CN215414910U - Laser smoke concentration measuring device - Google Patents
Laser smoke concentration measuring device Download PDFInfo
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- CN215414910U CN215414910U CN202121360440.XU CN202121360440U CN215414910U CN 215414910 U CN215414910 U CN 215414910U CN 202121360440 U CN202121360440 U CN 202121360440U CN 215414910 U CN215414910 U CN 215414910U
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- insulation block
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Abstract
The utility model relates to the field of measuring devices and discloses a laser smoke concentration measuring device, wherein a laser emitting device emits a laser beam, the laser beam enters a measuring air chamber after passing through a laser window lens, external smoke is introduced into the measuring air chamber, the laser beam passes through a second light path of a receiving heat insulation block after being scattered by the smoke and then enters a receiving device for measurement after passing through the receiving window lens, the influence of external heat on light can be isolated through the laser heat insulation block and the receiving heat insulation block, the structure is compact, the installation is simple, the severe environment resistance is realized, the cost is low, the maintenance amount is small, the sensitivity of an instrument is effectively improved, and the original back scattering dense smoke concentration is realizedLower limit of detection (5-10) mg/m3Increasing the concentration of the forward scattering smoke to the lower limit (0-5) mg/m3Ultrahigh sensitivity, minimum detection limit of 0.05mg/m3。
Description
Technical Field
The utility model relates to the field of measuring devices, in particular to a laser smoke concentration measuring device.
Background
At present, particulate matter measuring devices in domestic markets adopt a back scattering principle, an instrument emits a laser signal to penetrate through a flue and irradiate smoke dust particles, the irradiated smoke dust particles reflect the laser signal, the intensity of the reflected signal and the concentration of the smoke dust are changed positively, and the concentration of the smoke dust in the flue can be calculated through a specific algorithm. The principle has the defects that the intensity of a laser signal reflected by smoke particles is weak, the sensitivity is low, the emission of some ultra-low smoke cannot be detected, the laser directly passes through the flue and is greatly interfered by the outside, and the reflected signal generated by the flue wall can be received by the instrument, so that the inspection of the instrument on the real smoke concentration in the flue is interfered.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a laser smoke concentration measuring device, which aims to use irradiated smoke particles to reflect laser signals, maintain a specific angle during receiving to obtain the strongest reflected signals, and then laser is emitted into an independent measuring air chamber, is completely isolated from the outside and is not interfered by external factors, so that the sensitivity level precision of the instrument can be greatly improved.
In order to achieve the above object, the present invention provides a laser smoke concentration measuring device, which comprises a measuring air chamber, a laser emitting device, a laser window lens, a laser heat insulation block, a receiving device, a receiving window lens and a receiving heat insulation block, wherein the laser window lens is arranged on one side of the laser emitting device, the laser heat insulation block is provided with a first light path, the laser heat insulation block is arranged on one side of the laser window lens away from the laser emitting device, the first light path and the laser emitting device are positioned on the same axis, the measuring air chamber is arranged on one side of the laser heat insulation block, the receiving heat insulation block is provided with a second light path, the receiving heat insulation block is arranged on one side of the measuring air chamber, the first light path, the measuring air chamber and the second light path are communicated, the receiving window lens is arranged on one side of the second light path away from the measuring air chamber, the receiving device is arranged on one side of the receiving window lens and is positioned on the same axis with the second light path.
The measuring air chamber comprises an air chamber body and a cover plate, the air chamber body is provided with a smoke inlet, and the cover plate is rotatably connected with the air chamber body and is positioned on one side of the air chamber body.
The smoke inlet allows external smoke to enter the air chamber body, the air chamber body is provided with a through hole corresponding to the cover plate, and the cover plate can be opened to clean the inside of the air chamber body.
The laser emitting device comprises an emitter and an emitting shell, the laser window lens is fixedly connected with the emitting shell, and the emitter is arranged in the emitting shell.
The emitter may emit laser light, the emitter being protected by the emitting housing.
Wherein, the laser emitting device further comprises a tab which is rotatably arranged at one side of the emitter.
The angle of the laser emitted by the emitter can be adjusted through the adjusting sheet, so that the laser can be located on the same axis with the first light path.
The laser window lens comprises a lens body and an installation handle, wherein the installation handle is fixedly connected with the lens body and is positioned on one side of the lens body.
The lens body allows light to pass through, and the lens body can be more conveniently disassembled and assembled through the installation handle.
The laser heat insulation block and the receiving heat insulation block are provided with air nozzles, and the air nozzles are arranged on one sides of the laser heat insulation block and the receiving heat insulation block.
An external air tube may be connected to the air tap so that air is blown in from the outside to clean the laser window lens.
The receiving device comprises a receiving ring, a receiving lens, a limiting cover and a light intensity sensor, the receiving ring is arranged on one side of the receiving window lens, the limiting cover is arranged on one side of the receiving ring, the receiving lens is clamped between the receiving ring and the limiting cover, and the light intensity sensor is arranged on one side, far away from the receiving lens, of the limiting cover.
Through the receiving ring with spacing cover is to the position of receiving lens carries out the block, makes the convenience with receiving lens fixes in the assigned position, and light passes through is focused on behind the receiving lens on the light intensity sensor, can pass through light intensity sensor converts the light intensity signal into the signal of telecommunication, thereby measures the smoke and dust concentration.
According to the laser smoke concentration measuring device, the laser emitting device emits laser beams, the laser beams enter the measuring air chamber after passing through the laser window lens, external smoke is introduced into the measuring air chamber, the laser beams pass through the second light path of the receiving heat insulation block after being scattered by the smoke, then enter the receiving device after passing through the receiving window lens for measurement, the influence of external heat on light can be isolated through the laser heat insulation block and the receiving heat insulation block, the laser smoke concentration measuring device is compact in structure, simple to install, resistant to severe environment, low in cost and small in maintenance amount, the sensitivity of the instrument is effectively improved, and the lower limit (5-10) mg/m of the original backscattered smoke concentration detection is adopted3Increasing the concentration of the forward scattering smoke to the lower limit (0-5) mg/m3Ultrahigh sensitivity, minimum detection limit of 0.05mg/m3。
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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an exploded view of a laser soot concentration measuring device of the present invention;
FIG. 2 is a schematic cross-sectional view of a laser soot concentration measuring device of the present invention;
fig. 3 is a structural diagram of a laser smoke density measuring apparatus of the present invention.
1-measuring air chamber, 2-laser emitting device, 3-laser window lens, 4-laser heat insulation block, 5-receiving device, 6-receiving window lens, 7-receiving heat insulation block, 11-air chamber body, 12-cover plate, 21-emitter, 22-emitting shell, 23-adjustment sheet, 31-lens body, 32-installation handle, 41-first light channel, 42-air nozzle, 51-receiving ring, 52-receiving lens, 53-limit cover, 54-light intensity sensor, 71-second light channel and 111-smoke inlet hole.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 3, the present invention provides a laser soot concentration measuring device:
the device comprises a measuring air chamber 1, a laser emitting device 2, a laser window lens 3, a laser heat insulation block 4, a receiving device 5, a receiving window lens 6 and a receiving heat insulation block 7, wherein the laser window lens 3 is arranged on one side of the laser emitting device 2, the laser heat insulation block 4 is provided with a first light path 41, the laser heat insulation block 4 is arranged on one side of the laser window lens 3 far away from the laser emitting device 2, the first light path 41 and the laser emitting device 2 are positioned on the same axis, the measuring air chamber 1 is arranged on one side of the laser heat insulation block 4, the receiving heat insulation block 7 is provided with a second light path 71, the receiving heat insulation block 7 is arranged on one side of the measuring air chamber 1, the first light path 41, the measuring air chamber 1 and the second light path 71 are communicated, the receiving window lens 6 is arranged on one side of the second light path 71 far away from the measuring air chamber 1, the receiving means 5 is arranged on one side of the receiving window lens 6 and is located on the same axis as the second light path 71.
In this embodiment, the laser emitting device 2 emits a laser beam, the laser beam enters the measuring air chamber 1 through the laser window lens 3, external smoke is introduced into the measuring air chamber 1, the laser beam passes through the second light path 71 of the receiving heat insulation block 7 after being scattered by the smoke, and then enters the receiving device 5 through the receiving window lens 6 for measurement, the influence of external heat on light can be isolated through the laser heat insulation block 4 and the receiving heat insulation block 7, the structure is compact, the installation is simple, the harsh environment is resisted, the cost is low, the maintenance amount is small, the sensitivity of the instrument is effectively improved, and the lower limit (5-10) mg/m of the concentration detection of the original backscattered smoke is adopted3Increasing the concentration of the forward scattering smoke to the lower limit (0-5) mg/m3Ultrahigh sensitivity, minimum detection limit of 0.05mg/m3。
Further, the measurement air chamber 1 comprises an air chamber body 11 and a cover plate 12, the air chamber body 11 is provided with a smoke inlet 111, and the cover plate 12 is rotatably connected with the air chamber body 11 and is located on one side of the air chamber body 11.
In this embodiment, the smoke inlet 111 allows external smoke to enter the interior of the air chamber body 11, the air chamber body 11 has a through hole corresponding to the cover plate 12, and the cover plate 12 can be opened to clean the interior of the air chamber body 11.
Further, the laser emitting device 2 comprises an emitter 21 and an emitting shell 22, the laser window lens 3 is fixedly connected with the emitting shell 22, and the emitter 21 is arranged in the emitting shell 22; the laser emitting device 2 further comprises a tab 23, and the tab 23 is rotatably arranged on one side of the emitter 21.
In the embodiment, the emitter 21 is LB-01245/LG, the emitter 21 can emit laser, and the emitter 21 is protected by the emitting shell 22. The angle of the laser emitted from the emitter 21 can be adjusted by the tab 23, so that the laser can be located on the same axis as the first light path 41.
Further, the laser window lens 3 includes a lens body 31 and a mounting handle 32, and the mounting handle 32 is fixedly connected to the lens body 31 and is located on one side of the lens body 31.
In this embodiment, the lens body 31 allows light to pass through, and the lens body 31 can be more easily attached and detached by the mounting stem 32.
Further, the laser heat insulation block 4 and the receiving heat insulation block 7 are both provided with air nozzles 42, and the air nozzles 42 are arranged on one sides of the laser heat insulation block 4 and the receiving heat insulation block 7.
In this embodiment, an external air tube may be connected to the air nozzle 42 to blow air from the outside to clean the laser window glass 3.
Further, the receiving device 5 includes a receiving ring 51, a receiving lens 52, a limit cover 53, and a light intensity sensor 54, the receiving ring 51 is disposed on one side of the receiving window lens 6, the limit cover 53 is disposed on one side of the receiving ring 51, the receiving lens 52 is engaged between the receiving ring 51 and the limit cover 53, and the light intensity sensor 54 is disposed on one side of the limit cover 53 away from the receiving lens 52.
In this embodiment, the model of the light intensity sensor 54 is BH1750FVI-TR, the position of the receiving lens 52 is engaged with the receiving ring 51 and the limiting cover 53, so that the receiving lens 52 is conveniently fixed at a predetermined position, light is focused on the light intensity sensor 54 after passing through the receiving lens 52, and a light intensity signal can be converted into an electric signal by the light intensity sensor 54, so as to measure the smoke concentration.
While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model.
Claims (7)
1. A laser smoke concentration measuring device is characterized in that,
the device comprises a measuring air chamber, a laser emitting device, a laser window lens, a laser heat insulation block, a receiving device, a receiving window lens and a receiving heat insulation block, wherein the laser window lens is arranged on one side of the laser emitting device, the laser heat insulation block is provided with a first light path, the laser heat insulation block is arranged on one side, far away from the laser emitting device, of the laser window lens, the first light path and the laser emitting device are positioned on the same axis, the measuring air chamber is arranged on one side of the laser heat insulation block, the receiving heat insulation block is provided with a second light path, the receiving heat insulation block is arranged on one side of the measuring air chamber, the first light path, the measuring air chamber and the second light path are communicated, the receiving window lens is arranged on one side, far away from the measuring air chamber, of the second light path, and the receiving device is arranged on one side of the receiving window lens, and is located on the same axis as the second light path.
2. The laser soot concentration measuring apparatus of claim 1,
the measuring air chamber comprises an air chamber body and a cover plate, the air chamber body is provided with a smoke inlet, and the cover plate is rotatably connected with the air chamber body and is positioned on one side of the air chamber body.
3. The laser soot concentration measuring apparatus of claim 1,
the laser emitting device comprises an emitter and an emitting shell, the laser window lens is fixedly connected with the emitting shell, and the emitter is arranged in the emitting shell.
4. The laser soot concentration measuring apparatus of claim 3,
the laser emitting device further comprises a regulating sheet which is arranged on one side of the emitter in a rotating mode.
5. The laser soot concentration measuring apparatus of claim 1,
the laser window lens comprises a lens body and an installation handle, wherein the installation handle is fixedly connected with the lens body and is positioned on one side of the lens body.
6. The laser soot concentration measuring apparatus of claim 1,
the laser heat insulation block with receive the heat insulation block and all have the air cock, the air cock sets up the laser heat insulation block with receive one side of heat insulation block.
7. The laser soot concentration measuring apparatus of claim 1,
the receiving device comprises a receiving ring, a receiving lens, a limiting cover and a light intensity sensor, wherein the receiving ring is arranged on one side of the receiving window lens, the limiting cover is arranged on one side of the receiving ring, the receiving lens is clamped between the receiving ring and the limiting cover, and the light intensity sensor is arranged on one side of the receiving lens, far away from the limiting cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121360440.XU CN215414910U (en) | 2021-06-18 | 2021-06-18 | Laser smoke concentration measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121360440.XU CN215414910U (en) | 2021-06-18 | 2021-06-18 | Laser smoke concentration measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215414910U true CN215414910U (en) | 2022-01-04 |
Family
ID=79640166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121360440.XU Active CN215414910U (en) | 2021-06-18 | 2021-06-18 | Laser smoke concentration measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215414910U (en) |
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2021
- 2021-06-18 CN CN202121360440.XU patent/CN215414910U/en active Active
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