CN114965193A - Atmospheric particulate on-line monitoring device based on beta-ray method - Google Patents
Atmospheric particulate on-line monitoring device based on beta-ray method Download PDFInfo
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- CN114965193A CN114965193A CN202110205559.8A CN202110205559A CN114965193A CN 114965193 A CN114965193 A CN 114965193A CN 202110205559 A CN202110205559 A CN 202110205559A CN 114965193 A CN114965193 A CN 114965193A
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- 230000005250 beta ray Effects 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000012806 monitoring device Methods 0.000 title claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 27
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 230000000149 penetrating effect Effects 0.000 claims abstract description 7
- 238000012544 monitoring process Methods 0.000 claims description 23
- 239000008277 atmospheric particulate matter Substances 0.000 claims description 2
- 238000011897 real-time detection Methods 0.000 abstract description 3
- 238000005070 sampling Methods 0.000 description 9
- 239000012528 membrane Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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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
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Measurement Of Radiation (AREA)
Abstract
The invention relates to an atmospheric particulate online monitoring device based on a beta-ray method. The invention relates to an atmospheric particulate online monitoring device based on a beta-ray method, which comprises: the filter paper belt conveying device comprises a shell, a filter paper belt conveying unit, an air inlet unit, a beta ray detection unit, an upper guide rail, a lower guide rail and a driving unit. The upper guide rail and the lower guide rail are arranged in the shell in parallel, the filter paper belt conveying unit is arranged between the upper guide rail and the lower guide rail, and the air inlet unit is arranged above the upper guide rail; the top of the shell is provided with a first air inlet in a penetrating way, and the upper guide rail is provided with a second air inlet in a penetrating way; the air inlet unit comprises a lifting assembly, an air inlet pipeline and a nozzle, and the upper end of the air inlet pipeline penetrates through the corresponding first air inlet hole to be connected with an external air source; the beta ray detection unit comprises a beta ray source and a beta ray detector, wherein the beta ray source is oppositely arranged on the upper guide rail, and the beta ray detector is arranged on the lower guide rail. The atmospheric particulate online monitoring device based on the beta-ray method has the advantages of online real-time detection and high measurement accuracy.
Description
Technical Field
The invention relates to the field of environmental monitoring, in particular to an atmospheric particulate online monitoring device based on a beta-ray method.
Background
The atmospheric environment has a crucial influence on life and health of people, and therefore, the atmospheric environment monitoring method is also particularly important for monitoring particulate matters in the atmospheric environment. Atmospheric particulates are a generic term for solid or liquid particulate matter dispersed in the atmosphere. The atmospheric particulates with the particle size of 0.01 um-100 um are collectively called total suspended particulate TSP. And PM10 and PM2.5 refer to atmospheric particulates having an aerodynamic diameter of less than or equal to 10um and 2.5um, respectively. PM10 is also known as inhalable particles, and the World Health Organization (WHO) is known as particles that can enter the chest; PM2.5 can enter human alveoli and is called accessible lung particulate matter.
Beta-ray absorption, a relatively common method for mass concentration measurement of atmospheric particulates, plays an important role in particulate monitoring in atmospheric environments.
The basic principle of the beta ray absorption method is as follows: along with the increase of the deposition amount of the atmospheric particulates on the filter membrane, the strength of the beta rays penetrating through the filter membrane is exponentially attenuated, and the mass of the atmospheric particulates in a certain sampling volume is calculated according to the change of the strength of the beta rays detected by the detector.
However, the existing atmospheric particulate detection device based on the beta-ray absorption method has the following problems:
1) the detection process comprises two steps of sampling and measuring, wherein the sampling and the measuring are separated, a certain time difference exists, and the detection method cannot be applied to a working scene needing online real-time detection of atmospheric particulates;
2) in the conveying process of the sampling filter membrane, filter membrane shaking is inevitably generated, so that the distribution uniformity of collected particles in the filter membrane is influenced, and the final measurement result is inaccurate.
Disclosure of Invention
Based on this, the invention aims to provide an atmospheric particulate online monitoring device based on a beta-ray method, which has the advantages of real-time monitoring and high measurement accuracy.
The invention provides an atmospheric particulate online detection device based on a beta-ray method, which comprises a shell, and a filter paper belt conveying unit, an air inlet unit, a beta-ray detection unit, an upper guide rail, a lower guide rail and a driving unit which are arranged in the shell;
the upper guide rail and the lower guide rail are arranged in the shell in parallel, the filter paper tape conveying unit is arranged between the upper guide rail and the lower guide rail, and the air inlet unit is arranged above the upper guide rail;
a first air inlet hole is arranged at the top of the shell in a penetrating manner, and a second air inlet hole corresponding to the first air inlet hole is arranged on the upper guide rail in a penetrating manner;
the air inlet unit comprises a lifting assembly, an air inlet pipeline and a nozzle arranged at the lower end of the air inlet pipeline, the upper end of the air inlet pipeline penetrates through the first air inlet hole to be connected with an external air source, and the lifting assembly is used for enabling the lower end of the air inlet pipeline to be located above the upper guide rail or penetrate through the second air inlet hole and drive the nozzle to press a measuring area of the filter paper tape;
the beta ray detection unit comprises a beta ray source and a beta ray detector, wherein the beta ray source is oppositely arranged on the upper guide rail, and the beta ray detector is arranged on the lower guide rail;
the driving unit is used for driving the beta ray source and the beta ray detector to move to the upper end and the lower end of the measuring area on the filter paper belt.
The atmospheric particulate online monitoring device based on the beta-ray method can be directly placed in an atmospheric environment to be detected, the sampling and transportation process of the detected gas is omitted, the problems of inaccurate measurement result and the like caused by the shaking of the filtering membrane in the transmission process are avoided, and the online real-time detection function is realized.
Furthermore, the lifting assembly comprises a positioning plate and a hydraulic rod, the upper end of the hydraulic rod is fixed at the top of the shell, the lower end of the hydraulic rod is fixedly connected with the positioning plate, and the air inlet pipeline penetrates through the positioning plate and is fixedly connected with the positioning plate.
The lifting assembly can enable the gas inlet mechanism to ascend to the upper side of the beta ray source when gas does not need to be collected, the moving path of the beta ray source is not blocked, the beta ray source can be moved to the upper side of a measuring area, and atmospheric particulates in the measuring area are detected.
Further, the driving unit comprises a first driving unit and a second driving unit, the first driving unit is used for driving the beta-ray source to move to the upper end of the measuring area on the filter paper belt, and the second driving unit is used for driving the beta-ray detector to move to the lower end of the measuring area on the filter paper belt.
Further, the first driving unit comprises a first motor and a first screw rod, the first motor is connected with the beta ray source through the first screw rod, and when the first motor drives the first screw rod to rotate, the first screw rod drives the beta ray source to move back and forth along the upper guide rail so as to drive the beta ray source to move back and forth in the horizontal direction.
Further, the second driving unit comprises a second motor and a second lead screw, the second motor is connected with the beta-ray detector through the second lead screw, and when the second motor drives the second lead screw to rotate, the second lead screw drives the beta-ray detector to move back and forth along the upper guide rail so as to drive the beta-ray detector to move back and forth in the horizontal direction.
The device further comprises a monitoring unit, wherein the monitoring unit is used for acquiring the measurement result of the beta-ray detector in the measurement area, calculating according to a preset algorithm and displaying the detection result of the atmospheric particulates.
The monitoring unit can display the content of the particulate matters in the monitored environmental atmosphere in real time, is convenient for monitoring workers to monitor in real time, and makes related work arrangement and adjustment according to the content of the particulate matters in the gas.
Further, the monitoring unit further comprises a reminding device, and when the atmospheric particulate matter detection result is higher than a set value, the reminding device sends out a reminder.
When the content of atmospheric particulate matters in the monitored environment is too high, the reminding device is started, so that monitoring workers can find problems in time and make corrections according to the field environment.
Further, the reminding device is a buzzer or an indicator light.
The reminding device can send out an obvious prompt to remind monitoring staff of paying attention to abnormal conditions.
For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic diagram illustrating relative positions of components in a sampling mode of an online atmospheric particulate monitoring device based on a beta-ray method according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating relative positions of components in a detection mode of an online atmospheric particulate monitoring device based on a beta-ray method according to an embodiment of the present invention;
fig. 3 is a top view of a housing of an online atmospheric particulate monitoring device based on a beta-ray method according to an embodiment of the invention;
fig. 4 is a top view of an upper guide rail of an online atmospheric particulate monitoring device based on a beta-ray method according to an embodiment of the present invention.
In the figure: the device comprises a shell 1, a first air inlet hole 11, a paper filter tape 2, an air inlet unit 3, an air inlet pipeline 31, a nozzle 32, a positioning plate 33, a hydraulic rod 34, a 4-beta ray detection unit 41-beta ray source, a 42-beta ray detector 51, an upper guide rail 52, a lower guide rail and a second air inlet hole 511.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
It will be understood that when an element is referred to as being "secured to" 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.
In the following, several specific embodiments are given for describing the technical solution of the present application in detail. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
To solve the technical problems in the background art, as shown in fig. 1 to 4, fig. 1 is a schematic diagram of relative positions of components in a sampling mode of an online atmospheric particulate monitoring device based on a β -ray method according to an embodiment of the present invention, fig. 2 is a schematic diagram of relative positions of components in a detection mode of an online atmospheric particulate monitoring device based on a β -ray method according to an embodiment of the present invention, fig. 3 is a top view of a housing of an online atmospheric particulate monitoring device based on a β -ray method according to an embodiment of the present invention, fig. 4 is a top view of an upper guide rail of an online atmospheric particulate monitoring device based on a β -ray method according to an embodiment of the present invention, and the present invention provides an online atmospheric particulate monitoring device based on a β -ray method, which includes a housing 1 and a filter paper belt conveying unit 2 disposed in the housing 1, An air inlet unit 3, a beta ray detection unit 4, an upper guide rail 51, a lower guide rail 52 and a driving unit.
An upper rail 51 and a lower rail 52 are provided in parallel in the housing 1, the filter paper tape transfer unit 2 is provided between the upper rail 51 and the lower rail 52, and the air intake unit is provided above the upper rail 51.
The top of the housing 1 is provided with a first air inlet 11, and the upper guide rail 51 is provided with a second air inlet 511 corresponding to the first air inlet 11.
The air inlet unit 3 comprises a lifting assembly, an air inlet pipe 31 and a nozzle 32 arranged at the lower end of the air inlet pipe, the upper end of the air inlet pipe 31 penetrates through the first air inlet hole 11 to be connected with an external air source, and the lifting assembly is used for enabling the lower end of the air inlet pipe 31 to be located above the upper guide rail 51 or penetrate through the second air inlet hole 511 and driving the nozzle 32 to press the measuring area of the filter paper tape 2.
The beta-ray detection unit 4 includes a beta-ray source 41 provided to the upper rail 51 and a beta-ray detector 42 provided to the lower rail 52.
A driving unit (not shown) is used for driving the beta-ray source 41 and the beta-ray detector 42 to move to the upper and lower ends of the measurement area on the filter paper tape 2.
In a preferred embodiment, the lifting assembly comprises a positioning plate 33 and a hydraulic rod 34, wherein the upper end of the hydraulic rod 34 is fixed on the top of the housing 1, the lower end of the hydraulic rod 34 is fixedly connected with the positioning plate 33, and the air inlet pipe 31 passes through the positioning plate 33 and is fixedly connected with the positioning plate 33.
In another preferred embodiment, the driving unit comprises a first driving unit for driving the beta-ray source 41 to move to the upper end of the measuring area on the filter paper strip 2 and a second driving unit for moving the beta-ray detector 42 to the lower end of the measuring area on the filter paper strip 2.
The first driving unit may specifically include a first motor and a first lead screw, the first motor is connected to the β -ray source 41 through the first lead screw, and when the first motor drives the first lead screw to rotate, the first lead screw drives the β -ray source 41 to move back and forth along the upper guide rail 51, so as to drive the β -ray source 41 to reciprocate in the horizontal direction.
The second driving unit may specifically include a second motor and a second lead screw, the second motor is connected to the β -ray detector 42 through the second lead screw, and when the second motor drives the second lead screw to rotate, the second lead screw drives the β -ray detector 42 to move back and forth along the lower guide rail 52, so as to drive the β -ray detector 42 to reciprocate in the horizontal direction.
In a specific embodiment, the atmospheric particulate online monitoring device based on the beta-ray method provided by the invention can be divided into a sampling mode and a detection mode, and the detection process is as follows:
1) sampling mode:
the first motor drives the first screw rod to rotate, and further drives the beta-ray source 41 to horizontally move to one end far away from the measurement area along the upper guide rail 51; the second motor drives the second screw rod to rotate, and further drives the beta-ray detector 42 to horizontally move to one end far away from the measurement area along the lower guide rail 52;
the hydraulic rod 34 controls the positioning plate 33 to descend, the air inlet pipe 31 is driven to descend to a certain position through the upper guide rail 51, the filter paper tape 2 is pressed by the nozzle 32, and the air flow penetrates through the filter paper tape 2 and forms a measuring area on the filter paper tape 2.
2) Detection mode: the hydraulic rod 34 controls the positioning plate 33 to ascend, and drives the air inlet pipeline 31 to ascend above the upper guide rail 51;
the first motor drives the first screw rod to rotate, and further drives the beta-ray source 41 to horizontally move to a position right above the measurement area along the upper guide rail 51; the second motor drives the second screw rod to rotate, and further drives the beta-ray detector 42 to horizontally move to a position right below the measurement area along the lower guide rail 52;
the β -ray source 41 irradiates the measurement region sufficiently, and the β -ray detector 42 detects the β -ray transmitted through the measurement region.
In order to facilitate monitoring workers to check the content of the atmospheric particulates in the monitored environment in real time, in a preferred embodiment, the atmospheric particulates online monitoring device based on the beta-ray method further includes a monitoring unit, and the monitoring unit is configured to obtain a measurement result of the beta-ray detector 42 in a measurement area, calculate the measurement result according to a preset algorithm, and display an atmospheric particulates detection result. In a specific embodiment, the monitoring unit is a computer carrying a computing program and a display screen.
In practical application, if the content of atmospheric particulates in the monitored environment is higher than a certain specific value, monitoring workers generally need to be reminded immediately so that the workers can find abnormality as soon as possible, and then the field condition is adjusted according to the content of the atmospheric particulates. In view of the above technical problem, in another embodiment, the monitoring unit further includes a reminding device. And when the detection result of the atmospheric particulates in the detected environment is higher than a set value, the reminding device sends out a reminder. In a preferred embodiment, the reminding device is a buzzer or an indicator light. Through setting up obvious sound suggestion or flashing suggestion, guarantee that monitoring personnel also can in time discover abnormal conditions even if not when monitoring unit is other.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (8)
1. The utility model provides an atmospheric particulates on-line monitoring device based on beta ray method which characterized in that:
the device comprises a shell, and a filter paper belt conveying unit, an air inlet unit, a beta-ray detection unit, an upper guide rail, a lower guide rail and a driving unit which are arranged in the shell;
the upper guide rail and the lower guide rail are arranged in the shell in parallel, the filter paper tape conveying unit is arranged between the upper guide rail and the lower guide rail, and the air inlet unit is arranged above the upper guide rail;
a first air inlet hole is arranged at the top of the shell in a penetrating manner, and a second air inlet hole corresponding to the first air inlet hole is arranged in the upper guide rail in a penetrating manner;
the air inlet unit comprises a lifting assembly, an air inlet pipeline and a nozzle arranged at the lower end of the air inlet pipeline, the upper end of the air inlet pipeline penetrates through the first air inlet hole to be connected with an external air source, and the lifting assembly is used for enabling the lower end of the air inlet pipeline to be located above the upper guide rail or penetrate through the second air inlet hole and drive the nozzle to press a measuring area of the filter paper tape;
the beta ray detection unit comprises a beta ray source and a beta ray detector, wherein the beta ray source is oppositely arranged on the upper guide rail, and the beta ray detector is arranged on the lower guide rail;
the driving unit is used for driving the beta ray source and the beta ray detector to move to the upper end and the lower end of the measuring area on the filter paper belt.
2. The atmospheric particulate on-line monitoring device based on the beta-ray method according to claim 1, characterized in that:
the lifting assembly comprises a positioning plate and a hydraulic rod, the upper end of the hydraulic rod is fixed at the top of the shell, the lower end of the hydraulic rod is fixedly connected with the positioning plate, and the air inlet pipeline penetrates through the positioning plate and is fixedly connected with the positioning plate.
3. The atmospheric particulate on-line monitoring device based on the beta-ray method according to claim 1, characterized in that:
the driving unit comprises a first driving unit and a second driving unit, the first driving unit is used for driving the beta-ray source to move to the upper end of the measuring area on the filter paper belt, and the second driving unit is used for driving the beta-ray detector to move to the lower end of the measuring area on the filter paper belt.
4. The atmospheric particulate detection device based on beta ray method of claim 3, characterized in that:
the first driving unit comprises a first motor and a first screw rod, the first motor is connected with the beta ray source through the first screw rod, and when the first motor drives the first screw rod to rotate, the first screw rod drives the beta ray source to move back and forth along the upper guide rail so as to drive the beta ray source to reciprocate in the horizontal direction.
5. The atmospheric particulate detection device based on the beta-ray method according to claim 3, characterized in that:
the second driving unit comprises a second motor and a second screw rod, the second motor is connected with the beta-ray detector through the second screw rod, and when the second motor drives the second screw rod to rotate, the second screw rod drives the beta-ray detector to move back and forth along the upper guide rail so as to drive the beta-ray detector to reciprocate in the horizontal direction.
6. The atmospheric particulate detection device based on the beta-ray method according to claim 1, characterized in that:
the device further comprises a monitoring unit, wherein the monitoring unit is used for acquiring the measurement result of the beta-ray detector in the measurement area and displaying the detection result of the atmospheric particulates.
7. The atmospheric particulate on-line monitoring device based on the beta-ray method according to claim 6, characterized in that:
the monitoring unit further comprises a reminding device, and when the atmospheric particulate matter detection result is higher than a set value, the reminding device sends out a reminder.
8. The atmospheric particulate on-line monitoring device based on the beta-ray method according to claim 7, characterized in that:
the reminding device is a buzzer or an indicator light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110205559.8A CN114965193A (en) | 2021-02-24 | 2021-02-24 | Atmospheric particulate on-line monitoring device based on beta-ray method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110205559.8A CN114965193A (en) | 2021-02-24 | 2021-02-24 | Atmospheric particulate on-line monitoring device based on beta-ray method |
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| Publication Number | Publication Date |
|---|---|
| CN114965193A true CN114965193A (en) | 2022-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110205559.8A Pending CN114965193A (en) | 2021-02-24 | 2021-02-24 | Atmospheric particulate on-line monitoring device based on beta-ray method |
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| Country | Link |
|---|---|
| CN (1) | CN114965193A (en) |
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2021
- 2021-02-24 CN CN202110205559.8A patent/CN114965193A/en active Pending
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Application publication date: 20220830 |