Vehicle-mounted gas production detection device

Abstract

The utility model discloses a vehicle-mounted gas production detection device. The device comprises a wind speed detection assembly, a controller, a power assembly, a gas production pipe and a concentration detection assembly. According to the vehicle-mounted gas production device, the wind speed detection device is arranged to control the rotating speed of the power assembly, so that interference generated in the high-speed running process of a vehicle relative to the passive gas inlet speed of the vehicle-mounted gas production device is eliminated, and the situation that the gas production speed of the vehicle-mounted gas production device is not equal to the passive gas inlet speed when the vehicle runs is avoided; and the formed large particles are accumulated due to inertia, so that the detection result of the concentration of the particles in the gas is more accurate.

Description

Technical Field

[0001] The present disclosure generally relates to the field of environmental gas detection technology. More specifically, the present disclosure relates to a vehicle-mounted gas sampling detection device. Background Art

[0002] As my country attaches more importance to environmental protection, the intensity of environmental protection supervision at all levels has been continuously increased. The phenomenon of enterprises secretly discharging and leaking has been stopped. Low-level production capacity such as scattered coal heating and small workshop processing has been further cleaned up. The contribution of industrial emissions and coal burning to PM2.5 has gradually decreased, making the proportion of dust pollution increasing. In the winter of 2017, the Beijing-Tianjin-Hebei region carried out the most intensive environmental supervision in history, which made the proportion of transmitted haze reach a low level, while local pollution reached about 75%, which further highlighted the local pollution sources. The monitoring, analysis and control of urban dust and traffic dust are imminent.

[0003] The existing vehicle-mounted road dust monitoring system platform monitors the road dust data generated during the driving of taxis through the road dust monitoring system installed in taxis. The TRECAR algorithm is used to calculate the dust situation on the road, and the traffic dust emission factor of the road is calculated based on the speed and weight of the vehicle. The potential dust emissions of various sections of the city are counted to derive the street cleanliness ranking. In the process of road pollution detection, the contribution of traffic road dust to pollution can be accurately calculated.

[0004] The vehicle-mounted road dust monitoring system is equipped with a dust monitoring device with a laser sensor as the core. When the vehicle reaches a certain speed, the monitoring device is turned on to obtain the data of road dust under the vehicle and the urban dust on the roof. According to the data of different time periods and different streets, the GIS platform information is integrated and the data is sent to the cloud server through the wireless communication module. The cloud server forms a data product of the spatiotemporal distribution map of road dust in the jurisdiction according to the model algorithm, providing data support for the distribution, formation and governance of road dust. The hardware of the vehicle-mounted road dust monitoring system is divided into the secondary dust monitoring device under the vehicle and the urban background dust monitoring device on the roof. The data between the two devices are mutually corrected and fitted according to the vehicle speed and vehicle weight. Among them, the particle laser sensor in the detection equipment is a sensor that uses optical methods to detect the dust concentration in the air. In the sensor, a laser emitter and a light sensor intersect. When the airflow with dust passes through the intersection area, reflected light is generated. The image sensor detects the laser beam reflected by the dust, judges the concentration of the dust according to the output strength, and outputs a circuit pulse signal.

[0005] However, the above sensors are mainly used for static scene monitoring. The speed of the fan is fixed, that is, the air intake speed of the sensor is fixed, which cannot meet the application scenario of vehicle-mounted mobile monitoring.

[0006] In view of this, there is an urgent need to provide a vehicle-mounted gas collection detection device to match the gas collection speed with the vehicle speed to avoid the problem of large particle accumulation. Utility Model Content

[0007] In order to at least solve one or more of the technical problems mentioned above, the present disclosure proposes a solution for a vehicle-mounted gas collection and detection device.

[0008] The present disclosure provides a vehicle-mounted gas collection detection device, which includes: a wind speed detection component, a controller, a power component, a gas collection pipe and a concentration detection component. The wind speed detection component is arranged on the inner wall of the gas collection pipe air inlet, and is used to collect wind speed data entering the gas collection pipe and send the wind speed data to the controller; the controller is used to receive the wind speed data, and determine the rotation speed of the power component based on the vehicle speed data and the wind speed data; the power component is arranged in the gas collection pipe, and is used to control the sampling speed of the gas collection pipe; the gas collection pipe is used to collect gas at the sampling speed; the concentration detection component is connected to the gas collection pipe, and is used to detect the concentration of particulate matter in the gas.

[0009] In some embodiments, a fixing member is nested in the gas collection pipe, a through hole is opened in the fixing member along the axial direction of the gas collection pipe, and the power component is nested in the through hole.

[0010] In some embodiments, the fixing member includes a first fixing member and a second fixing member, and the power assembly includes a first power assembly and a second power assembly; the first fixing member and the second fixing member divide the gas collection pipe into an air inlet pipe, an air outlet pipe and a sampling chamber in the middle along the length direction of the gas collection pipe, the air inlet pipe and the air outlet pipe are sealed and covered on the power assembly, and the first power assembly on the first fixing member and the second power assembly on the second fixing member have the same rotation speed to ensure that the air intake speed and the exhaust speed are the same.

[0011] In some embodiments, the second fixing member is close to the gas outlet pipe, and a sampling tube is fixedly disposed on the second fixing member. The sampling tube penetrates the fixing member along the axial direction of the sampling cavity to take out the sample gas from the sampling cavity.

[0012] In some embodiments, a pressure detection component is provided in the sampling cavity, and the pressure detection component is electrically connected to the controller for detecting pressure data in the sampling cavity and transmitting the pressure data to the controller to adjust the rotation speed of the power component.

[0013] In some embodiments, the concentration detection component is connected to the sampling chamber through a sampling tube, and the concentration detection component detects the sample gas.

[0014] In some embodiments, the concentration detection component includes a detection cavity, a laser generator and a photosensor, which are fixed on both sides of the detection cavity. The detection cavity receives the sample gas, the laser generator emits laser into the detection cavity, the laser passes through the sample gas, and the photosensor receives the laser to detect the particle concentration of the sample gas in the detection cavity.

[0015] In some embodiments, a deceleration component is fixed on the inner wall of the sampling chamber, the deceleration component is close to the first fixing member, and the highest point of the deceleration component is greater than the distance from the side wall of the sampling chamber to the central axis to reduce the intake speed.

[0016] In some embodiments, the deceleration assembly includes a plurality of protrusions, the protrusions are arranged at intervals along the length direction of the sampling cavity, and adjacent protrusions are symmetrically arranged along the axis of the sampling cavity.

[0017] In some embodiments, a filter device is provided at the gas inlet of the gas collection pipe, and the filter device is sealably assembled on the gas inlet of the gas collection pipe to filter the gas entering the gas collection pipe.

[0018] In some embodiments, the vehicle speed data is collected by using a vehicle speed detection component, which is electrically connected to a controller. The vehicle speed detection component is disposed on the vehicle body and transmits the detected vehicle speed data to the controller.

[0019] Through the vehicle-mounted gas collection detection device provided above, the disclosed embodiment can control the gas collection speed of the gas collection pipe through the cooperation of the wind speed detection component, the controller and the power component, so that the gas collection speed matches the vehicle speed, avoiding the problem of inaccurate concentration detection caused by the inertial accumulation of large particles. Further, by setting a fixing part, the gas collection pipe is divided into an air inlet pipe, an air outlet pipe and a sampling chamber in the middle while fixing the power component, so that the gas collection speed is controlled by the power component, ensuring that the air inlet speed and the air outlet speed are the same, and at the same time ensuring that the atmospheric pressure in the sampling chamber is the same as the external atmospheric pressure. Furthermore, by setting a vehicle speed detection component to collect vehicle speed data, the vehicle speed data is sent to the controller, and the controller controls the rotation speed of the power component based on the vehicle speed data and the wind speed data, so that the gas collection speed matches the vehicle speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] By reading the detailed description below with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0021] Figure 1 A schematic structural diagram of a vehicle-mounted gas collection and detection device according to an embodiment of the present disclosure is shown;

[0022] Figure 2 A schematic structural diagram of a gas sampling pipe according to an embodiment of the present disclosure is shown;

[0023] Figure 3 A schematic diagram of the external structure of a concentration detection component of an embodiment of the present disclosure is shown;

[0024] Figure 4 A schematic structural diagram of a deceleration assembly according to an embodiment of the present disclosure is shown;

[0025] Figure 5 A structural schematic diagram of another deceleration assembly according to an embodiment of the present disclosure is shown.

[0026] Reference numerals:

[0027] 1. Wind speed detection component;

[0028] 2. Controller;

[0029] 3. Power assembly; 31. First power assembly; 32. Second power assembly;

[0030] 4. Gas sampling pipe; 41. Fixing piece; 411. Through hole; 412. First fixing piece; 413. Second fixing piece; 42. Inlet pipe; 43. Outlet pipe; 44. Sampling chamber; 441. Speed ​​reduction assembly; 4411. Protrusion;

[0031] 5. Concentration detection component; 51. Detection cavity; 52. Laser generator; 53. Light sensor;

[0032] 6. Sampling tube;

[0033] 7. Pressure detection component;

[0034] 8. Filter device. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0036] It should be understood that the terms "include" and "comprising" used in the specification and claims of the present disclosure indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections thereof.

[0037] It should also be understood that the terms used in this disclosure are only for the purpose of describing specific embodiments and are not intended to limit the disclosure. As used in this disclosure and claims, the singular forms of "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It should also be further understood that the term "and / or" used in this disclosure and claims refers to any combination of one or more of the associated listed items and all possible combinations, including these combinations.

[0038] As used in this specification and claims, the term "if" may be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" may be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0039] The specific implementation of the present disclosure is described in detail below with reference to the accompanying drawings.

[0040] Figure 1 A structural schematic diagram of a vehicle-mounted gas collection and detection device according to an embodiment of the present disclosure is shown.

[0041] like Figure 1 As shown, the present disclosure provides a vehicle-mounted gas collection detection device, which includes: a wind speed detection component 1, a controller 2, a power component 3, a gas collection pipe 4 and a concentration detection component 5. The wind speed detection component 1 is arranged on the inner wall of the air inlet of the gas collection pipe 4, and is used to collect wind speed data entering the gas collection pipe 4, and send the wind speed data to the controller 2; the controller 2 is used to receive the wind speed data, and determine the rotation speed of the power component 3 based on the vehicle speed data and the wind speed data; the power component 3 is arranged in the gas collection pipe 4, and is used to control the sampling speed of the gas collection pipe 4; the gas collection pipe 4 is used to collect gas at the sampling speed; the concentration detection component 5 is connected to the gas collection pipe 4, and is used to detect the concentration of particulate matter in the gas.

[0042] In an exemplary embodiment, the vehicle-mounted gas collection detection device can be set at the rear or roof of the vehicle. When the vehicle travels to a certain speed, the vehicle-mounted gas collection detection device is turned on to obtain the dust data of the road surface under the vehicle and the urban dust data on the roof. The wind speed detection component 1 is set at the air inlet of the gas collection pipe 4, and can collect the speed value of the gas passing through the air inlet in real time. The wind speed detection component 1 is connected to the controller 2 by wired or wireless means to transmit the collected wind speed data to the controller 2. On the one hand, the controller 2 receives the wind speed data transmitted from the wind speed detection component 1, and on the other hand, receives the vehicle speed data of the vehicle at this time. The controller 2 compares the wind speed data with the vehicle speed data at the same time, and controls the speed of the power component 3 according to the comparison result. For example, when the vehicle speed value is large and the wind speed value is small, the controller 2 controls the speed of the power component 3 to increase it; when the vehicle speed value is small and the wind speed value is large, the controller 2 controls the speed of the power component 3 to reduce it; and when the vehicle speed value and the wind speed value are the same, the controller 2 controls the speed of the power component 3 to keep it at 100 revolutions per minute. The power assembly 3 is arranged in the gas collection pipe 4. Generally, the power assembly 3 adopts a turbo fan, and the gas passes through the gap between the fan blades. When the turbo fan rotates, the gas collection pipe 4 sucks air inward under the action of the fan, so that the sampling speed can be matched with the vehicle speed, so that the interference of the passive air intake speed of the vehicle-mounted gas collection device generated during high-speed driving can be eliminated, and the gas collection speed of the vehicle-mounted gas collection device and the passive air intake speed when the vehicle is driving are not equal, and the large particles are accumulated due to inertia problems, which leads to a large error in the concentration detection result. The gas collection pipe 4 is a circular tube with openings on both sides. Of course, it can also be a square tube or other styles, which is not limited here. The gas collection pipe 4 is used to accommodate the gas entering the device. It adopts a structure with the same size of openings on both sides, one side is for intake and the other side is for exhaust. In this way, the speed of gas entering and exiting the gas collection pipe 4 is the same, so that the solid particle concentration value of the measured gas is more accurate. The concentration detection component 5 is connected to the gas collection pipe 4, and the sample gas can be taken out from the gas collection pipe 4, and further, the solid particle concentration of the sample gas is detected.

[0043] It can be seen from the detailed description above that the device disclosed in the present invention can control the gas collection speed of the gas collection pipe 4 through the cooperation of the wind speed detection component 1, the controller 2 and the power component 3, so that the gas collection speed matches the vehicle speed, thereby solving the problem of inaccurate concentration detection caused by inertial accumulation of large particles.

[0044] like Figure 1 As shown, preferably, a fixing member 41 is nested in the gas collection pipe 4 , a through hole 411 is opened in the fixing member 41 along the axial direction of the gas collection pipe 4 , and the power assembly 3 is nested in the through hole 411 .

[0045] Specifically, in an implementation scenario, the fixing member 41 disclosed herein is sealed and nested in the gas collection pipe 4. The fixing member 41 is a column extending in the axial direction of the gas collection pipe 4. Further, a through hole 411 is provided on the fixing member 41, and the axis of the through hole 411 is parallel to the axis of the fixing member 41. The fixing member 41 can be fixed in the gas collection pipe 4 by bolts, and the surface of the fixing member 41 column is tightly fitted with the gas collection pipe 4, and no gas passes through, which ensures that the gas in the gas collection pipe 4 is completely controlled by the power assembly 3. Such a design enables the wind speed detection assembly 1 to accurately calculate the volume of gas entering the gas collection pipe 4, thereby making the solid particle concentration of the measured gas more accurate. The power assembly 3 is nested in the through hole 411. It can be seen from the figure that the power assembly 3 has not been assembled into the through hole 411 at this time. The power assembly 3 and the through hole 411 have the same shape and move toward the center point so that the power assembly 3 can be sealed and engaged in the through hole 411. From the above detailed description, it can be seen that the device disclosed in the present invention can not only fix the power component 3 by setting the fixing member 41, but also accurately calculate the volume of gas entering the gas collection pipe 4, so as to more accurately calculate the solid particle concentration value of the gas.

[0046] Figure 2 A schematic structural diagram of a gas production pipe according to an embodiment of the present disclosure is shown.

[0047] like Figure 2 As shown, preferably, the fixing member 41 includes a first fixing member 412 and a second fixing member 413, and the power assembly 3 includes a first power assembly 31 and a second power assembly 32; the first fixing member 412 and the second fixing member 413 divide the gas collection pipe 4 into an air inlet pipe 42, an air outlet pipe 43 and a sampling chamber 44 in the middle along the length direction of the gas collection pipe 4, the air inlet pipe 42 and the air outlet pipe 43 are sealed and covered on the power assembly 3, and the first power assembly 31 on the first fixing member 412 and the second power assembly 32 on the second fixing member 413 have the same rotation speed to ensure that the intake speed and the exhaust speed are the same.

[0048] Specifically, the fixing member 41 disclosed in the present invention may have two, for example, a first fixing member 412 and a second fixing member 413; the first fixing member 412 and the second fixing member 413 divide the gas sampling pipe 4 into an air inlet pipe 42, an air outlet pipe 43 and a sampling chamber 44 in the middle along its length direction. In an implementation scenario, the air inlet pipe 42 and the air outlet pipe 43 may adopt a square or circular tube body, which just covers the power assembly 3, and the air inlet pipe 42 and the air outlet pipe 43 are nested in the through hole 411 together with the power assembly 3, that is, the tube shape of the air inlet pipe 42 and the air outlet pipe 43 is adapted to the outer edge shape of the power assembly 3, and a part of the tube body of the air inlet pipe 42 and the air outlet pipe 43 is inserted into the through hole 411. For example, if the outer edge of the power assembly 3 is circular, the shapes of the inlet pipe 42 and the outlet pipe 43 are preferably circular; if the outer edge of the power assembly 3 is square, the shapes of the inlet pipe 42 and the outlet pipe 43 are preferably square, which ensures that the inlet and outlet are all controlled by the power assembly 3. Of course, in another implementation scenario, the inlet pipe 42, the outlet pipe 43 and the sampling chamber 44 can use pipes with the same cross section.

[0049] like Figure 2 As shown, preferably, the second fixing member 413 is close to the gas outlet pipe 43 , and a sampling tube 6 is fixedly provided on the second fixing member 413 , and the sampling tube 6 axially penetrates the second fixing member 413 along the sampling cavity 44 to take out the sample gas from the sampling cavity 44 .

[0050] Specifically, in one implementation scenario, the first fixing member 412 and the second fixing member 413 are respectively arranged on both sides of the sampling cavity 44, and the radial dimensions of the tube bodies of the air inlet pipe 42 and the air outlet pipe 43 are smaller than the radial dimensions of the sampling cavity 44. At this time, the cross-sectional area of ​​the second fixing member 413 is larger than the cross-sectional area of ​​the through hole 411, and the sampling tube 6 is arranged on the second fixing member 413 except for the through hole 411. In other words, a through hole is also arranged on the second fixing member 413, and the sampling tube 6 passes through the through hole and extends into the sampling cavity 44, so that the gas in the sampling cavity 44 can be discharged through the sampling tube 6. With such a design, it is ensured that the sample gas is smoothly taken out of the sampling cavity 44, and the speed of the gas discharged from the air outlet pipe 43 is not affected, so that the air inlet speed and the air outlet speed are balanced. If the air inlet speed and the air outlet speed are different, the gas concentration in the sampling cavity 44 may change.

[0051] like Figure 2 As shown, preferably, a pressure detection component 7 is provided in the sampling chamber 44 , and the pressure detection component 7 is connected to the controller 2 for detecting the pressure data in the sampling chamber 44 , and transmitting the pressure data to the controller 2 to adjust the rotation speed of the power component 3 .

[0052] Specifically, the first power assembly 31 and the second power assembly 32 may have different rotation speeds during a long period of rotation. At this time, it is necessary to detect the pressure data in the sampling chamber 44 through the pressure detection assembly 7. When the pressure in the sampling chamber 44 increases, it means that the first power assembly 31 has a higher rotation speed than the second power assembly 32. In this case, the pressure detection assembly 7 sends pressure data to the controller 2. The controller 2 adjusts the rotation speed of the first power assembly 31 and / or the second power assembly 32 according to the pressure data so that their rotation speeds are the same, and then the sampling chamber 44 restores the standard atmospheric pressure; when the pressure in the sampling chamber 44 decreases, it means that the first power assembly 31 has a lower rotation speed than the second power assembly 32. In this case, the pressure detection assembly 7 sends pressure data to the controller 2. The controller 2 adjusts the rotation speed of the first power assembly 31 and / or the second power assembly 32 according to the pressure data so that their rotation speeds are the same, and then the sampling chamber 44 restores the standard atmospheric pressure. In one embodiment, the pressure detection assembly 7 is wirelessly connected to the controller 2. The device disclosed herein can monitor the pressure of the sampling chamber 44 in real time through the pressure detection component 7 in the sampling chamber 44, and adjust the rotation speed of the first power component 31 and the second power component 32, thus ensuring that the detection value of the gas concentration is more accurate.

[0053] Figure 3 A schematic diagram of the external structure of a concentration detection component of an embodiment of the present disclosure is shown.

[0054] like Figure 3 As shown, preferably, the concentration detection component 5 is connected to the sampling chamber 44 through the sampling tube 6, and the concentration detection component 5 detects the sample gas.

[0055] Specifically, the sampling tube 6 passes through the second fixing member 413, one end of which extends into the sampling cavity 44, and the other end is connected to the concentration detection component 5, so that the gas in the sampling cavity 44 can be transported to the concentration detection component 5 through the sampling tube 6. In one embodiment, the sampling tube 6 extends into the middle position of the sampling cavity 44, so that the sample gas taken better meets the requirements.

[0056] like Figure 3 As shown, preferably, the concentration detection component 5 includes a detection chamber 51, a laser generator 52 and a photosensor 53. The laser generator 52 and the photosensor 53 are fixed on both sides of the detection chamber 51. The detection chamber 51 receives the sample gas. The laser generator 52 emits a laser to the detection chamber 51. The laser passes through the sample gas. The photosensor 53 receives the optical signal of the laser passing through the sample gas to detect the particle concentration of the sample gas in the detection chamber 51.

[0057] Specifically, in one embodiment, the detection chamber 51 is a circular or square containing chamber, which is used to receive the sample gas taken out by the sampling tube 6 extending into the sampling chamber 44. The laser generator 52 and the photosensitive sensor 53 are arranged on both sides of the detection chamber 51. The laser generator 52 can emit laser light, and the laser light passes through the detection chamber 51. Under the action of the sample gas, the energy of the laser light will change, and the light signal of this change will be received by the photosensitive sensor 53, and the photosensitive sensor 53 will convert the light signal into an electrical signal and send it to the controller 2, and the controller 2 will calculate the concentration of the sample gas and present the concentration value on the display.

[0058] Figure 4 A schematic diagram of the structure of a deceleration assembly according to an embodiment of the present disclosure is shown. Figure 5 A structural schematic diagram of another deceleration assembly according to an embodiment of the present disclosure is shown.

[0059] like Figure 4 and 5 As shown, preferably, a deceleration component 441 is fixed on the inner wall of the sampling chamber 44, the deceleration component 441 is close to the first fixing member 412, and the highest point of the deceleration component 441 is greater than the distance from the side wall of the sampling chamber 44 to the central axis to reduce the intake speed. The deceleration component 441 includes a plurality of protrusions 4411, the protrusions 4411 are arranged at intervals along the length direction of the sampling chamber 44, and adjacent protrusions 4411 are symmetrically arranged along the axis of the sampling chamber 44.

[0060] Specifically, the external gas enters the sampling chamber 44 under the action of the turbine fan of the power component 3. Therefore, when the gas enters the sampling chamber 44, it will have a certain speed. If the speed of the gas is too large, it may affect the sampling speed, and then affect the concentration of the gas. Therefore, a deceleration component 441 is fixedly provided on the inner wall of the sampling chamber 44 close to the first fixing member 412. When the gas reaches the middle of the sampling chamber 44, the gas speed meets the sampling requirements. At this time, the sample gas coming out of the sampling tube 6 basically eliminates the influence of speed. In one embodiment, the deceleration component 441 includes a plurality of protrusions, wherein the protrusions are hollow ramp plates, and the plurality of ramp plates are arranged at intervals along the length direction of the sampling chamber 44, such as Figure 4 As shown, there can be multiple ramps here. In order to save space, we prefer two. The two ramps are respectively arranged above and below the inner wall of the sampling chamber 44, and the height of the ramp is slightly higher than the distance from the side wall of the sampling chamber 44 to the central axis. In another embodiment, the protrusion 4411 is a partition, and the partition forms a 90° angle with the inner wall of the sampling chamber 44. A plurality of partitions are arranged at intervals along the length direction of the sampling chamber 44, wherein two adjacent partitions are respectively arranged above and below the inner wall of the sampling chamber 44, and the height of the partition is slightly higher than the distance from the side wall of the sampling chamber 44 to the central axis. The present disclosure can reduce the flow velocity of the gas in the sampling chamber 44 by setting a deceleration component 441, thereby reducing the influence of the flow velocity on the concentration detection.

[0061] like Figure 1 As described above, preferably, a filter device 8 is provided at the air inlet of the gas sampling pipe 4 , and the filter device 8 is sealably assembled on the air inlet of the gas sampling pipe 4 to filter the gas entering the gas sampling pipe 4 .

[0062] Specifically, the filter device 8 is disposed at the air inlet to filter large leaves or cotton wool to ensure the cleanliness of the sampling chamber 44 .

[0063] Preferably, the vehicle speed data is collected by using a vehicle speed detection component (not shown in the figure), the vehicle speed detection component is connected to the controller 2, the vehicle speed detection component is arranged on the vehicle body, and transmits the detected vehicle speed data to the controller 2.

[0064] Specifically, the vehicle speed component is arranged on the vehicle body to collect real-time monitoring vehicle speed data and send the vehicle speed data to the controller 2. The controller 2 controls the rotation speed of the power component 3 based on the vehicle speed data and the wind speed data so that the gas collection speed matches the vehicle speed.

[0065] Although multiple embodiments of the present disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art may think of many changes, modifications, and alternatives without departing from the thought and spirit of the present disclosure. It should be understood that in the process of practicing the present disclosure, various alternatives to the embodiments of the present disclosure described herein may be adopted. The attached claims are intended to define the scope of protection of the present disclosure, and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A vehicle-mounted gas collection detection device, characterized in that: include: Wind speed detection components, controllers, power components, gas sampling pipes and concentration detection components, The wind speed detection component is arranged on the inner wall of the air inlet of the air sampling pipe, and is used to collect the wind speed data entering the air sampling pipe and send the wind speed data to the controller; The controller is used to receive the wind speed data and determine the rotation speed of the power assembly based on the vehicle speed data and the wind speed data; The power assembly is arranged in the gas sampling pipe and is used to control the sampling speed of the gas sampling pipe; The gas sampling pipe is used to collect gas at the sampling speed; The concentration detection component is connected to the gas sampling pipe and is used to detect the concentration of particulate matter in the gas.

2. The vehicle-mounted gas sampling detection device according to claim 1, characterized in that: A fixing piece is nested in the gas collection pipe, and a through hole is opened in the fixing piece along the axial direction of the gas collection pipe, and the power assembly is nested in the through hole.

3. The vehicle-mounted gas sampling detection device according to claim 2, characterized in that: The fixing member includes a first fixing member and a second fixing member, and the power assembly includes a first power assembly and a second power assembly; the first fixing member and the second fixing member divide the gas collection pipe into an air inlet pipe, an air outlet pipe and a sampling chamber in the middle along the length direction of the gas collection pipe, the air inlet pipe and the air outlet pipe are sealed and covered on the power assembly, and the first power assembly on the first fixing member and the second power assembly on the second fixing member have the same rotation speed to ensure that the intake speed and the exhaust speed are the same.

4. The vehicle-mounted gas sampling detection device according to claim 3, characterized in that: The second fixing member is close to the gas outlet pipe, and a sampling tube is fixedly arranged on the second fixing member. The sampling tube penetrates the fixing member along the axial direction of the sampling cavity and is used for taking out sample gas from the sampling cavity.

5. The vehicle-mounted gas sampling detection device according to claim 3, characterized in that: A pressure detection component is provided in the sampling cavity, and the pressure detection component is electrically connected to the controller for detecting pressure data in the sampling cavity and transmitting the pressure data to the controller to adjust the rotation speed of the power component.

6. The vehicle-mounted gas sampling detection device according to claim 4, characterized in that: The concentration detection component is connected to the sampling cavity through the sampling tube, and the concentration detection component detects the sample gas.

7. The vehicle-mounted gas sampling detection device according to claim 6, characterized in that: The concentration detection component includes a detection cavity, a laser generator and a photosensor. The laser generator and the photosensor are fixed on both sides of the detection cavity. The detection cavity receives the sample gas. The laser generator emits laser to the detection cavity. The laser passes through the sample gas. The photosensor receives the laser to detect the particle concentration of the sample gas in the detection cavity.

8. The vehicle-mounted gas sampling detection device according to claim 3, characterized in that: A deceleration component is fixedly arranged on the inner wall of the sampling cavity, the deceleration component is close to the first fixing member, and the highest point of the deceleration component is greater than the distance from the side wall of the sampling cavity to the central axis, so as to reduce the air intake speed.

9. The vehicle-mounted gas sampling detection device according to claim 8, characterized in that: The deceleration assembly comprises a plurality of protrusions, the protrusions are arranged at intervals along the length direction of the sampling cavity, and adjacent protrusions are symmetrically arranged along the axis of the sampling cavity.

10. The vehicle-mounted gas sampling detection device according to claim 1, characterized in that: A filter device is provided at the gas inlet of the gas sampling pipe. The filter device is sealed and assembled on the gas inlet of the gas sampling pipe to filter the gas entering the gas sampling pipe.

11. The vehicle-mounted gas sampling detection device according to claim 1, characterized in that: The vehicle speed data is collected by using a vehicle speed detection component, which is electrically connected to the controller. The vehicle speed detection component is arranged on the vehicle body and transmits the detected vehicle speed data to the controller.

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