CN209858384U - Device for optical detection of ultra-low smoke dust - Google Patents
Device for optical detection of ultra-low smoke dust Download PDFInfo
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- CN209858384U CN209858384U CN201920380765.0U CN201920380765U CN209858384U CN 209858384 U CN209858384 U CN 209858384U CN 201920380765 U CN201920380765 U CN 201920380765U CN 209858384 U CN209858384 U CN 209858384U
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Abstract
The utility model discloses a device for ultralow smoke and dust optical detection, include: the device comprises a measuring bin, a laser generating device, a lens focusing device, a measuring optical fiber and an optical trap; one side of the measuring bin is sequentially connected with a lens focusing device and a laser generating device, the other side of the measuring bin is connected with an optical trap, and the measuring bin is also provided with a sample gas inlet which is used for connecting a sample gas branch for providing sample gas; the light path of the laser and the gas path of the sample gas are vertically crossed in the measuring bin, and the measuring optical fiber is connected to the crossed area of the light path and the gas path in the measuring bin. The utility model provides a device global design is small and exquisite, rationally distributed, the high and convenient maintenance of SNR for ultra-low smoke and dust optical detection, can be applicable to the online smoke and dust analysis of ultralow emission, high humidity, can effective analysis realize real-time supervision environmental data through the device's appearance gas.
Description
Technical Field
The utility model relates to an environmental monitoring technical field, more specifically say, relate to a device for ultralow smoke and dust optical detection.
Background
With the progress of society and the development of science and technology and the expansion of industrialization, the pollution of atmospheric environment is more and more serious, and the real-time monitoring on atmospheric pollution, especially the particulate pollution, is more important. Among the major sources of particulate matter are various industrial emissions of soot. Soot is a solid particulate emitted during industrial processes. The harm of smoke to human body is related to the size of particulate matter:
(1) particles larger than 5 microns are retained by nasal hair and respiratory mucus.
(2) Particles smaller than 0.5 microns generally adhere to the upper airway surface and are excreted with the sputum.
(3) The particles with a diameter of 0.5-5 microns are the most harmful to human body. It can not only deposit in the lung, but also directly enter the blood to reach all parts of the human body.
Since various harmful substances are adhered to the surface of the dust particles, once the dust particles enter a human body, various respiratory diseases can be caused.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the utility model provides a device for ultralow smoke and dust optical detection can carry out the analysis to the smoke and dust effectively, the real-time supervision ambient air condition.
The utility model provides a pair of a device for ultralow smoke and dust optical detection, include:
the device comprises a measuring bin, a laser generating device, a lens focusing device, a measuring optical fiber and an optical trap;
the lens focusing device and the laser generating device are sequentially connected to one side of the measuring bin, the optical trap is connected to the other side of the measuring bin, and a sample gas inlet is formed in the measuring bin and used for being connected with a sample gas branch for providing sample gas;
the light path of the laser and the gas path of the sample gas are vertically crossed in the measuring bin, and the measuring optical fiber is connected to the crossed area of the light path and the gas path in the measuring bin;
laser emitted by the laser generating device is focused on the cross area through the lens focusing device, so that after the smoke dust particles in the sample gas in the cross area are reflected by the laser, reflected signals of the smoke dust particles can be received by the measuring optical fiber.
Optionally, a first mounting hole is formed in one side of the measuring bin, and is used for detachably mounting the lens focusing device;
and the other side of the measuring bin is provided with a second mounting hole for detachably mounting the optical trap.
Optionally, the lens focusing device includes a lens mounting seat and a lens assembly, the lens mounting seat is detachably mounted on one side of the measurement bin through the first mounting hole, and the lens assembly is mounted on one side of the lens mounting seat close to the measurement bin;
the laser generating device is arranged on one side, far away from the measuring bin, of the lens mounting seat.
Optionally, a lens pressing seat is further arranged outside the measuring bin, and one end of the lens pressing seat wraps the lens mounting seat and is embedded into the measuring bin to fix the lens mounting seat.
Optionally, the lens assembly includes a first plano-convex lens, a second plano-convex lens and a lens spacer ring, and the first plano-convex lens and the second plano-convex lens are symmetrically mounted on the lens mount through the lens spacer ring;
the first plano-convex lens is used for converting laser generated by the laser generating device into parallel light, and the second plano-convex lens is used for focusing the parallel light on the intersection area.
Optionally, a lens protection ring of a cone structure is further disposed on a side of the second plano-convex lens close to the measurement chamber, for protecting the second plano-convex lens from being contaminated by the sample gas.
Optionally, the measurement optical fiber is disposed at the top of the measurement bin, and the sample gas branch is disposed at the back of the measurement bin.
Optionally, the back of the measurement bin is further fixedly connected with a fixing plate, and the fixing plate is provided with a third mounting hole communicated with the sample gas inlet for mounting the sample gas branch.
Optionally, a heater mounting hole and a temperature sensor mounting hole are further formed in the measuring bin, and are used for mounting the heater and the temperature sensor respectively.
Optionally, the laser generating device comprises a laser fiber.
According to the technical scheme provided by the utility model, the utility model discloses following beneficial effect has:
the utility model provides a device global design is small and exquisite, rationally distributed, the high and convenient maintenance of SNR for ultra-low smoke and dust optical detection, can be applicable to the online smoke and dust analysis of ultralow emission, high humidity, can effective analysis realize real-time supervision environmental data through the device's appearance gas.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic structural diagram of an apparatus for optical detection of ultra-low smoke according to an embodiment of the present invention;
fig. 2 is a front view of an apparatus for optical detection of ultra-low smoke according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of an apparatus for optical detection of ultra-low smoke according to an embodiment of the present invention;
fig. 4 is an enlarged schematic structural view of an apparatus for optical detection of ultra-low smoke according to an embodiment of the present invention;
fig. 5 is a side cross-sectional view of an apparatus for optical detection of ultra-low smoke according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.
Referring to fig. 1 to 5, an embodiment of the present invention provides an apparatus for optical detection of ultra-low smoke, including: the device comprises a measuring bin, a laser generating device, a lens focusing device, a measuring optical fiber and an optical trap;
the lens focusing device 3 and the laser generating device 2 are sequentially connected to one side of the measuring bin 1, the optical trap 5 is connected to the other side of the measuring bin 1, and a sample gas inlet 11 is further formed in the measuring bin 1 and used for being connected with a sample gas branch for providing sample gas; the laser generated by the laser generator 2 sequentially passes through the lens focusing device 3 and the measuring bin 1, reaches the optical trap 5 and is absorbed by the optical trap 5, so as to form a laser path; the optical trap 5 can effectively absorb laser reaching the position of the optical trap, and reflection of the laser is avoided. The sample gas of the sample gas branch enters from a sample gas inlet 11 at one end of the measuring bin 1, passes through the gas path in the measuring bin 1, and then exits from a sample gas outlet 12 at the other end of the measuring bin 1. In addition, a reference measurement optical fiber 4 is further disposed on the measurement bin 1, and is mainly used for performing reference measurement on the laser emitted by the laser generation device 2 so as to adjust the laser emitted by the laser generation device 2.
The optical path of the laser and the gas path of the sample gas vertically intersect in the measuring bin 1, and the measuring optical fiber 4 is connected to the intersection area of the optical path and the gas path in the measuring bin 1; the laser emitted by the laser generating device 2 is focused on the cross area through the lens focusing device 3, so that after the smoke particles in the sample gas in the cross area are reflected by the laser, the reflected signals can be received by the measuring optical fiber 4, and the analysis of the smoke particles is realized. The light path of the laser and the gas path of the sample gas are vertically crossed, the laser vertically penetrates through the gas path of the sample gas, the contact area of the laser and smoke dust in the sample gas can be increased, and the reflection signal received by the measuring optical fiber 4 is effectively increased.
In an exemplary scheme provided by the embodiment of the present invention, a first mounting hole is provided at one side of the measuring chamber 1 for detachably mounting the lens focusing device 3; the other side of the measuring bin 1 is provided with a second mounting hole for detachably mounting the optical trap 5; the lens focusing device 3 and the optical trap 5 are coaxially arranged on two sides of the measuring bin 1, so that a light path can vertically penetrate through a gas path.
The lens focusing device 3 may specifically include a lens mounting seat 31 and a lens assembly 32, the lens mounting seat 31 is detachably mounted on one side of the measurement chamber 1 through the first mounting hole, and the lens assembly 32 is mounted on one side of the lens mounting seat 31 close to the measurement chamber 1; the laser generating device 2 is installed on one side, far away from the measuring bin 1, of the lens mounting seat 31, and the laser generating device 2 can be a laser fiber and is directly inserted into the lens mounting seat 31 and screwed to achieve mounting and fixing. Specifically, the measuring chamber 1 may be further provided with a lens pressing seat 33, the lens pressing seat 33 is of a circular ring structure, one end of the lens pressing seat 33 wraps the lens mounting seat 31 and is embedded in the measuring chamber 1, the other end of the lens pressing seat 33 is exposed out of the measuring chamber 1, and the lens mounting seat 31 can be screwed and fixed by rotating the portion of the lens pressing seat 33 exposed out of the measuring chamber 1.
The lens assembly 32 specifically includes a first plano-convex lens 321, a second plano-convex lens 322 and a lens spacer 323, the first plano-convex lens 321 and the second plano-convex lens 322 are symmetrically mounted on the lens mount 31 through the lens spacer 323, and the first plano-convex lens 321 and the second plano-convex lens 322 are placed in opposite directions; the first plano-convex lens 321 is configured to convert the laser light generated by the laser generator 2 into parallel light, and the second plano-convex lens 322 is configured to focus the parallel light on the intersection region. Through the combination of the first plano-convex lens 321 and the second plano-convex lens 322, the point light source of the laser fiber can be changed into parallel light and then into focused light, so that the light source can be concentrated to the maximum extent, and the detection effect is improved.
Since the lens focusing device 3 is connected to the measuring chamber 1, the lens focusing device 3 actually functions to focus and seal the gas in the measuring chamber 1, i.e. the sample gas in the measuring chamber 1 is in direct contact with the lens focusing device 3. Therefore, in order to prevent the second plano-convex lens 322 from being contaminated by the sample gas in the measurement chamber 1 and affecting the focusing effect of the laser, a lens protection ring 324 of a cone structure is further disposed on a side of the second plano-convex lens 322 close to the measurement chamber for protecting the second plano-convex lens 322 from being contaminated by the sample gas.
The embodiment of the utility model provides an in the exemplary scheme that provides, lens focusing device 3 and light trap 5 can set up respectively in measure the left and right sides in storehouse 1, measure optic fibre 4 set up in measure the top in storehouse 1 and visit into the cross region who measures 1 inside light path in storehouse and gas circuit from measuring 1 top in storehouse, the appearance gas branch road set up in measure the back in storehouse 1, the front of measuring 1 storehouse can set up the export of appearance gas. Through the structural design, the vertical crossing of the light path and the gas path can be ensured, and the measurement optical fiber 4 can be ensured to accurately measure the reflection signal of the crossing area.
In addition, for the convenience of fixed measuring storehouse 1 and easy to assemble sample gas branch road, the back of measuring storehouse 1 is fixedly connected with fixed plate 7 still, be provided with on the fixed plate 7 with the communicating third mounting hole 71 of sample gas import 11 is used for the installation sample gas branch road is provided with a plurality of fixed orificess that are used for the fixed access to measure the sample gas branch road of storehouse 1 around third mounting hole 71, and sample gas branch road is inserting sample gas import 11 and after screwing, and the solid fixed ring in the sample gas branch road pipeline outside then can be fixed on fixed plate 7 through cooperating with the fixed orifices (for example with the screw with solid fixed ring and fixed orifices fixed), guarantees the installation reliability of sample gas branch road.
Further, a heater mounting hole 13 and a temperature sensor mounting hole 14 are further formed in the measuring chamber 1, and are used for mounting a heater and a temperature sensor respectively. Heater and temperature sensor cooperation use for with measure storehouse 1 and heat and maintain in invariable temperature range, can effectively get rid of the moisture in the sample gas, guarantee that the sample gas does not condense, be favorable to the detection of sample gas.
The embodiment of the utility model provides a device global design is small and exquisite, rationally distributed, temperature compensation is stable, the signal to noise ratio is high, dismantle convenient and easy to maintain for ultralow smoke and dust optical detection's device, is applicable to the online smoke and dust analysis of ultralow emission, high humidity, can be applicable to the online smoke and dust analysis of ultralow emission, high humidity, can effective analysis pass through the device's sample gas, realizes real-time supervision environmental data.
While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (10)
1. An apparatus for optical detection of ultra-low smoke, comprising:
the device comprises a measuring bin, a laser generating device, a lens focusing device, a measuring optical fiber and an optical trap;
the lens focusing device and the laser generating device are sequentially connected to one side of the measuring bin, the optical trap is connected to the other side of the measuring bin, and a sample gas inlet is formed in the measuring bin and used for being connected with a sample gas branch for providing sample gas;
the light path of the laser and the gas path of the sample gas are vertically crossed in the measuring bin, and the measuring optical fiber is connected to the crossed area of the light path and the gas path in the measuring bin;
laser emitted by the laser generating device is focused on the cross area through the lens focusing device, so that after the smoke dust particles in the sample gas in the cross area are reflected by the laser, reflected signals of the smoke dust particles can be received by the measuring optical fiber.
2. The apparatus of claim 1, wherein a first mounting hole is provided at one side of the measuring chamber for detachably mounting the lens focusing device;
and the other side of the measuring bin is provided with a second mounting hole for detachably mounting the optical trap.
3. The apparatus of claim 2, wherein said lens focusing means comprises a lens mount and a lens assembly, said lens mount being detachably mounted to one side of said measuring chamber through said first mounting hole, said lens assembly being mounted to one side of said lens mount adjacent to said measuring chamber;
the laser generating device is arranged on one side, far away from the measuring bin, of the lens mounting seat.
4. The apparatus according to claim 3, wherein a lens pressing seat is further disposed outside the measuring chamber, and one end of the lens pressing seat covers the lens mounting seat and is embedded into the measuring chamber for fixing the lens mounting seat.
5. The apparatus according to claim 3 or 4, wherein the lens assembly comprises a first plano-convex lens, a second plano-convex lens and a lens spacer ring, and the first plano-convex lens and the second plano-convex lens are symmetrically mounted on the lens mounting seat through the lens spacer ring;
the first plano-convex lens is used for converting laser generated by the laser generating device into parallel light, and the second plano-convex lens is used for focusing the parallel light on the intersection area.
6. The apparatus of claim 5, wherein a cone-shaped lens protection ring is further disposed on a side of the second plano-convex lens close to the measuring chamber for protecting the second plano-convex lens from being contaminated by the sample gas.
7. The apparatus of claim 1, wherein the measurement fiber is disposed at the top of the measurement chamber, and the sample gas branch is disposed at the back of the measurement chamber.
8. The apparatus according to claim 7, wherein a fixing plate is fixedly connected to a back surface of the measuring chamber, and a third mounting hole communicated with the sample gas inlet is formed in the fixing plate, and is used for mounting the sample gas branch.
9. The apparatus of claim 1, wherein the measuring chamber is further provided with a heater mounting hole and a temperature sensor mounting hole for mounting a heater and a temperature sensor, respectively.
10. The apparatus of claim 1, wherein said laser generating means comprises a laser fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920380765.0U CN209858384U (en) | 2019-03-25 | 2019-03-25 | Device for optical detection of ultra-low smoke dust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920380765.0U CN209858384U (en) | 2019-03-25 | 2019-03-25 | Device for optical detection of ultra-low smoke dust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209858384U true CN209858384U (en) | 2019-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920380765.0U Active CN209858384U (en) | 2019-03-25 | 2019-03-25 | Device for optical detection of ultra-low smoke dust |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209858384U (en) |
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2019
- 2019-03-25 CN CN201920380765.0U patent/CN209858384U/en active Active
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Address after: 518100 Room 301, building 2, runheng Industrial Zone, No. 1, Liuxian Third Road, Xingdong community, Xin'an street, Bao'an District, Shenzhen, Guangdong Province Patentee after: Bixing IOT Technology (Shenzhen) Co.,Ltd. Address before: 2-3 / F, building 2, runheng Dingfeng Industrial Park, Liuxian 2nd Road, Xin'an street, Bao'an District, Shenzhen, Guangdong 518000 Patentee before: ZTE INSTRUMENTS (SHENZHEN) Co.,Ltd. |