CN114488933A - Sewage treatment control system based on thing networking remote monitering terminal - Google Patents
Sewage treatment control system based on thing networking remote monitering terminal Download PDFInfo
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- 239000010865 sewage Substances 0.000 title claims abstract description 75
- 230000006855 networking Effects 0.000 title abstract description 4
- 238000004891 communication Methods 0.000 claims abstract description 61
- 238000012544 monitoring process Methods 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 8
- 235000014676 Phragmites communis Nutrition 0.000 claims description 6
- 230000002572 peristaltic effect Effects 0.000 claims description 6
- 239000010802 sludge Substances 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 4
- 230000003993 interaction Effects 0.000 claims description 4
- 238000004065 wastewater treatment Methods 0.000 claims 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 238000004422 calculation algorithm Methods 0.000 description 7
- 231100000279 safety data Toxicity 0.000 description 6
- 230000008569 process Effects 0.000 description 5
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- 238000004088 simulation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
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Abstract
The invention provides a sewage treatment control system based on an Internet of things remote monitoring terminal, which comprises the Internet of things remote monitoring terminal, remote network communication connection equipment and a sewage treatment control system; a modem of the Internet of things remote monitoring terminal is wirelessly connected with a modem of the remote network communication connection equipment; the modem of the sewage treatment control system is in communication connection with the modem of the remote network communication connection equipment through a serial port; the invention adopts the remote control technology based on the monitoring of the Internet of things, is not limited by regions, particularly some remote regions, can gather the safety information of sewage treatment in various regions and uniformly monitor the safety information, reduces the labor intensity of workers and is convenient for off-line monitoring; the advantage of thing networking control still lies in can learning the data message in different areas as early as possible, can in time inform the staff in other places when certain sewage treatment control system breaks down and strengthen taking precautions against, has improved the reliable security of sewage treatment system.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a sewage treatment control system based on an Internet of things remote monitoring terminal.
Background
Under the condition that the social water pollution problem is more serious and the development of human beings is influenced, the government of China increases the force, on one hand, people are taught to save water and reduce discharge, on the other hand, sewage treatment stations are actively built, the force for treating industrial sewage and domestic sewage is increased, the sewage can be treated and then discharged, and the series of measures achieve great effect.
However, there are still a number of problems in the operation of sewage treatment plants over a long period of time: in order to save cost and increase economic benefit, some sewage treatment stations do not overhaul and maintain equipment after the equipment runs for a period of time, so that the treatment capacity of the sewage treatment stations is greatly reduced, and under the condition, sewage treated by the sewage treatment stations can not be discharged up to the standard basically; more serious is that some sewage treatment stations even shut down the equipment in some time periods, and directly discharge the untreated sewage. In view of the above problems, it is now urgently needed to increase the supervision of the sewage treatment station and to avoid the problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a sewage treatment control system based on an Internet of things remote monitoring terminal.
The invention provides a sewage treatment control system based on an Internet of things remote monitoring terminal, which comprises the Internet of things remote monitoring terminal, remote network communication connection equipment and a sewage treatment control system;
the modem of the Internet of things remote monitoring terminal is wirelessly connected with the modem of the remote network communication connection equipment; the modem of the sewage treatment control system is in communication connection with the modem of the remote network communication connection equipment through a serial port;
the remote network communication connection equipment comprises a serial port line, a communication interface and a user identification card; one end of the serial port line is connected with a communication interface of the sewage treatment control system, and the other end of the serial port line is connected with a communication interface of a modem of the remote network communication connection equipment; the user identification card is inserted into a slot of a modem of the remote network communication connection equipment;
the sewage treatment control system comprises a human-computer interaction device, a pH value monitor, a gas flowmeter, an oxygen content monitor, an air compressor, a frequency converter, a grid fence, a peristaltic pump, a return sludge pump and a display, and is electrically connected with the PLC.
Further, the grating fence comprises a grating dirt remover, a grating slag conveyor, a squeezer, a liquid level meter, a water inlet valve and a liquid level difference meter; the grid sewage-removing machine, the grid slag conveyor, the squeezer, the liquid level meter, the water inlet valve and the liquid level difference meter are respectively and electrically connected with the PLC.
Furthermore, the Internet of things remote monitoring terminal comprises an embedded CPU, a 3G/4G module, an NB-IOT module, a power module, a clock module, a memory, a Bluetooth communication module, a sensor interface and a reed switch; the 3G/4G module, the NB-IOT module, the power supply module, the clock module, the memory, the Bluetooth communication module, the sensor interface and the reed switch are respectively and electrically connected with the embedded CPU; the sensor interface is provided with an RS485 bus communication interface, an MBUS bus communication interface, an analog quantity signal acquisition interface, a switching value acquisition interface and a switching value output interface and can provide power output to an external sensor.
Further, the sewage treatment control system and the Internet of things remote monitoring terminal use 3G/4G or NB-IOT communication.
The invention provides a sewage treatment control system based on an Internet of things remote monitoring terminal, which comprises the Internet of things remote monitoring terminal, remote network communication connection equipment and a sewage treatment control system; the modem of the Internet of things remote monitoring terminal is wirelessly connected with the modem of the remote network communication connection equipment; the modem of the sewage treatment control system is in communication connection with the modem of the remote network communication connection equipment through a serial port; the remote network communication connection equipment comprises a serial port line, a communication interface and a user identification card; one end of the serial port line is connected with a communication interface of the sewage treatment control system, and the other end of the serial port line is connected with a communication interface of a modem of the remote network communication connection equipment; the user identification card is inserted into a slot of a modem of the remote network communication connection equipment; the sewage treatment control system comprises a human-computer interaction device, a pH value monitor, a gas flowmeter, an oxygen content monitor, an air compressor, a frequency converter, a grid fence, a peristaltic pump, a return sludge pump and a display, and is electrically connected with the PLC. The invention adopts the remote control technology based on the monitoring of the Internet of things, is not limited by regions, particularly some remote regions, can gather the safety information of sewage treatment in various regions and uniformly monitor the safety information, reduces the labor intensity of workers and is convenient for off-line monitoring; the advantage of thing networking control still lies in can learning the data message in different areas as early as possible, can in time inform the staff in elsewhere when certain sewage treatment control system breaks down and strengthen taking precautions against to the reliable security of sewage treatment system has been improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a sewage treatment control system based on an internet of things remote monitoring terminal according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a sewage treatment control system in a sewage treatment control system based on an internet of things remote monitoring terminal according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a fuzzy control structure according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the invention provides a sewage treatment control system based on an internet of things remote monitoring terminal, which comprises the internet of things remote monitoring terminal, a remote network communication connection device and a sewage treatment control system;
the modem of the Internet of things remote monitoring terminal is wirelessly connected with the modem of the remote network communication connection equipment; the modem of the sewage treatment control system is in communication connection with the modem of the remote network communication connection equipment through a serial port;
the remote network communication connection equipment comprises a serial port line, a communication interface and a user identification card; one end of the serial port line is connected with a communication interface of the sewage treatment control system, and the other end of the serial port line is connected with a communication interface of a modem of the remote network communication connection equipment; the user identification card is inserted into a slot of a modem of the remote network communication connection equipment;
as shown in figure 2, the sewage treatment control system comprises a human-computer interaction device, a pH value monitor, a gas flowmeter, an oxygen content monitor, an air compressor, a frequency converter, a grid fence, a peristaltic pump, a return sludge pump and a display, and is electrically connected with the PLC.
Optionally, the grating fence comprises a grating cleaner, a grating slag conveyor, a squeezer, a level meter, a water inlet valve and a level difference meter; the grid sewage-removing machine, the grid slag conveyor, the squeezer, the liquid level meter, the water inlet valve and the liquid level difference meter are respectively and electrically connected with the PLC.
Optionally, the internet of things remote monitoring terminal includes an embedded CPU, a 3G/4G module, an NB-IOT module, a power module, a clock module, a memory, a bluetooth communication module, a sensor interface, and a reed switch; the 3G/4G module, the NB-IOT module, the power supply module, the clock module, the memory, the Bluetooth communication module, the sensor interface and the reed switch are respectively and electrically connected with the embedded CPU; the sensor interface is provided with an RS485 bus communication interface, an MBUS bus communication interface, an analog quantity signal acquisition interface, a switching value acquisition interface and a switching value output interface and can provide power output to an external sensor.
Optionally, the sewage treatment control system and the internet of things remote monitoring terminal use 3G/4G or NB-IOT communication.
As shown in fig. 3, when the sewage treatment control system based on the remote monitoring terminal of the internet of things provided by the invention is in use, an access user name and a password of a function key on a menu bar of a touch screen of a man-machine interface of an operation console of the sewage treatment automatic control system are set; setting a user name and a password of a user identification card on the modem; setting a domain name of a PC (personal computer) of the remote monitoring terminal of the Internet of things;
after the sewage treatment control system operates, the sensors send the measured temperature, DO value and PH value into a PLC special module for digital-analog conversion and data processing, and the PLC combines with a fuzzy controller to finish automatic measurement and control of the temperature, the DO value and the PH value, so that the optimal speed regulation of an air compressor and a frequency converter, the automatic start and stop of a peristaltic pump and a return sludge pump and the automatic switching of the working and standby operation states of the pumps are realized; the information of the operating condition of the sewage treatment control system is also subjected to data processing and then transmitted to a computer through a serial port, and a field monitoring picture of the operating state of the sewage treatment control system is displayed;
the sewage treatment process has strong uncertainty, the technical indexes such as DO value, PH value and the like are difficult to effectively control, and the fuzzy control algorithm can realize the cooperative control of the technical indexes such as DO value, PH value and the like of the dissolved oxygen in the sewage treatment process. The control method utilizes a fuzzy control algorithm to establish the fuzzy controller, establishes a loop of the fuzzy controller and a control object, utilizes the fuzzy control method to control the technical indexes such as the DO value, the PH value and the like of the dissolved oxygen, and can quickly and accurately control the technical indexes such as the DO value, the PH value and the like of the dissolved oxygen under different operating conditions.
On the basis of establishing a mathematical model, a controlled object is utilized to obtain a second-order transfer function with hysteresis link property by continuously adjusting and changing a control DO parameter value, and the method specifically comprises the following steps:
where K is the total gain value, τ is the lag time, T1Is a constant of inertia time, T2Is a single machine time constant.
In sewage treatment control, the set values of the parameters affect a number of factors, wherein the sewage needs to be settled in the settling tank for a period of time, and under the condition of sufficient DO value, the load of the inlet water is relatively low, so that the dissolved oxygen in the composite bioreactor is kept between the required amounts. In addition, the water inlet load at each specific period needs to set the parameter value which can be fully loaded by the automatic control system. Therefore, in order to maintain the DO value sufficient, the dissolved oxygen in the composite bioreactor can be controlled between the required amount, the sewage treatment performance under the low temperature condition is influenced by the pH value, and the optimal pH value of the sewage treatment system can be controlled to be about 7-7.5.
In the online operation process, the control system firstly processes the fuzzy control rule and takes the current sampling value to obtain a set value r (t) and a feedback value; obtaining the e error and the ec error change rate at the current moment through the error calculation module, and assigning the current e (t) error to the error at the previous moment to be used as a spare; thus forming a parameter cycle, finally fuzzifying the input of the fuzzy controller, and carrying out fuzzy setting kpRatio, kiIntegral sum kdThe differential coefficients are algorithmically output by algorithm c (t) and thus form a loop.
The fuzzy subset e, ec ═ { NB, NM, NS, O, PS, PM, PB }, in the fuzzy control algorithm, respectively represent negative large, negative medium, negative small, zero, positive small, positive medium, positive large. And obtaining the proportional, integral and differential action coefficients of the membership assignment table and the parameter fuzzy control model of each subset, wherein the membership assignment table and the parameter fuzzy control model are respectively expressed as:
error value e, k of dissolved oxygen according to discrete universe of discourse e, ecp，ki，kdThe control rules of the fuzzy control algorithm are established as follows.
TABLE 1 control rule Table for fuzzy control Algorithm
In the automatic control system, an algorithm is optimally controlled to select a membership function, firstly, a simulink module in matlab software is used for simulation and assignment is carried out on variables of the simulink module; secondly, establishing a water treatment fuzzy control simulation structure chart by using a simulink simulation module and editing and modifying parameters of the water treatment fuzzy control simulation structure chart; finally, 49 If … Then statements are used to ensure stability and prevent overshoot, establishing conditional endings:
If(e is NB)and(ec is NB)then(kp is PB)and(ki is NB)and(kd is NB)；
If(e is NM)and(ec is NB)then(kp is PB)and(ki is NB)and(kd is NM)；
If(e is NS)and(ec is NB)then(kp is PB)and(ki is NM)and(kd is NM)；
If(e is O)and(ec is NB)then(kp is NM)and(ki is NM)and(kd is NS)；
after the fuzzy rule operation is completed, the fuzzy rule observer, the water level controller graph and the oscillogram can be obtained, and the working efficiency of the system is obviously improved and the accuracy of the related optimal optimization parameters is verified according to the oscillogram result. The fuzzy control keeps the content of dissolved oxygen in the water tank, completes oxygen supply, overshoot control of the system, anti-interference capability, response speed, and precision and stability of regulation, and can realize automatic control of sewage treatment.
Setting a modem to enable the data transmission state to be in, receiving safety data information transmitted by a sewage treatment control system through a serial port, processing the data, and transmitting the processed data to a network through a TCP/IP protocol on the modem;
after the PC of the remote monitoring terminal of the Internet of things is connected with the Internet of things, the PC logs in the IP of the 3G/4G network and inputs the user name and the password of the preset user identification card, and then a plurality of sewage treatment operation pictures are displayed on the display.
Once the abnormal condition occurs, the PC can send the command to the modem in time through the Internet of things and the 3G/4G network, then the modem processes data and sends the data to the sewage treatment control system through the interface and the serial port line, the sent query and control command can be displayed on the human-computer interface touch screen, and the fault position of the controller is checked and controlled according to the command.
All monitoring switching values and analog quantities are sent to a PLC input port, water temperature, DO value and PH value which are measured by a sensor are sent to a PLC special module through a communication system for analog-digital conversion and processing, the PLC completes automatic control of the water temperature, DO value and PH value control system according to a preset program, and the optimal variable frequency speed regulation of an air compressor and a frequency converter, automatic start and stop of a peristaltic pump and a return sludge pump and automatic switching of working and standby running states of the pumps are realized, so that the running of the automatic control system for sewage treatment is in the optimal state.
After the sewage treatment automatic control system collects the safety data, the safety data are processed by the upgraded communication processing program and are sent to the modem from the interface of the computer control system. The modem unpacks the data after receiving the data, extracts necessary data information, summarizes and repackages the data information into packets, and then sends the packets to the 3G/4G network. As the 3G/4G network and the Internet of things are IP protocols and are mutually connected, the PC of the remote monitoring terminal of the Internet of things can receive the safety data of the sewage automatic control system as long as being connected with the network, and the control command can also be transmitted to the modem through the Internet of things and the 3G/4G network, then transmitted to the sewage treatment control system through the interface by the modem and displayed on a human-computer interface.
The monitoring of the sewage treatment control system is divided into two parts of on-site monitoring and remote monitoring. The field monitoring is realized through a touch screen control system, the safety data of sewage treatment are directly transmitted to the touch screen control system through an interface inside an operation console by a PLC communication module, but the field monitoring is difficult to realize in some remote areas. The remote monitoring is realized through a PC (personal computer) of the monitoring terminal of the Internet of things, safety data information sent by an automatic sewage treatment control system on a 3G/4G network is received through the Internet, a column of remote working condition monitoring on an interface is clicked, and dynamic sewage treatment monitoring pictures of various places can be displayed on a display screen of the PC through real-time updating.
The invention has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to be construed in a limiting sense. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its embodiments without departing from the spirit and scope of the present invention, which fall within the scope of the present invention. The scope of the invention is defined by the appended claims.
Claims (4)
1. A sewage treatment control system based on an Internet of things remote monitoring terminal is characterized by comprising the Internet of things remote monitoring terminal, remote network communication connection equipment and a sewage treatment control system;
the modem of the Internet of things remote monitoring terminal is wirelessly connected with the modem of the remote network communication connection equipment; the modem of the sewage treatment control system is in communication connection with the modem of the remote network communication connection equipment through a serial port;
the remote network communication connection equipment comprises a serial port line, a communication interface and a user identification card; one end of the serial port line is connected with a communication interface of the sewage treatment control system, and the other end of the serial port line is connected with a communication interface of a modem of the remote network communication connection equipment; the user identification card is inserted into a slot of a modem of the remote network communication connection equipment;
the sewage treatment control system comprises a human-computer interaction device, a pH value monitor, a gas flowmeter, an oxygen content monitor, an air compressor, a frequency converter, a grid fence, a peristaltic pump, a return sludge pump and a display, and is electrically connected with the PLC.
2. The wastewater treatment control system according to claim 1, wherein the grating comprises a grating de-dirt machine, a grating residue conveyor, a presser, a level meter, a water inlet valve, a level difference meter; the grid sewage-removing machine, the grid slag conveyor, the squeezer, the liquid level meter, the water inlet valve and the liquid level difference meter are respectively and electrically connected with the PLC.
3. The sewage treatment control system of claim 1, wherein the internet of things remote monitoring terminal comprises an embedded CPU, a 3G/4G module, an NB-IOT module, a power module, a clock module, a memory, a Bluetooth communication module, a sensor interface and a reed switch; the 3G/4G module, the NB-IOT module, the power supply module, the clock module, the memory, the Bluetooth communication module, the sensor interface and the reed switch are respectively and electrically connected with the embedded CPU; the sensor interface is provided with an RS485 bus communication interface, an MBUS bus communication interface, an analog quantity signal acquisition interface, a switching value acquisition interface and a switching value output interface and can provide power output to an external sensor.
4. The wastewater treatment control system according to claim 1, wherein the wastewater treatment control system and the remote monitoring terminal of the internet of things communicate using 3G/4G or NB-IOT.
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| KR20040019691A (en) * | 2002-08-29 | 2004-03-06 | 엔비넷 주식회사 | direct auto control system and control method therof for computer based lead to through internet in sewage and wastewater disposal plant |
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| CN110606617A (en) * | 2018-06-15 | 2019-12-24 | 上海城投污水处理有限公司 | Sewage treatment distributed control system |
-
2022
- 2022-01-26 CN CN202210091142.8A patent/CN114488933A/en active Pending
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| KR20040019691A (en) * | 2002-08-29 | 2004-03-06 | 엔비넷 주식회사 | direct auto control system and control method therof for computer based lead to through internet in sewage and wastewater disposal plant |
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