CN103645652A - Intelligent in-water dissolved oxygen control system - Google Patents
Intelligent in-water dissolved oxygen control system Download PDFInfo
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- CN103645652A CN103645652A CN201310633794.0A CN201310633794A CN103645652A CN 103645652 A CN103645652 A CN 103645652A CN 201310633794 A CN201310633794 A CN 201310633794A CN 103645652 A CN103645652 A CN 103645652A
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- dissolved oxygen
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- temperature
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Abstract
The invention discloses an intelligent in-water dissolved oxygen control system which is characterized by comprising a power supply module, a data acquisition module, a programmable controller, a signal output module, a water storage container and a transmitter installed on the water storage container. The system adopts an intelligent transmitter which can accurately transmit dissolved oxygen content and temperature which are respectively detected by a dissolved oxygen probe and a temperature sensor probe to the data acquisition module. The data acquisition module transmits the data to the programmable controller. The programmable controller compares the actual dissolved oxygen value and temperature with a set actual dissolved oxygen value and a set temperature, calculates corresponding control signals according to a certain algorithm, reasonably regulates on-off and time ratio of an air valve and controls the content of dissolved oxygen in water in an intelligent mode.
Description
Technical field
The present invention relates to field of intelligent control technology, refer in particular to a kind of oxygen in water intelligent control system.
Background technology
In chemical industry, food, pharmaceutical field and laboratory, in reaction solution, the content of dissolved oxygen DO affects an important parameter of production technology or experimental result often, so often require strict this parameter of controlling near a certain setting value.And the dissolving of gas and eliminating are processes relatively lagging behind, need to reach balance the longer time, and forward control procedure is also unbalanced with reverse control procedure, these have brought very large difficulty all to accurately control dissolved oxygen content.The conventional obtainable control effect of pid control algorithm institute is not ideal enough, is difficult to meet strict control accuracy requirement.
Along with the development of control, computing machine, communication and network, measure and control instrument is just towards intellectuality, networking, integrated future development, and the dissolved oxygen DO transmitter of measuring for dissolved oxygen concentration is also gradually to high-intelligentization and high integration future development.But dissolved oxygen DO transmitter of the prior art mostly is uncompensated or only can realizes the dissolved oxygen DO transmitter of temperature compensation, it adopts analog output and ubiquity cost is high, function singleness, integrated level and the low problem of intelligent degree.That is to say, in prior art, also do not exist a kind of with the compensation of temperature compensation and salinity and can realize the dissolved oxygen intelligent transducer of online detection water body.
Summary of the invention
In view of this, the present invention is directed to the disappearance of prior art existence, its fundamental purpose is to provide to realize dissolved oxygen DO is monitored in real time and dissolved oxygen content is carried out to the intelligent oxygen in water intelligent controlling device of controlling.
For achieving the above object, the present invention adopts following technical scheme: a kind of oxygen in water intelligent control system, includes power module, data acquisition module, Programmable Logic Controller, signal output module, tank and be installed on the transmitter on tank;
This power module is for providing power supply to whole system;
This tank bottom is provided with air intake opening and water delivering orifice, and this tank top is provided with exhausr port, and this exhausr port is provided with exhaust apparatus, and this air intake opening is divided into two-way and is connected with respectively a solenoid valve and No. two solenoid valves, and this water delivering orifice is connected with a mixing pump;
This transmitter includes:
Dissolved oxygen probe, for gathering the dissolved oxygen DO signal of water body;
Temp probe, for gathering the temperature signal of water body; Exciting signal source, for providing voltage excitation signals and providing current excitation signal to described temp probe to described dissolved oxygen probe;
Signal condition module, generates dissolved oxygen DO voltage signal for described dissolved oxygen DO signal being converted to voltage signal and this voltage signal being amplified to process, and described temperature signal is amplified and processes generation temperature voltage signal;
Transmitter electrical form TEDS storer, for storing TEDS parameter, described TEDS parameter comprises channel information and the compensation for calibrating errors parameter that meets IEEE1451.2 standard; Microcontroller, for described dissolved oxygen DO voltage signal and temperature voltage signal are carried out to dissolved oxygen DO voltage signal and the temperature voltage signal of analog digital conversion process generating digital, and according to described channel information and compensation for calibrating errors parameter, digitized dissolved oxygen DO voltage signal and temperature voltage signal are carried out to computing generation dissolved oxygen content and temperature;
Bus interface module, the dissolved oxygen content and the temperature that for exporting described microcontroller, generate;
Transmitter power module for providing supply voltage to described microcontroller, provides supply voltage to described exciting signal source under the control of described microcontroller, and to described signal condition module, provides supply voltage under the control of described microcontroller;
This mixing pump is provided with two and exports and be divided into two-way, and a road directly flow back in tank, and dissolved oxygen probe and temp probe are housed in addition on the way;
This transmitter bus interface module is sent to data acquisition module by dissolved oxygen content and temperature, data acquisition module sends data to Programmable Logic Controller, and the output terminal of Programmable Logic Controller is connected on a solenoid valve or No. two solenoid valves by signal output module.
As a kind of preferred version, the outer setting of described dissolved oxygen probe has the dissolved oxygen probe protective sleeve with dissolved oxygen probe protective sleeve filter screen.
As a kind of preferred version, described exciting signal source, signal condition module, TEDS storer, power module and bus interface module are integrated on Transmitter Line plate, and described Transmitter Line plate is sealed in the terminal box shell that degree of protection is IP68.
As a kind of preferred version, described exciting signal source is polarisation voltage source, for providing polarizing voltage to described dissolved oxygen probe;
As a kind of preferred version, described signal condition module includes: current conversion amplifying circuit, generates described dissolved oxygen DO voltage signal for described dissolved oxygen DO signal being converted to voltage signal and this voltage signal being amplified to process;
Filter amplification circuit, generates temperature voltage signal for described temperature signal being amplified process.
As a kind of preferred version, described bus interface module adopts RS485 bus interface, and described bus interface module is supported IEEE1451.2 standard in agreement.
As a kind of preferred version, further include transmitter power management module, be connected with described power module, described microcontroller, described exciting signal source and described signal condition module, for stablizing the supply voltage that described power module provides, and supply voltage is offered to described microcontroller, described exciting signal source and described signal condition module.
As a kind of preferred version, described Programmable Logic Controller is provided with wireless communication module, by this wireless communication module, be connected with mobile communication equipment, the data that collect be delivered on keeper's mobile communication equipment, by mobile communication equipment, Programmable Logic Controller is operated simultaneously.
The present invention compared with prior art has obvious advantage and beneficial effect, specific as follows:
1, the present invention adopts intelligentized transmitter, the dissolved oxygen content and the temperature that can be accurately dissolved oxygen probe and temperature sensor probe be detected are sent to data acquisition module, data acquisition module sends data to Programmable Logic Controller, Programmable Logic Controller is connected on a solenoid valve or No. two solenoid valves by signal output module, Programmable Logic Controller is according to dissolved oxygen value and the temperature of actual dissolved oxygen value and temperature and setting, according to certain algorithm, calculate corresponding control signal, signal output module is sent to control signal on proportion magnetic valve.When actual dissolved oxygen DO is lower than setting value, forward is controlled and is started, and control signal will be sent on a solenoid valve, and now this valve passes in water oxygen-nitrogen mixture body according to the aperture of control signal size adjustment valve, and dissolved oxygen content starts to rise; When actual dissolved oxygen value is higher than setting value, oppositely to control and start, control signal will be sent on No. two solenoid valves, and now this valve passes in water nitrogen according to the aperture of control signal size adjustment valve, and dissolved oxygen content starts to decline.
2, the algorithm adopting in Programmable Logic Controller of the present invention limits the output area of control signal, and rationally regulates the time scale of its break-make, can effectively solve hysteresis quality and the unbalanced victory of forward and reverse control procedure of controlled system.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the present invention's embodiment.
Embodiment
Please refer to shown in Fig. 1, it has shown the workflow of the present invention's preferred embodiment, an oxygen in water intelligent control system, includes power module, data acquisition module, Programmable Logic Controller, signal output module, tank and is installed on the transmitter on tank;
This power module is for providing power supply to whole system;
This tank bottom is provided with air intake opening and water delivering orifice, and this tank top is provided with exhausr port, and this exhausr port is provided with exhaust apparatus, and this air intake opening is divided into two-way and is connected with respectively a solenoid valve and No. two solenoid valves, and this water delivering orifice is connected with a mixing pump;
This transmitter includes:
Dissolved oxygen probe, for gathering the dissolved oxygen DO signal of water body;
Temp probe, for gathering the temperature signal of water body; Exciting signal source, for providing voltage excitation signals and providing current excitation signal to described temp probe to described dissolved oxygen probe;
Signal condition module, generates dissolved oxygen DO voltage signal for described dissolved oxygen DO signal being converted to voltage signal and this voltage signal being amplified to process, and described temperature signal is amplified and processes generation temperature voltage signal;
Transmitter electrical form TEDS storer, for storing TEDS parameter, described TEDS parameter comprises channel information and the compensation for calibrating errors parameter that meets IEEE1451.2 standard; Microcontroller, for described dissolved oxygen DO voltage signal and temperature voltage signal are carried out to dissolved oxygen DO voltage signal and the temperature voltage signal of analog digital conversion process generating digital, and according to described channel information and compensation for calibrating errors parameter, digitized dissolved oxygen DO voltage signal and temperature voltage signal are carried out to computing generation dissolved oxygen content and temperature;
Bus interface module, the dissolved oxygen content and the temperature that for exporting described microcontroller, generate;
Transmitter power module for providing supply voltage to described microcontroller, provides supply voltage to described exciting signal source under the control of described microcontroller, and to described signal condition module, provides supply voltage under the control of described microcontroller;
This mixing pump is provided with two and exports and be divided into two-way, and a road directly flow back in tank, and dissolved oxygen probe and temp probe are housed in addition on the way;
This transmitter bus interface module is sent to data acquisition module by dissolved oxygen content and temperature, data acquisition module sends data to Programmable Logic Controller, and the output terminal of Programmable Logic Controller is connected on a solenoid valve or No. two solenoid valves by signal output module.
The outer setting of described dissolved oxygen probe has the dissolved oxygen probe protective sleeve with dissolved oxygen probe protective sleeve filter screen.
Described exciting signal source, signal condition module, TEDS storer, power module and bus interface module are integrated on Transmitter Line plate, and described Transmitter Line plate is sealed in the terminal box shell that degree of protection is IP68.
Described exciting signal source is polarisation voltage source, for providing polarizing voltage to described dissolved oxygen probe;
Described signal condition module includes: current conversion amplifying circuit, generates described dissolved oxygen DO voltage signal for described dissolved oxygen DO signal being converted to voltage signal and this voltage signal being amplified to process;
Filter amplification circuit, generates temperature voltage signal for described temperature signal being amplified process.
Described bus interface module adopts RS485 bus interface, and described bus interface module is supported IEEE1451.2 standard in agreement.
Further include transmitter power management module, be connected with described power module, described microcontroller, described exciting signal source and described signal condition module, for stablizing the supply voltage that described power module provides, and supply voltage is offered to described microcontroller, described exciting signal source and described signal condition module.
Described Programmable Logic Controller is provided with wireless communication module, by this wireless communication module, is connected with mobile communication equipment, the data that collect is delivered on keeper's mobile communication equipment, by mobile communication equipment, Programmable Logic Controller is operated simultaneously.
Design focal point of the present invention is: the present invention adopts intelligentized transmitter, the dissolved oxygen content and the temperature that can be accurately dissolved oxygen probe and temperature sensor probe be detected are sent to data acquisition module, data acquisition module sends data to Programmable Logic Controller, Programmable Logic Controller is connected on a solenoid valve or No. two solenoid valves by signal output module, Programmable Logic Controller is according to dissolved oxygen value and the temperature of actual dissolved oxygen value and temperature and setting, according to certain algorithm, calculate corresponding control signal, signal output module is sent to control signal on proportion magnetic valve.When actual dissolved oxygen DO is lower than setting value, forward is controlled and is started, and control signal will be sent on a solenoid valve, and now this valve passes in water oxygen-nitrogen mixture body according to the aperture of control signal size adjustment valve, and dissolved oxygen content starts to rise; When actual dissolved oxygen value is higher than setting value, oppositely to control and start, control signal will be sent on No. two solenoid valves, and now this valve passes in water nitrogen according to the aperture of control signal size adjustment valve, and dissolved oxygen content starts to decline.The algorithm adopting in Programmable Logic Controller of the present invention limits the output area of control signal, and rationally regulates the time scale of its break-make, can effectively solve hysteresis quality and the unbalanced victory of forward and reverse control procedure of controlled system.
The above, it is only preferred embodiment of the present invention, not technical scope of the present invention is imposed any restrictions, therefore every foundation technical spirit of the present invention is to any trickle modification made for any of the above embodiments, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (7)
1. an oxygen in water intelligent control system, is characterized in that: include power module, data acquisition module, Programmable Logic Controller, signal output module, tank and be installed on the transmitter on tank;
This power module is for providing power supply to whole system;
This tank bottom is provided with air intake opening and water delivering orifice, and this tank top is provided with exhausr port, and this exhausr port is provided with exhaust apparatus, and this air intake opening is divided into two-way and is connected with respectively a solenoid valve and No. two solenoid valves, and this water delivering orifice is connected with a mixing pump;
This transmitter includes:
Dissolved oxygen probe, for gathering the dissolved oxygen DO signal of water body;
Temp probe, for gathering the temperature signal of water body; Exciting signal source, for providing voltage excitation signals and providing current excitation signal to described temp probe to described dissolved oxygen probe;
Signal condition module, generates dissolved oxygen DO voltage signal for described dissolved oxygen DO signal being converted to voltage signal and this voltage signal being amplified to process, and described temperature signal is amplified and processes generation temperature voltage signal;
Transmitter electrical form TEDS storer, for storing TEDS parameter, described TEDS parameter comprises channel information and the compensation for calibrating errors parameter that meets IEEE1451.2 standard; Microcontroller, for described dissolved oxygen DO voltage signal and temperature voltage signal are carried out to dissolved oxygen DO voltage signal and the temperature voltage signal of analog digital conversion process generating digital, and according to described channel information and compensation for calibrating errors parameter, digitized dissolved oxygen DO voltage signal and temperature voltage signal are carried out to computing generation dissolved oxygen content and temperature;
Bus interface module, the dissolved oxygen content and the temperature that for exporting described microcontroller, generate;
This mixing pump is provided with two and exports and be divided into two-way, and a road directly flow back in tank, and dissolved oxygen probe and temp probe are housed in addition on the way;
This transmitter bus interface module is sent to data acquisition module by dissolved oxygen content and temperature, data acquisition module sends data to Programmable Logic Controller, and the output terminal of Programmable Logic Controller is connected on a solenoid valve or No. two solenoid valves by signal output module.
2. a kind of oxygen in water intelligent control system according to claim 1, is characterized in that:
The outer setting of described dissolved oxygen probe has the dissolved oxygen probe protective sleeve with dissolved oxygen probe protective sleeve filter screen.
3. a kind of oxygen in water intelligent control system according to claim 1, it is characterized in that: described exciting signal source, signal condition module, TEDS storer, power module and bus interface module are integrated on Transmitter Line plate, described Transmitter Line plate is sealed in the terminal box shell that degree of protection is IP68.
4. a kind of oxygen in water intelligent control system according to claim 1, is characterized in that: described exciting signal source is polarisation voltage source, for providing polarizing voltage to described dissolved oxygen probe.
5. a kind of oxygen in water intelligent control system according to claim 1, is characterized in that: described signal condition module includes:
Current conversion amplifying circuit, generates described dissolved oxygen DO voltage signal for described dissolved oxygen DO signal being converted to voltage signal and this voltage signal being amplified to process;
Filter amplification circuit, generates temperature voltage signal for described temperature signal being amplified process.
6. a kind of oxygen in water intelligent control system according to claim 1, is characterized in that: described bus interface module adopts RS485 bus interface, and described bus interface module is supported IEEE1451.2 standard in agreement.
7. a kind of oxygen in water intelligent control system according to claim 1, it is characterized in that: described Programmable Logic Controller is provided with wireless communication module, by this wireless communication module, be connected with mobile communication equipment, the data that collect are delivered on keeper's mobile communication equipment, by mobile communication equipment, Programmable Logic Controller are operated simultaneously.
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| CN201310633794.0A CN103645652A (en) | 2013-11-30 | 2013-11-30 | Intelligent in-water dissolved oxygen control system |
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| CN201310633794.0A CN103645652A (en) | 2013-11-30 | 2013-11-30 | Intelligent in-water dissolved oxygen control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104731120A (en) * | 2014-10-22 | 2015-06-24 | 中山欧麦克仪器设备有限公司 | Novel dissolved oxygen control device |
| CN104925937A (en) * | 2015-07-10 | 2015-09-23 | 深圳市五大湖新概念环保科技有限公司 | Pressure type over-saturated dissolved oxygen generating device |
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| CN101362616A (en) * | 2008-08-01 | 2009-02-11 | 中国科学院金属研究所 | System for accurately controlling dissolved oxygen content in water and use thereof |
| CN101533031A (en) * | 2009-04-15 | 2009-09-16 | 中国农业大学 | Dissolved oxygen intelligent transducer |
| CN102937637A (en) * | 2012-10-22 | 2013-02-20 | 中国环境科学研究院 | Water body experiment apparatus and method |
| CN203164636U (en) * | 2013-04-15 | 2013-08-28 | 贺兰县新明水产养殖有限公司 | Intelligent fish farming equipment remotely controlled by mobile phone short messages |
| CN203217290U (en) * | 2013-04-16 | 2013-09-25 | 李超 | Multifunctional aquarium controller |
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2013
- 2013-11-30 CN CN201310633794.0A patent/CN103645652A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362616A (en) * | 2008-08-01 | 2009-02-11 | 中国科学院金属研究所 | System for accurately controlling dissolved oxygen content in water and use thereof |
| CN101533031A (en) * | 2009-04-15 | 2009-09-16 | 中国农业大学 | Dissolved oxygen intelligent transducer |
| CN102937637A (en) * | 2012-10-22 | 2013-02-20 | 中国环境科学研究院 | Water body experiment apparatus and method |
| CN203164636U (en) * | 2013-04-15 | 2013-08-28 | 贺兰县新明水产养殖有限公司 | Intelligent fish farming equipment remotely controlled by mobile phone short messages |
| CN203217290U (en) * | 2013-04-16 | 2013-09-25 | 李超 | Multifunctional aquarium controller |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104731120A (en) * | 2014-10-22 | 2015-06-24 | 中山欧麦克仪器设备有限公司 | Novel dissolved oxygen control device |
| CN104925937A (en) * | 2015-07-10 | 2015-09-23 | 深圳市五大湖新概念环保科技有限公司 | Pressure type over-saturated dissolved oxygen generating device |
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Application publication date: 20140319 |