CN108469848B - Pressure control method and system based on electromagnetic valve group - Google Patents
Pressure control method and system based on electromagnetic valve group Download PDFInfo
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
- G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
- G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
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Abstract
The invention provides a pressure control method and a system based on an electromagnetic valve group, wherein the method comprises the following steps of S10, obtaining a pressure correction value; step S20, according to the pressure correction value, the current valve position value is adjusted; step S30, according to the current valve position value, controlling and adjusting the cross section area of the exhaust passage, and executing step S10. The system includes a controller. According to the invention, the exhaust pressure is regulated by introducing the pressure change rate and the valve position, so that the purpose of more accurate and stable exhaust pressure regulation is realized.
Description
Technical Field
The invention relates to the technical field of pressure control, in particular to a pressure control method and system based on an electromagnetic valve group.
Background
The exhaust pressure regulation in the industrial field is quite common, and the use of the electromagnetic valve group to regulate the exhaust pressure is a method with simple structure and convenient use. It is common practice to control the pressure inside a pressure vessel (e.g., a combustion chamber or a reaction vessel) to be stabilized within a certain range by detecting a pressure value and adjusting the sectional area of an exhaust passage by a combination of solenoid valve switches in a solenoid valve block. However, the use of solenoid valve group regulation is prone to problems of insufficient pressure control, frequent solenoid valve opening and closing, and thus, an impact on service life.
Aiming at the situation, the application provides a technical scheme for solving the technical problems.
Disclosure of Invention
The invention aims to provide a pressure control method and a pressure control system based on an electromagnetic valve group, which are used for adjusting the exhaust pressure by introducing the pressure change rate and the valve position, so that the exhaust pressure is adjusted more accurately and stably.
The technical scheme provided by the invention is as follows:
a pressure control method based on an electromagnetic valve group comprises the following steps: step S10, obtaining a pressure correction value; step S20, according to the pressure correction value, the current valve position value is adjusted; step S30, according to the current valve position value, controlling and adjusting the cross section area of the exhaust passage, and executing step S10.
Preferably, step S10 specifically includes: step S11, obtaining a pressure actual value; step S12 calculates the pressure correction value based on the actual pressure value.
Preferably, the calculating the pressure correction value in step S12 specifically includes: calculating the pressure correction value by the following algorithm:where q (T) is a pressure correction value, p (T) is a pressure actual value, p (T-1) is a pressure actual value of the previous sampling period, T is a sampling period, and k is a coefficient.
Preferably, step S10 further includes, before: step S01, obtaining a preset valve position value, and setting the preset valve position value as the current valve position value.
Preferably, step S10 further includes, before: step S02, obtaining a pressure preset value and a pressure precision value; step S03, obtaining a lower limit pressure value and an upper limit pressure value according to the pressure preset value and the pressure precision value; step S04 is to divide a plurality of preset pressure intervals according to the lower limit pressure value and the upper limit pressure value.
Preferably, step S20 specifically includes: step S21, when the pressure correction value is increased from one preset pressure interval to an adjacent preset pressure interval, the current valve position value is correspondingly increased by a preset stepping value; step S22, when the pressure correction value decreases from one preset pressure interval to an adjacent preset pressure interval, the current valve position value is correspondingly decreased by one preset step value.
Preferably, step S20 further includes: step S23, when the pressure correction value is larger than the upper limit pressure value, the current valve position value is correspondingly increased by one preset step value every time a preset time passes; step S24, when the pressure correction value is smaller than the lower limit pressure value, the current valve position value is correspondingly reduced by one preset step value every time the preset time passes.
Preferably, step S30 specifically includes: step S31, controlling and adjusting the state of a corresponding electromagnetic valve in the electromagnetic valve group according to the current valve position value; step S32, controlling and adjusting the cross-sectional area of the exhaust passage according to the state of the corresponding solenoid valve in the solenoid valve group, and executing step S10.
The invention also provides a pressure control system based on the electromagnetic valve group, which applies the pressure control method based on the electromagnetic valve group, and the system comprises the following components: a controller; the controller is used for obtaining the pressure correction value, adjusting the current valve position value according to the pressure correction value, and controlling and adjusting the sectional area of the exhaust passage according to the current valve position value.
Preferably, the method further comprises: sensor and electromagnetic valve group; the sensor and the electromagnetic valve group are respectively in communication connection with the controller; the sensor is used for acquiring the actual pressure value and sending the actual pressure value to the controller; the controller is further used for controlling and adjusting the state of the corresponding electromagnetic valve in the electromagnetic valve group according to the current valve position value.
The pressure control method and the pressure control system based on the electromagnetic valve group provided by the invention can bring at least one of the following beneficial effects:
1. in the invention, the valve position value is adjusted by adopting the pressure correction value, and then the sectional area of the exhaust passage is adjusted according to the valve position value, so that the sectional area of the exhaust passage can respond to the pressure change in advance and quickly, and the exhaust pressure adjustment is more accurate and stable.
2. In the invention, the pressure correction value is obtained by adding the change rate of the pressure actual value to the pressure actual value, namely, the change rate is also used as one of the weighing factors of pressure regulation, so that the time delay caused by links such as data acquisition, software circulation period, execution mechanism delay, communication delay and the like can be reduced or counteracted, and when the pressure change is faster, the switching of the electromagnetic valve can be quickened to reduce the fluctuation of the pressure.
3. In the invention, the pressure control target range is divided into a plurality of sections, and when the pressure value upwards or downwards passes through the adjacent sections, the valve position is correspondingly increased or reduced, so that the sectional area of the exhaust passage is correspondingly increased or reduced, and the accuracy and the stability of the exhaust pressure regulation are further improved.
4. In the invention, the valve position is adopted to control the total opening of the electromagnetic valve group, so as to adjust the sectional area of the exhaust channel, thereby reducing the switching frequency of the electromagnetic valve and prolonging the service life of the electromagnetic valve.
Drawings
The above features, technical features, advantages and implementation manners of a pressure control method and system based on an electromagnetic valve set will be further described in a clear and understandable manner with reference to the accompanying drawings.
FIG. 1 is a flow chart of one embodiment of a solenoid valve block-based pressure control method of the present invention;
FIG. 2 is a flow chart of another embodiment of a solenoid valve block-based pressure control method of the present invention;
FIG. 3 is a flow chart of another embodiment of a solenoid valve block-based pressure control method of the present invention;
FIG. 4 is a schematic diagram of one embodiment of a solenoid valve block based pressure control system of the present invention.
Reference numerals illustrate:
1-a controller; 2-a sensor; 3-electromagnetic valve group.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will explain the specific embodiments of the present invention with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the invention, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.
For the sake of simplicity of the drawing, the parts relevant to the present invention are shown only schematically in the figures, which do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one" case.
The invention provides an embodiment of a pressure control method based on a solenoid valve group, referring to fig. 1, comprising: step S10, obtaining a pressure correction value; step S20, according to the pressure correction value, the current valve position value is adjusted; step S30, according to the current valve position value, controlling and adjusting the cross section area of the exhaust passage, and executing step S10.
Specifically, in this embodiment, the controller calculates the pressure correction value first, then adjusts the valve position value according to the pressure correction value, where the valve position value represents the total opening of the solenoid valve group, and finally converts the valve position value into the on-off state of the solenoid valve group to output so as to control the solenoid valve to adjust the cross-sectional area of the exhaust passage.
In the invention, the valve position value is adjusted by adopting the pressure correction value, and then the sectional area of the exhaust channel is adjusted by controlling the electromagnetic valve according to the switching state output of converting the valve position value into the electromagnetic valve group. The valve position value adjusts the cross section area of the exhaust passage, so that the cross section area of the exhaust passage can respond to pressure change in advance and quickly, and the exhaust pressure adjustment is more accurate and stable.
On the basis of the above embodiment, the present invention further provides an embodiment, referring to fig. 2, step S10 specifically includes: step S11, obtaining a pressure actual value; step S12, calculating the pressure according to the actual pressure valueForce correction value. And calculating the pressure correction value by the following algorithm:where q (T) is a pressure correction value, p (T) is a pressure actual value, p (T-1) is a pressure actual value of the previous sampling period, T is a sampling period, and k is a coefficient.
Specifically, in this embodiment, the actual pressure value is detected by the pressure sensor, and then the actual pressure value and the rate of change of the actual pressure value are added to obtain the pressure correction value. Thus, in addition to taking the actual pressure value as a measurement factor of pressure regulation, the rate of change of the actual pressure value is also taken as one of the measurement factors of pressure regulation, which corresponds to an increase in advance.
In the invention, the pressure correction value is obtained by adding the change rate of the pressure actual value to the pressure actual value, namely, the change rate is also used as one of the weighing factors of pressure regulation, so that the time delay caused by links such as data acquisition, software circulation period, execution mechanism delay, communication delay and the like can be reduced or counteracted, and when the pressure change is faster, the switching of the electromagnetic valve can be quickened to reduce the fluctuation of the pressure.
In another preferred implementation of this embodiment, step S10 further includes: step S01, obtaining a preset valve position value, and setting the preset valve position value as the current valve position value.
Specifically, in this embodiment, the operator may preset an initial valve position value, where the initial valve position value may be from zero, or any value, and the operator may set the initial valve position value according to experience and actual conditions.
On the basis of the above embodiment, the present invention further provides an embodiment, referring to fig. 3, before step S10, further including: step S02, obtaining a pressure preset value and a pressure precision value; step S03, obtaining a lower limit pressure value and an upper limit pressure value according to the pressure preset value and the pressure precision value; step S04 is to divide a plurality of preset pressure intervals according to the lower limit pressure value and the upper limit pressure value.
Specifically, in the present embodiment, the worker needs to set the pressure set value and the pressure accuracy value in advance, thereby determining the pressure control target range and the upper and lower limit pressure values. After the pressure control target range is determined, the range is subdivided into a plurality of cells. Assuming that the pressure set value is set to 1.0MPa and the pressure accuracy value is required to be + -0.1 MPa, the pressure control target range is 0.9-1.1 MPa, the lower limit pressure value is 0.9MPa, and the upper limit pressure value is 1.1MPa. Then dividing the pressure control target range of 0.9-1.1 MPa into 5 sections with 0.04MPa as one section, wherein the sections are respectively as follows: 0.9 to 0.94MPa,0.94 to 0.98MPa,0.98 to 1.02MPa,1.02 to 1.06MPa and 1.06 to 1.1MPa.
In another preferred implementation of this embodiment, step S20 specifically includes: step S21, when the pressure correction value is increased from one preset pressure interval to an adjacent preset pressure interval, the current valve position value is correspondingly increased by a preset stepping value; step S22, when the pressure correction value decreases from one preset pressure interval to an adjacent preset pressure interval, the current valve position value is correspondingly decreased by one preset step value.
Specifically, in this embodiment, the valve position is correspondingly increased by 1 step value when the pressure correction value increases up and every crossing the adjacent pressure interval, and is correspondingly decreased by 1 step value when the pressure correction value decreases down and every crossing the adjacent pressure interval, and remains unchanged when the pressure correction value is within the same pressure interval. For example, based on the assumption of the above embodiment, when the pressure correction value increases from the interval 0.98 to 1.02MPa to the interval 1.02 to 1.06MPa, the current valve position value increases by 1, when the pressure correction value changes within the interval 1.02 to 1.06MPa, the current valve position value remains unchanged, and when the pressure correction value increases again from the interval 1.02 to 1.06MPa to the interval 1.06 to 1.1MPa, the current valve position value increases again by 1; for another example, when the pressure correction value is directly increased from the interval 0.98-1.02 MPa to the interval 1.06-1.1 MPa, the current valve position value is increased by 2 because the interval 0.98-1.02 MPa and the interval 1.06-1.1 MPa are not adjacent two pressure intervals but span the interval 1.02-1.06 MPa in the middle; similarly, when the pressure correction value is reduced from the interval 0.98-1.02 MPa to the interval 0.94-0.98 MPa, the current valve position value is reduced by 1, when the pressure correction value is changed in the interval 0.94-0.98 MPa, the current valve position value is kept unchanged, and when the pressure correction value is reduced from the interval 0.94-0.98 MPa to the interval 0.9-0.94 MPa, the current valve position value is reduced by 1; for another example, when the pressure correction value is directly reduced from the interval 0.98 to 1.02MPa to the interval 0.9 to 0.94MPa, the current valve position value is reduced by 2 because the interval 0.98 to 1.02MPa and the interval 0.9 to 0.94MPa are not adjacent two pressure intervals but also span the interval 0.94 to 0.98MPa in the middle.
In another preferred implementation of this embodiment, step S20 further includes: step S23, when the pressure correction value is larger than the upper limit pressure value, the current valve position value is correspondingly increased by one preset step value every time a preset time passes; step S24, when the pressure correction value is smaller than the lower limit pressure value, the current valve position value is correspondingly reduced by one preset step value every time the preset time passes.
Specifically, in the present embodiment, the valve position value is increased by a step value at a fixed period when the pressure correction value exceeds the upper limit of the control accuracy range, and is decreased by a step value at a fixed period when the pressure correction value exceeds the lower limit of the control accuracy range. For example, based on the assumption of the above embodiment, when the pressure correction value is higher than 1.1MPa, the current valve position value increases by 1 every 1 second; likewise, when the pressure correction value is lower than 0.9MPa, the current valve position is decreased by 1 every 1 second.
In the invention, the pressure control target range is divided into a plurality of sections, and when the pressure value upwards or downwards passes through the adjacent sections, the valve position is correspondingly increased or reduced, so that the sectional area of the exhaust passage is correspondingly increased or reduced, and the accuracy and the stability of the exhaust pressure regulation are further improved.
In another preferred implementation of this embodiment, step S30 specifically includes: step S31, controlling and adjusting the state of a corresponding electromagnetic valve in the electromagnetic valve group according to the current valve position value; step S32, controlling and adjusting the cross-sectional area of the exhaust passage according to the state of the corresponding solenoid valve in the solenoid valve group, and executing step S10.
Specifically, in this embodiment, the valve position value represents the total opening of the electromagnetic valve group, and corresponds to the cross-sectional area of the exhaust passage. The larger the valve position value is, the larger the opening degree of the electromagnetic valve group is, and the larger the exhaust gas amount is, and vice versa. Each 1 unit valve position value corresponds to a unit cross-sectional area of the exhaust passage. Taking an electromagnetic valve group formed by 4 electromagnetic valves as an example, if the exhaust area of each electromagnetic valve is 1:1:1:1, the valve position value of each 1 unit represents the opening of one electromagnetic valve, the total opening of the electromagnetic valve group is 4, and if the exhaust areas of the 4 electromagnetic valves are sequentially 1:2:4: and 8, the valve position value of each 1 unit represents the opening of the minimum electromagnetic valve, and the total opening of the electromagnetic valve group is 15. And converting the valve position value into the total opening of the electromagnetic valve group to control the opening and closing of the electromagnetic valve, and outputting and controlling the opening and closing of the corresponding electromagnetic valve through a relay after the valve position value is converted. Taking the electromagnetic valve group formed by the 4 electromagnetic valves as an example, if the exhaust area of each electromagnetic valve is 1:1:1:1, for example, the valve position value is equal to the number of open solenoid valves, for example, when the valve position value is 3, then 3 solenoid valves are opened and 1 solenoid valve is closed; if the exhaust area of each solenoid valve is 1:2:4:8, converting the valve position value into binary numbers, wherein each bit represents the state of one electromagnetic valve, when the valve position value is 13, converting into binary numbers 1101, opening the electromagnetic valves 1, 3 and 4, and closing the electromagnetic valve 2; if the exhaust area is in other proportions, the conversion is also performed in a proportional relationship.
In the invention, the valve position is adopted to control the total opening of the electromagnetic valve group, so as to adjust the sectional area of the exhaust channel, thereby reducing the switching frequency of the electromagnetic valve and prolonging the service life of the electromagnetic valve.
On the basis of the above embodiments, the present invention also provides an embodiment, as shown with reference to fig. 1 to 3, comprising: step S01, obtaining a preset valve position value, and setting the preset valve position value as the current valve position value; step S02, obtaining a pressure preset value and a pressure precision value; step S03, obtaining a lower limit pressure value and an upper limit pressure value according to the pressure preset value and the pressure precision value; step S04, dividing a plurality of preset pressure intervals according to the lower limit pressure value and the upper limit pressure value; step S11, obtaining a pressure actual value; step S12 is implemented according to the pressureThe actual value is calculated by the following algorithm:wherein q (T) is a pressure correction value, p (T) is a pressure actual value, p (T-1) is a pressure actual value of the previous sampling period, T is a sampling period, and k is a coefficient; step S21, when the pressure correction value is increased from one preset pressure interval to an adjacent preset pressure interval, the current valve position value is correspondingly increased by a preset stepping value; step S22, when the pressure correction value is reduced from one preset pressure interval to an adjacent preset pressure interval, the current valve position value is correspondingly reduced by one preset step value; step S23, when the pressure correction value is larger than the upper limit pressure value, the current valve position value is correspondingly increased by one preset step value every time a preset time passes; step S24, when the pressure correction value is smaller than the lower limit pressure value, the current valve position value is correspondingly reduced by one preset step value every time the preset time passes; step S31, controlling and adjusting the state of a corresponding electromagnetic valve in the electromagnetic valve group according to the current valve position value; step S32, controlling and adjusting the cross-sectional area of the exhaust passage according to the state of the corresponding solenoid valve in the solenoid valve group, and executing step S11.
Specifically, in the present embodiment, a typical application scenario is described as follows:
1. setting the initial valve position value to be 0;
2. setting a pressure set value to be 1MPa, setting a pressure precision value to be +/-0.1 MPa, setting a pressure control target range to be 0.9-1.1 MPa, setting a lower limit pressure value to be 0.9MPa, and setting an upper limit pressure value to be 1.1MPa;
3. the pressure control target range of 0.9-1.1 MPa is divided into 5 sections with 0.04MPa as one section, and the sections are respectively: 0.9 to 0.94MPa,0.94 to 0.98MPa,0.98 to 1.02MPa,1.02 to 1.06MPa, and 1.06 to 1.1MPa;
4. the actual pressure value p (t) is detected by the pressure sensor, and the actual pressure value p (t) is obtained by the formulaCalculating to obtain a pressure correction value q (t);
5. the valve position value is correspondingly increased by 1 when the pressure correction value is increased and every adjacent pressure interval is traversed, the valve position value is correspondingly reduced by 1 when the pressure correction value is reduced and every adjacent pressure interval is traversed, and the valve position value is kept unchanged when the pressure correction value is in the same pressure interval;
6. when the pressure correction value is higher than 1.1MPa, the valve position value is increased by 1 every 1 second, and when the pressure correction value is lower than 0.9MPa, the valve position value is decreased by 1 every 1 second;
7. and converting the valve position value into the on-off state output of the electromagnetic valve group so as to control the electromagnetic valve to adjust the cross section area of the exhaust passage.
The invention also provides a detection system of the pressure control method based on the electromagnetic valve group, referring to fig. 3, comprising: a controller 1; the controller 1 is used for obtaining a pressure correction value, adjusting a current valve position value according to the pressure correction value, and controlling and adjusting the sectional area of the exhaust passage according to the current valve position value. The controller can be an industrial personal computer, a PLC (Programmable Logic Controller, a programmable logic controller), a singlechip and other control equipment. The embodiment is a system embodiment corresponding to the above method embodiment, and specific processes and effects refer to the above method embodiment, which are not described herein in detail.
In another preferred implementation of this embodiment, the method further includes: a sensor 2 and a solenoid valve group 3; the sensor 2 and the electromagnetic valve group 3 are respectively in communication connection with the controller 1; the sensor 2 is used for acquiring the actual value of the pressure and sending the actual value of the pressure to the controller 1; the controller 1 is further configured to control and adjust a state of a corresponding solenoid valve in the solenoid valve group 3 according to the current valve position value. The sensor is a pressure sensor. The electromagnetic valve group consists of a plurality of electromagnetic valves.
According to the invention, the exhaust pressure is regulated by introducing the pressure change rate and the valve position, so that the purpose of more accurate and stable exhaust pressure regulation is realized.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware associated with program instructions, where the foregoing program may be stored in a readable storage medium, and when executed, the program performs steps including the above method embodiments; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.
It should be noted that, the content of information interaction and execution process between the modules in the system and the method embodiment are based on the same concept, and specific content can be referred to the description in the method embodiment of the present invention, which is not repeated here.
It should be noted that the above embodiments can be freely combined as needed. The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (5)
1. The pressure control method based on the electromagnetic valve group is characterized by comprising the following steps of:
step S10, obtaining a pressure correction value; the method specifically comprises the following steps: step S11, obtaining a pressure actual value; step S12, calculating the pressure correction value according to the actual pressure value, and calculating the pressure correction value through the following algorithm:
；
wherein,for the pressure correction value>For the actual value of the pressure +.>As the actual value of the pressure for the last sampling period,for the sampling period +.>Is a coefficient;
the step S10 further includes: step S02, obtaining a pressure preset value and a pressure precision value; step S03, obtaining a lower limit pressure value and an upper limit pressure value according to the pressure preset value and the pressure precision value; step S04, dividing a plurality of preset pressure intervals according to the lower limit pressure value and the upper limit pressure value;
step S20, according to the pressure correction value, the current valve position value is adjusted; the method specifically comprises the following steps: step S21, when the pressure correction value is increased from a preset pressure interval to an adjacent preset pressure interval, the current valve position value is correspondingly increased by a preset stepping value; step S22, when the pressure correction value is reduced from one preset pressure interval to an adjacent preset pressure interval, the current valve position value is correspondingly reduced by one preset step value; step S23, when the pressure correction value is larger than the upper limit pressure value, the current valve position value is correspondingly increased by one preset step value every time a preset time passes; step S24, when the pressure correction value is smaller than the lower limit pressure value, the current valve position value is correspondingly reduced by one preset step value every time the preset time passes;
step S30, according to the current valve position value, controlling and adjusting the cross section area of the exhaust passage, and executing step S10.
2. The solenoid valve group-based pressure control method according to claim 1, further comprising, prior to step S10:
step S01, obtaining a preset valve position value, and setting the preset valve position value as the current valve position value.
3. The pressure control method based on the solenoid valve group according to claim 1, wherein step S30 specifically includes:
step S31, controlling and adjusting the state of a corresponding electromagnetic valve in the electromagnetic valve group according to the current valve position value;
step S32, controlling and adjusting the cross-sectional area of the exhaust passage according to the state of the corresponding solenoid valve in the solenoid valve group, and executing step S10.
4. A solenoid valve group-based pressure control system applying the solenoid valve group-based pressure control method of any one of claims 1-3, comprising: a controller;
the controller is used for obtaining the pressure correction value, adjusting the current valve position value according to the pressure correction value, and controlling and adjusting the sectional area of the exhaust passage according to the current valve position value.
5. The solenoid valve group based pressure control system of claim 4, further comprising: sensor and electromagnetic valve group;
the sensor and the electromagnetic valve group are respectively in communication connection with the controller;
the sensor is used for acquiring the actual pressure value and sending the actual pressure value to the controller;
the controller is further used for controlling and adjusting the state of the corresponding electromagnetic valve in the electromagnetic valve group according to the current valve position value.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08232635A (en) * | 1995-02-24 | 1996-09-10 | Calsonic Corp | Control-type exhaust system |
| US5988765A (en) * | 1996-07-22 | 1999-11-23 | Nabco, Ltd. | Fluid pressure control device |
| CN201027622Y (en) * | 2007-01-31 | 2008-02-27 | 高阳 | Honeycomb pipe type energy-saving supercharger of air compressor |
| CN103115243A (en) * | 2013-02-05 | 2013-05-22 | 中国石油天然气股份有限公司 | Control equipment and method for natural gas pipeline distribution electric control valve |
| CN104316316A (en) * | 2014-08-19 | 2015-01-28 | 盛瑞传动股份有限公司 | Testing method and system of speed changer |
| CN107152551A (en) * | 2017-05-11 | 2017-09-12 | 广东卓信环境科技股份有限公司 | A kind of Regulation Control method and Regulation Control device |
| KR20170121849A (en) * | 2016-04-26 | 2017-11-03 | (주) 티피씨 메카트로닉스 | Electro-Pneumatic Regulator applied difference between the input pressure and the output pressure |
-
2018
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08232635A (en) * | 1995-02-24 | 1996-09-10 | Calsonic Corp | Control-type exhaust system |
| US5988765A (en) * | 1996-07-22 | 1999-11-23 | Nabco, Ltd. | Fluid pressure control device |
| CN201027622Y (en) * | 2007-01-31 | 2008-02-27 | 高阳 | Honeycomb pipe type energy-saving supercharger of air compressor |
| CN103115243A (en) * | 2013-02-05 | 2013-05-22 | 中国石油天然气股份有限公司 | Control equipment and method for natural gas pipeline distribution electric control valve |
| CN104316316A (en) * | 2014-08-19 | 2015-01-28 | 盛瑞传动股份有限公司 | Testing method and system of speed changer |
| KR20170121849A (en) * | 2016-04-26 | 2017-11-03 | (주) 티피씨 메카트로닉스 | Electro-Pneumatic Regulator applied difference between the input pressure and the output pressure |
| CN107152551A (en) * | 2017-05-11 | 2017-09-12 | 广东卓信环境科技股份有限公司 | A kind of Regulation Control method and Regulation Control device |
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