A highway visibility detection device

Abstract

The present invention discloses a highway visibility detection device, comprising a mounting housing, a detection device, a convex lens, a visible light filter and a reflector. The detection device, the convex lens, the visible light filter and the reflector are arranged in sequence and at intervals on the same straight line. The detection device has a light emitter, an infrared emitter, a visible light detector and an infrared light detector all facing the convex lens. The reflector is an infrared light reflector that reflects the infrared light back along the original path. Compared with the prior art, by using the emission and reception of the visible light spectrum and the coordinated use of the visible light filter, the number of infrared light backward heat dissipation photons and the number of infrared light transmission photons can be obtained, so that the number of infrared light backward heat dissipation photons can be taken into account when calculating visibility, which greatly improves the accuracy of visibility calculation, thereby making the detection accuracy of the detection device higher.

Description

Technical Field

[0001] The invention relates to the field of traffic road detection, and in particular to a device for detecting visibility on a highway. Background Art

[0002] Fog is an important factor that seriously affects the safety of highway driving. Fog is very harmful. According to the statistics of traffic accidents on highways across the country, many highway traffic accidents are closely related to fog. Since fog can cause visibility to decrease, the sudden decrease in visibility will seriously affect the driver's driving judgment. The randomness of fog in time and place will increase the safety hazards of highway driving. In addition, the inherent defects of highways, such as high speed, large traffic volume and full closure, often lead to major traffic accidents and cause serious economic losses. Therefore, it is of great significance to monitor and warn the visibility of fog in a timely, accurate and effective manner.

[0003] The existing detection method of fog group detection is to set a light source generating device and a light detector receiving the light source emitted by the light source generating device on the road surface. The distance between the light source generating device and the light detector needs to be between 40cm-100m to be calculated, and the visibility is detected by the light source emitted and the amount of light received. However, this kind of visibility detection device has a long optical path and is easily affected by water vapor during the propagation process to produce backscattering. This backscattered light is not received by the light detector, resulting in less accurate detection.

[0004] For this reason, the inventor conducted in-depth research on the above-mentioned problem, which resulted in the present case. Summary of the invention

[0005] The purpose of the present invention is to provide a highway visibility detection device with accurate detection.

[0006] In order to achieve the above-mentioned purpose, the solution of the present invention is as follows: a highway visibility detection device, comprising a mounting shell, a detection device, a convex lens, a visible light filter and a reflector, wherein the detection device is mounted in the mounting shell, the detection device, the convex lens, the visible light filter and the reflector are sequentially arranged in sequence on the same straight line, the convex lens, the visible light filter and the reflector are arranged vertically, and the detection device has a light emitter capable of emitting visible light, an infrared emitter capable of emitting infrared light, a visible light detector capable of receiving visible light and a An infrared light detector for receiving infrared light, the emission direction of the light emitter, the emission direction of the infrared emitter, the receiving direction of the visible light detector and the receiving direction of the infrared light detector are all toward the convex lens, the mounting shell is provided with a window for light emission and injection, the distance between the detection device and the convex lens is 3-10cm, the distance between the convex lens and the visible light filter is 15-25cm, the visible light filter and the reflector are arranged close to each other, and the reflector is an infrared light reflector for reflecting the infrared light back along the original path.

[0007] The reflective member is a column with a 3MM reflective film attached to one side thereof facing the visible light filter.

[0008] The above-mentioned column is a prism.

[0009] The distance between the detection device and the convex lens is 5 cm, the distance between the convex lens and the visible light filter is 20 cm, and the visible light filter is tightly matched with the reflective element.

[0010] The light emitter is a red light emitter, and the visible light detector is a red light detector.

[0011] The above-mentioned mounting shell is installed on a vertically arranged column, and a horizontal bracket is provided at the upper end of the above-mentioned column. The first end of the horizontal bracket is vertically arranged on a side surface of the column, and the second end extends away from the column. The above-mentioned mounting shell is installed on a side surface of the column and is on the same side surface of the column as the horizontal bracket. The above-mentioned convex lens, visible light filter and reflective element are all installed on the lower bottom surface of the horizontal bracket.

[0012] It also includes a solar power supply device having a solar panel, a rechargeable battery and a controller. The solar panel is installed on the top surface of the horizontal bracket, the rechargeable battery and the controller are installed in a mounting shell, and the rechargeable battery is connected to the detection device for power supply.

[0013] The above-mentioned column is located below the installation shell and is provided with a red light, a yellow light and a green light.

[0014] After adopting the above technical scheme, a highway visibility detection device of the present invention utilizes the emission and reception of the visible light spectrum and the coordinated use of visible light filters to obtain the number of infrared light backward heat dissipation photons and the number of infrared light transmission photons, so that the number of infrared light backward heat dissipation photons can be taken into account when calculating visibility, which greatly improves the accuracy of visibility calculation, thereby making the detection accuracy of the detection device higher. At the same time, the entire device has a simple structure and is easy to arrange, install and maintain. The entire device consumes little electricity, which can protect the long-term operation of the entire device and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is a stereogram of the present invention. DETAILED DESCRIPTION

[0017] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0018] A highway visibility detection device of the present invention, such as Figure 1 , 2 As shown, it includes a detection device 1, a convex lens 2, a visible light filter 3 and a reflector 4. The detection device 1, the convex lens 2, the visible light filter 3 and the reflector 4 are arranged in sequence and at intervals on the same straight line. The convex lens 2, the visible light filter 3 and the reflector 4 are arranged vertically. The detection device 1 has a light emitter (not shown in the figure) that can emit visible light 100, an infrared emitter (not shown in the figure) that can emit infrared light 200, a visible light detector that receives visible light and an infrared light detector that receives infrared light. This light emitter, infrared emitter, visible light detector and infrared light detector are all well-known. The emission direction of the light emitter, the emission direction of the infrared emitter, the receiving direction of the visible light detector and the receiving direction of the infrared light detector are all toward the convex lens 2. In the present invention, the light emitter is preferably a red light emitter, and the visible light detector is correspondingly a red light detector.

[0019] The distance between the detection device 1 and the convex lens 2 is 3-10cm. Preferably, the distance between the emitting end of the light emitter, the emitting end of the infrared emitter, the detection end of the visible light detector and the detection end of the infrared light detector and the convex lens 2 is 5cm. The distance between the convex lens 2 and the visible light filter 3 is 15-25cm, preferably 20cm. The visible light filter 3 and the reflector 4 are arranged close to each other, preferably in close fit. The reflector 4 is an infrared light reflector that reflects the infrared light back along the original path.

[0020] The present invention discloses a highway visibility detection device. When used, the detection device emits red light 100 and infrared light 200. The red light and infrared light pass through a convex lens 2 to a visible light filter 3. At this time, the red light and infrared light are affected by particles in the air during the process of propagating to the visible light filter. A small amount of backscattering occurs in the red light and infrared light, and most of the red light is filtered out by the visible light filter 3 and cannot be reflected back to the infrared detector. Therefore, the number of photons received by the red light detector is the number of photons dissipated by the red light backward. The infrared light 200 passes through the visible light filter 3 to a reflector 4 and is reflected back to the detection device by the reflector 4 along the original path, so that the infrared light detector at the detection device The number of received photons is the sum of the number of infrared light transmission photons and the number of infrared light backward heat dissipation photons. The use of this device can take the backward heat dissipation photons into account when calculating visibility, avoiding the problem of traditional visibility calculation not considering backward heat dissipation, greatly improving the calculation accuracy of visibility, and thus making the detection accuracy of the detection device higher. At the same time, the entire device has a simple structure and is easy to arrange, install and maintain. In addition, the entire detection adopts reflective detection, which is relatively simple to calibrate the optical path compared to traditional split-type detection. Under the condition that the optical path remains unchanged, the installation distance between the emitter and the detector of the new type can be reduced by half, greatly reducing the footprint of the entire device.

[0021] In the present invention, the reflector 4 is a column with a 3MM reflective film attached to the side facing the visible light filter. Preferably, the column is a prism. By utilizing the cooperation of the 3MM reflective film and the prism, infrared light at different angles can be reflected back, further ensuring the accuracy of visibility calculation.

[0022] In this new type, Figure 2 As shown, the detection device is installed on a mounting shell 5, which is a detachable shell or a relatively snap-fitting buckle box. The mounting shell 5 is installed on a vertically arranged column 6, which is a metal column. A cross bracket 7 is provided at the upper end of the column 6, which is a metal bracket. The column and the cross bracket form an inverted L shape, and the cross bracket is located on the right side surface of the upper end of the column. The first end of the cross bracket 7 is vertically arranged to the right side surface of the column 6, and the second end extends back to the column. The mounting shell 5 is locked and installed on the right side surface of the column 6. The right side surface of the mounting shell 5 has a light window for light to be emitted or injected, and the convex lens 2, the visible light filter 3 and the reflector 4 are all installed on the lower bottom surface of the cross bracket 7; the mounting shell 5 can be used to prevent the optical lens of the detection device from being contaminated, enhance the detection accuracy, and utilize the mounting shell disassembly structure to facilitate the installation and maintenance of the detection device, and utilize the column and the cross bracket to install the detection device.

[0023] In the present invention, the highway visibility detection device also includes a solar power supply device having a solar panel, a rechargeable battery and a controller. This solar power supply device is a well-known technology and will not be described here. The solar panel is installed on the top surface of the horizontal bracket, and the rechargeable battery and the controller are installed in the installation shell. The rechargeable battery is electrically connected to the power supply end of the detection device, that is, the rechargeable battery is electrically connected to the power supply end of the red light emitter, the infrared emitter, the visible light detector and the infrared light detector to supply power to the light emitter, the infrared emitter, the visible light detector and the infrared light detector. This electrical connection method is well-known. The use of the solar power supply device facilitates the installation and application of the entire detection device, and the entire device consumes little power, can protect the long-term operation of the entire device, and is easy to use.

[0024] In the present invention, a red light (not shown in the figure), a yellow light (not shown in the figure) and a green light (not shown in the figure) are arranged on the right side of the column 6 below the mounting shell. The red light, the yellow light and the green light are all LED lights. A rechargeable battery supplies power to each LED light. The three-color LED light can detect the result of the detection device and control each LED light to light up accordingly, which can serve as a safety warning for the driver.

[0025] The above embodiments and drawings do not limit the structure of the present invention. Any appropriate changes or modifications made thereto by a person of ordinary skill in the art should be deemed to be within the patent scope of the present invention.

Claims

1. A highway visibility detection device, characterized in that : It includes an installation shell, a detection device, a convex lens, a visible light filter and a reflector. The detection device is installed in the installation shell. The detection device, the convex lens, the visible light filter and the reflector are arranged in sequence on the same straight line. The convex lens, the visible light filter and the reflector are arranged vertically. The detection device has a light emitter that can emit visible light, an infrared emitter that can emit infrared light, a visible light detector that receives visible light and an infrared light detector that receives infrared light. The emission direction of the light emitter, the emission direction of the infrared emitter, the receiving direction of the visible light detector and the receiving direction of the infrared light detector are all toward the convex lens. A window for light to be emitted and injected is opened on the installation shell. The spacing between the detection device and the convex lens is 3-10cm, the spacing between the convex lens and the visible light filter is 15-25cm, the visible light filter and the reflector are arranged close to each other, and the reflector is an infrared light reflector that reflects the infrared light back along the original path.

2. A highway visibility detection device according to claim 1, characterized in that: The reflective member is a column with a 3MM reflective film attached to one side thereof facing the visible light filter.

3. A highway visibility detection device according to claim 2, characterized in that: The above-mentioned column is a prism.

4. The highway visibility detection device according to claim 1, characterized in that: The distance between the detection device and the convex lens is 5 cm, the distance between the convex lens and the visible light filter is 20 cm, and the visible light filter is tightly matched with the reflective element.

5. The highway visibility detection device according to claim 1, characterized in that: The light emitter is a red light emitter, and the visible light detector is a red light detector.

6. The highway visibility detection device according to claim 1, characterized in that: The above-mentioned mounting shell is installed on a vertically arranged column, and a horizontal bracket is provided at the upper end of the above-mentioned column. The first end of the horizontal bracket is vertically arranged on a side surface of the column, and the second end extends away from the column. The above-mentioned mounting shell is installed on a side surface of the column and is on the same side surface of the column as the horizontal bracket. The above-mentioned convex lens, visible light filter and reflective element are all installed on the lower bottom surface of the horizontal bracket.

7. The highway visibility detection device according to claim 6, characterized in that: It also includes a solar power supply device having a solar panel, a rechargeable battery and a controller. The solar panel is installed on the top surface of the horizontal bracket, the rechargeable battery and the controller are installed in a mounting shell, and the rechargeable battery is connected to the detection device for power supply.

8. The highway visibility detection device according to claim 6, characterized in that: The above-mentioned column is located below the installation shell and is provided with a red light, a yellow light and a green light.

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