KR20180062530A - Portable EH Converter and Servomotor Auto Tuning and status confirmation Apparatus - Google Patents

Abstract

The present invention relates to a portable electric-hydraulic (EH) converter and an automatic correction determination device of a servo motor, automatically providing an electric command signal to an EH converter to check normal and abnormal operation states of the EH converter and a servo motor. According to the present invention, the portable EH converter comprises: a pressure sensor (20) to measure the pressure of control oil of the EH converter (11); a displacement sensor (30) to measure a displacement (movement) of the servo motor (12); a flow rate sensor (40) to measure a passing flow rate of the control oil towards the servo motor (12); and the automatic correction determination device (100) inputting an electric command signal to the EH converter (11), receiving measurement values measured in the pressure, displacement, and flow rate sensors (20, 30, 40) to check an operation state of the EH converter (11) and the servo motor (12).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable electric-hydraulic converter and a servomotor,

The present invention provides an automatic calibration of a portable electro-hydraulic converter and servomotor that automatically provides an electric command signal to the electro-hydraulic converter to confirm the normal operating state and the malfunction state of the electro-hydraulic converter and the servomotor to the electric command signal And a judging device.

Generally, the main valve is composed of an electric-hydraulic converter and a servo motor. The electric-hydraulic converter is a kind of hydraulic valve that receives an electric command signal (0-7V-> 0-250mA) and converts it into a hydraulic signal of control oil pressure And the servo motor is an actuator device that moves up and down by receiving the control oil pressure of the electro-hydraulic converter. It is a core part of the major turbine of the power plant turbine. After the maintenance work in the power plant, the electric motor- The calibration is performed so that it is accurately followed.

1 is a schematic diagram for calibration of a system comprising a conventional electro-hydraulic converter and a servo motor. 1, the conventional electric-to-hydraulic converter 11, the servo motor 12, the electric signal output device 13, the pressure gauge 14, the servo motor displacement measurer 15, A command signal is input and the control oil pressure is recorded in a first calibration report with a chart or a table with respect to the input voltage and the displacement is recorded in two calibration reports by a chart or a table with respect to the control oil pressure of the servo motor.

At the time of the calibration work, four workers (1 worker for operating the electric command signal to the electro-inflow converter, 1 worker for reading the pressure gauge with the naked eye, 2 workers for reading the displacement measurer) To perform a calibration operation.

In the calibration work procedure, the first operator inputs the voltage signal using the signal input device 13 to the electro-hydraulic converter 11, inputs 0 to 1 V and waits for 10 seconds, and then the control oil pressure is measured by the second operator using the pressure gauge 14) and record it on the first calibration certificate.

The voltage signals of 1-> 2V, 2-> 3V, 3-> 4V, 4-> 5V, 5-> 6V and 6-> 7V are also performed in the same manner and recorded in the first calibration certificate.

When calibration of the electro-hydraulic converter is completed, the servomotor is calibrated.

The calibration work of the servomotor measures the control oil pressure which is changed when the voltage signal of the electro-hydraulic converter is inputted and the displacement of the servo motor which moves according to the pressure. When the first operator inputs the voltage signal to the electro- When the second work price becomes the pressure condition indicated in the second calibration report while looking at the scale of the pressure gauge 14, the third worker for measuring the displacement of the servomotor and the third worker , The fourth operator reads the displacement scale for each pressure condition and writes it in the second calibration report manually.

In this conventional calibration method, four workers are required, and the calibration work of the electric-hydraulic converter and the servomotor is performed, which takes a long time.

In addition, since the conventional calibration method relies on the operator's eyes only to measure pressure and displacement, it is difficult to accurately measure the measurement, and the measurement results are written in the first and second calibration reports, resulting in inaccurate calibration work results . In addition, when the worker changes, there is a problem that a difference occurs in the measured value.

That is, in the case of a power plant having a plurality of electro-hydraulic converters and servo motors, the conventional calibration method requires a lot of manpower to be used for the calibration work, and all the work results are written in a manual manner, There is huge economic loss and the result is also not precise.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Registration No. 10-1585694 filed in the Korean Intellectual Property Office (registered on January 20, 2016).

SUMMARY OF THE INVENTION An object of the present invention is to provide a portable electric-to-hydraulic converter and a self-calibrating device for a servomotor capable of confirming a normal operation state and a malfunction state of an electric-hydraulic converter and a servo motor.

Another object of the present invention is to provide an electric-hydraulic control system capable of simultaneously performing an electric command signal to an electric-hydraulic converter to determine a control oil pressure state of an electric-hydraulic converter and a displacement determination with respect to a control oil pressure of a servo motor, Converter and a servo motor.

Another object of the present invention is to provide an electric-to-hydraulic converter and an automatic correction of a servomotor capable of judging whether or not a servo motor is excessively leaked by automatically measuring a flow rate of a servo motor output from an electric- Device.

According to another aspect of the present invention, there is provided a control apparatus for an internal combustion engine, comprising: a displacement chart output of a control oil pressure according to an electric command signal provided to an electric-hydraulic converter; displacement chart output for a control oil pressure of a servo motor; And an automatic calibration confirmation device for an electric-hydraulic converter and a servomotor capable of performing parameter calculation, outputting a report for each valve, and the like.

The automatic calibrating and judging device for a portable electric-hydraulic converter and a servomotor according to the present invention comprises a pressure measuring sensor 20 for measuring the pressure of the control oil of the electro-hydraulic converter 11, A displacement measuring sensor 30 for measuring the flow rate of the control oil to the servomotor 12, a flow rate measuring sensor 40 for measuring the flow rate of the control oil to the servomotor 12, The electric-hydraulic converter 11 receives an electric command signal from the electric-hydraulic converter 11 and receives measured values measured by the pressure measuring sensor 20, the displacement measuring sensor 30 and the flow measuring sensor 40, And an automatic calibration determination device (100) for confirming the operating state of the servomotor (12)

Preferably, the automatic calibrating determination apparatus 100 includes an electric command signal setting unit 120 for setting an electric command signal provided to the electro-hydraulic converter 11; An electric command signal providing unit (130) for providing the electric signal set by the electric command signal setting unit (120) to the electric-hydraulic converter (11); A reference sensing value management unit 140 for registering and managing reference information on a reference oil pressure value, a reference displacement value, and a reference flow rate value according to an electrical signal; The control oil value measured by the pressure measurement sensor 20 in real time, the displacement value of the servo motor 12 measured by the displacement measurement sensor 30, A measurement value confirmation unit 150 provided with a flow rate value of the flow rate; And an error determination unit 160 for comparing the measurement value according to each electrical signal provided by the measurement value verification unit 150 with the registered reference sensing value and determining whether the measurement value matches the registered reference sensing value.

Preferably, the apparatus further includes a major valve check section 110 for confirming information of the major valve to be checked.

Preferably, the electrical command signal providing unit 130 sequentially supplies the voltage to the electro-hydraulic converter 11 whenever the reference range is set.

The alarm unit 170 may further include a warning unit 170 that alerts the user that the measured value does not match the reference value.

The measurement value output unit 180 may further include a measurement value output unit 180 that outputs measurement values measured by the respective sensors identified by the measurement value verification unit 150.

A current confirmation unit 190 for confirming a current in an electric command signal provided to the electric-hydraulic converter 11 in the electric command signal providing unit 130; And a voltage verifying unit (200) for measuring a voltage in an electrical command signal provided to the converter (11).

The present invention can simultaneously perform the determination of the control oil pressure state of the electric-hydraulic converter and the determination of the displacement of the servo motor against the control oil pressure by inputting the electric command signal for operating the electric-hydraulic converter, And the servo motor can be utilized for the calibration work.

In addition, there is an advantage in that excessive flow in the servo motor can be judged by automatically measuring the flow rate output from the electric-hydraulic converter during the calibration operation and flowing into the servo motor.

In addition, hydraulic pressure, displacement, and flow values can be automatically measured, enabling automatic calibration of a major valve in a short time by a single operator.

In addition, when the hydraulic pressure value, the displacement value, and the flow rate value do not match the reference value, there is an advantage that the operator can appropriately take measures by displaying or outputting the calibration value together with the warning.

1 is a schematic diagram for calibration of a system comprising a conventional electro-hydraulic converter and a servo motor.
FIG. 2 is a schematic view showing an embodiment of a simultaneous automatic correcting apparatus for an electric-hydraulic converter and a servo motor according to the present invention. FIG.
3 is a block diagram showing a configuration of a data processing unit applied to the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus for determining an automatic correction of an electric-hydraulic converter and a servo motor according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2, the present invention is characterized in that an electric command signal is input to the electric-to-hydraulic converter 11 and a signal measured by various sensors is received, so that the operation state of the electric-hydraulic converter 11 and the servomotor 12 A pressure measuring sensor 20 for measuring the pressure of the control oil of the electro-hydraulic converter 11 operated by the electric command signal input from the automatic calibration determination device 100, A displacement measuring sensor 30 for measuring the displacement of the servo motor 12 that receives the control oil pressure of the electric-hydraulic converter 11 and moves the actuator to open and close the turbine valve, And a flow rate measuring sensor 40 for measuring the flow rate of the control oil to the fluid. At this time, the displacement measuring sensor 30 and the flow rate measuring sensor 40 are respectively installed when a plurality of servomotors 12 are connected to the electro-inflow converter.

3, the automatic calibration determination apparatus 100 includes a major valve check unit 110, an electrical command signal setting unit 120, an electric command signal providing unit 130, a reference sensing value managing unit 140, A value checking unit 150, an error determining unit 160, a warning unit 170, and a measured value output unit 180.

The major valve check unit 110 confirms the information of the major valve to be checked. The information on the major valve can be input directly by the operator or selected from previously registered information.

The electric command signal setting unit 120 sets the range of the electric signal provided to the electro-hydraulic converter 11. [ The electrical signal is input based on the voltage of 0 ~ 7V. It can be inputted by the operator based on a certain range, or can be set by selecting the registered reference range.

The electric command signal providing unit 130 provides the electric signal set by the electric command signal setting unit 120 to the electro-hydraulic converter 11. [ When the reference range is set, the electric command signal providing unit 130 sequentially supplies the voltage to the electro-hydraulic converter 11 at predetermined time intervals. Therefore, the electric-hydraulic converter 11 converts the electric command signals of different 1V, 2V, 3V, 4V, 5V, and 6V into hydraulic signals of different control oil pressures sequentially.

The reference sensing value managing unit 140 registers and manages reference information about the reference oil pressure value, the reference displacement value, and the reference flow rate value according to the electrical signal.

The measurement value confirmation unit 150 checks the pressure value of the control oil measured by the pressure measurement sensor in real time, the displacement value of the servo motor 12 measured by the displacement measurement sensor 30, The flow rate value of the control oil is provided. When the electrical signal provided to the electro-hydraulic converter 11 is sequentially changed by the measured value checking unit 150, the measured values are recorded on the basis of the electrical signal.

The error determination unit 160 compares the measurement value according to each electrical signal provided by the measurement value verification unit 150 with the registered reference sensing value to determine whether or not they match.

The warning unit 170 displays the measurement value so that it can be confirmed from the outside if it is determined by the error determination unit 160 that the measured value does not match the reference value. The warning unit 170 may warn audibly through an alarm or visually warn through a monitor screen.

The measurement value output unit 180 outputs measured values and calibration values measured by the respective sensors identified by the measurement value confirmation unit 150. [ A table, a chart or a graph of the control oil pressure versus voltage of the electro-hydraulic converter 11 according to the electric command signal provided to the electro-hydraulic converter 11, Information such as a table, a chart or a graph, hysteresis, a deviation, a calibration value applied by calculating a parameter, etc., is displayed on the screen or printed. At this time, it is preferable that the measurement value output unit 180 describe the information on the major valve to be measured with the outputted information.

The automatic calibration determination apparatus 100 includes a current checking unit 190 for checking a current in an electrical command signal transmitted from the electrical command signal providing unit 130, And a voltage verifying unit 200 for measuring a voltage in the electric command signal. Accordingly, it is possible to determine whether the electric command signal provided from the electric command signal setting unit 120 to the electro-hydraulic converter 11 is transmitted with a correct current value and an accurate voltage value.

According to the present invention, it is possible to determine whether the servo motor is excessively leaked by automatically measuring the flow rate of the oil flowing from the electric-hydraulic converter to the servo motor.

As described above, according to the present invention, since the electric-hydraulic converter and the servomotor can be automatically operated while checking the normal operation state and the malfunction state of the electric-hydraulic converter and the servomotor, , An electro-hydraulic converter, and an automatic calibration / confirmation device for a servo motor, which can be widely used.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is to be understood, therefore, that the embodiments described above are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, All changes or modifications that come within the scope of the equivalent concept are to be construed as being included within the scope of the present invention.

11: electric-hydraulic converter 12: servo motor
20: Pressure measuring sensor 30: Displacement measuring sensor
40: Flow measurement sensor 100: Automatic calibration determination device
110: Major Valve Verification Unit 120: Electrical Command Signal Setting Unit
130: electric command signal supply unit 140: reference sensing value management unit
150: measurement value verification unit 160: error determination unit
170: warning part 180: measured value output part
190: current check unit 200: voltage check unit

Claims (9)

A pressure measurement sensor 20 for measuring the pressure of the control oil of the electro-hydraulic converter 11,
A displacement measuring sensor 30 for measuring the displacement of the servo motor 12,
A flow rate measuring sensor (40) for measuring a flow rate of control oil to the servo motor (12);
The electric-hydraulic converter 11 receives an electric command signal from the electric-hydraulic converter 11 and receives measured values measured by the pressure measuring sensor 20, the displacement measuring sensor 30 and the flow measuring sensor 40, And an automatic calibrating determination device (100) for confirming the operating state of the servomotor (12). The automatic calibrating and judging device of a portable electric-hydraulic converter and servomotor. The automatic correction determination device (100) according to claim 1,
An electric command signal setting unit (120) for setting an electric signal provided to the electric-hydraulic converter (11);
An electric command signal providing unit (130) for providing the electric signal set by the electric command signal setting unit (120) to the electric-hydraulic converter (11);
A reference sensing value management unit 140 for registering and managing reference information on a reference oil pressure value, a reference displacement value, and a reference flow rate value according to an electrical signal;
A control value of the control oil measured by the pressure measurement sensor 20 in real time, a displacement value of the servo motor 12 measured by the displacement measurement sensor 30, a flow rate value of the control oil measured by the flow measurement sensor 40 A measurement value confirmation unit 150 receiving the measurement value;
And an error determination unit (160) for comparing the measurement value according to each electrical signal provided by the measurement value confirmation unit (150) with the registered reference sensing value and determining whether the measured value is coincident or not. Converter and servo motor. The portable electric-hydraulic converter and servomotor of claim 1, further comprising a major valve check unit (110) for confirming information of a major valve to be checked. The apparatus of claim 1, wherein the electric command signal setting unit (120) sets the electric signal to a predetermined range. The electric command signal providing unit (130) according to claim 1, wherein the electric command signal providing unit (130) sequentially increases the voltage at predetermined time intervals to provide the voltage to the electric-hydraulic converter (11) An apparatus for determining an automatic correction of a motor. The portable electro-hydraulic converter according to claim 1, further comprising: a warning unit (170) for warning that the measurement value can be confirmed from the outside if it is determined by the error determination unit (160) And an automatic calibration determination device of the servo motor. The portable electric-hydraulic converter and servomotor according to claim 1, further comprising a measurement value output unit (180) for outputting measurement values measured by the respective sensors confirmed by the measurement value confirmation unit (150) Automatic calibration judgment device. The measured value output section 180 outputs a table or chart of the control oil pressure versus voltage of the electro-hydraulic converter 11 according to the electrical command signal provided to the electro-hydraulic converter 11, (12) for calculating a table, a chart or a graph of a control oil pressure versus a displacement, hysteresis, a deviation, a parameter, and outputting or printing information on a calibration value applied to the screen An apparatus for determining an automatic correction of a motor. The electric power steering system according to claim 1, further comprising: a current checking unit (190) for checking a current in an electric command signal provided to the electric-hydraulic converter (11)
Further comprising a voltage checking unit (200) for measuring a voltage in an electric command signal provided to the electric-hydraulic converter (11) in the electric command signal providing unit (130) Automatic calibration judgment device.

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