Highway agglomerate fog monitoring device

Abstract

The embodiment of the utility model discloses an expressway agglomerate fog monitoring device which comprises a shell, a controller, a sensor module and a communication module are arranged in the shell, and a detection hole for air inflow is formed in the shell; the sensor module and the communication module are respectively connected with the controller; wherein the sensor module comprises a laser scattering sensor based on a particle counter and is connected with the controller through a communication interface, and the communication module is further connected with an external cloud platform; the system has the beneficial effects that the whole scheme is low in cost, convenient to deploy, convenient for large-area layout and low in requirement on an installation environment; the defects of high cost and easiness in being influenced by external environmental factors in the prior art are overcome; and meanwhile, monitored information is pushed to an external cloud platform for display by using the communication module, so that the expressway agglomerate fog management level and service efficiency are also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of traffic monitoring, in particular to a freeway advection fog monitoring device. Background Art

[0002] Advection fog is fog that is thicker and has lower visibility within a local range of dozens to hundreds of meters in thick fog, affected by the microclimate environment of the local area. Existing freeway advection fog monitoring mainly relies on visibility automatic observation instruments or video analysis and recognition, but both have different degrees of defects.

[0003] In some economically developed provinces and cities in China, visibility automatic observation instruments installed on freeways are distributed at intervals of 10 kilometers. In some less developed areas, the maximum interval reaches 30 kilometers or even farther. However, since the size of advection fog is generally only a few hundred meters or even smaller, it is very difficult for visibility sensors to capture. In addition, the cost of visibility equipment is high, it is not suitable for dense distribution, and there are large blind spots.

[0004] Based on intelligent video analysis and recognition technology, that is, by analyzing on-site video images, the visibility of video images is automatically detected and recognized, the concentration and visible distance of advection fog on traffic roads are monitored in real time, pictures are captured and alarms are given in a timely manner. However, in the case of strong backlight interference or low light at night, the video images cannot clearly capture the on-site situation, resulting in deviation of the analysis results. For example, in thunderstorms, rainy and foggy days, and at night, the monitoring effect of cameras is greatly reduced. In the case of no light at night, strong backlight interference, no supplementary light for cameras, (old cameras) unstable video data, and various complex weather conditions, it is very complicated to determine the video stream analysis calculation model.

[0005] Therefore, there are defects in the prior art such as high cost, inability to achieve encrypted monitoring, and being easily affected by external environmental factors during video analysis and recognition, resulting in poor advection fog monitoring effects at night or in a dimly lit environment. Content of the Utility Model

[0006] Aiming at the defects in the prior art, the utility model provides a freeway advection fog monitoring device to overcome the defects of high cost and being easily affected by external environmental factors existing in the prior art.

[0007] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] A freeway advection fog monitoring device includes a housing, a controller, a sensor module and a communication module are arranged inside the housing, and a detection hole for air inflow is arranged on the housing;

[0009] The sensor module and the communication module are respectively connected to the controller; wherein, the sensor module includes a laser scattering sensor based on a particle counter and is connected to the controller through a communication interface, and the communication module is also connected to an external cloud platform.

[0010] Preferably, the communication module is configured with dual-mode communication and includes an Internet of Things communication module and a Beidou short message module.

[0011] Preferably, the sensor module further includes a positioning module, a temperature and humidity sensor, and a barometric pressure sensor, and the positioning module, the temperature and humidity sensor, and the barometric pressure sensor are all connected to the controller through communication interfaces respectively.

[0012] Preferably, the communication interface adopts a UART interface and / or an I 2 C interface.

[0013] Preferably, the number of the detection holes is multiple and they are evenly distributed on the housing.

[0014] Preferably, the laser source in the laser scattering sensor adopts a near-infrared semiconductor laser with a wavelength of 850 nm.

[0015] Preferably, the laser scattering sensor further includes a light scattering measurement cavity for making the sampled gas perpendicular to the incident laser beam of the laser source to generate light scattering.

[0016] Preferably, the controller adopts a microcontroller and has a specific storage space.

[0017] The beneficial effects of the present utility model are reflected in that: through the fog monitoring device based on a particle counter, the sensor itself has the characteristics of small floor area, low cost, simple installation, less maintenance, and being not affected by external environmental factors such as night, dim light, and backlight, and accurate monitoring can be implemented under any light conditions; the whole solution has low cost, convenient deployment, is easy to be arranged in a large area, and has low requirements for the installation environment; it overcomes the defects of high cost and being easily affected by external environmental factors existing in the prior art; at the same time, the communication module is also used to push the monitored information to an external cloud platform for display, which also improves the management level and service efficiency of fog on expressways. Description of the Drawings

[0018] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts do not necessarily draw according to the actual scale.

[0019] Figure 1Schematic diagram of the structure of a freeway patchy fog monitoring device provided by an embodiment of the present utility model;

[0020] Figure 2 Principle block diagram of a laser scattering sensor provided by an embodiment of the present utility model. Detailed implementation manners

[0021] The embodiments of the technical solutions of the present utility model will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present utility model more clearly, and thus are only examples and cannot be used to limit the protection scope of the present utility model.

[0022] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meanings understood by those skilled in the art to which the present utility model belongs.

[0023] As Figure 1 shown, the present utility model provides a freeway patchy fog monitoring device, including a housing, wherein a controller, a sensor module and a communication module are arranged in the housing, and a detection hole for air inflow is arranged on the housing;

[0024] The sensor module and the communication module are respectively connected to the controller; wherein, the sensor module includes a laser scattering sensor based on a particle counter and is connected to the controller through a communication interface, and the communication module is also connected to an external cloud platform.

[0025] During application, the device is also provided with a power module well known to those skilled in the art, and the power module can adopt a rechargeable battery, which will not be elaborated here.

[0026] In this embodiment, the communication module is set with dual-mode communication, including an Internet of Things communication module and a Beidou short message module; wherein, the Internet of Things communication module is used for data reception / sending; the Beidou short message module is used for message reception / sending.

[0027] Further, data collection is realized through the sensor module, and the collected data is transmitted to the controller; the controller adopts a microcontroller and has a specific storage space, such as STM32F103;

[0028] Further, the laser scattering sensor based on a particle counter can also be understood as a particulate matter sensor, such as WS20P; particulate matter measurement is carried out based on the laser scattering principle, that is, the laser is irradiated on the suspended particulate matter in the air to generate scattering, and at the same time, the scattered light is collected at a specific angle to obtain a curve of the scattered light intensity changing with time; furthermore, the microprocessor uses the Mie theory to obtain the equivalent particle size of the particulate matter and the number of particulate matters with different particle sizes per unit volume; the functional block diagrams of each part of the laser scattering sensor are asFigure 2 as shown

[0029] Specifically, the laser source in the laser scattering sensor uses a near-infrared semiconductor laser with a wavelength of 850 nm; the laser scattering sensor further includes a light scattering measurement cavity for making the sampled gas perpendicular to the incident laser beam of the laser source to generate light scattering. Here, the sampled gas can be understood as the air for sampling and detection.

[0030] That is, the particulate matter in the sampled gas will undergo an optical scattering phenomenon when irradiated by the laser beam; among them, the light energy scattered in the 90-degree direction is captured by the optical element, converged onto the photodetector, and after photoelectric conversion, it becomes a pulsed electrical signal, and then the obtained electrical signal is filtered and processed by the microprocessor to directly output the corresponding digital signal.

[0031] Further, to improve the monitoring accuracy, the number of the detection holes is multiple and they are evenly distributed on the housing; thus, when monitoring, the air in all directions can be introduced, thereby avoiding the limitation of sampling detection.

[0032] Further, to improve the comprehensiveness of monitoring, the sensor module further includes a positioning module, a temperature and humidity sensor, and a barometric pressure sensor, and the positioning module, the temperature and humidity sensor, and the barometric pressure sensor are respectively connected to the controller through communication interfaces; thus, multi-dimensional parameter monitoring such as current positioning, temperature, humidity, and atmospheric pressure can be realized, which is convenient for comprehensively reflecting the external environment and meteorological information on the highway.

[0033] In this embodiment, the communication interface uses a UART interface and / or an I 2 C interface; thus, it is convenient to flexibly connect to the controller according to different modules.

[0034] The utility model relates to a fog monitoring device based on a particle counter, which has the characteristics of small floor area and low cost; simple installation and less maintenance; not being affected by external environmental factors such as night, dim light, and backlight, and can achieve accurate monitoring under any light conditions; making the whole solution have low cost, convenient deployment, easy large-area layout, and low requirements for the installation environment; overcoming the defects of high cost and being easily affected by external environmental factors existing in the prior art; at the same time, it also uses the communication module to push the monitored information to an external cloud platform for display, which also improves the fog management level and service efficiency on the highway.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention, and they should all be covered within the scope of the claims and the description of the present invention.

Claims

1. A highway fog monitoring device, comprising a housing, characterized in that , a controller, a sensor module and a communication module are arranged in the shell, and a detection hole for air inflow is arranged on the shell; The sensor module and the communication module are connected to the controller respectively; wherein the sensor module includes a laser scattering sensor based on a particle counter and is connected to the controller via a communication interface, and the communication module is also connected to an external cloud platform; The number of the detection holes is multiple and evenly distributed on the shell; The laser source in the laser scattering sensor adopts a near-infrared semiconductor laser with a wavelength of 850nm; the laser scattering sensor also includes a light scattering measurement cavity for making the sample gas perpendicular to the incident laser beam of the laser source to generate light scattering; the sample gas is air for sampling and detection.

2. A highway fog monitoring device according to claim 1, characterized in that ,The communication module adopts a dual-mode communication setting, including the Internet of Things ,communication module and the Beidou short message module.

3. A highway fog monitoring device according to claim 1, characterized in that The sensor module also includes a positioning module, a temperature and humidity sensor, and an air pressure sensor. The positioning module, the temperature and humidity sensor, and the air pressure sensor are connected to the controller through a communication interface respectively.

4. A highway fog monitoring device according to claim 3, characterized in that The communication interface adopts UART interface and / or I 2 C interface.

5. A highway fog monitoring device according to claim 4, characterized in that ,The controller adopts a microcontroller and has a specific storage space.

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