CN209745761U - Particulate matter sampling weighing device and particulate matter mass concentration automatic determination system - Google Patents
Particulate matter sampling weighing device and particulate matter mass concentration automatic determination system Download PDFInfo
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- CN209745761U CN209745761U CN201920356868.3U CN201920356868U CN209745761U CN 209745761 U CN209745761 U CN 209745761U CN 201920356868 U CN201920356868 U CN 201920356868U CN 209745761 U CN209745761 U CN 209745761U
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Abstract
The utility model belongs to the technical field of the empty gas detection surveys. A particulate matter sampling and weighing device comprises a box body, a membrane disc, a gas collecting unit, a transfer unit and a weighing unit; a plurality of membrane clamps are circumferentially distributed on the membrane disc, and a filter membrane is placed on each membrane clamp in a matching manner; the gas collecting unit is arranged corresponding to the membrane disc; the transfer unit realizes the transfer of the filter membrane between the membrane disc and the weighing unit. Also discloses an automatic measuring system for the mass concentration of the particulate matters. The utility model discloses have functions such as constant temperature, constant humidity, static-removing, take precautions against earthquakes, filter membrane code automatic identification, whole process is accomplished by computer control in thousand grades of cleanliness factor operation storehouses automatically, can also avoid the maloperation and the data statistics mistake that the manual work caused, has avoided the tedious work of laboratory staff, has guaranteed the reliability and the accuracy nature of weighing data.
Description
Technical Field
the utility model belongs to the technical field of the empty gas detection surveys, concretely relates to particulate matter sampling weighing device and particulate matter mass concentration automatic determination system.
Background
With the development of economy in China, the atmospheric pollution is more and more serious. Respiratory particles, respiratory dust PM10 and fine dust PM2.5, are inhaled by people and accumulated in the respiratory system, and a plurality of diseases are caused. The coarse particles can attack the respiratory system and induce asthma. The fine particles may cause heart disease, lung disease, respiratory disease, decrease lung function, etc. The finer particles are more harmful to human bodies, and even can enter alveoli and blood, so that the life can be seriously threatened. The PM2.5 also has strong adsorption capacity, is a carrier and a catalyst of various pollutants, can be an aggregate of various pollutants, and is the chief culprit of various diseases. The environment protection work is highly emphasized in China, specific contents of environment monitoring are definitely specified along with the release and implementation of HJ618-2011 ' measuring standards of environmental air PM10 and PM2.5 ' and ' twelve five ' plans of national environment monitoring ', the specific contents comprise air monitoring, water environment monitoring, soil monitoring and the like, wherein the monitoring of fine dust PM2.5 particles in the air monitoring is the important importance of the work.
The filter membrane weighing method is the earliest method for measuring the concentration of the particulate matters, has the characteristics of simple basic principle and high sampling rate compared with an automatic monitoring method (a light scattering method, an oscillation balance method, a beta ray absorption method and a piezoelectric crystal method), and is not influenced by physical properties such as the shape, the size, the color and the like of the particulate matters. Sampling at a specified flow rate, trapping particulate matters in the air on a high-performance filter membrane, weighing the mass of the filter membrane before and after sampling, calculating the mass of the trapped dust particulate matters according to the mass difference, and obtaining the ratio of the mass to the sampling volume as the mass concentration of the dust. In order to obtain accurate and reliable monitoring data and data, the sampling filter membrane needs to be constant in weight in a constant temperature and humidity box, and the influence of environmental conditions such as temperature, humidity and the like on the measurement result is eliminated.
Therefore, aiming at the problems that in the process of collecting and weighing the particles of the filter membrane, how to eliminate environmental errors and realize automation and batch operation are particularly important, and how to reasonably regulate and control the turnover among all component units is the technical problem to be solved by the application.
Disclosure of Invention
The utility model aims at the problem that above-mentioned exists with not enough, provide a structural design is reasonable, stability is good, can improve the particulate matter sampling weighing device and the particulate matter mass concentration automatic determination system of degree of automation and detected data's accuracy greatly.
In order to achieve the purpose, the adopted technical scheme is as follows:
a particulate matter sampling and weighing device, comprising: a box body; the membrane disc is rotatably arranged in the box body, a plurality of membrane clamps are circumferentially distributed on the membrane disc, and a filter membrane is placed on each membrane clamp in a matched mode; the gas collecting unit is arranged in the box body and corresponds to the membrane disc; at least one membrane clamp is correspondingly arranged in the gas acquisition unit, and the filter membrane of the corresponding station is positioned between the gas inlet and the gas outlet of the gas acquisition unit, so that the filtering and acquisition of gas particles are realized; the weighing unit is arranged in the box body and is used for weighing the filter membrane; and a transfer unit that effects transfer of a filter membrane between the membrane tray and the weighing unit.
the weighing device is characterized by also comprising a housing corresponding to the weighing unit, and a lifting unit for driving the housing is arranged in the box body; the lifting unit comprises a first bracket and a lifting power push rod arranged between the first bracket and the housing; or the lifting unit comprises a first support, a screw rod and a first sliding rail which are arranged on the first support, and a first motor for driving the screw rod to rotate, wherein a supporting rod is arranged at the top of the housing, and a nut matched with the screw rod and a sliding block matched with the first sliding rail are arranged at the end part of the supporting rod.
The filter membrane static electricity eliminating device is characterized by further comprising a code reader and static electricity eliminating rods, identification codes are arranged on the filter membranes, the weighing unit is a balance, a shock absorption seat is arranged at the bottom of the balance, and the box body is a constant temperature and humidity box.
the transfer unit includes: a guide seat; the vertical rod is arranged in the guide seat in a matched mode, the vertical rod can perform lifting action and rotating action relative to the guide seat, a transfer arm is arranged at the top of the vertical rod, and a supporting ring is arranged at the end of the transfer arm; the lower bracket is fixedly connected with the guide seat, and a second sliding rail is arranged on the lower bracket; the sliding frame is arranged on the second sliding rail in a matched sliding mode, a second motor is arranged on the sliding frame, and the lower end portion of the vertical rod is in transmission connection with the second motor; and the lifting power push rod drives the sliding frame to lift relative to the guide seat.
The membrane separation device is characterized in that a rotating shaft is arranged between the membrane disc and the box body, a third motor for driving the rotating shaft to rotate is arranged on the box body, a supporting and conveying opening is formed in the middle of the membrane clamp, and the supporting ring is jacked through the supporting and conveying opening to separate the filter membrane from the membrane disc.
The gas collection unit includes: the upper support is provided with a top cover and an air inlet; the lifting platform is arranged on the supporting column in a sliding manner, and corresponds to the corresponding supporting and conveying port; the driving part drives the lifting platform to move up and down on the supporting column; the middle part of the lifting platform is provided with a sinking groove, the bottom or the side part of the sinking groove is provided with an air outlet, and the filter membrane is hermetically pressed between the lifting platform and the top cover through jacking of the lifting platform.
The driving part is a lifting power push rod; or the driving part comprises a swing rod, the middle part of the swing rod is hinged to the lower support, one end of the swing rod corresponds to the bottom of the lifting platform, a cam and a fourth motor for driving the cam to rotate are arranged on the lower support corresponding to the other end of the swing rod, and the cam acts to drive the swing rod to swing.
An automatic particulate matter mass concentration determination system comprising: the sampling cutting device comprises a sampling head and a cutter; according to the particulate matter sampling and weighing device, the air inlet of the air collecting unit is communicated with the air outlet end of the cutter; the flow detection and processing device comprises a flowmeter, an air pump and a filter which are sequentially communicated through an air conveying pipeline, wherein the air inlet end of the flowmeter is communicated with the air outlet of the air collection unit; and the controller controls the actions of all parts and records the weighing numerical value of the filter membrane and the numerical value of the flowmeter.
By adopting the technical scheme, the beneficial effects are as follows:
The utility model has the advantages of reasonable design, it can realize sampling, shifting, weighing in a stable environment to this application can realize automatic operation. The device has the functions of constant temperature, constant humidity, static electricity removal, shock prevention, automatic filter membrane coding identification and the like. The whole process is automatically finished in the thousand-level cleanliness operation bin under the control of a computer, misoperation and data statistics errors caused by manual work can be avoided, heavy labor of laboratory personnel is avoided, and reliability and accuracy of weighing data are guaranteed.
the instrument of the application is specialized relatively, the instrument and stable operation are reliable, the instrument is designed in a standardized way, the whole cabinet is provided, and the dead weight of the instrument is larger than 300 kg. The quantity of single constant weight is greatly increased, 150 filter membranes can simultaneously have constant weight, and 60 ultralow-emission sampling heads are arranged. The constant temperature device of the instrument adopts a special mute air conditioning unit, the influence of noise on the working environment of people is greatly reduced, and the constant humidity device adopts a specialized unit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly described below. The drawings are intended to depict only some embodiments of the invention, and not all embodiments of the invention are limited thereto.
Fig. 1 is according to the utility model discloses particulate matter sampling weighing device's structure schematic diagram.
fig. 2 is a schematic structural view of a balance and a housing according to an embodiment of the present invention.
fig. 3 is a schematic structural diagram of a balance, a transfer unit, a code reader and an electrostatic elimination bar according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a membrane disc and a transfer unit according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a gas collection unit according to an embodiment of the present invention.
fig. 6 is a schematic structural diagram between the gas collecting unit and the membrane disc according to the embodiment of the present invention.
Fig. 7 is a schematic structural diagram of an automatic determining system for mass concentration of particulate matter according to an embodiment of the present invention.
number in the figure:
10 is a particulate matter sampling and weighing device, 20 is a sampling and cutting device, 21 is a sampling head, 22 is a cutter and 30 is a flow detection and processing device;
100 is a box body, 101 is a supporting plate;
200 is a film disc, 201 is a film clamp, 202 is a supporting and conveying port, 203 is a rotating shaft, and 204 is a third motor;
300 is a gas collecting unit, 301 is an upper support, 302 is a lower support, 303 is a top cover, 304 is a gas inlet, 305 is a support column, 306 is a lifting table, 307 is a sinking groove, 308 is a gas outlet, 309 is a swing rod, 310 is a cam, 311 is a fourth motor;
400 is a weighing unit, 401 is a shock absorption seat, 402 is a housing, 403 is a first bracket, 404 is a lead screw, 405 is a first slide rail, 406 is a first motor, 407 is a support rod, and 408 is a filter membrane seat;
500 is a transfer unit, 501 is a guide seat, 502 is a lower bracket, 503 is a vertical rod, 504 is a transfer arm, 505 is a supporting ring, 506 is a second slide rail, 507 is a sliding frame, 508 is a second motor and 509 is a lifting power push rod;
610 is a code reader, 620 is an electrostatic elimination rod;
700 is a filter membrane.
Detailed Description
In order to make the purpose, technical features and technical effects of the technical solution of the present invention clearer, the drawings of the embodiments of the present invention are combined together, and the example solution of the embodiments of the present invention is clearly and completely described.
referring to fig. 1-6, the utility model relates to a particulate matter sampling weighing device, including box 100, membrane disc 200, gas collection unit 300, weighing unit 400 and transfer unit 500, in this embodiment box 100 is a constant temperature and humidity box, specifically it can be through setting up air filter equipment and purifying the air in the filter box, set up air circulation system, make temperature and humidity in the whole box reach the effect of evenly distributed, set up constant temperature unit and constant humidity unit and heat or refrigerate, humidify or dehumidify the air etc.; further, a supporting plate 101 made of marble is disposed at the middle of the case 100, and the respective components are disposed on the supporting plate 101.
specifically, the transfer unit 500 in this embodiment includes a guide seat 501, an upright 503 disposed in the guide seat in a matching manner, a lower bracket 502 disposed at the lower portion of the support plate, a sliding frame 507 and a lifting power push rod 509, the sliding frame is slidably disposed on a second slide rail in a matching manner, the upright can perform lifting and rotating actions with respect to the guide seat, a transfer arm is disposed at the top of the upright, and a support ring 505 is disposed at an end of the transfer arm; the lower bracket is fixedly connected with the guide seat, and a second slide rail 506 is arranged on the lower bracket; a second motor 508 is arranged on the sliding frame 507, and the lower end part of the upright rod is in transmission connection with the second motor 508; the lifting power push rod 509 drives the sliding frame to lift relative to the guide seat 501, the structure of the supporting ring at the position is a structure which is convenient for realizing the transfer and support of the filter membrane, and the structure of other supporting modes, clamping modes or adsorption modes can be adopted to realize the transfer of the filter membrane instead of the supporting ring.
To further illustrate the connection of the ring 505 to other structures, the ring 505 is provided with a notch that can facilitate engagement with the filter membrane holder 408 of the weighing cell.
Regarding the filter membrane seat 408, the weighing unit in this embodiment is a balance, and is a one hundred thousand precision balance, a shock absorbing seat 401 is disposed at the bottom of the balance, and it includes a supporting upright and a supporting platform located at the top for facilitating the placement and the lifting of the filter membrane 700 on the weighing unit, when the filter membrane is placed on the filter membrane seat by the transfer unit, the gap corresponds to the supporting upright, so that the supporting ring 505 is concentric with the filter membrane seat, at this time, the supporting ring 505 is driven to descend, the filter membrane is placed on the filter membrane seat, when the supporting is needed, the opposite method is adopted, and the weighing unit is also disposed on the supporting plate in the box body, so as to realize the weighing of the filter membrane; the transfer unit effects transfer of the filter membrane between the membrane tray 200 and the weighing unit 400.
The membrane disc 200 is arranged in the box 100 in a rotating mode, a plurality of membrane clamps 201 are circumferentially distributed on the membrane disc 200, namely a plurality of positioning columns are arranged in a certain circumferential area, so that a membrane clamp is formed in a certain circumferential area in a surrounding mode, a membrane clamp structure is formed through three positioning columns in the embodiment, and in addition, an independent supporting table can be arranged to serve as the membrane clamp. Filter membrane 700 has been placed in the matching on each membrane clamp 201, wherein is provided with pivot 203 between membrane dish 200 and the backup pad 101, and is provided with the rotatory third motor 204 of drive pivot 203 on the backup pad 101, and membrane clamp 201 middle part is provided with holds in the palm and send a mouthful 202, and the filler ring is sent mouthful 202 jacking filter membrane 700 through holding in the palm and is break away from membrane dish 200 to make the structure of filler ring in this embodiment can be applicable to membrane dish and filter membrane seat. The drawings of this embodiment also show another filter membrane holder 408 of similar construction to the membrane clips of the membrane discs, which when used does not require a notch arrangement.
In order to further avoid the influence of factors such as air flow and the like in the weighing process, a housing 402 corresponding to the weighing unit is further arranged in the embodiment, a shock absorption seat 401 is further arranged at the lower part of the heavy unit, and a lifting unit for driving the housing 402 is arranged in the box body 100; the lifting unit comprises a first bracket and a lifting power push rod arranged between the first bracket and the housing; or the lifting unit comprises a first bracket 403, a lead screw 404 and a first slide rail 405 which are arranged on the first bracket, and a first motor 406 which drives the lead screw to rotate, a support rod 407 is arranged at the top of the housing, and a nut matched with the lead screw and a slide block matched with the first slide rail 405 are arranged at the end part of the support rod 407.
the gas collecting unit 300 in this embodiment is also disposed on the supporting plate 101 of the box 100 and is disposed corresponding to the membrane disc 200; at least one membrane clamp 201 is correspondingly arranged in the gas acquisition unit 300, and the filter membrane of the corresponding station is positioned between the gas inlet and the gas outlet of the gas acquisition unit, so that the filtering and acquisition of gas particles are realized.
still including code reader and electrostatic elimination stick, be provided with the identification code on each filter membrane, its position of arranging is on the orbit that the transfer unit shifts in-process filter membrane and marchs, and it all corresponds from top to bottom with the filter membrane, discerns through code reader to the weighing data of the corresponding filter membrane of record, electrostatic elimination stick can be to its static elimination simultaneously, avoids causing the influence to entire system.
The gas collection unit comprises an upper support 301 and a lower support 302, and a top cover 303 and a gas inlet 304 are arranged on the upper support 301; a support column 305 is arranged on the lower support 302, a lifting platform 306 is arranged on the support column 305 in a sliding manner, and the lifting platform 306 corresponds to the corresponding delivery port 202; the lower support 302 is provided with a driving part for driving the lifting platform 306 to move up and down on the supporting column 305, the middle part of the lifting platform 306 is provided with a sinking groove 307, the bottom or the side part of the sinking groove is provided with an air outlet 308, and the filter membrane 700 is hermetically pressed between the lifting platform 306 and the top cover 303 through the jacking of the lifting platform 306.
the specific driving structure can be a lifting power push rod; in this embodiment, the following are adopted: the driving part comprises a swing rod 309, the middle part of the swing rod 309 is hinged to the lower support, one end of the swing rod 309 corresponds to the bottom of the lifting platform 306, a cam 310 and a fourth motor 311 for driving the cam 310 to rotate are arranged on the lower support 302 corresponding to the other end of the swing rod 309, the cam 310 moves to drive the swing rod 309 to swing, and in order to facilitate the movement of the cam and the swing rod, a roller is arranged at the end part of the swing rod, so that sliding friction, displacement and rolling friction between the cam and the swing rod are achieved.
as shown in the figure, can also set up the lower plate in the embodiment in the elevating platform lower part, and the lower plate passes through threaded connection on the elevating platform to be convenient for height-adjusting, realize the adjustment to the effort of filter membrane between elevating platform and the top cap, can also set up the spring, thereby improve the equilibrium of effort, and have locking effect and set up the recess on the top cap, make it realize labyrinth seal structure with the filter membrane, improve sealed effect, avoid the air current to spill over.
Referring to fig. 7, an automatic measuring system for mass concentration of particulate matter comprises a sampling and cutting device 20, the particulate matter sampling and weighing device 10, a flow detecting and processing device 30 and a controller, wherein the sampling and cutting device comprises a sampling head 21 and a cutter 22; the air inlet of the air collection unit 300 is communicated with the air outlet end of the cutter 22; the flow detection and processing device 30 comprises a flowmeter, an air pump and a filter which are sequentially communicated through a gas transmission pipeline, and the gas inlet end of the flowmeter is communicated with the gas outlet of the gas collection unit; the controller controls the action of each part and records the weighing value of the filter membrane and the value of the flowmeter. The cutting head can be PM10 or PM2.5, and the sampling head can be provided with a heat exchange jacket on the outer side, so that air is cooled or heated, and the accuracy of detection data is improved.
In the working process, air is extracted through the action of the air extracting pump, air is sucked through the sampling head, particulate matters with the particle size of PM10 or PM2.5 are cut by the cutter, the sampled particulate matters are filtered on the filter membrane, the sampling and collection of the particulate matters are realized, the volume of the airflow is obtained through the flow meter, the airflow is finally discharged through the air outlet of the air extracting pump, and the filtering of the filter is needed to avoid polluting the air. For the filter membrane, snatch through the transfer unit, sweep the sign indicating number, destatic the back, transfer to the balance on, the housing descends, weighs, the record reading of weighing to put back the relevant position of membrane dish again by the transfer unit, can obtain this measured test data from this. The automatic continuous monitoring and measuring operation can be realized through the rotation of the membrane disc until the measurement of all the filter membranes on the membrane disc is finished.
the embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts in the embodiments are referred to each other.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of this application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Exemplary embodiments of the present invention have been described in detail with reference to the preferred embodiments, however, it will be understood by those skilled in the art that various modifications and changes may be made to the above specific embodiments without departing from the scope of the present invention, and various combinations of the technical features and structures of the present invention may be implemented without departing from the scope of the present invention, which is defined by the appended claims.
Claims (8)
1. a particulate matter sampling weighing device, characterized in that includes:
A box body;
the membrane disc is rotatably arranged in the box body, a plurality of membrane clamps are circumferentially distributed on the membrane disc, and a filter membrane is placed on each membrane clamp in a matched mode;
The gas collecting unit is arranged in the box body and corresponds to the membrane disc; at least one membrane clamp is correspondingly arranged in the gas acquisition unit, and the filter membrane of the corresponding station is positioned between the gas inlet and the gas outlet of the gas acquisition unit, so that the filtering and acquisition of gas particles are realized;
the weighing unit is arranged in the box body and is used for weighing the filter membrane; and
A transfer unit that effects transfer of a filter membrane between the membrane tray and the weighing unit.
2. The particulate matter sampling and weighing device of claim 1, further comprising a housing corresponding to the weighing unit, wherein a lifting unit for driving the housing is arranged in the housing;
the lifting unit comprises a first bracket and a lifting power push rod arranged between the first bracket and the housing;
Or the lifting unit comprises a first support, a screw rod and a first sliding rail which are arranged on the first support, and a first motor for driving the screw rod to rotate, wherein a supporting rod is arranged at the top of the housing, and a nut matched with the screw rod and a sliding block matched with the first sliding rail are arranged at the end part of the supporting rod.
3. The particulate matter sampling and weighing device of claim 1, further comprising a code reader and an electrostatic elimination bar, wherein an identification code is arranged on each filter membrane, the weighing unit is a balance, a shock absorption seat is arranged at the bottom of the balance, and the box body is a constant temperature and humidity box.
4. The particulate matter sampling weighing device of claim 1, wherein the transfer unit comprises:
a guide seat;
The vertical rod is arranged in the guide seat in a matched mode, the vertical rod can perform lifting action and rotating action relative to the guide seat, a transfer arm is arranged at the top of the vertical rod, and a supporting ring is arranged at the end of the transfer arm;
The lower bracket is fixedly connected with the guide seat, and a second sliding rail is arranged on the lower bracket;
the sliding frame is arranged on the second sliding rail in a matched sliding mode, a second motor is arranged on the sliding frame, and the lower end portion of the vertical rod is in transmission connection with the second motor; and
And the lifting power push rod drives the sliding frame to lift relative to the guide seat.
5. the particulate matter sampling and weighing device of claim 4, wherein a rotating shaft is arranged between the membrane disc and the box body, a third motor for driving the rotating shaft to rotate is arranged on the box body, a supporting and feeding opening is arranged in the middle of the membrane clamp, and the supporting ring jacks the filter membrane to separate from the membrane disc through the supporting and feeding opening.
6. The particulate matter sampling weighing device of claim 5, wherein the gas collection unit comprises:
The upper support is provided with a top cover and an air inlet;
The lifting platform is arranged on the supporting column in a sliding manner, and corresponds to the corresponding supporting and conveying port; and
A driving part for driving the lifting platform to move up and down on the supporting column;
The middle part of the lifting platform is provided with a sinking groove, the bottom or the side part of the sinking groove is provided with an air outlet, and the filter membrane is hermetically pressed between the lifting platform and the top cover through jacking of the lifting platform.
7. the particulate matter sampling and weighing device of claim 6, wherein the driving part is a lifting power push rod; or the driving part comprises a swing rod, the middle part of the swing rod is hinged to the lower support, one end of the swing rod corresponds to the bottom of the lifting platform, a cam and a fourth motor for driving the cam to rotate are arranged on the lower support corresponding to the other end of the swing rod, and the cam acts to drive the swing rod to swing.
8. an automatic measuring system for mass concentration of particulate matter, comprising:
the sampling cutting device comprises a sampling head and a cutter;
The particulate matter sampling and weighing device of any one of claims 1 to 7, wherein the gas inlet of the gas collection unit is communicated with the gas outlet end of the cutter;
the flow detection and processing device comprises a flowmeter, an air pump and a filter which are sequentially communicated through an air conveying pipeline, wherein the air inlet end of the flowmeter is communicated with the air outlet of the air collection unit; and
And the controller controls the actions of all parts and records the weighing value of the filter membrane and the value of the flowmeter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920356868.3U CN209745761U (en) | 2019-03-20 | 2019-03-20 | Particulate matter sampling weighing device and particulate matter mass concentration automatic determination system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920356868.3U CN209745761U (en) | 2019-03-20 | 2019-03-20 | Particulate matter sampling weighing device and particulate matter mass concentration automatic determination system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870395A (en) * | 2019-03-20 | 2019-06-11 | 河南省计量科学研究院 | Uncertainty analysis method based on the automatic weighing measurement particulate in air concentration of filter membrane |
| CN111398082A (en) * | 2020-04-22 | 2020-07-10 | 山东科技大学 | Real-time monitoring device and method for content of free silica in industrial and mining dust |
| CN114047091A (en) * | 2021-11-15 | 2022-02-15 | 山东大学 | Constant temperature and humidity box with automatic weighing function |
-
2019
- 2019-03-20 CN CN201920356868.3U patent/CN209745761U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870395A (en) * | 2019-03-20 | 2019-06-11 | 河南省计量科学研究院 | Uncertainty analysis method based on the automatic weighing measurement particulate in air concentration of filter membrane |
| CN111398082A (en) * | 2020-04-22 | 2020-07-10 | 山东科技大学 | Real-time monitoring device and method for content of free silica in industrial and mining dust |
| CN114047091A (en) * | 2021-11-15 | 2022-02-15 | 山东大学 | Constant temperature and humidity box with automatic weighing function |
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