JP2011002365A - Electric power monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric power monitoring system raising the awareness of a user about power saving.SOLUTION: On the basis of a measurement value stored in a storage part 13 of an electric power measurement unit 1 and the measurement time of the measurement value, a master unit 2 calculates the electricity price for integral power consumption during a prescribed period by a master unit arithmetic part 21, and displays the electricity price calculated by the master unit arithmetic part 21 on a display 25. Accordingly, in contrast to the case in which the power consumption measured by the electric power measurement unit 1 is displayed, the awareness of the user about power saving is raised. Further, because the measurement value of the power consumption is associated with the measurement time, the electricity price is more precisely calculated even when the electricity price is different dependent on the time period.

Description

  The present invention relates to a power monitoring system that monitors power consumed in a house.

  Conventionally, a power measurement unit that measures the amount of power supplied from the power system to the main breaker of a residential distribution board (housing panel), and a display that displays the integrated or instantaneous value of the amount of power measured by the power measurement unit Various types of power monitoring systems including units are provided (see, for example, Patent Document 1). In Patent Document 1, a housing information panel (or interphone master) installed in a house is also used as a display unit.

JP-A-11-225438

  The conventional power monitoring system warns the user (resident) about power saving when the amount of power measured by the power measuring unit exceeds a preset target value. It was difficult to improve.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a power monitoring system capable of improving the user's awareness of power saving.

  In order to achieve the above object, the invention of claim 1 includes a power measurement unit that measures the amount of power supplied from the power system, and a display unit that displays the amount of power measured by the power measurement unit. The measurement unit includes clock means for measuring time, and storage means for storing the measurement value of the electric energy in association with the measured time, and the display unit is a measurement stored in the storage means of the power measurement unit. A calculation means for calculating an electricity charge for an integrated power amount within a predetermined period based on the value and a measurement time of the measurement value, and a display means for displaying the electricity charge calculated by the calculation means. To do.

  According to the first aspect of the present invention, since the amount of electric power is displayed by replacing it with an electricity bill, the user's consciousness about power saving can be improved as compared with the case where the amount of electric power measured by the electric power measurement unit is displayed. And since the measured value of electric energy is matched with measurement time, for example, even when an electricity bill changes with time zones, an electricity bill can be calculated more correctly.

  According to a second aspect of the present invention, in the first aspect of the invention, the power measurement unit stores in the storage means an integrated value obtained by integrating the measurement value of the electric energy in units of one hour. When calculating the electricity bill for a day, the integrated value for 24 hours memorize | stored in the memory | storage means of an electric power measurement unit is received collectively.

  According to the second aspect of the present invention, the amount of data can be reduced compared with the case where the calculation means of the display unit receives the measurement value for 24 hours from the power measurement unit, and the time until the electric charge is calculated and displayed. Can be shortened, improving usability.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the display unit is provided integrally with an interphone master unit that is installed in a house and forms an interphone system together with a doorphone unit outside the house. And

  According to invention of Claim 3, the installation space of a display unit becomes unnecessary and can attain space saving.

  According to the present invention, it is possible to improve the user's awareness of power saving.

It is a block diagram which shows embodiment of this invention. It is a system configuration diagram including the same as above. It is a flowchart for demonstrating operation | movement of the electric power measurement unit same as the above.

  As shown in FIG. 2, the power monitoring system of the present embodiment includes a power measurement unit 1 that measures the amount of power supplied from the power system, and an interphone parent that is a display unit that displays the amount of power measured by the power measurement unit 1. Machine 2.

  A single-phase three-wire power line Lp drawn from the power system to the housing board 200 is connected to the primary side of the main breaker MB, and via a branch breaker (not shown) connected to the secondary side of the main breaker MB. Then, electric power is supplied to the load L. A current sensor unit 3 is provided on the primary side of the main breaker MB.

  As shown in FIG. 1, the power measuring unit 1 includes a current value detected by a pair of current transformers CT1 and CT2, a line voltage between the voltage line L1 and the neutral line N, and a voltage line L2. And a calculation unit 10 that calculates instantaneous power and integrated electric energy from the voltage value obtained by detecting the line voltage of the neutral line N, a control unit 11 having a CPU as a main component, a timer 12 as a clock means, a semiconductor A communication unit 14 that performs bidirectional data communication between a storage unit 13 that includes a memory and an interphone parent device (hereinafter referred to as a parent device) 2 that is a display unit, and voltage lines L1, L2, and neutral wires A power supply circuit 15 for generating an operating power supply for each unit from a line voltage between N and a battery 16 for supplying backup power for the timer 12 and the storage unit 13 are provided.

  The calculation process of the calculation unit 10 will be described with reference to the flowchart of FIG. The calculation unit 10 samples the current value detected by the current sensor unit 3 and the voltage value of the line voltage at a predetermined sampling period and quantizes them to calculate the instantaneous power, and also calculates the instantaneous power sufficiently longer than the sampling period (for example, From the average value of instantaneous power in 1 minute), the integrated electric energy in the specified period is calculated (step S1). Further, the calculation unit 10 calculates an integrated power amount (hour integrated power amount) for one hour from the integrated power amount in the specified period (step S2), and one hour has elapsed since the previous calculation of the time integrated power amount. For example, the process returns to step S1 and repeats the calculation of the integrated power amount. If one hour has elapsed, the current time integrated power amount is output to the control unit 11 (steps S3 and S4). The quantity value is initialized to zero, and the process returns to step S1.

  The control unit 11 stores in the storage unit 13 the data of the time integrated power amount received every hour from the calculation unit 10 in association with the measurement time (for example, 1 hour from 12:00 to 13:00 on a month × day). Let Note that past data (for example, data that has passed several months from the measurement time) is sequentially deleted (overwritten) according to the capacity of the storage unit 13.

  As shown in FIG. 2, the base unit 2 includes a doorphone slave unit 100 installed outside the home (for example, an outside entrance), a camera unit with a sensor 110 installed outside the home, and a plurality of houses installed in the home. This constitutes a so-called security intercom system together with a fire alarm device (residential alarm device) 120 and the like. The security intercom system is an intercom system equipped with not only an intercom call between the house and outside the house, but also a crime prevention function for preventing intrusion of a suspicious person and a disaster prevention function for notifying the occurrence of a fire.

  The master unit 2 includes a master unit control unit 20 having a CPU as a main component as shown in FIG. 1 and a master unit calculation unit that calculates an electric charge from an integrated power amount measured by the power measurement unit 1 as will be described later. 21 and a communication unit 22 that performs bidirectional data communication with the communication unit 14 of the power measurement unit 1 via the communication line Ls, a timer 23 that measures time, and a storage unit 24 that includes a semiconductor memory, An audio signal or a video signal between the display unit 25 including a liquid crystal display, the operation input receiving unit 26 having a touch panel, an operation switch, and the like and receiving a user's operation input, and the doorphone slave unit 100 through a signal line. A door phone sub-unit interface (I / F) unit 27 for transmitting / receiving a call signal and the like, and a camera sub-unit interface with a sensor for receiving a video signal transmitted from the camera sub unit 110 with a sensor via a signal line. An ace (I / F) unit 28, a residential alarm interface (I / F) unit 29 that receives a fire detection signal from the residential alarm 120 via a signal line, and a power supply circuit 30 that creates an operating power supply for each unit It has.

  In base unit control unit 20, when a call signal is received from door phone sub unit 100 through door phone sub unit I / F unit 27, an operation input receiving unit 26 that rings a ringing tone from a speaker (not shown) and receives an operation input of a response to the call. When the operation signal is received, a communication path is formed between the door phone slave I / F unit 27, a microphone (not shown), and a speaker to transmit a voice signal bidirectionally, and the door phone slave 100 is provided. An image captured by an imaging device (not shown) is received through the doorphone slave I / F unit 27 and displayed on the display 25. The base unit control unit 20 receives a video signal transmitted from the sensor-equipped camera slave unit I / F unit 28 while receiving a video signal transmitted from the sensor-equipped camera slave unit 110 that has detected that a person has entered the monitoring area. This is displayed on the display 25. Further, when receiving the fire detection signal transmitted from the home alarm device 120 that has detected the fire through the home alarm device I / F unit 29, the base unit control unit 20 sounds an alarm sound from the speaker and fires the display unit 25. Displays a message that reports the occurrence. The basic functions of the base unit 2 of the security intercom system as described above are well known in the art and will not be described in detail.

  Next, the function of the master unit 2 as a display unit will be described. When the operation input receiving unit 26 of the base unit 2 receives an operation input for inquiring about an electricity charge on an arbitrary day (for example, yesterday), the base unit control unit 20 that has received the operation signal from the operation input receiving unit 26 20, the communication unit 22 sends a command for inquiring the time-integrated power amount for one day to the power measurement unit 1 from yesterday. The control unit 11 of the power measurement unit 1 that has received the command through the communication unit 14 has one day (24) of the day (yesterday) specified by the command from the time accumulated power amount data stored in the storage unit 13. The time integrated power consumption data is read out and the read time integrated power consumption data is transmitted collectively from the communication unit 14.

  In the base unit 2, the base unit calculation unit 21 calculates yesterday's electricity bill based on yesterday's time-integrated power amount data received by the communication unit 22. Here, the electricity bill setting data necessary for calculating the electricity bill is stored in the storage unit 24 of the parent device 2 in advance. For example, if the electricity rate is set for an all-electric home, the night time zone from 23:00 to 7pm is 5 yen / kWh, and the morning / night time zone from 7am to 10am and from 17:00 to 23:00 is 7 yen / kWh. The daytime hours from 17:00 to 17:00 are 10 yen / kWh. Accordingly, the base unit calculation unit 21 is based on the electricity rate setting read from the storage unit 24 through the base unit control unit 20 and the time accumulated power amount data acquired from the power measurement unit 1. The electricity charge is calculated for each time zone of the belt and the electricity charge for one day yesterday is calculated by summing up the electricity charges. Then, the calculated electricity charge is transmitted from the parent device calculation unit 21 to the parent device control unit 20, and the parent device control unit 20 displays the amount of the electricity charge on the display unit 25.

  Thus, according to the present embodiment, the power amount measured by the power measurement unit 1 is displayed on the interphone main unit 2 that is a display unit by replacing the power amount measured by the power measurement unit 1 with an electricity charge. Compared to the case, the user's awareness of power saving can be improved. And since the measured value of electric energy is matched with measurement time, for example, even when an electricity bill changes with time zones, an electricity bill can be calculated more correctly. In addition, the power measurement unit 1 stores the time integrated power amount obtained by integrating the measured value of the power amount in units of one hour in the storage unit 13, and in the base unit 2, the base unit calculation unit 21 calculates the electricity bill for one day. When this is done, the time integrated power amount for 24 hours stored in the storage unit 13 of the power measuring unit 1 is received in a lump, so that the base unit computing unit 21 receives the measured values (integrated for 24 hours) from the power measuring unit 1. Compared with the case of receiving (electric power amount), the amount of data can be reduced, and there is an advantage that the time to calculate and display the electricity bill can be shortened and the usability is improved. Furthermore, in this embodiment, since the intercom base unit 2 is also used as a display unit, there is an advantage that a space for installing the display unit is not required and space can be saved.

1 Power measurement unit 2 Interphone main unit (display unit)
12 Timer (clock means)
13 Storage unit (storage means)
21 Master unit calculation unit
25 Display (display means)

Claims (3)

A power measurement unit that measures the amount of power supplied from the power system, and a display unit that displays the amount of power measured by the power measurement unit,
The power measurement unit includes clock means for measuring time, and storage means for storing in association with the time when the measurement value of the electric energy is measured,
The display unit is calculated by the calculation means and the calculation means for calculating the electricity bill for the integrated power amount within a predetermined period based on the measurement value stored in the storage means of the power measurement unit and the measurement time of the measurement value. A power monitoring system comprising display means for displaying the electricity rate. The power measuring unit stores the integrated value obtained by integrating the measured value of the electric energy in units of one hour in the storage means,
The display unit receives the integrated values for 24 hours stored in the storage unit of the power measurement unit collectively when calculating the electricity bill for one day by the calculation unit. Power monitoring system.   3. The power monitoring system according to claim 1, wherein the display unit is provided integrally with an interphone master unit that is installed in a house and forms an interphone system together with a door phone unit outside the house.

Images