A method and system for detecting road dust load

Abstract

The present invention belongs to the technical field of road dust load detection, and specifically relates to a road dust load detection method and system. Specifically, it includes a dust collection and weighing device for weighing collected dust, a lifting dust suction device disposed on the bottom of a vehicle for collecting road dust, and a controller. The controller controls the lifting dust suction device to collect dust within a set area into the dust collection and weighing device, controls the dust collection and weighing device to weigh the collected dust, extracts the weighing results, and calculates the road dust load. By directly sucking the dust within the set area and combining it with the direct weighing process, the obtained weighing data is a real-time and accurate value, thereby improving the accuracy of the calculated road dust load value.

Description

Technical Field

[0001] The present invention belongs to the technical field of road dust load detection, and in particular relates to a road dust load detection method and system. Background Art

[0002] Road dust load is a physical quantity used to monitor dust accumulation on roads. It is an important indicator for measuring road dust emissions and is measured in grams per square meter. It measures the amount of dust particles smaller than 75 microns per unit area that can be lifted from the road surface during normal vehicle movement, reflecting the potential for road dust generation.

[0003] Traditional methods for measuring road dust load rely on a series of manual operations. Specifically, a sample area, such as a section of street, is selected. A one-square-meter wooden frame is placed on the ground to mark the collection area. Workers then use a small brush and bucket to collect dust within the collection area. After collecting the dust within the frame as thoroughly and completely as possible, they use an electronic scale or other measuring tool to measure the weight of the collected dust and calculate the road dust load. This manual testing process is inefficient and labor-intensive, and its accuracy relies heavily on the operator's meticulousness.

[0004] Due to the inefficiency of manual detection and the uncertainty of data accuracy, existing technologies have developed cruise-based road dust detection solutions, such as those disclosed in Chinese patent publications CN113514373A, CN114264584A, and CN214894715U. These solutions primarily measure the concentration of dust raised by vehicles on the road and then use a pre-calibrated model to reflect the road surface dust load. Since road surface dust load refers to the weight of dust raised within a square meter, cruise-based detection, which relies on actual dust raised to reflect the road surface dust load, clearly cannot guarantee accurate results.

[0005] As another improvement in monitoring road dust load, Chinese invention patent publication number CN113607617A discloses a device for rapidly detecting road dust emission factors. This device collects samples of dust from the road and then measures the amount of dust to monitor accumulated dust load. This solution addresses the issue of low accuracy in determining accumulated dust load based on raised dust, but its specific detection method, as described in paragraph 28 of its specification, is based on the principle that dust particles dissipate light, deriving the amount of accumulated dust from the intensity of scattered light. This still presents difficulties in accurately measuring the amount of dust accumulated within a given area. The Chinese invention patent publication document with publication number CN111044423A discloses a portable road dust load monitoring device, which covers a set monitoring area by traveling at a set speed, but still measures dust accumulation through various particulate matter sensors, laser dust sensors, etc. However, the road dust concentration monitored based on the laser scattering principle of the laser sensor is essentially a road dust concentration obtained based on empirical values, and there is no unified standard to determine the accurate road dust load corresponding to the value detected by the laser sensor. Therefore, the existing technology still has the problem of inaccurate data. Summary of the Invention

[0006] The object of the present invention is to provide a method and system for detecting road dust load, so as to solve the problem of inaccurate data obtained during road dust load detection in the prior art.

[0007] In order to solve the above technical problems, the present invention provides a road dust load detection system, comprising a dust collection and weighing device for weighing collected dust, a lifting dust suction device arranged on the bottom of a vehicle for collecting road dust, and a controller, the lifting dust suction device comprising a collection frame for framing a dust collection area and a dust suction head that can move freely in the collection frame; the dust collection and weighing device comprises an upstream interface for connecting to an upstream dust collector and a downstream interface for connecting to the dust suction head, the upstream interface and the downstream interface are connected by a collecting device, an air flow channel is formed between the upstream interface and the downstream interface, a collection bag for collecting dust is provided on the air flow channel, the collection bag allows air flow to pass but filters out dust particles of a set size; the dust collection and weighing device also comprises a weighing device for weighing the collection bag; the controller is used to execute instructions to implement the following steps of the road dust load detection method:

[0008] 1) Controlling the lifting dust collecting device to descend until the collection frame contacts the ground;

[0009] 2) Controlling the vacuum head to move within the collection frame to collect dust, with the moving dust collection path covering the entire dust collection area; airflow carrying dust from the collection frame passes through the collection bag, which filters and collects the dust in the collection bag;

[0010] 3) controlling the weighing device to weigh the collecting device and obtain the road dust load;

[0011] 4) Control the lifting dust collecting device to rise off the ground.

[0012] In addition, the present invention also provides a method for detecting road surface dust load, which includes the steps of the method for detecting road surface dust load in the above-mentioned road surface dust load detection system.

[0013] The beneficial effects are as follows: the controller controls the lifting dust suction device to collect dust in the collection area and transfer it to the dust collection weighing device for weighing. The obtained weighing data is the weight of the dust in the specified area directly obtained. The collection frame contacts the ground to form a closed collection area. The area of ​​the dust collection area is accurate and will not change due to changes in suction force, preventing dust outside the collection area from entering and affecting the detection results. The collection bag allows airflow to pass but filters out dust particles of a set size. The collection bag filters the dust and collects it in the collection bag, leaving only the dust particles required for the test, preventing particles not required for the road surface dust load from being retained in the collection bag and affecting the test results. Therefore, the obtained weighing data is the accurate dust weight data required for the road surface dust load. Based on the accurate weighing data, the final obtained road surface dust load is more accurate.

[0014] Furthermore, in the above-mentioned road dust load detection method and system, the dust collection weighing device also includes a lifting system, the weighing device is arranged on the moving part of the lifting system, and the collecting device is located at the end of the moving path of the lifting system moving part during the rising process; when no weighing is performed, the lifting system moving part is lowered, and the collecting device is not in contact with the weighing surface of the weighing device; in the step 3), the method of weighing the collecting device includes controlling the lifting system moving part to rise with the weighing device so that the weighing surface of the weighing device completely lifts the collecting device, and after reading the reading of the weighing device, lowering the moving part to separate the weighing surface of the weighing device from the collecting device.

[0015] Furthermore, in the above-mentioned road dust load detection method and system, the dust collection weighing device also includes a lifting system, the collecting device is arranged on the moving part of the lifting system, and the weighing surface of the weighing device is located at the end of the moving path of the lifting system moving part during the descending process; when no weighing is performed, the lifting system moving part rises, and the collecting device is not in contact with the weighing surface of the weighing device; in the step 3), the method of weighing the collecting device includes controlling the lifting system moving part to descend with the collecting device, so that the collecting device is placed on the weighing surface of the weighing device, and after reading the reading of the weighing device, the moving part is raised to separate the weighing surface of the weighing device from the collection bag.

[0016] By separating the weighing device from the collecting device, and making the weighing surface of the weighing device contact the collecting device only when weighing is in operation, and making the weighing surface of the weighing device completely lift the collecting device to reach the optimal weighing position for weighing, it is avoided that the road is bumpy during driving of the vehicle, so that the weighing device is kept in the weighing state and the data is constantly changing, resulting in a decrease in the accuracy of the weighing device, thereby improving the accuracy of the weighing data and increasing the service life of the weighing device.

[0017] Furthermore, the above-mentioned road dust load detection method and system further includes, before step 2), a step of zeroing the weighing device. The collection device is controlled to descend until it rests on the weighing surface of the weighing device. The weighing device then weighs the unfiltered dust collection device. After weighing is complete, the collection device is controlled to ascend until it is separated from the weighing surface of the weighing device. This process, i.e., zeroing the weighing device before dust collection, prevents the detection data from being affected by the presence of irremovable media in the collection bag after long-term use, thereby improving the accuracy of the ultimately obtained road dust load.

[0018] Furthermore, in the above-mentioned road dust load detection method and system, in step 2) of the road dust load detection method, the dust collector head is controlled to move along a spiral trajectory. Relatively speaking, the spiral trajectory more closely simulates the action of manually sweeping dust, effectively sweeping up road dust while preventing dust from bouncing away, thereby completely collecting dust within the collection frame and improving the accuracy of the final road dust load measurement.

[0019] Furthermore, the above-mentioned road dust load detection method and system further includes a distance meter for detecting the distance from the road shoulder. Prior to step 1), the distance between the current position and the road shoulder is measured using the distance meter. Subsequent steps are performed only when the distance reaches a set value; otherwise, a warning is output. The distance meter accurately determines whether the detection position is within the standard detection position for road dust load. If not, a warning is issued, prompting the operator to adjust the detection position to the standard position. This improves the validity of the acquired data and, consequently, the accuracy of the ultimately acquired road dust load value.

[0020] Furthermore, the above-mentioned road dust load detection method and system further includes a meteorological sensor for detecting wind speed, wind direction, temperature, humidity, and atmospheric pressure. Prior to step 1), the meteorological sensor is controlled to detect meteorological factors. By detecting meteorological factors and recording them in correspondence with the final data obtained, detection context can be added to the detection data, enriching the detection data.

[0021] Furthermore, the above-mentioned road dust load detection method and system further includes a touch screen industrial control panel connected to the controller; by operating on the touch screen industrial control panel, detection instructions are issued, and the controller receives the detection instructions and executes the steps of the road dust load detection method. The touch screen industrial control panel increases the human-computer interaction process, making the control process more flexible. In the event of an emergency, manual operation can be more timely to avoid damage to the equipment due to the emergency, thereby increasing the service life of the equipment.

[0022] Furthermore, in the above-mentioned road dust load detection method and system, in step 4), a control is provided for generating a detection report; the detection report includes the weighing result, the corresponding dust collection area, and the road dust load, where the road dust load is equal to the ratio of the weighing result to the corresponding dust collection area; and the detection report is transmitted to the data platform via a cellular mobile communication module. By generating the detection report and transmitting it to the data platform via the cellular mobile communication module, data is transmitted to the data platform for storage in real time, thereby preventing data loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a main structural diagram of a road dust load detection method and system according to the present invention;

[0024] Figure 2 This is a top view of a road dust load detection method and system according to the present invention;

[0025] Figure 3 This is a diagram of an electrical control system for a road dust load detection method and system according to the present invention;

[0026] Figure 4 It is a schematic diagram of the overall structure of the dust collecting and weighing device of the present invention;

[0027] Figure 5 It is a schematic diagram of the internal structure of the dust collecting and weighing device of the present invention;

[0028] Figure 6 It is a schematic structural diagram of the weighing device in the dust collecting weighing device of the present invention;

[0029] Figure 7 It is a schematic structural diagram of the lifting device in the dust collecting and weighing device of the present invention;

[0030] Figure 8 It is a schematic diagram of the internal structure of the dust collecting box in the dust collecting and weighing device of the present invention;

[0031] Figure 9 This is a schematic diagram of the interior of the dust collection box in the dust collection and weighing device of the present invention from another angle;

[0032] Figure 10This is a schematic diagram of the working principle of the dust collecting and weighing device of the present invention in the dust collecting state;

[0033] Figure 11 This is a schematic diagram of the working principle of the dust collecting weighing device of the present invention in the weighing state;

[0034] Figure 12 Schematic diagram of a lifting dust suction device for detecting road dust load according to the present invention;

[0035] Figure 13 This is a schematic structural diagram of the lifting guide unit in the lifting dust collection device of the present invention;

[0036] Figure 14 This is a schematic diagram of the locking structure of the lifting guide unit in the lifting dust collection device of the present invention;

[0037] Figure 15 This is a schematic diagram of the structure of the dust collecting bottom plate in the lifting dust collecting device of the present invention;

[0038] Figure 16 This is a top view of the dust collection base plate of the lifting dust collection device of the present invention;

[0039] Figure 17 This is a schematic diagram of the bottom surface of the dust collection base plate in the lifting dust collection device of the present invention;

[0040] Figure 18 This is a schematic diagram of the structure of the power component in the lifting dust collection device of the present invention;

[0041] Figure 19 It is a top view of the power component in the lifting dust collection device of the present invention.

[0042] Among them: 1. Weather sensor; 2. Vehicle detection; 3. Dust collection and weighing device; 4. Lifting dust collection device; 5. Distance meter; 6. 15.6-inch industrial control screen; 7. Vacuum cleaner; 8. Power supply; 9. Electrical control cabinet; 10. Floor; 11. Curb; 12. Network video recording; 13. Human-machine control console; 14. External sensor; 310. Fixed base; 3101. Housing steel plate; 3102. Slide rail fixing hole; 311. Downstream air pipe; 312. Upstream air pipe; 32. Dust box; 321. Box body; 322. Sealing cover; 323. Quick clamp; 324. Outlet welded pipe; 3241. Outlet welded pipe flange; 3242. Sealing gasket; 3243. Upstream air pipe flange barrel; 325. Inlet welded pipe; 3251. Inlet welded pipe flange; 3253. Downstream air pipe flange barrel; 326. Mounting bracket; 327. Dust filter box; 3 3. Weighing device; 331. Weighing measuring surface; 332. Weighing base; 3321. Elastic splint; 34. Lifting device; 341. Lifting platform; 3411. Hollow portion; 3415. Avoidance hole; 342. First push rod motor; 3421. Push rod motor lower support; 3422. Push rod motor upper support; 343. Guide rail; 3431. Linear bearing; 3432. Bearing support seat; 344. Frame hanger; 41. Power assembly; 4101. Power assembly protective housing; 42. Lifting guide unit; 43. Dust collection base; 4301. Dust collection base housing; 44. Structural member; 441. Fixed base; 421. Guide rail hanger; 422. Outer guide rail; 4221. Guide sliding groove; 4221 1. Side wall; 423. Inner support plate; 4231. Fixing hole; 4232. Roller; 424. Tension block; 4241. Wire rope fixing hole; 425. Rise-in-place sensor; 4251. Rise-in-place sensor bracket; 426. Lock sensor; 4261. Lock sensor bracket; 427. Push rod motor; 4271. Locking rod; 4272. Limit block; 4311. X-axis lead screw motor; 4312. X-axis lead screw; 4313. X-axis guide rail; 4314. X-axis slide plate; 4315. X-axis lead screw seat; 4321. Y-axis lead screw motor; 4322. Y-axis lead screw; 4323. Y-axis guide rail; 4324. Y-axis slide plate; 4325. Y-axis lead screw seat; 433. Dust collection frame; 434. Cleaner head; 435, position switch; 43145, long vacuum hole; 4331, cushioning seal; 4341, brush head; 411, wind-up motor; 4111, small gear; 412, lifting reel; 4121, large gear; 4122, wind-up wheel; 4123, bearing seat; 4141, manual lift guide wheel; 4142, electric lift guide wheel; 4143, guide wheel base; 4415, wire hole; 415, manual winder; 4151, handle shaft; 4152, winding reel; 4153, vertical reversing wheel; 4154, manual wind-up bracket; 4155, reversing ratchet; 4161, horizontal reversing wheel; 4162, reversing wheel base; 417, electric wire rope; 418, manual wire rope. DETAILED DESCRIPTION

[0043] The present invention will be further described in detail below with reference to the accompanying drawings.

[0044] An embodiment of a road dust load detection system:

[0045] like Figure 1 、 Figure 2 As shown, the road dust load detection system of this embodiment includes: a meteorological sensor 1, a detection vehicle 2, a dust collection and weighing device 3, a lifting and dust collection device 4, a rangefinder 5, a 15.6-inch industrial control screen 6, a vacuum cleaner 7, a power supply 8, and an electrical control cabinet 9.

[0046] A meteorological sensor 1 is mounted on the top of the inspection vehicle 2 and is used to detect five meteorological elements: wind speed, wind direction, temperature, humidity, and atmospheric pressure. The inspection vehicle 2 carries all components of the road dust load detection system. A lifting dust collection device 4 automatically collects dust from the surface to be sampled. A dust collection and weighing device 3 includes an upstream interface for connecting to an upstream dust collector and a downstream interface for connecting to a dust collection head. The upstream and downstream interfaces are connected by a collection device, forming an airflow channel between the upstream and downstream interfaces. This channel filters and collects dust collected by the lifting dust collection device 4 into a sealed dust collection box (i.e., a collection bag within the collection device) and weighs the collected dust. A distance meter 5 measures the distance between the nearest edge of the sampling window of the inspection vehicle 2 and the curb 11. Because the road dust load is measured on the portion of the road where the vehicle passes, the sampling location standard in this embodiment is set at a distance between 0.7 and 1.2 meters from the curb. The measured distance value is used to determine whether the parking position of the inspection vehicle 2 meets the sampling location standard. The vacuum cleaner 7 provides a vacuum power source for the detection system. Connected to the dust collecting and weighing device 3 and the lifting dust collecting device 4 via a ventilation hose, the vacuum cleaner 7 draws dust from the sampling window of the lifting dust collecting device 4 through its suction port into the detection system. The ventilation hose forms an airflow channel, and the collection bag of the dust collecting and weighing device 3 is located where the airflow channel connects to one end of the vacuum cleaner. A power supply 8, a battery pack, powers the entire detection system's electronic equipment and provides functions such as a power switch, a battery level indicator, and charging and discharging. The 15.6-inch industrial control screen 6 is the core processing and computing component of the fully automatic road dust load detection system and also serves as the touch-operated human-machine interface. All detection data is displayed and monitored on the screen, and the operating status of the entire equipment is also displayed and monitored on this component via network video recording 12. For example, meteorological sensor data is transmitted to the 15.6-inch industrial control screen 6 for data processing and real-time monitoring and display, as well as transmission and storage. The 15.6-inch industrial control screen 6 also has 4G data transmission capabilities, which can wirelessly transmit detection data to the Internet of Things big data management platform. The electrical control cabinet 9 is the logic processing unit for the fully automatic operation of the entire detection system. It receives operating instructions from the 15.6-inch industrial control screen 6 and then logically issues execution information to the electronic components according to the received instructions (i.e., the controller executes the instructions, implementing the steps of the road dust load detection method). Based on the 15.6-inch industrial control screen 6 and the electrical control cabinet 9, the operation of the dust collection and weighing device 3 and the lifting and dust collection device 4 is automatically controlled.

[0047] By setting the above devices in the road dust load detection system and cooperating with each other, the road dust load detection process can be realized. The specific information interaction process is as follows: Figure 3 As shown, the specific workflow is:

[0048] 1. Turn on the power switch to power the equipment of the road dust load detection system;

[0049] 2. Turn on the power switch of the human-machine control panel 13, that is, start the human-machine interaction process. Figure 3 The human-machine control console 13 shown includes a 15.6-inch industrial control screen 6, that is, the 15.6-inch industrial control screen 6 starts working. After it is fully powered on, the detection system on the industrial control screen desktop is opened, and the system window is entered. The system window includes a "Start Detection" operation button. Due to the function of the 15.6-inch industrial control screen 6, the 15.6-inch industrial control screen 6 displays a page including monitored data, device status within the system, and video (implementing anti-cheating monitoring function, which is achieved through network video recording 12).

[0050] 3. Click the "Start Detection" button to enter the detection window, which contains the following five small windows: "Test Preparation", "Zero", "Dust Collection", "Weighing", and "Generate Report".

[0051] 4. Click the first "Test Preparation" in the detection window, then click "Start Extraction" in the small window. An extraction progress bar will appear, capturing and displaying the monitored static data and images. The progress bar will automatically close after 100%. If there are no abnormalities, click "Next" to enter the "Reset" step. The "Test Preparation" step is to detect whether there are any abnormalities in the system equipment. At the same time, the off-vehicle sensor 14 includes a meteorological sensor 1 and a rangefinder 5. The meteorological sensor 1 can detect the five meteorological elements and collect distance data through the off-vehicle sensor 14. It can determine whether the vehicle parking position meets the sampling position standard. If it does not meet the sampling position standard, a warning will be output to remind the operator to move the vehicle to the standard sampling position for sampling. The following steps can be performed only after reaching a position that meets the sampling position standard.

[0052] 5. After entering the "zeroing" step, click "start zeroing", and a zeroing progress bar will also appear. The "start zeroing" step is the step of zeroing the weighing device of the dust collecting weighing device 3. After clicking "start zeroing" on the 15.6-inch industrial control screen, the electrical control cabinet 9 receives the "start zeroing" operation instruction sent by the 15.6-inch industrial control screen, and controls the dust collecting weighing device 3 to perform the zeroing operation. The specific zeroing operation of the dust collecting weighing device 3 is: lower the dust collecting sealing box, and after it is in place (that is, lower the collecting device so that the collecting device is placed on the weighing surface of the weighing device), weigh it after it stands still for 2 seconds, and record the initial value A1 of the balance (that is, the weighing device). That is, the "zeroing" step is to obtain the weight of the empty dust collecting sealing box when the road dust is not collected; after the initial value A1 is recorded, the dust collecting sealing box is raised, and it is raised to separate the dust collecting sealing box from the surface of the weighing device. In this embodiment, when the dust collecting weighing device 3 does not need to be weighed, the dust collecting sealing box is suspended in the air, that is, it does not contact the weighing surface of the weighing device, avoiding the situation that the weighing device is in the weighing mode, that is, the working state when no weighing is required, reducing the weighing process of the weighing device, and thus avoiding the dust collecting weighing device from transmitting useless data to the 15.6-inch industrial control screen 6, thereby also reducing the use of storage space for storing useless data on the 15.6-inch industrial control screen 6, and the process of screening data, so that the obtained weighing data is more accurate, and also avoids the bumpy road during vehicle driving, so that the weighing device is kept in the weighing state and the data is constantly changing, resulting in a decrease in the accuracy of the weighing device, thereby improving the accuracy of the weighing data and also increasing the service life of the weighing device.

[0053] After the "Reset" step is completed, that is, the progress bar will close automatically after reaching 100%, click "Next".

[0054] 6. Enter the "Dust Collection" window. Click "Start Dust Collection" and a dust collection progress bar will appear. After clicking "Start Dust Collection" on the 15.6-inch industrial control screen, the electrical control cabinet 9 receives the "Start Dust Collection" operation instruction from the 15.6-inch industrial control screen 6 and controls the lifting dust collection device 4 to perform the dust collection operation. The specific dust collection operation of the lifting dust collection device 4 is as follows:

[0055] 1) The lifting motor M4 circuit is turned on, and the dust collecting device descends (i.e., the lifting dust collecting device is controlled to descend). After landing, the lower end limit switch K2 is triggered. Then, after the lifting motor M4 circuit is turned off after the collection frame is in place (until the collection frame contacts the ground 10), the lifting motor M4 circuit is turned off, and the lifting dust collecting device 4 stops descending;

[0056] 2) The vacuum cleaner motor M5 is automatically turned on. After 2 seconds, the X-axis / Y-axis stepper motor Mx / My starts working from the origin, controlling the spiral trajectory according to the set degree. After the route is completed (that is, after the dust in the collection area defined by the collection frame is collected), it returns to the origin. After 2 seconds, the vacuum cleaner motor M5 is automatically turned off, and the dust in the area is completely collected. The collected dust eventually reaches the dust collection and weighing device 3.

[0057] 3) Then the lifting motor M4 circuit is automatically reversed, and the dust suction device rises. After it is raised into position (that is, the lifting dust suction device is controlled to rise off the ground), the upper limit switch K3 is triggered, and the lifting motor M4 circuit is disconnected.

[0058] After the "Dust Collection" step is completed, that is, the dust collection progress bar will close automatically after reaching 100%, click "Next".

[0059] 7. Enter the "Weighing" window and click "Start Weighing, a weighing progress bar will appear". After clicking "Start Weighing" on the 15.6-inch industrial control screen, the electrical control cabinet 9 receives the "Start Weighing" operation instruction from the 15.6-inch industrial control screen 6, and controls the dust collecting weighing device 3 to perform the weighing operation. The specific weighing operation of the dust collecting weighing device 3 is as follows: the dust collecting sealing box is set on the moving part of the lifting system, and the weighing surface of the weighing device is located at the end section of the moving path of the lowering process of the moving part of the lifting system. The moving part of the lifting system lowers the dust collecting sealing box. After it is in place (even if the collecting device is placed on the weighing surface of the weighing device), it is weighed after standing for 2 seconds, and the balance weighing value A2 is recorded. That is, the "weighing" step is to obtain the total weight of the dust collecting sealing box and the collected dust after collecting the road dust; after the weighing value A2 is recorded, the dust collecting sealing box is raised, and it is completed after it rises to the weighing surface of the weighing device and separates from the dust collecting sealing box. In this embodiment, in the "dust collection" step, the dust collecting and weighing device 3 simultaneously filters the dust collected by the lifting dust suction device 4. After the lifting dust suction device 4 completes dust collection, the dust collecting and weighing device 3 completes filtering the dust collected by the lifting dust suction device 4, leaving only the accumulated dust required for detecting the road dust load in the collection bag in the dust collecting sealing box. Therefore, after the "dust collection" step is completed, the "weighing" step can be quickly entered, thereby improving the detection efficiency of the detection system. Moreover, because the dust collecting and weighing device 3 has the function of dust filtering, the weighing data obtained is the accurate data required for road dust load detection, thereby improving the accuracy of the collected data.

[0060] As another embodiment, the specific weighing operation of the dust collecting weighing device 3 is as follows: the weighing device is arranged on the moving part of the lifting system, the dust collecting sealing box is located at the end of the moving path of the lifting system moving part during the rising process, and the lifting system moving part raises the weighing device. After it is in place (that is, the weighing surface of the weighing device completely lifts the dust collecting sealing box), it is weighed after standing still for 2 seconds, and the balance weighing value A2 is recorded, that is, the "weighing" step is to obtain the total weight of the dust collecting sealing box and the collected dust after collecting the road dust; after the weighing value A2 is recorded, the weighing device is lowered, and it is completed after it is lowered to the weighing surface of the weighing device and separated from the dust collecting sealing box.

[0061] The progress bar will close automatically after reaching 100%, click "Next".

[0062] 8. Enter the "Generate Report" window, which directly displays A1, A2, and the calculated dust load value. The calculation process is very fast (no calculation button is required). Enter the list of inspectors and the name of the inspection unit (red seal), click "Save"; then click the "Generate Report" button. A one-page report preview will be automatically generated for the inspection, and a "Test Completed" pop-up window will pop up. The report will be saved to the local computer or even uploaded to the backend. Set the "Print" button in the preview to print the report; close the preview report and the "Test Completed" pop-up window, return to the system window, and the inspection is complete.

[0063] The present embodiment provides a road dust load detection system that realizes dust sampling and weighing detection. Through manual operation on the industrial control screen, the controller executes the operation instructions, and the control device automatically collects dust and weighs, thereby improving the efficiency of detection. At the same time, because the lifting dust suction device and the dust collection and weighing device have the above functions, the obtained weighing data is more accurate, thereby achieving the data being the actual road dust weight obtained in real time, and thus the accuracy of the detection results is also guaranteed.

[0064] As an implementation method, the dust collection and weighing device may specifically be:

[0065] like Figure 4 The dust collecting weighing device shown in the figure for detecting road dust load includes a fixed base 310 and a shell steel plate 3101 fixed to the edge of the fixed base 310 for protecting the internal components. The fixed base 310 is provided with a weighing device 33, a lifting device 34 ( Figure 4 The weighing device 33 and the lifting device 34 are not shown) and the dust box 32 because they are blocked by the outer shell steel plate 3101.

[0066] Figure 5 The internal structure of the device of the present invention is shown after removing the outer shell steel plates 3101 of the two adjacent surfaces. Figure 6As shown, it includes a weighing base 332 and a weighing measurement surface 331. When the weighing base 332 is fixed, the force acting on the weighing measurement surface 331 can be measured by the weighing device 33. The weighing base 332 is fixedly mounted on the fixed base 310 through an elastic clamp 3321.

[0067] Lifting device 34 as Figure 7 As shown, the guide portion includes four guide rails 343. The lower ends of the guide rails 343 are fixed in the rail fixing holes 3102 of the fixed base 310, and the upper ends of the guide rails 343 are fixed to the horizontal flange of the outer shell steel plate 3101 via bearing support seats 3432. (The horizontal flange of the outer shell steel plate 3101 can be integrally formed with the outer shell steel plate, or it can be a horizontal steel plate fixedly connected to the outer shell steel plate 3101, and the horizontal steel plate is considered to be part of the outer shell steel plate 3101.) The main body of the lifting device 34, or the active part, is the lifting platform 341. The lifting platform 341 is hollowed out in the middle to form a frame structure. Linear bearings 3431 are fixed and penetrated at the four corners of the lifting platform 341. The linear bearings 3431 are slidably mounted on the corresponding guide rails 343. The hollow portion 3411 formed by the hollowing out of the middle of the lifting platform 341 is larger in area than the weighing measurement surface 331 of the weighing device 33.

[0068] The power part of the lifting device 34 is two first push rod motors 342, which are arranged on two opposite sides of the lifting platform. The lower end of the first push rod motor 342 is hinged to the lower support 3421 of the push rod motor fixed on the fixed base 310. The hinged connection increases the fault tolerance of the system, allowing the first push rod motor 342 to swing to a certain extent, preventing the lifting platform 341 from getting stuck during movement; the lifting platform 341 is provided with an avoidance hole 3415 at the position corresponding to the first push rod motor 342, and the avoidance hole 3415 can be formed integrally with the middle hollow part 3411 of the lifting platform 341 frame. The first push rod motor 342 is vertically arranged, and its upper end passes through the avoidance hole 3415 and is hinged to the upper support 3422 of the push rod motor, and is connected to the frame hanger 344 through the upper support 3422 of the push rod motor. The lifting platform 341 is hoisted at the lower end of the frame hanger 344. The first push rod motor 342 passes through the lifting platform 341 and is hoisted from above by a hanger, allowing the lifting platform 341 to move downward with more room for movement, facilitating weighing the dust box 32 on the lifting platform after descent. When the lifting platform 341 descends to the end of its downward travel, the weighing measurement surface 331, which has an area smaller than the hollow portion 3411, passes through the hollow portion 3411. The weighing measurement surface 331 is vertically higher than the frame of the lifting platform 341. At this time, the weighing device 33 can weigh the dust box 32 placed on the lifting platform 341.

[0069] As other embodiments, the power part of the lifting device 34 can also adopt other linear motion drive components such as hydraulic cylinders, and the number is not limited to 2; if the axial dimension of the power part is short enough to meet the downward movement space of the lifting platform 341, the frame hanger 344 can be omitted and it can be directly hinged to the lower surface of the lifting platform; the power part can also be installed between the top of the dust collecting and weighing device box and the lifting platform 341 (in the previous embodiment, it was installed between the base and the lifting platform 341). At this time, the downward movement of the lifting platform 341 is not affected by the axial dimension of the power part, so there is no need to set the frame hanger 344. For example, the upper end of the first push rod motor 342 is connected to the top structure of the device, and the lower end is directly connected to the lifting platform 341; the guide part guide rail 343 not only guides and balances the movement of the lifting platform 341, but also increases the structural stability of the device box, and its number can also be increased or decreased as needed.

[0070] The power part can also adopt the form of sling in conjunction with winding motor or winch, and cooperate with guide rail to ensure the linear lifting motion of lifting platform. Lifting device 34 can also adopt scissor-type lifting mechanism, and guide part and power part are combined into one.

[0071] Dust box 32 Figure 5 As shown, the dust box body 321 is placed on a lifting platform 341 (not fixedly connected). Specifically, the dust box body 321 spans the hollow portion 3411 of the lifting platform 341 frame. At least two opposing frames of the lifting platform 341 frame support the dust box body 321. A dust box body sealing cover 322 is provided on the dust box body 321. The sealing cover 322 is pressed against the upper opening of the body 321 by a quick clamp 323 provided on the body 321. The quick clamp 323 enables rapid opening and closing of the sealing cover 322. A sealing gasket creates an airtight seal between the sealing cover 322 and the body 321. The dust box body 321 is also provided with an inlet welded pipe 325 and an outlet welded pipe 324. The outlet welded pipe 324 and the inlet welded pipe 325 are fixedly connected to the box body 321 through corresponding outlet welded pipe flanges 3241 and inlet welded pipe flanges 3251 respectively. The outlet welded pipe flanges 3241 and inlet welded pipe flanges 3251 are airtightly sealed with the box body 321 through corresponding sealing gaskets.

[0072] The outlet welded pipe 324 and the inlet welded pipe 325 are respectively airtightly connected to the upstream air pipe 312 and the downstream air pipe 311 provided on the outer shell steel plate 3101 of the dust collecting and weighing device to form a dust collection pipeline. The upstream air pipe 312 is used to connect to a wind pressure generating device, such as a negative pressure cyclone device of a vacuum cleaner; the downstream air pipe 311 is used to connect to the dust collection head of the dust collection device, and the dust collection head is aimed at the ground to collect dust on the ground. In this embodiment, two upstream air pipes 312 and two downstream air pipes 311 are respectively provided, and two corresponding outlet welded pipes 324 and two corresponding inlet welded pipes 325 are also provided. The present invention does not limit the number of corresponding dust collection pipelines. The upstream air pipe 312 and the downstream air pipe 311 are respectively fixed on the horizontal steel plate of the outer shell steel plate 3101 by the corresponding upstream air pipe flange barrel 3243 and downstream air pipe flange barrel 3253.

[0073] The outlet welded pipe 324 and the inlet welded pipe 325 are aligned with the corresponding upstream air pipe 312 and downstream air pipe 311 in the vertical direction (the direction of movement of the lifting platform 341), but they are not fixed. When the lifting platform 341 is raised to the highest position of its travel, the dust box body 321 is also at the highest position. At this time, the outlet welded pipe 324 and the inlet welded pipe 325 are aligned with the corresponding upstream air pipe 312 and downstream air pipe 311 through the sealing gasket 3242 ( Figure 5 The sealing gasket 3242 shown in the figure is a sealing gasket between an upstream air pipe 312 and the corresponding outlet welded pipe 324. Other air pipes and welded pipes also have corresponding sealing gaskets. They are in sealed contact but not fixedly connected. The sealed joint is located within the corresponding air pipe flange barrel, and the airtight connection is achieved by squeezing the sealing gasket 3242. When the lifting platform 341 descends, the outlet welded pipe 324 and the inlet welded pipe 325 automatically separate from the corresponding upstream air pipe 312 and downstream air pipe 311, without affecting the descent of the box 321 with the lifting platform 341. After the corresponding separation, the wall of the air pipe flange barrel 3253 forms a limit for the corresponding sealing gasket 3242, preventing it from falling. At the same time, the contact surface between the welded pipe and the corresponding air pipe is horizontal, which also prevents the sealing gasket 3242 from slipping.

[0074] The interior of the dust collecting box 321 is a part of the sealed dust collecting air path, which is responsible for dust filtering and collection. Figure 8 、 9As shown (housing 321 is not shown), corresponding to the two air paths, two dust filter boxes 327 are included. Dust filter boxes 327 are covered with a filter screen on at least one side, for example, the side facing the airflow outlet where the outlet pipe 324 connects to housing 321. The filter screen allows air to pass through but removes dust particles smaller than 75 microns (the target particulate matter for dust load calculations). Therefore, the filter screen's mesh size should be sufficient to isolate and block the dust particles targeted by the dust load test. After being connected to housing 321 via inlet pipe flange 3251, inlet pipe 325 extends further into housing 321 and is then connected to dust filter boxes 327 via mounting bracket 326. An airflow channel is formed between inlet pipe 325 and outlet pipe 324. The filter box is located at the connection between inlet pipe 325 and housing 321, meaning the filter screen covers the airflow channel, intercepting and collecting dust entering through the airflow channel.

[0075] As another embodiment, the dust filter box 327 can also be replaced with a disposable dust bag or a dust bag with a certain service life. The dust bag has the ability to filter dust throughout the body, and the dust bag is installed at the interface between the inlet welded pipe 325 and the box body 321 through the installation structure.

[0076] The working process and principle of the dust collection and weighing device of the present invention are as follows:

[0077] like Figure 10 As shown, after the upstream vacuum cleaner is started, a certain vacuum is generated, which creates negative pressure in the dust collection pipeline, thereby forming suction at the dust collection head and generating airflow towards the dust collection head in a certain space outside the dust collection head. The airflow carries the dust on the ground from the dust collection head into the dust collection pipeline. The airflow entrained with dust enters the dust filter box 327 from the downstream air pipe 311 and the inlet welded pipe 325. The filter intercepts the corresponding particulate matter. The clean air that passes through the filter continues to enter the outlet welded pipe 324 and is finally discharged into the atmosphere through the vacuum cleaner's vent pipe. The dust intercepted in the dust collection box body 321 falls into the dust filter box 327, which increases the weight of the entire dust collection box 32.

[0078] After vacuuming thoroughly and collecting dust on the sample floor, Figure 11As shown, the first push rod motor 342 of the lifting device 34 is activated, causing the lifting platform 341 to descend, and the dust box 32 placed on the lifting platform 341 also descends. When it descends to the end of the motion path, the weighing measurement surface 331 of the weighing device 33 supports the lower surface of the dust box 321 through the hollow portion 3411 of the lifting platform 341 frame. The dust box 321 separates from the lifting platform 341 frame, and its weight acts entirely on the weighing measurement surface 331 of the weighing device 33. At this time, the total weight of the dust box 321 is read from the weighing device 33. The previously obtained weight of the dust box 321 is subtracted from the total weight to obtain the weight of the dust collected this time. This is then divided by the area of ​​the sample floor from which the dust was collected to obtain the dust load.

[0079] The weight of the box body 321 obtained in advance can be obtained by lowering the weighing device 33 before vacuuming to weigh the empty box before vacuuming. As the weight of the box body 321 obtained in advance, it can be avoided that the box body 321, the dust filter box 327 and the filter screen retain difficult-to-remove dirt as the years and times of use increase, resulting in inaccurate weight of the box body 321, thereby affecting the accuracy of the dust load detection result.

[0080] As another embodiment, the dust collecting and weighing device can also be:

[0081] In the above embodiment, the lifting mechanism 34 of the dust collecting and weighing device weighs the dust collecting box body 321 by lowering the lifting platform 341. The only difference between this embodiment and the above embodiment is that the weighing device 33 can also be placed on the lifting platform 341 of the lifting mechanism 34, and the dust collecting box body 321 is installed at the end of the upward movement path of the lifting platform 341. The installation structure of the installation body 321 reserves a clear space in the middle position for the weighing and measuring surface 331 of the weighing device 33 to rise and pass through (similar to the hollow portion 3411 provided in the middle of the lifting platform 341 of the dust collecting and weighing device in the above embodiment; in the dust collecting and weighing device in this embodiment, since the lifting platform 341 does not need to pass through the weighing and measuring surface 331 of the weighing device 33, the hollow portion 3411 is not required). At the same time, the box body 321 is connected to the upstream air pipe 312 and the downstream air pipe 311 by lightweight hoses with a certain amount of margin.

[0082] When weighing is required, the lifting platform 341 of the weighing device 33 rises, driving the weighing device 33 to rise until it contacts the bottom surface of the dust box body 321. Since the body 321 is connected to the upstream air pipe 312 and the downstream air pipe 311 through a hose, when the weighing device 33 continues to rise, the weighing measuring surface 331 of the weighing device 33 passes through the empty space of the erection structure to support the dust box body 321 away from the erection structure. The weight of the body 321 falls entirely on the weighing measuring surface 331 of the weighing device 33 on the lifting platform. At this time, the weight of the body 321 can be read through the weighing device 33.

[0083] As an embodiment, the lifting dust collecting device may be:

[0084] like Figure 12 The illustrated embodiment of a lifting dust collection device for detecting road dust load includes a power assembly 41 and a dust collection device. The dust collection device comprises a lifting guide unit 42 and a dust collection base 43. The power assembly 41 is provided with a power assembly protective housing 4101, and the dust collection base 43 is provided with a corresponding dust collection base housing 4301. The power assembly 41 is mounted on a fixed base 441, and the dust collection base 43 is fixed to the fixed base 441 via the lifting guide unit 42. The fixed base 441 is fixed to a structural member 44 of the dust load detection device, which can be, for example, the chassis of a dust load monitoring vehicle.

[0085] The lifting guide unit 42 is as follows Figure 13 As shown, it includes a pair of outer guide rails 422 and inner support plates 423 that slide together to guide each other. The outer guide rails 422 are fixed to the fixed base plate 441 via guide rail hangers 421, and the inner support plates 423 are fixed to both sides of the dust collection base plate 43. A tension block 424 for connecting to a wire rope is also fixed to the inner support plate 423. The two wire rope fixing holes 4241 on the tension block 424 are used to connect the wire rope for electric lifting and the wire rope for manual lifting, respectively. The wire ropes pull the inner support plate 423 and the dust collection base plate 43 to achieve the lifting action.

[0086] The part where the inner support plate 423 and the outer guide rail 422 are guided and slidably matched adopts a group of rollers 4232. Specifically, each outer guide rail 422 includes two guide sliding grooves 4221. The corresponding inner support plate 423 is provided with two upper and lower rollers 4232 corresponding to each guide sliding groove 4221. The rollers 4232 are slidably matched with the side walls 42211 of the guide sliding groove 4221. The two tracks and the two rollers at a set distance on each track ensure the stability of the dust collection base plate 43 when the inner support plate 423 drives the dust collection base plate 43 to rise and fall and the horizontal state of the dust collection base plate 43.

[0087] The inner support plate 423 is provided with a fixing hole 4231. After the inner support plate 423 is raised to its position, the locking rod 4271 is inserted into the corresponding fixing hole 4231 to fix the dust collecting bottom plate 43 which has been retracted into its position. Figure 14As shown, locking rod 4271 is driven by push rod motor 427. The extension and retraction of locking rod 4271 is constrained to axial extension and retraction by the stopper hole of stopper block 4272. Stopper block 4272 is mounted with a lock sensor 426 via a lock sensor bracket 4261. Lock sensor 426 can be a microswitch. When locking rod 4271 is extended, lock sensor 426 is triggered. That is, when locking rod 4271 enters fixing hole 4231 and secures the dust collection base plate 43 in the retracted position, lock sensor 426 outputs a lock signal. Push rod motor 427 and stopper block 4272 are fixedly mounted on fixed base plate 441.

[0088] When the dust collecting base plate 43 rises to the retracted position, a rise position sensor 425 is provided at a corresponding position on the top of the inner support plate 423 of the fixed base plate 441. The rise position sensor 425 is mounted on a rise position sensor bracket 4251 and can utilize a micro switch. When the dust collecting base plate 43 rises to the retracted position, an arc-shaped top angle of the inner support plate 423 triggers the micro switch of the rise position sensor 425, which then outputs a rise position signal indicating that the dust collecting base plate 43 has risen to the retracted position.

[0089] Two opposite sides of the dust collecting base plate 43 are respectively provided with a set of outer guide rails 422 and inner support plates 423. Each inner support plate 423 is provided with a corresponding rising position sensor 425 and a retracting position locking device (including a push rod motor 427, a locking rod 4271 and other related structures). Figure 14 Only the above structure corresponding to one of the inner support plates 423 is shown.

[0090] The dust collecting bottom plate 43 is as follows Figure 15 As shown, in order to clearly show the internal structure of the dust collecting base 43, the dust collecting base shell 4301 around the dust collecting base 43 and the inner support plate 423 and outer guide rail 422 on one side are no longer shown. The dust collecting base 43 includes a hollow dust collecting frame 433. The area of ​​the dust collecting frame 433 is a set value for calculating the dust load. The dust load of the area is numerically equal to the weight of the dust accumulated in the frame divided by the area of ​​the dust collecting frame 433. Of course, to ensure accuracy, the dust load can also be divided by the weight of the dust sampled at N locations and N times the area of ​​the dust collecting frame 433. Position switches 435 are set on the other two edges of the dust collecting base 43 to indicate that the dust collecting base 43 has been lowered to the ground; they can also indicate that the dust collecting base 43 has been raised off the ground.

[0091] The dust collection base plate 43 is provided with a dust collection head 434 in the dust collection frame 433 through a dual-axis planar motion mechanism. The dual-axis planar motion mechanism can realize the movement of the dust collection head 434 to any position in the entire dust collection frame 433, ensuring that the dust collection head 434 collects dust at any position in the dust collection frame 433.

[0092] Specifically, in combination with the top view of the dust collecting bottom plate 43 Figure 16 As shown, the dual-axis planar motion mechanism includes an X-axis lead screw 4312 disposed on one side of the dust collection frame 433. The X-axis lead screw 4312 is connected to the X-axis lead screw motor 4311 via a coupling. Both ends of the X-axis lead screw 4312 are fixed to the dust collection frame 433 via X-axis lead screw seats 4315. The X-axis lead screw 4312 drives the X-axis slide plate 4314 to move along the X-axis on two X-axis slide rails 4313. The two X-axis slide rails 4313 are respectively disposed on corresponding sides of the dust collection frame 433. The X-axis slide plate 4314 spans the width of the dust collection frame 433, and its motion path covers the entire dust collection frame 433. The X-axis slide plate 4314 has a long vacuum hole 43145 along the width of the vacuum frame for accommodating the vacuum head 434. A Y-axis lead screw 4322 and a Y-axis guide rail 4323 are provided on either side of the X-axis slide plate 4314. The Y-axis lead screw 4322 is connected to the Y-axis lead screw motor 4321 via a coupling. Both ends of the Y-axis lead screw 4322 are secured to the X-axis slide plate 4314 via Y-axis lead screw seats 4325. The Y-axis lead screw 4322 drives the Y-axis slide plate 4324, which moves along the Y-axis on the Y-axis guide rail 4323. In this embodiment, due to space limitations on the X-axis slide plate 4314, only one Y-axis rail 4323 is provided. To ensure smooth movement, the sliding engagement between the Y-axis slide plate 4324 and the Y-axis rail 4323 is longer than the threaded engagement between the Y-axis slide plate 4324 and the Y-axis lead screw 4322. The Y-axis slide plate 4324 spans the long dust collection hole 43145, its motion path covering the entire length of the long dust collection hole 43145. A dust collection head 434 is fixedly mounted on the Y-axis slide plate 4324, extending from the long dust collection hole 43145 toward the ground. The X-axis lead screw motor 4311 and the Y-axis lead screw motor 4321 can be stepper motors.

[0093] In order to cushion the impact of the dust collection frame 433 on the ground when it falls, reduce vibration, extend the life of the internal components of the dust collection bottom plate 43, increase the reliability of the lifting dust collection device, and at the same time increase the sealing between the dust collection frame 433 and the ground, and prevent the dust outside the dust collection frame from being sucked in and causing inaccurate dust load measurement, such as Figure 17 As shown, an annular closed cushioning seal 4331 is provided at the annular frame where the dust collection frame 433 contacts the ground. The cushioning seal 4331 can be made of rubber or silicone. To ensure a cleaner and more accurate suction and collection of accumulated dust, and to prevent the dust collection head 434 from being too close to the ground and potentially damaging it during descent, a brush head 4341 is provided at the end of the dust collection end of the dust collection head 434. When the dust collection frame 433 descends to the ground, the brush head 4341 contacts the ground.

[0094] The various parts of the power component 41 are arranged on the fixed base plate 441. The dust collection base plate 43 is connected to the lifting guide unit 42 and is fixedly suspended on the fixed base plate 441 through the guide rail hanging plate 421. The power component 41 provides power to make the dust collection base plate 43 rise and fall and fall to collect dust under the guidance of the lifting guide unit 42.

[0095] Specifically, if Figure 18 As shown, the electric lifting mechanism of the power assembly 41 includes a lifting motor 411 and a lifting reel 412. The lifting motor 411 drives the lifting reel 412 via a speed-reducing and torque-increasing gear set. In this embodiment, the speed-reducing and torque-increasing gear set includes a small gear 4111 disposed at the shaft end of the lifting motor 411 and a large gear 4121 disposed at a corresponding position on the lifting reel 412. The small gear 4111 and the large gear 4121 engage to transmit power from the lifting motor 411 to the lifting reel 412. The lifting reel 412 is fixed to the fixed base plate 441 via bearing seats 4123 at both ends. It extends axially to fixed positions on two outer guide rails 422. A lifting wheel 4122 is also fixed to the lifting reel 412 at positions corresponding to the two outer guide rails 422. The outer circumferential surface of the lifting wheel 4122 is formed with a winding groove. A guide wheel base 4143 is fixed to the top of each of the two outer guide rails 422. A guide wheel group is fixed to the opposite side of the two guide wheel bases 4143. The guide wheel group includes two horizontally adjacent guide wheels. The guide wheel close to the lifting reel 412 is the electric lifting guide wheel 4142, and the other guide wheel is the manual lifting guide wheel 4141. A winding groove is opened on the outer circumference of the electric lifting guide wheel 4142. It is in the same vertical plane as the winding groove on the outer circumference of the lifting wheel 4122. The electric wire rope 417 fixedly wound at the end of the winding groove of the lifting wheel 4122 passes through the winding groove of the electric lifting guide wheel 4142 from above, and is combined with the electric wire rope 417 to pass through the winding groove of the electric lifting guide wheel 4142. Figure 19 As shown in the top view of the power assembly 41, the fixed base plate 441 has a wire hole 4415 directly below the guide wheel assembly. Directly below the wire hole 4415 is a tension block 424 on the inner support plate 423. The electric wire rope 417 passes around the electric lifting guide wheel 4142, then vertically downward through the wire hole 4415 and is secured to the tension block 424 via the wire rope fixing hole 4241 on the tension block 424. The hoisting motor 411 decelerates, driving the lifting reel 412 to rotate, which in turn drives the hoisting wheel 4122 to rotate in the direction of releasing the electric wire rope 417, releasing the electric wire rope 417 and passing it around the electric lifting guide wheel 4142, thereby lowering the inner support plate 423 and the dust collection base 43. The hoisting motor 411 rotates in the reverse direction, decelerating, driving the lifting reel 412 to rotate in the reverse direction, winding and retracting the electric wire rope 417, pulling the inner support plate 423 and the dust collection base 43 upward.

[0096] In this embodiment, large holes are provided on the fixed base plate 441 at positions corresponding to the outer guide rails 422 for the outer guide rails 422 to pass through the fixed base plate 441. The opposite sides of the two opposing outer guide rails 422 are fixed to the fixed base plate 441 via angle steel guide rail hangers 421. A vertical right-angled surface of the angle steel guide rail hanger 421 is fixed to the vertical surface of the outer guide rail 422, and a horizontal right-angled surface of the angle steel guide rail hanger 421 is fixed to the horizontal surface of the fixed base plate 441. The large holes of the fixed base plate 441 on the opposite sides of the two opposing outer guide rails 422 form or serve as wire holes 4415. In addition, in order to achieve the rising and locking of the inner support plate 423 and the dust collection base plate 43 through the fixed hole 4231 on the inner support plate 423, and to trigger the micro switch of the rising and positioning sensor 425 through the inner support plate 423 to achieve the rising and positioning detection, the inner support plate 423 needs to rise and pass through the fixed base plate 441. Therefore, the corresponding large hole for the outer guide rail 422 to pass through should leave a margin for the inner support plate 423 to pass through on the opposite side of the outer guide rail 422. This margin should meet the needs of the wire hole 4415 to pull the inner support plate 423 through the wire.

[0097] The power assembly 41 also includes a manual hoist 415, which is fixed with a handle shaft 4151 on the fixed base plate 441 through a manual hoist bracket 4154, a winding wheel 4152 and a vertical reversing wheel 4153 that are meshed with the handle shaft 4151 through gears, and the rotation direction of the handle shaft 4151 can be achieved by a reversing ratchet 4155. On the fixed base plate 441, a horizontal reversing wheel 4161 is fixedly provided at the position corresponding to the vertical reversing wheel 4153 and the manual lifting guide wheel 4141. The horizontal reversing wheel 4161 is fixed to the fixed base plate 441 through a reversing wheel base 4162. The outer circumferences of the vertical reversing wheel 4153, the horizontal reversing wheel 4161 and the manual lifting guide wheel 4141 are all provided with wire grooves. The manual wire rope 418 fixedly wound on the upper end of the winding wheel 4152 passes around the vertical reversing wheel 4153 from below, combined with Figure 19As shown in the top view of the power assembly 41, the direction of the manual wire rope 418 is changed from vertical to horizontal, and then it passes around the horizontal reversing wheel 4161 from the outside, so that the manual wire rope 418 is turned 90 degrees in the horizontal direction toward the manual lifting guide wheel 4141, and then it passes around the manual lifting guide wheel 4141 from the top and passes vertically downward through the wire hole 4415 and is fixed to the tensioning block 424 using the wire rope fixing hole 4241 on the tensioning block 424. A crank is installed at the end of the handle shaft 4151, and the rotation direction of the handle shaft 4151 is adjusted by adjusting the reversing ratchet 4155. Obviously, the rotation directions of raising and lowering are opposite. When the electric lifting mechanism fails, the crank is manually turned to wind and retract the manual wire rope 418. Through the reversing action of the vertical reversing wheel 4153, the horizontal reversing wheel 4161 and the manual lifting guide wheel 4141, the manual wire rope 418 pulls the dust collection base 43 up through the inner support plate 423, avoiding the problem that the dust collection base 43 cannot be raised and retracted when the electric mechanism fails.

[0098] Example of a method for detecting road dust load:

[0099] The road surface dust load detection method of the present invention has been clearly introduced in the work flow part of the road surface dust load detection system embodiment, and will not be repeated here.

[0100] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A road dust load detection system, characterized in that: The utility model comprises a dust collecting weighing device for weighing the collected dust, a lifting dust suction device for collecting the dust on the road surface and a controller arranged on the bottom surface of the vehicle, wherein the lifting dust suction device comprises a lifting guide unit and a dust suction base plate, wherein the dust suction base plate is fixed to the fixed base plate fixed to the vehicle chassis through the lifting guide unit, and the dust suction base plate comprises a collection frame for framing the dust collection area and a dust suction head that can move freely in the collection frame; a power component and a locking structure are arranged on the fixed base plate; the lifting guide unit comprises a pair of outer guide rails fixed to the fixed base plate and an inner support plate fixed to the dust suction base plate, which are respectively arranged on two opposite side surfaces of the dust suction base plate, and are guided and slidably matched with each other, and the inner support plate is fixed to the dust suction base plate, and a fixing hole is arranged on the inner support plate, and the locking structure is used to fix the dust suction base plate in the retracted position by passing the locking rod through the fixing hole after the dust suction base plate and the inner support plate are retracted into place; the power component comprises a lifting motor and a lifting mechanism. The reel and the lifting motor drive the lifting reel through the speed reduction and torque increase gear set, and a lifting wheel is also provided at the corresponding positions of the two outer guide rails on the lifting reel; an electric lifting guide wheel is provided on the top of each of the two outer guide rails, and the electric steel wire ropes fixedly wound around the end portions of the winding grooves of the two lifting wheels respectively pass around the corresponding electric lifting guide wheels from above and are fixed downward to the corresponding inner support plates; the dust collecting and weighing device includes an upstream interface for connecting an upstream dust cleaner and a downstream interface for connecting a dust cleaning head, the upstream interface and the downstream interface are connected by a collecting device, an air flow channel is formed between the upstream interface and the downstream interface, and a collection bag for collecting dust is provided on the air flow channel, the collection bag allows air flow to pass through but filters out dust particles of a set size; the dust collecting and weighing device also includes a weighing device for weighing the collection bag; the controller is used to execute instructions to implement the following steps of the road area dust load detection method: 1) controlling the dust collecting base plate of the lifting dust collecting device to descend until the collection frame contacts the ground; 2) controlling the vacuum head to move in the collection frame to collect dust, with the moving dust collection path covering the entire dust collection area; The air flow carrying the dust on the ground in the collection frame passes through the collection bag, and the collection bag filters the dust and collects it in the collection bag; 3) controlling the weighing device to weigh the collecting device and obtain the road dust load; 4) Control the dust collection base plate of the lifting dust collection device to rise off the ground.

2. The road dust load detection system according to claim 1, characterized in that: Manual lifting guide wheels are also provided on the top of the two outer guide rails; the power assembly also includes a manual hoist, which includes a handle shaft, a winding wheel engaged with the handle shaft, and a vertical reversing wheel; the vertical reversing wheels are respectively provided with horizontal reversing wheels at positions corresponding to the two manual lifting guide wheels; the manual wire rope fixedly wound around the upper end of the winding wheel passes around the vertical reversing wheel from below to turn the manual wire rope from vertical to horizontal, and then passes around the two horizontal reversing wheels from the outside to turn the manual wire rope towards the corresponding manual lifting guide wheel, and then passes around the corresponding manual lifting guide wheel from above and is fixed vertically downward to the corresponding inner support plate.

3. The road dust load detection system according to claim 1, characterized in that: The dust collecting and weighing device further comprises a lifting system, wherein the collecting device is arranged on the moving part of the lifting system, and the weighing surface of the weighing device is located at the end of the moving path of the lifting system moving part during the descending process; when no weighing is performed, the lifting system moving part rises, and the collecting device does not contact the weighing surface of the weighing device; In step 3), the method for weighing the collecting device includes controlling the moving part of the lifting system to lower the collecting device so that the collecting device is placed on the weighing surface of the weighing device, reading the reading of the weighing device, and then raising the moving part to separate the weighing surface of the weighing device from the collecting device.

4. The road dust load detection system according to claim 3, characterized in that: Before step 2), the method further includes a step of returning the weighing device to zero, controlling the collecting device to descend until the collecting device is placed on the weighing surface of the weighing device, and the weighing device weighs the collecting device without filtering the dust. After the weighing is completed, the collecting device is controlled to rise until it is separated from the weighing surface of the weighing device.

5. The road dust load detection system according to claim 1, characterized in that: In step 2) of the road dust load detection method, the dust collector head is controlled to move along a spiral trajectory.

6. The road dust load detection system according to claim 1, characterized in that: It also includes a distance meter for detecting the distance between the current position and the road shoulder. Before step 1), the distance between the current position and the road shoulder is measured by the distance meter. After the distance reaches a set value, subsequent steps are performed, otherwise a warning is output.

7. The road dust load detection system according to claim 1, characterized in that: The lifting guide unit includes a pair of outer guide rails that slide and guide each other and are used to be fixed on the fixed base plate, and an inner support plate that is fixed on the dust collection base plate. The inner support plate is provided with a fixing hole. After the inner support plate rises to its position, the locking rod is inserted into the corresponding fixing hole to fix the retracted dust collection base plate in the retracted position. The telescopic action of the locking rod is constrained by the limiting hole of the limiting block to a telescopic action along the axial direction. The limiting block is fixedly provided on the fixed base plate.

8. The road dust load detection system according to claim 7, characterized in that: The fixed base plate is provided with a rising position sensor at a corresponding position on the top of the inner support plate; when the dust collecting base plate rises to the retracted position, the inner support plate triggers the rising position sensor, and the rising position sensor outputs a rising position signal indicating that the dust collecting base plate has risen to the retracted position.

9. The road dust load detection system according to claim 8, characterized in that: It also includes a locking sensor, which is triggered to output a locking signal when the locking rod extends out and penetrates the fixing hole to fix the dust collection base plate in the retracted position.

10. A method for detecting road dust load, characterized in that: The method comprises the steps of the road surface dust load detection method in the road surface dust load detection system according to any one of claims 1 to 9.

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