CN112816375A - Aerosol monitoring device - Google Patents
Aerosol monitoring device Download PDFInfo
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- CN112816375A CN112816375A CN202011591131.3A CN202011591131A CN112816375A CN 112816375 A CN112816375 A CN 112816375A CN 202011591131 A CN202011591131 A CN 202011591131A CN 112816375 A CN112816375 A CN 112816375A
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- 239000000443 aerosol Substances 0.000 title claims abstract description 112
- 238000012806 monitoring device Methods 0.000 title claims abstract description 58
- 238000005070 sampling Methods 0.000 claims abstract description 97
- 238000005259 measurement Methods 0.000 claims abstract description 63
- 238000001514 detection method Methods 0.000 claims abstract description 55
- 230000000737 periodic effect Effects 0.000 claims abstract description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 22
- 229910052710 silicon Inorganic materials 0.000 claims description 22
- 239000010703 silicon Substances 0.000 claims description 22
- 238000001914 filtration Methods 0.000 claims description 20
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 239000000941 radioactive substance Substances 0.000 claims description 6
- 238000002161 passivation Methods 0.000 claims description 5
- 239000000523 sample Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 238000011897 real-time detection Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002285 radioactive effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005036 potential barrier Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004347 surface barrier 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
- G01N15/0606—Investigating concentration of particle suspensions by collecting particles on a support
Abstract
The invention relates to an aerosol monitoring device, which comprises a supporting body, and a closed sampling chamber and a vacuum pump which are arranged on the supporting body, wherein an aerosol sampling detection device is arranged in the closed sampling chamber and is used for sampling and detecting the content of aerosol in airflow flowing in through an air inlet of the closed sampling chamber; the interior of the vacuum pump is communicated with the interior of the closed sampling chamber and is used for providing a closed vacuum environment for the closed sampling chamber; the air inlet passage of the closed sampling chamber is provided with an electromagnetic valve, and the measurement mode of the aerosol monitoring device is controlled by controlling the opening and closing and/or the working cycle of the electromagnetic valve, wherein the measurement mode comprises at least one of a continuous measurement mode, a periodic measurement mode and a continuous/periodic combined measurement mode. The application provides an aerosol monitoring devices can provide multiple measuring mode and measurement accuracy height.
Description
Technical Field
The invention relates to the technical field of detection, in particular to an aerosol monitoring device.
Background
Aerosol particles affect weather, climate, ground-atmosphere heat balance, etc., by direct and indirect radiation effects, and also reduce visibility and affect human health. If the content of aerosol in the air can be accurately measured, the method can produce beneficial effects on weather forecast, climate simulation prediction, environmental monitoring, remote sensing application and the like.
However, the traditional aerosol monitoring device has a single measurement mode and low measurement accuracy, and is difficult to meet the customer requirements of various application scenarios.
Disclosure of Invention
In view of the above, it is necessary to provide an aerosol monitoring device with high measurement accuracy, which can provide multiple measurement modes, in order to solve the technical problems of single measurement mode and low measurement accuracy of the aerosol monitoring device in the background art.
In order to achieve the above and other objects, the present application provides an aerosol monitoring device, including a supporting body, and a sealed sampling chamber and a vacuum pump both disposed on the supporting body, wherein an aerosol sampling and detecting device is disposed inside the sealed sampling chamber and is used for sampling and detecting the content of aerosol in an air flow flowing in through an air inlet of the sealed sampling chamber; the interior of the vacuum pump is communicated with the interior of the closed sampling chamber and is used for providing a closed vacuum environment for the closed sampling chamber; the air inlet passage of the closed sampling chamber is provided with an electromagnetic valve, and the measurement mode of the aerosol monitoring device is controlled by controlling the opening and closing and/or the working cycle of the electromagnetic valve, wherein the measurement mode comprises at least one of a continuous measurement mode, a periodic measurement mode and a continuous/periodic combined measurement mode.
The aerosol monitoring device provides a sealed vacuum environment for the sealed sampling chamber by arranging the sealed sampling chamber and the vacuum pump communicated with the interior of the sealed sampling chamber; an aerosol sampling detection device is arranged in the closed sampling chamber to sample and detect the content of the aerosol in the airflow flowing in through the air inlet of the closed sampling chamber; the measurement mode of the aerosol monitoring device is controlled by controlling the opening and closing and/or the working period of an electromagnetic valve arranged in an air inlet passage of the closed sampling chamber, so that the aerosol monitoring device provides one or more of a continuous measurement mode, a periodic measurement mode and a continuous/periodic combined measurement mode, and a user can conveniently adopt a proper measurement mode according to the measurement requirements of different application scenes; because the aerosol sampling detection device of this application is worked in airtight vacuum environment, can be to the via the accurate measurement of the content of the aerosol in the air current of the air inlet inflow of airtight sampling chamber.
In one embodiment, the aerosol sampling detection device comprises a sampling device and a detection device, wherein the sampling device is used for collecting aerosol in airflow flowing in through an air inlet of the closed sampling chamber; the detection device with the sampling device interval sets up, detection device's detection surface is in the orthographic projection of sampling device's sampling surface is located the middle part of sampling surface, detection device is used for surveying the content of the aerosol that the sampling device gathered.
In one embodiment, the sampling device comprises a filter paper and a driving device, wherein the extension direction of the filter paper is perpendicular to the air inlet direction of the air inlet of the closed sampling chamber, and the filter paper is used for filtering and accumulating aerosol in the airflow flowing through the surface of the filter paper; the driving device is connected with the filter paper and used for driving the filter paper to move so as to replace the filter paper filtering surface used for filtering and accumulating the aerosol.
In one embodiment, the detection device comprises a passivated injection plane silicon detector, the detection surface of the passivated injection plane silicon detector is arranged in parallel and at a distance from the filter surface of the filter paper, and the orthographic projection of the detection surface on the filter surface is positioned in the middle of the filter surface, so as to avoid interference between the filter surface of the filter paper and the detection surface of the detector during replacement of the filter surface of the filter paper for filtering and accumulating aerosol; in addition, the aerosol on the filtering surface of the filter paper is prevented from polluting the detection surface of the detector, and the detection effect and the service life of the detector are prevented from being influenced.
In one embodiment, the detection surface of the passivated injection flat silicon detector is spaced from the filter paper filtering surface by a distance of 1mm to 10 mm.
In one embodiment, the detection device comprises a preamplifier and a multichannel analyzer, wherein the preamplifier is connected with the passivated injection planar silicon detector and is used for amplifying a detection signal provided by the passivated injection planar silicon detector to generate an amplified detection signal; and the multichannel analyzer is connected with the preamplifier and used for receiving the amplified detection signal and generating a pulse signal for feeding back the content of the radioactive substances in the aerosol according to the amplified detection signal.
In one embodiment, the aerosol monitoring device further comprises a controller, wherein the controller is connected with the solenoid valve and the multichannel analyzer, and is used for controlling the opening and closing and/or the working cycle of the solenoid valve to control the measurement mode of the aerosol monitoring device and the flow rate of the airflow flowing in through the air inlet of the closed sampling chamber; the controller is also used for receiving the pulse signal and judging the content of the radioactive substances in the aerosol according to the pulse signal.
In one embodiment, the aerosol monitoring device further comprises a touch display screen, the touch display screen is connected with the controller and arranged at the top of the support body, and an included angle between the extending direction of the touch display screen and the height direction of the support body is smaller than 90 degrees; the touch display screen is used for displaying the measurement result and/or the measurement parameter; the touch display screen is also used for inputting control signals and/or configuration parameters for a client to check and operate, and bending down or squatting down is avoided.
In one embodiment, the aerosol monitoring device further comprises a flow meter disposed in the gas flow path between the closed sampling chamber and the vacuum pump for detecting the gas flow in the gas flow path.
In one embodiment, the aerosol monitoring device further comprises a storage box, wherein the storage box is connected with the support body through a sliding rail, the storage box is configured to comprise a first state located inside the support body, a second state sliding through the sliding rail and a third state partially sliding out of the support body, and when accessory articles placed in the storage box are prevented from being damaged by dust or rainwater, the accessory articles are convenient for a user to place and obtain.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments are briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain drawings of other embodiments based on these drawings without creative efforts.
Fig. 1 is a schematic cross-sectional view of an aerosol monitoring device according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a sampling device of an aerosol monitoring device provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a detection device of an aerosol monitoring device provided in an embodiment of the present application;
fig. 4 is a schematic diagram illustrating an architecture of a detection device of an aerosol monitoring device according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of an aerosol monitoring device according to an embodiment of the present application;
fig. 6a is a schematic diagram of an aerosol monitoring device according to another embodiment of the present application;
figure 6b is a schematic cross-sectional view of an aerosol monitoring device according to another embodiment of the present disclosure;
fig. 7 is a schematic cross-sectional view of an aerosol monitoring device according to yet another embodiment of the present disclosure;
fig. 8a is a schematic view of an application scenario of an aerosol monitoring device provided in an embodiment of the present application;
fig. 8b is a schematic view of an application scenario of an aerosol monitoring device provided in another embodiment of the present application.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Where the terms "comprising," "having," and "including" are used herein, another element may be added unless an explicit limitation is used, such as "only," "consisting of … …," etc. Unless mentioned to the contrary, terms in the singular may include the plural and are not to be construed as being one in number.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It should be noted that "up", "left", "right" and "middle" as referred to in this application all refer to directions towards the user.
Referring to fig. 1, in an embodiment of the present application, an aerosol monitoring device 100 is provided, which includes a supporting body 101, a sealed sampling chamber 10 disposed in the supporting body 101, and a vacuum pump 20, wherein an aerosol sampling detection device 40 is disposed inside the sealed sampling chamber 101, and the sampling detection device 40 is configured to sample and detect the content of aerosol in an airflow flowing in through an air inlet of the sealed sampling chamber 10; the interior of the vacuum pump 20 is communicated with the interior of the closed sampling chamber 10 and is used for providing a closed vacuum environment for the closed sampling chamber 10; wherein, the electromagnetic valve 30 is arranged in the air inlet passage of the closed sampling chamber 10, and the measurement mode of the aerosol monitoring device 100 is controlled by controlling the opening and closing and/or the work cycle of the electromagnetic valve 30, and the measurement mode includes at least one of a continuous measurement mode, a periodic measurement mode and a continuous/periodic combined measurement mode.
By way of example, with continued reference to fig. 1, a sealed vacuum environment is provided for sealed sampling chamber 10 by providing sealed sampling chamber 10 and vacuum pump 20 in communication with the interior of sealed sampling chamber 10; an aerosol sampling detection device 40 is arranged in the closed sampling chamber 10 to sample and detect the content of the aerosol in the airflow flowing in through the air inlet of the closed sampling chamber 10; the measurement mode of the aerosol monitoring device 100 is controlled by controlling the opening and closing and/or the working cycle of the electromagnetic valve 30 arranged in the air inlet passage of the closed sampling chamber 10, so that the aerosol monitoring device 100 provides one or more of a continuous measurement mode, a periodic measurement mode and a continuous/periodic combined measurement mode, and a user can conveniently adopt a proper measurement mode according to the measurement requirements of different application scenes; since the aerosol sampling and detecting device 100 of the present application operates in a sealed vacuum environment, the content of aerosol in the air flow flowing in through the air inlet of the sealed sampling chamber 10 can be accurately measured. When the solenoid valve 30 is opened, the air flows continuously, creating a condition for continuous measurement. When the electromagnetic valve 30 is closed, the sealed sampling chamber forms vacuum under the condition that the vacuum pump still exhausts air, so that the conditions of vacuum measurement and periodic measurement are provided.
Further, with continuing reference to fig. 1, in one embodiment of the present application, the aerosol sampling and detecting device 40 includes a sampling device 41 and a detecting device 42, the sampling device 41 is used for collecting aerosol in the airflow flowing in through the air inlet of the sealed sampling chamber 10; the detection device 42 is arranged at a distance from the sampling device 41, the orthographic projection of the detection surface of the detection device 42 on the sampling surface of the sampling device 41 is located in the middle of the sampling surface of the sampling device 41, and the detection device 42 is used for detecting the content of the aerosol collected by the sampling device 41.
Specifically, referring to fig. 2, in an embodiment of the present application, the sampling device 41 includes a filter paper 411 and a driving device 412, the filter paper 411 extends in a direction perpendicular to an air inlet direction of the air inlet of the sealed sampling chamber 10, and the filter paper 411 is used for filtering and accumulating aerosol in an air flow passing through the surface of the filter paper 411; the driving means 412 is connected to the filter paper 411 for moving the filter paper 411 to replace the filter surface of the filter paper for filtering and accumulating the aerosol. The aerosol in the air enters the closed sampling chamber 10 along with the airflow, the aerosol with larger particles is accumulated on the filter paper 411 when passing through the filter paper 411, and the detection device 42 in the closed sampling chamber 10 can measure the accumulated aerosol on the filter paper, so that the activity concentration of the radioactive aerosol in the air is obtained.
By way of example, with continuing reference to fig. 2, in one embodiment of the present application, the driving device 412 includes a driving wheel 4121 and a driven wheel 4122, the driving wheel 4121 and the driven wheel 4122 are located on both sides of the filter paper filtering surface for filtering and accumulating the aerosol, and the filter paper filtering surface for filtering and accumulating the aerosol can be replaced by controlling the servo motor to operate and driving the driven wheel 4122 to move the filter paper 411.
Further, referring to fig. 3, in an embodiment of the present application, the detecting device 42 includes a passivated injected planar silicon detector 421, a detecting surface 421a of the passivated injected planar silicon detector 421 is disposed parallel to and spaced apart from the filtering surface 411a of the filter paper 411, and an orthogonal projection of the detecting surface 421a of the passivated injected planar silicon detector 421 on the filtering surface 411a of the filter paper 411 is located in a middle of the filtering surface 411a of the filter paper 411.
Specifically, in one embodiment of the present application, the structural edges of the passivated implanted planar silicon detector 421 are embedded inside, no epoxy edge-sealing agent is needed, the internal connection contacts are formed by ion implantation, and the detection sensitivity of the passivated implanted planar silicon detector 421 is improved by controlling the resistivity of the ion implanted contacts. Compared with a silicon surface barrier detector and a diffusion junction detector, the passivation injection plane silicon detector 421 in the present application at least has the following advantages:
1) the entrance window is firm and durable, and can be conveniently cleaned and wiped;
2) the leakage current is 1/8-1/100 of silicon surface potential barrier detector and diffusion junction detector;
3) the thickness of the entrance window is smaller than that of the entrance window of the corresponding silicon surface potential barrier detector or that of the diffusion junction type detector.
Because this application has adopted passivation to pour into planar silicon detector 421 and has surveyed the content of the radioactive aerosol in the air to be detected, consequently, detection device 42 in this application has above-mentioned advantage at least to the detection efficiency and the measurement accuracy of the aerosol monitoring devices that this application provided have been improved.
Preferably, in an embodiment of the present application, with continued reference to fig. 3, the detection surface of the passivated implanted planar silicon detector 421 is spaced from the filter surface of the filter paper 411 by a distance d of 1mm to 10mm, so as to avoid interference between the filter surface 411a of the filter paper 411 and the detection surface 421a of the detector 421 during replacement of the filter surface of the filter paper for filtering and accumulating aerosol; in addition, the aerosol on the filtering surface 411a of the filter paper 411 is prevented from polluting the detecting surface 421a of the detector 421, and the detecting effect and the service life of the detector 421 are prevented from being influenced.
Further, referring to fig. 4, in an embodiment of the present application, the detecting device 42 further includes a preamplifier 422 and a multichannel analyzer 423, the preamplifier 422 is connected to the passivated implanted planar silicon detector 421, and is configured to amplify a detection signal provided by the passivated implanted planar silicon detector 421 to generate an amplified detection signal; the multichannel analyzer 423 is connected to the preamplifier 422, and is configured to receive the amplified detection signal, and generate a pulse signal for feeding back the content of the radioactive substance in the aerosol according to the amplified detection signal, so as to analyze the content of the radioactive aerosol in the air to be detected via the pulse signal.
Further, referring to fig. 5, in an embodiment of the present application, the aerosol monitoring device further includes a controller 50, the controller 50 is connected to the solenoid valve 30 and the multichannel analyzer 423, and is configured to control the on/off and/or the duty cycle of the solenoid valve 30 to control a measurement mode of the aerosol monitoring device and a flow rate of the airflow flowing through the air inlet of the sealed sampling chamber; the controller 50 is further configured to receive the pulse signal, and determine the content of the radioactive substance in the aerosol according to the pulse signal.
Further, referring to fig. 6a and 6b, in an embodiment of the present application, the aerosol monitoring device further includes a touch display screen 60, the touch display screen 60 is connected to the controller 50 and disposed on the top of the supporting body 101, and an included angle a between an extending direction of the touch display screen 60 and a height direction of the supporting body 101 is smaller than 90 degrees; the touch display screen 60 is used for displaying the measurement result and/or the measurement parameter; the touch display screen 60 is also used for inputting control signals and/or configuration parameters. Arrange at the equipment top with the mode of slope through setting up touch-control display screen 60 for the customer looks over and operates, avoids bowing or squat. The real-time detection data of the aerosol monitoring device can be stored by the controller 50, the user can conveniently acquire the stored real-time detection data through the touch display screen 60, the stored real-time detection data can also be displayed in a graphical mode through the touch display screen 60, and the user can conveniently process and analyze the real-time detection data.
As an example, please refer to fig. 6a and fig. 6b, in an embodiment of the present application, the duty cycle parameter of the electromagnetic valve 30 can be input through the touch display screen 60, so as to control the opening and closing of the electromagnetic valve 30 and the duty cycle to control the measurement mode of the aerosol monitoring device to be a periodic measurement mode, so as to periodically measure the content of the aerosol in the air flow flowing in through the air inlet of the sealed sampling chamber 10, and finally the air flow in the sealed sampling chamber 10 can flow out to the outside through the air outlet 21 of the vacuum pump 20. The measurement mode of the aerosol monitoring device can be controlled to be a continuous/periodic combined measurement mode by controlling the opening and closing and the working period of the electromagnetic valve 30, so that multiple measurements can be performed, and the average value of the multiple measurement results can be obtained as the final measurement result of the content of the aerosol, so that the accurate measurement of the content of the aerosol in the air can be realized.
As an example, please refer to fig. 6a and fig. 6b, in an embodiment of the present application, the touch display screen 60 may be a touch display screen with a low resolution and a small area, so as to save cost and facilitate a user to observe real-time operating parameters of the aerosol monitoring device through the touch display screen 60 or configure operating parameters of the aerosol monitoring device through the touch display screen 60.
Further, referring to fig. 7, in an embodiment of the present application, the aerosol monitoring device further includes a flow meter 70, where the flow meter 70 is disposed in an airflow path between the sealed sampling chamber 10 and the vacuum pump 20, and is used for detecting a gas flow rate in the airflow path to improve visibility of the aerosol monitoring device.
Further, referring to fig. 8a and 8b, in an embodiment of the present application, the aerosol monitoring device further includes a storage box 81, the storage box 81 is connected to the supporting body 101 via a sliding rail 82, and the storage box 81 is configured to include a first state (as shown in fig. 8 a) located inside the supporting body 101, a second state sliding along the direction shown by the arrow in fig. 8b via the sliding rail, and a third state partially sliding out of the supporting body, so as to place accessories in the storage box 81 and allow a user to pull out the storage box 81 through the sliding rail 82. In other embodiments of the present application, a cabinet door (not shown) that can be opened may be further disposed on the front surface of the supporting body 101, and when the cabinet door is opened by a user, the storage box 81 may be pulled out via the sliding rail 82, and other debugging or maintenance operations on the device may be performed. After the accessory is placed in the storage box 81, the storage box 81 can be pushed into the supporting body 101 through the sliding rail 82, so that the accessory is prevented from being damaged by dust or rainwater, and a user can conveniently place and obtain the accessory.
Further, referring to fig. 8a and 8b, in one embodiment of the present application, the supporting body 101 may be provided with a waterproof grade of ip 42.
The aerosol monitoring device provided in the embodiment of the application realizes measurement in a vacuum state by using the closed sampler and the electromagnetic valve, solves the technical problem of air interference between the detector and the accumulated aerosol, and remarkably improves the detection performance of the aerosol in the gas to be detected; the touch display screen is obliquely arranged, so that a user can conveniently check and analyze data; the application solves the problems that the accessory cannot be conveniently obtained when the equipment is outdoors or the accessory is damaged by dust or rainwater by using the built-in storage box; the problem that the operation of squatting or bending is inconvenient when the equipment is operated is solved by using the touch display screen which is obliquely arranged; according to the method and the device, the convenience is brought to the user to utilize the three measurement modes for combined measurement, and the problem that the scientific research user cannot rapidly adjust the measurement modes during measurement is solved.
Note that the above embodiments are for illustrative purposes only and are not meant to limit the present application.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
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. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An aerosol monitoring device, comprising a support body and a sensor disposed in the support body:
the device comprises a closed sampling chamber, a gas sampling and detecting device and a gas sampling and detecting device, wherein the closed sampling chamber is internally provided with the gas sampling and detecting device and is used for sampling and detecting the content of the gas in the gas flow flowing in through a gas inlet of the closed sampling chamber;
the vacuum pump is communicated with the inside of the closed sampling chamber and is used for providing a closed vacuum environment for the closed sampling chamber;
the air inlet passage of the closed sampling chamber is provided with an electromagnetic valve, and the measurement mode of the aerosol monitoring device is controlled by controlling the opening and closing and/or the working cycle of the electromagnetic valve, wherein the measurement mode comprises at least one of a continuous measurement mode, a periodic measurement mode and a continuous/periodic combined measurement mode.
2. An aerosol monitoring device according to claim 1, wherein the aerosol sampling probe device comprises:
the sampling device is used for collecting aerosol in the airflow flowing in through the air inlet of the closed sampling chamber;
the detection device is arranged at an interval with the sampling device, the orthographic projection of the detection surface of the detection device on the sampling surface of the sampling device is positioned in the middle of the sampling surface, and the detection device is used for detecting the content of the aerosol collected by the sampling device.
3. An aerosol monitoring device according to claim 2, wherein the sampling device comprises:
the extending direction of the filter paper is vertical to the air inlet direction of the air inlet of the closed sampling chamber, and the filter paper is used for filtering and accumulating aerosol in the airflow flowing through the surface of the filter paper; and
and the driving device is connected with the filter paper and is used for driving the filter paper to move so as to replace the filter paper filtering surface for filtering and accumulating the aerosol.
4. An aerosol monitoring device according to claim 3, wherein the detection means comprises:
and the detection surface of the passivation injection plane silicon detector is parallel to the filter surface of the filter paper at intervals, and the orthographic projection of the detection surface on the filter surface is positioned in the middle of the filter surface.
5. The aerosol monitoring device of claim 4, wherein the detection surface of the passivated implanted planar silicon detector is spaced from the filter paper filter surface by a distance of 1mm to 10 mm.
6. An aerosol monitoring device according to claim 4, wherein the detection means comprises:
the preamplifier is connected with the passivation injection plane silicon detector and is used for amplifying the detection signal provided by the passivation injection plane silicon detector to generate an amplified detection signal;
and the multichannel analyzer is connected with the preamplifier and used for receiving the amplified detection signal and generating a pulse signal for feeding back the content of the radioactive substances in the aerosol according to the amplified detection signal.
7. An aerosol monitoring device according to claim 6, further comprising:
the controller is connected with the electromagnetic valve and the multichannel analyzer and is used for controlling the opening and closing and/or the working period of the electromagnetic valve to control the measuring mode of the aerosol monitoring device and the flow of the airflow flowing in through the air inlet of the closed sampling chamber;
the controller is also used for receiving the pulse signal and judging the content of the radioactive substances in the aerosol according to the pulse signal.
8. An aerosol monitoring device according to claim 7, further comprising:
the touch display screen is connected with the controller and arranged at the top of the supporting body, and an included angle between the extending direction of the touch display screen and the height direction of the supporting body is smaller than 90 degrees.
9. An aerosol monitoring device according to any of claims 1 to 7, further comprising:
and the flowmeter is arranged in an airflow passage between the closed sampling chamber and the vacuum pump and used for detecting the gas flow in the airflow passage.
10. An aerosol monitoring device according to any of claims 1 to 7, further comprising:
the storage box is connected with the support body through a sliding rail and is configured to comprise a first state located inside the support body, a second state sliding through the sliding rail and a third state partially sliding out of the support body.
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| CN202011591131.3A CN112816375A (en) | 2020-12-29 | 2020-12-29 | Aerosol monitoring device |
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| CN202011591131.3A CN112816375A (en) | 2020-12-29 | 2020-12-29 | Aerosol monitoring device |
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