A vehicle exhaust black smoke simulation system and method

Abstract

The present invention is applicable to the technical field of exhaust gas monitoring, and provides a motor vehicle exhaust black smoke simulation system, comprising a meteorological collector and a camera installed on a test road, and a display device, a central processing unit and a ground camera arranged on a test vehicle, wherein the meteorological collector and the camera communicate with the central processing unit via a communication device, the meteorological collector is used to collect meteorological data in real time, and the camera is used to capture the test vehicle; the display device and the ground camera communicate with the central processing unit, the ground camera is used to obtain the image features of the ground, and the central processing unit generates a black smoke simulation image. The present invention has the beneficial effects of combining augmented reality technology AR, air fluid mechanics diffusion model and high-frequency LED wide-angle display technology to achieve reusable, adjustable and pollution-free simulation of motor vehicle exhaust black smoke, and provide an available metrological calibration standard reference for black smoke vehicle video capture equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of exhaust gas monitoring, and in particular to a system and method for simulating black smoke from motor vehicle exhaust. Background Art

[0002] The emerging black smoke vehicle video capture method uses a camera to record vehicles on the road, and uses mobile tracking and image AI recognition technology to identify and capture black smoke from vehicle exhaust to achieve regulatory goals. At present, there is no effective metrological verification method for black smoke vehicle video capture equipment. The key lies in the lack of simulation devices suitable for motor vehicle exhaust black smoke captured by cameras. Existing simulation methods include the following:

[0003] (1) Particle generator

[0004] Based on the principle of combustion carbon black aerosol generation, using diffusion flame or premixed flame, real combustion carbon black aerosol particles are produced, with a particle size range of nanometers and a concentration limit of 10 8 particle / cm 3 The diameter of these particles is too small and the upper limit of concentration is too low to produce black smoke visible to the naked eye, like the carbon black from diesel engines.

[0005] (2) Smoke generator

[0006] Compressed air and standard particle diluent are used to spray through a high-speed airflow atomizer head to form droplets, which are then mixed with the remaining clean air and dried to form monodisperse standard suspended particles. The color of the smoke in this method depends on the composition of the standard particle diluent, which is all light-colored and cannot reach the black color of diesel engine carbon particles, which will cause interference and misjudgment in the identification of black smoke in the video.

[0007] (3) Chemical combustion

[0008] Using gas or other chemicals to burn to produce black smoke is the best simulation method, but the concentration of black smoke is difficult to control. There are a lot of harmful substances in the black smoke, which are directly discharged into the air to pollute the environment. In addition, such combustion devices are difficult to install on motor vehicles to simulate a moving vehicle, and there is a certain degree of danger. Summary of the invention

[0009] The purpose of the embodiments of the present invention is to provide a system and method for simulating black smoke from motor vehicle exhaust, aiming to solve the problem that the prior art lacks a simulation device for black smoke from motor vehicle exhaust that is suitable for capturing with a camera.

[0010] An embodiment of the present invention is implemented as follows: a motor vehicle exhaust black smoke simulation system includes a meteorological collector and a camera installed on a test road, and a display device, a central processing unit and a ground camera arranged on the test vehicle. The meteorological collector and the camera communicate with the central processing unit via a communication device, the meteorological collector is used to collect meteorological data in real time, and the camera is used to take snapshots of the test vehicle; the display device and the ground camera communicate with the central processing unit, the ground camera is used to obtain image features of the ground, and the central processing unit generates a black smoke simulation video.

[0011] As a further solution of the present invention: the display device is a full-color LED screen, and the full-color LED screen is a non-mirror screen.

[0012] As a further solution of the present invention: the ground camera is also used to shoot the starting position and the end position on the test road to determine the test starting point and the test end point.

[0013] As a further solution of the present invention: the communication device realizes communication between the camera, the weather collector and the central processing unit through wireless communication.

[0014] Another object of the embodiment of the present invention is to provide a method for simulating black smoke from motor vehicle exhaust, comprising the following steps:

[0015] S1, calibrate the starting position and the end position on the test road as the starting and ending positions of the simulated black smoke generation;

[0016] S2, collect meteorological data in real time and send the obtained meteorological data to the central processing unit;

[0017] S3, the test vehicle travels through the starting position and the end position on the test road, and the test vehicle is a vehicle with zero tail gas emissions;

[0018] S4, when the ground camera on the test vehicle captures the starting position, the black smoke simulation starts, and the central processing unit obtains the image grayscale, vehicle speed and background light intensity according to the ground image features captured by the ground camera, and the central processing unit obtains the real-time speed information of the test vehicle. The central processing unit establishes a mathematical model according to the obtained real-time speed information of the test vehicle and the input black smoke particle size and vehicle displacement, imports the air fluid mechanics diffusion model and black smoke concentration level, and combines with meteorological data to dynamically generate a black smoke simulation image, superimpose it on the real background, and through augmented reality AR, the central processing unit generates a black smoke video through deep learning simulation, and displays the black smoke video through a display device. The picture displayed by the display device is captured by a camera installed on the test road.

[0019] As a further solution of the present invention: the display device is a full-color LED screen, the full-color LED screen is a non-mirror screen, and the viewing angle of the full-color LED screen is 160°.

[0020] As a further solution of the present invention: the meteorological data is detected by a meteorological data collector, the meteorological data includes wind speed, wind direction, temperature, humidity and air pressure, and the meteorological data collector communicates with a central processing unit.

[0021] As a further solution of the present invention: the weather collector communicates with the central processing unit wirelessly.

[0022] Compared with the prior art, the beneficial effects of the present invention are: it combines augmented reality technology AR, air fluid mechanics diffusion model and high-frequency LED wide-viewing angle display technology to achieve reusable, adjustable and pollution-free simulation of black smoke from motor vehicle exhaust, and provides an available metrological calibration standard reference for black smoke vehicle video capture equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure is a control principle diagram of a motor vehicle exhaust black smoke simulation system.

[0024] Figure 2 The figure is a structural diagram of a motor vehicle exhaust black smoke simulation system.

[0025] Figure 3 The figure is a working principle diagram of a motor vehicle exhaust black smoke simulation system. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0028] like Figures 1-2 As shown, a method for simulating black smoke from motor vehicle exhaust provided by an embodiment of the present invention comprises the following steps:

[0029] S1, calibrating the starting position and the ending position on the test road as the starting and ending positions of simulating the generation of black smoke. The starting and ending positions can be calibrated by drawing horizontal lines on the test road;

[0030] S2, collect meteorological data in real time and send the obtained meteorological data to the central processing unit;

[0031] S3, the test vehicle travels through the starting position and the end position on the test road, and the test vehicle is a vehicle with zero tail gas emissions;

[0032] S4, when the ground camera on the test vehicle captures the starting position, the black smoke simulation starts, and the central processing unit obtains the image grayscale, vehicle speed and background light intensity according to the ground image features captured by the ground camera, and the central processing unit obtains the real-time speed information of the test vehicle. The central processing unit establishes a mathematical model according to the obtained real-time speed information of the test vehicle and the input black smoke particle size and vehicle displacement, imports the air fluid mechanics diffusion model and black smoke concentration level, and combines with meteorological data to dynamically generate a black smoke simulation image, superimpose it on the real background, and through augmented reality AR, the central processing unit generates a black smoke video through deep learning simulation, and displays the black smoke video through a display device. The picture displayed by the display device is captured by a camera installed on the test road.

[0033] In addition, in one case of this embodiment, the installation method of the equipment used in this embodiment, such as the weather collector, the display device, etc., can be adaptively changed according to actual application needs.

[0034] like Figures 1-2 As shown, as a preferred embodiment of the present invention, the display device is a full-color LED screen. The high refresh rate of the full-color LED screen can ensure that the image is flicker-free. In addition, the full-color LED screen is a non-mirror screen to ensure that there is no reflection interference under sunlight and other light sources. The viewing angle of the full-color LED screen is preferably 160°, and the extremely wide viewing angle ensures that the change in the angle between the vehicle and the camera caused by the driving process has no effect on the recorded image.

[0035] The parameters of the full-color LED screen are as follows:

[0036] Pixel pitch: 5mm;

[0037] Pixel density: 40,000 dots / m 2 ;

[0038] Screen brightness: 7500cd / m 2 ;

[0039] Service life: 80,000 hours;

[0040] Mean time between failures: 10,000 hours;

[0041] Refresh rate: 300Hz.

[0042] like Figures 1-2As shown, as another preferred embodiment of the present invention, the meteorological data is detected by a meteorological collector, and the meteorological data includes wind speed, wind direction, temperature, humidity and air pressure, and the meteorological collector communicates with a central processing unit; further, the meteorological collector communicates with the central processing unit wirelessly, such as wireless network, 4G, 5G, Bluetooth and other wireless communication methods, without specific limitation.

[0043] like Figures 1-2 As shown, an embodiment of the present invention further provides a motor vehicle exhaust black smoke simulation system, comprising a meteorological collector and a camera installed on a test road, and a display device, a central processing unit and a ground camera arranged on a test vehicle, wherein the meteorological collector and the camera communicate with the central processing unit via a communication device, the meteorological collector is used to collect meteorological data in real time, specifically, the meteorological data includes wind speed, wind direction, temperature, humidity and air pressure, which can be sent to the central processing unit via a communication device, and the camera is used to capture the test vehicle; the display device and the ground camera communicate with the central processing unit, and the ground camera is used to capture the test vehicle; In order to obtain the image features of the ground, the central processing unit obtains the image grayscale, vehicle speed and background light intensity according to the ground image features collected by the ground camera, and the central processing unit obtains the real-time speed information of the test vehicle. The central processing unit establishes a mathematical model according to the obtained real-time speed information of the test vehicle and the input black smoke particle size and vehicle displacement, imports the air fluid mechanics diffusion model and the black smoke concentration level, and combines with meteorological data to dynamically generate a black smoke simulation image, which is superimposed on the real background. Through augmented reality AR, the central processing unit generates a black smoke video through deep learning simulation. The display device is used to play the black smoke video, which can be captured by the camera.

[0044] Specifically, the display device is a full-color LED screen. The high refresh rate of the full-color LED screen can ensure that the image is flicker-free. In addition, the full-color LED screen is a non-mirror screen to ensure that there is no reflection interference under sunlight and other light sources. The viewing angle of the full-color LED screen is preferably 160°. The extremely wide viewing angle ensures that the changes in the angle between the vehicle and the camera caused by the driving process have no effect on the recorded image.

[0045] The ground camera is also used to shoot the starting position and the end position on the test road to test the starting or end point signal. The starting position and the end point on the test road can be calibrated by drawing white lines on the test road. When the ground camera captures the white lines, the test starting point and the test end point can be determined by analyzing the video images, that is, the test and the synthesis of the video images can be started. The ground camera and the display device can be installed on the test vehicle through a stainless steel lock or a stainless steel bracket. As long as the above components can be installed, the installation method is not specifically limited.

[0046] In one case of this embodiment, for the convenience of simulation test, the communication device is preferably a wireless communication method, such as wireless network, 4G, 5G, Bluetooth and other wireless communication methods, which are not specifically limited. Of course, if it can be ensured that the movement of the test vehicle is not affected by the wired communication method, it is also possible to consider using a wired communication method, such as a cable.

[0047] like Figure 3 As shown, in one case of the present embodiment, a test vehicle is traveling on a test road, and the test vehicle is a vehicle with zero tail gas emissions, such as an electric car. When the ground camera captures the white line on the test road, a simulation test is started at this time. The central processing unit obtains the image grayscale, vehicle speed and background light intensity according to the ground image features collected by the ground camera, and the central processing unit obtains the real-time vehicle speed information of the test vehicle (specifically, the speed can be obtained by connecting to the test vehicle CAN bus). The central processing unit establishes a mathematical model based on the obtained real-time speed information of the test vehicle and the input black smoke particle size and vehicle displacement, imports an air fluid mechanics diffusion model and a black smoke concentration level, and combines meteorological data to dynamically generate a black smoke simulation image, which is superimposed on a real background. Through augmented reality AR, the central processing unit generates a black smoke video through deep learning simulation, and displays the black smoke video through a display device.

[0048] The above-mentioned embodiment of the present invention provides a motor vehicle exhaust black smoke simulation system, and proposes a motor vehicle exhaust black smoke simulation method based on the motor vehicle exhaust black smoke simulation system, which combines augmented reality technology AR, air fluid mechanics diffusion model and high-frequency LED wide-angle display technology to achieve reusable, adjustable and pollution-free simulation of motor vehicle exhaust black smoke, and provides an available metrological calibration standard reference for black smoke vehicle video capture equipment.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for simulating black smoke from motor vehicle exhaust, comprising a meteorological collector and a camera installed on a test road, and a display device, a central processing unit and a ground camera arranged on a test vehicle, wherein the meteorological collector and the camera communicate with the central processing unit via a communication device, the meteorological collector is used to collect meteorological data in real time, and the camera is used to take snapshots of the test vehicle; the display device and the ground camera communicate with the central processing unit, the ground camera is used to obtain image features of the ground, and the central processing unit generates a black smoke simulation video, characterized in that: The following steps are also included: S1, calibrate the starting position and the end position on the test road as the starting and ending positions of the simulated black smoke generation; S2, collect meteorological data in real time and send the obtained meteorological data to the central processing unit; S3, the test vehicle travels through the starting position and the end position on the test road, and the test vehicle is a vehicle with zero tail gas emissions; S4, when the ground camera on the test vehicle captures the starting position, the black smoke simulation starts, and the central processing unit obtains the image grayscale, vehicle speed and background light intensity according to the ground image features captured by the ground camera, and the central processing unit obtains the real-time speed information of the test vehicle. The central processing unit establishes a mathematical model according to the obtained real-time speed information of the test vehicle and the input black smoke particle size and vehicle displacement, imports the air fluid mechanics diffusion model and black smoke concentration level, and combines with meteorological data to dynamically generate a black smoke simulation image, superimpose it on the real background, and through augmented reality AR, the central processing unit generates a black smoke video through deep learning simulation, and displays the black smoke video through a display device. The picture displayed by the display device is captured by a camera installed on the test road.

2. A method for simulating black smoke from motor vehicle exhaust according to claim 1, characterized in that: The display device is a full-color LED screen, which is a non-mirror screen and has a viewing angle of 160°.

3. The method for simulating black smoke from motor vehicle exhaust according to claim 1, characterized in that: The meteorological data is detected by a meteorological data collector, and the meteorological data includes wind speed, wind direction, temperature, humidity and air pressure. The meteorological data collector communicates with a central processing unit.

4. A method for simulating black smoke from motor vehicle exhaust according to claim 3, characterized in that: The meteorological collection instrument communicates with the central processing unit in a wireless manner.

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