KR20160079293A - Error detecting apparatus and method for a bridge travelling crane - Google Patents

Error detecting apparatus and method for a bridge travelling crane Download PDF

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Publication number
KR20160079293A
KR20160079293A KR1020140190437A KR20140190437A KR20160079293A KR 20160079293 A KR20160079293 A KR 20160079293A KR 1020140190437 A KR1020140190437 A KR 1020140190437A KR 20140190437 A KR20140190437 A KR 20140190437A KR 20160079293 A KR20160079293 A KR 20160079293A
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KR
South Korea
Prior art keywords
voltage
reverse
magnetic
current
range
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Application number
KR1020140190437A
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Korean (ko)
Inventor
최민석
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현대제철 주식회사
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Priority to KR1020140190437A priority Critical patent/KR20160079293A/en
Publication of KR20160079293A publication Critical patent/KR20160079293A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/22—Control systems or devices for electric drives

Abstract

The present invention relates to an apparatus and a method for detecting errors of a bridge traveling crane, which can detect an error which can occur due to function degradation and poor quality of magnetic ports. The present invention provides the apparatus for detecting errors of a bridge traveling crane, having one or more magnetic ports and a port driving unit driving the magnetic ports, which comprises: a voltage/current detection unit detecting reverse voltage and reverse current applied to the magnetic ports when the bridge traveling crane drops; a control unit determining whether an error occurs at the magnetic ports using the reverse voltage and the reverse current detected when the magnetic ports are driven; and an alarm unit outputting an alarm using visual information and auditory information according to a control operation of the control unit in case an error occurs at the magnetic ports.

Description

Technical Field [0001] The present invention relates to an error detecting apparatus and method for a bridge traveling crane,

The present invention relates to an error detecting apparatus and method for a bridge traveling cranes, and more particularly, to an error detecting apparatus and method for a bridge traveling cranes that can detect an error that may occur due to a malfunction of a magnetic port of a bridge- To an apparatus and method for error detection of a crane.

Generally, a bridge traveling crane (BTC) for heavy plate working has a plurality of magnetic pots (for example, 10) (see FIGS. 1A and 1B) Lifts and drops a target object (i.e., a thick plate) by arbitrarily selecting a predetermined number (e.g., 6 to 10) of magnetic ports of the plurality of magnetic ports corresponding to the size of the target object do.

The bridge traveling cranes (BTC) are regularly maintained (or fail) for maintenance of safety and performance, such as replacement of cables or wires.

However, in the course of maintenance, replacement of the electric wire related to the control of the magnetic port may occur, and the magnetic force of the magnetic port may be lowered during the operation, and the residual magnetic force remaining in the magnetic port may cause a falling- There is also a problem. In particular, there was no way to detect errors in magnetic ports that could occur during a drop operation.

When an error occurs in the magnetic port of the bridge traveling cranes (BTC) as described above, there is a high possibility that human injury, facility damage, operation loss, and heavy plate failure due to dropping are likely to occur (FIG. 1 (c) (see Fig.

The background art of the present invention is disclosed in Korean Patent No. 20-0200155 (Aug. 8, 2000. Moving object drop prevention device of a magnet crane).

An object of the present invention is to provide an error detecting apparatus and method of a bridge traveling crane capable of detecting an error that may occur due to a malfunction and malfunction of a magnetic port of a bridge traveling cranes for heavy plate working.

Another object of the present invention is to provide an error detecting apparatus and method of a bridge traveling crane that automatically limits a hoist operation when an error occurs in a magnet port of a bridge traveling crane and outputs an alarm screen so that a driver can immediately respond to an error .

An error detection device of a bridge traveling crane according to an aspect of the present invention includes an at least one magnetic port and a port driving unit for driving the magnetic port, A voltage / current detector for detecting a reverse voltage and a reverse current applied to the magnetic port in a drop operation; A controller for determining occurrence of an error in the magnetic port by using a reverse voltage and a reverse current detected when the magnetic port is driven; And an alarm unit for outputting an alarm using visual information and auditory information under the control of the controller when an error occurs in the magnetic port.

In the present invention, the controller may apply a reverse voltage within a preset voltage range to the magnetic ports for a predetermined time for the drop operation of the magnetic ports, and when the reverse voltage is applied, And comparing the detected reverse voltage and reverse current with a preset voltage range and a current range, and when the detected reverse voltage and reverse current are out of the voltage range and the current range, an error is detected in the magnetic port It is judged that it has occurred.

In the present invention, the preset voltage range is a voltage range of a reverse voltage applied to each port group. When the detected reverse voltage is less than the set voltage range or exceeds the voltage range, The operation is automatically restricted and the alarm is output immediately.

In the present invention, the predetermined current range is a current range of a reverse current applied to each magnetic port when the reverse voltage is applied, and when the detected reverse current is less than the set current range or exceeds the current range, The control unit automatically limits the operation of the hoist and immediately outputs an alarm.

In the present invention, the control unit may store the reverse reverse voltage and reverse reverse voltage detected through the voltage / current detection unit in a storage unit, and store the stored reverse voltage / reverse current value in a predetermined voltage range and a current range And the detected reverse voltage / reverse current value is displayed until the next lift operation after the drop operation of the target object.

In the present invention, the controller displays the reverse voltage value detected for each port group through the alarm unit, and when the reverse voltage value is out of a predetermined voltage range, And displays a reverse current value detected for each magnetic port, and displays the reverse current value in a predetermined color when the reverse current value is out of a preset current range, The information including at least one of a fact that an error has occurred in each magnetic port, a measure in response to the occurrence of the error, and a method of confirming a specific error content.

In another aspect of the present invention, there is provided a method of detecting an error in a bridge traveling crane, comprising the steps of: during a drop operation of a bridge traveling crane including at least one magnetic port, step; Determining whether a reverse voltage applied to the port group is within a preset voltage range; Outputting an alarm in a predetermined manner if the reverse voltage applied to the port group is out of a preset voltage range according to the determination result; Detecting a reverse current applied to each of the magnetic ports and determining whether the reverse current is within a preset current range; And outputting an alarm in a predetermined manner if the reverse voltage applied to each magnetic port is out of a preset current range according to the determination result.

In the present invention, the preset alarm system may include a display of the detected reverse voltage value and reverse current value, a state and color display according to a result of comparison between the detected reverse voltage and a preset voltage range, An alarm display system including a state according to a comparison result of a preset current range and color display information.

The present invention enables to detect an error that may occur due to a malfunction and malfunction of a magnetic port of a bridge traveling cranes for heavy plate working, and also automatically restricts hoist operation when an error occurs in the magnet port of the bridge traveling cranes An alarm screen is displayed so that the driver can immediately respond to the error.

FIG. 1 is a photograph showing a shape of a general bridge traveling crane and a photograph of a plate defect which may occur in a fall-off accident.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an error detecting apparatus for a bridge traveling crane.
FIG. 3 is an exemplary view showing a photograph of the position of an example in which the voltage / current detecting unit is installed in FIG. 2; FIG.
FIG. 4 is an exemplary view showing a screen of a display unit on which a detection voltage and a current of a magnetic port in an operating state are displayed in FIG. 2; FIG.
Fig. 5 is an exemplary view showing the detection voltage of each group of each magnetic port and the state according to the detection current of each magnetic port in more detail in Fig.
FIG. 6 is an exemplary view showing an alarm screen displayed through a display unit when an error occurs in each magnetic port in FIG. 5; FIG.
7 is an exemplary diagram for explaining an error detection method of a bridge traveling crane according to an embodiment of the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an error detecting apparatus and method of a bridge traveling crane according to the present invention will be described below with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

2 is an exemplary diagram showing a schematic configuration of an error detecting device of a bridge traveling crane according to an embodiment of the present invention.

2, the error detecting apparatus of the bridge traveling cranes according to the present embodiment includes at least one or more magnetic ports 111 and 112, a port driving unit 120 for driving the magnetic ports 111 and 112, A voltage / current detector 130 for detecting a reverse voltage and a reverse current applied to the magnetic ports 111 and 112, a voltage / current detector 130 for detecting reverse voltages and reverse currents applied to the magnetic ports 111 and 112, A storage unit 160 for storing a reverse voltage and a reverse current value detected by the magnetic ports 111 and 112 and an error detection unit 160 for detecting errors in the magnetic ports 111 and 112, And an alarm unit 170 for outputting an alarm using visual information and auditory information under the control of the control unit 140 when an alarm occurs.

Here, the reverse voltage refers to a voltage to which the polarity of the voltage applied to the magnetic ports 111 and 112 is reversely applied, and the reverse current refers to a current flowing through the magnetic ports 111 and 112 when the reverse voltage is applied. .

The alarm unit 170 includes a display unit 171 that outputs an alarm using visual information, and a sound unit 172 that outputs an alarm using auditory information.

The magnetic ports 111 and 112 generate magnetic force to lift the object (i.e., the thick plate) or remove the magnetic force to drop the object (i.e., the thick plate) to a desired position.

The control unit 140 controls the constant voltage (the voltage applied in the opposite direction of the reverse voltage) to the magnetic ports 111 and 112 through the port driving unit 120 to generate a magnetic force in the magnetic ports 111 and 112, . In order to remove the magnetic force from the magnetic ports 111 and 112, the controller 140 applies a reverse voltage (a voltage applied in the opposite direction to the positive voltage) to the magnetic ports 111 and 112 through the port driving unit 120, ).

In order for the magnetic ports 111 and 112 to operate normally (for example, drop operation), a reverse voltage within a predetermined voltage range is applied to the magnetic ports 111 and 112 for a predetermined time (for example, 1 second) do.

For example, the reverse voltage application range (voltage range) may be set to 210V to 250V.

Of course, the voltage range (i.e., reverse voltage application range) may be set differently according to the embodiment.

At this time, the input voltage (i.e., reverse voltage) is applied to each port group (for example, group 1 (port 1 to port 5) and group 2 (port 6 to port 10)). If the input voltage (i.e., reverse voltage) is less than the predetermined voltage range (i.e., the reverse voltage application range) or exceeds the voltage range, the controller 140 limits the hoist operation and outputs an alarm do.

In order to normally operate (e.g., drop) the magnetic ports 111 and 112 when the reverse voltage is applied, a reverse current within a preset current range must flow through the magnetic ports 111 and 112.

For example, the current range (reverse current application range) may be set to 24A to 30A.

Of course, the current range (reverse current application range) may be set differently according to the embodiment.

At this time, the input current (i.e., reverse current) is applied to each of the magnetic ports (for example, ports 1 to 10). If the input current (i.e., reverse current) is less than the predetermined current range (reverse current application range) or exceeds the current range, the controller 140 limits the hoist operation and outputs an alarm.

The voltage / current detector 130 detects a reverse voltage that is actually applied when a reverse voltage is applied to the magnetic ports 111 and 112 and also detects a reverse current flowing through each of the magnetic ports 111 and 112, . 3 is a photograph of an example of the position where the voltage / current detecting unit 130 is installed.

The controller 140 compares the reverse voltage and the reverse current detected through the voltage / current detector 130 with a predetermined voltage range and current range, respectively, when the magnetic ports 111 and 112 are driven. If the voltage / current comparison result is less than or equal to the voltage range and the current range, the controller 140 determines that an error has occurred in the magnetic port.

The control unit 140 displays the reverse voltage and reverse current of each of the magnetic ports 111 and 112 detected through the voltage / current detection unit 130 through the display unit 171.

If the reverse voltage detected by each of the port groups (for example, group 1 and group 2) is less than a predetermined voltage range or exceeds the voltage range, the controller 140 controls the state (for example, OFF, LO, OK LO, OK, HI) when the reverse current detected by each of the magnetic ports 111 and 112 is less than a predetermined current range or exceeds the current range, (See Fig. 6).

The controller 140 stores the reverse voltage and reverse current detected by the voltage / current detector 130 in the storage unit 160. That is, since the time (for example, 1 second) during which the reverse voltage is applied to the magnetic ports 111 and 112 is very short, the controller 140 detects the reverse voltage and the reverse current The voltage / current) is stored in the storage unit 160 for a predetermined period of time (for example, after dropping and before the next lift operation) Voltage range and current range, and an operation to display the detected reverse voltage / reverse current value.

FIG. 4 is an exemplary view showing a screen of the display unit in which the detection voltage and the current of the magnetic port in the operating state are displayed in FIG.

4, the display screen of the display unit 171 displays the shape of the bridge traveling crane as an image, a number indicating the order of each magnetic port attached to the crane, and an operation state of each magnetic port Is displayed. For example, the active magnetic port is displayed in blue, and the inactive magnetic port is displayed in red.

The input voltages A1 and A2 (i.e., reverse voltages) applied to the bridge traveling cranes of the respective port groups (for example, group 1 (port 1 to port 5) and group 2 (port 6 to port 10) (Reverse currents) B1 and B2 flowing through the magnetic ports (or magnet ports) of the respective groups when the reverse voltage is applied are displayed. Therefore, the crane operator can grasp the state of each magnetic port by referring to input voltages A1 and A2 (i.e., reverse voltage) and current (i.e., reverse currents) B1 and B2 displayed on the display unit 171 .

FIG. 5 is a diagram illustrating in detail the state of the detection voltage of each magnetic port group and the detection current of each magnetic port, in FIG. 4, in detail.

As shown in FIG. 5A, when the reverse voltage detected for each port group (for example, group 1 and group 2) is less than a predetermined voltage range or exceeds the voltage range (For example, OFF, LO, OK, HI). 5 (b), when the reverse current detected by each of the magnetic ports 111 and 112 is less than a preset current range or exceeds the current range, For example, OFF, LO, OK, HI).

When the reverse voltage or the reverse current is less than a preset range, the controller 140 displays the first specific color (for example, yellow). If the reverse voltage or the reverse current exceeds a preset range (For example, red), and when the reverse voltage or the reverse current is within the predetermined range, the third specific color (for example, green) is displayed.

And the inoperative magnetic port (or port group) is displayed with a predetermined fourth specific color (e.g., gray).

If the reverse voltage or reverse current detected in each of the detected magnetic ports 111 and 112 does not satisfy the preset range (voltage range, current range), that is, if an error occurs, Automatically limits the hoist operation and immediately outputs an alarm (eg, screen alarm, sound alarm) (see FIG. 6).

FIG. 6 is an exemplary view showing an alarm screen displayed through the display unit when an error occurs in each magnetic port in FIG.

6, when an error occurs in each magnetic port, the control unit 140 determines whether an error has occurred in the magnetic port (for example, a current fault has occurred), a corrective action (for example, a hoist operation And a method of confirming a specific error content (e.g., a content confirmation guide). In addition, the controller 140 may output an alarm sound together with the alarm screen.

7 is an exemplary diagram for explaining an error detection method of a bridge traveling crane according to an embodiment of the present invention.

As shown in FIG. 7, the control unit 140 applies a reverse voltage to each of the magnetic ports 111 and 112 for a predetermined time (for example, 1 second) during the drop operation of the bridge traveling cranes (S101).

If the respective magnetic ports 111 and 112 operate normally with respect to the reverse voltage, the residual magnetic force is removed from each of the magnetic ports 111 and 112, The object (eg plate) will be completely dropped. However, if the magnetic ports 111 and 112 do not operate normally, a target object (for example, a thick plate) is not completely dropped, thereby possibly causing a safety accident.

Therefore, in the present embodiment, a reverse current value flowing through each of the magnetic ports 111 and 112 is detected in accordance with the reverse voltage and the reverse voltage, and the magnetic flux of each of the magnetic ports 111 and 112 It is determined whether or not it is in a normal state.

That is, the control unit 140 detects a reverse voltage applied to each port group (for example, group 1 and group 2) and displays the detected reverse voltage through the display unit 171 (S102). This allows the crane operator to verify the applied voltage (ie, reverse voltage) for each magnetic port group.

The controller 140 determines whether a reverse voltage applied to each of the port groups (for example, group 1 and group 2) is within a normal voltage range (i.e., a preset applied voltage range) (S103).

If the reverse voltage applied to each of the port groups (for example, group 1 and group 2) is out of a preset voltage range (NO in S103), the controller 140 controls An alarm is output (S106).

Here, the preset alarm system means an alarm display system including a display of the detected reverse voltage, a state according to a result of comparison between the detected reverse voltage and a predetermined voltage range, and a color display (refer to FIG. 5A) ).

The control unit 140 detects a reverse current applied to each of the magnetic ports 111 and 112 and displays the reverse current through the display unit 171 (S104). This allows the crane operator to verify the applied current (ie, reverse current) for each magnetic port.

The control unit 140 determines whether the reverse current applied to each of the magnetic ports (for example, port 1 to port 10) is within a predetermined current range (i.e., a predetermined current range) (S105).

If the reverse voltage applied to each of the magnetic ports (for example, port 1 to port 10) is out of the predetermined current range (NO in S105), the controller 140 controls the pre- (S106).

Here, the preset alarm mode means an alarm display mode including a display of the detected reverse current value, a state according to a result of comparison between the detected reverse current and a preset current range, and a color display (Fig. 5 (b) Reference).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, I will understand the point. Accordingly, the technical scope of the present invention should be defined by the following claims.

111, 112: Magnetic port 120: Port driver
130: voltage / current detection unit 140:
160: Storage unit 170: Alarm unit
171: Display unit 172: Sound unit

Claims (8)

An error detection device for a bridge traveling crane comprising at least one or more magnetic ports and a port driver for driving the magnetic ports,
A voltage / current detector for detecting a reverse voltage and a reverse current applied to the magnetic port during a drop operation of the bridge traveling cranes;
A controller for determining occurrence of an error in the magnetic port by using a reverse voltage and a reverse current detected when the magnetic port is driven; And
And an alarm unit for outputting an alarm using visual information and auditory information under the control of the controller when an error occurs in the magnetic port.
The apparatus of claim 1,
Applying a reverse voltage within a preset voltage range to the respective magnetic ports for a predetermined time for drop operation of the magnetic port, detecting a reverse current flowing in each of the magnetic ports when the reverse voltage is applied,
If the detected reverse voltage and reverse current are out of the voltage range and current range, it is determined that an error has occurred in the magnetic port And an error detection unit for detecting the error of the bridge traveling crane.
3. The method of claim 2,
Wherein the predetermined voltage range is a voltage range of a reverse voltage applied to each port group, and when the detected reverse voltage is less than the set voltage range or exceeds the voltage range, the control unit automatically limits the hoist operation And outputs an alarm immediately after the alarm is detected.
3. The method of claim 2,
Wherein the predetermined current range is a current range of a reverse current applied to each magnetic port when the reverse voltage is applied, and when the detected reverse current is less than the predetermined current range or exceeds the current range, Wherein the controller is configured to automatically limit the operation of the bridge traveling cranes and to output an alarm immediately.
The apparatus of claim 1,
Storing an inverse voltage and a reverse current value detected through the voltage / current detection unit in a storage unit, comparing the stored reverse voltage / reverse current value with a preset voltage range and a current range, And the voltage / reverse current value is displayed until the next lift operation after the drop operation of the object is performed.
The apparatus of claim 1,
And displays an inverted voltage value detected for each port group through the alarm unit, displays the inverted voltage value in a predetermined color when the inverted voltage value is out of a preset voltage range, And when the reverse current value is out of a preset current range, the state is displayed in a predetermined color,
And outputting information including at least one of a fact that an error has occurred in each of the magnetic ports, a measure in response to the occurrence of the error, and a method of confirming a specific error content through a pop-up alarm screen of the alarm unit An error detection device of a bridge traveling crane.
Applying a reverse voltage to each of the magnetic ports for a predetermined time during a drop operation of a bridge traveling cranes including at least one magnetic port;
Determining whether a reverse voltage applied to the port group is within a preset voltage range;
Outputting an alarm in a predetermined manner if the reverse voltage applied to the port group is out of a preset voltage range according to the determination result;
Detecting a reverse current applied to each of the magnetic ports and determining whether the reverse current is within a preset current range; And
And outputting an alarm in a predetermined manner when the reverse voltage applied to each magnetic port is out of a predetermined current range according to the determination result. Way.
8. The method according to claim 7,
A state and a color indication according to a result of comparison between the detected reverse voltage and a predetermined voltage range, a state and a color according to a result of comparison between the detected reverse current and a preset current range, And an alarm display method including display information.
KR1020140190437A 2014-12-26 2014-12-26 Error detecting apparatus and method for a bridge travelling crane KR20160079293A (en)

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KR1020140190437A KR20160079293A (en) 2014-12-26 2014-12-26 Error detecting apparatus and method for a bridge travelling crane

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112919321A (en) * 2021-02-04 2021-06-08 上海海事大学 Detection apparatus for non-contact measurement synchronous error

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112919321A (en) * 2021-02-04 2021-06-08 上海海事大学 Detection apparatus for non-contact measurement synchronous error

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