KR102482653B1 - Portable controller for controlling actuator equipped with servo valve and control method therefor - Google Patents

Abstract

The present invention relates to a portable controller, and more particularly, to a portable test device for testing actuators equipped with servo valves used in power plants or industrial sites, and a control method thereof.
The present invention is an actuator 500 including an actuator module 510, an LVDT 520 for detecting a driving state of the actuator module 510, and a servo valve 530 for driving the actuator module 510 As a portable test device 100 for testing, a manipulation and display unit 110 for displaying test results of a user's manipulation and actuator 500; an input/output unit 150 that outputs a control signal for controlling the servo valve 530 and receives a detection signal from the LVDT 520; The LVDT (which is the result of detecting the state of the actuator module 510 driven by the operation of the servo valve 530 controlled by the operation of the servo valve 530 that receives the operation signal input through the operation and display unit 110 ( 520) receives the detection signal, determines whether the actuator 500 operates according to a preset standard, and displays the result on the operation and display unit 110. Disclosed is a portable test device 100 for testing an actuator equipped with.

Description

Portable test device for testing an actuator equipped with a servo valve and its control method {Portable controller for controlling actuator equipped with servo valve and control method therefor}

The present invention relates to a portable controller, and more particularly, to a portable test device for testing actuators equipped with servo valves used in power plants or industrial sites, and a control method thereof.

In general, actuators installed in power plants and industrial sites are inspected through periodic disassembly at valve shops. In order to assemble the disassembled actuator and check the completeness of the assembly, most of the sites do not have a controller that can perform a driving and controllability test at the valve shop.

The assembled actuator does not perform its own performance test at the valve shop, but is installed in the field, and the performance test is performed through a controller that controls the actuator located in the control room.

At this time, the control room and the site where the actuator is located are separated, and the performance test is performed through communication between the control room and the site through remote communication.

When the performance test is completed, in order to perform the mechanical linkage (link) between the actuator and the valve located in the field, the mechanical linkage is performed by manipulating the actuator to open and close it at a specific opening degree. Since it cannot be fixed to a specific location, it is performed through remote communication with the site every time.

However, in the above method, it is difficult to analyze the control room data to check the completeness of the actuator control and assembly state located in the field, and the reality is that the data cannot be precisely analyzed depending on the performance of the controller.

In order to solve the above problems, the present invention provides a portable test apparatus and a control method for testing an actuator capable of controlling an actuator equipped with a servo valve and confirming the completeness of the assembled state in the field.

The present invention was created to achieve the above object of the present invention, and the present invention includes an actuator module 510, an LVDT 520 for detecting a driving state of the actuator module 510, and the actuator module As a portable test apparatus 100 for testing the actuator 500 including the servo valve 530 that drives the 510, the operation and display unit 110 for displaying the test results of the user's operation and actuator 500 )Wow; an input/output unit 150 that outputs a control signal for controlling the servo valve 530 and receives a detection signal from the LVDT 520; The LVDT (which is the result of detecting the state of the actuator module 510 driven by the operation of the servo valve 530 controlled by the operation of the servo valve 530 that receives the operation signal input through the operation and display unit 110 ( 520) receives the detection signal, determines whether the actuator 500 operates according to a preset standard, and displays the result on the operation and display unit 110. Disclosed is a portable test device 100 for testing an actuator equipped with.

A wiring method of the LVDT 520 may have any one of a 3-wire method 410, a 4-wire method 420, a 5-wire method 430, and a 6-wire method 440.

The portable controller 100 transmits signals manipulated by the operation and display unit 110 to the operation control unit 130 and receives all signals through the operation and control unit 130 to display the operation and display unit 110. It may include an interface unit 120 for transmission.

The portable controller 100 has a signal conversion unit 140 that converts signals transmitted and received between the operation control unit 130 and the input/output unit 150 into signals suitable for the operation control unit 130 and the input/output unit 150. ) may be included.

The present invention also discloses a control method of the portable controller 100 having the above configuration, characterized by executing the following modes:

A) The first setting step (S11) of selecting the wiring method of the LVDT (520), the second setting step (S12) of setting the operating current range of the servo valve 530, and the control type of P Controller or PI Controller A setting mode (S10) including a third setting step (S13) of selecting;

B) Completely closed state based on the detection signal of the LVDT 520 by input of the minimum and maximum values of the operating current range of the servo valve 530 set in the setting mode (S10) by the operation control unit 130 and a fully open state, and a calibration mode for calculating quadratic equations (S20);

c) A test of inputting a target value of the actuator 500 by performing the setting mode (S10) and the calibration mode (S20) and testing whether the actuator 500 responds from the detection signal of the LVDT (520) mode (S30);

d) A trend mode (S40) that tracks real-time and time-series changes by storing input values and output values according to the execution of the calibration mode (S20) and the test mode (S30).

The test mode (S30) includes a ramp test for testing whether the actuator 500 follows the target value with a slope input by the user, and whether or not it responds directly to the target value input by the user. At least one of the step tests to be tested may be tested.

On the other hand, the first method according to the present invention for achieving the above object is developed as a small controller composed of main signals for driving and controlling the actuator, and the servo valve and LVDT signals are used to control the actuator with an algorithm for valve control in real time at high speed do. Since the performance of actuators is different depending on the type, it is possible to apply the optimal gain of the actuator by implementing the gain adjustment for controlling the actuator.

The second method according to the present invention for achieving the above object is to display and store data of main electrical signals for controlling actuators at high speed and utilize them for analysis of actuator control states.

In the third method according to the present invention for achieving the above object, the servo valve is applied on the market from a minimum of ±10 mA to a maximum of ±200 mA, and is manufactured by each manufacturer, so that the minimum and maximum current ranges of the servo valve are compatible in the present invention.

In the fourth method according to the present invention for achieving the above object, the LVDT is a 3-wire type 410, 4-wire type 420, 5-wire type 430, or 6-wire type according to the actuator's stroke and manufacture. 440 requires electrical wiring, and the present invention is compatible with four wiring methods.

According to the present invention, it is possible to independently operate and perform performance tests after assembling without using a dedicated actuator controller, and to analyze the control state of the actuator accordingly. As a result, there is an advantage in that overall work time can be shortened by identifying problems in advance before installation on the site and collaborating with a remotely located control room is unnecessary.

In addition, it can be used to suggest a test methodology for immediate action in the field when a problem occurs during actuator operation and a solution due to the actuator's own problem.

In addition, since it is a portable controller that can be easily carried, the time burden for testing in the process is small.

Therefore, the present invention was created in view of the above situation, and the portable controller of the present invention is used in a place where the actuator is located as a main signal linkage for controlling the actuator without the need for an expensive dedicated controller, external power supply, and separate configuration This has the advantage of easily and quickly recognizing and immediately checking problems.

In addition, the main signals for controlling the actuator using the portable controller according to the present invention are stored and data analysis corresponding to the function of the recorder is possible.

In addition, since the servo valve that drives the actuator and the LVDT that senses the position of the actuator have different electrical connections and signal ranges depending on the manufacturer and type, all servo valves and LVDTs have the advantage of being electrically compatible.

1 is a conceptual diagram showing the configuration of a portable controller according to the present invention.
FIG. 2 is a conceptual diagram showing a configuration for controlling and testing an actuator by the portable controller of FIG. 1 .
FIG. 3 is a circuit diagram showing a wiring method of an LVDT installed in an actuator to be controlled by the portable controller of FIG. 1 .
4 is a control schematic diagram showing a control flow by the portable controller of FIG. 1 .
FIG. 5 is a conceptual diagram illustrating a control method by the portable controller of FIG. 1 in a menu structure of possible modes.
FIG. 6 is a conceptual diagram showing a first setting step, a second setting step, and a third setting step of the setting mode of FIG. 5 .

The embodiments described in the present invention and the configurations shown in the drawings are only preferred embodiments of the present invention, and do not represent all the technical ideas of the present invention, so the scope of the present invention is limited to the embodiments and drawings described in the text. should not be construed as being limited by That is, since the embodiment can be changed in various ways and can have various forms, it should be understood that the scope of the present invention includes equivalents capable of realizing the technical idea.

In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only such effects, the scope of the present invention should not be construed as being limited thereto.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless defined otherwise. Terms defined in commonly used dictionaries should be interpreted as being consistent with meanings in the context of related art, and cannot be interpreted as having ideal or excessively formal meanings that are not clearly defined in the present invention.

Hereinafter, a portable test apparatus for testing an actuator equipped with a servo valve according to the present invention and a control method thereof will be described with reference to the accompanying drawings.

First, the portable controller 100 according to the present invention according to the present invention is a controller for controlling the actuator 100 and checking the completeness of the assembled state.

As shown in FIG. 2, the actuator 500 includes an actuator module 510, an LVDT 520 for detecting a driving state of the actuator module 510, and a servo valve for driving the actuator module 510 ( 530).

The actuator module 510 is a module for realizing mechanical motions such as linear driving and rotational driving by driving control of the servo valve 530 to be described later, and various configurations are possible depending on the driving method.

The LVDT 520 is a component for detecting the driving state of the actuator module 510, and as shown in FIG. 3, as suggested in Korean Registered Patent No. KR101542211B1, a three-wire type, a four-wire type, It can be composed of any one of 5-wire and 6-wire.

The servo valve 530 is configured to drive the actuator module 510 by inputting an electrical signal, and various configurations are possible.

The portable controller 100 according to the present invention is a portable test device for testing the actuator 500 described above, and as shown in FIG. 1, the operation and display unit 110, the operation control unit 130, the input and output unit 150) may be included.

The operation and display unit 110 allows the user of the portable controller 100 to set and control the LVDT 520 and the servo valve 530 for driving the actuator 500, and to operate and set the test and calibration mode. As a configuration for the configuration, various configurations are possible.

For example, the manipulation and display unit 110 may be displayed on a display screen provided in the portable controller 100 as a menu configuration 210 as shown in FIG. 5 .

In addition, the operation and display unit 110 can have various configurations, such as an integrated screen for a user operation and a display unit for displaying various data, or separately configured.

In particular, the manipulation and display unit 110 may display an input for a user's manipulation and a test result of the actuator 500 on a display screen.

Meanwhile, an interface unit 120 is installed between the operation and display unit 110 and an operation control unit 130 to be described later.

The interface unit 120 transmits signals manipulated by the operation and display unit 110 to the operation control unit 130, receives all signals through the operation and control unit 130, and transmits them to the operation and display unit 110.

And, the interface unit 120 sets the type of data to be transmitted and received between the operation and display unit 110 and the operation control unit 130 so that the transmission and reception is smooth.

The operation control unit 130 controls the functions of the setting mode (S10), calibration mode (S20), test mode (S30), and trend mode (S40), which will be described later, as well as signal conversion or signal reading that are used internally. As a configuration to implement the functions for the software, it is defined as a circuit configuration rather than a physical configuration.

The input/output unit 150 is composed of input/output terminals, and the input/output terminals are linked to the LVDT 520 and the servo valve 530 mounted on the actuator module 510 used in industrial sites such as power plants.

Specifically, the input/output unit 150 may be configured to output a control signal for controlling the servo valve 530 and receive a detection signal from the LVDT 520 .

Meanwhile, a signal conversion unit 140 is provided for outputting and inputting signals through the input/output unit 150 .

The signal conversion unit 140 converts signals transmitted and received between the operation control unit 130 and the input/output unit 150 into appropriate signals for the operation control unit 130 and the input/output unit 150.

In particular, the signal conversion unit 140 converts a signal input according to the LVDT wiring method of FIG. 3 into a signal that the operation control unit 130 can recognize, and the servo valve with different operating current ranges for each manufacturer and type ( 530) can physically transform the signal.

In addition, the signal conversion unit 140 may generate a voltage applied to the primary coil (primary side) of the LVDT 520 and transmit the generated voltage to the input/output unit 150 .

On the other hand, the operation control unit 130 receives an operation signal input through the operation and display unit 110, and controls the state of the actuator module 510 driven by the operation of the servo valve 530 controlled according to the control signal. By receiving the detection signal of the LVDT 520 , which is the detection result of , it is determined whether the actuator 500 operates according to a preset standard, and the result can be displayed on the operation and display unit 110 .

The portable controller 100 having the configuration as described above is a control method of the portable controller according to the present invention, and includes a setting mode (S10), a calibration mode (S20), a test mode (S30), and a trend mode (shown in FIG. 5). It can be controlled by a control method that performs modes such as S40).

The setting mode (S10) is a mode for setting the LVDT 220 and the servo valve 230, and various configurations are possible according to setting contents.

For example, the setting mode (S10) includes a first setting step (S11) of selecting a wiring method of the LVDT (520), a second setting step (S12) of setting an operating current range of the servo valve 530, and A third setting step (S13) of selecting the control type of the P Controller or PI Controller of FIG. 4 may be included.

Specifically, in the setting mode (S10), first, one of the methods for connecting the LVDT illustrated in FIG. 3 to the input/output unit 150 of the portable controller 100 in relation to the LVDT 220 is set, Second, a current operating range of the servo valve 530 for driving the servo valve 530 is set.

The calibration mode (S20) is based on the detection signal of the LVDT (520) by inputting the minimum and maximum values of the operating current range of the servo valve (530) set in the setting mode (S10) by the operation control unit (130). It can be performed by various methods as a completely closed state, a completely open state, and a mode for calculating a quadratic equation.

Specifically, the calibration mode (S20) means the calibration of the LVDT 520, which is a position sensor of the actuator module 510 that mechanically moves equally and generates an electrical signal as the actuator module 510 is driven, which This function stores the completely closed state of the actuator module 510 as 0% and the completely open state as 100%, and is corrected by a quadratic equation by the two stored signals.

The test mode (S30) inputs the target value of the actuator 500 by performing the setting mode (S10) and the calibration mode (S20) and tests whether the actuator 500 responds from the detection signal of the LVDT (520) As a mode, it can be performed by various methods.

Specifically, in the test mode (S30), when the above-described setting mode (S10) and calibration mode (S20) are completed, the user inputs a desired target value for the actuator 500 to check whether the actuator 500 responds As a function, the actuator 500 is divided into a Ramp Test (inclination test) in which the actuator 500 follows the target value with a slope input by the user, and a Step Test function in which the actuator 500 responds immediately to the target value input by the user.

That is, in the test mode (S30), a slope test for testing whether the actuator 500 follows the target value input by the user as a Ramp signal, and whether the target value input by the user is input as a Step signal, that is, whether or not it responds immediately At least one of the step tests for testing whether

Meanwhile, in performing the test mode (S30), the actuator 500 may be controlled by various control methods by the operation control unit 130.

Specifically, the test mode (S30) may be performed by controlling the actuator 500 by proportional control, proportional-integral control, or the like shown in FIG. 4 .

That is, in the test mode (S30), according to the control method set in the setting mode (S10), a target value is input with a Ramp signal or a Step signal, proportional control, proportional-integral control control), etc.

Meanwhile, according to the test result according to the test mode (S30), it can be used as a reference value for calibration by the calibration mode (S20).

The trend mode (S40) is a mode that tracks real-time and time-sequential changes by storing input values and output values according to the execution of the calibration mode (S20) and the test mode (S30), and can be performed by various methods. .

Specifically, the trend mode (S40) controls the main signal values input and output from the portable controller 100 through the calibration, calibration mode (S20) or test mode (S30) as a real-time and historical trend as a trend. It is possible to check and analyze the presence or absence of the status.

In addition, the trend mode (S40) may include a function of storing historical data for detailed analysis of input/output signal data linked to the portable controller 100 to another storage medium.

The present invention relates to a portable controller equipped with a servo valve and a control method thereof, which can directly drive and control an actuator equipped with a servo valve and an LVDT used in a power plant or industrial site using a portable controller in the field. , It is to apply a portable controller for controlling an actuator equipped with a servo valve and its control method, which can verify the presence or absence of assembly and problem identification of the servo valve or control on site.

Therefore, the present invention can operate and perform performance tests by itself using a portable controller after assembly without using a dedicated actuator controller, and can analyze the control status of the actuator accordingly, identify problems in advance and do not require collaboration with the control room Thus, the overall working time can be shortened.

In addition, the portable controller according to the present invention can be used to take immediate action in the field when a problem occurs while operating the actuator and to suggest a test methodology for a solution due to the actuator's own problem.

In addition, since it is a portable controller that can be easily carried, the time burden for testing in the process is small.

100: portable controller 110: operation and display unit
120: interface unit 130: operation control unit
140: signal conversion unit 150: input and output unit
320: PI Control 410: 3-wire
420: 4-wire 430: 5-wire
440: 6-wire 510: actuator
520: LVDT 530: servo valve

Claims (6)

For testing the actuator 500 including the actuator module 510, the LVDT 520 for detecting the driving state of the actuator module 510, and the servo valve 530 for driving the actuator module 510 As a portable test device 100,
a manipulation and display unit 110 for user's manipulation and display of test results of the actuator 500;
an input/output unit 150 that outputs a control signal for controlling the servo valve 530 and receives a detection signal from the LVDT 520;
The LVDT (which is the result of detecting the state of the actuator module 510 driven by the operation of the servo valve 530 controlled by the operation of the servo valve 530 that receives the operation signal input through the operation and display unit 110 ( 520) receives the detection signal, determines whether the actuator 500 operates according to a preset standard, and displays the result on the operation and display unit 110;
The input/output unit 150 is composed of input/output terminals,
The input/output terminal is connected to the LVDT 520 and the servo valve 530 mounted on the actuator module 510, characterized in that for testing an actuator equipped with a servo valve Portable test device 100. According to claim 1,
The wiring method of the LVDT (520) is a portable test device (100), characterized in that it has any one of the three-wire type (410), four-wire type (420), five-wire type (430) and six-wire type (440). ). According to claim 1,
An interface unit 120 that transmits signals manipulated by the operation and display unit 110 to the operation control unit 130 and receives all signals through the operation and control unit 130 and transmits them to the operation and display unit 110 A portable test device 100, characterized in that it comprises. According to claim 1,
Characterized in that it comprises a signal conversion unit 140 for converting the signal transmitted and received by the operation control unit 130 and the input/output unit 150 into a signal suitable for the operation control unit 130 and the input/output unit 150 A portable test device (100). As a test method using the portable test device 100 for testing an actuator equipped with a servo valve according to any one of claims 1 to 4, the portable test device 100 is characterized by executing the following modes Test method using:
A) The first setting step (S11) of selecting the wiring method of the LVDT (520), the second setting step (S12) of setting the operating current range of the servo valve 530, and the control type of P Controller or PI Controller A setting mode (S10) including a third setting step (S13) of selecting;
B) Completely closed state based on the detection signal of the LVDT 520 by input of the minimum and maximum values of the operating current range of the servo valve 530 set in the setting mode (S10) by the operation control unit 130 and a fully open state, and a calibration mode for calculating quadratic equations (S20);
c) A test of inputting a target value of the actuator 500 by performing the setting mode (S10) and the calibration mode (S20) and testing whether the actuator 500 responds from the detection signal of the LVDT (520) mode (S30);
d) A trend mode (S40) that tracks real-time and time-series changes by storing input values and output values according to the execution of the calibration mode (S20) and the test mode (S30). The method of claim 5,
The test mode (S30),
An inclination test for testing whether the actuator 500 follows the target value with an inclination input by a user;
A control method of a portable test apparatus 100, characterized in that for testing at least one of step tests for testing whether or not it responds immediately to a target value input by a user.

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