CN103480197B - Intelligent detector for working state of filter membrane of fully-automatic filter device for environmental water sample - Google Patents
Intelligent detector for working state of filter membrane of fully-automatic filter device for environmental water sample Download PDFInfo
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- CN103480197B CN103480197B CN201310473494.0A CN201310473494A CN103480197B CN 103480197 B CN103480197 B CN 103480197B CN 201310473494 A CN201310473494 A CN 201310473494A CN 103480197 B CN103480197 B CN 103480197B
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Abstract
The invention discloses an intelligent detector for a working state of a filter membrane of a fully-automatic filter device for an environmental water sample. The intelligent detector comprises a flexible pipe flow detector, a rotor plate and a stator plate, wherein the stator plate and the rotor plate form a variable capacitor, the movement of the rotor plate is converted into a change of the capacitor, and further, the change of the capacitor is detected by a detection circuit of the variable capacitor so that the flow of a water delivery flexible pipe at the rear section can be judged, thus whether the filter membrane is blocked is indirectly judged.
Description
Technical field
The present invention relates to environmental water sample to detect, relate to environmental water sample automatic filtering apparatus further, specifically environmental water sample automatic filtering apparatus filter membrane duty intelligent detector.
Background technology
Current, the environment waters such as China's rivers, lake, coastal waters pollute very serious, have had a strong impact on the quality of life of the people, the sustainable development of restriction China economic society.Real-Time Monitoring carries out to environment water pollution condition very urgent.
The inorganic salts that nitrate-nitrogen in environment water, nitrite-nitrogen, ammonium nitrogen and phosphate etc. are easily absorbed by plants are commonly referred to nutritive salt.Monitoring is surveyed to environment water Middle nutrition salt, first will gather the water sample of environment water, then nitrogen and phosphorous nutrient in environmental water sample be measured.Due to the needs of chemical reaction, to determined water sample through 0.45 μm of membrane filtration, just subsequent chemical reaction need can be carried out.Realize the Real-Time Monitoring of water sample, just must realize the automatic fitration to environmental water sample.And China's water pollution is quite serious, containing a large amount of particle quality in water body, filter membrane is easy to blocked, therefore must detect in real time the duty of filter membrane, and the master controller by standard interface testing result uploaded in time in master board, so that master controller controls automatic filtering apparatus each several part workflow in real time, ensure that whole system works in order.
Summary of the invention
Due to the needs of analytical chemistry, whole automatic filtering unit can not contact with the material that metal etc. affects chemical analysis results, so filter membrane duty intelligent detector is exactly a non-contact high-sensitivity flowmeter in essence, indirectly judge whether filter membrane blocks by flow.
The object of this invention is to provide a kind of environmental water sample automatic filtering apparatus filter membrane duty intelligent detector.
Environmental water sample automatic filtering apparatus filter membrane duty intelligent detector, is characterized in that being made up of flexible pipe flow detector, moving plate and stator three parts;
Described flexible pipe flow detector comprises flow detector fixed mount and flow detector travelling carriage, flow detector fixed mount is fixed on shell, arranging can the sliding tray that slides wherein of transportation flux detector travelling carriage, and arranges the through hole passed through for flexible pipe with sliding tray square crossing; Flow detector travelling carriage front portion arranges the through hole being used for flexible pipe and passing through, and rear portion is connected with moving plate support;
Described moving plate is fixed on moving plate support, and described stator is fixed on stator support, and stator support is fixed on shell, arranges spring between moving plate support and stator support, and moving plate is equal with the quantity of stator, has insulating paper to isolate between moving plate and stator.
Wherein, moving plate is two groups, and the sheet number of moving plate, for often to organize 2 ~ 8, forms two groups of moving plate pole plate groups; The group number of stator and often to organize the sheet number of stator identical with moving plate, forms two groups of stator pole plate groups, and the moving plate in the stator in stator pole plate group and moving plate pole plate group interts between two to be settled.
And two groups of moving plate pole plate groups are arranged on the upper and lower symmetric position of moving plate support, moving plate pole plate group and lower moving plate pole plate group in formation, two groups of stator pole plate groups are arranged on the upper and lower symmetric position of stator support, form the upper stator pole plate group corresponding with moving plate pole plate group and lower stator pole plate group.
In the present invention, the number of springs be placed between moving plate support and stator support is 1 ~ 4, and spring anchorage bracket for placing spring is set, the length be shorter in length than when spring ejects state of spring anchorage bracket, and the distance of sliding when their difference is greater than the work of flow detector travelling carriage.
The rear portion of flow detector travelling carriage is connected to moving plate mid-stent, and spring is arranged on the position of corresponding flow detector travelling carriage.
Moving plate is positioned on stator, and the insulating paper between moving plate and stator is fixed under moving plate, and moves together with moving plate.Also the insulating paper between moving plate and stator can be fixed on stator.Such insulating paper does not just move.Certainly, moving plate also can be positioned under stator.
As a complete device, environmental water sample automatic filtering apparatus filter membrane duty intelligent detector of the present invention also must be connected in relevant circuit, just can carry out work.In the present invention, it is testing circuit moving plate and stator being electrically connected to variable capacitance.
Flexible pipe flow detector comprises flow detector fixed mount and flow detector travelling carriage, the through hole passed through for flexible pipe of flow detector fixed mount, is circular hole, semicircle or U-shaped breach; The through hole passed through for flexible pipe of flow detector travelling carriage is circular hole, semicircle or U-shaped breach.
Moving plate in upper and lower moving plate pole plate group and upper and lower stator pole plate group and stator intert mutually between two to be installed, and is isolated between each pole plate by insulating paper.Say that upper and lower moving plate pole plate group and upper and lower stator pole plate group are the pole plates of electric capacity from essence, so upper and lower moving plate pole plate group and upper and lower stator pole plate group just constitute the capacitor of a volume-variable.
Be provided with spring between moving plate support and stator fixed support, spring promotes moving plate support, and moving plate support promotes again flow detector travelling carriage and slides to flow detector fixed mount direction.
When blocking due to filter membrane, time in back segment delivery hose without water sample (or hydraulic pressure reduces in flexible pipe), moving plate pole plate group moves to flow detector fixed mount direction up and down under the action of the spring, and the relative area between moving plate group and stator group reduces, and capacitance reduces.When filter membrane blocking is unimpeded, water sample is had to flow (in flexible pipe, hydraulic pressure increases) in back segment delivery hose, move to stator fixed support direction at the flows by action amount detector travelling carriage of hydraulic pressure, upper and lower moving plate pole plate group is also moved to stator fixed support direction, thus the relative area between moving plate group and stator group is increased, capacitance increases.
So, environmental water sample automatic filtering apparatus filter membrane duty intelligent detector of the present invention, be actually the change movement of flow detector travelling carriage being converted to electric capacity, and then the change of electric capacity is detected by the testing circuit of variable capacitance, just can judge the streamflow of back segment delivery hose, thus indirectly judge whether filter membrane blocks.
Accompanying drawing explanation
Fig. 1 is filter membrane duty intelligent detector structural representation;
Fig. 2 is that flow detector fixed mount and flow detector travelling carriage coordinate schematic diagram;
Fig. 3 is moving plate support and moving plate pole plate group structural representation;
Fig. 4 is stator support and stator pole plate group structural representation;
Fig. 5 is the testing circuit schematic diagram of capacitance variations;
Fig. 6 is filter membrane duty intelligent detector application installation diagram.
Figure comprises: flexible pipe flow detector 1, flow detector travelling carriage 2, moving plate support 3, upper moving plate pole plate group 4, upper insulating paper group 5, upper stator pole plate group 6, spring anchorage bracket 7, spring is to 8, stator support 9, lower stator pole plate group 10, lower insulating paper group 11, lower moving plate pole plate group 12, shell 13, back segment delivery hose 14, fixing hole 15, flow detector fixed mount 16, sine wave source 20, variable capacitance 21, signal conditioning circuit 22, phase sensitive detection circuit 23, small signal amplifier 24, detecting circuit 25, low-pass filter circuit 26, resistance 27, microcontroller 28, digital signal line 29, CAN interface circuit 30, bus connection wire 31, filter membrane duty intelligent detector 41, back segment delivery hose 42, water sample container 43 after filtering, water sample 44 after filtering, top cone 45, filter membrane 46, bottom cone 47, water sample 48 to be filtered, , water sample container 49 to be filtered, leading portion delivery hose 50, peristaltic pump 51, CAN interface I 52, master board 53, bus connection wire 54, CAN interface II 55.
Detailed description of the invention
Embodiment 1
See Fig. 1.Environmental water sample automatic filtering apparatus filter membrane duty intelligent detector, is made up of flexible pipe flow detector 1, moving plate (comprising upper moving plate pole plate group 4 and lower moving plate pole plate group 12) and stator (comprising upper stator pole plate group 6 and lower stator pole plate group 10) three parts;
Described flexible pipe flow detector 1 comprises flow detector fixed mount 16 and flow detector travelling carriage 2, flow detector fixed mount 16 by accessing securing member and being fixed on shell 13 in fixing hole 15, arranging can the sliding tray that slides wherein of transportation flux detector travelling carriage 2, and arranges the through hole passed through for flexible pipe (back segment delivery hose 14) with sliding tray square crossing; Flow detector travelling carriage 2 front portion arranges the through hole being used for flexible pipe (back segment delivery hose 14) and passing through, and rear portion is connected with moving plate support 3.
Two groups of moving plate pole plate groups are arranged on moving plate support about 3 symmetric position (see Fig. 3), moving plate pole plate group 4 and lower moving plate pole plate group 12 in formation, two groups of stator pole plate groups are arranged on stator support about 9 symmetric position (see Fig. 4), form the upper stator pole plate group 6 corresponding with moving plate pole plate group and lower stator pole plate group 10.In upper moving plate pole plate group 4 and lower moving plate pole plate group 12, the sheet number of moving plate is often organize 4, and in upper stator pole plate group 6 and lower stator pole plate group 10, the sheet number of stator is also often organize 4, and the stator in stator pole plate group and the moving plate in moving plate pole plate group are interspersed between two to be settled.
The moving plate of upper moving plate pole plate group 4 and upper stator pole plate group 6 and stator are kept apart by 4 insulating papers in upper insulating paper group 5 respectively between two, and the moving plate of lower moving plate pole plate group 4 and lower stator pole plate group 6 and stator are kept apart by 4 insulating papers of lower insulating paper group 11 respectively between two.
Moving plate is positioned on stator, and the insulating paper between moving plate and stator is fixed under moving plate, and moves together with moving plate.
Stator support 9 is fixed on shell 13, spring 8 is set between moving plate support 3 and stator support 8, spring 8 quantity is 2, and the spring anchorage bracket 7 arranged for placing spring 8, the length be shorter in length than when spring 8 ejects state of spring anchorage bracket 7, and their difference is greater than the distance of sliding when flow detector travelling carriage 2 works.
The rear portion of flow detector travelling carriage 2 is connected in the middle part of moving plate support 3, and spring 8 is arranged on the position of corresponding flow detector travelling carriage 2, namely two springs 8 with flow detector travelling carriage 2 for mid point is settled.Such could guaranteed flow detector travelling carriage 2 smooth sliding better.
See Fig. 2.The through hole passed through for flexible pipe of flow detector fixed mount 16 is semicircle, and the through hole passed through for flexible pipe of flow detector travelling carriage 2 is semicircle.
See Fig. 5.Environmental water sample automatic filtering apparatus filter membrane duty intelligent detector of the present invention, its moving plate and stator are electrically connected to the testing circuit of variable capacitance.Moving plate and stator and the insulating paper between being clipped in, composition variable capacitance.
Sine wave source 20 produces mid-frequency sinusoidal signal, sinusoidal signal is divided into two-way, one tunnel is added in by variable capacitance 21(and moving plate and stator) and the input of resistance 27 built-up circuit, another road is added to the reference signal end of phase sensitive detection circuit 23 after signal conditioning circuit 22.Due to the effect of electric capacity, make by the output sinusoidal signal of variable capacitance 21 and resistance 27 built-up circuit compared with input sinusoidal signal, have the delayed of a phase place, the change of variable capacitance 21 electric capacity, must cause the change of lagging phase.Phase sensitive detection circuit 23 exports and is directly proportional to two input signal phase difference sizes, and phase difference is larger, and the output of phase sensitive detection circuit 23 is larger.The output of phase sensitive detection circuit 23, after small signal amplifier 24, detecting circuit 25 and low-pass filter circuit 26, is delivered to the analog-to-digital conversion pin of microcontroller 28.After signal enters microcontroller 28, first after signal adjustment, directly carry out analog-to-digital conversion, computing is carried out to the data signal after conversion, compare with the related data be stored in advance in microcontroller 28, judge the flow of water sample in back segment aqueduct, then through data signal line 29, CAN interface circuit 30 and CAN connecting line 31, finally deliver to master controller.So that master controller controls automatic filtering apparatus each several part workflow in real time, ensure that whole system works in order.
Embodiment 2
The application of environmental water sample automatic filtering apparatus filter membrane duty intelligent detector of the present invention
See Fig. 6.Filter membrane duty intelligent detector 41 is placed in back segment delivery hose 42, namely after filter membrane 46.It is middle with bottom cone 47 that filter membrane 46 is clipped in top cone 45.Peristaltic pump 51 is placed in leading portion delivery hose 50, namely before filter membrane 46.Filter membrane duty intelligent detector 41 arranges CAN interface II 55, is connected to CAN interface I 52 by bus connection wire 54, and enters into master board 53.
During work, peristaltic pump 51 rotates, water sample 48 to be filtered is extracted from water sample container 49 to be filtered, to be delivered to after filtration in water sample container 43 through leading portion delivery hose 50, peristaltic pump 51, bottom cone 47, filter membrane 46, top cone 45, back segment delivery hose 42, filter membrane duty standardization intelligent detector 41, complete the filtration treated and filter water sample 48, obtain filtering rear water sample 44.
If filter membrane 46 blocks, although peristaltic pump 51 rotates, water sample 48 to be filtered can only deliver to bottom cone 47 place.In top cone 45, back segment delivery hose, 42 flow without water sample, filter membrane duty intelligent detector 41 detects this state, from CAN interface II 55, through bus connection wire 54, CAN I 52, by this status report to the master controller in master board 53, master controller thus judge whether needs to interrupt filter process, start and change filter membrane program, realize the automatic replacing of filter membrane.
Claims (9)
1. environmental water sample automatic filtering apparatus filter membrane duty intelligent detector, is characterized in that being made up of flexible pipe flow detector, moving plate and stator three parts;
Described flexible pipe flow detector comprises flow detector fixed mount and flow detector travelling carriage, flow detector fixed mount is fixed on shell, arranging can the sliding tray that slides wherein of transportation flux detector travelling carriage, and arranges the through hole passed through for flexible pipe with sliding tray square crossing; Flow detector travelling carriage front portion arranges the through hole being used for flexible pipe and passing through, and rear portion is connected with moving plate support;
Described moving plate is fixed on moving plate support, and described stator is fixed on stator support, and stator support is fixed on shell, arranges spring between moving plate support and stator support, and moving plate is equal with the quantity of stator, has insulating paper to isolate between moving plate and stator.
2. detector according to claim 1, is characterized in that: moving plate is two groups, and the sheet number of moving plate, for often to organize 2 ~ 8, forms two groups of moving plate pole plate groups; The group number of stator and often to organize the sheet number of stator identical with moving plate, forms two groups of stator pole plate groups, and the moving plate in the stator in stator pole plate group and moving plate pole plate group interts between two to be settled.
3. detector according to claim 2, it is characterized in that: two groups of moving plate pole plate groups are arranged on the upper and lower symmetric position of moving plate support, moving plate pole plate group and lower moving plate pole plate group in formation, two groups of stator pole plate groups are arranged on the upper and lower symmetric position of stator support, form the upper stator pole plate group corresponding with moving plate pole plate group and lower stator pole plate group.
4. detector according to claim 1, it is characterized in that: number of springs is 1 ~ 4, and spring anchorage bracket for placing spring is set, the length be shorter in length than when spring ejects state of spring anchorage bracket, and the distance of sliding when their difference is greater than the work of flow detector travelling carriage.
5. detector according to claim 1, is characterized in that: the rear portion of flow detector travelling carriage is connected to moving plate mid-stent, and spring is arranged on the position of corresponding flow detector travelling carriage.
6. detector according to claim 1, is characterized in that: moving plate is positioned on stator, and the insulating paper between moving plate and stator is fixed under moving plate, and moves together with moving plate.
7. detector according to claim 1, is characterized in that: moving plate is positioned on stator, and the insulating paper between moving plate and stator is fixed on stator.
8. detector according to claim 1, is characterized in that: the through hole passed through for flexible pipe of flow detector fixed mount, is circular hole, semicircle or U-shaped breach;
The through hole passed through for flexible pipe of flow detector travelling carriage is circular hole, semicircle or U-shaped breach.
9. detector according to claim 1, is characterized in that: moving plate and stator are electrically connected to the testing circuit of variable capacitance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310473494.0A CN103480197B (en) | 2013-10-12 | 2013-10-12 | Intelligent detector for working state of filter membrane of fully-automatic filter device for environmental water sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310473494.0A CN103480197B (en) | 2013-10-12 | 2013-10-12 | Intelligent detector for working state of filter membrane of fully-automatic filter device for environmental water sample |
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| Publication Number | Publication Date |
|---|---|
| CN103480197A CN103480197A (en) | 2014-01-01 |
| CN103480197B true CN103480197B (en) | 2015-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310473494.0A Expired - Fee Related CN103480197B (en) | 2013-10-12 | 2013-10-12 | Intelligent detector for working state of filter membrane of fully-automatic filter device for environmental water sample |
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Citations (6)
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|---|---|---|---|---|
| DE3820878A1 (en) * | 1988-06-21 | 1989-12-28 | Wolfgang Dipl Phys Scholl | Capacitive sensor element for the construction of mechanical-electrical transducers |
| CN1869599A (en) * | 2005-05-27 | 2006-11-29 | 上海自动化仪表股份有限公司 | Multi-parameter sensor for measuring differential pressure/pressure/temp |
| CN2903925Y (en) * | 2006-04-21 | 2007-05-23 | 山东正浩给水设备科技有限公司 | Flow detector |
| CN101623572A (en) * | 2006-04-12 | 2010-01-13 | 米利波尔有限公司 | Filter with memory, communication and pressure sensor |
| CN201768433U (en) * | 2010-07-20 | 2011-03-23 | 上海复济生物科技有限公司 | Water purifier filter element monitoring device |
| CN103063236A (en) * | 2011-10-19 | 2013-04-24 | 常州三恒电器有限公司 | Capacitive sensor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63305907A (en) * | 1987-06-08 | 1988-12-13 | Toshiba Corp | Monitor for clogging of filter medium of filter |
| JPH10113651A (en) * | 1996-10-07 | 1998-05-06 | Minoru Ind Co Ltd | Household water purifying device |
| US7879226B2 (en) * | 2008-02-18 | 2011-02-01 | Eiko Electric Products Corp. | Flow indicator for showing blocking of filter cotton |
-
2013
- 2013-10-12 CN CN201310473494.0A patent/CN103480197B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3820878A1 (en) * | 1988-06-21 | 1989-12-28 | Wolfgang Dipl Phys Scholl | Capacitive sensor element for the construction of mechanical-electrical transducers |
| CN1869599A (en) * | 2005-05-27 | 2006-11-29 | 上海自动化仪表股份有限公司 | Multi-parameter sensor for measuring differential pressure/pressure/temp |
| CN101623572A (en) * | 2006-04-12 | 2010-01-13 | 米利波尔有限公司 | Filter with memory, communication and pressure sensor |
| CN2903925Y (en) * | 2006-04-21 | 2007-05-23 | 山东正浩给水设备科技有限公司 | Flow detector |
| CN201768433U (en) * | 2010-07-20 | 2011-03-23 | 上海复济生物科技有限公司 | Water purifier filter element monitoring device |
| CN103063236A (en) * | 2011-10-19 | 2013-04-24 | 常州三恒电器有限公司 | Capacitive sensor |
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Granted publication date: 20150304 Termination date: 20161012 |