CN211402741U - Laser radar and movable atmosphere monitoring system based on partition detection - Google Patents
Laser radar and movable atmosphere monitoring system based on partition detection Download PDFInfo
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- CN211402741U CN211402741U CN201921872696.1U CN201921872696U CN211402741U CN 211402741 U CN211402741 U CN 211402741U CN 201921872696 U CN201921872696 U CN 201921872696U CN 211402741 U CN211402741 U CN 211402741U
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The utility model provides a laser radar and a movable atmosphere monitoring system based on partitioned detection, wherein the laser radar based on partitioned detection comprises a scattered light receiving unit, a simulation detector and an analysis unit; the scattered light emitted by the scattered light receiving unit is divided into a first light beam and a second light beam by a beam splitting device; the analog detector converts the first light beam into a first electric signal corresponding to a first area in the atmosphere and transmits the first electric signal to the analysis unit; the photon counting detector converts the second light beam into a second electric signal corresponding to a second area in the atmosphere and transmits the second electric signal to the analysis unit; the height of the first region is lower than the height of the second region. The utility model has the advantages of near field detection is accurate, detection distance is far away.
Description
Technical Field
The utility model relates to an atmosphere is measured, in particular to laser radar and portable atmosphere monitoring system based on subregion is surveyed.
Background
For the laser radar, an analog acquisition method is generally adopted at present to measure signal intensity information, but the detection range of the laser radar is limited due to lower test sensitivity. In order to realize the detection at a longer distance and improve the detection sensitivity, many laser radars adopt a photon counting method, so that the detection distance is greatly improved.
Wuguang, Von Baicheng et al, university of east China proposed the use of fiber array coupled single photon detector array in 201410387283X three-dimensional imaging system of multi-photon counting laser ranging, realizing three-dimensional imaging system of multi-photon counting laser ranging, exerting ultra-high sensitivity of photon detection, and greatly improving ranging distance. However, although the radar adopting photon counting can greatly improve the detection distance of the laser radar, the short-distance inversion result is not accurate due to high detection sensitivity and easy saturation of a short-distance strong signal.
At present, two designs of an atmospheric sampling main pipe are provided, wherein one design is that a certain length is fixed, and the atmospheric sampling main pipe is not split and can not be detached; and the other two or more sections of sampling header pipes are connected and fixed and are split and detachable. The fixed point monitoring is carried out for a long time in a fixed place, as long as the fixed point position has no requirement of migration, the atmospheric sampling main pipe can not be disassembled and assembled, and the atmospheric sampling main pipes of the two schemes can be used for monitoring at the fixed point; the mobile monitoring is to place the atmospheric sampling manifold on a mobile platform for monitoring during movement, and the atmospheric sampling manifold of the second scheme can be used only due to the uncertainty of the mobile platform and the restriction of laws and regulations.
In view of the limitation of fixed point monitoring, various gas pollution and other reasons, the demand of mobile monitoring is rapidly increasing, and the demand that a mobile platform carries an atmospheric sampling main pipe and an analyzer is trend, but the sampling mode on the current mobile platform is single, the work of disassembling and reassembling a sampling pipe is required when the vehicle is in a limited height position, and the vehicle stops on a road, so that the risk of climbing the roof by personnel is very high. Therefore, the demand of inventing a vehicle-mounted lodging type atmosphere sampling main pipe is particularly important.
SUMMERY OF THE UTILITY MODEL
For solving not enough among the above-mentioned prior art scheme, the utility model provides a laser radar based on subregion detection that near field signal is accurate, detection distance is far away.
The utility model aims at realizing through the following technical scheme:
the laser radar based on the subarea detection comprises a scattered light receiving unit, a simulation detector and an analysis unit; the laser radar based on partitioned detection further comprises:
the scattered light emitted by the scattered light receiving unit is divided into a first light beam and a second light beam by the beam splitting device; the analog detector converts the first light beam into a first electric signal corresponding to a first area in the atmosphere and transmits the first electric signal to the analysis unit;
a photon counting detector which converts the second light beam into a second electrical signal corresponding to a second region in the atmosphere and transmits the second electrical signal to the analysis unit; the height of the first region is lower than the height of the second region.
The utility model aims at providing a portable atmosphere monitoring system who uses above-mentioned atmosphere sampling pipe has still been provided, has realized that atmosphere detection near field signal is accurate, detection distance is far away's invention purpose, has further realized safety, need not artifical dismantlement folding atmosphere sampling pipe, good reliability's invention purpose, and this invention purpose can be realized through following technical scheme:
a mobile atmospheric monitoring system comprising a mobile tool; the mobile atmospheric monitoring system further comprises:
the laser radar adopts the laser radar and is arranged on the moving tool.
Compared with the prior art, the utility model discloses the beneficial effect who has does:
1. creatively provides that the analog detector is used for detecting a near-field signal of a first area and the photon counting detector is used for detecting a far-field signal of a second area, and meanwhile, the light intensity of the beam splitting is limited, so that the analog detector is prevented from being saturated; by means of splicing of the near-field signal and the far-field signal in the prior art (see CN108089172A), the near-field signal is accurate, and meanwhile, the detection distance is long;
2. safety;
the laser radar based on the partition detection is creatively arranged and falls down as required, so that the height of the sampling tube is reduced, and the sampling tube can safely and conveniently pass through the height limiting rod;
3. manual disassembly and folding are not needed;
when the atmosphere sampling pipe needs to be folded, the motor is automatically controlled to drive the first rotating shaft to rotate, so that the first pipeline is laid down, and the first pipeline is completely and manually disassembled;
even if the motor fails, the second rotating shaft can be manually rotated without disassembling the first pipeline;
4. the reliability is good;
the bendable third pipeline is made of flexible materials or corrugated pipes, so that after the third pipeline is bent for multiple times, the sealing performance between the third pipeline and the first pipeline and between the third pipeline and the second pipeline can be still ensured, the working reliability of the atmosphere sampling pipe is ensured, and the accuracy of subsequent atmosphere analysis is improved;
the design of staple bolt, mounting and connecting piece (have vertical portion, horizontal part and rib), has obviously improved structural strength to improve the bearing capacity to first pipeline (erect and when lodging), prevented to be blown down by wind.
Drawings
The disclosure of the present invention will become more readily understood with reference to the accompanying drawings. As is readily understood by those skilled in the art: these drawings are only intended to illustrate the technical solution of the present invention and are not intended to limit the scope of the present invention. In the figure:
fig. 1 is a schematic structural diagram of a mobile atmospheric monitoring system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a laser radar based on zonal detection according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a lodging-type atmosphere sampling tube according to an embodiment of the invention.
Detailed Description
Fig. 1-3 and the following description depict alternative embodiments of the invention to teach those skilled in the art how to make and reproduce the invention. For the purpose of teaching the present invention, some conventional aspects have been simplified or omitted. Those skilled in the art will appreciate variations or substitutions from these embodiments that will be within the scope of the invention. Those skilled in the art will appreciate that the features described below can be combined in various ways to form multiple variations of the invention. Accordingly, the present invention is not limited to the following alternative embodiments, but is only limited by the claims and their equivalents.
Example 1:
fig. 1 schematically shows a schematic structural diagram of a mobile atmosphere monitoring system according to an embodiment of the present invention, and as shown in fig. 1, the mobile atmosphere monitoring system includes:
a mobile platform 1, such as an automobile;
the atmosphere monitors, such as a gas content monitor, a particulate matter monitor and the like, are all arranged in the mobile platform, such as an automobile;
fig. 2 schematically shows a simplified structural diagram of a laser radar based on partition detection according to an embodiment of the present invention, as shown in fig. 2, the laser radar based on partition detection includes:
a laser, an emitting unit and a scattered light receiving unit 61, which are all prior art in the field, and the specific structure and operation mode are not described herein;
a beam splitting device 71, by which the scattered light emitted from the scattered light receiving unit 61 is split into a first beam and a second beam; the analog detector 81 converts the first light beam into a first electric signal corresponding to a first region in the atmosphere and transmits the first electric signal to an analysis unit;
a photon counting detector 82, wherein the photon counting detector 82 converts the second light beam into a second electric signal corresponding to a second region in the atmosphere, and transmits the second electric signal to an analysis unit; the height of the first region (near field) is lower than that of the second region (far field), and the intensity of the second light beam is greater than that of the first light beam, so that the saturation of the analog detector is effectively prevented;
fig. 3 schematically shows a schematic structural diagram of a lodging-type atmosphere sampling tube according to an embodiment of the present invention, and as shown in fig. 3, the lodging-type atmosphere sampling tube includes:
the first pipeline 11 is a double-layer pipe consisting of an inner pipe and an outer pipe; the first pipeline 11 is exposed to the outside, and is made of a waterproof and anti-aging material, such as stainless steel;
the second pipeline 12 is arranged at the lower part of the first pipeline 11, and is a double-layer pipe formed by an inner pipe and an outer pipe, and is fixed on a moving platform, such as the top of an automobile; the outlet of the second pipeline is communicated with an atmosphere monitor;
a third pipeline 13, wherein the third pipeline 13 is used for communicating the first pipeline 11 and the second pipeline 12 which are arranged up and down; the third pipe 13 bends clockwise and counterclockwise along with the first pipe 11, and the third pipe 13 is made of flexible material or corrugated pipe, so that the third pipe is conveniently bent;
connectors 51-53, said connectors 51-53 for connecting said first conduit 11 and swivel arm 31;
a rotating arm 31, wherein the rotating arm 31 is fixed on the first rotating shaft 22 and rotates along with the first rotating shaft 22;
and a first rotating shaft 22, wherein the first rotating shaft 22 is driven by external force to rotate clockwise and anticlockwise.
In order to reduce the light intensity of the first light beam and prevent the analog detector from being saturated, an antireflection film is arranged on one side of the beam splitter facing the scattered light emitted by the light receiving unit, the second light beam is transmitted light, and the first light beam is reflected light; alternatively, the first and second electrodes may be,
the side of the beam splitting device facing the scattered light emitted by the light receiving unit is provided with a reflection increasing film, the second light beam is reflected light, and the first light beam is transmitted light.
In order to reduce the difficulty of rotating the first rotating shaft, further, the laser radar based on partition detection further includes:
and a gear set (not shown) through which an external force drives the first rotating shaft to rotate, thereby reducing an external driving force and enabling the first pipeline to be laid down by using a small motor or manpower.
In order to prevent the malfunction caused by the motor and the like, further, the gear set includes a first gear, and the laser radar based on the subarea detection further includes:
a second rotating shaft 21 along which the first gear rotates; an included angle between the central axis of the second rotating shaft 21 and the central axis of the first rotating shaft 22 is an acute angle or a right angle; one end of the second rotating shaft, which is far away from the first gear, is matched with the crank;
the crank is fixed on the second rotating shaft and drives the second rotating shaft to rotate; so that the crank is operated by manpower to drive the second rotating shaft to rotate.
In order to ensure a stable connection between the first pipe and the rotating arm to support the first pipe well, further, the partitioned detection-based lidar further comprises:
and the hoop 61 is arranged on the first pipeline 11, and is connected with the connecting piece.
In order to connect the two rotating arms together to better support the first pipeline, further, the laser radar based on the subarea detection further comprises:
and a fixing member 41, wherein the fixing member 41 is connected to two rotating arms 31 respectively provided at both ends of the first rotating shaft 22.
In order to increase the coupling area and the supporting strength, the coupling member further includes a vertical part 51 having a sheet shape and a horizontal part 52 having a sheet shape, the vertical part 51 is coupled to the anchor ear 61, and the horizontal part 52 is coupled to the fixing member 41, thereby firmly coupling the first duct 11 to the pivoting arm 31.
In order to further improve the strength of the connecting piece, further, the connecting piece further comprises:
a reinforcing portion 53, and a vertical sheet-shaped reinforcing portion 53 connected to the vertical portion 51 and the horizontal portion 52, respectively.
In order to prevent the third pipeline from being corroded and impacted by external rain, snow and the like, further, the laser radar based on the subarea detection further comprises:
and a fourth pipe 14, wherein the fourth pipe 14 is arranged at the periphery of the third pipe 13 and is respectively fixed on the first pipe 11 and the second pipe 12.
Example 2:
according to the utility model discloses embodiment 1's portable atmospheric monitoring system's application example.
In the application example, based on the laser radar for partitioned detection, the beam splitting device adopts the obliquely arranged beam splitting mirror, an antireflection film is arranged on one side facing to the scattered light emitted by the receiving unit, so that the light intensity of the transmitted light is 4 times of that of the reflected light, the photon counting detector receives the transmitted light, and the analog detector receives the first light beam;
the first pipeline and the second pipeline are both made of stainless steel, wherein the second pipeline is arranged on the top wall of the automobile, and the lower end of the second pipeline is communicated with an atmosphere monitor; the third pipeline adopts a corrugated pipe, and the upper end and the lower end of the third pipeline are respectively fixed on the inner pipes of the first pipeline and the second pipeline; the fourth pipeline adopts a corrugated pipe, and the upper end and the lower end of the fourth pipeline are respectively fixed on the outer pipes of the first pipeline and the second pipeline;
the motor and the gear set are arranged in the gear box, and meanwhile, the second rotating shaft is exposed and faces the rear of the automobile; the crank is hung on the gear box; the included angle between the central axes of the second rotating shaft and the first rotating shaft is a right angle; the two rotating arms are positioned outside the gear box and are respectively arranged at two opposite ends of the first rotating shaft; the fixing piece of the annular structure is fixedly connected with the two rotating arms; the horizontal part of the sheet structure of the connecting piece is connected with the fixing piece, the vertical part of the sheet structure is connected with the hoop fixed on the outer edge of the first pipeline, the reinforcing part is of a sheet structure, and the vertical reinforcing part is respectively connected with the vertical part and the horizontal part; the first pipeline is provided with limiting parts which are arranged up and down, and the hoop is positioned between the two limiting parts.
The working mode of the mobile atmosphere monitoring system is as follows:
the automobile is moved to a monitoring place according to the requirement;
the motor rotates forwards to drive the first rotating shaft to rotate forwards, and the first rotating shaft rotating forwards drives the lodging first pipeline to rotate forwards and gradually stand; when the first pipeline reaches the vertical state, the motor stops rotating;
the air pump works, and the outside air enters the atmosphere monitor for analysis after passing through the first pipeline, the third pipeline and the second pipeline in sequence;
the detection light emitted by the laser penetrates through a window of the roof to emit to the atmosphere, the scattered light penetrates through the window of the roof to be received by the scattered light receiving unit and then split by the beam splitter, a first light beam serving as reflected light is received by the analog detector, a second light beam serving as transmitted light is received by the photon counting detector, and the light intensity of the second light beam is 4 times that of the first light beam;
when the automobile needs to move, the motor rotates reversely to drive the first rotating shaft to rotate reversely, and the first rotating shaft rotating reversely drives the vertical first pipeline to rotate reversely and fall down gradually; when the first pipeline reaches a horizontal state, the motor stops rotating;
if the motor breaks down, or when lacking in electricity, operating personnel climbs high, uses the crank to connect the second axis of rotation to the forward and the direction of drive first pipeline are rotated.
In the above embodiments, the forward direction and the reverse direction do not generally refer to the rotation directions of the respective components, such as the rotation directions of the motor, the first rotating shaft, the rotating arm, and the first pipe are identical, but refer to the respective components alone.
Claims (10)
1. The laser radar based on the subarea detection comprises a scattered light receiving unit, a simulation detector and an analysis unit; the method is characterized in that: the laser radar based on partitioned detection further comprises:
the scattered light emitted by the scattered light receiving unit is divided into a first light beam and a second light beam by the beam splitting device; the analog detector converts the first light beam into a first electric signal corresponding to a first area in the atmosphere and transmits the first electric signal to the analysis unit;
a photon counting detector which converts the second light beam into a second electrical signal corresponding to a second region in the atmosphere and transmits the second electrical signal to the analysis unit; the height of the first region is lower than the height of the second region.
2. The zonal detection-based lidar of claim 1, wherein: the second light beam has a greater intensity than the first light beam.
3. The zonal detection-based lidar of claim 2, wherein: and one side of the beam splitting device facing the scattered light emitted by the light receiving unit is provided with an antireflection film, the second light beam is transmitted light, and the first light beam is reflected light.
4. The zonal detection-based lidar of claim 2, wherein: the side of the beam splitting device facing the scattered light emitted by the light receiving unit is provided with a reflection increasing film, the second light beam is reflected light, and the first light beam is transmitted light.
5. A mobile atmospheric monitoring system comprising a mobile tool; the method is characterized in that: the mobile atmospheric monitoring system further comprises:
a lidar employing the lidar of any of claims 1-4 and disposed on the moving tool.
6. A mobile atmospheric monitoring system according to claim 5 characterised in that: portable atmospheric monitoring system still includes particulate matter detector and lodging formula atmosphere sampling pipe, lodging formula atmosphere sampling pipe includes:
a first duct and a second duct disposed at a lower portion of the first duct;
the third pipeline is used for communicating the first pipeline and the second pipeline which are arranged up and down; the third tube bends clockwise and counterclockwise with the first tube;
a connector for connecting the first pipe and the swivel arm;
the rotating arm is fixed on a first rotating shaft and rotates along with the first rotating shaft;
and the first rotating shaft is driven by external force to rotate clockwise and anticlockwise.
7. The mobile atmospheric monitoring system of claim 6, wherein: the lodging formula atmosphere sampling pipe still includes:
the gear set is used for driving the first rotating shaft to rotate by external force; the gear train includes first gear, the formula atmosphere of lodging sampling pipe still includes:
a second rotating shaft, the first gear rotating with the second rotating shaft; an included angle between the central axis of the second rotating shaft and the central axis of the first rotating shaft is an acute angle or a right angle; one end of the second rotating shaft, which is far away from the first gear, is matched with the crank;
and the crank is fixed on the second rotating shaft and drives the second rotating shaft to rotate.
8. The mobile atmospheric monitoring system of claim 6, wherein: the lodging formula atmosphere sampling pipe still includes:
and the fixing piece is connected with the two rotating arms respectively arranged at the two ends of the first rotating shaft.
9. A mobile atmospheric monitoring system according to claim 8 wherein: the connecting piece comprises a sheet vertical part and a sheet horizontal part, the vertical part is connected with a hoop fixed on the first pipeline, and the horizontal part is connected with the fixing piece.
10. The mobile atmospheric monitoring system of claim 6, wherein: the lodging formula atmosphere sampling pipe still includes:
and the fourth pipeline is arranged on the periphery of the third pipeline and is respectively fixed on the first pipeline and the second pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921872696.1U CN211402741U (en) | 2019-11-02 | 2019-11-02 | Laser radar and movable atmosphere monitoring system based on partition detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921872696.1U CN211402741U (en) | 2019-11-02 | 2019-11-02 | Laser radar and movable atmosphere monitoring system based on partition detection |
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| Publication Number | Publication Date |
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| CN211402741U true CN211402741U (en) | 2020-09-01 |
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| CN201921872696.1U Active CN211402741U (en) | 2019-11-02 | 2019-11-02 | Laser radar and movable atmosphere monitoring system based on partition detection |
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- 2019-11-02 CN CN201921872696.1U patent/CN211402741U/en active Active
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