A device for detecting particulate matter

Abstract

The application discloses a device for detecting the number of particulate matters, which comprises a collecting device arranged on a roadbed and used for collecting exhaust gas of diesel vehicles, the collecting device is used for collecting the exhaust gas of the passing diesel vehicles; a diesel particulate filter arranged in the roadbed and used for filtering the exhaust gas; a license plate collector arranged on a portal frame, the collector is used for collecting the license plate of the passing vehicles; a controller arranged on one side of the portal frame, the controller is internally provided with an electric control system; the controller is electrically connected with the license plate collector and the collecting device, the controller controls the starting of the collecting device according to the type of the passing vehicles by judging the license plate of the vehicles; the license plate collector faces the direction of the vehicle travel, and the collecting device is located on the side of the license plate collector away from the direction of the vehicle travel. The device has the effects of collecting the exhaust gas for analysis and reducing the influence of external factors.

Description

Technical Field

[0001] This invention relates to the field of exhaust gas detection, and in particular to a device for detecting particulate matter number. Background Technology

[0002] Compared to gasoline engines, diesel engines have lower fuel consumption and higher power, making them widely used in automobiles due to their excellent power, economy, and durability. However, their particulate matter emissions are 30 to 50 times higher than those of gasoline engines. This means that heavy-duty diesel vehicles, which account for only 3.66% of all motor vehicles, account for 90% of total vehicle particulate matter emissions. Diesel engines can also cause chronic lung diseases, and more than 90% of the components on the surface of exhaust particles are carcinogenic. Therefore, controlling diesel engine particulate matter emissions is extremely important.

[0003] Many current devices for detecting diesel vehicle exhaust emissions are all-road vehicle exhaust emission remote sensing monitoring systems. They use a radiation source to reflect light through a mirror to a detector to detect the spectral information in the reflected light. However, this detection method is easily affected by external factors. Summary of the Invention

[0004] This application provides a particulate matter number detection device, which adopts the following technical solution: A device for detecting particulate matter number, comprising: A collection device installed on the roadbed to collect diesel vehicle exhaust. The collection device collects the exhaust of passing diesel vehicles in a targeted manner. A diesel particulate filter installed inside the roadbed to filter exhaust gas. A license plate collector is installed on the gantry; the collector is used to collect the license plates of passing vehicles. The controller is located on one side of the gantry, and the controller has an internal electrical control system; The controller is electrically connected to the license plate collector and collection device. The controller determines the type of vehicle that is about to pass based on the vehicle's license plate and controls the start of the collection device. The license plate collector faces the direction of vehicle travel, while the collection device is located on the side of the license plate collector away from the direction of vehicle travel.

[0005] By adopting the above technical solution, the exhaust gas from diesel vehicles can be collected. Instead of using the currently common remote sensing method, this method precisely collects and analyzes the exhaust gas, making the detection results more accurate and reducing the impact of the external environment on the accuracy of the detection.

[0006] Optionally, the collecting device includes a housing and a collecting component disposed inside the housing, the collecting component being a component capable of generating negative pressure; An air inlet is provided on the side of the outer casing closest to the road surface. The collection component can create negative pressure at the air inlet to generate suction and draw in the exhaust gas.

[0007] By adopting the above technical solution, the generated negative pressure can be used to better collect exhaust gas, and the collector can be placed close to the road surface to improve the accuracy of collection.

[0008] Optionally, the end of the air inlet closest to the road surface is rectangular, and the edge of the air inlet is chamfered, so that the end of the air inlet closest to the road surface forms a horn shape.

[0009] By adopting the above technical solution and changing the shape of the air inlet to form a horn shape, the negative pressure can be indirectly increased, which can better collect the exhaust gas.

[0010] Optionally, the end of the air inlet near the collection component is circular, and the connection between the circular part and the rectangle is provided with rounded corners.

[0011] By adopting the above technical solution and using negative pressure channels with different shapes and diameters, a greater negative pressure can be generated under the same wind force, thereby improving the collection of exhaust gas.

[0012] Optionally, the housing is provided with a shield near the air inlet, and a drive assembly is provided inside the housing; The shield can block the air intake in heavy rain to prevent rainwater from entering. The driving component is used to drive the closing or opening of the blocking component.

[0013] By adopting the above technical solution, the shielding component can automatically seal the air inlet on rainy days to prevent rainwater from entering and causing damage to the collection component, thereby improving the service life of the collector.

[0014] Optionally, the housing is provided with a shield near the air inlet, and a drive assembly is provided inside the housing; The shield can block the air intake in heavy rain to prevent rainwater from entering. The driving component is used to drive the closing or opening of the blocking component.

[0015] By adopting the above technical solution, the presence of the counterweight, in conjunction with the drive component, enables the end of the shield to descend more effectively, reducing the probability of wrinkles occurring during operation, thereby allowing the shield to better block the air intake.

[0016] Optionally, both ends of the counterweight are provided with guide posts fixed to the end face of the outer shell, and a guide groove is provided on the side of the guide post near the counterweight. A guide block that can slide in the guide groove is fixedly connected to the end face of the counterweight.

[0017] By adopting the above technical solution, the movement trajectory of the end of the shield can be restricted, reducing its susceptibility to external factors and preventing the shield from effectively blocking the air intake.

[0018] Optionally, the drive assembly includes a water storage tank and a drive block disposed inside the water storage tank. The drive block is hollow inside, and a shielding cloth extends to the end of the housing and connects to the drive block. The drive block has multiple receiving grooves on its lower surface and multiple overflow grooves on its upper surface. The overflow grooves and receiving grooves extend perpendicularly, and the sum of the depths of the overflow grooves and receiving grooves is equal to the thickness of the drive block.

[0019] By adopting the above technical solution, the combination of the overflow trough and the receiving trough can better envelop the incoming rainwater, thereby making the drive block more sensitive to buoyancy feedback, and thus enabling the drive block to better drive the shielding component to shield the air inlet.

[0020] Optionally, the water tank has an outlet on its side wall, which is located near the bottom of the water tank, and a baffle is inserted into the side wall of the water tank, the lower end of which can block the outlet. The upper end of the baffle is fixedly connected to a protrusion that can penetrate deep into the water tank. After the drive block floats up to a certain height, it will contact the protrusion.

[0021] By adopting the above technical solution, when there is enough rainwater in the water tank, the drive block can automatically drive the baffle to rise, so that the rainwater can be discharged and the overflow of rainwater can be avoided.

[0022] In summary, This application enables direct collection of exhaust gases without using telemetry technology, thus mitigating the impact of external environmental factors on the detection results. Furthermore, when used in conjunction with a license plate collector, it can accurately collect exhaust gases from diesel vehicles without collecting exhaust gases from other vehicles, thereby avoiding the monitoring of exhaust gases from heavy-duty diesel vehicles. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall composition in the embodiment.

[0024] Figure 2 This is a schematic diagram of the collector in the embodiment.

[0025] Figure 3 This is a cross-sectional view highlighting the collection component in the embodiment.

[0026] Figure 4 yes Figure 3 Enlarged view of section A in the middle; Figure 5 This is a cross-sectional view highlighting the driving component in the embodiment.

[0027] Explanation of reference numerals in the attached figures: 1. Collector; 11. Housing; 12. Air inlet; 121. Chamfer; 123. Rounded corner; 13. Fixing plate; 14. Partition plate; 15. Water tank; 151. Water outlet; 152. Baffle; 153. Protrusion; 154. Horizontal plate; 16. Water inlet; 2. Diesel particulate filter; 3. Controller; 4. Gantry frame; 5. License plate collector; 6. Collection assembly; 7. Obstruction assembly; 71. Counterweight; 72. Guide column; 73. Guide groove; 74. Guide block; 8. Drive assembly; 81. Drive block; 82. Receiving groove; 83. Overflow groove. Detailed Implementation

[0028] This application discloses a device for detecting particulate matter number. (Refer to...) Figure 1 The particulate matter number detection device includes a collector 1 arranged on the roadbed and a diesel particulate filter 2 installed inside the roadbed. The collector 1 mainly collects the exhaust gas from passing vehicles, while the diesel particulate filter 2 mainly performs preliminary filtration of the exhaust gas to remove coarse particles and other particulate matter in the air that is mistakenly collected by the collector 1. The diesel particulate filter 2 is also connected to a diluent, a concentration detector, etc., to facilitate the detection and analysis of the filtered exhaust gas and determine whether there is a problem with excessive particulate matter.

[0029] Meanwhile, a controller 3 is installed on one side of the collector 1. The collector 1 and the license plate collector 5 installed on the gantry 4 are connected to the control box 3. The controller 3 is equipped with an electronic control system that can determine whether a vehicle is a diesel vehicle based on the license plate collected by the license plate collector 5, and control whether the collector 1 is started.

[0030] Reference Figure 2 and Figure 3 The collector 1 includes a housing 11 fixed on the roadbed and a collection component 6 located inside the housing. An air inlet 12 is provided on the side of the housing facing the road surface, and vehicle exhaust gas enters the housing 11 from the air inlet 12.

[0031] Reference Figure 2 and Figure 3 The end of the air inlet 12 closest to the road surface is rectangular, and a chamfer 121 is provided at the end of the air inlet 12. The end of the air inlet 12 closest to the collecting component 6 is circular, and a rounded corner 122 is provided at the connection between the circular part and the rectangular part. The air inlet 12 has two different shapes, rectangular and circular, which can increase the negative pressure generated, thereby better sucking in the exhaust gas. The presence of the chamfer 121 and the rounded corner 122 can reduce the interference of the plane on the suction force, making the airflow smoother and indirectly improving its suction force.

[0032] Reference Figure 2 and Figure 3 The outer shell 11 is a cuboid, and the outer shell 11 has a fixed plate 13 integrally formed on both sides perpendicular to the direction of vehicle travel. The fixed plate 13 is bolted to the ground by screws pre-embedded in the roadbed, thereby fixing the collector 1 in place.

[0033] Reference Figure 3 and Figure 4 In this application, the collection component 6 is replaced by an axial flow fan structure. When a diesel vehicle passes by, the collection component 6 is activated to absorb the exhaust gas and then send it to the diesel particulate filter 2 for treatment.

[0034] Reference Figure 3 and Figure 4 The outer casing 12 is also provided with a shield 7 and a drive assembly 8. The shield 7 is a soft shielding cloth. One end of the shield 7 is located above the air inlet 12, and the other end of the shield 7 is connected to the drive assembly 8. When there is heavy rain in the outside environment, the drive assembly 8 drives the shield 7 to shield the air inlet 12, so that rainwater cannot enter the collector 1, thereby reducing the impact of rainwater on the service life of the collector 1.

[0035] Reference Figure 3 and Figure 4 A counterweight 71 is fixedly connected to one end of the shield 7 at the air inlet 12. The presence of the counterweight 71 helps the shield 7 move and reduces the probability of the shield 7 shaking. Guide posts 72 fixed to the side wall of the air inlet 12 are provided at both ends of the counterweight 71 along its length. A guide groove 73 is opened on the side of the guide post 72 near the counterweight 71. A guide block 74 that can slide in the guide groove 73 is fixedly connected to the end face of the counterweight 71. The guide groove 73 can restrict the movement trajectory of the counterweight 71 through the guide block 74. Since the guide post 72 is fixed to the side wall of the outer shell 11, it can restrict the shield 7, so that the soft shield 7 can block the air inlet 12 as much as possible.

[0036] Reference Figure 3 and Figure 4A partition 14 is fixedly connected inside the outer shell 11, dividing the interior of the outer shell 11 into two parts: the front part is used to accommodate the collection component 6, and the rear part is a water tank 15 for accommodating rainwater. The drive component 8 is a drive block 81 located inside the water tank 15, and the drive block 81 is hollow inside. The end of the shield 7 away from the counterweight 71 extends from the top of the outer shell 11 into the water tank 15 and is fixedly connected to the drive block 81. The drive block 81 itself has a certain weight. In sunny weather, the drive block 81 is located at the bottom of the water tank 15, applying a pulling force to the shield 7, so that the shield 7 is in a raised state at the end of the air inlet 12. When it rains, rainwater enters the water tank 15. When there is enough rainwater, the drive block 81 is lifted by buoyancy and no longer applies a pulling force to the shield 7. Then the counterweight 71 drives the shield 7 to descend, blocking the air inlet 12 and preventing rainwater from entering.

[0037] Reference Figure 3 and Figure 5 The outer casing 11 has a water inlet 16 on its top, which is connected to the water tank 15 to facilitate the entry of rainwater. A filter screen can be optionally installed at the water inlet 16 to prevent external debris from entering the water tank 15.

[0038] Reference Figure 5 The water tank 15 has an outlet 151 on the side wall of the outer shell 11 facing away from the collection component 6. A baffle 152 is provided inside the side wall at the outlet 151. The baffle 152 can close the outlet 151 and can move up and down inside the side wall. Under normal conditions, the baffle 152 closes the outlet 151, preventing rainwater from flowing out. When there is enough water in the water tank 15, the baffle 152 moves upward, the outlet 151 opens, and the rainwater flows out, preventing the rainwater in the water tank 15 from overflowing from the inlet 16. If the rain is too heavy, because the size of the outlet 151 is limited, it will maintain a sufficient amount of water in the water tank 15, and the drive block 81 will also float above the water tank 15. If the rainfall is not heavy, the rainwater will not affect the collection component 6, so the drive block 81 descends, and the shield 7 does not completely block the air inlet 12, so it will not have any impact.

[0039] Reference Figure 5 A protrusion 153 is fixedly connected to the upper side wall of the baffle 152. The protrusion 153 protrudes from the inner wall of the water tank 15. After the drive block 81 floats up to a certain distance, the upper surface of the drive block 81 will fit against the lower surface of the protrusion 153. If the drive block 81 continues to float up, it will drive the baffle 152 to move upward. Magnets (not shown in the figure) are provided at the upper end of the baffle 152 and the top surface of the water tank 15. After the baffle 152 rises, under the action of the magnet, the baffle 152 will be attracted to the top surface of the water tank 15. When the drive block 81 falls back due to the drop in the rainwater level, the baffle 152 will not fall, thus not affecting the drainage of rainwater.

[0040] Reference Figure 5 A horizontal plate 154 is fixedly connected to the lower side wall of the baffle 152. The end of the horizontal plate 154 away from the baffle 152 is below the drive block 81. When the drive block 81 touches the bottom of the water tank, it means that the water in the water tank 15 is immediately drained. At this time, the drive block will also apply pressure to the horizontal plate 154, thereby driving the baffle 152 to descend and complete the sealing of the outlet 151. Since the horizontal plate 154 is below the drive block 81, it will not affect the rise of the drive block 81. At the same time, the initial rise of the drive block 81 will not drive the baffle 152 to rise, thereby preventing the rainwater in the water tank 15 from flowing out too early.

[0041] Reference Figure 5 The lower surface of the drive block 81 is provided with multiple receiving grooves 82, which can hold rainwater, thereby increasing the volume of the drive block 81 in contact with the rainwater, increasing the buoyancy of the drive block 81, and enabling the drive block 81 to respond to the buoyancy it receives more quickly, so that the drive block 81 floats up as the rainwater increases.

[0042] The upper surface of the drive block 81 is provided with multiple overflow grooves 83. The extension direction of the overflow grooves 83 is perpendicular to the extension direction of the receiving groove 82. The depth direction of the overflow grooves 83 extends downward and the depth direction of the receiving groove 82 extends upward. The sum of the depths of the overflow grooves 83 and the receiving groove 82 is equal to the thickness of the drive block 81. Therefore, the intersection of the overflow grooves 83 and the receiving groove 82 is a through hole, which facilitates the rainwater entering the water tank 15 to enter the receiving groove 82, so that the rainwater can be accumulated from the bottom of the drive block 81, making the movement block 81 more responsive.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for detecting particulate matter number, characterized in that: include: A collection device installed on the roadbed to collect diesel vehicle exhaust. The collection device collects the exhaust of passing diesel vehicles in a targeted manner. A diesel particulate filter installed inside the roadbed to filter exhaust gas. A license plate collector is installed on the gantry; the collector is used to collect the license plates of passing vehicles. The controller is located on one side of the gantry, and the controller has an internal electrical control system; The controller is electrically connected to the license plate collector and collection device. The controller determines the type of vehicle that is about to pass based on the vehicle's license plate and controls the start of the collection device. The license plate collector faces the direction of vehicle travel, while the collection device is located on the side of the license plate collector away from the direction of vehicle travel.

2. The device for detecting particulate matter number according to claim 1, characterized in that: The collecting device includes a housing and a collecting component disposed inside the housing, the collecting component being a component capable of generating negative pressure; An air inlet is provided on the side of the outer casing closest to the road surface. The collection component can create negative pressure at the air inlet to generate suction and draw in the exhaust gas.

3. The device for detecting particulate matter number according to claim 2, characterized in that: The air intake is rectangular at the end closest to the road surface, and the edges of the air intake are chamfered, making the end of the air intake closest to the road surface into a horn shape.

4. The device for detecting particulate matter number according to claim 3, characterized in that: The air inlet is circular at the end near the collection component, and the connection between the circular part and the rectangle has rounded corners.

5. The device for detecting particulate matter number according to claim 1, characterized in that: The outer casing is provided with a shield near the air inlet, and a drive assembly is provided inside the outer casing; The shield can block the air intake in heavy rain to prevent rainwater from entering. The driving component is used to drive the closing or opening of the blocking component.

6. The device for detecting particulate matter number according to claim 1, characterized in that: The shielding component is a soft shielding cloth, with one end of the shielding cloth positioned above the air inlet, and the other end of the shielding cloth extending from the upper surface of the housing and into the housing to connect with the drive assembly. A counterweight is fixedly connected to the lower end of the shielding cloth.

7. The device for detecting particulate matter number according to claim 6, characterized in that: Both ends of the counterweight are provided with guide posts fixed to the end face of the outer shell. A guide groove is opened on the side of the guide post near the counterweight. A guide block that can slide in the guide groove is fixedly connected to the end face of the counterweight.

8. The device for detecting particulate matter number according to claim 5, characterized in that: The drive assembly includes a water storage tank and a drive block disposed inside the water storage tank. The drive block is hollow inside, and a shielding cloth extends to the end of the housing and connects to the drive block. The drive block has multiple receiving grooves on its lower surface and multiple overflow grooves on its upper surface. The overflow grooves and receiving grooves extend perpendicularly, and the sum of the depths of the overflow grooves and receiving grooves is equal to the thickness of the drive block.

9. The device for detecting particulate matter number according to claim 1, characterized in that: The water tank has an outlet on its side wall, which is located near the bottom of the water tank. A baffle is inserted inside the side wall of the water tank, and the lower end of the baffle can block the outlet. The upper end of the baffle is fixedly connected to a protrusion that can penetrate deep into the water tank. After the drive block floats up to a certain height, it will contact the protrusion.

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