CN113252525A - Particulate matter on-line monitoring system based on beta ray and light scattering method - Google Patents
Particulate matter on-line monitoring system based on beta ray and light scattering method Download PDFInfo
- Publication number
- CN113252525A CN113252525A CN202110467222.4A CN202110467222A CN113252525A CN 113252525 A CN113252525 A CN 113252525A CN 202110467222 A CN202110467222 A CN 202110467222A CN 113252525 A CN113252525 A CN 113252525A
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- light scattering
- beta
- paper tape
- particulate matter
- scattering method
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- 238000000149 argon plasma sintering Methods 0.000 title claims abstract description 29
- 238000012544 monitoring process Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000005250 beta ray Effects 0.000 title claims abstract description 23
- 239000013618 particulate matter Substances 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 239000003365 glass fiber Substances 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims description 17
- 230000005855 radiation Effects 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 6
- QWUZMTJBRUASOW-UHFFFAOYSA-N cadmium tellanylidenezinc Chemical group [Zn].[Cd].[Te] QWUZMTJBRUASOW-UHFFFAOYSA-N 0.000 claims description 5
- 239000013078 crystal Substances 0.000 claims description 4
- 239000003570 air Substances 0.000 abstract description 21
- 230000002285 radioactive effect Effects 0.000 abstract description 11
- 239000012080 ambient air Substances 0.000 abstract description 7
- 230000007547 defect Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
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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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- G01N15/075—
Abstract
The invention discloses a particulate matter on-line monitoring system based on beta rays and a light scattering method, which comprises the following steps: the device comprises an air pump, a heater connected to the rear end of the air pump, a sealed darkroom arranged at the rear end of the heater, a paper tape transmission system arranged in the sealed darkroom, a glass fiber paper tape arranged on the paper tape transmission system, a beta radioactive source arranged in the sealed darkroom and positioned on one side of the paper tape transmission system, a beta ray sensor arranged in the sealed darkroom and positioned on one side of the paper tape transmission system and corresponding to the beta radioactive source, a light scattering detection device arranged at the rear end of the sealed darkroom and a main control system, wherein the main control system is connected with a display. According to the invention, the condition of the particulate matter in the detected ambient air is calculated by combining beta rays and a light scattering method, the real-time monitoring precision is improved, various parameters of the particulate matter are obtained, the monitoring result is displayed on the display in real time, and an operator can intuitively obtain the condition of the concentration of the particulate matter in the detected ambient air.
Description
Technical Field
The invention relates to the technical field of particle monitoring, in particular to a particle online monitoring system based on beta rays and a light scattering method.
Background
The current commercial particulate monitoring method is mainly a filter membrane weighing method or a light scattering method. The filter membrane weighing method is simple in principle and reliable in test data, and can directly measure the mass concentration of inhalable particles. However, in the measuring process, the method has the defects of complex operation, time consumption, more used equipment and the like, and cannot realize on-line continuous monitoring. The light scattering method can realize on-line real-time monitoring, but the signals detected by the technology only contain particle number and particle size information, but not contain the quality information of particulate matters, and the measurement accuracy of light scattering is low.
Accordingly, the prior art is deficient and needs improvement.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an online particulate matter monitoring system based on beta rays and a light scattering method.
The technical scheme of the invention is as follows: provided is an online particulate matter monitoring system based on beta rays and a light scattering method, which comprises: the device comprises an air pump, a heater connected to the rear end of the air pump, a sealed darkroom arranged at the rear end of the heater, a paper tape transmission system arranged in the sealed darkroom, a glass fiber paper tape arranged on the paper tape transmission system, a beta radioactive source arranged in the sealed darkroom and positioned on one side of the paper tape transmission system, a beta ray sensor arranged in the sealed darkroom and positioned on the other side of the paper tape transmission system and corresponding to the beta radioactive source, a light scattering detection device arranged at the rear end of the sealed darkroom, and a main control system, wherein the main control system is connected with the air pump, the heater, the beta radioactive source, the beta ray sensor and the light scattering detection device, and is connected with a display.
Further, the tape drive system comprises: the stock form device, set up in displacement sensor and photoelectric switch of stock form device side, the glass fiber paper tape sets up on the stock form device.
Further, the beta radioactive source is a C-14 radioactive source.
Furthermore, a detection module adopted by the beta-ray sensor is a cadmium zinc telluride crystal.
Further, a temperature and humidity detection module is arranged beside the heater and connected with a main control system.
Furthermore, the rear end of the heater is connected with a measuring air chamber, and the rear end of the measuring air chamber is connected with a flow controller.
Further, the master control system is connected with a meteorological module, an outdoor LED illuminating lamp and a camera.
Further, a PM2.5 cutter is arranged at the front end of the air suction pump.
By adopting the scheme, the condition of the particulate matters in the detected ambient air is calculated by combining the beta rays and the light scattering method, the real-time monitoring precision is improved, various parameters of the particulate matters are obtained, the monitoring result is displayed on the display in real time, and the operator can intuitively obtain the condition of the concentration of the particulate matters in the detected ambient air.
Drawings
FIG. 1 is a block diagram of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
Referring to fig. 1, the present invention provides an online particle monitoring system based on β -ray and light scattering method, including: the device comprises an air pump, a heater connected to the rear end of the air pump, a sealed darkroom arranged at the rear end of the heater, a paper tape transmission system arranged in the sealed darkroom, a glass fiber paper tape arranged on the paper tape transmission system, a beta radiation source arranged in the sealed darkroom and positioned at one side of the paper tape transmission system, a beta ray sensor arranged in the sealed darkroom corresponding to the beta radiation source and positioned at the other side of the paper tape transmission system, a light scattering detection device arranged at the rear end of the sealed darkroom, and a main control system. The main control system is connected with the air pump, the heater, the beta radioactive source, the beta ray sensor and the light scattering detection device, and is connected with the display. The air suction pump sucks the particles from the air into the air path, and the particles pass through the heater, so that moisture mixed in the particles is removed. The particles enter a sealed dark room under the blowing of the air path and are enriched on the glass fiber paper tape. Beta rays emitted by the beta radiation source penetrate through the glass fiber paper tape enriched with the particles, so that the intensity of the beta rays is attenuated to a certain extent, the intensity of the beta rays is detected through the beta ray sensor in a manner that the amount of the particles is in direct proportion to the attenuation degree of the intensity of the beta rays, and the concentration of the particles in each cubic meter in the tested atmospheric sample is calculated by combining data detected by the light scattering detection device. When the detection is carried out, the display synchronously displays the detection reading and the calculation result, so that an operator can intuitively obtain the condition of detecting the concentration of the particulate matters in the ambient air, and the online continuous monitoring is realized. The paper tape transmission system winds the glass fiber paper tape at intervals, and the glass fiber paper tape which is not enriched with the particulate matters is exposed, so that repeated sampling detection is facilitated, and authenticity and reliability of detection data are guaranteed.
The tape drive system comprises: the stock form device, set up in displacement sensor and photoelectric switch of stock form device side, the glass fiber paper tape sets up on the stock form device. The displacement distance of the movement of the glass fiber paper tape rolled by the paper rolling device is detected through the displacement sensor, and whether the sealed darkroom is in a closed state or not is detected through the photoelectric switch, so that the accuracy and the stability of the displacement of the glass fiber paper tape are ensured, the failure rate is reduced, and the accuracy of detection data is ensured.
The beta radioactive source is a C-14 radioactive source. The C-14 radioactive source can generate beta rays stably, has long half-life period and low price, is suitable for long-time large-batch detection, and meets the requirement of actual detection.
The detection module adopted by the beta-ray sensor is a cadmium zinc telluride (CdZnTe) crystal. The beta-ray sensor adopting the cadmium zinc telluride crystal as the detection module has high detection efficiency, high accuracy and lower cost, and meets the requirement of actual detection.
The temperature and humidity detection module is arranged beside the heater and connected with the main control system. The temperature and humidity conditions in the air path are detected through the temperature and humidity detection module, and the real-time temperature and humidity are fed back to the master control system, so that the working state of the heater is controlled, and the humidity of the gas to be detected sucked by the air suction pump can be ensured to be within a set range.
The rear end of the heater is connected with a measuring air chamber, and the rear end of the measuring air chamber is connected with a flow controller. The gas flow controller is used for keeping the flow of the gas input into the sealed darkroom at a set constant value, thereby ensuring the accuracy of the detection and calculation data.
The main control system is connected with a meteorological module, an outdoor LED illuminating lamp and a camera so as to obtain the weather condition of the external environment and send the weather condition to the main control system, and therefore the particulate matter concentration conditions under different weather conditions can be calculated, and the monitoring data are more accurate. When detecting weather conditions, shoot external environment's real-time video through the camera to compare with meteorological module's data collection, thereby improve meteorological information data acquisition's accuracy. The outdoor LED illuminating lamps are used for arranging the tubes, so that the video recording quality of the camera at night or under the poor illumination condition is ensured.
And a PM2.5 cutter is arranged at the front end of the air pump. Particulate matter sampling is carried out through a PM2.5 cutter, so that TSP, PM10, PM5 and PM2.5 (total suspended particulate matter, inhalable particulate matter and fine particulate matter) in the air are sampled, and the multifunctional function of one machine is realized.
In conclusion, the invention calculates the condition of the particles in the detected ambient air by combining the beta ray and the light scattering method, improves the real-time monitoring precision, obtains various parameters of the particles, and displays the monitoring result on the display in real time, so that an operator can intuitively obtain the condition of the concentration of the particles in the detected ambient air.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An on-line particulate matter monitoring system based on beta rays and a light scattering method is characterized by comprising the following components: the device comprises an air pump, a heater connected to the rear end of the air pump, a sealed darkroom arranged at the rear end of the heater, a paper tape transmission system arranged in the sealed darkroom, a glass fiber paper tape arranged on the paper tape transmission system, a beta radiation source arranged in the sealed darkroom and positioned on one side of the paper tape transmission system, a beta ray sensor arranged in the sealed darkroom and positioned on the other side of the paper tape transmission system, a light scattering detection device arranged at the rear end of the sealed darkroom, and a main control system, wherein the main control system is connected with the air pump, the heater, the beta radiation source, the beta ray sensor and the light scattering detection device, and is connected with a display.
2. The beta ray and light scattering method based on-line particulate matter monitoring system of claim 1, wherein the paper tape transmission system comprises: the stock form device, set up in displacement sensor and photoelectric switch of stock form device side, the glass fiber paper tape sets up on the stock form device.
3. The system for on-line monitoring of particulate matter based on beta ray and light scattering method of claim 1, wherein the beta radiation source is C-14 radiation source.
4. The system for on-line monitoring of particulate matter based on beta ray and light scattering method as claimed in claim 1, wherein the detection module adopted by the beta ray sensor is cadmium zinc telluride crystal.
5. The beta ray and light scattering method based on-line particulate matter monitoring system of claim 1, wherein a temperature and humidity detection module is arranged beside the heater, and the temperature and humidity detection module is connected with a main control system.
6. The system for on-line monitoring of particulate matter based on beta ray and light scattering method of claim 1, wherein the back end of the heater is connected with a measuring gas chamber, and the back end of the measuring gas chamber is connected with a flow controller.
7. The system for monitoring the particles on line based on the beta ray and the light scattering method as claimed in claim 1, wherein the main control system is connected with a meteorological module, an outdoor LED illuminating lamp and a camera.
8. The on-line particulate matter monitoring system based on the beta ray and light scattering method according to claim 1, wherein a PM2.5 cutter is arranged at the front end of the air suction pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110467222.4A CN113252525A (en) | 2021-04-28 | 2021-04-28 | Particulate matter on-line monitoring system based on beta ray and light scattering method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110467222.4A CN113252525A (en) | 2021-04-28 | 2021-04-28 | Particulate matter on-line monitoring system based on beta ray and light scattering method |
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| CN113252525A true CN113252525A (en) | 2021-08-13 |
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| CN202110467222.4A Pending CN113252525A (en) | 2021-04-28 | 2021-04-28 | Particulate matter on-line monitoring system based on beta ray and light scattering method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114486958A (en) * | 2022-01-11 | 2022-05-13 | 甘肃旭盛显示科技有限公司 | Glass partition paper impurity concentration detection device and detection method |
| CN114739586A (en) * | 2022-04-19 | 2022-07-12 | 吉林大学 | Leakage detection equipment for radioactive substance cleaning box |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203949849U (en) * | 2014-07-21 | 2014-11-19 | 青岛众瑞智能仪器有限公司 | A kind of pick-up unit of measuring particle quality concentration |
| CN105334147A (en) * | 2015-12-04 | 2016-02-17 | 深圳睿境环保科技有限公司 | Online particle monitoring system and method based on beta ray method and light scattering method |
| CN111077049A (en) * | 2019-12-27 | 2020-04-28 | 安徽安光环境科技有限公司 | Portable β ray method particulate matter concentration monitoring system |
-
2021
- 2021-04-28 CN CN202110467222.4A patent/CN113252525A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203949849U (en) * | 2014-07-21 | 2014-11-19 | 青岛众瑞智能仪器有限公司 | A kind of pick-up unit of measuring particle quality concentration |
| CN105334147A (en) * | 2015-12-04 | 2016-02-17 | 深圳睿境环保科技有限公司 | Online particle monitoring system and method based on beta ray method and light scattering method |
| CN111077049A (en) * | 2019-12-27 | 2020-04-28 | 安徽安光环境科技有限公司 | Portable β ray method particulate matter concentration monitoring system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114486958A (en) * | 2022-01-11 | 2022-05-13 | 甘肃旭盛显示科技有限公司 | Glass partition paper impurity concentration detection device and detection method |
| CN114739586A (en) * | 2022-04-19 | 2022-07-12 | 吉林大学 | Leakage detection equipment for radioactive substance cleaning box |
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Application publication date: 20210813 |