 and has a certain inclination angle, according to the principle of light path reflection, light emitted by the LED light source 1 enters the curved surface reflecting surface 3 in the reflector and then projects most of light to the position right above the device, and rectangular light bars 6 with evenly distributed light intensity are formed.

The other part of light is reflected to the

plane reflectors

4 and 5 by the curved reflecting surface 3 and then reflected again, and finally the light is reflected to the right above the device to form a rectangular light bar 6, so that the width of the formed rectangular light bar is basically consistent, and the light intensity distribution is relatively even.

The LED light source 1 is arranged at a certain distance from the special reflector 2, the light source has a certain diameter, and a certain included angle and height are formed between the light source arrangement position and the plane position. The imaging quality of the final light bar can be better controlled by adjusting the position of the light source.

Light rays emitted by the LED light source 1 enter the special reflector 2, most of the light rays are directly reflected to the upper part by the curved surface reflecting surface 3 to form a rectangular light bar 6, and the size of the rectangular light bar 6 is about 600mm-20mm which is far larger than that of a designed light bar reflecting device. And the longitudinal uniformity of the light strip is better.

The curved surface reflecting surface 3 is respectively composed of multi-section arcs with different curvature radiuses and forms a smooth curved surface, the coordinates of the arc dividing points with different curvature radiuses meet a certain relation, and the multi-section arcs with different curvature radiuses are ensured to form a continuous curved surface reflecting surface as far as possible. The formed curved reflecting surface is as continuous and smooth as possible, and the finally formed rectangular light bar has better longitudinal uniformity.

The two sides of the curved surface reflecting surface 2 are added with the

plane reflectors

3 and 4, the

plane reflectors

3 and 4 and the vertical surface have certain included angles, and light which is not directly irradiated on the curved surface reflector 3 by a light source is reflected to the curved surface reflector 3 by the

plane reflectors

4 and 5, so that the widths of light stripes are basically consistent by the

plane reflectors

4 and 5 on the two sides, and simultaneously, more light sources are reflected to finally form an obvious rectangular light stripe.

Further specifically, in the above technical solution, the multi-section arc surfaces with different curvature radii are integrally formed, so that the design simplifies the production process and the assembly process of the reflector structure, and ensures the uniformity of the reflected rectangular light bar.

The invention has the beneficial effects that: the invention provides a light bar reflecting device capable of assisting in detecting vehicles, which can form a rectangular light bar with evenly distributed light intensity to realize auxiliary detection of the vehicles. Light emitted by an LED light source 1 in the device is incident into a special reflector 2, and a rectangular light strip 6 with good longitudinal uniformity and basically consistent width is formed after the light strip is reflected and projected by a curved surface reflecting surface 3 and

plane reflectors

4 and 5 in the special reflector 2, so that the purposes of illuminating a to-be-detected area of a vehicle and assisting in detecting the vehicle are achieved. The device provided by the invention has the characteristics of small volume, simple structure, portability and the like.

Description of the drawings

Fig. 1 is a schematic view of a light bar reflecting device.

Fig. 2 is a schematic structural view of the special reflector 2.

Fig. 3 is a schematic view of a light bar reflecting device reflecting light rays.

Fig. 4 is a mirror surface curvature table of the special mirror 2.

Fig. 5 is a schematic structural diagram of a special reflector 2 in the embodiment 1 of the light bar reflecting device.

Fig. 6 is a schematic structural diagram of a special reflector 2 in embodiment 2 of the light bar reflecting device.

(V) detailed description of the preferred embodiments

In order to make the technical features, objects and effects of the present device more clearly understood, the present invention will be further described with reference to specific embodiments.

Example 1:

in example 1, a schematic diagram is shown in fig. 5, and the special reflector 2 is composed of only the curved light-reflecting surface 3 and does not have the two-

sided plane reflectors

4 and 5.

In the embodiment, the LED light source 1 with the diameter of 16mm and the divergence angle of 3.3 degrees is selected, light is emitted and irradiated on the curved surface reflecting surface 3, and a rectangular light bar is formed above the device by directly reflecting the light.

In this embodiment, the rectangular light bars have a dimension of 600 × 20mm, and have good longitudinal uniformity, but the light bars have different widths, and the width of the light bars is about 14-24mm, which has a large difference.

Example 2:

in embodiment 2, a schematic diagram is shown in fig. 6, and the special reflector 2 is composed of a curved reflecting surface 3 formed by ten arc surfaces with different curvature radii, and

planar reflectors

4 and 5 on two sides.

In this embodiment, an LED light source 1 with a diameter of 16mm and a divergence angle of 3.3 ° is selected, a part of the emitted light irradiates the curved surface reflective surface 3, and forms a rectangular light bar with non-uniform width and non-uniform light intensity right above the device through reflection, and another part of the light irradiates the

planar reflectors

4 and 5 on both sides, and then is reflected to the curved surface reflective surface 3, and is reflected right above the device again to form the rectangular light bar.

In this embodiment, the size of the rectangular light bar is 600 × 20mm, the longitudinal uniformity is poor, the intensity of the rectangular light bar is uneven, the front intensity of the light bar is stronger, and the rear intensity is gradually reduced until no light bar exists.

The preferred embodiment:

fig. 1 shows a schematic view of a light bar reflecting device.

The device consists of an LED light source 1 and a special reflector 2.

In this embodiment, the LED light source 1 having a diameter of 16mm and a divergence angle of 3.3 ° is selected.

As can be seen from the figure, a certain horizontal distance exists between the LED light source 1 and the special reflector 2, and the light source placement position and the plane position have a certain included angle and height, in this embodiment, the LED light source 1 is located at a position 50mm from the horizontal position of the special reflector 2, the vertical height from the center of the LED light source 1 to the special reflector 2 is 10mm, and the inclination angle is 66.27 °.

The light emitted by the LED light source 1 which meets the corresponding conditions in the embodiment is irradiated to the special reflector 2.

In this embodiment, the light beam irradiates the curved reflective surface 3 formed by the multi-segment arcs with different curvature radiuses and is reflected, a part of the light beam is directly reflected to the right above the device to form a rectangular light bar 6, and the other part of the light beam is reflected to the

plane reflectors

4 and 5 on the two sides of the curved reflective surface 3, and is reflected back to the curved reflective surface 3 again through the

plane reflectors

4 and 5 on the two sides and then is reflected to the position 100mm right above the device.

A schematic diagram of light reflected by the special reflector 2 is shown in fig. 3, and the reflected light converges right above the device to form a rectangular light bar 6.

Referring to fig. 2, the special reflector 2 is composed of a curved reflecting surface 3 and

plane reflectors

4 and 5.

In this embodiment, the curved reflective surface 3 is composed of five arc surfaces with different curvature radii, respectively, and forms a smooth curved surface, and the coordinates of the arc demarcation points a, B, C, D, and E with different curvature radii satisfy:

y＝0.2832lnx+0.5985 (1)；

in the formula (1), x is a horizontal coordinate value with the point O as the origin, and y is a vertical coordinate value with the point O as the origin.

Fig. 4 shows the parameters related to the surface curvature of the curved reflective surface 3 in this embodiment, and the parameters are shown in the table, where X and Y are coordinate values from the center of each arc to the point O (origin), and R is the radius value of the circle corresponding to the five arcs.

In this embodiment, the

plane reflectors

4 and 5 on both sides of the curved reflective surface 3 are composed of two reflective plates with a size of 33.938mm 1mm, and have a certain included angle of 5.71 ° with the curved reflective surface 3.

In this embodiment, the rectangular light bars have a large area, a size of 20 × 600mm, substantially uniform width, and good longitudinal uniformity, and are the most preferable embodiment.

The device size is less, portable and put, and is more convenient high-efficient when supplementary detection vehicle.

The device forms ideal rectangular light bars after reflecting the light source through the designed light bar reflecting device, and the light intensity longitudinal uniformity of the light bars is better, and the irradiation area is large.

The device can be applied to irradiation scanning during vehicle detection. The method can be applied to other places according to actual conditions.

The relevant parameters of the above examples are only illustrative of one preferred embodiment of the invention.

The foregoing examples are illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A light bar reflecting device capable of assisting in detecting vehicles. The method is characterized in that: the small-size light bar reflecting device emits light from an LED light source 1, and the light irradiates a special reflector 2 which is at a certain distance from the LED light source 1; the light source forms a rectangular light strip 6 with evenly distributed light intensity right above the light strip reflecting device after being reflected by a curved surface reflecting surface 3 with five sections of different curvatures in the special reflector 2 and plane reflectors 4 and 5 at two sides of the curved surface reflecting surface 3.

2. LED light source 1 according to claim 1, characterized in that: with the diameter d and the divergence angle θ satisfying: d =0.5 θ ² 2.15 theta +17.65 LED light source, which is placed at a certain distance from the horizontal position of the reflector, and the light source placing position and the plane position have a certain included angle and height, so as to ensure that the reflector device reflects light rays to form a rectangular light bar with evenly distributed light intensity, and the expected effect of the device can be achieved.

3. The curved light-reflecting surface 3 of claim 1, wherein: the surface of the curved surface light reflecting surface 3 is designed to be composed of multi-section arcs with different curvature radiuses, the coordinates of the arc dividing points with different curvature radiuses meet the relation that y =0.2832lnx +0.5985, and the multi-section arcs with different curvature radiuses are ensured to form a continuous curved surface light reflecting surface with uniform light intensity distribution after reflection as far as possible.

4. A plane mirror 4, 5 according to claim 1, characterized in that: two sides of the curved reflecting surface 3 are respectively provided with plane reflectors 4 and 5 with certain width and included angle. The light which is not directly irradiated on the curved surface reflector 3 by the light source is reflected to the curved surface reflector 3 by the plane reflectors 4 and 5, so that the widths of the light bars are basically consistent by the plane reflectors 4 and 5 on the two sides, and simultaneously, the obvious rectangular light bar is finally formed after more light sources are reflected.