KR102468961B1 - A power management system of lecture room - Google Patents

Abstract

A classroom power management system capable of widening the signal range and operating independently of a communication line is disclosed. To this end, the present invention provides a plurality of power use devices provided in a designated classroom space, a plurality of sub-controllers connected to all of the plurality of power use devices through relay contacts, and transmitting and receiving signals to and from the plurality of sub-controllers, A main controller capable of controlling power of the plurality of power-using devices and a T directly connecting each of the sub-controllers and the main controller. tea. A TTP cable and an Ethernet connection between the main controller and the main controller. d. Provided is a classroom power management system having a personal computer connected through UDP communication, running a power management system program therein, and including a display device capable of showing the operating state of the power management system program.

Description

A power management system of lecture room}

The present invention relates to a power management system for efficiently controlling power use of all power using devices in a school classroom or when a plurality of power using devices are arranged in a certain space, and more particularly, to another A classroom power management system that can be built independently without using a communication network line and without depending on other communication systems.

In general, lecture rooms in which various types of electronic lecture equipment are used are equipped with various power use devices such as electronic lecture tables, sound devices, and lights. However, most of the control methods for turning on/off the power of equipment using such power depend on the direct control of the user and are operated by the power-using device. Accordingly, when a user does not accurately turn on or off a power-using device, unnecessary power is wasted. At the same time, when operated by a user who is not able to properly operate expensive power-using devices such as electronic lecterns or sound equipment, they often cause problems or are not used optimally.

In order to solve these problems, a stable power control management system capable of efficiently turning on or off the power of various power-using devices disposed in a certain space such as a classroom is required in an optimal state.

Korean Registered Patent No. 10-0951087 (March 29, 2010) Title of invention: Automated school power monitoring and management system

An object to be achieved by the technical idea of the present invention is to operate independently without separately using signal lines of other communication systems installed in classrooms, and to efficiently prevent waste of power of power-using devices not used in classrooms of school buildings. It is an object of the present invention to provide a classroom power management system capable of stably operating a power using device by suppressing unnecessary manipulation of the power using device.

A classroom power management system according to the present invention for achieving the above technical problem includes a plurality of power usage devices provided in a predetermined classroom space, a plurality of sub-controllers connected to all of the plurality of power usage devices through relay contacts, and the A main controller capable of transmitting and receiving signals to and from a plurality of sub-controllers and controlling power of the plurality of power-using devices, and a T directly connecting each of the sub-controllers to the main controller. tea. A TTP cable and an Ethernet connection between the main controller and the main controller. d. It is characterized by having a personal computer connected through UDP communication, running a power management system program therein, and including a display device capable of showing an operating state of the power management system program.

According to an embodiment of the present invention, it is preferable that the number of the plurality of sub-controllers is 2 ⁿ (n = natural number).

In addition, according to a preferred embodiment of the present invention, the tee. tea. A TTP cable includes a first cable capable of controlling power of the sub-controller by transmitting a square wave pulse signal from the main controller to the sub-controller, and relay contact states of a plurality of power users connected to the sub-controller. It is suitable to include a second cable to be able to send to the main controller in differential mode.

At this time, in the differential mode, it is preferable that the main controller recognizes as "0" when the voltage difference between the positive terminal and the negative terminal of the first cable is less than -0.2 V, and recognizes it as "1" when it is greater than +0.2 V. do.

Further, the power management system program may include a routine capable of individually controlling power of the plurality of sub-controllers and a routine capable of collectively controlling power of the plurality of sub-controllers.

According to the present invention described above, first, in the classroom power management system according to the present invention, the signal line connection between the main controller capable of issuing power control commands and the sub-controller in the classroom in which various power use devices are arranged is connected to a communication line. Since it is performed in differential mode transmission by the TTP cable according to the present invention, which is not related to, the transmission and reception of ON / OFF signals are farther than when using other communication cables. There is no noise loss and it can be transmitted stably without error in the protocol. Specifically, there is an advantage in that transmission and reception of an ON/OFF signal can be transmitted up to 1.2 km by simple recognition of an electrical signal according to the magnitude of the potential difference.

In addition, according to the present invention described above, in the classroom power management system according to the present invention, a signal line connection between a main controller capable of issuing power control commands and a sub-controller in a classroom in which various power use devices are arranged communicates. It is made only by a separate T.T.P (TTP) cable according to the present invention that is not related to the line. As a result, the classroom power control system can be independently operated regardless of failure or inspection of communication lines or communication equipment. In this case, a more advantageous synergistic effect can be obtained when the main body for maintenance management of the communication line/equipment is a different company from the main body for maintenance management of the power management system.

In addition, the classroom power management system according to the present invention is an Ethernet cable used as a communication line for connecting a main controller capable of issuing power control commands and a signal line of a sub-controller in a classroom in which various power use devices are disposed. Since a TTP cable, which is cheaper than a D.P (User Datagram Protocol, hereinafter referred to as 'UDP') cable, is used, cost reduction is effective.

Finally, according to the present invention described above, the on/off operation of various power use devices disposed in the classroom can be collectively performed through the sub-controller at a predetermined time, and at the same time, various power use devices disposed in the classroom can be turned on/off. Since the off operation can be performed individually, it is possible to minimize power waste that may occur in power use devices disposed in classrooms.

1 is a block diagram showing a classroom power management system according to a preferred embodiment of the present invention.
2 is a perspective view of a twisted pair cable used in a TTP cable according to a preferred embodiment of the present invention.
3 is a photograph showing a TTP cable going from a main controller to a sub controller according to a preferred embodiment of the present invention.
4 is a block diagram for explaining a TTP cable connecting a main controller and a sub controller according to a preferred embodiment of the present invention.
5 is a flowchart illustrating an operation of turning on (ON) a power use device connected to a sub-controller in a classroom power management system according to the present invention.
6 is a flowchart illustrating an operation of turning off a power using device connected to a sub controller in a classroom power management system according to the present invention.
7 is a flowchart illustrating an operation of collectively controlling power using devices connected to sub-controllers in the classroom power management system according to the present invention.
8 is an example of a display screen of a display device connected to a personal computer in a classroom power management system according to the present invention.

In order to fully understand the configuration and effects of the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and may be implemented in various forms and various changes may be applied. However, the description of the present embodiments is provided to complete the disclosure of the present invention, and to completely inform those skilled in the art of the scope of the invention to which the present invention belongs.

In the embodiments described below, terms such as first and second may be used to describe various components, but the components are not limited by the terms. The terms may only be used for the purpose of distinguishing one component from another. Singular expressions include plural expressions unless the context clearly dictates otherwise.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries are interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in this application, they are not interpreted in an ideal or excessively formal meaning. .

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a classroom power management system according to a preferred embodiment of the present invention.

Referring to FIG. 1 , a classroom power management system according to the present invention includes a plurality of power usage devices 100 provided in a predetermined classroom space 300 . The designated classroom may not necessarily be a lecture room, but may be a space in which a plurality of power use devices are densely arranged in a designated space. The power use device 100 may be a light, an electronic classroom, a sound system, or the like, and may be other electric or electronic devices that use power.

A classroom power management system according to the present invention transmits and receives signals to and from a plurality of sub-controllers 200 to which the plurality of power-using devices are all connected through relay contacts, and the plurality of power-using devices to each other. It includes a main controller 400 capable of controlling the power of. It is suitable that the sub-controller 200 is installed inside the classroom space 300 .

At this time, the number of sub-controllers 200 is 2 ⁿ (n = natural number), which may be 16, 32, 64, or 128, and a plurality of sub-controllers 200 connected to the input power sources of the power-using devices 100 therein. It is suitable to include a contact relay of The main controller 400 includes a waveform generator capable of generating a control signal, for example, a 100 ms square wave, a signal processor capable of outputting and receiving a digital signal in a differential mode, a sub-controller 200, and a personal computer ( 700) and a communication port that can be interconnected and a main controller display unit capable of displaying an operating state with an LED on the front of the device.

In addition, the classroom power management system according to the present invention directly connects each of the sub controllers 200 and the main controller 400. tea. P (TTP: Two Twisted Pair, hereinafter referred to as 'TTP', 500) cable and the main controller 400 are connected through an Ethernet UDP communication cable 600, and the power management system program runs inside and a personal computer 700 including a display device such as a monitor capable of showing the operating state of the power management system program. The personal computer 700 may be replaced with other terminal devices such as a laptop computer and a tablet computer.

2 is a perspective view of a twisted pair cable used in a TTP cable according to a preferred embodiment of the present invention, and FIG. 3 is a tee going out from a main controller to a sub controller according to a preferred embodiment of the present invention. This is a picture showing the shape of a TTP cable.

Referring to FIGS. 2 and 3 , a twisted pair cable refers to an object in which an electric wire 501 capable of transmitting two strands of signals is wrapped with an insulator 502 in a plastic cover 503 . In the present invention, the twisted pair cable is used as a material for the first cable 510 and the second cable shown in FIG. 4 .

At this time, the two wires 501 are twisted in pairs, and if there is a strong electromagnetic signal around the straight disconnected wire, an induced electromotive force is generated and electricity flows. If this disconnected wire is used as a signal cable, noise is generated and the signal This is to cancel electromagnetic interference by twisting and using two wires as a pair, as shown in the drawing. 3 shows a state in which four groups of twisted pair cables 530, 540, 550, and 560 are gathered and connected from a main controller (400 in FIG. 1) to a sub-controller (200 in FIG. 1).

Referring to FIG. 4 , the TTP cable 500 connected from the main controller 400 to the sub controller 200 includes two signal lines, for example, first cables 510A, 510B, and 510C and second cables 520A, 520B, 520C). In the drawing, three sub-controllers 200 are shown as an example, but as described above, 2 ⁿ (n = natural number) can be applied.

At this time, the first cables 510A, 510B, and 510C and the second cables 520A, 520B, and 520C perform unidirectional communication as indicated by arrows, rather than bidirectional communication as in general communication. Specifically, a first cable capable of controlling power of the sub-controller 200 by generating and transmitting a square wave pulse signal, for example, a 100 ms square wave only once, from the main controller 400 to the sub-controller 200 ( 510A, 510B, 510C) and the relay contact state of a plurality of power users 100 connected to the sub-controller 200 in differential mode through TTP+ (power users ON) and TTP- (power users OFF) signals It includes second cables 520A, 520B, and 520C that can transmit a (differential mode) signal to the main controller 400.

Accordingly, the sub controller 200 and the main controller 400 are connected to each other by a TTP cable 500, for example, two (510, 520) twisted pair cables. At this time, the main controller 400 transmits on/off signals to the plurality of power users 100 as square waves through the first cable 510, and the sub controller 200 transmits the on/off signal to the plurality of power users 100 through the second cable 520. The connection state of the relay contacts for the plurality of power usage devices 100 is transmitted.

5 is a flowchart illustrating an operation of turning on (ON) a power use device connected to a sub-controller in a classroom power management system according to the present invention.

Referring to FIG. 5, first, by the operation of the power management system program, which is a program operating on a personal computer (PC), a signal to turn on power consuming devices, which are electric devices, is transmitted to the main controller through an Ethernet UDP cable (S100) do. The main controller transmits the TTP+ signal and the 100 ms square wave differential mode signal in which the potential difference between the + line and the - line in the first cable of FIG. 4 is 0.2 V or more to the sub controller only once (S110).

Then, the sub-controller recognizes the differential mode signal (S120), adjusts the connection state of the internal relay contact, and performs an operation of turning on the power of the electric device (S130).

At the same time, the sub-controller transmits a TTP+ signal to the main controller through the second cable of FIG. 4 (S140), and the main controller transmits the turned-on state (On) of all power-using devices to a personal computer (through Ethernet UDP cable). PC) is sent. At this time, the personal computer adjusts the state of the display screen as shown in FIG. 8 appropriately.

6 is a flowchart illustrating an operation of turning off a power using device connected to a sub controller in a classroom power management system according to the present invention.

Referring to FIG. 6 , by the operation of the power management system program of the personal computer (PC), a signal (OFF) for power consuming devices, which are electrical devices, is transmitted to the main controller through an Ethernet UDP cable (S200). The main controller transmits a TTP+ signal, specifically a 100 ms square wave differential mode signal in which a potential difference between the + line and the - line in the first cable of FIG. 4 is 0.2 V or more, to the sub controller only once (S210).

Then, the sub-controller recognizes the differential mode signal (S220), adjusts the connection state of the internal relay contact, and performs an operation of turning off the power of the electric device (S230).

Meanwhile, the sub-controller transmits a TTP- signal, specifically a signal in which the potential difference between the + line and the - line of the second cable, the twisted pair cable, is less than -0.2V to the main controller through the second cable of FIG. 4 (S240), , The main controller transmits the off state (Off) of all power using devices to a personal computer (PC) through an Ethernet UDP cable. At this time, the personal computer adjusts the state of the display screen as shown in FIG. 8 appropriately.

7 is a flowchart illustrating an operation of collectively controlling power using devices connected to sub-controllers in the classroom power management system according to the present invention.

Referring to FIG. 7, batch power control is performed by the operation of a power management system program, which is an application program running on a personal computer, and can perform a function of turning on or off all power consuming devices in the classroom at a fixed time. , in detail, it is as follows.

First, the power management system program of the personal computer monitors the clock built into the personal computer, and when the first time, which is the time to collectively turn on the power of all power-using devices, starts operation (S300). Then, as shown in FIG. 5, the main controller transmits the TTP+ signal, specifically, the square wave signal of 100 ms to the sub controller (S310). Then, the sub-controller recognizes the TTP+ signal (S320) and performs an operation (S330) of turning on the power of all electric devices, that is, power users.

Subsequently, the power management system program of the personal computer continues to monitor the clock built into the personal computer, and when the second time, which is the time to collectively turn off the power of all power-using devices, starts operating again (S340). . Then, as shown in FIG. 6 described above, the main controller transmits a TTP+ signal, specifically, a square wave signal of 100 ms to the sub controller (S350). Then, the sub-controller recognizes the TTP+ signal (S360), and performs an operation (S370) to turn off the power of all electrical devices that use power.

8 is an example of a display screen of a display device connected to a personal computer in a classroom power management system according to the present invention.

Referring to FIG. 8 , a routine for individually controlling power of sub-controllers in a power management system program operating in a personal computer will be described. The display screen 710 shows an operating state of the power management system program.

“Setting” 712, an icon displayed on the upper left, is used to open a setting screen as a pop-up. In the drawing, icons 210A, 210B, 210C, and 210D in the horizontal direction are icons indicating the state of each sub-controller. Each of the sub-controllers 210A, 210B, 210C, and 210D includes eight power use devices. These 8 power use devices are just examples, and the number can be adjusted according to designers.

Each of the power consuming devices (4 X 8) includes an on/off icon, and the operator clicks the on/off icon to turn on or off each power consuming device. action can be performed. In the drawing, reference numerals 320 and 330 are icons that perform "All On" and "All Off" functions, and perform a function of simultaneously turning on or off all power consuming devices regardless of time on the display screen. In addition, the "Close" icon 714 at the top right is an icon used to end the display screen 710 of the power management system program.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

100: power usage device, 200: sub-controllers,
300: classroom space, 400: main controller,
500: TTP cable, 510: first cable,
520: second cable, 600: Ethernet UDP communication cable,
700: personal computer, 710: display screen of a personal computer.

Claims (7)

A plurality of power use devices provided within a designated classroom space;
a plurality of sub-controllers to which all of the plurality of power usage devices are connected through relay contacts;
a main controller capable of transmitting and receiving signals to and from the plurality of sub-controllers and controlling power of the plurality of power-using devices;
A first cable capable of directly connecting each of the sub-controllers and the main controller and controlling power of the sub-controller by transmitting a square wave pulse signal, which is a TTP+ signal, from the main controller to the sub-controller; A T including a second cable capable of transmitting relay contact states of a plurality of connected power devices to the main controller using a TTP+ or TTP- signal. tea. blood (TTP) cable;
The above main controller and Ethernet connection. d. Classroom power management comprising a personal computer connected through a UDP communication cable, running a power management system program therein, and including a display device capable of showing an operating state of the power management system program system. According to claim 1,
The plurality of sub-controllers, the classroom power management system, characterized in that the number of 2 ⁿ (n = natural number). delete delete According to claim 1,
The TTP+ signal of the second cable,
The main controller recognizes that the voltage difference between the positive terminal and the negative terminal of the second cable is +0.2 V or more as “1”, and the value of the ON state in which the electrical device of the sub controller is turned on is converted to the Ethernet UDP cable. to a personal computer via
The TTP-signal of the second cable is
The main controller recognizes that the voltage difference between the positive terminal and the negative terminal of the second cable is less than -0.2 V as "0", and the value in the OFF state when the electric device of the sub controller is turned off is converted to the Ethernet UDP cable. Classroom power management system, characterized in that for transmitting to a personal computer through. According to claim 1,
The power management system program of the personal computer,
Classroom power management system, characterized in that it comprises a routine capable of individually controlling the power of the plurality of sub-controllers. According to claim 1,
The power management system program of the personal computer,
Classroom power management system, characterized in that it comprises a routine capable of collectively controlling the power of the plurality of sub-controllers.

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