Vehicle exhaust continuous monitoring device

Abstract

The present invention relates to a vehicle-mounted continuous monitoring device for motor vehicle exhaust, comprising a housing, a smoke channel, a transmitting assembly and a receiving assembly, wherein the transmitting assembly comprises an incident channel connected to the smoke channel, wherein a transmitting end mounting hole, a transmitting light source, a first wind curtain and a transmitting end connecting hole are sequentially arranged in the incident channel; the receiving assembly comprises a receiving channel connected to the smoke channel, wherein a receiving end connecting hole, a second wind curtain, a photoelectric converter and a receiving end mounting hole are sequentially arranged in the receiving channel; the blowing direction of the first and second wind curtains is perpendicular to the smoke flow direction; the first guide portion is constructed outside the transmitting end mounting hole and the receiving end mounting hole, and the first guide portion guides the airflow of the first wind curtain and the second wind curtain, so that the air pressure outside the orifices of the transmitting end mounting hole and the receiving end mounting hole is lower than the air pressure inside the respective corresponding orifices. The present invention can facilitate continuous online monitoring of vehicle-mounted exhaust, and effectively solves the problem of smoke pollution to the transmitting light source and the photoelectric converter.

Description

Technical Field

[0001] The invention relates to the technical field of exhaust gas monitoring, and in particular to a vehicle-mounted continuous monitoring device for exhaust gas of a motor vehicle. Background Art

[0002] At present, with the continuous increase in the number of motor vehicles, exhaust emission pollution monitoring has become a key problem to be solved. At present, the supervision of motor vehicles, especially diesel vehicles with serious exhaust emissions, is a top priority. All regions are constantly establishing and improving a joint supervision and law enforcement model, that is, promoting a joint supervision and law enforcement model in which the ecological environment department detects and collects evidence, the public security traffic management department implements penalties, and the transportation department supervises and repairs. All localities strengthen road inspections, remote sensing monitoring, and household supervision sampling, and conduct random inspections of key places where vehicles are concentrated, such as logistics parks, industrial parks, and cargo distribution centers, as well as enterprises.

[0003] The existing referenceable Chinese invention patent with authorization announcement number CN205192931U discloses a measurement optical channel of a transmission type smoke meter, which mainly includes an exhaust channel, a transmitting unit, a receiving unit, and an anti-pollution unit, wherein the transmitting unit includes a transmitting end glass and a lens, and the receiving unit includes a receiving end glass and a lens. The anti-pollution unit can continuously flush the transmitting end glass and the receiving end glass with compressed air to keep them clean. Although the device of this invention can have a certain anti-pollution effect to a certain extent, its anti-pollution ability is limited and it cannot work for a long time. The transmitting end glass and the high-cost lens will still be contaminated, affecting the accuracy of exhaust monitoring. For this reason, in working conditions and actual applications, the device is used to conduct random inspections of diesel vehicle exhaust. Real-time and accurate monitoring of diesel vehicle exhaust emissions cannot be achieved through random inspections alone.

[0004] Based on this, a new on-board continuous monitoring device for exhaust gas of motor vehicles is proposed. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a vehicle-mounted continuous monitoring device for motor vehicle exhaust, which can be loaded on a motor vehicle to facilitate continuous online monitoring of exhaust emissions and effectively solve the problem of smoke pollution to the emitting light source and the photoelectric converter.

[0006] The above-mentioned invention object of the present invention is achieved through the following technical scheme: a vehicle-mounted continuous monitoring device for exhaust gas of a motor vehicle, comprising:

[0007] The flue gas channel is a hollow long tube with an exhaust gas inlet pipe in the middle of the long tube;

[0008] An emission component, comprising an incident channel connected to the smoke channel, wherein an emission end mounting hole, an emission light source, a first air curtain and an emission end connecting hole are sequentially arranged in the incident channel from an end away from the smoke channel to the smoke channel, and the emission light source is built into the emission end mounting hole;

[0009] A receiving assembly, comprising a receiving channel connected to the other end of the smoke channel relative to the transmitting assembly, wherein a receiving end communication hole, a second air curtain, a photoelectric converter and a receiving end mounting hole are sequentially arranged in the receiving channel from one end close to the smoke channel to the end far from the smoke channel, wherein the photoelectric converter is built into the receiving end mounting hole;

[0010] A housing for encapsulating the smoke channel, the transmitting assembly, and the receiving assembly;

[0011] The central axes of the emitting light source and the photoelectric converter are both collinear with the central axis of the smoke channel, and the blowing directions of the first and second air curtains are perpendicular to the smoke flow direction;

[0012] A first air guide portion is constructed outside the transmitting end mounting hole and the receiving end mounting hole. The first air guide portion is located inside the first and second air curtains. The first air guide portion guides the airflow of the first and second air curtains so that the air pressure outside the orifices of the transmitting end mounting hole and the receiving end mounting hole is lower than the air pressure inside the corresponding orifices.

[0013] By adopting the above technical solution, the airflow formed by the first wind curtain and the second wind curtain is perpendicular to the flow direction of the smoke, so that the emitting light source and the photoelectric converter can be protected from being polluted by the smoke. However, the airflow formed by the first wind curtain and the second wind curtain has a deflected airflow, and the deflected airflow will blow into the mounting hole of the transmitting end where the emitting light source is located and into the mounting hole of the receiving end where the photoelectric converter is located, so that smoke is easily introduced, causing pollution to the emitting light source and the photoelectric converter. The first guide part can block the deflected airflow to prevent it from blowing directly to the mounting hole of the transmitting end and the mounting hole of the receiving end; at the same time, the airflow passing through the first guide part will be accelerated, so that the air pressure outside the mounting hole of the transmitting end and the mounting hole of the receiving end is lower than the air pressure inside the hole, making it difficult for smoke to pollute the emitting light source and the photoelectric converter.

[0014] In a preferred example, the present invention can be further configured as follows: the launching assembly includes a launching end seat, the internal structure of the launching end seat forms a first chamber and the launching end mounting hole, the first wind curtain is arranged in the first chamber, the first chamber is connected to the smoke channel, and the launching end mounting hole and the first chamber are jointly constructed to form the incident channel.

[0015] In a preferred example, the present invention can be further configured as follows: the receiving component includes a receiving end seat, the internal structure of the receiving end seat forms a second chamber and the receiving end mounting hole, the second wind curtain is arranged in the second chamber, the second chamber is connected to the smoke channel, and the receiving end mounting hole and the second chamber are jointly constructed to form the incident channel.

[0016] In a preferred example, the present invention can be further configured as follows: the first guide portion has a first guide slope inclined along the airflow direction formed by the first wind curtain and the second wind curtain, and the first guide slope blocks the deflected airflow in the airflow formed by the first wind curtain and the second wind curtain that blows toward the transmitting end mounting hole and the receiving end mounting hole.

[0017] By adopting the above technical solution, the first guide slope can block the deflected airflow from blowing directly to the transmitting end mounting hole and the receiving end mounting hole, avoiding the introduction of smoke, and effectively ensuring that the transmitting light source and the photoelectric converter are not contaminated. The first guide slope can accelerate the airflow flow speed at the transmitting end mounting hole and the receiving end mounting hole, so that the air pressure outside the hole is lower than the air pressure inside the hole, forming an internal and external air pressure difference, thereby preventing smoke from entering the hole.

[0018] In a preferred example, the present invention may be further configured as follows: a first notch is provided at the end of the first guide slope.

[0019] By adopting the above technical solution, the setting of the first gap can ensure the passage of airflow, avoid turbulence, and ensure that smoke is discharged from the smoke channel normally through the airflow.

[0020] In a preferred example, the present invention can be further configured as follows: a second guide portion is constructed outside the transmitting end connecting hole and the receiving end connecting hole, the second guide portion is located inside the first and second wind curtains, and the second guide portion guides the airflow of the first wind curtain and the second wind curtain so that the air pressure outside the orifices of the transmitting end connecting hole and the receiving end connecting hole is lower than the air pressure inside the corresponding orifices.

[0021] By adopting the above technical solution, the airflow formed by the first wind curtain and the second wind curtain is perpendicular to the flow direction of the smoke. However, the airflow formed by the first wind curtain and the second wind curtain has a deflected airflow, and the deflected airflow will blow toward the transmitting end connecting hole and the receiving end connecting hole, thereby easily blocking the smoke from entering the exhaust air duct. The second guide part is set to block the deflected airflow to prevent it from directly blowing toward the transmitting end connecting hole and the receiving end connecting hole; at the same time, the airflow passing through the second guide part will be accelerated, thereby causing the air pressure outside the transmitting end connecting hole and the receiving end connecting hole to be lower than the air pressure inside the hole, so that the smoke can smoothly enter the exhaust air duct, avoid the retention of smoke in the long tube, and ensure the detection accuracy.

[0022] In a preferred example, the present invention can be further configured as follows: the second guide portion has a second guide slope inclined along the airflow direction formed by the first wind curtain and the second wind curtain, and the second guide slope blocks the deflected airflow in the airflow formed by the first wind curtain and the second wind curtain that blows toward the transmitting end connecting hole and the receiving end connecting hole; preferably, the second guide slope is a curved surface.

[0023] By adopting the above technical solution, the second guide part has a second guide slope, which can block the deflected airflow and at the same time accelerate the airflow velocity outside the transmitting end connecting hole and the receiving end connecting hole, so that the transmitting end connecting hole and the receiving end connecting hole form an air pressure difference between the hole and the outside of the hole, so that the smoke in the long tube can smoothly enter the smoke exhaust channel; the second guide slope is a curved surface, which can make the airflow flow smoothly, and the airflow passing through the curved surface can be concentrated in the middle to avoid causing airflow turbulence.

[0024] In a preferred example, the present invention may be further configured as follows: a second notch is provided at the end of the second guide slope.

[0025] By adopting the above technical solution, the second notch can ensure the ventilation volume of the exhaust air duct and avoid blocking the airflow.

[0026] In a preferred example, the present invention can be further configured as follows: the first air curtain and the second air curtain have the same structure and both include:

[0027] An exhaust air duct, which passes through the corresponding chamber in a direction perpendicular to the flow direction of the smoke;

[0028] a fan disposed at one end of the exhaust air duct; and

[0029] The exhaust pipe is installed at the other end of the exhaust air duct relative to the fan.

[0030] In a preferred example, the present invention can be further configured as follows: the housing includes:

[0031] case;

[0032] A first cover plate and a second cover plate, the first cover plate and the second cover plate are arranged opposite to each other, and the first cover plate is closer to the fan than the second cover plate;

[0033] The first cover plate is provided with a plurality of air inlet holes, and the second cover plate is provided with an assembly hole for allowing the exhaust gas inlet pipe to extend out of the shell.

[0034] By adopting the above technical solution, a plurality of air inlet holes are provided on the first cover plate, so that the air inlet speed in the shell can be increased to meet the air inlet volume required by the fan.

[0035] In summary, the present invention includes the following beneficial technical effects:

[0036] 1. The present invention abandons the lens in the structural design. Under the condition of meeting the detection requirements, the method of abandoning the lens can solve the pollution of the lens by smoke in the traditional device. The wind curtain and the guide part can overcome the problem of the deflected airflow in the airflow of the wind curtain, greatly improve the anti-pollution ability of the emitting light source and the photoelectric converter, and improve the accuracy of exhaust gas detection;

[0037] 2. The volume of the device of the present invention is reduced, and continuous vehicle-mounted monitoring can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 The figure is a schematic diagram of the appearance and structure of a vehicle-mounted continuous monitoring device for exhaust gas of a motor vehicle according to an embodiment of the present invention.

[0039] Figure 2 It is a cross-sectional view of a vehicle-mounted continuous monitoring device for exhaust gas of a motor vehicle according to an embodiment of the present invention.

[0040] Figure 3 It is a side view of the vehicle-mounted continuous monitoring device for exhaust gas of a motor vehicle according to an embodiment of the present invention, omitting the outer shell.

[0041] Figure 4 yes Figure 3 Cross-section along AA direction.

[0042] Figure 5 It is a cross-sectional view of the vehicle-mounted continuous monitoring device for exhaust gas of a motor vehicle according to an embodiment of the present invention, omitting the outer shell.

[0043] Figure 6 It is a schematic diagram of the principle that there is a biased airflow in the airflow formed by the fan of the on-board continuous monitoring device for motor vehicle exhaust gas in an embodiment of the present invention.

[0044] Figure 7 It is a cross-sectional view showing the structure of the first guide part and the second guide part of the on-board continuous monitoring device for exhaust gas of a motor vehicle according to an embodiment of the present invention.

[0045] Figure 8 It is a schematic diagram of the structure of the transmitting end seat of the vehicle-mounted continuous monitoring device for motor vehicle exhaust gas according to an embodiment of the present invention.

[0046] Fig. 9 It is a schematic diagram of an explosion of a vehicle-mounted continuous monitoring device for exhaust gas of a motor vehicle according to an embodiment of the present invention.

[0047] In the figure, 1, shell; 11, shell; 111, threaded hole; 12, first cover plate; 121, air inlet hole; 13, second cover plate; 131, positioning hole; 132, assembly hole; 133, connection hole; 2, smoke channel; 21, long tube; 22, exhaust gas inlet pipe; 23, mounting pipe; 3, launch assembly; 30, launch end seat; 301, first chamber; 302, mounting ear; 303, positioning groove; 31, launch end mounting hole; 32, launch light source; 33, first wind curtain; 331 , exhaust air duct; 332, fan; 333, exhaust pipe; 34, transmitting end connecting hole; 4, receiving component; 40, receiving end seat; 401, second chamber; 41, receiving end connecting hole; 42, second wind curtain; 43, photoelectric converter; 44, receiving end mounting hole; 5, right-angle mounting plate; 6, first guide part; 61, first body; 62, first guide slope; 63, first notch; 7, second guide part; 71, second body; 72, second guide slope; 73, second notch. DETAILED DESCRIPTION

[0048] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0049] refer to Figure 1 and Figure 2 The present invention discloses a vehicle-mounted continuous monitoring device for exhaust gas of a motor vehicle, the device comprising a housing 1, a smoke passage 2 encapsulated inside the housing 1, a transmitting component 3 and a receiving component 4. The housing 1 here is mainly used for vehicle-mounted installation and protection of various internal components, and encapsulation refers to hiding the various components in the housing 1. In the embodiment of the present invention, neither the transmitting component 3 nor the receiving component 4 is provided with a lens, and the design in the smoke passage 2 and the structure ensures that the detection light can meet the detection requirements. Two right-angle mounting plates 5 can be fixedly installed on both sides of the housing 1 to facilitate fastening to the vehicle body.

[0050] refer to Figure 3 The flue gas passage 2 includes a hollow long tube 21, and an exhaust gas intake pipe 22 is installed in the middle of the long tube 21. The exhaust gas intake pipe 22 is connected to the exhaust pipe of the diesel vehicle, so that the exhaust gas of the diesel vehicle can enter the long tube 21 for exhaust gas detection, and at the same time, the normal discharge of the exhaust gas of the diesel vehicle can be ensured. A mounting pipe 23 is also constructed on the long tube 21, and the mounting pipe 23 is connected to the inside of the long tube 21. A temperature sensor can be installed inside the mounting pipe 23 to detect the temperature of the flue gas in the long tube 21 in real time.

[0051] refer to Figure 2 and Figure 4The emitting assembly 3 includes an incident channel, which is connected to one end of the long tube 21. The incident channel is provided with an emitting end mounting hole 31, an emitting light source 32, a first wind curtain 33 and an emitting end connecting hole 34 in sequence from the end away from the long tube 21 to the end of the long tube 21. The emitting light source 32 is installed in the emitting end mounting hole 31, and a distance is left between the emitting light source 32 and the opening of the emitting end mounting hole 31; the emitting end connecting hole 34 connects the long tube 21 and the incident channel.

[0052] Continue to refer Figure 2 and Figure 4 The receiving component 4 includes a receiving channel, which is connected to the other end of the long tube 21 relative to the transmitting component 3. The receiving channel is provided with a receiving end communication hole 41, a second wind curtain 42, a photoelectric converter 43 and a receiving end mounting hole 44 in sequence from one end close to the long tube 21 to the other end away from the long tube 21. Among them, the photoelectric converter 43 is installed in the receiving end mounting hole 44, and a distance is left between the photoelectric converter 43 and the opening of the receiving end mounting hole 44; the receiving end communication hole 41 connects the long tube 21 and the receiving channel.

[0053] Continue to refer Figure 2 and Figure 4 The transmitting end mounting hole 31, the transmitting light source 32, the transmitting end connecting hole 34, the receiving end connecting hole 41, the photoelectric converter 43 and the receiving end mounting hole 44 are multi-point collinear, and their connecting line coincides with the central axis of the long tube 21. The transmitting light source 32 emits a detection beam, which is received by the photoelectric converter 43, thereby completing the detection of the exhaust gas entering the long tube 21.

[0054] Continue to refer Figure 2 and Figure 4 The blowing directions (airflow directions) of the first wind curtain 33 and the second wind curtain 42 are perpendicular to the flow direction of the exhaust gas, so that the smoke entering the incident channel and the receiving channel can be discharged. The smoke cannot enter the transmitting end mounting hole 31 and the receiving end mounting hole 44 through the action of the first wind curtain 33 and the second wind curtain 42, thereby not causing pollution to the emitting light source 32 and the photoelectric converter 43.

[0055] refer to Figure 4, more specifically, in this embodiment, the transmitting assembly 3 includes a transmitting end seat 30, which is roughly square or quasi-square, and of course, can also be irregular. Accordingly, the shape of the transmitting end seat 30 can be adaptively designed according to the specifications of the actual installation space. The above is only an exemplary description and does not limit the shape of the transmitting end seat 30. The transmitting end seat 30 can be formed by a mold or by 3D printing technology. The internal structure of the transmitting end seat 30 is formed with a first chamber 301, a concentric transmitting end mounting hole 31 and a transmitting end connecting hole 34, the transmitting end mounting hole 31 and the transmitting end connecting hole 34 are both connected to the first chamber 301, and the cross section of the first chamber 301 is roughly circular. Among them, the first wind curtain 33 is arranged in the first chamber 301, and the transmitting end mounting hole 31, the first chamber 301 and the transmitting end connecting hole 34 together form the above-mentioned incident channel.

[0056] refer to Figure 4 The receiving assembly 4 includes a receiving end seat 40, which is roughly square or quasi-square in shape. Of course, it can also be an irregular shape. Accordingly, the shape of the receiving end seat 40 can be adaptively designed according to the specifications of the actual installation space. The above is only an exemplary description and does not limit the shape of the receiving end seat 40. The receiving end seat 40 can be formed by a mold or made by 3D printing technology. The internal structure of the receiving end seat 40 is formed with a second chamber 401, a concentric receiving end connecting hole 41 and a receiving end mounting hole 44. The receiving end connecting hole 41 and the receiving end mounting hole 44 are both connected to the second chamber 401, and the cross-section of the second chamber 401 is roughly circular. Among them, the second air curtain 42 is arranged in the second chamber 401, and the receiving end connecting hole 41, the second chamber 401 and the receiving end mounting hole 44 together form the above-mentioned receiving channel.

[0057] In the embodiment of the present invention, the first air curtain 33 and the second air curtain 42 can form a negative pressure area in the first chamber 301 and the second chamber 401 to guide the flow of smoke and discharge the smoke in the long tube 21, while reducing the pollution of the smoke to the emitting light source 32 and the photoelectric converter 43.

[0058] Regarding the air curtain structure, the following detailed description shows that the first air curtain 33 and the second air curtain 42 have the same structure. In the following description, the same or similar structures included in the first air curtain 33 and the second air curtain 42 are represented by the same names and reference numerals.

[0059] refer to Figure 4 and Figure 5, the first wind curtain 33 and the second wind curtain 42 each include an exhaust air duct 331, a fan 332 and an exhaust pipe 333. The exhaust air duct 331 is formed on the transmitting end seat 30 and the receiving end seat 40 to penetrate the first chamber 301 and the second chamber 401 perpendicular to the direction of smoke flow. The shape of the exhaust air duct 331 is preferably set to be a circular tube. The transmitting end seat 30 and the receiving end seat 40 are configured with a mounting groove 334 on one side of the blowing port, and the fan 332 is embedded in the mounting groove 334, and the four corners are tightened by fasteners such as bolts. The exhaust pipe 333 is installed at the air outlet of the exhaust air duct 331 and is sealed and connected to the exhaust air duct 331.

[0060] refer to Figure 5 and Figure 6 The airflow formed by the fan 332 exhausts smoke along the exhaust duct 331. Taking the transmitting end as an example, the airflow does not flow entirely in a straight line, but will form a deflected airflow a toward the transmitting end mounting hole 31 and a deflected airflow b toward the transmitting end connecting hole 34. The deflected airflow a will introduce smoke into the transmitting end mounting hole 31, causing pollution to the transmitting light source 32; and the deflected airflow b will confront the smoke flow at the transmitting end connecting hole 34, causing the smoke flow in the long tube 21 to be unable to smoothly enter the exhaust duct 331.

[0061] refer to Figure 7 Based on this phenomenon, a first guide portion 6 is constructed outside the transmitting end mounting hole 31 and the receiving end mounting hole 44. The function of the first guide portion 6 is to block the deflected airflow a from blowing toward the transmitting end mounting hole 31 and the receiving end mounting hole 44, so that the air pressure inside the orifices of the transmitting end mounting hole 31 and the receiving end mounting hole 44 is higher than the air pressure outside the orifices. Combined with the guidance of the first guide portion 6, the smoke flow cannot enter the transmitting end mounting hole 31 and the receiving end mounting hole 44.

[0062] Continue to refer Figure 7 and Figure 8 , the structures and principles of the first air guide part 6 at the transmitting end mounting hole 31 and the receiving end mounting hole 44 are the same or similar. In the following description, the same or similar structures included in the first air guide part 6 at the transmitting end mounting hole 31 and the receiving end mounting hole 44 are represented by the same names and reference numbers. Specifically, the first air guide part 6 at the transmitting end is taken as an example for explanation: the first air guide part 6 includes a first body 61, and the first body 61 is formed by the orifice of the transmitting end mounting hole 31 extending outward along the emission direction of the detection light, and the side facing away from the fan 332 is constructed with an arc groove connected to the transmitting end mounting hole 31, and the side facing the fan 332 is constructed to form a first guide slope 62. Preferably, the extended end of the first body 61 is arc-shaped and is a minor arc. From a cross-sectional perspective, the minor arc is a part of the arc presented by the inner wall of the exhaust air duct 331 (reference Figure 3). Preferably, a first notch 63 is provided at the extended end of the first body 61. The first guide slope 62 can guide the deflected airflow a to prevent the deflected airflow a from blowing into the launch end mounting hole 31. At the same time, it can speed up the airflow speed outside the launch end mounting hole 31, so that the air pressure outside the launch end mounting hole 31 is lower than the air pressure inside the hole; the setting of the first notch 63 can ensure that the airflow guided by the first guide slope 62 merges with the central airflow, ensuring that the airflow passes smoothly through the exhaust air duct 331.

[0063] Continue to refer Figure 7 and Figure 8 Furthermore, a second guide portion 7 is constructed outside the transmitting end connecting hole 34 and the receiving end connecting hole 41. The function of the second guide portion 7 is to block the deflected airflow b from blowing toward the transmitting end connecting hole 34 and the receiving end connecting hole 41, so that the air pressure inside the orifices of the transmitting end connecting hole 34 and the receiving end connecting hole 41 is higher than the air pressure outside the orifices. With the guidance of the second guide portion 7, the smoke flow can smoothly enter the exhaust duct 331 from the long tube 21.

[0064] Continue to refer Figure 7 and Figure 8 The structures and distances of the second guide part 7 at the transmitting end communication hole 34 and the receiving end communication hole 41 are the same and similar. In the following description, the same or similar structures included in the second guide part 7 at the transmitting end communication hole 34 and the receiving end communication hole 41 are represented by the same names and reference numbers. Specifically, the second guide part 7 at the transmitting end is used as an example for description:

[0065] Continue to refer Figure 7 and Figure 8 The second guide part 7 includes a second body 71, which is formed by the opening of the emission end connecting hole 34 extending outward along the direction of smoke flow, and the side facing away from the fan 332 is formed with an arc groove connected to the emission end connecting hole 34, and the side facing the fan 332 is formed with a second guide slope 72. Preferably, the second guide slope 72 is a semi-arc curved surface. Further, a second notch 73 is provided at the extended end of the second body 71, and the opening of the second notch 73 is relatively large, so that the airflow formed by the fan 332 can pass through a large area, ensuring that the smoke can be effectively driven to be discharged. The second guide slope 72 can guide the deflected airflow b to prevent the deflected airflow b from blowing into the launch end connecting hole 34. The curved surface setting can ensure the smooth passage of the airflow and at the same time gather the wind volume, so that the airflow speed passing through the second guide slope 72 is accelerated, which is more conducive to exhausting the smoke entering the exhaust duct 331; the setting of the second notch 73 can ensure that the airflow passes through a large area, avoid affecting the airflow flow, and ensure effective smoke discharge.

[0066] refer to Figure 8 and Fig. 9 The transmitting end seat 30 and the receiving end seat 40 are respectively provided with mounting ears 302 on both sides of the side away from the fan 332 for fixing with the housing 1. At the same time, half-open positioning grooves 303 are provided on multiple surfaces of the transmitting end seat 30 and the receiving end seat 40 to position the transmitting end seat 30 and the receiving end seat 40. Both ends of the long tube 21 can be installed in the countersunk holes 304 provided on the side facing each other of the transmitting end seat 30 and the receiving end seat 40. The stability of the long tube 21 can be ensured by clamping the transmitting end seat 30 and the receiving end seat 40.

[0067] refer to Fig. 9 The housing 1 is roughly in the shape of a cuboid or a quasi-cuboid or a quasi-cuboid. Of course, it can also be an irregular shape. Accordingly, the shape of the housing 1 can be adaptively designed according to the specifications of the actual installation space. The above is only an exemplary description and does not limit the shape of the housing 1. The housing 1 can be formed by a mold or by using 3D printing technology.

[0068] refer to Fig. 9 The housing 1 includes a shell 11 with openings on both sides, a first cover plate 12 and a second cover plate 13 for closing the openings on both sides, the first cover plate 12 and the second cover plate 13 are arranged opposite to each other, and the first cover plate 12 is closer to the fan 332 than the second cover plate 13.

[0069] refer to Fig. 9 The second cover plate 13 can be used to fix the transmitting end seat 30, the receiving end seat 40 and the exhaust pipe 333. The housing 11 is configured with a plurality of threaded holes 111 on one side of the opening where the second cover plate 13 is located. The second cover plate 13 is provided with connection holes 133 corresponding to the threaded holes 111 and the mounting ears 302; these are used to cooperate with fasteners such as bolts to lock the second cover plate 13 on the housing 11, and the exhaust pipe 333 is fixedly connected to the second cover plate 13. It should be noted that the exhaust port and the second cover plate 13, and the second cover plate 13 and the exhaust pipe 333 need to be sealed to prevent smoke from leaking inside the housing 1. Specifically, a plurality of positioning holes 131 are provided on the second cover plate 13, at least one positioning hole 131 corresponds to the positioning groove 303, and the positioning hole 131 can also be used as a mounting hole for the exhaust pipe 333. When the exhaust pipe 333 is locked with fasteners such as bolts, the bolts can be embedded in the positioning groove 303 to achieve the positioning of the transmitting end seat 30 and the receiving end seat 40. On the one hand, it can facilitate the installation and positioning of the transmitting end seat 30 and the receiving end seat 40, and at the same time, it can also ensure that the exhaust port of the exhaust air duct 331 is accurately aligned with the exhaust pipe 333, thereby improving the installation efficiency and quality of the equipment. An assembly hole 132 is provided in the middle of the second cover plate 13, and the assembly hole 132 can allow the exhaust gas intake pipe 22 to pass through the outside of the shell 11.

[0070] refer to Fig. 9 The first cover plate 12 is fastened to the housing 11 by fasteners such as bolts, and a plurality of air inlet holes 121 are provided on its surface. Preferably, the air inlet holes 121 are evenly arranged on the first cover plate 12 so that the first cover plate 12 forms a mesh structure. The air inlet holes 121 can increase the air intake volume and ensure the normal blowing operation of the fan 332.

[0071] According to the objective problems of current diesel vehicle exhaust monitoring, the present invention has made a completely new design for the device, which has reduced the size of the device as a whole and realized the on-board continuous monitoring of diesel vehicle exhaust. Compared with the traditional monitoring method, the lens is abandoned, and the wind curtain is greatly improved on the basis of meeting the detection needs. Through the setting of the guide part, the problem of deflected airflow in the airflow formed by the fan under working conditions can be solved, and the pollution problem of exhaust gas on the emitting light source and the photoelectric converter can be effectively solved. After the application test under working conditions, the monitoring results of the device using the present invention are better than those obtained by the traditional monitoring method; in addition, the emitting light source of the device is less polluted by exhaust gas, and the device has a long continuous online time, which has a good monitoring effect on diesel vehicles and other motor vehicles.

[0072] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle-mounted continuous monitoring device for motor vehicle exhaust, characterized in that: include: A smoke channel (2) is a hollow long tube (21), and a tail gas inlet pipe (22) is provided in the middle of the long tube (21); a transmitting component (3) comprises an incident channel connected to the smoke channel (2), and a transmitting end mounting hole (31), a transmitting light source (32), a first wind curtain (33) and a transmitting end connecting hole (34) are sequentially arranged in the incident channel from an end away from the smoke channel (2) to the smoke channel (2), and the transmitting light source (32) is built in the transmitting end mounting hole (31); a receiving component (4) comprises a receiving channel connected to the other end of the smoke channel (2) opposite to the transmitting component (3), and a receiving end connecting hole (41), a second wind curtain (42), a photoelectric converter (43) and a receiving end mounting hole (44) are sequentially arranged in the receiving channel from an end close to the smoke channel (2) to an end away from the smoke channel (2). 4), the photoelectric converter (43) is built into the receiving end mounting hole (44); a housing (1) is used to encapsulate the smoke channel (2), the transmitting component (3), and the receiving component (4); wherein the central axis of the transmitting light source (32) and the photoelectric converter (43) are both collinear with the central axis of the smoke channel (2), and the blowing direction of the first and second air curtains (42) is perpendicular to the smoke flow direction; the transmitting end mounting hole (31) and the receiving end mounting hole (44) are both configured with a first guide portion (6), the first guide portion (6) is located in the first and second air curtains (42), and the first guide portion (6) guides the airflow of the first air curtain (33) and the second air curtain (42), so that the air pressure outside the orifices of the transmitting end mounting hole (31) and the receiving end mounting hole (44) is lower than the air pressure inside the corresponding orifices; The first air guide portion (6) has a first air guide slope (62) inclined along the air flow direction formed by the first air curtain (33) and the second air curtain (42), and the first air guide slope (62) blocks the deflected air flow in the air flow formed by the first air curtain (33) and the second air curtain (42) that blows toward the transmitting end mounting hole (31) and the receiving end mounting hole (44); A second air guide (7) is configured outside the transmitting end communication hole (34) and the receiving end communication hole (41), the second air guide (7) is located inside the first and second air curtains (42), and the second air guide (7) guides the airflow of the first air curtain (33) and the second air curtain (42), so that the air pressure outside the openings of the transmitting end communication hole (34) and the receiving end communication hole (41) is lower than the air pressure inside the corresponding openings; The second air guide portion (7) has a second air guide slope (72) inclined along the direction of the airflow formed by the first air curtain (33) and the second air curtain (42); the second air guide slope (72) blocks the deflected airflow in the airflow formed by the first air curtain (33) and the second air curtain (42) that blows toward the transmitting end connecting hole (34) and the receiving end connecting hole (41); the second air guide slope (72) is a curved surface.

2. The vehicle-mounted continuous monitoring device for motor vehicle exhaust according to claim 1, characterized in that: The launching assembly (3) comprises an launching end seat (30), the internal structure of the launching end seat (30) forms a first chamber (301) and the launching end mounting hole (31), a first wind curtain (33) is arranged in the first chamber (301), the first chamber (301) is connected to the smoke channel (2), and the launching end mounting hole (31) and the first chamber (301) are jointly constructed to form the incident channel.

3. The vehicle-mounted continuous monitoring device for motor vehicle exhaust gas according to claim 1, characterized in that: The receiving assembly (4) comprises a receiving end seat (40), the internal structure of the receiving end seat (40) is formed with a second chamber (401) and the receiving end mounting hole (44), the second air curtain (42) is arranged in the second chamber (401), the second chamber (401) is connected to the smoke channel (2), and the receiving end mounting hole (44) and the second chamber (401) are jointly constructed to form the incident channel.

4. The vehicle-mounted continuous monitoring device for motor vehicle exhaust gas according to claim 1, characterized in that: A first notch (63) is provided at the end of the first flow guiding inclined surface (62).

5. The vehicle-mounted continuous monitoring device for motor vehicle exhaust gas according to claim 1, characterized in that: A second notch (73) is provided at the end of the second flow guiding inclined surface (72).

6. The vehicle-mounted continuous monitoring device for motor vehicle exhaust gas according to claim 1, characterized in that: The first air curtain (33) and the second air curtain (42) have the same structure, and both include: an exhaust air duct (331), which passes through the corresponding chamber in a direction perpendicular to the flow direction of the smoke; a fan (332), which is arranged at one end of the exhaust air duct (331); and an exhaust pipe (333), which is installed at the other end of the exhaust air duct (331) relative to the fan (332).

7. The vehicle-mounted continuous monitoring device for motor vehicle exhaust gas according to claim 6, characterized in that: The housing (1) comprises: a shell (11); a first cover plate (12) and a second cover plate (13); the first cover plate (12) and the second cover plate (13) are arranged opposite to each other, and the first cover plate (12) is closer to the fan (332) than the second cover plate (13); wherein the first cover plate (12) is provided with a plurality of air inlet holes (121), and the second cover plate (13) is provided with an assembly hole (132) for allowing the exhaust gas inlet pipe (22) to extend out of the shell (11).

Images