CN210953726U - Portable monitoring mechanism for concentration of atmospheric particulates - Google Patents
Portable monitoring mechanism for concentration of atmospheric particulates Download PDFInfo
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- CN210953726U CN210953726U CN201921315452.3U CN201921315452U CN210953726U CN 210953726 U CN210953726 U CN 210953726U CN 201921315452 U CN201921315452 U CN 201921315452U CN 210953726 U CN210953726 U CN 210953726U
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Abstract
The utility model provides a monitoring mechanism of portable atmospheric particulates concentration, monitoring mechanism includes sampling rod and monitoring host computer, the monitoring host computer includes: 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. According to the utility model provides a monitoring mechanism of portable atmospheric particulates concentration simple structure is compact, convenient to carry, the load is little.
Description
Technical Field
The utility model belongs to the technical field of the atmospheric particulates monitoring, especially, relate to a monitoring mechanism of portable atmospheric particulates concentration.
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.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a portable monitoring mechanism and monitoring method for atmospheric particulates concentration, which are used to solve various defects in the monitoring mechanism for atmospheric particulates concentration in the prior art.
In order to realize above-mentioned purpose and other relevant purposes, the utility model provides a portable atmospheric particulates concentration's monitoring mechanism, monitoring mechanism includes sampling rod and monitoring host computer, the 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 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 particular embodiment of the present disclosure, the fixed position of the first reel is higher than the second reel.
In a preferred embodiment of the present invention, the spring is provided on the surface of the rotating shaft of the second reel.
The utility model discloses an among the specific embodiment, gas port motion unit includes that second motor, bearing, cover are established bearing surface's adapter sleeve, lift unit, the bearing passes through the second motor with the adapter sleeve drives lift unit up-and-down motion.
The utility model discloses an in the concrete embodiment, the second motor with the stopper has between the adapter sleeve.
In a specific embodiment of the utility model discloses a detection device includes, β ray detection unit, data processing unit, connect β ray detection unit, wherein, β ray detection unit is including being located β ray radiation source in the motion portion intracavity and the β ray reception measuring unit that sets up with β ray radiation source relatively, place the paper tape between β ray radiation source and the β ray reception measuring unit.
In a particular embodiment of the present disclosure, the sealing device is a foamed O-ring.
The utility model discloses an among the specific embodiment, monitoring mechanism still includes dynamic heating device, the dynamic heating device cover is established on the sampling rod, be used for right atmospheric particulates heats.
The utility model discloses still disclose a monitoring method of atmospheric particulates concentration, the method includes the monitoring mechanism monitoring that uses portable atmospheric particulates concentration as above the atmospheric particulates's concentration.
The utility model provides a monitoring mechanism and monitoring method of portable atmospheric particulates concentration, according to the utility model provides a monitoring mechanism of portable atmospheric particulates concentration, paper tape motion unit utilizes first tep reel with difference in height and the interval between the second tep reel are poor, and the setting of detection device surface arc surface improves the stability of tep reel at rotation in-process paper tape, and improves detect accommodation space's in the host computer holding efficiency, reduces monitoring mechanism's volume. Furthermore, drive arrangement utilizes the rotation of adapter sleeve and bearing to drive gas port motion unit and paper tape motion unit contact and separation, through the bearing drive produces relative roll, eliminates the abnormal sound, and not only the motion is laborsaving and efficient, the utility model discloses a portable atmospheric particulates concentration's monitoring mechanism, simple structure is compact, convenient to carry. Other features, benefits and advantages will be apparent from the disclosure including the description and claims detailed herein.
Drawings
Fig. 1 shows a schematic structural diagram of a specific embodiment of the portable atmospheric particulates concentration monitoring mechanism 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 specific embodiment of the monitoring method of the portable atmospheric particulates monitoring mechanism of the present invention.
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
Referring to fig. 1 to 3, the present invention provides a portable monitoring mechanism for atmospheric particulate matter concentration. The utility model discloses a monitoring mechanism of portable atmospheric particulates concentration for the suspended particles concentration that contains in the detection air, the suspended particles for example be, PM2.5 atmospheric particulates or PM10 atmospheric particulates.
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 utility model provides a monitoring mechanism of portable atmospheric particulates concentration is portable assembly machine, the box with device integrated into one piece in the box, can not dismantle, the size of box 101 has 25-40cm length for example, 35-50 cm's width, 25-40 cm's height.
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 the present invention, the paper tape moving unit includes a paper tape 201, a first tape reel 202, a second tape reel 203 in transmission connection with the first tape 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.
With reference next to fig. 2, it is noted that the first reel 202 and the second reel 203 have different heights, for example, the first reel 202 is located at a higher position on the fixed plate 102 than the second reel 203 is located on the fixed plate 102, such that when the paper tape 201 is wound on the first reel 202 via the detection device, an angle α between the exit end of the paper tape 201 and the detection device is as expected, and further, 40-75 degrees is provided to avoid a break in the paper tape during winding, when the angle is 40 degrees lower, the included angle is too small, the paper tape is not uniformly stressed and is prone to break, when the angle is higher than 75 degrees, the first reel 202 is located too close to the detection device, the first reel 202 is liable to collide with the detection device as described in detail below during winding, causing unstable detection conditions and blocking assembly of other devices, further, the first reel 202 and the second reel 203 have a spacing of 5-15cm, for example, 10cm, and the first reel 202 and the second reel 203 are arranged such that good stability of the paper tape during winding can be ensured by testing and the above-mentioned break in the winding process 201.
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 the 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 fixing 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 only illustrated, and any lifting unit capable of contacting and separating the air port moving unit and the paper tape moving unit should be covered by the protection scope of the present 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, the second motor 206 with have stopper 206a between the adapter sleeve 208, be located and be close to the inboard unit department of fixed plate 102 makes the second motor 206 rotates the process stability, avoids the utility model provides a monitoring mechanism rotates and leads to measuring error unusually. 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 for forming a communicating gas path, and specifically, in an embodiment of the present 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 seal the gas path of the atmospheric particulates passing in and out of the monitoring host 100 to form a communicating 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, an O-ring, and any sealing device capable of forming a connected air path during the measurement of the atmospheric particulate concentration by the driving device is also intended to be covered by 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. The utility model provides a monitoring mechanism of portable atmospheric particulates concentration, flow control device carries out intermittent type nature to the gas circuit that comes from whole system and bleeds, when monitoring the operation, forms measuring cycle, for example when the air pump does not bleed, the particulate matter does not flow, and when the air pump bled, atmospheric particulates flows according to predetermined flow, for example 1-10L/min to the direction of paper tape 201 to discharge the system in the follow gas circuit.
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 acquiring the concentration of the atmospheric particulates, in an embodiment of the present disclosure, the detecting device includes β radiation sources 501 and β radiation sources disposed opposite to each other in the cavity of the moving portion 210, a β radiation receiving and measuring unit 502, and a data processing unit (not shown).
Referring to fig. 2, in an embodiment of the present invention, the β radiation source 501 and the β 0 radiation receiving and measuring unit 502 disposed opposite to the β radiation source constitute a β radiation detecting unit, and the concentration of the atmospheric particulates is monitored by the β radiation method, the β radiation source 501 is disposed in the cavity of the moving portion 210 of the driving device, and is close to the second air path, the β radiation source 501 and the β radiation receiving and measuring unit 502 are disposed opposite to each other, and the paper tape 201 is disposed between the two, and the relative positions between the β radiation receiving and measuring unit 502 and the paper tape 201 disposed opposite to the β radiation sources 501 and β radiation sources are kept unchanged, and the two measuring conditions are kept consistent.
Specifically, when β rays pass through a certain thickness of absorbing material, the intensity gradually decreases with the increase of the thickness of the absorbing material, and β absorption is generated, and when the thickness of the absorbing material is much smaller than the range of β particles, the absorption of β rays in the material is approximately:
in the formula I0For intensity without absorbing material, I is β rays 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 records the intensity I of β radiation as it passes through the tape 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 recorded β intensity of radiation I2 as it passed through the filter paper, as given by equation (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 comprises a collector, a processor, a memory, a circuit control system and a display 503, wherein the input end of the collector is connected with the output end of the β ray receiving and measuring unit 502, the electric signal of the ray receiving and measuring unit 502 is collected β, the output end of the collector is connected with the input end of the processor, the processed measuring data is stored in the first memory through the output end of the processor, and 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 β radiation sources 501 respectively irradiate the paper tape 201 in sequence to form dust spots, and the dust spots are received by the β radiation 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, which comprises: 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, in one period, the paper tape is fixed, the air port of the air port moving unit is in the original position, the blank paper tape far away from the paper tape moving unit is closed, the air pump is closed, the detection device irradiates the surface of the detected blank paper tape, and the detected surface data is taken as detection data, the detection data is obtained by, for example, an β ray radiation source and a β ray receiving and measuring mechanism, namely, the intensity I of β ray passing through the 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 moving unit is positioned at the original position, the air pump is closed, the detection device irradiates the surface of the paper tape enriched with the atmospheric particulates, and the detected surface data is taken as detection data, for example, β ray radiation source and β ray receiving and measuring mechanism are used for obtaining the detection data, namely, the intensity I when β ray passes through the paper tape enriched with the atmospheric particulates2。
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.
The utility model discloses a monitoring mechanism of portable atmospheric particulates concentration, in predetermined period, keeps detection device's height unchangeable to through control flow control device, punishment do not detects the facula intensity of unadsorbed blank paper tape department and the facula intensity of the paper tape department of having adsorbed atmospheric particulates at the same position of paper tape, accomplishes test cycle. The detection method is sensitive and convenient to test and reliable in data.
To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has. The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may 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 (8)
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;
the detection device is connected with the driving device;
the flow control device is connected with the gas circuit;
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 4, 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,
β a radiation detection unit;
the data processing unit is connected with the β ray detection unit;
the β ray detection unit comprises a β ray radiation source positioned in the air port movement unit and a β ray receiving and measuring unit arranged opposite to the β ray radiation source, and the paper tape is placed between the β ray radiation source and the β 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, and the sampling rod is sleeved with the dynamic heating device.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112304828A (en) * | 2020-09-11 | 2021-02-02 | 安徽曼德克环境科技有限公司 | Raise dust on-line monitoring system |
| EP4019934A1 (en) * | 2020-12-23 | 2022-06-29 | Tianjin Zwinsoft Technology Co., Ltd. | Portable on-line in-situ beta-ray monitor and monitoring method |
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2019
- 2019-08-14 CN CN201921315452.3U patent/CN210953726U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112304828A (en) * | 2020-09-11 | 2021-02-02 | 安徽曼德克环境科技有限公司 | Raise dust on-line monitoring system |
| EP4019934A1 (en) * | 2020-12-23 | 2022-06-29 | Tianjin Zwinsoft Technology Co., Ltd. | Portable on-line in-situ beta-ray monitor and monitoring method |
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