Brake particulate matter real-time acquisition device and acquisition method, electronic equipment and computer readable storage medium

Abstract

The invention provides a brake particulate matter real-time collection device and method, electronic equipment and a computer readable storage medium. The brake particulate matter real-time collection device comprises a brake simulation closed bin, and a rotating component, a brake component and a particulate matter collection system which are arranged in the brake simulation closed bin; a partition plate is arranged in the brake simulation closed bin, and the rotating component and the brake component are arranged on the upper portion of the partition plate. The particulate matter collection system is arranged at the lower part of the partition plate; the rotating part comprises a hub and a first motor, the hub is arranged in the middle of the partition plate, and the left side of the hub is in transmission connection with the first motor through a connecting shaft; the brake component is located on the right side of the hub and comprises a second motor, a brake mechanism and a brake mechanism, the second motor is in driving connection with the brake mechanism, the brake mechanism is connected to the front end of the brake mechanism, and the second motor can drive the brake mechanism to approach or leave towards the hub. The brake particulate matter real-time collecting device has the good particulate matter trapping capacity and can be widely applied to the related subject fields such as air pollution prevention and control.

Description

Technical Field

[0001] The present invention relates to the field of pollutant collection methods, and in particular to a real-time collection device and method for collecting brake particles, an electronic device, and a computer-readable storage medium. Background Art

[0002] Braking emission particles are typical non-exhaust particles in road traffic sources, that is, particles generated by the wear of mutually contacting components. During the braking process of a motor vehicle, the friction between the pad or lining and the tire assembly will lead to the release of wear particles. There is evidence that the non-exhaust particles generated by road transportation mainly come from the brake wear of the vehicle (wheel wear, tire wear) and the resuspension of dust. In fact, the particles generated by braking emissions only account for a very small part of the total emission of traffic particles. It has been reported that brake wear, exhaust emissions and resuspension account for 21%, 41% and 38% of the total mass of traffic particles, respectively. However, compared with motor vehicle exhaust particles, braking emission particles show strong magnetic characteristics. The ferromagnetic content of brake wear particles is much higher than that of other sources. The saturated isothermal residual magnetization (SIRM) of brake wear-derived particles is 1-2 orders of magnitude larger than that of particles derived from other sources, and is considered to be the main contributor to magnetic particles generated during transportation. In addition, tire particles generated by brake wear have been proven to have strong biological toxicity. During the braking process, some of the wear-released particles will be adsorbed on vehicle components, while the vast majority will be released into the environment, where they settle and rise with the airflow, eventually becoming particles in the air, which can have an impact on human health. Therefore, it is very necessary to conduct in-depth research on the process and mechanism of brake wear emission particles.

[0003] The inventors of this application found in their research that road tests and brake wear simulations are the most commonly used methods for testing the formation of wear particles. However, road tests cannot accurately trace the conditions for the generation of particles and will introduce more interference factors; conventional brake simulations are carried out in motor vehicle inspection workshops. Although they can simulate a variety of braking processes, it is difficult to collect particles in different braking processes in real time. At the same time, the complex workshop environment may cause misjudgment of the source of particles. Summary of the invention

[0004] The embodiment of the present application provides a real-time collection device for brake particles. The purpose is to address the deficiencies of the prior art and provide a device for simulating and collecting brake wear particles in a closed environment, which can effectively avoid the interference of the complex workshop environment on the judgment of the source of particles.

[0005] In order to solve the above technical problems, the technical solution proposed in this application is:

[0006] A real-time collection device for brake particulate matter, comprising:

[0007] A braking simulation closed chamber, and a rotating component, a braking component and a particle collection system arranged inside the braking simulation closed chamber;

[0008] A partition plate is provided in the brake simulation closed chamber, wherein the rotating parts and the brake parts are placed on the upper part of the partition plate; and the particle collection system is placed on the lower part of the partition plate;

[0009] The rotating component includes a wheel hub and a first motor, the wheel hub is placed in the middle of the partition plate, and the left side of the wheel hub is drivably connected to the first motor via a connecting shaft;

[0010] The brake component is located on the right side of the wheel hub, and includes a second motor, a brake mechanism and a brake mechanism, wherein the second motor is drivingly connected to the brake mechanism, the brake mechanism is connected to the front end of the brake mechanism, and the second motor can drive the brake mechanism toward or away from the wheel hub.

[0011] Preferably, a control panel is provided on the outer wall of the brake simulation closed chamber, and the control panel is electrically connected to the first motor and the second motor through a circuit module.

[0012] Preferably, the braking mechanism is a brake pad, and the brake pad can be in contact with or separated from the wheel hub.

[0013] Preferably, the first motor and the second motor are preset with a plurality of gears with different power, and the circuit module controls the switching of the above gears, the wheel hub speed, and the contact time between the brake pad and the wheel hub, simulating high-speed emergency braking, high-speed point braking, low-speed emergency braking, and low-speed point braking braking modes.

[0014] Preferably, the braking mechanism is a road simulator, and the road simulator can contact or separate from the tire on the wheel hub.

[0015] Preferably, the particle collection system comprises a multi-diameter cutting head and a collection bin. The multi-diameter cutting head passes through the bottom of the partition plate, is sealed on all sides, and is arranged under the wheel hub to collect particles generated during the braking process.

[0016] Preferably, the road simulator is a cement block, and a nut adapted to the brake mechanism and the second motor drive shaft is custom-installed in the middle part of the cement block. The cement block is controlled by the control panel to approach and fit the tire to simulate the tire friction process during braking.

[0017] Preferably, a cleaning mechanism is also included, which includes an ethanol cleaning device and a sampler operation control for removing residual particles inside the brake simulation closed chamber before sampling.

[0018] On the other hand, the present application also claims a method for collecting brake particulate matter in real time using the aforementioned brake particulate matter real-time collection device, comprising the following steps:

[0019] a) installing the wheel hub onto the connecting shaft of the first motor in a simulated driving state, and controlling the speed of the first motor through a control panel to simulate the driving process of the car;

[0020] b) controlling the second motor through the control panel to make the brake pad approach and fit the wheel hub, and controlling the contact degree, time and repeated fit between the brake pad and the wheel hub through the program to simulate the braking process of emergency braking, slow braking or point braking;

[0021] c) Start the particle collection system in a closed environment to collect all particles generated by the friction between the brake pad and the wheel hub during braking in real time, eliminating interference from other atmospheric particles;

[0022] d) Install the tire on the wheel hub, remove the brake pad and replace it with a cement block, and use the motor to push the cement block to contact the tire to simulate the tire wear process;

[0023] e) Also in a closed environment, a particle collection system is used to collect all tire wear particles generated by the friction between the tire and the cement block in real time.

[0024] On the other hand, the present application also requests protection for an electronic device, comprising: a processor; a memory for storing instructions executable by the processor; the memory stores program code for the method for real-time collection of brake particulate matter.

[0025] On the other hand, the present application also requests protection for a computer-readable storage medium having program code stored thereon, and when the program code is executed by a processor, the method for real-time collection of brake particulate matter is implemented.

[0026] Compared with the prior art, the real-time collection device for brake particles of the present invention has achieved the following beneficial technical effects:

[0027] The real-time brake particle collection device of the present invention is a separate system. The simulation process does not need to be carried out on the car, and the overall cost is low. The structure is simple, easy to install and debug, and can simulate a variety of braking processes. At the same time, the system integrates the brake mechanism, friction components and particle collection system in the same closed space. The braking process and the collection process are carried out simultaneously, ensuring the real-time collection of all particles and avoiding environmental interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic structural diagram of a real-time collection device for brake particulate matter provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figure 1 As shown, the real-time collection device of brake particulate matter in the embodiment of the present application includes a brake simulation closed chamber 10, a rotating component, a brake component and a particulate matter collection system 4;

[0032] A partition plate is provided in the brake simulation closed chamber 10, wherein the rotating components and the brake components are placed on the upper part of the partition plate; and the particle collection system is placed on the lower part of the partition plate;

[0033] The rotating component includes a wheel hub 1 and a first motor 2, which are used to simulate the rotation of the vehicle wheel; the brake component is used to take braking measures on the wheel hub 1 to simulate the braking process. The control panel 6 is arranged outside the braking simulation closed chamber for experimental personnel to operate, including daily operations such as starting, stopping, and mode selection. A partition plate 7 is arranged in the braking simulation closed chamber 10, and the wheel hub 1, the first motor 2, the brake component and the brake pad 5 are placed on the upper part of the partition plate 7 of the braking simulation closed chamber 10, and the particle collection system 4 is placed on the lower part of the partition plate 7. The wheel hub 1 is placed in the middle of the partition plate 7, and the left side of the wheel hub 1 is connected to the first motor 2 through a connecting shaft, so that the first motor 2 can drive the wheel hub 1 to rotate. The brake component 3 is located on the right side of the wheel hub 1, including a second motor 8, a brake mechanism 9 and a brake pad 5, wherein the second motor 8 is drivingly connected to the brake mechanism 9, and the brake pad 5 is connected to the front end of the brake mechanism 9, so that under the driving action of the second motor 8, the brake mechanism 9 can control the brake pad 5 to contact with the wheel hub 1 to simulate the braking process. After the braking process is completed, the second motor 8 can control the brake pad 5 to withdraw, thereby releasing the braking state.

[0034] The particle collection system 4 includes a multi-diameter cutting head 3 and a collection bin. The multi-diameter cutting head 3 passes through the bottom of the partition plate 7 and is sealed on all sides. It is arranged under the wheel hub 1 to collect particles generated during the braking process.

[0035] The brake simulation closed chamber 10 of the present application is provided with a control panel 6, which is electrically connected to the first motor 2 and the second motor 8 through a circuit module and can control the driving mode of the motor.

[0036] During the experiment, the first motor 2 rotates, thereby driving the wheel hub 1 to rotate to simulate the vehicle's forward movement. The second motor 8 drives the brake mechanism 9 and the brake pad 5 to brake the wheel hub 1 to simulate the braking process. Preferably, the first motor 2 and the second motor 8 have a variety of adjustable power gears, which can provide different driving forces, so that the present application can control the wheel hub speed and the contact time between the brake pad and the wheel hub through the circuit module, and simulate a variety of braking modes including high-speed emergency braking, high-speed point braking, low-speed emergency braking, and low-speed point braking, so as to simulate the actual braking situation to the greatest extent.

[0037] The wheel hub speed and the contact time between the brake pad and the wheel hub are controlled by the circuit module to simulate various braking modes including high-speed emergency braking, high-speed point braking, low-speed emergency braking, and low-speed point braking, simulating the actual braking situation to the greatest extent. This application uses a built-in particle collection system 4, which can collect wear particles generated under different braking conditions. In order to ensure that the sampling process is not affected by external conditions, the entire braking process is carried out in a closed space. Each time the braking conditions are changed, ethanol is used to clean the interior of the space, and the built-in sampler is run to remove the remaining particles to avoid interference. The atmospheric particulate sampler has a built-in multi-particle cutting head that can collect and distinguish particles of multiple particle sizes such as PM10, PM2.5, and PM1. On the basis of distinguishing different braking conditions, the separation of brake particles of different particle sizes is further realized. High-precision chemical analysis methods are used to perform qualitative and quantitative analysis on all collected particulate matter.

[0038] The specific steps of the adoption method of this application are as follows:

[0039] 1) Install the wheel hub to the specific position of the connecting shaft of the motor 3 and fix it with a customized nut. Use the buttons on the control panel to control the rotation of the motor to simulate the rotation process of the wheel hub while the car is driving.

[0040] 2) The control panel controls the transmission shaft of the motor 4 to push the brake pads close to and fit the wheel hub. The program can accurately control the degree of the brake pads fitting the wheel hub (the step can be controlled to 1 cm), the time of fitting the wheel hub (the time can be 1 second), and the repeated fitting of the wheel hub, thereby simulating various processes such as emergency braking, slow braking, and point braking.

[0041] 3) At the same time, the particle collection system 5 is turned on to collect particles generated by the friction between the brake pad and the wheel hub during the braking process in real time. At the same time, since the process is carried out in a closed environment of the simulation system for real-time collection, interference from other atmospheric particles can be eliminated.

[0042] 4) After cleaning the confined space, put the tire on the wheel hub, remove and replace the brake pad with a cement block. The middle part of the cement block can be customized to install a nut that fits the motor drive shaft. The control panel controls the drive shaft of the motor 4 to push the cement block close to and fit the tire, simulating the tire friction process during braking.

[0043] 5) Turn on the particle collection system 5 to collect particles generated by the friction between the tire and the cement sheet during braking in real time.

[0044] 6) Conduct high-precision chemical analysis on the wheel friction particles and tire friction particles collected separately.

[0045] Those skilled in the art know that the tire wear caused by braking is different at different rotation speeds. Currently, there is no relevant research on the specific conditions of tire wear particles under different braking conditions. The device of the present invention simulates the tire wear process alone, eliminates the interference that may be introduced by other processes, and collects all tire wear particles generated by braking in real time, and distinguishes the particles generated by different braking processes.

[0046] When the brake pad temperature is below 200°C, the abrasion process is dominant and mainly produces wear particles >1μm. However, at higher temperatures (>190°C), the concentration of nanoparticles increases due to evaporation, condensation and aggregation processes, and high-concentration magnetite nanoparticles are emitted. At 160 to 190°C, the emission rate of magnetite nanoparticles increases by 4-6 orders of magnitude. Different braking conditions will result in different temperatures and pressures, so the released wear particles will also have obvious differences in morphology and structure. The present invention can collect all particles generated by braking in real time and distinguish particles generated by different braking processes. It lays the foundation for the accurate quantification and qualitative analysis of brake particles.

[0047] Those skilled in the art know that the tire wear caused by braking is different at different speeds. Currently, there is no relevant research on the specific conditions of tire wear particles under different braking conditions. The device of the present invention simulates the tire wear process alone, eliminates the interference that may be introduced by other processes, and collects all tire wear particles generated by braking in real time, and distinguishes particles generated by different braking processes. The device of the present invention lays a technical foundation for accurately identifying tire particles.

[0048] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A real-time collection device for brake particulate matter, characterized in that: include: A braking simulation closed chamber (10), and a rotating component, a braking component and a particle collection system (4) arranged inside the braking simulation closed chamber (10); A partition plate (7) is provided in the braking simulation closed chamber (10), wherein the rotating component and the braking component (3) are placed on the upper part of the partition plate (7); and the particle collection system (4) is placed on the lower part of the partition plate (7); The rotating component comprises a wheel hub (1) and a first motor (2); the wheel hub (1) is placed in the middle of the partition plate (7); the left side of the wheel hub (1) is drivably connected to the first motor (2) via a connecting shaft; The brake component is located on the right side of the wheel hub (1), and comprises a second motor (8), a brake mechanism (9) and a brake mechanism (5), wherein the second motor (8) is drivingly connected to the brake mechanism (9), the brake mechanism (5) is connected to the front end of the brake mechanism (9), and the second motor (8) can drive the brake mechanism (9) to move toward or away from the wheel hub (1).

2. The real-time collection device for brake particles according to claim 1 is characterized in that: The outer wall of the brake simulation closed chamber (10) is provided with a control panel (6), and the control panel (6) is electrically connected to the first motor (2) and the second motor (8) via a circuit module.

3. The real-time collection device for brake particles according to claim 1 is characterized in that: The braking mechanism (5) is a brake pad, and the brake pad can be in contact with or separated from the wheel hub (1).

4. The real-time collection device for brake particles according to claim 3 is characterized in that: The first motor (2) and the second motor (8) are both preset with a plurality of gears of different powers, and the circuit module controls the switching of the gears, the rotation speed of the wheel hub (1), and the contact time between the brake pad and the wheel hub (1), simulating high-speed emergency braking, high-speed point braking, low-speed emergency braking, and low-speed point braking braking modes.

5. The real-time collection device for brake particles according to claim 2 is characterized in that: The braking mechanism (5) is a road surface simulator, and the road surface simulator can contact or separate from the tire on the wheel hub (1).

6. The real-time collection device for brake particles according to claim 1, characterized in that: The particle collection system (4) comprises a multi-diameter cutting head (3) and a collection bin. The multi-diameter cutting head (3) passes through the bottom of the partition plate (7), is sealed on all sides, and is arranged below the wheel hub (1) to collect particles generated during the braking process.

7. The real-time collection device for brake particles according to claim 5, characterized in that: The road simulator is a cement block, and a nut adapted to the brake mechanism (9) and the transmission shaft of the second motor (8) is custom-installed in the middle of the cement block. The cement block is controlled by the control panel (6) to approach and fit the tire, simulating the tire friction process during braking.

8. The real-time collection device for brake particles according to claim 1, characterized in that: It also includes a cleaning mechanism, which includes an ethanol cleaning device and a sampler operation control, and is used to remove residual particles inside the brake simulation closed chamber (10) before sampling.

9. A method for collecting brake particulate matter in real time using the brake particulate matter real-time collection device according to claim 1, characterized in that: The following steps are involved: a) installing the wheel hub onto the connecting shaft of the first motor in a simulated driving state, and controlling the speed of the first motor through a control panel to simulate the driving process of the car; b) controlling the second motor through the control panel to make the brake pad approach and fit the wheel hub, and controlling the contact degree, time and repeated fit between the brake pad and the wheel hub through the program to simulate the braking process of emergency braking, slow braking or point braking; c) Start the particle collection system in a closed environment to collect all particles generated by the friction between the brake pad and the wheel hub during braking in real time, eliminating interference from other atmospheric particles; d) Install the tire on the wheel hub, remove the brake pad and replace it with a cement block, and use the motor to push the cement block to contact the tire to simulate the tire wear process; e) Also in a closed environment, a particle collection system is used to collect all tire wear particles generated by the friction between the tire and the cement block in real time.

10. An electronic device, characterized in that: include: processor; A memory for storing instructions executable by a processor; the memory stores program code for the method for real-time collection of brake particulate matter as described in claim 9.

11. A computer-readable storage medium, characterized in that: The storage medium stores program code, and when the program code is executed by the processor, the method for collecting brake particulate matter in real time as claimed in claim 9 is implemented.

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