CN106406084A - Dosing system fuzzy controller - Google Patents
Dosing system fuzzy controller Download PDFInfo
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- CN106406084A CN106406084A CN201510463123.3A CN201510463123A CN106406084A CN 106406084 A CN106406084 A CN 106406084A CN 201510463123 A CN201510463123 A CN 201510463123A CN 106406084 A CN106406084 A CN 106406084A
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Abstract
The dosing system fuzzy controller of the invention can well improve the reliability and the stability of a dosing system, and saves water treatment cost to a great extent. The dosing system fuzzy controller comprises a fuzzy controller, a variable-frequency control system, a metering and dosing system, a coagulating sedimentation water treatment system, a flow sensor, a flow transmitter, an incoming water turbidity sensor, an incoming water turbidity transmitter, an outgoing water turbidity sensor, and an outgoing water turbidity transmitter. Incoming water flows in through the flow sensor, the incoming water turbidity sensor and the coagulating sedimentation water treatment system. The output end of the flow sensor is connected with the flow transmitter. The output end of the incoming water turbidity sensor is connected to the incoming water turbidity transmitter. The output ends of the flow transmitter and the incoming water turbidity transmitter are connected with the input end of the fuzzy controller. The fuzzy controller is connected with the variable-frequency control system. The variable-frequency control system is connected with the metering and dosing system. The metering and dosing system is connected with the coagulating sedimentation water treatment system. The output end of the coagulating sedimentation water treatment system is connected with the outgoing water turbidity sensor.
Description
Technical field
The invention belongs to Mine Water Transacting Technology field, more particularly to a kind of medicine system fuzzy controller.
Background technology
In water treatment procedure, coagulation is a very important process procedure, for removing the suspended particle in eliminating water and colloidal substance, so that water quality is purified.Mine water is a kind of special industrial wastewater producing in coal mining enterprise's production process, mainly contain coal dust and rock dust, coagulation-settlement process is generally individually adopted to its removal, the quality of wherein coagulation effect directly affects effluent quality and the processing cost of water treatment system, and this effect depends primarily on the optimal addition dosage of coagulant.But, coagulation process is the complication system of a non-linear, big time lag, is difficult to be described its process with accurate mathematical model.But, fuzzy control theory in recent years, make its question simplification, fuzzy control is an important branch of Based Intelligent Control, fuzzy control is the control rule that operator or expert controlled experience become language variable description with the representation of knowledge, then goes control system with these rules, fuzzy control is particularly well-suited to the control of unknown, the complicated nonlinear system of mathematical model, FUZZY ALGORITHMS FOR CONTROL almost can apply to various water treatment procedures, including the control of chemical feeding quantity.
Content of the invention
The present invention is exactly to realize accurately adding of coagulant during purification of mine drainage handling process, providing a kind of medicine system fuzzy controller；The present invention can be good at improving the reliability and stability of medicine system, and has largely saved cost of water treatment.
For realizing the above-mentioned purpose of the present invention, the present invention adopts the following technical scheme that.
A kind of present invention medicine system fuzzy controller, using the feedforward plus feedback control, including fuzzy controller, frequency-changing control system, metering dosing system, coagulating sedimentation water treatment system, flow transducer, flow transmitter, influent turbidity sensor, influent turbidity transmitter, delivery turbidity sensor, delivery turbidity transmitter；Its structural feature is：Described water inlet is flowed into by flow transducer, influent turbidity sensor and coagulating sedimentation water treatment system, the outfan connection traffic transmitter of flow transducer, the outfan of influent turbidity sensor connects influent turbidity transmitter, and the outfan of described flow transmitter and influent turbidity transmitter connects the input of fuzzy controller；Described fuzzy controller is connected with frequency-changing control system, and frequency-changing control system is connected with metering dosing system, and metering dosing system is connected with coagulating sedimentation water treatment system；The outfan of described coagulating sedimentation water treatment system connects delivery turbidity sensor, and the outfan of delivery turbidity sensor connects delivery turbidity transmitter, and the outfan of delivery turbidity transmitter connects the input of fuzzy controller.
As a preferred embodiment of the present invention, described fuzzy controller adopts the S7-1200 series of PLC of Siemens.
As another kind of preferred version of the present invention, described flow transducer adopts OPTIFLUX2000 series electromagnetic flowmeter.
As another kind of preferred version of the present invention, described influent turbidity sensor and delivery turbidity sensor are respectively adopted SS7 high range and 1720E lower range.
The invention has the beneficial effects as follows.
The present invention provides a kind of medicine system fuzzy controller, method using the feedforward plus feedback control, by introducing the feedback control with delivery turbidity as feedback quantity, the feedforward with flow of inlet water and influent turbidity as main control parameters is revised in real time, thus realizing the accurate calculating of mine water treatment system medicament optimum dosage；Wherein feedback control to be realized using FUZZY ALGORITHMS FOR CONTROL, and come the feedforward and the feedback control of completion system with reference to PLC, and the present invention solves the control instability problem existing only with the feedforward.
This control system, on the premise of ensureing delivery turbidity, can be saved medicament 1 0% about, greatly save reagent cost, have obvious economic benefit, meanwhile, control system for adding drugs does not need to adjust manually, improves the automatization level of water treatment system.
Brief description
Fig. 1 is a kind of system construction drawing of present invention medicine system fuzzy controller.
Fig. 2 is a kind of PLC fuzzy control flow chart of present invention medicine system fuzzy controller.
Specific embodiment
As shown in figure 1, the system construction drawing for a kind of present invention medicine system fuzzy controller.Using the feedforward plus feedback control, including fuzzy controller, frequency-changing control system, metering dosing system, coagulating sedimentation water treatment system, flow transducer, flow transmitter, influent turbidity sensor, influent turbidity transmitter, delivery turbidity sensor, delivery turbidity transmitter；Its structural feature is：Described water inlet is flowed into by flow transducer, influent turbidity sensor and coagulating sedimentation water treatment system, the outfan connection traffic transmitter of flow transducer, the outfan of influent turbidity sensor connects influent turbidity transmitter, and the outfan of described flow transmitter and influent turbidity transmitter connects the input of fuzzy controller；Described fuzzy controller is connected with frequency-changing control system, and frequency-changing control system is connected with metering dosing system, and metering dosing system is connected with coagulating sedimentation water treatment system；The outfan of described coagulating sedimentation water treatment system connects delivery turbidity sensor, and the outfan of delivery turbidity sensor connects delivery turbidity transmitter, and the outfan of delivery turbidity transmitter connects the input of fuzzy controller.
Described fuzzy controller adopts the S7-1200 series of PLC of Siemens；Described fuzzy controller typically can be completed by traditional single-chip microcomputer or micro computer, fuzzy monolithic process chip, programmable gate array chip, programmable logic controller (PLC) etc..
Fuzzy controller PLC of the present invention is pre-stored with Table Model and fuzzy control rule, by flow transducer, influent turbidity sensor as fuzzy controller primary input；It is pre-stored in the Table Model in PLC by inquiry, main dosing value can be obtained, again using delivery turbidity as correction input, by fuzzy controller computing, obtain a chemical feeding quantity correction value, using this value, main chemical feeding quantity is modified, just can get actual chemical feeding quantity, the analog output module recycling PLC system outputs a control signal to frequency conversion medicine system, realizes accurately adding of medicament, to ensure optimum dosage.
Described flow transducer adopts OPTIFLUX2000 series electromagnetic flowmeter；Described influent turbidity sensor and delivery turbidity sensor are respectively adopted SS7 high range and 1720E lower range.
Practical situation according to medicine system, its feedback control adopts fuzzy control, therefore from the two-dimensional fuzzy controller with two input variables and an output variable, using the error e of the delivery turbidity value after dosing coagulating sedimentation and established standardses turbidity value and its error change de as input variable, using correction value u of chemical feeding quantity as output variable.
The software program of fuzzy controller S7-1200 series of PLC of the present invention adopts the TIA Portal STEP7 of Siemens
Professional V12 software is write, and as a subprogram of whole PLC program, major function includes data acquisition, fuzzy operation and control signal output to fuzzy control program.Wherein fuzzy operation is the emphasis of program：First the error quantization factor, error variance quantizing factor, control output-scale-factor and the fuzzy polling list that are used for fuzzy control are stored in the depositor in PLC；Then is arranged to fuzzy control a time control cycle, a fuzzy control operation is completed in a cycle, before this collection was measured to actual delivery turbidity, and save it in after carrying out conversion process in depositor, also previous collection value is saved in different depositors simultaneously, so just can calculate turbidity error e and error change de, again Fuzzy processing is carried out to it, obtain the fuzzy theory field element corresponding to E and Ec, and then by inquiring about fuzzy polling list, obtain fuzzy control output, and ambiguity solution is carried out to fuzzy output amount, thus obtaining the control output of reality；Finally, this control output is made a gift to someone to frequency conversion control system for adding drugs, the chemical feeding quantity control signal that the feedforward is calculated is modified, and obtains final chemical feeding quantity control signal.Particular flow sheet, can be found in shown in Fig. 2.
It is understandable that, above with respect to the specific descriptions of the present invention, it is merely to illustrate the present invention and is not limited to the technical scheme described by the embodiment of the present invention, it will be understood by those within the art that, still the present invention can be modified or equivalent, to reach identical technique effect；As long as meeting and using needs, all within protection scope of the present invention.
Claims (4)
1. a kind of medicine system fuzzy controller, using the feedforward plus feedback control, including fuzzy controller, frequency-changing control system, metering dosing system, coagulating sedimentation water treatment system, flow transducer, flow transmitter, influent turbidity sensor, influent turbidity transmitter, delivery turbidity sensor, delivery turbidity transmitter；It is characterized in that：Described water inlet is flowed into by flow transducer, influent turbidity sensor and coagulating sedimentation water treatment system, the outfan connection traffic transmitter of flow transducer, the outfan of influent turbidity sensor connects influent turbidity transmitter, and the outfan of described flow transmitter and influent turbidity transmitter connects the input of fuzzy controller；Described fuzzy controller is connected with frequency-changing control system, and frequency-changing control system is connected with metering dosing system, and metering dosing system is connected with coagulating sedimentation water treatment system；The outfan of described coagulating sedimentation water treatment system connects delivery turbidity sensor, and the outfan of delivery turbidity sensor connects delivery turbidity transmitter, and the outfan of delivery turbidity transmitter connects the input of fuzzy controller.
2. a kind of medicine system fuzzy controller according to claim 1 it is characterised in that：Described fuzzy controller adopts the S7-1200 series of PLC of Siemens.
3. a kind of medicine system fuzzy controller according to claim 1 it is characterised in that：Described flow transducer adopts OPTIFLUX2000 series electromagnetic flowmeter.
4. a kind of medicine system fuzzy controller according to claim 1 it is characterised in that：Described influent turbidity sensor and delivery turbidity sensor are respectively adopted SS7 high range and 1720E lower range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510463123.3A CN106406084A (en) | 2015-08-01 | 2015-08-01 | Dosing system fuzzy controller |
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| CN201510463123.3A CN106406084A (en) | 2015-08-01 | 2015-08-01 | Dosing system fuzzy controller |
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| CN106406084A true CN106406084A (en) | 2017-02-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107807679A (en) * | 2017-11-28 | 2018-03-16 | 湖南工业大学 | A kind of oil dosing automatic ration control system and control method |
| CN108255056A (en) * | 2017-12-29 | 2018-07-06 | 武汉长江仪器自动化研究所有限公司 | Water factory's intelligent dosing control system and its control method |
| CN109264840A (en) * | 2018-11-19 | 2019-01-25 | 山信软件股份有限公司 | A kind of horizontal sedimentation tank control system for adding drugs |
| WO2022090630A1 (en) * | 2020-10-30 | 2022-05-05 | Kemira Oyj | A control system of a copper extraction process |
-
2015
- 2015-08-01 CN CN201510463123.3A patent/CN106406084A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107807679A (en) * | 2017-11-28 | 2018-03-16 | 湖南工业大学 | A kind of oil dosing automatic ration control system and control method |
| CN108255056A (en) * | 2017-12-29 | 2018-07-06 | 武汉长江仪器自动化研究所有限公司 | Water factory's intelligent dosing control system and its control method |
| CN109264840A (en) * | 2018-11-19 | 2019-01-25 | 山信软件股份有限公司 | A kind of horizontal sedimentation tank control system for adding drugs |
| WO2022090630A1 (en) * | 2020-10-30 | 2022-05-05 | Kemira Oyj | A control system of a copper extraction process |
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Application publication date: 20170215 |