CN102353564A - Individual sampler - Google Patents
Individual sampler Download PDFInfo
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- CN102353564A CN102353564A CN2011101627882A CN201110162788A CN102353564A CN 102353564 A CN102353564 A CN 102353564A CN 2011101627882 A CN2011101627882 A CN 2011101627882A CN 201110162788 A CN201110162788 A CN 201110162788A CN 102353564 A CN102353564 A CN 102353564A
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Abstract
The invention relates to an individual sampler which is an environment gas sampling apparatus, and belongs to the fields of gas monitoring and sampling in environment protection. The apparatus comprises a housing, a cell, a micro air pump, a man-machine interactive system, a system measurement and control module and a constant flow surge bin. The cell, the micro air pump, the system measurement and control module, the constant flow surge bin and a mass flow rate sensor are arranged in the housing. An air inlet end of a filter communicates with a sampling air inlet, and an air outlet of the filter communicates with an air inlet of the micro air pump; an air outlet of the micro air pump communicates with an air inlet of the constant current surge bin; an air outlet of the constant current surge bin communicates with the flow rate sensor; and an air outlet of the sensor communicates with a sampling air outlet of the individual sampler. The apparatus can realize full flow range accurate control and constant flow sampling and provide multiple intelligent sampling modes, has characteristics of low costs, small volume and size, convenience for carrying and sampling in any environment and provides convenience for various detecting mechanism; therefore, the apparatus has wide application aspects.
Description
Technical field
The present invention relates to a kind of environmental gas sampling apparatus, belong to gas-monitoring in the environmental protection, sampling field.
Background technology
Along with develop the continuous improvement with living standards of the people of science and technology with industry; The air quality problems closely bound up with people's daily life also more and more receives people's attention; Air pollution and its environmental monitoring become great in the world focus; Therefore, market is a feast for the eyes sampling thief to have occurred.
Though its related request of standard formulation is arranged between the various sampling thiefs; But because the manufacturing process of each manufacturer is different; The effect of working it out is also different; Simultaneously; Owing to adopt metering systems such as old-fashioned rotor demonstration or pressure feedback, therefore on control accuracy, can't reach more higher leveled degree of accuracy, also therefore; There is bigger measuring error in sampled result, and this just makes that environmental monitoring results is inaccurate.
And for most of sampling thiefs, its range ability or between 0～500mL/min, or between 850～5000mL/min, complete unity does not cover the full flow range.And, claim that having covered the full flow range also is to need the extra low discharge module that adds to realize in fact for its indivedual import sampling thiefs, and be the mutual switching of two kinds of range abilities, and discontinuous adjustable; Simultaneously; Because the low discharge module has been installed; The data on flows that this type sampling thief is shown on when sampling himself display is not an actual flow; Therefore require when low discharge is sampled; Must calibrate in advance, regulating the sampling thief flow is required flow, thereby the sampling operation after causing can only be calibration data as a reference; Then fully can't make judgement to the situation such as fluctuations in discharge takes place of sampling midway, this has just caused very big inconvenience to operating personnel.
In addition, traditional basic order of sampling thief internal structure all is: air intake opening → sensor → micro air pump → gas outlet; And, more omitted this step of sensor for some cheap products, therefore, be very poor on control accuracy.
And for some products that have sensor; Owing to adopted above-mentioned flow process; As a rule; Owing to passed through sampling air pump and home loop; Gas has not only produced loss, also after the sampling air pump, become pulse pneumatic, and the data on flows that sampling thief shows is the data before the gas loss; The sample that has caused being collected is very inaccurate, thereby the analytical work of subsequent experimental chamber has been caused very big error.
Summary of the invention
The objective of the invention is to overcome the defective of prior art, provide a kind of rational in infrastructure, sampling is accurate, the high personal sampler of monitoring efficient.
For solving the technical matters of above-mentioned existence, the present invention adopts following technical proposals: personal sampler comprises shell 1, battery 2, micro air pump 3, man-machine interactive system 4, system monitoring module 5, constant current surge bunker 6.
Set micro air pump 3, constant current surge bunker 6, system monitoring module 5, mass flow sensor 7, battery 2 in the shell 1.The inlet end of filtrator 10 is connected with the sampling air intake opening 8 of personal sampler; Its outlet side is connected with the inlet end of micro air pump 3; The outlet side of micro air pump 3 is connected with the inlet end of constant current surge bunker; The outlet side of constant current surge bunker 6 is connected with mass flow sensor 7, and the outlet side of mass flow sensor 7 is connected with the sampling gas outlet of personal sampler.
Shell 1 comprises air intake opening 8, gas outlet 9, belt buckle 20, tripod supported hole seat 21.The belt bayonet socket is an assistance device required when being suspended on article such as belt, can 360 ° rotates freely, and the modes of emplacement of sampling thief can come free Spin Control according to special demand; Tripod supported hole seat is the threaded hole seat, but the tripod of connecting band thread support.
Through man-machine exchange system sampling time, sampling flow are set; Be transferred in the system control module, in the microprocessor of system control module, the signal input part access flow sensor of microprocessor; The signal output part of microprocessor is connected with air pump, control personal sampler sampling flow.
The integrated mass flow sensor of this device adopts the mode of rearmounted sensor to measure, and the constant current surge bunker 6 of Pei Beiing simultaneously changing into constant gas through the pulse pneumatic behind the micro air pump 3, thereby obtains stable gas collection.Gas after transforming through constant current is carried out flow measurement through mass flow sensor, and this has improved the precision of flow measurement.
On hardware facility; It is the micro air pump 3 of 0mL/min～5000mL/min that the present invention has adopted range ability; The delivery rate of micro air pump 3 is controlled between 50mL/min～4000mL/min and adjustable continuously through set system monitoring module 5, thereby has realized the unification of full flow range.
On man-machine interactive system 4, adopted liquid crystal display, the menu interface, the mode of operation of button input conveniently can both go up manual manipulation to any user of service fast, and that the mode of operation of hommization also makes flow control get up is more convenient.
Constant current surge bunker 6 inner inlet ends are provided with retaining valve 15; Connect gas storehouse 11; The end of going out in gas storehouse 11 connects three-dimensional conduction pipe 19; The other two ends of three-dimensional conduction pipe 19 respectively with gas storehouse 12 and retaining valve 16 inlet end; The outlet side of retaining valve 16 is connected with gas storehouse 13 inlet ends; The outlet side in gas storehouse 13 is connected with the inlet end of retaining valve 17, and the outlet side of retaining valve 17 is connected with the inlet end in gas storehouse 14, and the outlet side in gas storehouse 14 is connected with mass flow sensor.
All adopt rubber elastic membrane to connect in the constant current surge bunker between the gas at different levels storehouse, it is used for the systolic air-flow and changes into steady air flow as the constant current buffer unit.Gas storehouse 14 upper bottom surfaces and bottom surface are special film bottom surfaces, and 14 inside, gas storehouse are provided with spring 18, and spring 18 two ends are connected with bottom surface with the upper bottom surface in gas storehouse 14 respectively.
Personal sampler of the present invention and prior art compare, and its beneficial effect is can realize that the full flow range is accurately controlled, the constant current sampling, and various modes intellegent sampling pattern is provided.The present invention has that cost is low, volume size is little, the convenient characteristics such as sample collection of under environment arbitrarily, carrying out that are easy to carry, and for various testing agencies provide convenience, has wide utilization prospect.
Description of drawings
Fig. 1 forms synoptic diagram for the portable personal sampler system of installing;
Fig. 2 is the preposition suction type gas circuit trend of sampling thief;
Fig. 3 is the rearmounted suction type gas circuit trend of sampling thief;
Fig. 4 is the inner structure synoptic diagram of constant current surge bunker.
The image of the air-flow when Fig. 5 does not install the constant current surge bunker for sampling thief;
Fig. 6 installs the image of the air-flow behind the constant current surge bunker for sampling thief;
Fig. 7 is the portable personal sampler back side belt buckle synoptic diagram of installing;
The image of the air-flow when Fig. 8 does not install the constant current surge bunker for sampling thief;
Fig. 9 installs the image of the air-flow behind the constant current surge bunker for sampling thief;
Figure 10 is the portable personal sampler back side belt buckle synoptic diagram of installing;
Figure 11 is the portable personal sampler bottom tripod supported hole seat of installing.
Among the figure: 1. shell; 2. battery; 3. micro air pump; 4. man-machine interactive system; 5. system monitoring module; 6. constant current surge bunker; 7. mass flow sensor; 8. sampling thief air intake opening; 9. sampling thief gas outlet; 10. filtrator; 11. gas storehouse 1; 12. gas storehouse 2; 13. gas storehouse 3; 14. gas storehouse 4; 15. retaining valve 1; 16. retaining valve 2; 17. retaining valve 3; 18. spring; 19. three-dimensional guiding siphunculus; 20. belt buckle; 21. tripod supported hole seat; 22. gas storehouse 5; Gas storehouse 6; Gas storehouse 7;
Embodiment
Below in conjunction with accompanying drawing, introduce the embodiment of the invention in detail.
The composition of personal sampler as shown in Figure 1, it comprises shell 1, battery 2, micro air pump 3, man-machine interactive system 4, system monitoring module 5, constant current surge bunker 6.
As shown in Figure 2, the preposition suction type gas circuit trend of this sampling thief: external environment → absorption utensil → sampling thief air intake opening 8 → internal ramp 10 → micro air pump 3 → constant current buffering 6 → sensor 7 → sampling thief gas outlet 9 → ambient atmosphere.As shown in Figure 3, the rearmounted suction type gas circuit trend of this sampling thief: external environment → sampling thief air intake opening 8 → internal ramp 10 → micro air pump 3 → constant current buffering 6 → sensor 7 → sampling thief gas outlet 9 → collection utensil.Wherein, all be placed in the shell 1 to each link the sampling thief gas outlet, and all adopt tracheae to connect between each link, make it to form one from the sampling thief air intake opening.
In micro air pump 3 links, said system monitoring module 5 adopts microprocessor to carry out whole process control, in order to practice thrift cost, utilizes PWM (pulse-length modulation) signal of microprocessor output to change into analog D A (digital-to-analog conversion) output through integrating circuit; Through the power supply conversion circuit analog D A control voltage is changed into the constant voltage constant current power that is used for directly changing the micro air pump flow, supply with micro air pump work.
As shown in Figure 4, this sampling thief surge bunker is by the gas storehouse, retaining valve, and film, spring is formed.Constant current surge bunker 6 inner inlet ends are provided with retaining valve 15; Connect gas storehouse 11; The end of going out in gas storehouse 11 connects three-dimensional conduction pipe 19; The other two ends of three-dimensional conduction pipe 19 respectively with gas storehouse 12 and retaining valve 16 inlet end; The outlet side of retaining valve 16 is connected with gas storehouse 13 inlet ends; The outlet side in gas storehouse 13 is connected with the inlet end of retaining valve 17, and the outlet side of retaining valve 17 is connected with the inlet end in gas storehouse 14, and the outlet side in gas storehouse 14 is connected with mass flow sensor.All adopt rubber elastic membrane to connect in the constant current surge bunker between the gas at different levels storehouse, it is used for the systolic air-flow and changes into steady air flow as the constant current buffer unit.Gas storehouse 14 upper bottom surfaces and bottom surface are special film bottom surfaces, and 14 inside, gas storehouse are provided with spring 18, and spring 18 two ends are connected with bottom surface with the upper bottom surface in gas storehouse 14 respectively.The ratio of volume is between each gas storehouse: gas storehouse 1: gas storehouse 2: gas storehouse 3: gas storehouse 4=3: 1: 2: 4.When specifically producing product; Can be according to the real work situation of personal sampler; Quantity through the gentle storehouse of reasonable arrangement retaining valve; Select the surge bunker of different stage; Level 2 buffering storehouse as shown in Figure 5; The level 2 buffering storehouse is made up of two retaining valves, three gas storehouses and a spring, and the long-pending ratio of each gas warehouse is: gas storehouse 5: gas storehouse 6: gas storehouse 7=2: 1: 3.Can also use different stage surge bunker level Four surge bunker as shown in Figure 6 and Pyatyi surge bunker shown in Figure 7.
When the constant current surge bunker was not installed, as shown in Figure 8,3 air-flows through micro air pump were air pulse.Constant current surge bunker 6 effect is through behind the micro air pump 3, and the gas that becomes pulse pneumatic because of the influence of air pump carries out constant current and transforms.Because membrane pump structure itself can constantly be done push-and-pull campaign repeatedly in the running, cause the gas of basic constant current in advance to become pulse pneumatic through behind the air pump.According to the characteristic of survey gas, construct a constant current surge bunker 6, it is the multi-buffer container structure, every grade of buffer container volume differs, and adopts the rubber elastic membrane sealing.Construct by a certain percentage according to the air pulsing characteristic, and the connection that distributes according to certain rules.Rubber elastic membrane can expand when the gas crest and heave, and the too much gas that the storage air pump is produced when promoting makes it gas flow smooth and slows down; Rubber elastic membrane can restore when the pulsation trough, and the gas of storing at crest is emitted, and the air flow recovery that the complemental air blowback is caused when drawing makes it eluting gas and is able to replenish, steady air current output; Through multi-buffer, as shown in Figure 9, final systolic air-flow changes into constant gas.
As shown in figure 10, shell 1 comprises air intake opening 8, gas outlet 9, belt buckle 20.The belt bayonet socket is connected with the sampling thief housing.The belt bayonet socket is an assistance device required when being suspended on article such as belt, can 360 ° rotates freely, and the modes of emplacement of sampling thief can come free Spin Control according to special demand.As shown in figure 11, in the sampling thief bottom tripod supported hole seat 21 being set is the threaded hole seat, but the tripod of connecting band thread support.
In the sensor link, 7 physical quantity informations flow of said high precision mass flow sensor change into electric signal, through the high accurate A sampling, are quantized into the numerical information that can be used for microprocessor (MCU) identification, supply with microprocessor (MCU) and carry out analytical calculation.Through the result of calculation of MCU, can easily must obtain FEEDBACK CONTROL amount parameter, be used for MCU micro air pump [3] is carried out closed-loop control; Simultaneously, according to demand, the present invention has introduced the integral and calculating function, and the gas of being sampled is carried out the cumulative volume integration, has made things convenient for the analytical work of subsequent experimental chamber widely.
In the whole control, the present invention adopts real time operating system as core architecture, adds the various tasks process according to the control of each module, thereby can realize optimization control.Consider various actual samples demands; The present invention has designed multiple sampling pattern on software; Like manual operations, timing sampling, repeatedly circulating sampling, any time fixed point startup sampling, quantitative volume integral sampling etc., covered the sample requirement of most applications basically; And sampling thief is reserved with the system upgrade interface, can carry out function upgrading according to specific (special) requirements, thereby has realized the comprehensive automation controlling of sampling.
Important technological parameters index of the present invention:
1. sampling flow: 50～4000sccm
2. Measurement Resolution: 1sccm
3. flow degree of accuracy:＜1%F.S
3. discharge stability:＜1%F.S
4. stream time: >=8h maximum flow/>=24h maximum flow (external battery module)
5. working environment: temperature :-5～+ 45 ℃ of humidity:＜90%
6. software function:
(1) mark condition data reduction, mass rate/volumetric flow rate conversion, sampling cumulative volume integration
(2) regularly single is sampled/repeatedly self-loopa sampling automatically
Any time self-starting sampling/many groups are provided with automatic sampling in (3) 24 hours
(4) quantitatively volume sampling
Claims (8)
1. a sampler body device has comprised shell (1), battery (2), micro air pump (3), man-machine interactive system (4), system monitoring module (5), constant current surge bunker (6), it is characterized in that micro air pump (3) set in the shell (1), constant current surge bunker (6), system monitoring module (5), mass flow sensor (7), battery (2); The inlet end of said filtrator (10) is connected with the sampling air intake opening of personal sampler; Its outlet side is connected with the inlet end of micro air pump (3); The outlet side of micro air pump (3) is connected with the inlet end of constant current surge bunker (6); The outlet side of constant current surge bunker (6) is connected with flow sensor (7), and the outlet side of sensor (10) is connected with the sampling gas outlet of personal sampler; Said constant current surge bunker (6) is connected with the gas storehouse by retaining valve, forms the constant current surge bunker of multilevel hierarchy.
2. personal sampler according to claim 1 is characterized in that said shell (1) comprises air intake opening (8), gas outlet (9), belt buckle, tripod supported hole seat; The belt bayonet socket is an assistance device required when being suspended on article such as belt, can 360 ° rotates freely, and the modes of emplacement of sampling thief can come free Spin Control according to special demand; Tripod supported hole seat is the threaded hole seat, but the tripod of connecting band thread support.
3. according to the said personal sampler of claim 1; It is characterized in that continuously adjustable membrane pump between said air pump (3) flow range is from 0mL/min to 5000mL/min, the delivery rate of micro air pump (3) is controlled between 50mL/min～4000mL/min and adjustable continuously through the system monitoring module (5) that is provided with.
4. personal sampler according to claim 1 is characterized in that said man-machine interactive system (4) is for comprising the input-output system of liquid crystal display, button input.
5. personal sampler according to claim 1; It is characterized in that system monitoring module (5) comprises: accurate flow closed-loop control module, high-precision sensor sampling feedback module, power supply conversion circuit, efficient power administration module; Through interpersonal exchange system sampling time, sampling flow are set; Be transferred in the system control module; In the microprocessor of system control module; The signal input part cut-in quality flow sensor (7) of microprocessor; The signal output part of microprocessor is connected with micro air pump (3), control personal sampler sampling flow.
6. personal sampler according to claim 1; It is characterized in that the inner inlet end of said constant current surge bunker (6) is provided with check valve (15); Connect gas storehouse (11); The outlet side in gas storehouse (11) connects three-dimensional conduction pipe (17); The other two ends of three-dimensional conduction pipe (17) respectively with gas storehouse (12) and check valve (16) inlet end; The outlet side of check valve (16) is connected with gas storehouse (13) inlet end; The outlet side in gas storehouse (13) is connected with the inlet end of check valve (17); The outlet side of check valve (17) is connected with the inlet end of gas storehouse (14); The outlet side in gas storehouse (14) is connected with mass flow sensor (7); Air pump is gone up set air inlet (8) with gas from shell (1) and is sent to constant current surge bunker (6); Mass flow sensor (7) by the gas after constant current surge bunker (6) constant current flows through in the system monitoring module (5) is measured, and delivers to the gas outlet (9) of shell (1) at last.
7. personal sampler according to claim 1; It is characterized in that constant current surge bunker (6) is a buffer container that constructs according to micro air pump output ripple stream condition; Buffer container is a multilevel hierarchy; All adopt rubber elastic membrane to connect between the gas at different levels storehouse; It is used for the systolic air-flow and changes into steady air flow as the constant current buffer unit.
8. personal sampler according to claim 1 is characterized in that described gas storehouse (14) upper bottom surface and bottom surface are rubber elastic membranes, and inside, gas storehouse (14) is provided with spring (18), and spring (18) two ends are connected with bottom surface with the upper bottom surface of gas storehouse (14) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101627882A CN102353564A (en) | 2011-06-16 | 2011-06-16 | Individual sampler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101627882A CN102353564A (en) | 2011-06-16 | 2011-06-16 | Individual sampler |
Publications (1)
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| CN102353564A true CN102353564A (en) | 2012-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101627882A Pending CN102353564A (en) | 2011-06-16 | 2011-06-16 | Individual sampler |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104216424A (en) * | 2014-08-29 | 2014-12-17 | 湖南三德科技股份有限公司 | Precise flow controller for portable equipment |
| CN106323702A (en) * | 2016-11-11 | 2017-01-11 | 江苏京典自动化科技有限公司 | Double-channel atmosphere constant flow sampler |
| CN106768086A (en) * | 2017-04-06 | 2017-05-31 | 四川理工学院 | A kind of room air detecting system |
| CN108225850A (en) * | 2016-12-21 | 2018-06-29 | 中国科学院宁波城市环境观测研究站 | A kind of intellegent sampling system and application method |
| CN108333001A (en) * | 2018-04-25 | 2018-07-27 | 上海磐合测控技术股份有限公司 | A kind of surrounding air constant current automatic sampling system and its method of sampling |
| CN109357920A (en) * | 2018-11-15 | 2019-02-19 | 深圳国技仪器有限公司 | Portable wide-range sampling environment air device |
| CN109387400A (en) * | 2017-08-09 | 2019-02-26 | 中国石油化工股份有限公司 | A kind of polymeric membrane chlorohydrocarbon personal sampler and sampled concentrations measurement method |
| CN109619772A (en) * | 2018-10-31 | 2019-04-16 | 立兆股份有限公司 | With pumping/aerification function slider of slide fastener |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104216424A (en) * | 2014-08-29 | 2014-12-17 | 湖南三德科技股份有限公司 | Precise flow controller for portable equipment |
| CN106323702A (en) * | 2016-11-11 | 2017-01-11 | 江苏京典自动化科技有限公司 | Double-channel atmosphere constant flow sampler |
| CN108225850A (en) * | 2016-12-21 | 2018-06-29 | 中国科学院宁波城市环境观测研究站 | A kind of intellegent sampling system and application method |
| CN106768086A (en) * | 2017-04-06 | 2017-05-31 | 四川理工学院 | A kind of room air detecting system |
| CN109387400A (en) * | 2017-08-09 | 2019-02-26 | 中国石油化工股份有限公司 | A kind of polymeric membrane chlorohydrocarbon personal sampler and sampled concentrations measurement method |
| CN108333001A (en) * | 2018-04-25 | 2018-07-27 | 上海磐合测控技术股份有限公司 | A kind of surrounding air constant current automatic sampling system and its method of sampling |
| CN109619772A (en) * | 2018-10-31 | 2019-04-16 | 立兆股份有限公司 | With pumping/aerification function slider of slide fastener |
| CN109619772B (en) * | 2018-10-31 | 2021-10-08 | 立兆股份有限公司 | Zipper piece with air pumping/inflating function |
| CN109357920A (en) * | 2018-11-15 | 2019-02-19 | 深圳国技仪器有限公司 | Portable wide-range sampling environment air device |
| CN109357920B (en) * | 2018-11-15 | 2024-03-22 | 深圳国技仪器有限公司 | Portable wide-range ambient air sampler |
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Application publication date: 20120215 |