JP2014050226A - Power measurement device and power management system using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely and accurately grasp power consumption of an electric appliance.SOLUTION: A power measurement device comprises: a power reception plug removably inserted into a home receptacle; a feed socket into which a power supply connection plug of a household electrical appliance is removably inserted; a power measurement unit for measuring power consumption of a household electrical appliance whose power supply connection plug is inserted into the feed socket; a communication unit for transmitting information on the measured power consumption to an external communication apparatus through a communication network; and a display unit. The display unit shows that the communication unit is in a state capable of joining the communication network, while showing that power consumption of the household electrical appliance is abnormal.

Description

  The present invention relates to a power measuring device for measuring power consumption in an electric device and a power management system using the same.

  In recent years, from the viewpoint of environmental protection and energy problems, efforts have been made to raise awareness of energy saving (hereinafter also referred to as “energy saving”) of electrical equipment (mainly home appliances) used in the home. Energy saving is intended to reduce energy consumption by efficiently using energy or suppressing the consumption of excess energy. As a system for supporting such efforts, HEMS (Home Energy Management System) has been put into practical use. By using such HEMS, home power management and power control can be more easily performed.

  In order to realize energy saving, it is necessary to grasp the state of power consumption of electrical equipment. In this regard, there is known a power management system in which a power measurement device is provided for each branch breaker to measure power, and the result is grouped to display a list of power usage (for example, refer to Patent Document 1). .

JP 2011-120428 A

However, in such a conventional power management system, power is measured for each branch breaker, and data is acquired and displayed according to the installation status of the branch breaker. Therefore, power consumption data for each electrical device is acquired. Thus, it is impossible to display information regarding the power consumption state useful for the user.
Furthermore, even if the power consumption of each electric device exceeds the rated value or the power consumption information of each electric device is displayed incorrectly, there is a problem in that it cannot be promptly notified to the user.

  The present invention has been made in consideration of such circumstances, and the electrical equipment can be used safely without exceeding the rated power, and information on the power consumption of the electrical equipment can be correctly transmitted to the external communication equipment. A power meter and a power management system are provided.

  The present invention relates to a power receiving plug that is removably inserted into an in-home outlet, a power supply socket into which a power connection plug of the home appliance is removably inserted, and consumption of the home appliance in which the power connection plug is inserted into the power supply socket. A power measurement unit that measures power, a communication unit that transmits information about the measured power consumption to an external communication device via a communication network, and a display unit, the display unit being able to participate in the communication network And a power meter that displays an abnormal state of power consumption of the home appliance.

  According to the present invention, when the power consumed by the home appliance exceeds a predetermined value, and the measured power is satisfied with the external communication device, the display unit for displaying that it is possible to participate in the communication network. Since it is used even when it is not transmitted, the user can quickly know the situation and can use the home appliance safely.

1 is a system diagram showing an overall configuration of a power management system according to an embodiment of the present invention. It is a block diagram which shows the structure of the home controller by embodiment of this invention. It is an external view of the electric power measuring device by embodiment of this invention. It is a block diagram which shows the structure of the electric power measuring device by embodiment of this invention. It is explanatory drawing which shows the example of a display of the home controller by embodiment of this invention. It is a flowchart which shows the principal part operation | movement of the electric power measuring device by embodiment of this invention. It is a flowchart which shows the pairing setting operation | movement of the electric power measuring device by embodiment of this invention.

  The power measuring device according to the present invention includes a power receiving plug that is removably inserted into a power outlet, a power supply socket that is removably inserted into a power supply plug of the home appliance, and a power connection plug that is inserted into the power supply socket. A power measuring unit that measures power consumption of home appliances, a communication unit that transmits information about the measured power consumption to an external communication device through a communication network, and a display unit, wherein the communication unit communicates with the display unit A power meter is provided that displays that the network device can participate in the network and displays an abnormal state of power consumption of the home appliance.

The power measuring unit detects the current flowing from the power receiving plug to the power supply socket, the current I detected from the current detecting unit, and the voltage E received from the power receiving plug based on the power consumption of the home appliance. You may provide the electric power calculating part to calculate.
The power calculation unit calculates a phase difference θ between the current I detected by the current detection unit and the voltage E received from the power receiving plug, and the effective values of the current I and the voltage E are Ie and Ee, respectively. In this case, it is preferable to calculate the power consumption by P = Ie · Ee · cos θ.
The display unit may include a light emitting element.
From another viewpoint, the present invention provides an acquisition unit that acquires information about power consumption from each of a plurality of electrical devices, a display, and a control unit that processes the information acquired via the acquisition unit and displays the information on the display And the acquisition unit provides a power management system including the power measuring device.

The present invention will be described below with reference to embodiments shown in the drawings. This does not limit the invention.
<Configuration of power management system>
The power management system according to this embodiment manages power information related to power consumption in at least one electrical device.

  The power information here includes various information related to power consumption in the corresponding electric device (electric appliance).

  Hereinafter, a power management system including a plurality of electric devices used in a house will be described as an example, but the present invention is not limited to such a power management system.

  In this specification, the electric device includes both a device that operates with electric power supplied from the outside and a device that generates electric power with some energy. Houses include houses and offices.

FIG. 1 is a system diagram showing an overall configuration of a power management system 1 according to an embodiment of the present invention.
The power management system 1 according to this embodiment is installed in a house such as a house or an office. More specifically, the power management system 1 includes a plurality of home appliances as electric devices that consume power.

  FIG. 1 illustrates an air conditioner (air conditioner) 200A, a television 200B, a microwave oven 200C, a refrigerator 200D, and a lighting fixture 200E installed in a house as home appliances. The power management system 1 also includes a solar power generation device 200X as an electrical device that generates power, and a storage battery 200Y that stores and discharges power. The storage battery 200Y may be installed in a house or the like, or a storage battery for an automobile may be used as a storage battery for a house.

  Furthermore, the power management system 1 includes a photovoltaic power generation apparatus 200X, a storage battery 200Y, a power system (such as a commercial power source provided by an electric power company), and a distribution board 300, which are connected to a power condition for controlling each power. With 200Z. The power conditioner 200Z is connected via the distribution board 300 after balancing the generated power from the photovoltaic power generation apparatus 200X, the charge / discharge power for the storage battery 200Y, and the purchased power from the power system from the viewpoint of efficiency. Electric power is supplied to the electric devices 200A to 200E through the power line 402.

  Furthermore, the power management system 1 is a power management device for monitoring and controlling the measuring device 400, the solar power generation device 200X, the storage battery 200Y, the power conditioner 200Z, and the like associated with each of the electric devices 200A to 200E. A controller 100 is provided.

  The home controller 100 can perform data communication with the measuring instrument 400 associated with each of the electric devices 200A to 200E, the power conditioner 200Z, and the like via the wireless network 401.

  Any wireless network 401 can be used. For example, a wireless local area network (LAN), ZigBee (registered trademark), Bluetooth (registered trademark), infrared communication system conforming to the IEEE 802.11 standard can be used. Etc. can be used.

  Measuring instrument 400 is associated with electric devices 200 </ b> A to 200 </ b> E, measures information related to power consumption in the associated electric devices 200 </ b> A to 200 </ b> E, and transmits the measurement information to home controller 100. Typically, as measuring instrument 400, a power measuring instrument that is disposed between power line 402 and plugs 250A to 250E of electric devices 200A to 200E and measures the state of power consumption is used.

  In the example shown in FIG. 1, five measuring devices 400 are electrically connected to the power line 402. Each measuring device 400 is connected with a plug 250A of an air conditioner 200A, a plug 250B of a television 200B, a plug 250C of a microwave oven 200C, a plug 250C of a refrigerator 200D, and a plug 250E of a lighting device 200E. .

  Therefore, the five measuring devices 400 measure information regarding power consumption in the air conditioner 200A, the television 200B, the microwave oven 200C, the refrigerator 200D, and the lighting fixture 200E, respectively.

  The home controller 100 provides a user interface that presents to the user the state of power consumption / generation in the power management system 1 and accepts instructions regarding power management in the power management system 1 from the user.

  The home controller 100 can also display a graph related to power consumption based on information related to power consumption stored in the hard disk 109 (FIG. 2). Home controller 100 may be a portable type, may be detachable from a base arranged on a table, or may be fixed to a wall of a room.

<Home controller 100>
Next, the configuration of the home controller 100 that is the power management apparatus of the power management system 1 shown in FIG. 1 will be described.
FIG. 2 is a block diagram showing the configuration of the home controller 100 according to the embodiment of the present invention.

  As shown in FIG. 2, the home controller 100 includes a CPU (Central Processing Unit) 101 as a processor, a touch panel 102 including a display 103 and a tablet 104, operation buttons 105, a communication interface 106, an output interface 107, An input interface 108, a hard disk 109, a memory 110, a speaker 111, and a clock 112 are provided.

  The CPU 101 is a control unit that performs overall processing in the home controller 100, and provides various functions described below by executing a program stored in advance in the memory 110 or the like.

  The CPU 101 executes processing instructed by a user operation input from the tablet 104 or the operation button 105. Such an instruction includes an instruction related to the change of the control mode for the power conditioner 200Z, an instruction to display the current or past power management state, and the like.

  The touch panel 102 is a device that provides a user interface, presents various types of information to the user in accordance with instructions from the CPU 101, and outputs instructions input from the user to the CPU 101. More specifically, the display 103 includes, for example, an LCD (Liquid Crystal Display) or an organic EL (Electro Luminescence) display, and displays an image on its display surface.

  The tablet 104 detects a touch operation with a user's finger or the like, and outputs a coordinate value indicating a position where the touch operation is performed to the CPU 101. In this embodiment, a tablet 104 is provided in association with the display surface of the display 103.

  The operation buttons 105 are input means for accepting user operations, and one or more operation buttons 105 are arranged on the surface of the home controller 100. The operation button 105 includes a plurality of buttons and keys such as a determination button, a return button, a direction button, and a numeric keypad. When the operation button 105 receives a user operation, the operation button 105 outputs information indicating the user operation to the CPU 101.

  The communication interface 106 performs data communication with the measuring device 400, the solar power generation device 200X, the storage battery 200Y, the power conditioner 200Z, and the like according to a command from the CPU 101. More specifically, the communication interface 106 uses a wireless local area network (LAN), ZigBee (registered trademark), Bluetooth (registered trademark), an infrared communication method, or the like that conforms to the IEEE 802.11 standard as described above. .

  The output interface 107 mediates exchange of internal commands between the CPU 101 and the display 103, and the input interface 108 mediates exchange of internal commands between the tablet 104 and / or the operation buttons 105 and the CPU 101.

  The hard disk 109 stores various data 150 necessary for information processing in the home controller 100.

  The memory 110 is realized by a RAM (Random Access Memory) that is a volatile storage device, a ROM (Read-Only Memory) that is a nonvolatile storage device, and the like. Store the necessary work data.

  The speaker 111 is an audio device, and outputs audio according to a command from the CPU 101. The clock 112 is a time measuring means and responds to the CPU 101 with the current date and time according to a command from the CPU 101.

  Note that the hard disk 109 and the memory 110 may be realized using a storage medium connected via a communication interface. As such storage media, semiconductor memories such as flash memory, mask ROM, EPROM (Electronically Programmable Read-Only Memory), EEPROM (Electronically Erasable Programmable Read-Only Memory), IC (Integrated Circuit) card, CD-ROM (Compact Disk-Read Only Memory) and optical disk storage media such as DVD-ROM (Digital Versatile Disk-Read Only Memory), magneto-optical disk storage media such as MO (Magnetic Optical Disc) and MD (Mini Disc), FD ( Magnetic storage media such as Flexible Disk), magnetic tape, and cassette tape can be used.

  Information processing in the home controller 100 is realized by the CPU 101 executing a program in cooperation with peripheral hardware components. Generally, such a program is installed in advance in the memory 110 or the like.

  Such a program can be provided by being stored and distributed in an arbitrary storage medium. Alternatively, such a program can be provided by downloading from a server device (or other device) connected to the Internet or the like.

  The program stored in the storage medium is read out, or the program is acquired by downloading from the server device, and is temporarily stored in the memory 110 or the like. The CPU 101 expands the program stored in the memory 110 into an executable format and then executes the program.

  Storage media for storing such programs include semiconductor memory media such as flash memory, mask ROM, EPROM, EEPROM, and IC card, optical disk storage media such as CD-ROM and DVD-ROM, and optical media such as MO and MD. Magnetic storage media such as magnetic disk storage media, FD, magnetic tape, cassette tape, etc. can be used.

  Furthermore, instead of installing the program in advance in the memory 110 or the like, the CPU 101 may read and execute a program stored in another system or apparatus.

  Furthermore, after a program read from a storage medium or the like is written to a memory or the like mounted on a function expansion board or function expansion unit mounted on the computer, it is stored in the function expansion board or function expansion unit according to the program. The functions according to this embodiment may be realized by performing all or part of the necessary processing by a mounted arithmetic unit (CPU or the like).

  Furthermore, the CPU 101 executes not only all the functions according to this embodiment by executing a program, but also all or part of processing required by an OS (operating system) executed on the computer according to the program. By performing this, the functions according to this embodiment may be realized.

  When the functions according to this embodiment are realized by software as described above, the program itself read from the storage medium or the like, or the storage medium storing the program constitutes one aspect of the present invention. .

  In this specification, the program includes not only a program that can be directly executed by the CPU 101 but also a program in a source program format, a compressed program, and an encrypted program.

<Measurement device 400>
FIG. 3 is an external view of a measuring instrument 400 according to the embodiment of the present invention. Here, FIG. 3A shows a perspective view including the power supply socket 4001 of the measuring instrument 400, FIG. 3B shows a side view of the measuring instrument 400, and FIG. A perspective view including a power receiving plug 4002 of the measuring device 400 is shown.

  Measuring instrument 400 as a measurement unit that acquires information on power consumption from electric devices 200A to 200E includes a socket for supplying power flowing through power line 402 (FIG. 1) and plugs 250A to 250E of electric devices 200A to 200E. It arrange | positions so that it may be inserted between.

  More specifically, as shown in FIG. 3A, a power supply socket 4001 for plug insertion is provided on the surface 4051 of the measuring device 400. On the other hand, as shown in FIGS. 3B and 3C, a power receiving plug 4002 is provided on a surface 4053 which is a surface opposite to the surface 4051 of the measuring device 400.

  Plugs 250A to 250E of electric devices 200A to 200E are inserted into power supply socket 4001, and power receiving plug 4002 is inserted into a socket (outlet / outlet) for supplying power via power line 402 provided in the house. It is.

  Since the measuring device 400 is preferably as thin as possible, the thickness of the side surface 4052 is designed to be as small as possible.

  A display unit 4041 and a setting button 4042 are further provided on the surface 4051 of the measuring device 400. The display unit 4041 includes red and blue LEDs.

More specifically, the display unit 4041 emits light by changing the presence / absence of lighting, presence / absence / period of blinking, emission color, and the like so as to correspond to the display contents. The setting button 4042 is an input means for accepting a user operation. When the setting button 4042 is operated by the user, an initial setting in the measuring instrument 400 is started.
Note that the display unit 4041 may include only a single color (for example, red) LED, and display contents may be represented by the presence or absence of lighting or the frequency of blinking.

FIG. 4 is a block diagram showing the configuration of the measuring instrument 400 according to the embodiment of the present invention.
As shown in FIG. 4, measuring instrument 400 includes a pair of main wirings that electrically connect power supply socket 4001 and power reception plug 4002 in addition to power supply socket 4001, power reception plug 4002, light emitting unit 4041, and setting button 4042. 4004 and 4005, a shunt resistor 4003 inserted in the main wiring 4005, a power supply unit 4007, a power measurement unit 4010, a communication unit 4020, and an antenna 4030.

  The power measurement unit 4010 detects power flowing from the power receiving plug 4002 to the power supply socket 401. More specifically, the power measurement unit 4010 includes a voltage input ADC (Analog to Digital Converter) 4011, a current input ADC 4012, a power calculation unit 4013, and a digital / frequency conversion unit 4014. .

  Voltage input ADC 4011 is connected to main wirings 4004 and 4005 via wirings V1P and V1N, respectively. The voltage input ADC 4011 outputs a digital signal indicating a voltage (potential difference) generated between the main wirings to the power calculation unit 4013.

  The current input ADC 4012 is electrically connected to both ends of the shunt resistor 4003 inserted in the main wiring 4005 via the wirings V2P and V2N. The shunt resistor 4003 is a minute (hundreds of micron) resistor used for measuring a flowing current value. The current input ADC 4012 outputs a digital signal indicating the current value of the current flowing through the shunt resistor 4003 to the power calculation unit 4013.

The power calculation unit 4013 calculates the phase difference θ between the digital signal (voltage E) obtained from the voltage input ADC 4011 and the digital signal (current I) obtained from the current input ADC 4012, and the effective value of the voltage E and current I Is Ee, Ie, and the power factor is cosθ
P = Ie ・ Ee ・ cosθ ・ ・ ・ （１）
Is calculated. Then, a digital signal indicating the value P (effective power / unit: W or kW) obtained as a result is output to the digital / frequency conversion unit 4014 as a power value.

  The digital / frequency conversion unit 4014 converts the digital signal from the power calculation unit 4013 into a frequency signal and outputs the frequency signal obtained as a result to the communication unit 4020.

  The power supply unit 4007 supplies power to each component of the measuring device 400. The power supply unit 4007 is connected to the main wirings 4004 and 4005 and uses part of the power flowing from the power receiving plug 4002 to the power supply socket 4001 as driving power for the measuring device 400. The power supply unit 4007 converts AC power into DC power, and then supplies the DC power to the power measurement unit 4010 and the communication unit 4020.

  The communication unit 4020 transmits a radio signal indicating the power consumption P in the electric device connected to the power supply socket 4001 calculated by the power measurement unit 4010 via the antenna 4030.

  More specifically, the communication unit 4020 includes a CPU 4021, a ROM 4022, a RAM 4023, a GPIO (General Purpose Input / Output) 4024, and a wireless RF (Radio Frequency) unit 4025.

  The GPIO 4024 receives a frequency signal representing the power consumption P input from the digital / frequency conversion unit 4014 and outputs information on the frequency signal to the CPU 4021.

The CPU 4021 converts the frequency signal representing the power consumption P from the GPIO 4024 according to a predetermined logic, and outputs the result to the wireless RF unit 4025. The wireless RF unit 4025 generates a wireless signal by modulating a carrier wave based on a data conversion result from the CPU 4021. A wireless signal generated by the wireless RF unit 4025 is transmitted via the antenna 4030.
Further, the CPU 4021 compares the power consumption P obtained from the GPIO 4024 with a preset value Ps, and activates the display unit 4041 when P> Ps.

  The CPU 4021 implements the processing as described above by executing a program stored in the ROM 4022 in advance. The RAM 4023 stores work data necessary for the CPU 4021 to execute the program.

<Measurement information>
The measuring device 400 measures the power consumption P (unit: W or kW) consumed by the connected electrical device as described above. By integrating the power consumption P over a predetermined time, the power consumption amount (unit: Wh or kWh) of the electric device is calculated.

  The home controller 100 can display both the power consumption and the power consumption of each electric device. Further, a plurality of electric devices are grouped, and the power consumption and power consumption for the entire group are displayed.

  Therefore, as an example of the measurement information about the corresponding electric devices 200A to 200E transmitted from the measuring device 400, for example, it is as follows (however, it is not limited to the following example).

  (1) Each measuring device 400 measures the power consumption in the electric devices 200A to 200E every predetermined cycle (for example, every second), and the measured power consumption is measured information as the measurement information in the same transmission cycle as the measurement cycle. Send.

  (2) Each measuring device 400 measures the power consumption in the electric devices 200A to 200E every predetermined cycle (for example, every second), and the transmission cycle is longer than the measurement cycle, from the previous transmission to the current transmission. A plurality of power consumptions measured in the meantime are transmitted as measurement information.

  (3) Each measuring device 400 measures the power consumption in the electric devices 200A to 200E at every predetermined period (for example, every second), and the transmission period is longer than the measurement period, from the previous transmission to the current transmission. Average power consumption obtained by averaging a plurality of power consumptions measured in the meantime is transmitted as measurement information.

  (4) In (2) or (3), transmission is performed after adding to the measurement information a power consumption amount obtained by integrating a plurality of power consumptions measured from the previous transmission to the current transmission. In some cases, an average value, minimum value, maximum value, etc. of a plurality of power consumption are added.

  Although time information acquired by the measuring device 400 by some means may be added to the measurement information, generally, when the home controller 100 receives the measurement information, the time at that time is acquired from the clock 112, The data is stored in the hard disk 109 in association with the received measurement information.

  An arbitrary protocol can be adopted for exchanging measurement information between the home controller 100 and the measuring device 400. Typically, a configuration is adopted in which the measuring device 400 broadcasts a packet including its own measurement result, and the home controller 100 receives this packet.

  FIG. 5 is an explanatory diagram showing an example of a home appliance monitor screen displayed on the display 103 (FIG. 2) of the home controller 100 according to the embodiment of the present invention.

<Operation of measuring instrument>
FIG. 6 is a flowchart showing a main part of the operation of the measuring instrument 400.
First, the power receiving plug 4002 of the measuring device 400 shown in FIG. 3 is inserted into the in-home outlet.
Accordingly, as shown in FIG. 6, in step S <b> 0, “pairing setting” processing for causing the measuring device 400 to participate in the network 401 (FIG. 1) is performed. The “pairing setting” process will be described later with reference to FIG.

  Next, the plug of the electric device is inserted into the power supply socket 4001. The received voltage from the power receiving plug 4002 is detected by the voltage input ADC 4011 (step S1).

  Next, the current flowing from the power receiving plug 4002 to the power supply socket 4001 is measured by the voltage across the shunt resistor 4003 and input to the current input ADC 4012 via the wirings V2P and V2N (step S2).

  Then, the power calculation unit 4013 calculates the power consumption P from Equation (1) in consideration of the power factor from the digital signals from the voltage input ADC 4011 and the current input ADC 4012 (step S3).

  Next, when the power consumption P calculated in step S3 is equal to or less than the predetermined value Ps (step S4), the LED of the display unit 4041 is not lit (step S5), and the power consumption P calculated in step S3 is Measurement information is transmitted to the home controller 100 via the communication unit 4020 (step S6).

  When home controller 100 receives the measurement information, home controller 100 returns a reception signal to measuring instrument 400. When the measuring device 400 receives the reception signal (step S7), the LED of the display unit 4041 is not turned on (step S8), and t seconds, for example, 1 second elapses after the transmission operation in step S6 ends (step S9). The routine returns to step S1, and detection of voltage and current and calculation of power consumption are started again (steps S1, S2, S3).

  Here, in step S4, when P> Ps, the red LED of the display unit 4041 is turned on (step S10), and the user is informed that the power consumption P has exceeded the predetermined value Ps. Here, the predetermined value Ps corresponds to the rated power consumption of the electrical equipment connected to the measuring device 400. That is, as the measuring instrument 400, for example, those for 1.5 kW, 1.0 kW, and 0.5 kW are prepared, and are selected according to the rated power consumption (power capacity) of the connected electrical device.

  If the reception signal from the home controller 100 cannot be received in step S7, the blue LED of the display unit 4041 is turned on (step S11), and the power consumption measured by the measuring device 400 is transmitted to the home controller 100 satisfactorily. In this case, the user is notified that an error occurs in the display of the home controller 100.

FIG. 7 is a flowchart showing the “pairing setting” process in step S0 of FIG.
As shown in FIG. 7, when power is supplied from the power supply unit 4007 to the communication unit 4020 (step S21), the communication unit 4020 starts searching for the transmission destination, that is, the home controller 100 via the network 401 (step S22). ). Accordingly, both red and blue LEDs (hereinafter simply referred to as LEDs) on the display unit 4041 start to blink at an interval of 500 mS at the same time (step S23). When a state in which participation in the network is not permitted, that is, a state in which the transmission destination is not found has passed for 60 seconds or longer (steps S24 and S25), the hold state is entered (step S26), and the LED blinks at an interval of 250 mS (step S27). . Therefore, if the setting button 4042 is pressed for a short time (less than 5 seconds), the routine returns to step S22 and the pairing setting process is resumed.

In addition, when it is determined in step S24 that participation in the network is permitted, that is, when a transmission destination is found, the fact that it has joined the communication network is notified by turning on the LED for 2 seconds (steps S29 and S30). At this point, pairing is complete.
The user needs to perform an operation for setting the home controller 100 to be allowed to participate in the network while the LED of the measuring device 400 is lit at an interval of 500 ms, and the LED of the measuring device blinks. Has a role of notifying the time when the user performs this operation.
Further, since there are a plurality of devices that want to perform power measurement in a general home, there are a plurality of measuring devices 400. When the setting button 4042 is briefly pressed (steps S31 and S32) in order to make it easy to understand which device is associated with which measuring device 400 (steps S31 and S32), the LED is turned on for 250 mS and displayed on the home controller 100. It helps to determine which device is connected to the measuring instrument. Further, since the LED blinks at this time, the user can confirm that the target measuring device has been paired and is participating in the network (steps S33 and S34). If the setting button 4042 is pressed long (for 5 seconds or longer) (step S35), the routine returns to S22 and the pairing setting process is resumed.
In this way, the electric device is used safely and the power consumption is correctly transmitted to the user.

1 Power Management System 100 Home Controller 101, 4021 CPU
102 Touch Panel 103 Display 104 Tablet 105 Operation Button 106 Communication Interface 107 Output Interface 108 Input Interface 109 Hard Disk 110 Memory 111 Speaker 112 Clock 200A-200E Electric Device

Claims (5)

  Measures the power consumption of a power receiving plug that is removably inserted into a power outlet, a power supply socket in which the power supply plug of the home appliance is removably inserted, and a home appliance in which the power connection plug is inserted into the power supply socket. A power measurement unit; a communication unit that transmits information about the measured power consumption to an external communication device through a communication network; and a display unit, wherein the display unit is in a state in which the communication unit can participate in the communication network. And a power measuring device for displaying an abnormal state of power consumption of the home appliance.   The power measuring unit detects the current flowing from the power receiving plug to the power supply socket, the current I detected from the current detecting unit, and the voltage E received from the power receiving plug based on the power consumption of the home appliance. The power measuring device according to claim 1, further comprising a power calculation unit for calculating.   The power calculation unit calculates a phase difference θ between the current I detected by the current detection unit and the voltage E received from the power receiving plug, and the effective values of the current I and the voltage E are Ie and Ee, respectively. The power measuring device according to claim 2, wherein the power consumption is calculated by P = Ie · Ee · cos θ.   The power measuring device according to claim 1, wherein the display unit includes a light emitting element.   An acquisition unit that acquires information on power consumption from each of a plurality of electrical devices; a display; and a control unit that processes the information acquired via the acquisition unit and displays the information on the display. The power management system which consists of a power measuring device as described in any one of Claims 1-4.