CN112748088A - Double-light-path transceiving integrated vertical motor vehicle tail gas remote sensing device - Google Patents
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Abstract
The invention discloses a double-light-path receiving and transmitting integrated vertical motor vehicle tail gas remote sensing device, which is usually arranged on a portal frame crossing a road, comprises a cabinet, a first light-emitting receiving hole, a second light-emitting receiving hole and two groups of status indicator lamps, wherein the cabinet is used for supporting the whole device; the beam combining unit is arranged on the frame and consists of a CO2 laser, a CO laser, a CH laser, a NO laser, a green light, a laser expansion unit and a beam combining assembly; the light splitting unit is used for splitting the combined light beam of the light combining unit in multiple paths and passing through tail gas smoke masses discharged by motor vehicles running on different positions of a road; the reflecting end is laid on the ground by a reflecting material with an divergence angle of +/-10 degrees, and the laying mode can be laid on the whole road surface or at intervals of multiple paths; the double-optical-path receiving unit is used for receiving light with the concentration information of the gas to be measured, performing photoelectric conversion, concentration inversion, concentration output and other functions, and can realize synchronous, efficient and accurate measurement of multiple components in the exhaust emission.
Description
Technical Field
The invention relates to the technical field of remote sensing measurement of motor vehicle tail gas, in particular to a double-light-path transceiving integrated vertical motor vehicle tail gas remote sensing device.
Background
By the end of 2019, the number of motor vehicles in China reaches 2.6 hundred million, and the tail gas pollution of the motor vehicles becomes an increasingly prominent factor of urban air pollution. The ministry of ecological environment approves and releases limit of emission of pollutants for light automobiles and a measuring method (sixth stage in china) and limit of emission of pollutants for heavy diesel vehicles and a measuring method (sixth stage in china) in 2016, 24 and 2018, 5, 22 respectively, and makes higher requirements on emission standards of motor vehicle exhaust. However, the existing motor vehicles with excessive emission are just like mobile pollution sources, so that great burden is caused to the living environment of human beings, and how to quickly and conveniently detect whether the exhaust emission of the motor vehicles in driving exceeds the standard becomes a social concern.
The remote exhaust gas sensing technology is the best means for solving the problems, and can detect the exhaust gas emitted by the motor vehicles running on the road in a short time under the condition of not influencing traffic. The detection modes adopted in the market at present mainly comprise a horizontal type, a movable type and a vertical type, and the technical means is usually the combination of infrared and ultraviolet. The main problem of the light path form is that the light path horizontally spans a plurality of lanes, when a vehicle passes through a detected light path at the same time, data can be judged to be invalid, and even misjudgment occurs; the mobile type is developed based on a horizontal type, a mobile monitoring vehicle and related operators need to be equipped, and the detection efficiency is not high; the vertical type light path is mostly V-shaped or W-shaped, the light path stability is poor, and the system can not stably work for a long time; the performances of detection precision, response speed and the like of infrared (NDIR) and ultraviolet (DOAS) technical means are far lower than that of tunable semiconductor laser absorption spectroscopy (TDLAS).
Disclosure of Invention
The invention aims to make up the defects of the prior art and provides a double-light-path transceiving integrated vertical motor vehicle exhaust remote sensing device.
The invention is realized by the following technical scheme:
a dual-light-path transceiving integrated vertical motor vehicle tail gas remote sensing device comprises dual-light-path vertical equipment, a first path detection light, a second path detection light, tail gas plume, a reflection end and a road surface; the double-light-path vertical equipment emits two beams of combined light, the distance between the first path of detection light and the second path of detection light is 1.35m, the first path of detection light and the second path of detection light can meet the requirement that a motor vehicle is arranged at the left or right exhaust pipe position, real-time exhaust smoke plume emitted by the motor vehicle on a road surface passes through, the light beams are subjected to diffuse reflection by a reflection end to form enlarged angle reflection, the reflection end is made of a specially-processed high-performance wear-resistant polymer material, the reflection divergence angle is controlled to be +/-10 degrees, the laying mode of the reflection end can be selected to be full-road strip laying or point laying according to actual conditions, and the enlarged light beams with gas concentration information are received and processed by the double-light-path vertical equipment to.
The double-light-path vertical equipment comprises a cabinet, an installation angle plate, a first inspection port, a communication network port, a gas inlet, a power supply interface, a signal output interface, a gas outlet, a second inspection port, a first light outlet, a second light outlet, a first receiving unit state lamp group and a second receiving unit state lamp group; the equipment cabinet is integrally supported by double-light-path vertical equipment, the installation angle plate is connected with the equipment cabinet through a bolt, the double-light-path vertical equipment is connected with the portal frame through the installation angle plate, and the portal frame is installed on a road surface; in order to facilitate debugging, a first inspection opening and a second inspection opening are arranged on the side surface of the cabinet; the communication network port adopts RJ45, is connected with an upper computer of a motor vehicle exhaust emission monitoring system, and can operate and control the double-light-path vertical equipment through the upper computer; the power interface is a power supply interface of the equipment; the signal output interface transmits concentration information such as CO2, CO, CH, NO, light-tight smoke intensity and the like in the tail gas plume to an upper computer of a motor vehicle tail gas emission monitoring system through a cable for processing, judging and displaying; the gas inlet and the gas outlet are connected with an internal calibration gas pool, and during the production process of the equipment, tail gas standard gas is filled in the equipment to perform calibration test on the equipment. In the equipment debugging process, filling tail gas standard gas, and calibrating the equipment; the first light outlet hole corresponds to the first path of detection light, the second light outlet hole corresponds to the second path of detection light, and the light beams are positioned in the center of the light outlet holes; the first receiving unit state lamp group and the second receiving unit state lamp group respectively comprise 6 state lamps which are respectively defined as a power supply, initialization, internal temperature, laser temperature, communication and light intensity and reflect the working state of each receiving unit.
The cabinet comprises a rack, a beam combination unit, a reference gas pool, a light splitting unit, a first reflector, a first receiving unit, a second reflector and a second receiving unit, wherein the rack is an aluminum bottom plate, and an aluminum section bar support is arranged at the bottom of the rack; the beam combining unit is arranged in the middle of the rack, and a reference gas pool is arranged in front of the beam combining unit;
the beam combination unit is formed by a beam combination assembly, a combined beam, a beam combination rack and a plurality of lasers, the beam combination rack is supported by the beam combination assembly, the plurality of lasers comprise a CO2 laser, a CO laser, a CH laser, an NO laser, a green light and a laser expansion module, the CO2 laser adopts a 2004nm wavelength light source, the CO laser adopts a 2327nm wavelength light source, the CH laser adopts a 3370nm wavelength light source, the NO laser adopts a 5262nm wavelength light source, the green light adopts a 560nm wavelength light source, and the laser expansion module can be added with semiconductor lasers corresponding to gas absorption peaks such as NH3, SO2, NO2 and O2 according to actual measurement requirements; the beam combining assembly is formed by combining a plurality of groups of lenses, and a plurality of lasers complete beam combination after passing through the beam combining assembly;
two lenses with 8-degree wedge angles on the end surfaces plated with antireflection films, namely GAF2 lenses, are arranged on the two end surfaces of the reference gas tank, and combined light beams can pass through the lenses;
the beam splitting unit is combined by a plurality of groups of lenses, the combined beam passes through the beam splitting unit and then is subjected to double-path beam splitting according to the energy design proportion, and if more paths of detection are needed, a plurality of beam splitting units can be arranged;
the first reflector and the second reflector are both gold-plated reflectors, and the wavelengths of the used lasers can be reflected; the combined beam split by the beam splitting unit enters a first receiving unit and a second receiving unit after being reflected by a first reflecting mirror and a second reflecting mirror;
the first receiving unit and the second receiving unit are consistent in composition and comprise a reflecting mirror, a reflected large light beam, a window, a focusing mirror, a detector unit, a signal processing circuit and a receiving rack, wherein the reflecting mirror is a perforated gold-plated reflecting mirror, the aperture is 12mm, and the combined light beam split by the splitting unit can penetrate through the center; a GAF2 lens is adopted in a window, and an 8-degree wedge angle is formed in one end face; the combined beam after being split by the light splitting unit passes through the window and then is emitted to a reflection end laid on the ground, the beam returns through a diffuse reflection center diffusion original path, passes through the window and is received by a focusing mirror after being reflected, the detector unit is arranged at the focal position of the focusing mirror and performs photoelectric conversion, the signal is transmitted to a signal processing circuit, and the concentration of each gas component in the tail gas is inverted by a concentration inversion algorithm.
The invention has the advantages that: the light splitting unit splits the combined light beams of the light combining unit in multiple paths, the combined light beams penetrate through tail gas smoke masses which are arranged on different positions of a road when a motor vehicle runs, the reflecting end is laid on the ground by a reflecting material with an angle of divergence of +/-10 degrees, the laying form can be laid on the whole road surface or at intervals in multiple paths, and the double-light-path receiving unit is used for receiving light with the concentration information of a measured gas, performing photoelectric conversion, concentration inversion, concentration output and other functions, and can realize synchronous, efficient and accurate measurement of multiple components in tail gas emission.
Drawings
FIG. 1 is a first schematic view of the apparatus of the present invention;
fig. 2 is a schematic view of the installation and measurement of the device according to the present invention.
FIG. 3 is an external view of the apparatus according to the present invention;
FIG. 4 is a bottom view of the apparatus of the present invention;
FIG. 5 is a schematic diagram of an internal spectroscopy path according to the present invention;
FIG. 6 is a schematic view of a beam combining unit according to the present invention;
fig. 7 is a schematic diagram of a receiving unit according to the present invention.
Detailed Description
The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and examples, which are only for the convenience of understanding and are not intended to limit the present invention.
As shown in fig. 1-2, the invention provides a dual-light-path transceiving integrated vertical motor vehicle exhaust remote sensing device, which comprises a dual-light-path vertical device 1, a first path detection light 2, a second path detection light 3, exhaust smoke plume 4, a reflection end 5 and a road surface 6; the double-light-path vertical equipment 1 emits two beams of combined light, the distance between a first path of detection light 2 and a second path of detection light 3 is 1.35m, the distance can meet the requirement that a motor vehicle is provided with an exhaust pipe at the left or right, the light passes through real-time exhaust smoke plume 4 emitted by the motor vehicle on a road surface 6, the light beams are subjected to diffuse reflection through a reflection end 5 to form an expanded angle for reflection, the reflection end material is a specially-treated high-performance wear-resistant high polymer material, the reflection divergence angle is controlled to be +/-10 degrees, the laying mode of the reflection end 5 can be selected to be full-road strip laying or point laying according to actual conditions, and the expanded light beams with gas concentration information are received and treated by the double-light-path vertical equipment 1 to output the concentration information of each.
As shown in fig. 3 to 4, the dual light path vertical apparatus 1 includes a cabinet 101, an installation angle plate 102, a first inspection opening 103, a communication network opening 104, an air inlet 105, a power interface 106, a signal output interface 107, an air outlet 108, a second inspection opening 109, a first light outlet 110, a second light outlet 111, a first receiving unit status light set 112, and a second receiving unit status light set 113; the cabinet 101 is an integral support of the double-light-path vertical equipment 1, the installation angle plate 102 is connected with the cabinet 101 through a bolt, the double-light-path vertical equipment 1 is connected with a portal frame through the installation angle plate 102, and the portal frame is installed on a road surface; for debugging convenience, a first inspection opening 103 and a second inspection opening 109 are arranged on the side surface of the cabinet 101; the communication network port 104 adopts RJ45 and is connected with an upper computer of the motor vehicle exhaust emission monitoring system, and the dual-light-path vertical equipment 1 can be operated and controlled through the upper computer; the power interface 106 is a device power interface; the signal output interface 107 transmits concentration information such as CO2, CO, CH, NO, light-tight smoke intensity and the like in the tail gas plume to an upper computer of a motor vehicle tail gas emission monitoring system through a cable for processing, judging and displaying; the gas inlet 105 and the gas outlet 108 are connected with an internal calibration gas pool, and during the production process of the equipment, tail gas standard gas is filled in to perform calibration test on the equipment. In the equipment debugging process, filling tail gas standard gas, and calibrating the equipment; the first light outlet 110 corresponds to the first path of detection light 2, the second light outlet 111 corresponds to the second path of detection light 3, and the light beams are all located at the center of the light outlet; the first receiving unit status light group 112 and the second receiving unit status light group 113 respectively include 6 status lights, which are respectively defined as power, initialization, internal temperature, laser temperature, communication, light intensity, and reflect the operating status of each receiving unit.
As shown in fig. 5 to 7, the cabinet 101 includes a frame 114, a beam combining unit 115, a reference air pool 116, a beam splitting unit 117, a first reflector 118, a first receiving unit 119, a second reflector 120, and a second receiving unit 121, where the frame 114 is an aluminum bottom plate and an aluminum profile is arranged at the bottom of the frame for supporting; the beam combination unit 115 is arranged in the middle of the rack 114, and a reference air pool 116 is arranged in front of the beam combination unit 115;
the beam combination unit 115 is formed by a beam combination assembly 1157, a combined beam 1158, a beam combination rack 1159 and a plurality of lasers, the beam combination rack 1159 is used for supporting the beam combination assembly, the plurality of lasers comprise a CO2 laser 1151, a CO laser 1152, a CH laser 1153, an NO laser 1154, a green light 1155 and a laser expansion module 1156, the CO2 laser 1151 adopts a 2004nm wavelength light source, the CO laser 1152 adopts a 2327nm wavelength light source, the CH laser 1153 adopts a 3370nm wavelength light source, the NO laser 1154 adopts a 5262nm wavelength light source, the green light adopts a 560nm wavelength light source, and the laser expansion module 1156 can add semiconductor lasers corresponding to gas absorption peaks such as NH3, SO2, NO2 and O2 according to actual measurement requirements; the beam combining component 1157 is formed by combining a plurality of groups of lenses, and a plurality of lasers complete light beam combination 1158 after passing through the beam combining component 1157;
two lenses with 8-degree wedge angles on the end surfaces plated with antireflection films, namely GAF2 lenses, are arranged on the two end surfaces of the reference gas tank 116, and combined light beams 1158 can penetrate through the lenses;
the light splitting unit 117 is formed by combining a plurality of groups of lenses, the combined light beam 1158 is subjected to double-path light splitting according to an energy design proportion after passing through the light splitting unit 117, and if more paths of detection are needed, a plurality of light splitting units 117 can be arranged;
the first reflector 118 and the second reflector 120 are both gold-plated reflectors, and the wavelengths of the lasers can be reflected; the combined beam 1158 split by the splitting unit 117 enters the first receiving unit 119 and the second receiving unit 121 after being reflected by the first reflecting mirror 118 and the second reflecting mirror 120;
the first receiving unit 119 and the second receiving unit 121 are consistent, and include a reflecting mirror 1191, a reflected large light beam 1192, a window 1193, a focusing mirror 1194, a detector unit 1195, a signal processing circuit 1196, and a receiving frame 1197; the reflecting mirror 1191 is a perforated gold-plated reflecting mirror with an aperture of 12mm, so that the combined beam 1158 split by the splitting unit 117 can pass through the central position; a window 1193 adopts a GAF2 lens, and one end surface of the window is provided with an 8-degree wedge angle; the combined beam 1158 split by the light splitting unit 117 passes through the window 1193 and then is emitted to the reflection end 5 laid on the ground 6, the beam is diffused by the diffuse reflection center and returns back, passes through the window 1193, is reflected by the window 1191 and then is focused and received by the focusing mirror 1194, the detector unit 1195 is arranged at the focal point position of the focusing mirror 1194, the detector unit 1195 performs photoelectric conversion, transmits the signal to the signal processing circuit 1196, and the concentration of each gas component in the tail gas is inverted through a concentration inversion algorithm.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides an integrative rectilinear motor vehicle exhaust remote sensing device of two light paths receiving and dispatching which characterized in that: comprises a double-light-path vertical device and a reflecting end; the double-light-path vertical equipment emits two beams of detection light, the two beams of detection light respectively penetrate real-time tail gas smoke plume discharged by motor vehicles on a road surface, the two beams of detection light are subjected to diffuse reflection through the reflection end to form enlarged angle reflection, the reflection end is laid in a full-road strip-shaped laying mode or a dot-shaped laying mode, and the enlarged light beams with gas concentration information are received and processed by the double-light-path vertical equipment to output component concentration information of the tail gas smoke plume.
2. The dual optical path transceiving integrated vertical motor vehicle exhaust remote sensing device according to claim 1, wherein: the distance between the two detection light beams is 1.35 m.
3. The dual optical path transceiving integrated vertical motor vehicle exhaust remote sensing device according to claim 1, wherein: the reflecting end material is a high-performance wear-resistant polymer material, and the reflection divergence angle is controlled to be +/-10 degrees.
4. The dual optical path transceiving integrated vertical motor vehicle exhaust remote sensing device according to claim 1, wherein: the double-light-path vertical equipment comprises a cabinet, wherein a rack, a beam combining unit, a first receiving unit, a second receiving unit, a light splitting unit, a first reflecting mirror and a second reflecting mirror are arranged in the cabinet,
the beam combining unit is arranged in the middle of the rack, the first receiving unit and the second receiving unit are respectively positioned on two sides of the beam combining unit, and a reference air pool is arranged in front of the beam combining unit.
5. The dual optical path transceiving integrated vertical motor vehicle exhaust remote sensing device according to claim 4, wherein: angle plates are respectively fixed at two ends of the cabinet, a first inspection port, a second inspection port, a communication network port, an air inlet, an air outlet, a power supply interface and a signal output interface are arranged on the front side surface of the cabinet, the air inlet and the air outlet are connected with the reference air pool, and a first light outlet hole and a second light outlet hole are arranged at the bottom of the cabinet; the cabinet bottom is also provided with a first receiving unit state lamp group and a second receiving unit state lamp group, and the first receiving unit state lamp group and the second receiving unit state lamp group respectively comprise 6 state lamps which are respectively defined as a power supply, initialization, internal temperature, laser temperature, communication and light intensity.
6. The dual optical path transceiving integrated vertical motor vehicle exhaust remote sensing device according to claim 5, wherein: the beam combining unit comprises a beam combining assembly, a beam combining rack and a plurality of lasers, the beam combining rack is used for supporting the beam combining assembly, the lasers comprise a CO2 laser, a CO laser, a CH laser, an NO laser, a green laser and a laser expansion module, the beam combining assembly is combined by a plurality of groups of lenses, and the beams are combined after the lasers pass through the beam combining assembly; the CO2 laser adopts a 2004nm wavelength light source, the CO laser adopts a 2327nm wavelength light source, the CH laser adopts a 3370nm wavelength light source, the NO laser adopts a 5262nm wavelength light source, the green laser adopts a 560nm wavelength light source, and the laser expansion module is added with semiconductor lasers corresponding to NH3, SO2, NO2 and O2 gas absorption peaks according to actual measurement needs.
7. The dual optical path transceiving integrated vertical motor vehicle exhaust remote sensing device according to claim 4, wherein: two pieces of end face 8-degree wedge angle GAF2 lenses coated with antireflection films are arranged on two end faces of the reference air pool, and light beams combined by the combining unit pass through the reference air pool.
8. The dual optical path transceiving integrated vertical motor vehicle exhaust remote sensing device according to claim 4, wherein: the light splitting unit is combined by a plurality of groups of lenses, and the combined light beam is split in two ways according to the energy design proportion after passing through the light splitting unit.
9. The dual optical path transceiving integrated vertical motor vehicle exhaust remote sensing device according to claim 4, wherein: the first reflector and the second reflector are both gold-plated reflectors; the combined beam split by the beam splitting unit enters the first receiving unit and the second receiving unit after being reflected by the first reflecting mirror and the second reflecting mirror respectively.
10. The dual optical path transceiving integrated vertical motor vehicle exhaust remote sensing device according to claim 9, wherein: the first receiving unit and the second receiving unit respectively comprise a reflecting mirror, a window, a focusing mirror, a detector unit, a signal processing circuit and a receiving rack; the reflector adopts a perforated gold-plated reflector with the aperture of 12 mm; the window adopts a GAF2 lens, and one end surface of the window is provided with an 8-degree wedge angle; the combined beam split by the light splitting unit passes through the window and then is emitted to a reflection end laid on the ground, the beam returns through a diffuse reflection center diffusion original path, passes through the window, is reflected by the reflector and then is received by a focusing mirror in a focusing mode, the detector unit is arranged at the focal position of the focusing mirror, performs photoelectric conversion on the detector unit, transmits signals to the signal processing circuit, and inverses the concentration of each gas component in the tail gas through a concentration inversion algorithm.
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| CN202110002290.3A CN112748088A (en) | 2021-01-04 | 2021-01-04 | Double-light-path transceiving integrated vertical motor vehicle tail gas remote sensing device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115372313A (en) * | 2022-10-21 | 2022-11-22 | 合肥金星智控科技股份有限公司 | Detection light path and detection system based on TDLAS technology |
| WO2022266690A1 (en) | 2021-06-25 | 2022-12-29 | Avl List Gmbh | Measuring unit and method for measuring at least one gaseous or solid material |
| WO2022266688A1 (en) * | 2021-06-25 | 2022-12-29 | Avl List Gmbh | Device for measuring at least one gaseous or solid material |
Citations (8)
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