CN210465691U - Scanning mechanism and non-blind area atmosphere ozone detection system - Google Patents
Scanning mechanism and non-blind area atmosphere ozone detection system Download PDFInfo
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- CN210465691U CN210465691U CN201920638865.9U CN201920638865U CN210465691U CN 210465691 U CN210465691 U CN 210465691U CN 201920638865 U CN201920638865 U CN 201920638865U CN 210465691 U CN210465691 U CN 210465691U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Abstract
The utility model discloses a scanning mechanism, include the scanning mirror that uses a fulcrum to be the pivot point and rotate in the scope of personally submitting 0 ~ 90 with the horizontal plane, emergent light jets out perpendicularly or through scanning mirror reflection, the scanning mirror is a speculum, the speculum is including locating the outside speculum first part and separating the speculum second part that sets up in the middle part, the RMS value of speculum first part is less than 1/40 lambda; the RMS value of the second part of the mirror is less than 1/100 lambda. And simultaneously, the utility model discloses still disclose a no blind area atmosphere ozone detecting system, have above-mentioned scanning mechanism, can record 0 ~ 5000 m's ozone profile data.
Description
Technical Field
The utility model relates to a laser radar technical field, concretely relates to scanning mechanism and a no blind area atmosphere ozone detection system.
Background
In recent years, with the implementation of various measures for preventing particulate matter pollution, the concentrations of PM2.5, PM10, and the like have a tendency to decrease year by year, and the atmosphere has become cleaner and cleaner. However, with the enhancement of the penetration of solar ultraviolet rays, another invisible ozone pollution gradually becomes the main pollution in summer, and compared with particulate pollution, the prevention and control of ozone pollution has the characteristics of invisible, complex cause and difficult prevention, and becomes a difficult point for prevention and control in China and even the world.
At present, ground ozone monitoring mainly depends on monitoring methods such as an ozone analyzer and the like, the method can carry out statistical analysis on the atmospheric ozone concentration, the change trend and the like on the ground, for the detection of the ozone concentration in the near-ground area range, the traditional detection methods comprise detection methods such as an air sounding balloon carrying an ozone sensor, a mooring airship and the like, and the methods have the characteristics of long detection time, high labor cost, large field range, incapability of continuous long-time operation and the like. The atmospheric ozone detection laser radar is a new technical means for detecting ozone profile developed in recent years, utilizes a differential detection principle to invert the concentration of ozone by utilizing different absorption degrees of ozone to different wavelengths, has the characteristics of high timeliness, continuous unattended detection and the like, and is more and more emphasized by an environment monitoring department. In the current atmospheric ozone detection laser radar, due to the limitation of the design of an optical structure near the ground (generally within the range of 0-300 m) and the like, the problem that optical signals cannot be completely received exists, so that the problem that the inversion error of the near-end ozone concentration is too large to be practically applied is caused, and the problem is called as a 'blind area' in a laser radar system.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model aims at providing a cost performance is high, still can guarantee the scanning mirror of atmospheric laser facula quality and backscatter signal intensity of directive. And simultaneously, the utility model also provides a measurable no blind area atmosphere ozone detection system of relevant parameters such as near ground ozone concentration.
The utility model provides a pair of scanning mechanism, include:
and the scanning mirror rotates in a range of 0-90 degrees with a horizontal plane by taking a fulcrum as an axis point, and emergent light is vertically emitted or reflected by the scanning mirror.
Optionally, the scanning mirror is a mirror, the mirror includes a first mirror portion disposed at the outer portion and a second mirror portion spaced apart from the first mirror portion, and the RMS value of the first mirror portion is less than 1/40 λ; the RMS value of the second part of the mirror is less than 1/100 lambda.
Optionally, the first part of the reflector is axially symmetric, a circular notch is formed in the middle of the first part of the reflector, the second part of the reflector is a circular mirror surface matched with the circular notch of the first part of the reflector, the edge of the second part of the reflector is separated from the edge of the circular notch of the first part of the reflector, and the first part of the reflector and the second part of the reflector can rotate respectively.
Optionally, the mirror first portion and the mirror second portion are spaced apart by a distance of 2 mm.
Optionally, when the horizontal inclination angle of the first part of the reflector is 50 °, the horizontal projection is a regular octagon; the horizontal projection of the second part of the reflector is circular when the horizontal inclination angle is 50 degrees.
Optionally, the mirror material of the first and second portions of the mirror is BK 7; the mirror surface coating film of the first part of the reflector is a metal film, and the mirror surface coating film of the second part of the reflector is a dielectric film.
The utility model provides a no blind area atmosphere ozone detecting system, includes that the light path meets in proper order:
a laser;
a Raman tube to generate a desired wavelength;
the beam expander expands the light beam emitted by the laser;
a reflector for deflecting the light beam to change the optical path;
a scanning mirror, which makes the emergent light from the reflecting mirror vertically or reflected again;
the telescope receives the backscattered gas molecular optical signals;
the light filtering and splitting element filters excessive background light and guides the excessive background light into a light splitting light path;
the detector and the acquisition, processing and control module convert the optical signals into electric signals, acquire, transmit and process the electric signals.
Optionally, the laser wavelength generated by the laser is 266nm, raman light at 289nm and 316nm is generated in the raman tube, and the three wavelengths enter three detectors respectively to convert optical signals into electric signals.
The scanning mirror is provided with the scanning mirror structure, rotates within the range of 0-90 degrees by taking a pivot as an axis point, and emergent light is vertically emitted or reflected by the reflector.
Optionally, the first portion of the reflector has an inclination angle of 50 ° with respect to the horizontal, and the angle between the emitted laser light and the horizontal is 10 °.
The utility model discloses technical scheme has following advantage:
1. in the scanning mechanism provided by this embodiment, a fulcrum is taken as an axis point to rotate within a range of 0 to 90 degrees with respect to a horizontal plane, and the emergent light is emitted vertically or reflected by the scanning mirror. Furthermore, when the scanning mirror is divided into two parts, the RMS value of the outer mirror is set to be less than 1/40 lambda, the mirror coating is a metal film, the RMS value of the central mirror is set to be less than 1/100 lambda, and the mirror coating is a dielectric film, the quality of laser spots emitted to the atmosphere can be better ensured, so that the stability of echo signals is ensured, and the key effect on the accuracy of deduction of atmospheric gas concentration is achieved.
2. According to the atmospheric ozone remote sensing system without the blind zone, ultraviolet high-energy, narrow-pulse-width and low-repetition-frequency laser (266 nm laser is adopted in the embodiment, the single pulse energy of the laser is 100mJ, the pulse width is less than 15ns, and the frequency is less than 100Hz) emitted by a laser passes through an internal modulation or external Raman system or a plurality of different lasers, a plurality of wavelengths are emitted into the air after passing through a beam expander, and the difference value of the adjacent wavelengths is generally less than 30 nm. Ozone, aerosol and the like in the atmosphere interact with emitted laser to generate a backscattering echo, the backscattering echo is received by a large-caliber telescope (generally larger than 250mm, 300mm is adopted in the embodiment) and then enters a light splitting device through a quartz optical fiber (or directly) after being limited by a diaphragm, the light splitting device splits the received signal, signal lights with different wavelengths are received by different photomultiplier tubes, and the received signal is analyzed, inverted, drawn and displayed on a screen or other devices by a data analysis and control subsystem after being processed by a data acquisition subsystem. During specific work, within a time period of T1 (5 minutes in the embodiment), the unidirectional scanning mechanism 7 works vertically, light beams can directly shoot to the atmosphere after passing through the window glass 5, at the moment, the remote sensing system can acquire ozone profile data of 300-5000 m, and ozone data of the ground is acquired through the ozone analyzer; in the period of T2 (5 minutes in this embodiment), the unidirectional scanning mechanism is tilted by a certain angle, so that the laser works at an angle θ with the horizontal, where θ is 10 ° in this embodiment, when the laser is obliquely emitted into the atmosphere, ozone data with a height of 52m to 260m (500 mxsin 10 ° to 5000 mxsin 10 °) and ground data are obtained by the ozone analyzer, because the concentration of ozone is substantially consistent in a local range (square circle 1.5km range) and changes slowly in a short time (less than 10 minutes), and ozone data in a vertical state and a tilted state are combined, ozone profile data with a height of 0m to 5000m can be obtained in10 minutes (ground ozone analyzer, acquiring 52m to 260m in case of tilting 10 °, and acquiring 300m to 5000m in case of vertical state). At the same time, the laser can be emitted horizontally (θ is 0 °) if necessary, and a horizontal ozone concentration distribution in a local range can be obtained.
The system can also set the inclination angle of the unidirectional scanning mechanism according to the requirement to realize the horizontal ozone concentration measurement, and has an important effect on the discovery of the ozone pollution point source; besides inverting the ozone concentration, the inversion of data such as an atmospheric extinction coefficient, a backscattering coefficient and the like can be realized according to the weak absorption of ozone to a certain emission wavelength, and further data products such as a boundary layer and the like can be realized according to the size of the extinction coefficient, so that the functionality of the atmospheric ozone detection laser radar is enhanced; the ozone remote sensing data acquisition system can provide the ozone remote sensing data without blind areas from the ground to the high altitude for users, and can provide technical reference for the application of ozone radars and other types of radars.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a scanning mechanism;
FIG. 2 is a perspective view of the scanning mechanism at an angle of 50 to the horizontal;
FIG. 3 is a schematic view of the scanning mechanism;
FIG. 4 is a block diagram of an atmospheric ozone remote sensing system without blind zones.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
The scanning mechanism of this embodiment, as shown in fig. 1, includes a fixed base 701, a mechanical arm 702, an expansion link 703, a rotating shaft 704, a supporting frame 705, a scanning mirror 706, and the like, wherein the fixed base 701 is fixed to a system main body, one end of the mechanical arm 702 is connected to the fixed base 701, the other end of the mechanical arm 702 is connected to the rotating shaft 704 on the supporting frame 705, the mechanical arm 702 raises the whole part, one end of the expansion link 703 is connected to the upper half of the mechanical arm 702, the other end of the expansion link is connected to the supporting frame 705, the supporting frame 705 is fixed to the scanning mirror 706, the mirror surface of the scanning mirror 706 is divided into two parts a and b, both the part a and the part b can independently rotate within 0-90 degrees from the horizontal plane, the part b of the mirror surface is an axisymmetric octagon, two opposite sides of the octagon are longer than the other sides, the part a of the, the material of the reflecting mirror surface adopted by the part b is BK7, in order to reduce the weight of the system and reserve a corresponding space for the operation of the wiper 6, as shown in FIG. 2, the horizontal projection diagram of the part b when the part b is inclined by 50 degrees to the horizontal is a regular octagon, at this time, the outer edge of the mirror surface of the receiving telescope is internally or externally tangent to the projected regular octagon, in the embodiment, the side length of the octagon is 150mm, meanwhile, in order to enhance the strength of the reflecting mirror, the thickness of the material is more than 50mm, the glass surface is a plane, the RMS value of the mirror surface is less than 1/40 lambda (lambda is 632.8nm), and the mirror surface coating film can be a metal film which is relatively cheap, has high reflectivity and relatively low damage threshold, such as an enhanced aluminum film (the reflectivity of the wavelength in the; the reflecting mirror surface adopted by the part a is BK7, the angle of the part a can be independently adjusted, a horizontal projection drawing when the reflecting mirror surface is inclined by 50 degrees to the horizontal is approximately circular, the radius of the circular shape is 25mm, meanwhile, in order to enhance the strength of the reflecting mirror, the thickness of the material is more than 10mm, the surface of the glass is a plane, the RMS value of the mirror surface is less than 1/100 lambda (lambda is 632.8nm), the quality of laser spots emitted to the atmosphere can be better ensured, the mirror surface is plated with a dielectric film with high price, high reflectivity and high damage threshold value, such as aluminum oxide, silicon dioxide and the like, the reflectivity to the wavelength within the range of 200 nm-400 nm is more than 85 percent, the damage threshold value is more than 5J/cm2 (the laser wavelength is 266nm, the pulse width is 10ns, the frequency is 10Hz), and the.
Example 2
Referring to fig. 4, the system starts from a laser system emitting ultraviolet wavelength with high pulse energy, and in this embodiment, the system is composed of a laser 1 and a raman tube 2, wherein the laser 1 can emit pulse laser with good beam quality (the laser adopts a Q-smart850 type laser, the laser wavelength of which is 266nm, the frequency of which is 10Hz, the pulse energy of which is 100mJ, the pulse width of which is 5ns, the divergence angle of which is 0.5mrad, and the spot diameter of which is 9 mm). 266nm laser emitted from a laser 1 passes through a Raman tube 2, gas (pure deuterium with 10 atmospheric pressures is adopted in the embodiment) which is easy to generate Raman frequency shift is filled in the Raman tube, and after passing through the gas, 289nm and 316nm Raman lights are generated, the two Raman lights and 266nm laser emitted by the laser pass through a laser beam expander 3, the laser beam expander 3 expands the diameter of a laser beam from 9mm to 45mm, and then the laser is reflected to window glass 5 (the size of the window glass is 350mm) through a reflecting mirror 4, and the laser directly irradiates to the atmosphere or is reflected to the atmosphere through a unidirectional scanning mechanism 7 after passing through the window glass 5; laser generates certain back scattering signals after interacting with ozone, aerosol, atmospheric molecules and the like in the atmosphere, the signals are reflected (or directly enter) into a large-caliber telescope 8 (the caliber of the telescope is 300mm) through a unidirectional scanning mechanism 7, the signals are focused to a diaphragm 9 by the telescope 8, then the signals are received by a large-core-diameter optical fiber 10 (the optical fiber is a quartz optical fiber, and the core diameter is 1mm) and then are transmitted to a light splitting device 11 which can be placed according to requirements, wherein the light splitting device 11 adopts a high-resolution spectrometer, the signals with wavelengths of 266nm,289nm, 316nm and the like are respectively distributed to different detectors 12, 13 and 14 (a Hamamatsu photomultiplier tube with the model number of H10722 is adopted by the light splitting device 11), the detectors 12, 13 and 14 convert the amplified and multiplied light into electric signals, the electric signals are processed by an A/D circuit 15 and a filter circuit 16 and then reach a data analysis and control subsystem 18, the data analysis & control subsystem 18 is connected to the wiper 6, the unidirectional scanning mechanism 7, the laser 1, the ozone analyzer 17, and the display device 19 at the same time, where the ozone analyzer 17 is a pureir 40 type ultraviolet absorption O3 analyzer by beijing yifu and co-located science and technology limited, and the display device 19 is an associative display. During specific operation, the data analysis and control subsystem 18 controls the working state of the unidirectional scanning mechanism 7 according to the requirements, including scanning time, scanning angle, scanning step length and the like, and simultaneously controls the light emitting time and frequency of the laser 1, and obtains the return signal of the signal in the ozone laser radar after passing through the filter circuit 16 and the ground ozone data of the ozone analyzer 17, and completes the inversion of the complete ozone profile from the ground to the high altitude through the integration of the information. The output data product comprises original data of each wavelength, distance square data of each wavelength, extinction coefficient, backscattering coefficient, ozone concentration, boundary layer, signal to noise ratio and the like, the data are expressed in the form of pseudo color images (the abscissa is time, the ordinate is height, different ozone concentrations are represented by different chromaticities) and profile images (the abscissa is concentration/intensity, and the ordinate is height), and finally, the data analysis and control subsystem 18 can be used for setting timing (or judging according to signals) to drive the windshield wiper 6 to clean the window glass 5, so that signal loss caused by unclean surfaces of the window glass 5 is prevented.
Under the control of the data analysis and control subsystem 18, the basic composition and working mode of the unidirectional scanning mechanism 7 can be referred to as shown in fig. 1 and fig. 2, and it is composed of a fixed seat, a mechanical arm, a telescopic rod, a rotating shaft, a supporting frame, a scanning mirror, etc., the mirror surface of the scanning mirror is divided into two parts (a and b in the figure), a 2mm gap is left between the two parts, the part b adopts a reflecting mirror surface made of BK7, in order to be able to reduce the weight of the system and to reserve a corresponding space for the operation of the wiper 6, the horizontal projection of the portion b at an inclination of 50 ° to the horizontal is a regular octagon, the sides of which are 150mm, meanwhile, in order to enhance the strength of the reflector, the thickness of the material is more than 50mm, the surface of the glass is a plane, the RMS (root mean square) value of the mirror surface is less than 1/40 lambda (lambda is 632.8nm), and the mirror coating film can be a metal film which is relatively cheap, has high reflectivity and relatively low damage threshold (the reflectivity of the wavelength in the range of 200nm to 400nm is more than 85%); the material of the reflecting mirror surface adopted by the part a is BK7, the angle of the part a can be independently adjusted, a horizontal projection drawing which is inclined by 50 degrees with the horizontal is approximately circular, the radius of the circular is 25mm, meanwhile, in order to enhance the strength of the reflecting mirror, the thickness of the material is more than 10mm, the surface of the glass is a plane, the RMS value of the mirror surface is less than 1/100 lambda (lambda is 632.8nm), the quality of laser spots emitted to the atmosphere can be better ensured, the mirror surface is plated with a dielectric film which is high in price, reflectivity and damage threshold value, the reflectivity to the wavelength within the range of 200 nm-400 nm is more than 85%, the damage threshold value is more than 5J/cm2 (the laser wavelength is 266nm, the pulse width is 10ns, the frequency is 10Hz), and the mirror surfaces of the part a. During specific work, referring to fig. 3, in a time period T1 (5 minutes in this embodiment), the unidirectional scanning mechanism 7 works vertically, and a light beam passes through the window glass 5 and then directly emits to the atmosphere, so that the remote sensing system can acquire ozone profile data of 300-5000 m, and acquire ozone data of the ground through the ozone analyzer; in the period of T2 (5 minutes in this embodiment), the unidirectional scanning mechanism is tilted at a certain angle, the laser is operated at an angle θ (θ is 10 ° in this embodiment), and at this time, the laser is obliquely emitted into the atmosphere, so that ozone data with a height of 52m to 260m (500 mxsin 10 ° to 5000 mxsin 10 °) and ground data can be obtained by the ozone analyzer, and since the concentration of ozone is substantially consistent in a local range (square circle 1.5km range) and changes slowly in a short time (less than 10 minutes), and ozone data in a vertical state and a tilted state are combined, ozone profile data of 0m to 5000m can be obtained in10 minutes (ground ozone analyzer, obtaining 52m to 260m in the case of tilting 10 °, and obtaining 300m to 5000m in the vertical state). At the same time, the laser can be emitted horizontally (θ is 0 °) if necessary, and a horizontal ozone concentration distribution in a local range can be obtained.
Meanwhile, the data analysis and control subsystem is provided with a plurality of detection control interfaces, so that the light emitting and receiving time of the system, the inclination angle and the scanning time of the unidirectional scanning mechanism, the data uploading of the ground ozone analyzer and the like can be controlled, enough data acquisition space can be reserved for subsequent windshield wipers, camera monitoring and the like, the acquired data can form a relatively complete data chain, and the inverted data can cover 0-5 km of seamless data.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (9)
1. A scanning mechanism, comprising:
the scanning mirror rotates in a range of 0-90 degrees with a horizontal plane by taking a fulcrum as an axis point, and emergent light is vertically emitted or reflected by the scanning mirror; the scanning mirror is a reflecting mirror, the reflecting mirror comprises a first reflecting mirror part arranged at the outer part and a second reflecting mirror part which is arranged at the middle part in a separating way, and the RMS value of the first reflecting mirror part is less than 1/40 lambda; the RMS value of the second part of the mirror is less than 1/100 lambda.
2. A scanning mechanism according to claim 1, wherein the first mirror portion is axially symmetrical and has a circular recess in its middle, the second mirror portion is a circular mirror surface adapted to the circular recess of the first mirror portion and has an edge spaced from the edge of the circular recess of the first mirror portion, and the first and second mirror portions are rotatable, respectively.
3. A scanning mechanism according to claim 2, wherein the first and second portions of the mirror are spaced apart by a distance of less than 10 mm.
4. A scanning mechanism according to claim 2, wherein the mirror first portion has a regular octagonal horizontal projection at a horizontal tilt angle of 50 °; the horizontal projection of the second part of the reflector is circular when the horizontal inclination angle is 50 degrees.
5. The scanning mechanism as claimed in claim 1, wherein the mirror material of the first and second portions of the mirror is BK 7; the mirror surface coating film of the first part of the reflector is a metal film, and the mirror surface coating film of the second part of the reflector is a dielectric film.
6. The utility model provides a no blind area atmosphere ozone detecting system which characterized in that, including the light path meets in proper order:
a laser;
a Raman tube to generate a desired wavelength;
the beam expander expands the light beam emitted by the laser;
a reflector for deflecting the light beam to change the optical path;
a scanning mirror, which makes the emergent light from the reflecting mirror vertically or reflected again;
the telescope receives the optical signal backscattered by the atmosphere;
the light filtering and splitting element filters excessive background light and guides the excessive background light into a light splitting light path;
the detector and the acquisition, processing and control module convert the optical signals into electric signals, acquire, transmit and process the electric signals.
7. The system of claim 6, wherein the laser wavelength generated by the laser is 266nm, the Raman tube generates 289nm Raman light and 316nm Raman light, and the three wavelengths enter three detectors respectively to convert the optical signals into electrical signals.
8. The blind zone-free atmospheric ozone detection system as claimed in claim 6, wherein the scanning mirror has a scanning mirror structure as claimed in any one of claims 1 to 5.
9. The system according to any one of claims 6 to 8, wherein the first part of the reflector has an inclination angle of 50 ° with respect to the horizontal, and the angle between the emitted laser beam and the horizontal is 10 °.
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| CN201920638865.9U CN210465691U (en) | 2019-05-07 | 2019-05-07 | Scanning mechanism and non-blind area atmosphere ozone detection system |
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| CN201920638865.9U CN210465691U (en) | 2019-05-07 | 2019-05-07 | Scanning mechanism and non-blind area atmosphere ozone detection system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113296122A (en) * | 2021-05-20 | 2021-08-24 | 安徽大学 | Laser radar quality control device |
| CN113310862A (en) * | 2021-05-28 | 2021-08-27 | 中国矿业大学 | Device and method for continuously detecting air particles based on Raman spectrum |
-
2019
- 2019-05-07 CN CN201920638865.9U patent/CN210465691U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113296122A (en) * | 2021-05-20 | 2021-08-24 | 安徽大学 | Laser radar quality control device |
| CN113310862A (en) * | 2021-05-28 | 2021-08-27 | 中国矿业大学 | Device and method for continuously detecting air particles based on Raman spectrum |
| CN113310862B (en) * | 2021-05-28 | 2022-03-22 | 中国矿业大学 | Device and method for continuously detecting air particles based on Raman spectrum |
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