JP2006109634A - Electric appliance operation detector, power monitoring system, and apparatus, method, program, and recording medium for power monitoring - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power monitoring system that can be used in a house already built, is at a lower price as a whole than systems in the past, and does not consume extra power in power consumption detection, and a method for the power monitoring system. <P>SOLUTION: The power monitoring system includes: electric appliance operation detectors each of which has a hole and transmits an operation signal, indicating that an electric appliance is in operation, according to the current passed through the power cable of the electric appliance inserted into the hole; and a power monitoring device that monitors the power consumed in the entire house by the operation signals transmitted from the electric appliance operation detectors. The power monitoring device includes: a data base in which tables indicating correspondence between identification numbers, electric appliance names, and power consumptions are stored; a power consumption extracting unit that detects identification signals from operation signals received from the electric appliance operation detectors, and extracts the power consumptions corresponding to the identification signals from the data base; and a power consumption computation unit that totalizes the extracted power consumptions and outputs the result of totalization as the total power consumption of the house. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electrical appliance operation detector that detects the operating status of electrical appliances such as home electrical appliances used in the home (hereinafter collectively referred to as electrical appliances), sequentially monitors the amount of electric power used by the electrical appliances, and outputs the monitoring results. The present invention relates to a power monitoring system and a method thereof.

In recent years, household appliances have been electrified, and various electric appliances have been frequently used.
Here, the maximum power consumption is set by the contract between the power company and each household for the power consumption per unit time in each household. If this maximum power consumption is exceeded, the contract is exceeded. It is detected as an overuse state, the breaker is in a power-off state (a state where the breaker has been dropped), and once the power is not supplied to the outlet in each home.
For this reason, a detector is provided for each outlet connected to the electrical appliance that is in operation, and a monitoring device collects data on the amount of power used by the LAN (local area network). A system that monitors the amount of power used in the home by integrating these has been considered (see Patent Document 1).
JP 09-84146 A

  However, in the power management system shown in Patent Document 1, it is necessary to provide a power detector in advance for each outlet provided in the building and to connect each power detector to the LAN. On the other hand, there is a problem that the installation of the power detector and the LAN is very expensive due to the construction work of the power detector and the LAN.

Moreover, in the power management system shown in Patent Document 1, the power detector always operates to detect the amount of power, so that the power detector always consumes power, and power detection is performed for power saving. This is contradictory from the viewpoint of doing.
Furthermore, in the power management system shown in Patent Document 1, it is necessary to provide power detectors in all indoor outlets, and there is a drawback that the price of the system becomes very expensive.

  The present invention has been made in view of such circumstances, and can be used in a home that has already been constructed. The entire system is lower in price than in the past, and extra power is used for detecting power consumption. It is an object of the present invention to provide a power monitoring system and method that does not consume power.

  The electrical appliance operation detector according to claim 1 has a hole, and passes a power cable of the electrical appliance through the hole to generate a voltage according to a current flowing through the power cable, and the voltage And a transmitter for driving and transmitting an operation signal indicating that it is in an operating state.

  The appliance operation detector according to claim 2 is the appliance operation detector according to claim 1, wherein the transmitter adds an identification signal to the operation signal and transmits the operation signal. The electrical appliance operation detector according to Item 1.

  The appliance operation detector according to claim 3 is the appliance operation detector according to claim 1 or 2, wherein the current sensor is a toroidal coil.

  The appliance operation detector according to claim 4 is the appliance operation detector according to any one of claims 1 to 3, and when the voltage exceeds a predetermined voltage value, And a power supply regulator for supplying to the transmitter.

  The appliance operation detector according to claim 5 is the appliance operation detector according to any one of claims 1 to 4, wherein the current sensor is a set value corresponding to the amount of power consumption of each appliance. Based on the above, the ratio of converting the current flowing through the power cable into a voltage is adjusted.

  The electrical appliance operation detector according to claim 6 is the electrical appliance operation detector according to claim 4, wherein the power supply adjuster is configured to output the voltage based on a set value corresponding to power consumption of each electrical appliance. Is converted into a drive voltage.

  The electrical appliance operation detector according to claim 7 is the electrical appliance operation detector according to any one of claims 1 to 6, wherein the current sensor is configured by a divided block, and It has an attachment mechanism.

  An electric power monitoring system according to an eighth aspect of the present invention receives a plurality of electric appliance operation detectors according to any one of the second to seventh embodiments and an operation signal transmitted from the electric appliance operation detector. A power monitoring system having a power monitoring device for monitoring a power consumption amount of the product, wherein the power monitoring device receives a database storing a correspondence table of the identification number, the name of the electrical appliance, and the power consumption amount; A power consumption extraction unit that detects an identification signal from the activated operation signal, extracts the power consumption corresponding to the detected identification signal from the database, and integrates the extracted power consumption to output as a total power consumption And an electric energy calculator.

  A power monitoring system according to a ninth aspect is the power monitoring system according to the eighth aspect, wherein the total power consumption calculated by the power consumption calculating unit is a maximum consumption that can be consumed by each household that is determined in advance. It has a consumption monitoring unit that outputs an alarm when a predetermined ratio of the electric energy is exceeded.

  A power monitoring method according to claim 10 receives an operation signal transmitted from the appliance operation detector according to any one of claims 2 to 7 and monitors power consumption of a plurality of appliances. A power monitoring method, a data storage process for storing a correspondence table between the identification number, the name of the electrical appliance and the amount of power consumption in a database, and detecting the identification signal from the received operation signal, and the consumption corresponding to the detected identification signal It is characterized by having a power consumption amount extracting process for extracting the power amount from the database, and a power consumption amount calculating process for integrating the extracted power consumption amounts and outputting them as a total power consumption amount in the home.

  A program according to an eleventh aspect of the invention receives an operation signal transmitted from the electric appliance operation detector according to any one of the second to seventh aspects, and performs a monitoring process of power consumption of a plurality of electric appliances. A data storage process for storing a correspondence table between the identification number, the name of the electrical appliance and the power consumption in a database, and detecting the identification signal from the received operation signal, and the power consumption corresponding to the detected identification signal It can be operated by a computer characterized by having a power consumption extraction process for extracting the power consumption from the database and a power consumption calculation process for integrating the extracted power consumption and outputting it as the total power consumption in the home Program.

  A recording medium according to a twelfth aspect is a computer-readable recording medium in which the program according to the eleventh aspect is recorded.

  A power monitoring device according to a thirteenth aspect of the present invention receives the electric appliance operation detector according to any one of the second to seventh aspects and an operation signal transmitted from the electric appliance operation detector, and a plurality of electric appliances A power monitoring device that monitors the amount of power consumption, a database storing a correspondence table of the identification number, the name of the electric appliance and the amount of power consumption, and an identification signal detected from the received operation signal, and the detected identification A power consumption extraction unit that extracts the power consumption corresponding to the signal from the database, and a power consumption calculation unit that integrates the extracted power consumption and outputs the total power consumption in the home. And

As described above, according to the appliance operation detector of the present invention, in monitoring the power consumption of a plurality of appliances, an AC voltage corresponding to the AC current flowing through the power cable of each appliance is obtained by the current sensor. By setting the ratio of the current flowing in the power cable when the appliance is in operation and the AC voltage generated by this current to an AC voltage sufficient to operate the transmitter, There is no need to install a power source such as a battery or supply power from the outside, and it operates only when the electrical appliance is in operation. Therefore, it is possible to prevent excessive power from being consumed to detect.
Here, since the standby power of the electric appliance is small, the electromotive force of the current sensor is small and significantly different from the electromotive force in the operating state, so that the detection process can be easily performed.

In addition, according to the electrical appliance operation detector of the present invention, since it is used by being disposed on the power cable of the electrical appliance, there is no need for construction, and it can be easily used in each home.
Furthermore, according to the electrical appliance operation detector of the present invention, since the attachment mechanism for the power cable is provided, even if the electrical appliance is replaced, it is easy to replace the old electrical appliance with the power cable of the new electrical appliance. Can be done economically.

  In addition, according to the power monitoring system of the present invention, the operation signal transmitted when the installed appliance is in operation is received from the appliance operation detector, and is attached to the operation signal. Power consumption of all the appliances in the operating state in real time to extract the power consumption of the appliances in the operating state from the correspondence table between the identification signal and the power consumption of the appliances The quantity can be obtained.

Further, according to the power monitoring system of the present invention, as described above, the operation signal is received from the appliance operation detector arranged in the power cable of the appliance, and the identification number added to the operation signal is received. Since it is possible to calculate the power consumption of each electric appliance used in the home and the total power consumption of all the electric appliances in use, it is easy to calculate the data of the power consumption used for energy saving processing. It is possible to obtain time-series power consumption analysis.
Furthermore, according to the power monitoring system of the present invention, an alarm is output when the total power consumption exceeds a predetermined percentage of the maximum power consumption that can be consumed by each household contracted with the power company. It is possible to control the operating state of the appliance before the breaker falls.

Hereinafter, a power monitoring system for monitoring power consumption of a plurality of electrical appliances according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration example of a power monitoring system according to the embodiment.
In this figure, the electrical appliance operation detectors 1a, 1b, 1c, 1d each have a hole, and the power cable 2a of each electrical appliance used in the home in a state of passing through the power cable. , 2b, 2c, 2d, respectively.

Each power cable 2a, 2b, 2c, 2d is connected to an arbitrary outlet via plugs 3a, 3b, 3c, 3d, respectively.
Also, the appliance operation detectors 1a, 1b, 1c, and 1d detect the operating states of the video recorder 6, the television 7, the fluorescent lamp 8, and the dishwasher 9, which are respectively provided.
That is, the electrical appliance operation detectors 1a, 1b, 1c, and 1d detect an alternating current flowing through the power cable of each installed electrical appliance, and the installed electrical appliance is in a standby state or an operating state. When it is detected that it is in an operating state, an operating signal indicating the operating state is transmitted.

The receiving unit 5 transmits the received operating signal to the power monitoring device 4 when the antenna 5a receives the operating signal. The receiving unit 5 may be provided in the power monitoring device 4.
The power monitoring device 4 is a device that monitors the power consumption of a plurality of electrical appliances, and includes a power consumption extraction unit 10, a database 11, a power consumption calculation unit 12, and a power consumption monitoring unit 13.

As shown in FIG. 2, the database 11 includes an identification number of an electrical appliance operation detector, an electrical appliance name that is the name of the electrical appliance in which the electrical appliance operation detector is currently installed, and the electrical appliance name. Correspondence tables corresponding to a plurality of electrical appliances showing the correspondence with the amount of power consumed during operation are recorded.
Here, the name of the electric appliance corresponding to the identification number of the electric appliance operation detector and the power consumption of the electric appliance are set in the correspondence table in the database 11 by an input device (not shown) of the power monitoring device 4.

Next, a configuration example of the electrical appliance operation detector 1a (1b, 1c, 1d) will be described with reference to FIG.
The current sensor 14 is, for example, a toroidal coil, and generates an AC voltage proportional to an AC current flowing through the power cable by passing the power cable through a hole in the center of the sensor. As shown in FIG. 4, in the current sensor 14, the core 20 around which the coil 22 is wound is separated into two parts, a core 20a and a core 20b.

  The core 20a and the core 20b are connected via a hinge 51. When the stopper 50 is removed and the core 20b is pulled in the direction Q and the core 20a is pulled in the direction R, the core 220a and the core 20b with the hinge 51 as an axis. The power cable is inserted from the separated portion, and the core 20a and the core 20b are closed and fixed with the stopper 50, so that the power cable can be easily passed through the hole surrounded by the core 20. . The hinge 51 and the stopper 50 are provided as an attachment mechanism for the power cable.

Further, the toroidal coil may be clamped and clipped to the power cable (the structure is the same as the clamp type AC ammeter).
This current sensor 14 generates an AC voltage at a predetermined rate (a rate based on the current-voltage characteristic according to the characteristics of the toroidal coil) from the AC current flowing through the power cable 2a (2b, 2c, 2d) that passes therethrough. And supplied to the power feeding adjustment unit 15.

The power supply adjustment unit 15 rectifies the input AC voltage to obtain a DC voltage, and when this DC voltage reaches a preset voltage value for driving the transmitter 16, this DC voltage is converted into a drive voltage. If the DC voltage does not reach the set voltage value for driving the transmitter 16, the driving voltage is not supplied to the transmitter 16.
Here, in order to make it possible to deal with a plurality of electrical appliances with significantly different power consumptions, the current sensor 14 is provided with a changeover switch or the like, and the voltage adjustment of the AC voltage generated from the AC current is adjusted for each appliance (or power consumption Each time the amount is divided into a plurality of numerical regions), it may be switched by the changeover switch (for example, a tap is provided at a predetermined position of the coil of the toroidal coil, the taps are connected by the switch, and the coil It may be configured to bypass a predetermined distance).
That is, the ratio for converting the alternating current flowing through the power cable into the alternating voltage is adjusted according to the set value corresponding to the power consumption of each electrical appliance.

Further, instead of switching the conversion efficiency of the current sensor 14 with the changeover switch, the conversion efficiency (that is, the conversion ratio) of rectifying the AC voltage in the power supply adjustment unit 15 and converting it into the DC voltage by the changeover switch is changed to each electric appliance. Switching may be performed every time (or the power consumption is divided into a plurality of numerical areas).
When the driving voltage is supplied to the transmitter 16, the identification number assigned to each appliance operation detector stored inside is added, and the installed appliance operation detector is added. An operating signal indicating the operating state is transmitted via the antenna 16a.
Here, an IC tag having a short-distance wireless function may be used for the configurations of the power feeding adjustment unit 15 and the transmitter 16.
Further, the IC tag may be an active type with a built-in battery and have a transmission distance that can sufficiently cover the entire large house.

Next, with reference to FIG.1 and FIG.3, the operation example of the power monitoring system by the said embodiment is demonstrated.
a. Description of operation of electrical appliance operation detector 1b (1a, 1c, 1d) For example, the operation of the electrical appliance operation detector 1b disposed on the power cable 2a of the television 7 will be described. The appliance operation detectors 1a, 1c, and 1d disposed in the power cables 2a, 2c, and 2d of the other video recorder 6, the fluorescent lamp 8, and the dishwasher 9 perform the same operation.
When the plug 3b is connected to the outlet and the switch of the TV 7 is off, the cathode ray tube is not driven and the internal circuit is hardly operated, while the plug 3b is connected to the outlet. When the switch of the television 7 is on, the cathode ray tube is also driven and the internal circuit is operating.

When the switch of the television 7 is turned off, the power consumption is not large (for example, several hundreds mW) in a standby state, and almost no alternating current flows through the power cable 2b.
For this reason, the current sensor 14 generates an AC voltage corresponding to the AC current flowing through the power cable 2 b in the standby state, and supplies the AC voltage to the power feeding adjustment unit 15.
The power supply adjustment unit 15 rectifies the supplied AC voltage into a DC voltage, but does not supply a driving voltage to the transmitter 16 because the obtained DC voltage is lower than the set voltage value.

Next, when one of the family members turns on the TV 7, the TV 7 changes from the standby state to the active state, and the power consumption increases rapidly compared to the standby state (for example, 300 W). The alternating current flowing through the cable 2b increases.
Thereby, the current sensor 14 generates an alternating voltage corresponding to the alternating current flowing through the power cable 2 b in the standby state, and supplies the alternating voltage to the power supply adjusting unit 15.
The power supply adjustment unit 15 rectifies the supplied AC voltage into a DC voltage, and supplies the drive voltage to the transmitter 16 because the obtained DC voltage is higher than the set voltage value.

At this time, when the DC voltage obtained by rectifying the AC voltage is higher than the set voltage value, the power feeding adjustment unit 15 adjusts the voltage to the set voltage value and supplies the adjusted DC voltage to the transmitter 16 as the drive voltage. To do.
Then, the transmitter 16 starts operation with the supplied drive voltage, adds the identification number of the electrical appliance operation detector stored therein, and transmits an operation signal.

b. Description of the operation of the power monitoring device 4 The operation signal is sent from each electric appliance operation detector in which the receiving unit 5 is in operation, for example, the video recorder 6, the television 7, and the fluorescent lamp 8, at regular intervals (for example, 10 minutes, (Every 30 minutes, etc.) or when a measurement instruction is input, it is received and output to the power monitoring device 4.
Next, the power consumption amount extraction unit 10 extracts the identification signals A1000, A1001, and A1004 from the operation signals from the video recorder 6, the television 7, and the fluorescent lamp 8 input from the reception unit 5, respectively.
Then, the power consumption extraction unit 10 stores the power consumption (30 W, 300 W, 100 W) of the electric appliances (video recorder 6, television 7, fluorescent lamp 8) corresponding to the identification numbers A1000, A1001, A1004 in the database 11. Extract from each.

Next, the power consumption calculation unit 12 integrates the power consumption amounts (30 W, 300 W, 100 W) extracted from the database 11 by the power consumption amount extraction unit 10, and uses this integration result (430 W) as the total power consumption in the home. Output as a quantity.
The power consumption monitoring unit 13 compares the input total power consumption with a preset maximum power consumption (contracted power consumption contracted with an electric power company, for example, 10000 W), For example, 90% of the maximum power consumption is set as a power consumption setting value (9000 W), and if the total power consumption exceeds this power consumption setting value, an alarm is output and used. Call attention.

In addition, as already described, the power consumption monitoring unit 13 stores the total power consumption and the identification number of the electrical appliance in operation at that time in a time series for each predetermined period. , A function of generating a graph of the operating state of the appliance and the total power consumption in units of days, weeks, months and years.
Thereby, the user can visually check the operating state (that is, the usage state) of the electrical appliance, and can obtain a guideline for power saving in the home.

In addition, when only a small number of electrical appliance operation detectors are owned, for example, only one, it is possible to check the daily operating status of the electrical appliances as follows.
Change electrical appliances with electrical equipment operation detectors every few days, for example, every week, measure all electrical appliances in the home for multiple weeks, and measure all electrical data for each lap The total power consumption of the entire household can be obtained by overlaying the products for each day of the week and summing up again.

In addition, it is possible to centrally manage the operating status of electrical appliances, forgetting to turn off lights in each room, forgetting to turn off TVs, and forgetting to turn off all electrical appliances when going out. It is also possible to prevent the user from forgetting to operate the washing machine or the dishwasher.
Furthermore, by using an A / D converter that operates with low power consumption in the appliance operation detector, the data of this A / D converter is added to the operation signal along with the identification number and transmitted. It is also possible to obtain more detailed information on power consumption.
At this time, the name of the electric appliance corresponding to the identification number of the electric appliance operation detector and the amount of power consumption of the electric appliance are newly arranged in the correspondence table in the database 11 by an input device (not shown) of the power monitoring apparatus. Rewrite to the one of the electrical appliance.

  1 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed, thereby executing the power monitoring process. May be performed. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer system” includes a WWW system provided with a homepage providing environment (or display environment). The “computer-readable recording medium” refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, and a CD-ROM, and a storage device such as a hard disk built in the computer system. Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included.

  The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

It is a block diagram which shows the example of 1 structure of the electric power monitoring system by one Embodiment of this invention. The identification number of the electrical appliance operation detector recorded in the database 11 provided in the power monitoring apparatus 4 in FIG. 1, the electrical appliance in which this electrical appliance operation detector is disposed, and the operation time of this electrical appliance It is a corresponding | compatible table which shows a response | compatibility with the amount of power consumption. It is a block diagram which shows the example of 1 structure of the electric appliance operation | movement detector 1a (1b, 1c, 1d) of FIG. It is a conceptual diagram which shows one structural example of the current sensor 14 of FIG.

Explanation of symbols

1a, 1b, 1c, 1d ... Electrical appliance operation detectors 2a, 2b, 2c, 2d ... Power cables 3a, 3b, 3c, 3d ... Plugs 4 ... Power monitoring device 5 ... Receiver 6 ... Video recorder 5a ... Antenna 7 ... Television 8 ... Fluorescent lamp 9 ... Dishwasher 10 ... Power consumption extraction unit 11 ... Database 12 ... Power consumption calculation unit 13 ... Power consumption monitoring unit 14 ... Current sensor 15 ... Power feeding adjustment unit 16 ... Transmitter 16a ... Antenna 50 ... Stopper 51 ... Hinge

Claims (13)

A current sensor that has a hole, passes a power cable of an electrical appliance through the hole, and generates a voltage corresponding to a current flowing through the power cable;
An electrical appliance operation detector, comprising: a transmitter driven by the voltage and transmitting an operation signal indicating that it is in an operating state.   The appliance operation detector according to claim 1, wherein the transmitter transmits the operation signal by adding its own identification signal.   The electrical appliance operation detector according to claim 1, wherein the current sensor is a toroidal coil.   The electric appliance operation detection according to any one of claims 1 to 3, further comprising a power supply regulator that supplies the voltage to the transmitter when the voltage exceeds a predetermined voltage value. vessel.   The said current sensor adjusts the ratio which converts the electric current which flows into a power cable into a voltage based on the setting value according to the electric energy consumption of each electrical appliance, The any one of Claims 1-4 characterized by the above-mentioned. Electric appliance operation detector.   The appliance operation detector according to claim 4, wherein the power supply adjuster converts the voltage into a drive voltage based on a set value corresponding to a power consumption amount of each appliance.   The electrical appliance operation detector according to any one of claims 1 to 6, wherein the current sensor is constituted by a divided block and has a mounting mechanism for the power cable. The electric appliance operation detector according to any one of claims 2 to 7, and a power monitoring device that receives an operation signal transmitted from the electric appliance operation detector and monitors power consumption of a plurality of electric appliances A power monitoring system having
The power monitoring device is
A database in which a correspondence table of the identification number, the name of the electrical appliance, and the amount of power consumption is stored;
A power consumption extraction unit that detects an identification signal from the received operation signal and extracts a power consumption corresponding to the detected identification signal from the database;
A power monitoring system, comprising: a power consumption calculation unit that integrates the extracted power consumption and outputs the total power consumption.   When the total power consumption calculated by the power consumption calculation unit exceeds a predetermined percentage of the maximum power consumption that can be consumed by each household, a consumption monitoring unit that outputs an alarm is provided. The power monitoring system according to claim 8. A power monitoring method for receiving an operation signal transmitted from the appliance operation detector according to any one of claims 2 to 7 and monitoring power consumption of a plurality of appliances,
A data storage process for storing a correspondence table between the identification number, the name of the electrical appliance, and the amount of power consumption in a database;
A power consumption extraction process of detecting an identification signal from the received operation signal and extracting a power consumption corresponding to the detected identification signal from the database;
A power consumption calculation method comprising: integrating the extracted power consumption amounts and outputting the total power consumption amount in a home as a total power consumption amount. A program for receiving an operation signal transmitted from the electrical appliance operation detector according to any one of claims 2 to 7 and performing monitoring processing of power consumption of a plurality of electrical appliances,
A data storage process for storing a correspondence table of the identification number, the name of the electrical appliance and the amount of power consumption in a database;
A power consumption extraction process for detecting an identification signal from the received operation signal and extracting a power consumption corresponding to the detected identification signal from the database;
A computer-operable program comprising: a power consumption calculation process for integrating the extracted power consumption and outputting the total power consumption in a home.   The computer-readable recording medium which recorded the program of Claim 11. An electrical appliance operation detector according to any one of claims 2 to 7, and a power monitoring device that receives an operation signal transmitted from the electrical appliance operation detector and monitors power consumption of a plurality of electrical appliances. Yes,
A database in which a correspondence table of the identification number, the name of the electrical appliance, and the amount of power consumption is stored;
A power consumption extraction unit that detects an identification signal from the received operation signal and extracts a power consumption corresponding to the detected identification signal from the database;
A power monitoring apparatus comprising: a power consumption calculation unit that integrates the extracted power consumption and outputs the total power consumption in a home.

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