KR102516073B1 - Smart meter using non-contact current control measuring IC and fixing support - Google Patents

Abstract

The present invention relates to a smart meter using a non-contact current measurement IC and a fixed support. The present invention includes a data calculation unit, a central processing unit for processing data measured by each sensor, and a memory unit for storing active and reactive power amounts, maximum demand power, power factor, and watt-hour meter information in the central processing unit, On the surface of the smith meter, a switch unit capable of setting and manipulating the meter, a power supply circuit unit supplying operating power to the smart meter, a signal output unit controlling the customer's load and managing signal output, and a pulse output error pulse A smart meter that measures the amount of electricity, consisting of an LCD display device that displays the meter reading value, time, date, status, error, etc. A 'c'-shaped cable extending from one side of the smart meter in the horizontal direction and connecting the smart meter and the fixed support and a rectangular member and lower members are formed on both sides of the rectangular member in a downward direction, The lower member includes at least one fixed support having a through hole through which the cable passes, and a non-contact current measurement IC fixed to the bottom surface of the rectangular member to measure current.

Description

Smart meter using non-contact current control measuring IC and fixing support}

The present invention relates to a smart meter using a non-contact current measurement IC and a fixed support, and more specifically, to reduce the size of the meter and measure AC voltage and current by directly connecting it to an AC and DC power distribution system, thereby valid and invalid used by consumers. It relates to a smart meter using a non-contact current measurement IC and a fixed support that can measure and display power consumption, maximum demand power measurement, and power factor.

In general, a smart meter is a strategic meter (Watthour Meter), and the meter value of an electric meter that measures and measures the active power of a connected circuit is the amount of power consumed in the circuit during the measurement time, and the unit is mainly kWh.

The watt-hour meter as described above is a watt-hour meter that enables ordinary households to measure electricity bills in units of time. It measures power consumption in detail and performs functions such as remote supply connection/disconnection, power quality monitoring, remote meter reading and billing.

However, referring to FIGS. 1 and 2, most of the conventional electricity meters (meters) connect a current sensor of the CT (ammeter) method, which is produced by winding a coil around a shunt and a core as much as the winding ratio, to the power input terminal of the watt-hour meter and the load output terminal. The amount of power is measured by connecting to a cable or current bar.

However, as shown in FIG. 3, since the size of the current sensor increases according to the maximum size of the measured current in this method, the size of the smart meter, which is a power meter, also increases. In addition, the current sensor of the CT method has a disadvantage of measuring only the AC current.

Therefore, even if the maximum size of the measured current changes, there is a need to develop a smart meter and its accessories that can maintain a constant size of the smart meter so that the size of the smart meter that measures a large amount of current can be miniaturized. come.

Korean Utility Model Publication No. 2009-0004407 Korean Patent Publication No. 2012-0040221 Republic of Korea Patent Application No. 2015-0018026

Therefore, the present invention utilizes a non-contact current measuring IC that is very small in size compared to a CT-type current sensor and enables to measure high current, so that even if the maximum size of the measured current changes, the smart meter can maintain a constant size The purpose of this study is to provide a non-contact current measurement IC capable of miniaturizing the size of a smart meter capable of measuring large current and a smart meter using a fixed support.

In addition, a non-contact current measurement IC designed to be able to remotely control time-by-time metering and customer load, and to apply and use functions such as firmware update, security, and two-way communication (PUSH) in consideration of future functional expandability, and An object of the present invention is to provide a smart meter using a fixed support.

In order to solve this problem, the present invention relates to a smart meter using a non-contact current measurement IC and a fixed support, a data calculation unit is built-in, and a central processing unit processing data measured by each sensor and the central processing unit A memory unit for storing active and reactive power amount, maximum demand power, power factor, and watt-hour meter information, and a switch unit capable of setting and operating the meter on the surface of the smitt meter, and a power circuit unit supplying operating power to the smart meter, A signal output unit that controls the consumer's load and manages signal output, a pulse output unit that outputs error pulses, an LCD display device that displays meter readings, time, date, status, errors, etc., and wired and wireless communication methods. A smart meter that measures the amount of power and a 'c'-shaped cable that extends horizontally on one side of the smart meter and connects the smart meter and the fixed support. And lower members are formed on both sides of the square member and the square member in a downward direction, and at least one fixed support having a through hole for allowing the cable to pass through the lower member, respectively, and the bottom surface of the square member It is characterized in that it includes a non-contact current measurement IC fixed to and measuring current.

In addition, the non-contact current measuring IC is characterized in that it receives data through the cable and transmits the output of the non-contact current measuring IC to the meter reading server of the smart meter.

In addition, the height of the non-contact current measurement IC and the cable is the same as each other.

The measuring unit is characterized in that it collects data measured by the non-contact current measuring IC and calculates a value detected by the sensor.

Therefore, the present invention attaches a non-contact current measurement IC to a fixed support, so that a constant size of the smart meter can be maintained even if the maximum size of the measured current changes, so that a large current can be easily measured, and the size of the smart meter can be easily measured. It has the effect of providing a smart meter using a non-contact current measuring IC and a fixed support, which has the advantage of miniaturization design.

1 is a photograph of a current sensor in conventional use.
Figure 2 is a picture of fastening the current sensor to the smart meter.
Figure 3 is a picture comparing the size of the current sensor for each current capacity.
4 is a structural diagram of a smart meter;
5 is a configuration diagram of a non-contact current measuring IC support.
6 is a view showing that a non-contact current measurement IC is installed;
Fig. 7 is an operation diagram of a non-contact current measurement IC;
8 is a photograph of a non-contact current measurement IC fastened to a cable using a support.
9 is a bottom view photograph of a non-contact current measurement IC fastened to a support rod to a cable.
10 is a side view of applying a non-contact current measurement IC to a smart meter using a support.
11 is a flowchart illustrating a process of measuring power amount using a non-contact contact current measurement IC in a smart meter.
12 is a firmware system of a smart meter.
13 is a block diagram of an inspection server and a control server.
14 is a flowchart illustrating a process of upgrading firmware using low power blue communication.
15 is a flowchart illustrating a firmware upgrade process of an IoT terminal.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings.

In addition, in the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

In addition, since the terms used in this application are only used to describe specific embodiments, it is not intended to limit the present invention, and it is clear in advance that a singular expression also means a plurality of expressions unless the context clearly indicates otherwise. want to leave

Prior to explaining the present invention, it should be clarified in advance that an IC in a non-contact current measurement IC, which is one of the terms used in this specification, is an integrated circuit (IC).

4 is a structural diagram of a smart meter, FIG. 5 is a configuration diagram of a non-contact current measuring IC support, FIG. 6 is a diagram showing that a non-contact current measuring IC is installed, FIG. 7 is an operation diagram of the non-contact current measuring IC, FIG. 8 Figure 9 is a picture of the non-contact current measuring IC fastened to the cable using the support, Figure 9 is a picture of the bottom of the non-contact current measuring IC fastened to the cable, Figure 10 is a non-contact current measuring IC to the smart meter using the support 11 is a flowchart showing the process of measuring the amount of power using a non-contact contact current measuring IC in a smart meter, FIG. 12 is a firmware system of a smart meter, and FIG. 13 is a block of a meter reading server and a control server FIG. 14 is a flowchart showing a process of upgrading firmware with low power blue communication, and FIG. 15 is a flowchart showing a process of upgrading firmware of an IoT terminal.

Referring to FIG. 4, it is an overall structural diagram of the smart meter 100. The smart meter 100 collects data and calculates and processes numerical data such as power value or amount of power in real time. is built in, and a central processing unit 10 for processing data measured by each sensor (not shown) is formed. It includes a memory unit 12 for storing information.

In addition, a metering unit 13 for measuring the amount of power consumed by the customer is formed, and the metering unit 13 stores the measured value in the memory unit 12 of the central processing unit 10. Also, the memory unit 12 is a non-volatile storage medium capable of reading and writing digital data, and functions and serves to store and maintain various types of information required to operate the smart meter 100.

In addition, on the surface of the smitt meter 100, a switch unit 20 capable of setting and operating the smart meter 100, a power circuit unit 30 supplying operating power to the smart meter 100, and a consumer A signal output unit 40 for managing load control and signal output and a pulse output unit 50 for outputting error pulses are formed.

Then, an LCD display device 60 is formed to visually display the meter reading value, time, date, status, error, etc. of the smart meter 100 through a display window (not shown).

And, it consists of a communication unit 80 that transmits the meter reading data to the meter reading server 70 using a wired or wireless communication method.

The control means 110 includes a ROM (ROM: 111), a RAM (RAM: 112), and a control unit 113. The ROM 111 stores firmware, which is a program command for operating the smart meter 100, and the RAM 112 temporarily stores data to be immediately accessed by the controller 113.

The content of the program stored in the ROM 111 can be configured in various ways according to required functions and can be updated at any time, so it must be possible to write.

The controller 113 controls the smart meter 100 as a whole by operating according to program commands stored in the ROM 111 .

In particular, the control unit 113 receives firmware update information from the inspection server 70 through the communication unit 80 in relation to firmware update, stores it in the ROM 111, and performs the update at a specific time in the future. Take care.

Regarding receiving the firmware update information, the control unit 113 periodically accesses the inspection server 70 through the communication unit 80 to check whether the latest version of the firmware or its module exists, When there is new firmware or a module thereof, a download request may be made to the inspection server 70 . In addition, the meter reading server 70 performs a firmware update in association with the control server 350, which will be described later.

Referring to FIG. 5 , it is a configuration diagram of the non-contact current measuring IC support 200 .

As shown, the non-contact current measurement IC support 200 serving as a fixed support is provided with a minimum of 1 to a maximum of 6 square members 210, and both sides of the square member 210 have a predetermined lower part. Members 220 are formed in a downward direction, and through-holes 230 are formed in the lower members 220 to allow cables 240 to pass therethrough.

In addition, the cable 240 extends horizontally from one side of the smart meter 100 and is formed in a 'c' shape connecting the smart meter 100 and the non-contact current measuring IC support 200. For reference, if the current is 100A or more, the cable 240 is replaced with a current bar (not shown). A description of the configuration and detailed illustration of the connection between the cable 240 and the smart meter 100 are well known and will be omitted.

Referring to FIG. 6, a non-contact current measuring IC support 200 configured as in FIG. 5 fixedly coupled to the bottom surface of the rectangular member 210 using a PCB (Printed Circuit Board: not shown) is measured. A current measuring IC 250 is formed.

Referring to FIG. 7, briefly explaining the operation of the non-contact current measuring IC 250, when an arbitrary conductor flows from the bottom, the non-contact current measuring IC 250 can measure magnetism. In the inside state, if the non-contact current measuring IC 250 is maintained at a certain height, it can sense current by itself.

8 shows that the cables 240 are fastened to each other through the respective through-holes 230 at the bottom of the three rectangular members 210 shown using the non-contact current measuring IC support 200 .

9 is a bottom view of the non-contact current measuring IC support 200 fastened to the cable 240, and the non-contact current measuring IC 250 is fixed to the bottom of the square member 210 of the non-contact current measuring IC support 200. What has happened is shown.

10 is a side view showing that the non-contact current measurement IC 250 is connected to the smart meter 100 by connecting the fixed non-contact current measurement IC support 200 through a cable 240 and applied.

In addition, the output of the non-contact current measurement IC 250 is received by the central processing unit 10 of the smart meter 100, and the value calculated by the data calculation unit 11 of the central processing unit 10 is transferred to the meter reading server. forwarded to (70). Then, the data calculation unit 73 (see FIG. 12) of the inspection server 70 collects data measured by the non-contact current measuring IC 250 and calculates a detected value. The calculated value is transmitted back to the central processing unit 10 of the smart meter 100.

Another feature of the present invention is that the non-contact current measuring IC support 200 to which the non-contact current measuring IC 250 is attached is always maintained at a constant height no matter what cable 240 is connected to each other.

This maintains a constant height regardless of the thickness of both the busbar (not shown) or the cable 240, and the non-contact current measuring IC 250 on the bottom of the non-contact current measuring IC support 200 presses the cable 240 By giving it to be fixed, separation and flow are prevented, and a constant height is always maintained. Therefore, the heights of the non-contact current measuring IC 250 and the cable 240 are always the same.

That is, the non-contact current measurement IC 250 PCB-coupled to the non-contact current measurement IC support 200 through the cable 240 connecting the smart meter 100 and the non-contact current measurement IC support 200 provides power and data is to be supplied.

Hereinafter, a description of a method of measuring current using the non-contact current measurement IC 250 in the smart meter 100 will be described with reference to FIG. 11 .

First, the non-contact current measurement IC 250 is attached to the non-contact current measurement IC support 200 (first step).

In the above step, the non-contact current measuring IC support 200 is attached using a printed circuit board (PCB).

Next, the cables 240 are inserted into the through-holes 230 respectively formed in the non-contact current measuring IC supports 200 to which the non-contact current measuring ICs 250 are attached (second step).

In the second step, cables 240 are inserted into each non-contact current measurement IC support 200 . Therefore, power and data are transmitted to the non-contact current measuring IC 250 through the cable 240 and the PCB of the first step.

Next, the cable 240 is fitted and inserted into the coupler (not shown) of the smart meter 100 (third step).

When coupled to the smart meter 100 in the manner mentioned in the above step, the non-contact current measuring IC 250 of the non-contact current measuring IC support 200 passes through the cable 240 to the center formed in the smart meter 100. An output is received from the processing device 10 and a value measured through the data calculation unit 11 is transmitted to the inspection server 70 .

Next, the meter reading server 70 converts the measurement value received in the third step into meter reading data measured through the internal data calculation unit 73 to calculate the electricity rate (fourth step). In this way, the measured amount of power is converted into an electric charge and transmitted to the consumer. A detailed description of how the data calculation unit 73 calculates the electric charge in the fourth step will be described later.

Therefore, even if the maximum value of the measured current is changed using the non-contact current measuring IC 250 coupled to the non-contact current measuring IC support 200 according to the present invention, the size of the smart meter 100 remains constant without changing. It is possible to measure large-capacity current with one unit, and it also has the economical advantage of being able to measure not only direct current but also alternating current.

Hereinafter, the firmware system 300 using the smart meter 100 will be described with accompanying drawings.

As shown in FIG. 12, the firmware system 300 includes an IoT system 310, a repeater 330, an IoT platform 340, a control server 350, and a plurality of terminals 370 such as smart phones. and the inspection server 70 in the above-described embodiment.

The IoT system 310 is composed of one IoT terminal 320 digitally connected to one smart meter 100 .

That is, the firmware system 300 is a system for a case where the IoT system 310 is installed in a plurality of customers respectively.

The repeater 330 is disposed between the IoT system 310 and the IoT platform 340 . At this time, the repeater 330 is connected to the IoT system 310 through the LoRa communication network (A), and is connected to the IoT platform 340 through the Internet communication network (B).

The repeater 330 may also collect meter reading data on power usage of the smart meter 100 transmitted from the IoT terminal 320 .

In addition, the repeater 330 transmits the collected meter reading data on power usage of the smart meter 100 to the IoT platform 340 .

The IoT platform 340 is disposed between the repeater 330 and the control server 350 . At this time, the IoT platform 340 is connected to the repeater 330 through the internet communication network B, and is connected to the control server 350 through a virtual private network (VPN) for security. Here, the IoT platform 340 is an open platform, serves as a medium for connecting the IoT terminal 320 and the control server 350, and provides IoT services to the control server 350. That is, the IoT terminal 320 and the control server 350 communicate with each other through the IoT platform 340 .

The IoT platform 340 provides the inspection data acquired from the IoT terminal 320 to the control server 350, and the inspection method, frequency, and time of the smart meter 100 transmitted from the control server 350. The same control method is provided to the IoT terminal 320 as well.

The control server 350 is connected to the IoT platform 340 through a virtual private network (C). Through this, the control server 350 extracts meter reading data about the power consumption of the smart meter 100 transmitted from the IoT terminal 320 and received by the IoT platform 340 via the repeater 330. and save

In addition, the control server 350 is connected to the customer terminal 370 on the consumer side. In this way, when the customer terminal 370 on the customer side is connected to the control server 350, the control server 350 can read the smart meter 100 with the customer terminal 370 on the customer side, for example, a smart phone or PC. It is possible to provide information such as power consumption according to the meter reading frequency and meter reading time, and the status of the smart meter 100, so that customer satisfaction can be realized.

Hereinafter, a method of extracting a unique ID value and updating a new firmware will be described.

The IoT system 310 installed in each of the plurality of consumers transmits meter reading data including each amount of power consumption, and the repeater 330 collects these meter reading data and transmits them to the IoT platform 340 .

At this time, in order to identify meter reading data, a unique ID value is assigned to each IoT system 310 . Therefore, when the IoT system 310 transmits meter reading data, it also transmits its own ID value. Accordingly, the control server 350 extracts and stores meter reading data for each IoT system 310 received by the IoT platform 340 and a unique ID value assigned thereto.

Referring to FIG. 13 , the reception unit 71 of the inspection server 70 transmits meter reading data for each IoT system 310 transmitted from the control server 350 and each data assigned to the IoT system 310. Receives the unique ID value of

In addition, the data calculator 73 compares and determines the unique ID value received by the receiver 71 with the unique ID value of the IoT system 310 previously stored in the first database 72, and determines that the unique ID values match. The electric charge for the smart meter 100 of the IoT system 310 is also calculated based on the pre-stored cumulative meter reading data and the rate of change of the meter reading data received by the receiver 71.

In addition, the second database 74 stores data on electricity rates through the data calculation unit 73, and the control server 350 receives and transmits the electricity rate data stored in the second database 74. An electronic bill for the received electricity bill is generated and displayed on the terminal 370 so that customers can check it.

Meanwhile, the control server 350 also provides a service of displaying information about the corresponding smart meter 100 to the terminals 370 on the side of a plurality of consumers. In addition, a plurality of user-side terminals 370 are connected to the corresponding IoT terminal 320 through Bluetooth Low Energy communication (D), and transmit new firmware data wirelessly through the Bluetooth Low Energy communication (D) to the corresponding IoT terminal. Send to (320).

14 is a flowchart illustrating a process in which the firmware system 300 performs a firmware upgrade, which will be described with reference to FIG. 12 as well.

The above upgrade method is a method of upgrading the firmware using Bluetooth low energy communication (D).

As shown, a message display step (S1), a firmware download step (S2), a Bluetooth low energy communication activation step (S3), a firmware transmission step (S4), and a firmware upgrade step (S5) are included.

First, in the message display step (S1), the control server 350 displays a download message for new firmware data on the customer terminal 370 (hereinafter referred to as terminal).

Next, in the firmware download step (S2), the terminal 370 such as a smart phone accesses the control server 350 and downloads new firmware data.

Next, in the activation step (S3) of Bluetooth low energy communication (D), the terminal 370 transmits the new firmware data downloaded to the IoT terminal 320 through Bluetooth low energy communication (D) with the IoT terminal 320. ) is activated.

Then, the IoT terminal 320 is digitally connected to the fixed electronic device and is connected to the control server 350 through a public network including the LoRa communication network (A). In this case, the fixed electronic device may include an electronic watt-hour meter such as the smart meter 100, as well as a water meter and a gas meter.

Next, in the firmware transmission step (S4), the terminal 370 transmits the new firmware data downloaded from the control server 350 to the IoT terminal 320 through activated Bluetooth Low Energy communication (D).

Finally, in the firmware upgrade step (S5), the IoT terminal 320 upgrades the existing firmware with the new firmware data received from the terminal 370.

Here, the new firmware data downloaded by the terminal 370 by accessing the control server 350 may include firmware for converting the LoRa communication network A into a private network. Through this, the LoRa communication network A, which is a public network, is easily converted into a private network.

15 is a flowchart illustrating a process of upgrading the firmware of the IoT terminal 320.

As shown, in the new firmware display step (S101), the control server 350 displays and displays a download message for the new firmware data input and stored by the administrator on the terminal 370.

In the next step, in the new firmware download step (S102), the terminal 370 receives a download message from the control server 350, and then accesses the control server 350 to download new firmware data.

When the IoT terminal 320 needs a firmware upgrade, for example, when converting the LoRa communication network (A), which is an existing public network, to a private network, in the new firmware transmission step (S103), the received from the control server 350 New firmware data for the IoT terminal 320 is transmitted to the IoT terminal 320 through low energy Bluetooth communication (D).

After the new firmware transmission step (S103) as described above is performed by wireless communication, in the firmware upgrade step (S104), the existing firmware in which the IoT terminal 320 is installed is converted to new firmware data received from the terminal 370. is to upgrade.

Those skilled in the art to which the present invention pertains as described above will understand that it can be implemented in other specific forms without changing the technical spirit or essential characteristics of the present invention. Therefore, it should be understood that the above-described embodiments are illustrative and not limiting.

The scope of the present invention is indicated by the appended claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be construed as being included in the scope of the present invention. do.

10: central processing unit 11: data operation unit
12: memory unit 13: metering unit
20: switch unit 30: power circuit unit
40: signal output unit 50: pulse output unit
60: display device 70: meter reading server
71: reception unit 72: first database
73: calculation unit 74: second database
80: communication unit 90: wire
100: smart meter 110: control means
111: ROM 112: RAM
113: control unit 200: support
210: square member 220: lower member
230: through hole 240: cable
250: non-contact current measurement IC 300: firmware system
310: IoT system 320: IoT terminal
330: repeater 340: IoT platform
350: control server 370: terminal
A: LoRa communication network B: Internet communication network
C: Virtual Private Network D: Bluetooth Communication

Claims (4)

In a smart meter using a non-contact current measurement IC and a fixed support,
A data calculation unit is built in, and a central processing unit for processing data measured by each sensor and a memory unit for storing active and reactive power amounts, maximum demand power, power factor, and watt-hour meter information are included in the central processing unit, and the smart meter On the surface of the switch unit capable of setting and manipulating the meter, the power circuit unit supplying operating power to the smart meter, the signal output unit controlling the customer's load and managing signal output, the pulse output unit outputting error pulses, and the A smart meter composed of an LCD display device displaying the meter reading value, time, date, status, error, etc. of the smart meter and a communication unit that transmits the meter reading data to the meter reading server using a wired or wireless communication method and measures power consumption;
A 'c'-shaped cable extending in a horizontal direction from one side of the smart meter and connecting the smart meter and the non-contact current measuring IC support;
at least one non-contact current measuring IC supporter having a rectangular member and a lower member having a predetermined shape downwardly formed on both sides of the rectangular member and having a through hole through which the cable passes through the lower member; and
a non-contact current measurement IC fixed to the bottom surface of the rectangular member and measuring current; including,

The non-contact current measuring IC,
Whenever a conductor is located around and current flows, the cable is pressed and fixed on the bottom of the non-contact current measuring IC support, and the magnetic field is measured by maintaining only the set height at the same height as the cable, thereby measuring the non-contact measure current,

The smart meter,
A first step of supplying power to the non-contact current measuring IC through the cable whenever non-contact current measurement is performed in conjunction with the non-contact current measuring IC supported by the non-contact current measuring IC support via the cable;
A second step of receiving measurement data by the non-contact current measurement IC supplied with the power:
a third step of receiving the output of the non-contact current measurement IC from the central processing unit; and
a fourth step of transmitting the value calculated by the data calculation unit of the central processing unit based on the received output to the inspection server;
A smart meter using a non-contact current measurement IC and a fixed support comprising a.
delete delete According to claim 1,
The smart meter using the non-contact current measuring IC and the fixed support, characterized in that the meter reading server collects the data measured by the non-contact current measuring IC and calculates the detected value.

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