JP6912983B2 - Closed switchboard system - Google Patents

Description

Embodiments of the present invention relate to closed switchboard systems.

When the motors used in the plant equipment are controlled, protected, and monitored by the closed switchboard control center and the central control unit connected to the closed switchboard control center, the number of control wirings connected to various devices becomes very large and complicated. Therefore, the installation work of the closed switchboard control center and the equipment maintenance are complicated and sophisticated, and the cost is increasing.

Japanese Unexamined Patent Publication No. 10-185980 Japanese Unexamined Patent Publication No. 2001-338566 JP-A-2010-165321

Closed switchboard We provide a closed switchboard system that can shorten the wiring work period of the control center and improve maintainability.

The closed switchboard system according to the embodiment includes an ammeter arranged so that it can be photographed from the outside, a power supply unit including a magnetic switch capable of opening and closing an electric current path to a load, a control center including a plurality of the power supply units, and the like. An image pickup camera configured to be able to take an image of the ammeter arranged in the control center, an image pickup camera control device for controlling the image pickup camera, and a central control unit configured to be able to receive information from the image pickup camera control device. The central control unit stores the horizontal projection position indicating the tip position of the display needle of the ammeter projected from a predetermined direction and the current value associated with the horizontal projection position, and stores the predetermined value. The horizontal projection position recognized based on the image of the display needle taken by the imaging camera from a direction different from the direction is compared with the horizontally projected position stored in advance, and the current value of the ammeter is recognized. When it is determined that the current value is abnormal, the magnetic switch is controlled to cut off the electric circuit of the corresponding power supply unit.

The figure which shows the schematic structure of the closed switchboard system which concerns on 1st Embodiment Front view showing the schematic configuration of the row board Block diagram showing a schematic configuration of an imaging camera control device The figure which shows the schematic structure of the power supply unit Front view showing the schematic configuration of an ammeter The figure which shows the schematic structure of the closed switchboard system which concerns on 2nd Embodiment

Hereinafter, embodiments will be described with reference to the drawings. In the description of the embodiment, substantially the same constituent parts are designated by the same reference numerals, and the description thereof will be omitted.

(First Embodiment)
The first embodiment will be described with reference to FIGS. 1 to 5. FIG. 1 is a diagram showing a schematic configuration of a closed switchboard system 1 according to an embodiment. FIG. 2 is a front view showing a schematic configuration of a row board 11 configured by arranging a plurality of control centers 10 in the horizontal direction. FIG. 3 is a block diagram showing a schematic configuration of the image pickup camera control device 16, and FIG. 4 is a diagram showing a schematic configuration of the power supply unit 16. FIG. 5 is a front view showing a schematic configuration of an ammeter provided in the power supply unit 16.

As shown in FIGS. 1 and 2, the closed switchboard system 1 includes a row board 11 in which a plurality of control centers 10 (10a to 10e) are arranged, an image pickup camera 14, an image pickup camera control device 18, and a central control unit 24. It has. Each of the control centers 10 is composed of a rectangular box-shaped control center main body, and is provided with a plurality of stages of slots 12 inside. A power supply unit 16 is installed in the slot 12 so that it can be inserted and removed. FIG. 1 shows an example in which a plurality of power supply units 16 are arranged in the vertical direction. The back surface of the control center 10 has the same configuration, and a plurality of power supply units 16 are provided in the slots 12 so as to be removable. The appearance from the rear is almost the same as that of FIG. 1 or 2. Another image pickup camera and an image pickup camera control device for capturing a rear view image are provided behind the column board 11.

As shown in FIG. 3, the imaging camera control device 18 includes a control unit 18a, a camera-side input / output unit 18b, and a central control unit-side input / output unit 18c. The image pickup camera 14 is configured to be capable of photographing the front surface of the control center 10 of the row board 11. The image pickup camera control device 18 is a control unit that controls the image pickup camera 14. The control unit 18a is mainly composed of a microcomputer including a storage unit composed of a CPU, RAM, ROM, etc., an I / O, a bus, and the like. A control program for controlling the image pickup camera 14 by the control unit 18a is stored in the ROM, and the control unit 18a controls each part of the image pickup camera 14 by reading and executing the program by the CPU. The process is being executed. Although the configuration of the central control unit 24 is not shown, it is mainly composed of a microcomputer including a storage unit composed of a CPU, RAM, ROM, etc., an I / O, a bus, and the like.

The image pickup camera 14 may be, for example, a fixed point camera, and may be configured so that the entire front surface of the column 11 can be photographed on a single screen. , Each part of the row board 11 and the control center 10 may be configured so that the entire row board 11 can be photographed by photographing while shifting the positions. The camera-side input / output unit 18b is connected to the image pickup camera 14 and controls the image pickup camera 14. The input / output unit 18c on the central control unit side is connected to the central control unit 24, and transmits the image captured by the image pickup camera 14 to the central control unit 24.

As shown in FIG. 4, the power supply unit 16 includes a wiring breaker 16a, a current transformer 16b, a magnetic switch 16c, and a switch box 16e, and the switch box 16e includes an ammeter 15 and a switch 16f. .. The circuit breaker 16a for wiring opens the electric circuit when an abnormal overcurrent flows in the circuit on the secondary side due to factors such as overload and short circuit, and cuts off the power supply from the primary side to cut off the power supply to the load circuit and the electric wire. Is a type of overcurrent circuit breaker used to protect against damage. The current transformer 16b converts a large current flowing in the main circuit into a current having a size that is easy to handle, and by being connected to the ammeter 15, the current value flowing in the main circuit is displayed in the ammeter 15. ing. The magnetic switch 16c is an electromagnetic contactor that opens and closes an electric circuit by the operation of an electromagnet.

The main power supply line 17a connects the circuit breaker 16a for wiring and the magnetic switch 16c. The end of the main power supply line 17b connected to the side opposite to the main power supply line 17a when viewed from the magnetic switch 16c is connected to a motor (not shown) to supply electric power to the motor. The current transformer 16b converts the current value of the current flowing through the main power supply line 17a, and controls the ammeter 15 via the control wire 17c. As a result, the current value flowing through the main power supply line 17a is displayed on the ammeter 15.

The control power supply 17d connected to the magnetic switch 16c is connected to the switch box 16e, and is connected to the central control unit 24 from the switch box 16e to provide a connection line 22 that functions as an input / output line with the central control unit 24. Has been done. As a result, the magnetic switch 16c is connected to the central control unit 24 via the connection line 22, the switch box 16e, and the control power supply 17d, and the central control unit 24 can control the magnetic switch 16c.

Further, the switch 16f is arranged in the switch box 16e, and the magnetic switch 16c can be controlled by the manual operation of the switch 16f to open and close the electric circuits of the main power lines 17a and 17b. By providing the switch 16f with a function as a switch lamp for displaying the on / off of the switch depending on the brightness of the lamp, it is possible to display the on / off of the switch manually or under the control of the central control unit 24.

The imaging camera 14 captures an image of an ammeter 15 provided in each of the power supply units 16 of the control center 10 of the row board 11, and the imaging camera control device 18 determines the needle position of the captured ammeter 15 to determine the current. Read the temperature displayed on the total 15. The read current value is transmitted to the central control unit 24, and when the central control unit 24 determines that the current is abnormal, the central control unit 24 releases the magnetic switch 16c and transmits a control signal for disconnecting the electric circuit. As a result, the magnetic switch 16c is disconnected, thereby protecting the motor and the like controlled by the power supply unit 16.

The position of the ammeter 15 is recognized as follows, for example. As shown in FIG. 2, for example, the row board 11 has the row board alignment marks G1 to G4 for grasping the overall position, size, etc. of the row board 11 (hereinafter, these are collectively referred to as the row board alignment mark G). The local alignment marks A1 to A4, B1 to B4, C1 to C4, and D1 to D4 for recognizing the position of each control center 10 are provided in each control center 10 (10a to 10e). , E1 to E4 (hereinafter, these are collectively referred to as a local alignment mark A) are arranged in each of the control centers 10a to 10e. The position coordinates of the column alignment mark G and the local alignment mark A are stored in advance in the storage unit of the imaging camera control device 18.

Further, the position map of each control center 10 in the column 11, the position map of the slot 12 provided in each control center 10, and the position coordinates of the ammeter 15 in each slot 12 are also stored in the storage unit of the imaging camera control device 18. It is remembered in. Therefore, the position of the control center 10 is recognized by the column alignment mark G, the detailed position of each control center 10 is grasped by the local alignment mark A, and the position map of the slot 12 of each control center 10 and the ammeter 15 are further recognized. By recognizing the position of the ammeter 15 from the coordinates of, each ammeter 15 is specified, and the current value of the ammeter 15 is grasped. An example of the procedure will be described below.

First, the image pickup camera 14 recognizes the position coordinates of the column alignment mark G transmitted to the image pickup camera control device 18. As a result, the vertical and horizontal axis directions and the helix angle of the row board 11 are calculated. Based on this calculation result, the coordinate center is specified, and a correction value is given to the position coordinates of the local alignment mark A of the control center 10 belonging to the column board 11 stored in advance. Next, the position coordinates of the local alignment mark A are recognized by recognizing the image of the local alignment mark A in each control center 10 in the column board 11.

As a result, the vertical and horizontal axis directions and coordinate reference positions of each control center 10 are calculated, and based on the calculation results, the position map of the slot 12 stored in advance and the position coordinates of the ammeter 15 of each slot 12 are corrected. This recognizes the exact position of the ammeter 15. As a result, the position information of each of the ammeters 15 arranged in each of the slots 12 can be recognized, so that each ammeter 15 can be specified.

The current value of the ammeter 15 can be recognized as follows, for example. As shown in FIG. 5, the correspondence between the horizontal projection position of the tip position of the display needle 15a of the ammeter 15 from the direction of the arrow in the figure and the current value is prepared in advance. This horizontal projection position corresponds to the cosine position at the tip of the display needle 15a. The horizontal projection position of the tip position of the display needle 15a is recognized from the image of the display needle 15a taken by the image pickup camera 14, and the current value can be recognized by this. In order to make it easier to recognize the position of the tip of the display needle 15a in the image processing by the image pickup camera 14, a marker indicating the position may be provided at the tip of the display needle 15a and the center of the rotation axis.

According to the closed switchboard system 1 according to the first embodiment, the following effects are obtained.
The closed switchboard system 1 includes a control center 10, an image pickup camera 14, an image pickup camera control device 18, and a central control unit 24 that form a row board 11. An ammeter 15 is arranged in each power supply unit 16 of the control center 10. The ammeter 15 is arranged in front of the control center 10 at a position visible from the outside. An image of the ammeter 15 is taken by the imaging camera 14, and the current value is read from the parallel projection position of the tip position of the display needle 15a of the ammeter 15 that has been taken. The read current value is transmitted to the central control unit 24, and when the central control unit 24 determines that the current value is abnormal, it cuts off the electric circuit of the main power supply by controlling the magnetic switch 16c of the power supply unit 16. , Protects the load of the motor and the like controlled by the power supply unit 16. Whether or not the current value is abnormal is determined by, for example, storing threshold information for determining the current abnormality in advance in the central control unit 24 and determining whether or not the current value exceeds this threshold value.

As a result, it is possible to eliminate the signal line for transmitting the current value information from each power supply unit 16 to the central control unit 24. Since a large number of power supply units 16 are arranged in the entire row board 11, the number of signal lines connecting the power supply unit 16 and the central control unit 24 becomes enormous. According to the configuration of the closed switchboard system 1 according to the embodiment, the signal line can be eliminated, so that the configurations of the row board 11 and the control center 10 can be simplified.

As a result, the construction period of the wiring work at the time of installing the control center 10 can be shortened, and the maintainability of the control center 10 can be improved. Further, this eliminates the need for a thermal relay for protecting the heat generation of the motor due to overload operation, so that the cost of the control center 10 can be reduced and the maintainability can be improved.

Further, the signal line for transmitting the current value information of each power supply unit 16 to the central control unit 24 is only the signal line connected from the image pickup camera control device 18 of the image pickup camera 14 to the central control unit 24. .. That is, the signal lines connecting each slot 12 and the central control unit 24, that is, the number of signal lines for each slot 12 are reduced to one signal line connecting the imaging camera control device 18 and the central control unit 24. Can be done. As a result, the construction period of the wiring work at the time of installing the control center 10 can be shortened, and the maintainability of the control center 10 can be improved.

Further, when changing the configuration of the control center 10 of the column board 11, the data of the alignment coordinates of the column board 11 and the control center 10 and the coordinates of the ammeter 15 may be rewritten, so that a signal for transmitting the current value is required. This eliminates the need for time-consuming wiring work such as reconnecting wires, and shortens the wiring work period.

(Second Embodiment)
Next, the second embodiment will be described. FIG. 6 is a diagram showing a schematic configuration of the closed switchboard system 1 according to the second embodiment. The difference between the configuration of the second embodiment and the configuration of the first embodiment is that in the closed switchboard system 1 according to the first embodiment, an image of the ammeter 15 is taken by the imaging camera 14 and the current value is measured from the ammeter 15. The point is that the temperature distribution of each slot 12 of the control center 10 of the row board 11 is photographed by the infrared camera 32.

Although not shown in FIG. 6, the same column alignment mark G and local alignment mark A as in FIG. 2 are provided in the second embodiment as well, and the infrared camera is controlled from the image taken by the infrared camera 32. The device 34 recognizes the position of the slot 12, that is, the power supply unit 16. Further, the configuration of the infrared camera control device 34 is the same as the configuration of the image pickup camera control device 18 of the first embodiment.

In the second embodiment, when a current abnormality occurs, the power supply unit 16 at that location generates heat, and the temperature of the surface of the slot 12 in which the power supply unit 16 is arranged rises, so that the heat generating portion 30 is generated. Therefore, if the temperature distribution on the surface of the control center 10 of the row board 11 taken by the infrared camera 32 is analyzed, the heat generating portion 30 can be detected, and the slot 12 corresponding to the position of the heat generating portion 30, that is, the power supply unit 16 can be detected. Can be identified.

In the second embodiment, the temperature distribution of the column 11 is photographed by the infrared camera 32. The heat generating unit 30 is detected from the photographed temperature distribution, and the slot 12 corresponding to the position of the heat generating unit 30, that is, the power supply unit 16 is specified. This is the power supply unit 16 that is generating heat. When the power supply unit 16 that generates heat is specified, the central control unit 24 cuts off the electric circuit by controlling the magnetic switch 16c of the power supply unit 16 to protect the load of the motor or the like controlled by the power supply unit 16. Whether or not the slot 12 or the power supply unit 16 is generating heat is determined, for example, by storing threshold information for determining a temperature abnormality in the central control unit 24 in advance and taking a picture of the heat generating unit 30 by the infrared camera 32. It can be determined whether or not the temperature of the above exceeds this threshold value.

According to the closed switchboard system 1 according to the second embodiment, the same effect as that of the first embodiment is obtained.

Although some embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

In the first embodiment and the second embodiment, a function of changing the shooting direction is added to the image pickup camera 14 or the infrared camera 32, and a plurality of columns 11 are photographed by one image pickup camera 14 or the infrared camera 32. It may be configured.

Further, the position coordinates of the column alignment mark G and the local alignment mark A, the position map of each control center 10, and the position of the slot 12 provided in each control center 10 are stored in the storage unit of the imaging camera control device 18 or the infrared camera control device 34. The map and the position coordinates of the current meter 15 in each slot 12 are also configured to be stored in the storage unit of the imaging camera control device 18, but these functions may be provided in the central control unit 24. Alternatively, the image pickup camera control device 18 and the infrared camera control device 34 may be eliminated, and the central control unit 24 may be configured to take charge of the function of controlling the image pickup camera 14 and the infrared camera 32.

Further, although it was decided that the central control unit 24 determines the current value abnormality or the temperature abnormality, the image pickup camera control device 18 is configured to have these functions, and the image pickup camera control device 18 to the central control unit 24 have an abnormality. The position information of the slot 12 in which the above is detected may be transmitted.

1 ... Closed switchboard system, 10 ... Control center, 11 ... Row board, 14 ... Imaging camera, 16 ... Power supply unit, 16a ... Circuit breaker for wiring, 15 ... Ammeter, 18 ... Imaging camera control device, 18a ... Control unit, 24 ... Central control unit, 30 ... Heat generation unit, 32 ... Infrared camera, 34 ... Infrared camera control device

Claims (2)

A power supply unit including an ammeter arranged so that it can be photographed from the outside, a magnetic switch capable of opening and closing an electric circuit to a load, a control center having a plurality of the power supply units, and the current arranged in the control center. An image pickup camera configured to be capable of taking an ammeter, an image pickup camera control device for controlling the image pickup camera, and a central control unit configured to be able to receive information from the image pickup camera control device are provided.
The central control unit stores a horizontal projection position indicating the tip position of the display needle of the ammeter projected from a predetermined direction and a current value associated with the horizontal projection position, and is different from the predetermined direction. The horizontal projection position recognized based on the image of the display needle taken by the imaging camera from the direction is compared with the horizontal projection position stored in advance, and the current value of the ammeter is recognized, and the current value is calculated. A closed switchboard system that controls the magnetic switch to shut off the electric current of the corresponding power supply unit when it is determined to be abnormal. The closed switchboard system according to claim 1, wherein the imaging camera is configured to be capable of photographing a plurality of columns.

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