CN105370959B - A kind of method and device of adjustment valve nonlinearity - Google Patents
A kind of method and device of adjustment valve nonlinearity Download PDFInfo
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- CN105370959B CN105370959B CN201510989188.1A CN201510989188A CN105370959B CN 105370959 B CN105370959 B CN 105370959B CN 201510989188 A CN201510989188 A CN 201510989188A CN 105370959 B CN105370959 B CN 105370959B
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- 230000010354 integration Effects 0.000 claims abstract description 53
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 description 5
- 230000006870 function Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/0041—Electrical or magnetic means for measuring valve parameters
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Feedback Control In General (AREA)
Abstract
The invention discloses a kind of devices of adjustment valve nonlinearity, are based on PID control system, including：Opening amount signal acquiring unit, the opening amount signal for obtaining valve to be controlled；First primary quantity acquiring unit, the initial input amount for obtaining PID control system；Switch unit, for corresponding channel to be connected according to the opening amount signal of valve to be controlled；Pi element, under the triggering of switch unit, the corresponding adjustment signal of initial input amount to be exported in corresponding channel；Converting unit is converted to the valve opening instruction of PID control system for that will adjust signal；Wherein, ratio subdivision includes at least two kinds of proportional integration modules, the quantity at least two in channel.Therefore the unstability that process is controlled caused by valve nonlinearity can be accordingly adjusted in the present invention according to valve opening signal.In addition, invention additionally discloses a kind of methods of adjustment valve nonlinearity.
Description
Technical field
The present invention relates to technical field of electricity, more particularly to a kind of method and device of adjustment valve nonlinearity.
Background technology
In some industrial productions such as thermal power plant, the equipment of the sizes such as control water, vapour, wind is called regulating valve, this adjusting
Valve is typically all to control the size of rate-of flow by automatically controlling.But in actually controlling, not due to the valve linearity
It is good, for different valve openings, different automatic pid parameters is needed to control, therefore, if using same set of automatic PID
Parameter can cause unstability during control, and control characteristic is poor, cannot be satisfied the requirement of automatic control system.
It can be seen that how to realize that the adjustment of valve nonlinearity with the requirement for meeting automatic control system is this field skill
Art personnel's urgent problem to be solved.
Invention content
The object of the present invention is to provide a kind of devices of adjustment valve nonlinearity, for realizing the tune of valve nonlinearity
It is whole to meet the requirement of automatic control system.In addition, the purpose of the present invention also provides a kind of method of adjustment valve nonlinearity.
In order to solve the above technical problems, the present invention provides a kind of device of adjustment valve nonlinearity, it is based on PID control system
System, including：
Opening amount signal acquiring unit, the opening amount signal for obtaining valve to be controlled；
First primary quantity acquiring unit, the initial input amount for obtaining the PID control system；
Switch unit, for corresponding channel to be connected according to the opening amount signal of the valve to be controlled；
Pi element, under the triggering of the switch unit, the initial input to be exported in corresponding channel
Measure corresponding adjustment signal；
Converting unit, the valve opening for the adjustment signal to be converted to the PID control system instruct；
Wherein, the ratio subdivision includes at least two kinds of proportional integration modules, the quantity at least two in the channel.
Preferably, the switch unit includes：
First handover module is used in the case where the opening amount signal of the valve to be controlled meets the first preset condition,
First passage is connected；
Second handover module is used in the case where the opening amount signal of the valve to be controlled meets the second preset condition,
Second channel is connected；
Wherein, the channel includes first passage and second channel.
Preferably, the pi element includes the first proportional integration module, the second proportional integration module and third ratio
Example integration module；
Wherein, the first proportional integration module is used under the triggering of first handover module, logical described first
Road exports the corresponding adjustment signal of the primary quantity；
The second proportional integration module is used under the triggering of second handover module, is exported in the second channel
The corresponding adjustment signal of the primary quantity；
Or the third proportional integration module is used under the triggering of second handover module, it is defeated in the second channel
Go out the corresponding adjustment signal of the primary quantity.
Preferably, first preset condition be the valve to be controlled the corresponding valve opening of opening amount signal ranging from
30%-60%.
Preferably, second preset condition is that the corresponding valve opening of opening amount signal of the valve to be controlled is less than
30% or be more than 60%.
Preferably, when the valve opening is less than 30%, the second proportional integration module described second for cutting
Under the triggering for changing the mold block, the corresponding adjustment signal of the primary quantity is exported in the second channel；
When the valve opening is less than 60%, the third proportional integration module is used in second handover module
Under triggering, the corresponding adjustment signal of the primary quantity is exported in the second channel.
Preferably, further include instruction execution unit, for controlling the valve to be controlled according to valve opening instruction.
Preferably, further include control unit, for control the first proportional integration module, the second proportional integration module and
Third proportional integration module is in effective status.
Preferably, further include the second primary quantity acquiring unit being mutually redundant with the first primary quantity acquiring unit；
Wherein, under normal circumstances, the first primary quantity acquiring unit work, abnormal when occurring, described first is initial
When measuring acquiring unit failure, the second primary quantity acquiring unit is used to obtain the initial input amount of the PID control system.
A method of adjustment valve nonlinearity is based on PID control system, including：
Obtain the opening amount signal of valve to be controlled and the initial input amount of the PID control system；
Corresponding channel is connected according to the opening amount signal of the valve to be controlled；
Under the triggering of the switch unit, the corresponding adjustment signal of the initial input amount is exported in corresponding channel；
The adjustment signal is converted to the valve opening instruction of the PID control system.
The device of adjustment valve nonlinearity provided by the present invention, switch unit according to different valve opening signals,
Corresponding channel is connected and triggers pi element and exports the corresponding adjustment signal of initial input amount in corresponding channel, by
Two kinds of proportional integration modules are included at least in pi element, therefore can accordingly be adjusted according to valve opening signal in the present invention
The whole unstability that process is controlled caused by valve nonlinearity.
Description of the drawings
In order to illustrate the embodiments of the present invention more clearly, attached drawing needed in the embodiment will be done simply below
It introduces, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ordinary skill people
For member, without creative efforts, other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of structure chart of the device of adjustment valve nonlinearity provided by the invention；
Fig. 2 is the structure chart of another device for adjusting valve nonlinearity provided by the invention；
Fig. 3 is the flow chart of another method for adjusting valve nonlinearity provided by the invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole embodiments.Based on this
Embodiment in invention, without making creative work, what is obtained is every other by those of ordinary skill in the art
Embodiment belongs to the scope of the present invention.
Core of the invention is to provide a kind of method and device of adjustment valve nonlinearity.
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Embodiment one
Fig. 1 is a kind of structure chart of the device of adjustment valve nonlinearity provided by the invention.As shown in Figure 1, adjustment valve
The device of door nonlinearity is based on PID control system, including：
Opening amount signal acquiring unit 10, the opening amount signal for obtaining valve to be controlled；
First primary quantity acquiring unit 11, the initial input amount for obtaining PID control system；
Switch unit 12, for corresponding channel to be connected according to the opening amount signal of valve to be controlled；
Pi element 13, under the triggering of switch unit, output initial input amount to correspond in corresponding channel
Adjustment signal；
Converting unit 14 is converted to the valve opening instruction of PID control system for that will adjust signal；
Wherein, ratio subdivision includes at least two kinds of proportional integration modules, the quantity at least two in channel.
In some industrial productions such as thermal power plant, the equipment of the sizes such as control water, vapour, wind is called regulating valve or valve,
This valve is typically all to be automatically controlled by PID control system to control the size of rate-of flow.But it is being embodied
In, since the valve linearity is bad, if using same set of automatic pid parameter, can cause unstable during control
Property.Therefore, in the present invention, corresponding channel is connected according to the aperture difference of valve, here the quantity in channel at least there are two.Than
Example integral unit includes at least two kinds of proportional integration modules, different to be exported initial input amount according to different valve openings
Adjust signal.Switch unit can not only conductive channel, and pi element can also be triggered and execute operation.Then it converts
The valve opening that adjustment signal is converted to PID control system by unit is instructed with control valve according to instruction progress.
It can be seen that the device of adjustment valve nonlinearity provided in this embodiment, switch unit is according to different valves
Opening amount signal is connected corresponding channel and triggers pi element in the corresponding tune of corresponding channel output initial input amount
Entire signal can be according to valve opening in the present invention since pi element includes at least two kinds of proportional integration modules
Signal accordingly adjusts the unstability that process is controlled caused by valve nonlinearity.
Fig. 2 is the structure chart of another device for adjusting valve nonlinearity provided by the invention.As shown in Fig. 2, upper
On the basis of stating embodiment, switch unit 12 includes：
First handover module 120, in the case where the opening amount signal of valve to be controlled meets the first preset condition, leading
Logical first passage；
Second handover module 121, in the case where the opening amount signal of valve to be controlled meets the second preset condition, leading
Logical second channel；
Wherein, channel includes first passage and second channel.
In specific implementation, switch unit may include two modules, corresponding switching condition also there are two, i.e., first is pre-
If condition and the second preset condition.When the opening amount signal of valve to be controlled meets the first preset condition, then the first handover module is led
Logical first passage；When the opening amount signal of valve to be controlled meets the second preset condition, then second channel is connected in the second handover module.
Wherein, as shown in Fig. 2, on the basis of the above embodiments, pi element 13 includes the first proportional integration mould
Block 130, the second proportional integration module 131 and third proportional integration module 132；
Wherein, the first proportional integration module 130 is used under the triggering of the first handover module 120, is exported in first passage
The corresponding adjustment signal of primary quantity；
Second proportional integration module 131 is used under the triggering of the second handover module 121, and primary quantity is exported in second channel
Corresponding adjustment signal；
Or third proportional integration module 131 is used under the triggering of the second handover module 121, it is initial in second channel output
Measure corresponding adjustment signal.
Specific implementation process is exactly, after switch unit receives the opening amount signal of valve to be controlled, if valve to be controlled
The opening amount signal of door meets the first preset condition, then first passage is connected in the first handover module, and the first proportional integration module is the
Under the triggering of one handover module, in the corresponding adjustment signal of first passage output primary quantity.
If the opening amount signal of valve to be controlled meets the second preset condition, second channel is connected in the second handover module,
Second proportional integration module will export the corresponding adjustment signal of primary quantity under the triggering of the second handover module in second channel；
Or second handover module second channel is connected, third proportional integration module is logical second under the triggering of the second handover module
Road exports the corresponding adjustment signal of primary quantity.
Wherein, the first preset condition is the corresponding valve opening of the opening amount signal ranging from 30%-60% of valve to be controlled.
As the corresponding valve opening ranging from 30%-60% of the opening amount signal of valve to be controlled, then the first handover module
First passage is connected, the first proportional integration module corresponds under the triggering of the first handover module in first passage output primary quantity
Adjustment signal.
Wherein, the second preset condition is that the corresponding valve opening of opening amount signal of valve to be controlled is less than 30% or is more than
60%.
Preferably, when valve opening is less than 30%, the second proportional integration module 131 is used in the second handover module 121
Triggering under, in the corresponding adjustment signal of second channel output primary quantity；
When valve opening is less than 60%, third proportional integration module 132 is used for the triggering in the second handover module 121
Under, in the corresponding adjustment signal of second channel output primary quantity.
When the corresponding valve opening of the opening amount signal of valve to be controlled is ranging from less than 30%, then the second handover module is led
Logical second channel, the second proportional integration module are corresponding in second channel output primary quantity under the triggering of the second handover module
Adjust signal；
When the corresponding valve opening of the opening amount signal of valve to be controlled is ranging from more than 60%, then the second handover module is led
Logical second channel, third proportional integration module are corresponding in second channel output primary quantity under the triggering of the second handover module
Adjust signal.
Wherein, as shown in Fig. 2, further including instruction execution unit 15, for controlling valve to be controlled according to valve opening instruction
Door.
After converting unit 14, which will adjust signal, is converted to the valve opening instruction of PID control system, instruction execution unit
15, just according to the corresponding operation of valve opening instruction execution, are instructed according to valve opening with control valve and are opened.
Wherein, further include control unit 16, for controlling the first proportional integration module 130, the second proportional integration module 131
It is in effective status with third proportional integration module 132.
In specific implementation, control unit and the first proportional integration module, the second proportional integration module and third ratio are accumulated
Sub-module is all connected with.The effect of control unit is accumulated to the first proportional integration module, the second proportional integration module and third ratio
Sub-module controls signal so that the first proportional integration module, the second proportional integration module and third proportional integration module, which are in, to be had
Effect state.
Wherein, as shown in Fig. 2, further including that the second primary quantity being mutually redundant with the first primary quantity acquiring unit 11 obtains list
Member 17；
Wherein, under normal circumstances, the first primary quantity acquiring unit work, abnormal when occurring, described first is initial
When measuring acquiring unit failure, the second primary quantity acquiring unit is used to obtain the initial input amount of the PID control system.
First primary quantity acquiring unit and the second primary quantity acquiring unit are mutually redundant, and under normal circumstances, first is initial
Amount acquiring unit is in normal operating conditions, and the second primary quantity acquiring unit is in preparation state；Once there is exception, first
When primary quantity acquiring unit failure, then the second primary quantity acquiring unit is in working condition by the conversion of preparation state, that is, obtains PID controls
The initial input amount of system processed.
Embodiment two
Fig. 3 is the flow chart of another method for adjusting valve nonlinearity provided by the invention.As shown in figure 3, adjustment
The method of valve nonlinearity is based on PID control system, including：
S10：Obtain the opening amount signal of valve to be controlled and the initial input amount of PID control system；
S11：Corresponding channel is connected according to the opening amount signal of valve to be controlled；
S12：Under the triggering of switch unit, the corresponding adjustment signal of output initial input amount in corresponding channel；
S13：Adjustment signal is converted to the valve opening instruction of PID control system.
It is specific real due to embodiment second is that implementing the embodiment of the corresponding method part of device in embodiment one
The mode of applying refers to the description of embodiment one, and the present embodiment wouldn't repeat.
The method and device of adjustment valve nonlinearity provided by the present invention is described in detail above.Specification
In each embodiment described by the way of progressive, the highlights of each of the examples are it is different from other embodiment it
Locate, just to refer each other for identical similar portion between each embodiment.For the device disclosed in the embodiment, due to itself and reality
Apply that method disclosed in example is corresponding, so description is fairly simple, reference may be made to the description of the method.It should refer to
Go out, it for those skilled in the art, without departing from the principle of the present invention, can also be to the present invention
Some improvement and modification can also be carried out, these improvement and modification are also fallen within the protection scope of the claims of the present invention.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, depends on the specific application and design constraint of technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can directly be held with hardware, processor
The combination of capable software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
Claims (8)
1. a kind of device of adjustment valve nonlinearity, is based on PID control system, which is characterized in that including：
Opening amount signal acquiring unit, the opening amount signal for obtaining valve to be controlled；
First primary quantity acquiring unit, the initial input amount for obtaining the PID control system；
Switch unit, for corresponding channel to be connected according to the opening amount signal of the valve to be controlled；
Pi element, under the triggering of the switch unit, the initial input amount pair to be exported in corresponding channel
The adjustment signal answered；
Converting unit, the valve opening for the adjustment signal to be converted to the PID control system instruct；
It further include the second primary quantity acquiring unit being mutually redundant with the first primary quantity acquiring unit；
Wherein, under normal circumstances, the first primary quantity acquiring unit work, abnormal when occurring, first primary quantity obtains
When taking cell failure, the second primary quantity acquiring unit is used to obtain the initial input amount of the PID control system；
Wherein, the pi element includes at least two kinds of proportional integration modules, the quantity at least two in the channel.
2. the device of adjustment valve nonlinearity according to claim 1, which is characterized in that the channel includes first logical
Road and second channel, the switch unit include：
First handover module, in the case where the opening amount signal of the valve to be controlled meets the first preset condition, being connected
The first passage；
Second handover module, in the case where the opening amount signal of the valve to be controlled meets the second preset condition, being connected
The second channel.
3. the device of adjustment valve nonlinearity according to claim 2, which is characterized in that the pi element packet
Include the first proportional integration module, the second proportional integration module and third proportional integration module；
Wherein, the first proportional integration module is used under the triggering of first handover module, defeated in the first passage
Go out the corresponding adjustment signal of the primary quantity；
The second proportional integration module is used under the triggering of second handover module, described in second channel output
The corresponding adjustment signal of primary quantity；
Or the third proportional integration module is used under the triggering of second handover module, and institute is exported in the second channel
State the corresponding adjustment signal of primary quantity.
4. the device of adjustment valve nonlinearity according to claim 3, which is characterized in that first preset condition is
The corresponding valve opening of the opening amount signal ranging from 30%-60% of the valve to be controlled.
5. the device of adjustment valve nonlinearity according to claim 3, which is characterized in that second preset condition is
The corresponding valve opening of opening amount signal of the valve to be controlled is less than 30% or more than 60%.
6. the device of adjustment valve nonlinearity according to claim 5, which is characterized in that when the valve opening is less than
When 30%, the second proportional integration module is used under the triggering of second handover module, is exported in the second channel
The corresponding adjustment signal of the primary quantity；
When the valve opening is more than 60%, the third proportional integration module is used for the triggering in second handover module
Under, export the corresponding adjustment signal of the primary quantity in the second channel.
7. the device of adjustment valve nonlinearity according to claim 1, which is characterized in that further include instruction execution list
Member, for controlling the valve to be controlled according to valve opening instruction.
8. the device of adjustment valve nonlinearity according to claim 3, which is characterized in that further include control unit, use
It is in effective status in controlling the first proportional integration module, the second proportional integration module and third proportional integration module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510989188.1A CN105370959B (en) | 2015-12-24 | 2015-12-24 | A kind of method and device of adjustment valve nonlinearity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510989188.1A CN105370959B (en) | 2015-12-24 | 2015-12-24 | A kind of method and device of adjustment valve nonlinearity |
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| CN105370959A CN105370959A (en) | 2016-03-02 |
| CN105370959B true CN105370959B (en) | 2018-09-28 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1504662A (en) * | 2002-11-29 | 2004-06-16 | 旺宏电子股份有限公司 | Automatic control method of butterfly control valve and cooling water system applying same |
| CN103307342A (en) * | 2012-03-15 | 2013-09-18 | 冯经娟 | Method for determining a fluid flow rate with a fluid control valve |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101872159A (en) * | 2010-05-13 | 2010-10-27 | 珠海醋酸纤维有限公司 | Temperature and pressure reducer control system and control method thereof |
| US20130068313A1 (en) * | 2011-09-21 | 2013-03-21 | Accutrol, LLC | Electronic Pressure Independent Controller For Fluid Flow Control Valve |
| CN202360852U (en) * | 2011-12-07 | 2012-08-01 | 北京七星华创电子股份有限公司 | High-temperature fluid detection system |
| CN202580178U (en) * | 2012-04-17 | 2012-12-05 | 常州汉腾自动化设备有限公司 | Intelligent pressure-difference regulating balance valve with LCD (liquid crystal display) |
| CN103216659B (en) * | 2013-04-03 | 2015-03-11 | 浙江中易和节能技术有限公司 | Temperature adjusting device with valve self-adaptive function |
| US9447983B2 (en) * | 2013-08-20 | 2016-09-20 | FlowEnergy, L.L.C. | Building energy analysis and management system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1504662A (en) * | 2002-11-29 | 2004-06-16 | 旺宏电子股份有限公司 | Automatic control method of butterfly control valve and cooling water system applying same |
| CN103307342A (en) * | 2012-03-15 | 2013-09-18 | 冯经娟 | Method for determining a fluid flow rate with a fluid control valve |
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