KR101206330B1 - Autonomous positioner and auto-tuning smart valve control system using the same - Google Patents

Autonomous positioner and auto-tuning smart valve control system using the same Download PDF

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Publication number
KR101206330B1
KR101206330B1 KR20100085748A KR20100085748A KR101206330B1 KR 101206330 B1 KR101206330 B1 KR 101206330B1 KR 20100085748 A KR20100085748 A KR 20100085748A KR 20100085748 A KR20100085748 A KR 20100085748A KR 101206330 B1 KR101206330 B1 KR 101206330B1
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South Korea
Prior art keywords
valve
control valve
signal
positioner
control
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KR20100085748A
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Korean (ko)
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KR20120022299A (en
Inventor
김남숙
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주식회사 네오엠앤씨
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Publication of KR20120022299A publication Critical patent/KR20120022299A/en
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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Flow Control (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)

Abstract

The present invention is a self-tuning smart valve control system using an autonomous positioner, there is no need to have an external controller such as PLC or DCS has the advantage of saving installation and maintenance costs, for this purpose is to pass through the pipe installed the control valve A sensor signal processor configured to receive and process a detection signal from a sensor that detects a state of a fluid;
The loop control unit receiving the detection signal from the sensor signal processing unit and performing a calculation for determining a target opening degree value of a control valve is installed in the positioner.

Description

Autonomous positioner and self-tuning smart valve control system using same {AUTONOMOUS POSITIONER AND AUTO-TUNING SMART VALVE CONTROL SYSTEM USING THE SAME}

The present invention relates to an autonomous positioner and a self-tuning smart valve control system using the same. Specifically, a control operation for controlling a valve opening degree by receiving detection signals such as pressure, temperature, and flow rate in the positioner is performed. It includes a controller to perform automatic control of pressure, temperature, flow rate, etc. by autonomously adjusting the valve opening degree without building an external control system such as PLC (Programmable Logic Controller) or DCS (Distributed Control System). The present invention relates to an autonomous positioner and a self-tuning smart valve control system using the same.

In general, the positioner 40 used for the control valve 10 is a device for adjusting the opening degree by driving the valve according to a control command calculated by an external controller 20 such as a PLC or a DCS.

As shown in FIG. 1, the PLC or DCS receives a detection signal from a process sensor 30 such as a temperature sensor, a pressure sensor, a flow sensor, and performs calculations in a loop controller (PID control) inside the PLC or DCS. The resulting valve opening also sends a request signal to the positioner 40.

Then, the positioner 40 is configured to adjust the opening degree of the control valve 10 according to the valve opening degree request signal transmitted from the loop controller of the PLC or DCS and transmit the result back to the PLC or DCS.

In the valve control system using the conventional positioner 40 configured as described above, as shown in FIG. 1, a loop controller is installed in an external controller 20 such as a PLC or a DCS, and detects a detection signal by the process sensor 30. Since the sensor signal processing unit is also installed in an external controller 20 such as a PLC or a DCS, an external controller such as a PLC or a DCS is essential, which requires a lot of installation cost, complicated wiring, and maintenance and repair. There was a costly issue.

In order to solve the above problems, the present invention is to provide an autonomous positioner and a self-tuning smart valve control system using the same that does not need to place an external controller, such as PLC or DCS, saving installation and maintenance costs. The purpose is.

In addition, the present invention does not require a control valve and an external controller such as a PLC or a DCS installed at a long distance, and the process sensor is also directly connected to a positioner located at a relatively short distance, so that the wiring structure is not complicated, thereby making the system simple and inexpensive. An object of the present invention is to provide an autonomous positioner capable of self-aligning and a self-tuning smart valve control system using the same.

In addition, an object of the present invention is to provide a self-tuning smart valve control system using an autonomous positioner that can monitor the state of the control valve, the positioner operating state, and the process control result even in a remote location.

As a means for solving the above problems, the autonomous positioner of the present invention,

A sensor signal processing unit for receiving and processing a detection signal from a process sensor for detecting a state of a fluid passing through a pipe provided with a control valve;

The loop control unit is configured to receive the detection signal from the sensor signal processing unit and perform a calculation for determining a required opening amount of a control valve.

In addition, the present invention is further provided with an LCD display for inputting the control valve opening amount target data, confirming the control state,

The loop controller is configured to determine a required opening amount of a control valve by performing calculation by reflecting the opening amount target data and the detection data input from the sensor signal processing unit.

In addition, the present invention is composed of a self-tuning smart valve control system using the autonomous positioner.

In addition, the self-tuning smart valve control system using the autonomous positioner of the present invention is installed remotely from the control valve, and further comprises a monitoring display for inputting the control valve opening amount target data, and confirming the control state.

Through the above problem solving means, the present inventors autonomous positioner and self-tuning smart valve control system using the same, the sensor signal processing unit for receiving the detection signal from the process sensor in the positioner itself and a loop controller for performing the operation control Since the process can be controlled by autonomously adjusting the valve opening without an external controller such as PLC or DCS, installation cost is reduced, process control convenience is increased through valve control, wiring complexity is reduced, and maintenance is possible. There is an advantage that the cost of repair is significantly reduced.

In addition, the present invention has the advantage of easy maintenance because it provides a monitor display unit for the computer to monitor the state of the valve, the operation state of the positioner, the process control results even at a remote location.

1 is a view showing the configuration of a valve control system using a positioner according to the prior art.
Figure 2 is a block diagram of the present inventors autonomous positioner and self-tuning smart valve control system using the same.

Preferred embodiments of the present inventors autonomous positioner and a self-tuning smart valve control system using the same will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a self-tuning smart valve control system using the present inventors autonomous positioner.

As shown in FIG. 2, the present inventors autonomous positioner and a self-tuning smart valve control system using the same include a process sensor 30, a control valve 10, and a positioner 40.

First, the process sensor 30 of the present invention is a sensor for detecting a state of a fluid flowing through a pipe in which the control valve 10 is installed, and various sensors such as a temperature sensor, a pressure sensor, a flow sensor, and the like are used according to a process control object. Can be.

In addition, the control valve 10 is a device for controlling the flow rate of the fluid passing through the control valve 10 by adjusting the opening degree according to the signal detected from the process sensor, various types of valves used in the prior art are used as it is. Can be.

The following describes positioner 40, which is a major feature of the present invention.

In the present invention, the positioner 40 includes a valve opening signal processor 41, a sensor signal processor 42, a signal converter 43, a microprocessor 44, a valve driver 45, a power supply 46, and an LCD display. 47 is provided.

First, the valve opening signal processing section 41 is a portion which is provided in the control valve 10 to which the detection signal transmitted from the valve opening detection means for detecting the opening degree of the control valve 10 is input. .

In addition, the sensor signal processor 42 is a part to which a detection signal regarding pressure, temperature, flow rate, etc. detected from various process sensors 30 such as the above-described pressure sensor, temperature sensor, and flow sensor is input.

Next, the signal converting unit 43 receives an analog signal which is a detection signal input to the valve opening signal processing unit 41 and the sensor signal processing unit 42 by a call command from the microprocessor 44 which will be described later. Is converted to and transmitted to the microprocessor 44.

In addition, the microprocessor 44 is a part for processing the signal input from the signal conversion unit 43, by the control valve opening amount data and the sensor is converted into a digital signal transmitted from the signal conversion unit 43 by the sensor And a loop controller 60 for performing an operation for controlling the control valve 10 from the detected data.

In particular, the loop control unit 60 is the opening amount data of the control valve 10 to be transmitted and the detection data such as the measured temperature, pressure, flow rate, and the like, the opening amount target which is a set value of the stored or input temperature, pressure, flow rate, etc. The calculation is performed by the stored software reflecting the data to calculate and determine the required opening amount data of the control valve 10.

In addition, the valve driver 45 receives the data calculated by the microprocessor 44, that is, the required opening amount data from the microprocessor 44 to adjust the opening amount of the control valve 10 as described above. As a part for generating power, the valve driving portion 45 directly changes the opening degree of the valve by the required opening amount, so that the opening degree of the control valve 10 is adjusted.

Next, the power supply 46 is a portion for supplying the power required for the positioner 40.

In addition, the LCD display 47 inputs a set value (set value) for controlling the control valve 10, that is, the opening amount target data, or visually enables the operator to check the operation control result by the microprocessor 44. The device is displayed as.

In addition to the above-described configuration, the positioner 40 of the present invention may further include a valve opening amount transmission unit 48, a communication unit 49, and a valve opening request signal processing unit 50.

In this regard, first, the valve opening amount transmission unit 48 is a device provided separately for transmitting the opening amount of the control valve 10 to an external device, and may be installed inside the positioner 40, and the communication unit ( 49 is a device installed in the positioner 40 to communicate with the monitoring display unit 51 to be described later, which is installed at a remote location. It is configured to transmit and, in some cases, also receive necessary data.

In addition, the valve opening degree request signal processing unit 50 is configured to be selectively installed when necessary, and is an input storage unit capable of receiving and processing a control signal from a controller such as the external controller 20 as in the conventional positioner 40. It may be connected to the signal conversion unit 43.

In addition, one of the other features of the present invention is to include a monitor display unit (51).

The monitor display unit 51 may be a touch screen or the like in one form of a graphical user interface (GUI), and may be installed at a distance from the control valve 10 to display a control result of the positioner 40 or to control the valve. It is preferably configured to receive a set value for the control of (10), that is, the opening amount target data, and is connected to the communication unit 49.

Through such a configuration, the present invention enables the control of the control valve 10 only by the positioner 40 in which the loop controller 60 is inherently without a bulky and complicated external controller such as PLC or DCS. There is no need for complicated wiring between the external controller 20 and the external controller 20, and the process sensor 30 is also directly connected to the positioner 40 so that the installation is not expensive and the maintenance is simplified. do.

The operating process of the present invention configured as described above will be described in detail.

First, the sensor signal processing unit 42 receiving the detection signal from the process sensor 30 receives the detection signals input from the various process sensors 30, and the valve opening signal processing unit 41 controls the opening amount of the valve. Receive a detection signal.

Then, the signal converting unit 43 receives the detection signals from the sensor signal processing unit 42 and the valve opening signal processing unit 41 according to the call command of the microprocessor 44 to convert the analog signals into digital signals. .

The converted digital detection signal is transmitted to the loop control unit 60 implemented by software in the microprocessor, where the detection data by the sensor, the valve opening amount data, and the set value input by the LCD display unit 47 are determined. A comparison operation is performed with the opening amount target data, and as a result of this calculation, the desired control valve required opening amount data is calculated and transmitted to the valve driver 45.

The valve driver 45 converts the transmitted data into a signal capable of operating the control valve 10 to operate the valve driver in the control valve 10, and when the valve opening is adjusted by the valve driver operation, By changing the cross-sectional area, the flow rate flowing in the pipe is changed so that the pressure, temperature or flow rate of the process can be adjusted to a target value.

In addition, the adjusted pressure, temperature, flow rate, and the like are displayed on the LCD display 47 and, if necessary, may be displayed on the monitor display 51 installed at a remote location through the communication unit 49, so that monitoring is performed at various positions. It becomes possible.

On the other hand, the set value (opening amount target data) and P, I, D gain required for the process control are set directly on the LCD display 47 and the remote monitoring display 51, and are inputted as described above. Like the positioner 40, a valve opening request signal processing unit 50 is provided to receive a control signal from an external controller so that data input by the external controller is also possible.

10: control valve 20: (external) controller
30: process sensor 40: positioner
41: valve opening signal processor 42: sensor signal processor
43: signal conversion unit 44: microprocessor
45 valve driving unit 46 power supply unit
47: LCD display part 48: valve opening amount transmission part
49: communication unit 50: valve opening request signal processing unit
51: supervision display unit 60: loop control unit

Claims (4)

A valve opening signal processor which receives a detection signal transmitted from a valve opening degree detecting means for detecting an opening degree of a control valve;
Sensor signal processing unit for receiving the detection signal detected from the process sensor for detecting the state of the fluid passing through the pipe with a control valve,
A signal conversion unit for converting an analog signal, which is a detection signal input to a valve opening signal processing unit and a sensor signal processing unit, into a digital signal by a call command from a microprocessor to be described later, and transmitting the same to a microprocessor;
Processes the signal input from the signal conversion unit, and performs calculation to control the control valve from the control valve opening amount data and the data detected by the process sensor is converted into a digital signal from the signal conversion unit to perform the operation of the control valve A microprocessor having a loop controller for calculating and determining required opening amount data;
A valve driving unit generating power to adjust the opening amount of the control valve by receiving the required opening degree data calculated and calculated from the microprocessor,
A power supply for supplying power to the positioner;
Characterized in that the LCD display unit for inputting the opening amount target data, which is a set value for controlling the control valve, or for visually displaying the operation control result by the microprocessor so that the operator can check
Autonomous positioner
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KR20100085748A 2010-09-01 2010-09-01 Autonomous positioner and auto-tuning smart valve control system using the same KR101206330B1 (en)

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KR20100085748A KR101206330B1 (en) 2010-09-01 2010-09-01 Autonomous positioner and auto-tuning smart valve control system using the same

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101853325B1 (en) * 2016-04-01 2018-05-10 주식회사 코젠 Automatic control valves using the Internet of Things

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112161106A (en) * 2020-09-24 2021-01-01 常州工学院 Control system and control method of valve

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007206936A (en) 2006-02-01 2007-08-16 Ckd Corp Flow rate control system
KR100971995B1 (en) * 2009-10-08 2010-07-23 김태곤 Apparatus for automatically reducing pressure of water supply

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007206936A (en) 2006-02-01 2007-08-16 Ckd Corp Flow rate control system
KR100971995B1 (en) * 2009-10-08 2010-07-23 김태곤 Apparatus for automatically reducing pressure of water supply

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101853325B1 (en) * 2016-04-01 2018-05-10 주식회사 코젠 Automatic control valves using the Internet of Things

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