CN110553961A - portable monitoring mechanism and monitoring method for concentration of atmospheric particulate matter - Google Patents
portable monitoring mechanism and monitoring method for concentration of atmospheric particulate matter Download PDFInfo
- Publication number
- CN110553961A CN110553961A CN201910749005.7A CN201910749005A CN110553961A CN 110553961 A CN110553961 A CN 110553961A CN 201910749005 A CN201910749005 A CN 201910749005A CN 110553961 A CN110553961 A CN 110553961A
- Authority
- CN
- China
- Prior art keywords
- tape reel
- beta
- reel
- monitoring mechanism
- tape
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2273—Atmospheric sampling
-
- 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
- G01N15/0618—Investigating concentration of particle suspensions by collecting particles on a support of the filter type
Abstract
The invention provides a portable atmospheric particulate concentration monitoring mechanism, which comprises a sampling rod and a monitoring host, wherein the monitoring host comprises: a box body; the driving device comprises an air port moving unit and a paper tape moving unit; a sealing device; a flow control device; a detection device; the paper tape moving unit comprises a paper tape, a first tape reel, a second tape reel in transmission connection with the first tape reel, a supporting wheel and a first motor, wherein the paper tape is wound on the first tape reel through the second tape reel, the supporting wheel and the detection device, a distance of 5-15cm is reserved between the first tape reel and the second tape reel, and the surface of the detection device is provided with an arc surface. The portable atmospheric particulate concentration monitoring mechanism provided by the invention has the advantages of simple and compact structure, convenience in carrying and small load.
Description
Technical Field
The invention belongs to the technical field of atmospheric particulate matter monitoring, and particularly relates to a portable atmospheric particulate matter concentration monitoring mechanism and a monitoring method thereof.
Background
In recent years, with the continuous promotion of urbanization and industrialization, atmospheric particulates become the first pollutants affecting the air quality of urban environments in China, especially in spring floating dust weather, autumn straw burning period and winter heating period. The particulate matter mainly refers to inhalable particulate matter (PM10, i.e., particulate matter having an aerodynamic equivalent diameter of 10 μm or less) and fine particulate matter (PM2.5, i.e., particulate matter having an aerodynamic equivalent diameter of 2.5 μm or less) and is divided into primary particulate matter and secondary particulate matter.
At present, monitors on the market are large in size, complex in structure, inconvenient to carry, and unstable in test process, so that measurement errors are caused.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a portable monitoring mechanism and a monitoring method for monitoring the concentration of atmospheric particulates, which are used to solve various drawbacks of the monitoring mechanism for monitoring the concentration of atmospheric particulates in the prior art.
In order to achieve the above and other related objects, the present invention provides a portable atmospheric particulate concentration monitoring mechanism, which includes a sampling rod and a monitoring host, wherein one end of the sampling rod is connected to the atmosphere, and the other end of the sampling rod is connected to the monitoring host, and the monitoring host includes: the surface of the box body is provided with a display; the driving device is positioned in the box body and comprises an air port moving unit and a paper tape moving unit and is used for forming an air path; the sealing device is positioned in the box body and seals the air path to form a communicated air path; the flow control device is connected with the gas path and is used for controlling the flow of the atmospheric particulates in the gas path; the detection device is connected with the driving device and is used for detecting the concentration of the atmospheric particulate matters in the gas path; the paper tape moving unit comprises a paper tape, a first tape reel, a second tape reel in transmission connection with the first tape reel, a supporting wheel and a first motor, wherein a rotating shaft of the first tape reel is connected with the first motor, the second tape reel is in transmission connection with the first tape reel, the paper tape is wound on the first tape reel through the second tape reel, the supporting wheel and the detection device, an interval of 5-15cm is formed between the first tape reel and the second tape reel, and the surface of the detection device is provided with an arc surface.
In a disclosed embodiment, the first reel is higher in fixed position than the second reel.
In a specific embodiment of the disclosure, a spring is sleeved on the surface of the rotating shaft of the second reel.
In a specific embodiment disclosed in the present invention, the air port moving unit includes a second motor, a bearing, a connecting sleeve sleeved on the surface of the bearing, and a lifting unit, and the bearing drives the lifting unit to move up and down through the second motor and the connecting sleeve.
in a specific embodiment disclosed in the present invention, a limiting block is disposed between the second motor and the connecting sleeve.
In one embodiment of the present disclosure, the detecting device includes a beta ray detecting unit; the data processing unit is connected with the beta ray detection unit; the beta-ray detection unit comprises a beta-ray radiation source positioned in the cavity of the motion part and a beta-ray receiving and measuring unit arranged opposite to the beta-ray radiation source, and the paper tape is placed between the beta-ray radiation source and the beta-ray receiving and measuring unit.
In a specific embodiment of the present disclosure, the sealing device is a foamed O-ring.
In a specific embodiment disclosed in the present invention, the monitoring mechanism further includes a dynamic heating device, and the dynamic heating device is sleeved on the sampling rod and is used for heating the atmospheric particulates.
The invention also discloses a monitoring method of the concentration of the atmospheric particulates, which comprises the step of monitoring the concentration of the atmospheric particulates by using the portable monitoring mechanism of the concentration of the atmospheric particulates.
According to the portable atmospheric particulate concentration monitoring mechanism provided by the invention, the paper tape moving unit improves the stability of a paper tape in the rotating process of the tape reels, improves the accommodating efficiency of an accommodating space in the detection host and reduces the volume of the monitoring mechanism by utilizing the height difference and the spacing difference between the first tape reel and the second tape reel and the arrangement of the arc surface on the surface of the detection device. In addition, the driving device drives the air port moving unit to be in contact with and separated from the paper tape moving unit by utilizing the rotation of the connecting sleeve and the bearing, relative rolling is generated by the driving of the bearing, abnormal sound is eliminated, the movement is labor-saving, the efficiency is high, and the atmospheric particulate concentration monitoring mechanism is simple and compact in structure and convenient to carry. Other features, benefits and advantages will be apparent from the disclosure including the description and claims detailed herein.
drawings
fig. 1 is a schematic structural diagram of a portable atmospheric particulate concentration monitoring mechanism according to an embodiment of the present invention.
Fig. 2 shows a front cross-sectional view of the monitoring mechanism of fig. 1.
Fig. 3 shows a top view of the monitoring mechanism of fig. 1.
Fig. 4 is a schematic flow chart of a monitoring method of the portable atmospheric particulate monitor according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Referring to fig. 1 to 3, the present invention provides an embodiment of a portable atmospheric particulate concentration monitoring mechanism. The portable atmospheric particulate matter concentration monitoring mechanism is used for detecting the concentration of suspended particulate matters contained in air, wherein the suspended particulate matters are PM2.5 atmospheric particulate matters or PM10 atmospheric particulate matters.
Specifically, referring to fig. 1, the portable atmospheric particulate concentration monitoring mechanism includes: a sampling rod (not shown in the figure) and a monitoring host 100. One end of the sampling rod, for example, an air inlet, is connected to the atmosphere, and the other end, namely, an air outlet, is connected to the monitoring host 100. The shape and material of the sampling rod are not particularly limited, such as tubular glass, for collecting and transporting the atmospheric particulates into the monitoring host 100, and further, the sampling rod is covered with, for example, a stainless steel member to protect the sampling rod.
It should be noted that a cutting head (not shown) may be provided at the top end of the sampling rod during actual use. The concentration of atmospheric particulates of different particle sizes was tested by changing the type of cutting head 1 (e.g. PM10, PM2.5, TSP) to cut different particle sizes.
Referring to fig. 1 to 3, the monitoring host 100 includes a box 101, a driving device, a sealing device, a flow control device, and a detection device for receiving and acquiring the concentration of the atmospheric particulates from the sampling rod.
Referring to fig. 1, an opening 10 connected to the gas outlet end of the sampling rod is formed at the top end of the box 101, and the material and shape of the box 101 are not particularly limited, such as a housing with certain strength and rigidity, for accommodating the driving device and the detecting device, specifically, for example, a steel casting box, a steel plate welded box, and a plastic box. The portable atmospheric particulate concentration monitoring mechanism provided by the invention is a portable assembling machine, the box body and the devices in the box body are integrally formed and are not detachable, and the size of the box body 101 has the length of 25-40cm, the width of 35-50cm and the height of 25-40cm, for example.
Referring to fig. 1, a display 101a, such as a liquid crystal display, is disposed on a surface of the box 101. For data that will reflect the measurements in real time.
Referring to fig. 1, the box 101 has a fixing plate 102 integrally formed with the box 101 to divide the inspection main unit 100 into an outer unit and an inner unit, so as to facilitate installation and fixation of the devices in the inspection main unit 100.
Referring to fig. 2 and 3, fig. 2 is a cross-sectional view through the case 101, and the driving device is located in the case 101 and includes an air port moving unit and a paper tape moving unit, and an air path for detection by a detecting device described below is formed by the contact and separation of the air port moving unit and the paper tape moving unit. Specifically, in a specific embodiment of the present disclosure, the paper tape moving unit includes a paper tape 201, a first reel 202, a second reel 203 in transmission connection with the first reel 202, a support wheel 204, and a first motor 205. The air port moving unit includes a second motor 206, a bearing 207, a connecting sleeve (not shown) sleeved on the bearing surface, and a lifting unit.
It should be noted that the paper tape 201 is made of, for example, a glass fiber film or a quartz film in the range of 50-100g/m2, and is used for enriching the atmospheric particulates from the sampling rod and the air port moving unit and providing a direct test object for the detection device as described below.
Referring to fig. 2, the first tape reel 202 and the second tape reel 203 are used for holding the paper tape 201, a rotating shaft 202a of the first tape reel 202 is connected to the first motor 205, and the second tape reel 203 is in transmission connection with the first tape reel 202. For example, the rotating shaft 203a of the second reel 203 is mounted on the fixing plate 102 to rotate freely on the fixing plate 102, and the rotating shaft 202a of the first reel 202 is in transmission connection with the rotating shaft 203a of the second reel 203 through the paper tape 201. The paper tape 201 is wound on the first tape reel 202 via the second tape reel 203, the support wheel 204, the detection means.
Referring to fig. 2, it should be noted that the first reel 202 and the second reel 203 have different heights, for example, the position of the first reel 202 on the fixing plate 102 is higher than the position of the second reel 203 on the fixing plate 102, so that when the paper tape 201 passes through the detecting device and is wound on the first reel 202, the angle α between the outlet end of the paper tape 201 and the detecting device is consistent with the expectation, and further, has 40-75 degrees, thereby avoiding the paper tape from breaking during the winding process. When the angle is low 40 degrees, the contained angle is too little, and the paper tape atress is uneven, and easy the fracture appears, when the angle is higher than 75 degrees, the position of first tep reel 202 is too close to detection device, easily bump as follows detailed detection device in the first tep reel 202 coiling process, cause the detection condition unstable, and block the assembly of other devices. Further, the first tape reel 202 and the second tape reel 203 have a distance of 5-15cm, for example, 10cm, and the first tape reel 202 and the second tape reel 203 can be arranged in the above range, for example, so that the stability during the test process can be well ensured and the paper tape 201 can be prevented from breaking during the winding process.
it should be noted that the surface of the detection device has a circular arc surface, which improves the gentle transition of the paper tape 201 onto the first tape reel 202 when the paper tape is extended, and further avoids the paper tape from breaking during the winding process.
The surface of the rotating shaft 203a of the second reel 203 is sleeved with a spring (not shown in the figure) for chucking the second reel 203, so that the second reel 203 can be tensioned when not rotating, thereby avoiding the problem that the second reel 203 is not easy to control and the paper tape 201 is loose, which results in the incapability of testing.
Referring to fig. 2, the supporting wheel 204 is mounted on the fixing plate 102 through a rotating shaft, the supporting wheel 204 is located at the same height position as the lifting unit of the driving device for smoothly guiding the paper tape 201 to the lifting unit of the driving device, the material of the supporting wheel 204 is, for example, a cylindrical metal wheel, and the surface of the supporting wheel 204 is a frosted surface.
Referring to fig. 1 to 3, in an embodiment of the present disclosure, in the case 101, the first motor 205 is located at one side of the fixing plate 102, i.e., an inner unit, the paper tape 201, the first tape reel 202, the second tape reel 203, and the supporting wheel 204 are located at the other side of the fixing plate 102, i.e., an outer unit, and a rotating shaft 202a of the first tape reel 202 penetrates through the fixing plate 102 and is connected to the first motor 205. Further, a plurality of holders are mounted on the fixing plate 102 for supporting the paper tape 201, the first reel 202, the second reel 203, the supporting wheel 204, and the first motor 205.
The first motor 205 and the second motor 206 are not particularly limited, and may be claw pole motors, for example, and the rotation steps of the first motor 205 and the second motor 206 are controlled by photoelectric switches (not shown) disposed in the casing 101.
Referring to fig. 1 and 3, the bearing 207, such as a ball bearing, drives the lifting unit to move up and down through the second motor 206 and the connecting sleeve 208, such as an eccentric bushing. Specifically, the ball bearing in the bearing seat is connected with the second motor 206 through a connecting sleeve 208, the other end of the ball bearing is connected with the lifting unit, when the second motor 206 rotates, the connecting sleeve 208 drives the bearing to revolve around the second motor 206, and meanwhile, the bearing rotates to drive the lifting unit to reciprocate up and down, so that the air port movement unit is in contact with and separated from the paper tape movement unit.
Referring back to fig. 2, in an embodiment of the present disclosure, the fixed portion 209 and the moving portion 210 form a lifting unit. The fixing portion 209 is fixed on the fixing plate 102, for example, a through hole for connecting the bearing and the connecting sleeve is opened on the end surface of the fixing portion 203, and a first air path for communicating the sampling rod is opened in the fixing portion 209 for receiving and conveying atmospheric particulates from the sampling rod. The moving part 210 is movably connected to the fixed plate 102 and is in transmission connection with the fixed part 209, for example, a driving shaft is arranged on the fixed part 209 and is in transmission connection with a driven shaft on the moving part 210 through a coupler to drive the moving part 210 to move up and down, and a second air path corresponding to the first air path is arranged in the moving part 210 and is used for receiving and conveying atmospheric particulates from the first air path. The first sealing device 301 is arranged between the fixing part 209 and the moving part 210, and seals an air path between the fixing part 203 and the moving part 204, so that a communicated air path is formed in the lifting process of the lifting unit. It should be understood that the embodiment of the lifting unit is merely illustrated, and any lifting unit capable of contacting and separating the air port moving unit and the paper tape moving unit should be covered within the scope of the claimed invention.
Referring to fig. 1 to 3, the second motor 206 is located at one side of the fixed plate 102, i.e. an inner unit, such as a lifting unit composed of a fixed part 209 and a moving part 210, and located at the other side of the fixed plate 102, i.e. an outer unit, and the connecting sleeve 208 penetrates through the fixed plate 102 and is connected with the fixed part 209 of the lifting unit. Further, a limit block 206a is arranged between the second motor 206 and the connecting sleeve 208 and is located at a position close to the inner side unit of the fixing plate 102, so that the rotation process of the second motor 206 is stable, and measurement errors caused by abnormal rotation of the monitoring mechanism provided by the invention are avoided. Further, a plurality of brackets are mounted on the fixing plate 102, and are used for supporting the second motor 206, the bearing 207, the connecting sleeve 208, the fixing portion 209 and the moving portion 210 on the lifting unit.
during the monitoring operation of the concentration of the atmospheric particulates, the first motor 205 is started to rotate, the second reel 203 rotates along with the rotation of the first reel 202, the blank paper tape on the second reel 203 is driven to move forwards, and in a measuring period, the blank paper tape is fixed, and the data of the blank paper tape is detected through a detection device as described below; then the second motor 206a starts to rotate, the lifting unit of the air port moving unit moves downwards, the air port of the air port moving unit contacts the blank paper tape and is sealed by the sealing device to form a communicated air path, then the blank paper tape adsorbs the atmospheric particulates from the connecting sampling rod under the control of the flow control device, the second motor 206 rotates again, the lifting unit of the air port moving unit moves upwards, the air port leaves the paper tape adsorbing the atmospheric particulates, the air path is disconnected, the concentration of the atmospheric particulates is detected by the detection device, at this time, a measurement period is finished, the first motor 205 rotates again, the adsorbed paper tape continues to advance and is wound on the first reel 202, and meanwhile, the next blank paper tape on the second reel 203 is driven to advance, and enters the next measurement cycle.
Referring back to fig. 2, the sealing device is located in the box 101 and is used for forming a communicated gas path, and specifically, in an embodiment of the disclosure, the sealing device has a first sealing device 301 and a second sealing device 302, which are respectively located on the driving device and the detecting device, and are used for sealing the gas path of the atmospheric particulates entering and exiting the monitoring host 100 to form a communicated gas path.
Referring to fig. 2, specifically, the first sealing device 301 is located between the fixed portion 209 and the moving portion 210 of the lifting unit in the driving device, in the downward movement process of the lifting unit, the moving portion 210 is away from the fixed portion 209, the air port contacts the paper tape, the first sealing device 301 expands and seals to seal the upper cavity, and the air path is communicated; in the process of upward movement of the lifting unit, the moving part 210 is close to the fixed part 209, the air port is far away from the paper tape, the air path is cut off, and the first sealing device 301 is compressed.
Referring next to fig. 2, the second sealing device 302 is located at the lower end of the detection device to seal the lower cavity.
It should be noted that the first sealing device 301 and the second sealing device 302 are, for example, identical or different O-rings, for example, foamed O-rings, having, for example, a diameter of 5mm to 20 mm. It should be understood that the first sealing device 301 and/or the second sealing device 302 include, but are not limited to, O-rings, and any sealing device capable of forming a communicating air path during the measurement of the atmospheric particulate concentration by the driving device should be considered to be within the scope of the present invention.
referring next to fig. 1 and 3, the flow control device is connected to the gas path for controlling the flow of the atmospheric particulates in the gas path. The flow control device comprises an air pump (not shown in the figure), and a flow valve 401, a flow sensor (not shown in the figure) and a flow meter (not shown in the figure) which are fixed at an air inlet of the air pump, wherein the air pump is externally arranged near the monitoring host 100, the flow valve is positioned in an inner side unit of a fixing plate 102 of the monitoring host 100 and is communicated with an air outlet 402 on the monitoring host 100 through a valve pipe, so that the air passage is connected, and the system is pumped by the air pump. The flow valve is, for example, an eccentric flow valve. In the portable atmospheric particulate concentration monitoring mechanism provided by the invention, the flow control device intermittently exhausts the air path from the whole system, and during monitoring operation, a measurement period is formed, for example, when the air pump does not exhaust air, particulate does not flow, and when the air pump exhausts air, atmospheric particulate flows in the direction of the paper tape 201 according to a predetermined flow, for example, 1-10L/min, and is discharged from the system from the air path.
During monitoring operation of the concentration of atmospheric particulates, in a measurement period, the blank paper tape is fixed, the air pump is closed, the air pump does not pump air, and the detection device detects the blank paper tape to obtain a first monitored concentration; the air port moving unit's lift unit downstream, the gas port contact blank paper tape, and the warp the sealed gas circuit that forms the intercommunication of sealing device, the air pump starts, and the air pump is bled, comes from the intercommunication atmospheric particulates enrichment in the gas circuit of sampling rod is in on the blank paper tape, after the air pump was closed, the gas port left blank paper tape, detection device detects the paper tape that adsorbs atmospheric particulates, acquires the second monitoring concentration, acquires through predetermined ratio relation atmospheric particulates's concentration.
referring to fig. 2, the detecting device is connected to the driving device for detecting and obtaining the concentration of the atmospheric particulates. In an embodiment of the present disclosure, the detecting device includes a beta-ray source 501 located in the cavity of the moving part 210, a beta-ray receiving and measuring unit 502 disposed opposite to the beta-ray source, and a data processing unit (not shown in the figure).
Referring to fig. 2, in an embodiment of the present disclosure, a beta-ray detection unit is composed of the beta-ray radiation source 501 and a beta-ray receiving and measuring unit 502 disposed opposite to the beta-ray radiation source, and the concentration of the atmospheric particulates is monitored by the beta-ray method. The beta-ray radiation source 501 is disposed in the cavity of the moving part 210 of the driving device, and is close to the second air path. The beta ray radiation source 501 and the beta ray receiving and measuring unit 502 are arranged opposite to each other, and the paper tape 201 is arranged between the beta ray radiation source 501 and the beta ray receiving and measuring unit 502. The relative positions of the beta-ray radiation source 501 and the beta-ray receiving and measuring unit 502 arranged opposite to the beta-ray radiation source and the paper tape 201 are kept unchanged, and the two measurement conditions are kept consistent.
Specifically, when the beta ray passes through a certain thickness of the absorbing substance, the intensity of the beta ray gradually decreases with the increase of the thickness of the absorbing substance, and beta absorption is generated, and when the thickness of the absorbing substance is much smaller than the range of the beta particle, the absorption of the beta ray in the substance is approximately:
In the formula I0For intensity without absorbing material, I is the beta ray through a thickness tmafter absorption of the substance, umCalled the mass absorption coefficient, in cm2/g；tmReferred to as mass thickness in g/cm2，
The detector means records the intensity I of the beta radiation as it passes through the paper strip 2011Obtained by the formula (1):
then, a certain amount of air is sucked in through a sampling rod collection air path through a flow control device, and atmospheric particulates are enriched on the paper tape;
Subsequently, the detector records the intensity I2 of the β -rays passing through the filter paper, which is obtained from the formula (2):
Wherein Δ m is expressed in units of mass thickness g/m3 of the atmospheric particulates, and when the detection conditions are kept consistent, I0Remains unchanged throughout the measurement, as derived from equations (2) and (3):
And deltam is the content density of the atmospheric particulate matters in each cubic meter of air, and the concentration of the atmospheric particulate matters in the air is calculated and displayed through the data processing unit.
Specifically, the data processing unit includes a collector, a processor, a memory, a circuit control system, and a display 503; the input end of the collector is connected with the output end of the beta ray receiving and measuring unit 502, the electric signal of the beta ray receiving and measuring unit 502 is collected, the output end of the collector is connected with the input end of the processor, and the processed measuring data is stored in the first memory through the output end of the processor; the memory is connected with the display and displays the measuring result.
Referring back to fig. 1 and 3, when the monitoring operation of the atmospheric particulate concentration is performed, in a measurement period, the blank paper tape is fixed, the lifting unit of the air port moving unit moves downward, the air port contacts the blank paper tape and is sealed by the sealing device to form a communicated air path, then the atmospheric particulate is enriched on the surface of the paper tape 201 under the control of the flow control device, and then the beta-ray radiation sources 501 sequentially irradiate the paper tape 201 to form dust spots, and the dust spots are received by the beta-ray receiving and measuring unit 502 and transmitted to the data processing unit, so as to obtain the concentration of the atmospheric particulate in the air.
Referring back to fig. 1, the portable atmospheric particulate concentration monitoring mechanism further includes a dynamic heating device, the dynamic heating device includes a dynamic heater (not shown in the figure) fixed on the sampling rod for monitoring the air temperature and humidity in the sampling rod, the air temperature and humidity data detected by the dynamic heater is transmitted to the detection device, and the detection device controls the heating operation thereof, such as controlling the dynamic heater to start, close, and adjust the heating power. The dynamic heating system may comprise, for example, thermal cotton, and a waterproof housing, so that the portable atmospheric particulate concentration monitoring mechanism can be used outdoors.
Referring to fig. 4, the present invention also discloses a method for monitoring the concentration of atmospheric particulates in air, the method comprising: steps S1-S2.
And step S1, providing the portable atmospheric particulate concentration monitoring mechanism.
And step S2, collecting the atmospheric particulates in the air at a certain flow rate by the portable atmospheric particulate concentration monitoring mechanism, and calculating the concentration of the atmospheric particulates in the air.
Specifically, within one cycle, the paper tape is fixed: the air port of the air port movement unit is located at the original position, the air pump is closed, the detection device irradiates the surface of the blank paper tape to be detected, and the detected surface data are taken as detection data. The detection data are obtained, for example, by a beta-ray source and a beta-ray receiving and measuring mechanism, i.e. the intensity I of beta-rays passing through a blank paper tape1。
The air port of the air port movement unit is in contact with the paper tape of the paper tape movement unit, the air pump is started, air flows through the sampling rod and enters the monitoring host 100, then sequentially passes through the paper tape 201, atmospheric particulates are enriched in an area capable of being detected, and the atmospheric particulates are exhausted from the monitoring host 100 through the air pump.
The air port of the air port movement unit is located in the original position, the air pump is closed, the detection device irradiates and detects the surface of the paper tape enriched with the atmospheric particulates, and the detected surface data is taken as detection data. The detection data are acquired, for example, by a beta-ray source and a beta-ray receiving and measuring device, i.e. when beta-rays pass through a paper strip enriched with atmospheric particulatesStrength I2。
according to a predetermined ratio stored in said data processing unit, i.e.And calculating the concentration of the atmospheric particulate matters in the air, and displaying the measurement result.
This send through the monitoring mechanism of portable atmospheric particulates concentration that provides, in predetermined cycle, keep detection device's height unchangeable to through control flow control device, detect the facula intensity of the blank paper tape department that does not adsorb and the facula intensity of the paper tape department that has adsorbed atmospheric particulates respectively at the same position department of paper tape, accomplish test cycle. The detection method is sensitive and convenient to test and reliable in data.
in conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value. The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. The utility model provides a monitoring mechanism of portable atmospheric particulates concentration, a serial communication port, monitoring mechanism includes sampling rod and monitoring host computer, atmosphere is connected to the one end of sampling rod, and the other end is connected the monitoring host computer, the monitoring host computer includes:
The surface of the box body is provided with a display;
The driving device is positioned in the box body and comprises an air port moving unit and a paper tape moving unit and is used for forming an air path;
The sealing device is positioned in the box body and seals the air path to form a communicated air path;
The flow control device is connected with the gas path and is used for controlling the flow of the atmospheric particulates in the gas path;
The detection device is connected with the driving device and is used for detecting the concentration of the atmospheric particulate matters;
The paper tape moving unit comprises a paper tape, a first tape reel, a second tape reel in transmission connection with the first tape reel, a supporting wheel and a first motor, wherein a rotating shaft of the first tape reel is connected with the first motor, the second tape reel is in transmission connection with the first tape reel, the paper tape is wound on the first tape reel through the second tape reel, the supporting wheel and the detection device, an interval of 5-15cm is formed between the first tape reel and the second tape reel, and the surface of the detection device is provided with an arc surface.
2. The portable atmospheric particulate concentration monitoring mechanism of claim 1, wherein: the fixed position of the first reel is higher than the second reel.
3. The portable atmospheric particulate concentration monitoring mechanism of claim 1 or 2, wherein: and a spring is sleeved on the surface of the rotating shaft of the second tape reel.
4. The portable atmospheric particulate concentration monitoring mechanism of claim 1 or 2, wherein the air port movement unit comprises a second motor, a bearing, a connecting sleeve sleeved on the surface of the bearing, and a lifting unit, and the bearing drives the lifting unit to move up and down through the second motor and the connecting sleeve.
5. The portable atmospheric particulate concentration monitoring mechanism of claim 1, wherein: and a limiting block is arranged between the second motor and the connecting sleeve.
6. The portable atmospheric particulate concentration monitoring mechanism of claim 1, wherein: the detection device comprises a detection device and a control device,
A beta ray detection unit;
the data processing unit is connected with the beta ray detection unit;
The beta-ray detection unit comprises a beta-ray radiation source positioned in the cavity of the motion part and a beta-ray receiving and measuring unit arranged opposite to the beta-ray radiation source, and the paper tape is placed between the beta-ray radiation source and the beta-ray receiving and measuring unit.
7. The portable atmospheric particulate concentration monitoring mechanism of claim 1, wherein: the sealing device is an O-shaped ring.
8. The portable atmospheric particulate concentration monitoring mechanism of claim 1, wherein: the monitoring mechanism further comprises a dynamic heating device, wherein the dynamic heating device is sleeved on the sampling rod and used for heating the atmospheric particulates.
9. A method for monitoring the concentration of atmospheric particulates, characterized by monitoring the concentration of the atmospheric particulates by using the portable atmospheric particulates concentration monitoring mechanism of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910749005.7A CN110553961A (en) | 2019-08-14 | 2019-08-14 | portable monitoring mechanism and monitoring method for concentration of atmospheric particulate matter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910749005.7A CN110553961A (en) | 2019-08-14 | 2019-08-14 | portable monitoring mechanism and monitoring method for concentration of atmospheric particulate matter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110553961A true CN110553961A (en) | 2019-12-10 |
Family
ID=68737517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910749005.7A Pending CN110553961A (en) | 2019-08-14 | 2019-08-14 | portable monitoring mechanism and monitoring method for concentration of atmospheric particulate matter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110553961A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111337399A (en) * | 2020-04-09 | 2020-06-26 | 合肥福瞳光电科技有限公司 | Monitoring mechanism for concentration of atmospheric particulate matter |
| CN111982769A (en) * | 2020-08-30 | 2020-11-24 | 宋保德 | Rotatory detection device in turn of beta-ray method atmospheric particulates |
| CN113588357A (en) * | 2021-08-04 | 2021-11-02 | 中国科学院上海应用物理研究所 | Automatic paper feeding, sampling and measuring device for radioactive aerosol |
| 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 |
| CN113588357B (en) * | 2021-08-04 | 2024-05-03 | 上海中科新核智能科技有限公司 | Automatic paper feeding sampling and measuring device for radioactive aerosol |
-
2019
- 2019-08-14 CN CN201910749005.7A patent/CN110553961A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111337399A (en) * | 2020-04-09 | 2020-06-26 | 合肥福瞳光电科技有限公司 | Monitoring mechanism for concentration of atmospheric particulate matter |
| CN111337399B (en) * | 2020-04-09 | 2022-11-11 | 合肥福瞳光电科技有限公司 | Monitoring mechanism for concentration of atmospheric particulate matter |
| CN111982769A (en) * | 2020-08-30 | 2020-11-24 | 宋保德 | Rotatory detection device in turn of beta-ray method atmospheric particulates |
| CN111982769B (en) * | 2020-08-30 | 2023-07-07 | 宋保德 | Beta-ray method atmospheric particulate rotating alternate detection device |
| CN113588357A (en) * | 2021-08-04 | 2021-11-02 | 中国科学院上海应用物理研究所 | Automatic paper feeding, sampling and measuring device for radioactive aerosol |
| CN113588357B (en) * | 2021-08-04 | 2024-05-03 | 上海中科新核智能科技有限公司 | Automatic paper feeding sampling and measuring device for radioactive aerosol |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110553961A (en) | portable monitoring mechanism and monitoring method for concentration of atmospheric particulate matter | |
| CN210953726U (en) | Portable monitoring mechanism for concentration of atmospheric particulates | |
| CN106769741B (en) | Particulate matter concentration detection device and detection method | |
| CN108303356A (en) | A kind of atmosphere particulate matter monitoring instrument | |
| CN210953727U (en) | Monitoring mechanism for concentration of atmospheric particulate matter | |
| CN103759988B (en) | Atmospheric particulates collecting device | |
| CN111077049A (en) | Portable β ray method particulate matter concentration monitoring system | |
| CN110455692A (en) | A kind of mechanism for monitoring and monitoring method of atmosphere particle concentration | |
| KR101514300B1 (en) | Measuring method and filter performance measuring device of filter use of clean room | |
| CN109238790A (en) | A kind of multipassage rotary formula air granule sampler and its application method | |
| CN212008228U (en) | Atmospheric particulate concentration's monitoring facilities that makes an uproar falls | |
| CN209148041U (en) | A kind of chemical industry station-service portable air detection device | |
| CN203688303U (en) | Atmospheric particulate matter collection device | |
| CN116148147A (en) | Be used for portable high accuracy ambient air particulate matter sampling analysis appearance | |
| CN212008226U (en) | Atmospheric particulate concentration monitoring equipment | |
| CN212008227U (en) | Multichannel atmospheric particulates concentration monitoring mechanism | |
| JPS626547Y2 (en) | ||
| CN213275041U (en) | Constant temperature equipment for environmental air sampler | |
| CN213842953U (en) | Radioactive aerosol particle detection device | |
| CN2447777Y (en) | Beta ray dust gauge | |
| CN111337399B (en) | Monitoring mechanism for concentration of atmospheric particulate matter | |
| CN209086116U (en) | A kind of β ray PM2.5 on-line testing equipment of integral structure | |
| CN212364138U (en) | Atmospheric particulate on-line monitoring device | |
| CN216747645U (en) | Device for detecting volatile organic compounds in atmosphere | |
| CN108845086A (en) | A kind of mini air monitor of household |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |