JP2013200289A - Abnormality detection device, abnormality detection method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a false detection of abnormality to be prevented.SOLUTION: In an abnormality detection device 1, a cumulative time slot, which is compared with a measurement time slot when power consumption exceeds a cumulative maximum value, stored in a cumulative time slot storing section 26 is a logical product of an interim time slot that an interim time slot section 13 newly identifies and the interim time slot hitherto obtained by the interim time slot section 13. By obtaining the logical product, the abnormality detection device 1 enables the cumulative time slot stored in the cumulative time slot storing section 26 to be a time slot except the time slot with operation of only electric equipment which irregularly operates as well as the time slot with the electric equipment in a standby state, in other words, to be the time slot when a resident uses the electric equipment as well as the time slot when the resident uses the same together with the operation of the electric equipment which irregularly operates. Thus, the abnormality detection device 1 can accurately detect the power consumption not more than the cumulative maximum value although in the time slot when the power consumption exceeds the cumulative maximum value.

Description

  The present invention relates to an abnormality detection device, an abnormality detection method, and a program.

  As a technique for detecting an abnormality that has occurred in a resident based on the amount of electric power used by an electric device installed indoors per hour, there is an electric usage amount notification system described in Patent Document 1.

  The electricity usage amount notification system described in Patent Literature 1 compares the measured usage amount with a predetermined threshold value, identifies a time period in which the usage amount is equal to or less than the threshold value, and It is recorded as a non-use time zone when no electrical equipment is used. After that, if the usage amount does not decrease even when it becomes the time zone corresponding to the stored non-use time zone, the electrical usage amount notification system will cause the resident to be abnormal such that the electrical equipment cannot be disabled. It is determined that a failure has occurred, and an abnormality is notified. In addition, if the amount of usage does not increase even when the corresponding time other than the stored non-use time is reached, the electricity usage notification system will cause the resident to be unable to start using the electrical equipment. It is determined that a failure has occurred, and an abnormality is notified.

JP 2006-349219 A

  Here, the electricity usage amount notification system described in Patent Document 1 uses a non-use time zone in which the resident is not using the electric device as information used for determining whether or not there is an abnormality. As described above, this non-use time zone is a time zone specified when the usage amount is equal to or less than the threshold, and is a time zone specified by the usage amount on a plurality of days. Therefore, when an electrical device (for example, a refrigerator, a toilet seat with a heater, etc.) in which the operating time zone fluctuates irregularly is arranged because it operates irregularly, the resident may change depending on the operating status of the electrical device. In spite of not using the electric device, there is a case where the amount of use exceeds the threshold value, and a non-use time zone is generated. For this reason, there is a possibility that a large deviation may occur between the specified non-use time zone and the usage pattern of the electric device by the resident, and there is a problem that an abnormality may be erroneously detected.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an abnormality detection device, an abnormality detection method, and a program that can prevent erroneous detection of an abnormality.

  In order to achieve the above object, the power measurement storage unit of the first abnormality detection device according to the present invention periodically measures the power consumption of the target electrical device, and specifies the measurement timing for the measured power consumption. Are stored in association with each other. The time zone measurement storage unit obtains the power consumption amount for each time zone of the target electrical device, and stores the obtained power consumption amount and the time zone in association with each other. The minimum value time zone specifying unit executes a process of specifying a time zone in which the power consumption for each time zone obtained by the time zone measurement storage unit shows the minimum value every time a predetermined period elapses. The maximum specifying unit specifies a maximum one of the power consumptions whose measurement timings belong to the time zone specified by the minimum value time zone specifying unit from the power consumptions stored in the power measurement storage unit. The maximum storage unit stores the largest one of the power consumption specified by the maximum specifying unit. The time zone identification unit compares the reference value determined based on the power consumption stored in the maximum storage unit with the power consumption amount stored in the time zone measurement storage unit for each time zone, and the consumption exceeding the reference value The time zone associated with the electric energy is specified. The time zone storage unit stores the time zone specified by the time zone specifying unit. When the power consumption measured by the power measurement storage unit is newly stored in the power measurement storage unit and the time zone is newly specified by the time zone specifying unit, the determination unit newly specifies the time zone and the time zone The time zone stored in the storage unit is compared with the time zone previously specified by the time zone specifying unit, and when the specified time zone is included in the stored time zone, it is determined as abnormal.

  In order to achieve the above object, the power measurement storage unit of the second abnormality detection device according to the present invention periodically measures the power consumption of the target electrical device, and specifies the measurement timing of the measured power consumption. And stored in association with information to be performed. The time zone measurement storage unit obtains the power consumption amount for each time zone of the target electrical device, and stores the obtained power consumption amount and the time zone in association with each other. The minimum value time zone specifying unit executes a process of specifying a time zone in which the power consumption for each time zone obtained by the time zone measurement storage unit shows the minimum value every time a predetermined period elapses. The maximum specifying unit specifies a maximum one of the power consumptions whose measurement timings belong to the time zone specified by the minimum value time zone specifying unit from the power consumptions stored in the power measurement storage unit. The maximum storage unit stores the largest one of the power consumption specified by the maximum specifying unit. The time zone specifying unit compares the reference value determined based on the power consumption stored in the maximum storage unit and the power consumption amount stored in the time zone measurement storage unit for each time zone, and is equal to or less than the reference value. The time zone associated with the power consumption is specified. The execution unit causes the time zone specifying unit to specify during a predetermined accumulation period. The frequency unit obtains, for each time zone, a frequency indicating a power consumption amount equal to or less than a reference value from the number of times the time zone is specified by the time zone specifying unit and the cumulative period. After the execution by the execution unit is completed, the number of times storage unit stores the power consumption measured in the power measurement storage unit. When the time zone is specified by the time zone specifying unit, the number of times storage unit stores the specified number of times for each time zone. The determination unit uses the frequency obtained by the frequency unit as a radix and obtains a value calculated using the number of times stored in the number storage unit as an index for each time zone. If the obtained value is equal to or less than a threshold, it is determined as abnormal. .

  According to the present invention, it is possible to prevent erroneous detection of abnormality.

It is a figure which shows arrangement | positioning of the abnormality detection apparatus which concerns on Embodiment 1 of this invention. 1 is a block diagram of an abnormality detection device according to Embodiment 1. FIG. It is a figure which shows the content memorize | stored in RAM and a memory | storage part. It is a figure which shows the content memorize | stored in a memory | storage part. It is a flowchart which shows an accumulation process. It is a flowchart which shows an abnormality detection process. It is a block diagram of the abnormality detection apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows the content memorize | stored in an update type | formula, a judgment type | formula, and a memory | storage part. 6 is a flowchart illustrating an accumulation process executed by the abnormality detection device according to the second embodiment. 6 is a flowchart showing an abnormality detection process executed by the abnormality detection device according to the second embodiment.

(Embodiment 1)
Hereinafter, an abnormality detection apparatus 1 according to Embodiment 1 of the present invention will be described with reference to FIGS.

  The anomaly detection device 1 detects an anomaly that suddenly occurs in a occupant from the amount of power consumed by an electric device 100 such as an air conditioner, a microwave oven, a refrigerator, or a toilet seat with a heater disposed indoors.

  As shown in FIG. 1, the abnormality detection device 1 is built in a distribution board 70 that distributes power from an electric power company transmitted through an indoor supply line 60 using an indoor wiring 80. The electric power distributed by the distribution board 70 is supplied to the electric device 100 through the outlet 90 connected to the indoor wiring 80.

  As shown in FIG. 2, the abnormality detection apparatus 1 includes a calculation unit 10, a storage unit 20, a PT sensor 31, a CT sensor 32, an A / D converter 33, an input unit 34, a display unit 35, An interface 36 and a bus line BL are provided.

  The calculation unit 10 controls the abnormality detection device 1 and performs various calculations necessary for detecting an abnormality. The arithmetic unit 10 includes a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), and a clock (not shown).

  The CPU executes a program (for example, a program that realizes processing shown in FIGS. 5 to 6 described later) stored in the ROM.

  In addition, when the CPU executes a program stored in the ROM, the calculation unit 10 includes a power measurement unit 11, a provisional maximum value unit 12, a provisional time zone unit 13, a cumulative maximum value unit 14, and a cumulative time. The functions of the band unit 15, the power amount abnormality determination unit 16, and the time zone abnormality determination unit 17 are realized.

  The power measuring unit 11 periodically measures the power consumption of the electric device 100 from the line voltage applied to the indoor wiring 80 and the current flowing through the indoor wiring 80 (in this embodiment, every second), The measured power consumption is stored in the RAM in association with the measurement timing, specifically, the measurement time. The measurement time is measured by a clock provided in the calculation unit 10.

  The information stored in the RAM by the power measurement unit 11 is, for example, as shown in “Measurement data” illustrated in FIG. 3. That is, the information stored in the RAM is information in which the power consumption measured periodically and the measurement time are associated with each other. In the present embodiment, the power measurement unit 11 sets the measured power consumption every minute, as well as a set of 24 hours of the measured power consumption, as in “measurement data” illustrated in FIG. 3. (Every 24 hours).

  In addition, when one minute has elapsed from the start of measurement, the power measuring unit 11 reads the power consumption at the measurement time belonging to the one minute from the RAM, and calculates the average value of the read power consumption, thereby obtaining the power consumption amount. . Further, the power measuring unit 11 calculates a measurement time zone from the measurement time associated with the read power consumption. Thereafter, the power measuring unit 11 stores the obtained power consumption amount and the measurement time zone in the power amount storage unit 21 in association with each other.

  The information stored in the power amount storage unit 21 by the power measurement unit 11 is, for example, as shown in “power consumption” shown in FIG. 3. That is, the information stored in the power amount storage unit 21 is information in which the power consumption amount and the measurement time zone are associated with each other. In the present embodiment, the power measurement unit 11 sets a power consumption amount for each measurement time zone and a set of power consumption amounts for 24 hours, as in “power consumption amount” illustrated in FIG. 3. (Divided every 24 hours) and stored in the RAM.

  In addition, the power measurement unit 11 obtains the maximum value of the power consumption at the measurement time belonging to one minute by searching for the maximum value from the power consumption read from the RAM, and calculates the maximum value in advance. It is stored in the maximum value storage unit 22 in association with the measurement time zone.

  Information stored in the maximum value storage unit 22 by the power measurement unit 11 is, for example, as shown in “maximum value” illustrated in FIG. 3. That is, the information stored in the maximum value storage unit 22 is information in which the maximum value for one minute is associated with the measurement time zone. In the present embodiment, the power measurement unit 11 sets the maximum value for each measurement time zone, and further, for 24 hours, the maximum value of power consumption, as shown in “maximum value” shown in FIG. Store as a set (every 24 hours) in RAM.

  In the present embodiment, the power measurement unit 11 repeatedly stores the power consumption, the power consumption amount, and the maximum value in the RAM while the power of the abnormality detection device 1 is turned on every time one minute elapses. Do.

  Note that the voltage applied to the indoor wiring 80 is measured by the PT sensor 31, and the current flowing through the indoor wiring 80 is measured by the CT sensor 32.

  The provisional maximum value unit 12 stores the power consumption amount for each latest measurement time period for 24 hours when 24 hours have elapsed since the start of measurement or when 24 hours have elapsed since the previous 24 hours have elapsed. The minimum value is retrieved from the read power consumption amount. And the provisional maximum value part 12 specifies the measurement time slot | zone in which power consumption amount shows the minimum value by specifying the measurement time slot | zone matched with the searched power consumption amount.

  Thereafter, the provisional maximum value unit 12 searches the maximum value storage unit 22 for a measurement time zone that matches the obtained time zone (measurement time zone in which the power consumption indicates the minimum value), and associates it with the searched measurement time zone. The maximum value obtained is read from the maximum value storage unit 22. Thereby, the provisional maximum value unit 12 obtains the maximum value of the power consumption in the measurement time zone in which the power consumption is the minimum value. Thereafter, the provisional maximum value unit 12 stores the obtained maximum value in the provisional maximum value storage unit 23 as a provisional maximum value.

  As described above, the provisional maximum value obtained by the provisional maximum value unit 12 is the maximum power consumption in the measurement time zone in which the amount of power consumption indicates the minimum value. Therefore, the provisional maximum value is the maximum power consumption when the resident is not using the electric device 100 and the electric device 100 that operates irregularly is not operating (for example, the electric device 100 is in a standby state). The maximum power consumption in the case of

  The provisional maximum value unit 12 repeats the above-described operation for 30 days every 24 hours.

  The provisional maximum value stored in the provisional maximum value storage unit 23 by the provisional maximum value unit 12 is, for example, as shown in “provisional maximum value” illustrated in FIG. 4. The “provisional maximum value” described in FIG. 4 assumes a case where the measurement data stored in the RAM is as shown in FIG. Therefore, the provisional maximum value stored in the provisional maximum value storage unit 23 by the provisional maximum value unit 12 is associated with the measurement time zone (0:01) in which the power consumption is the minimum value, and the maximum value storage unit. It becomes 8W memorize | stored in 22.

  The provisional time zone unit 13 reads the provisional maximum value from the provisional maximum value storage unit 23 when 24 hours have elapsed from the start of measurement, or when another 24 hours have elapsed from the previous 24 hours, and the provisional maximum value read out The power consumption exceeding the value is searched from the power consumption stored in the power storage unit 21. Then, the provisional time zone unit 13 reads the measurement time zone associated with the searched power consumption amount from the power amount storage unit 21. Thereby, provisional time zone part 13 specifies the measurement time zone which shows the amount of power consumption exceeding the provisional maximum value.

  Thereafter, the provisional time zone unit 13 stores the specified measurement time zone in the provisional time zone storage unit 24 as a provisional time zone.

  As described above, the provisional time zone unit 13 specifies a measurement time zone indicating the power consumption exceeding the provisional maximum value. Here, the provisional maximum value can be estimated as the maximum power consumption when the resident is not using the electric device 100 and the electric device 100 that operates irregularly is not operating. Therefore, in the measurement time zone specified by the provisional time zone unit 13 as indicating the power consumption exceeding the provisional maximum value, the resident does not use the electric device 100 and the electric device 100 operates irregularly. The time zone excluding the time zone in which the electronic device 100 is not operating, in other words, the time zone in which the resident is using the electrical device 100, the time zone in which the electrical device 100 operating irregularly is operating, or the resident The electric device 100 is used, and the electric device 100 that operates irregularly can also be a time zone in which the device is operating.

  The provisional time zone unit 13 repeats the above operation for 30 days every 24 hours.

  The provisional time zone stored in the provisional time zone storage unit 24 by the provisional time zone unit 13 is, for example, as shown in “provisional time zone” illustrated in FIG. 4. The “provisional time zone” described in FIG. 4 assumes a case where the measurement data stored in the RAM is as shown in FIG. Therefore, the provisional time zone stored in the provisional time zone storage unit 24 is stored in the power amount storage unit 21 in association with the power consumption amount exceeding 8 W, which is the provisional maximum value stored in the provisional maximum value storage unit 23. Measurement time zone, that is, 4: 0 to 0:59 (starting from 4:00:00, going around 23:00, and ending immediately before 10:00) . In other words, the tentative time zone stored in the tentative time zone storage unit 24 excludes the 10:00 to 3:59 zone associated with the power consumption amount of 8 W or less which is the provisional maximum value. It becomes time zone.

  In addition, the temporary time zone memorize | stored in the temporary time zone memory | storage part 24 is not restricted to the information expressing a time zone. For example, the provisional time zone storage unit 24 is set to a flag indicating 0 or 1 for each measurement time, and the provisional time zone unit 13 is set to a flag corresponding to the specified measurement time zone, for example, 1 and corresponds to a measurement time zone that is not specified. By setting the flag to be 0, the specified measurement time zone may be stored. In this case, since the specified measurement time zone can be stored as binary information, an increase in the amount of information can be suppressed.

  The cumulative maximum value portion 14 is a new provisional maximum value newly determined by the provisional maximum value portion 12 (newly provisional temporary value) when 24 hours have elapsed from the start of measurement or when 24 hours have elapsed since the previous 24 hours have elapsed. The provisional maximum value stored in the maximum value storage unit 23)) and the largest provisional maximum value obtained so far by the provisional maximum value unit 12 (already stored in the cumulative maximum value storage unit 25) And the newly determined provisional maximum value exceeds the largest value so far, the newly determined provisional maximum value is stored in the accumulation maximum value storage unit 25. . In other words, the cumulative maximum value unit 14 updates the cumulative maximum value stored in the cumulative maximum value storage unit 25.

  In the present embodiment, the cumulative maximum value unit 14 repeats the above-described operation for 30 days every 24 hours.

  The cumulative maximum value stored in the cumulative maximum value storage unit 25 by the cumulative maximum value unit 14 is, for example, as shown in “cumulative maximum value” illustrated in FIG. 4. The “cumulative maximum value” described in FIG. 4 is a case where the measurement data stored in the RAM is the one shown in FIG. 3 (the temporary maximum value newly stored in the temporary maximum value storage unit 23 is It is assumed that the accumulated maximum value before the update is 7.9 W. Therefore, the cumulative maximum value stored in the cumulative maximum value storage unit 25 is 8 W, which is the temporary maximum value newly stored in the temporary maximum value storage unit 23.

  When 24 hours have elapsed since the start of measurement, or when 24 hours have elapsed since the previous 24 hours, the cumulative time zone unit 15 newly specifies the temporary time zone (newly provisional The provisional time zone stored in the time zone storage unit 24) and the provisional time zone obtained by the provisional time zone unit 13 (accumulated time zone already stored in the cumulative time zone storage unit 26) are retained. The accumulated time zone storage unit 26 stores the above. Specifically, the cumulative time zone unit 15 includes a provisional time zone newly identified by the provisional time zone unit 13 (a provisional time zone newly stored in the provisional time zone storage unit 24) and a provisional time zone so far. The logical product with the provisional time zone obtained by the unit 13 (the cumulative time zone already stored in the cumulative time zone storage unit 26) is obtained, and the obtained logical product is stored in the cumulative time zone storage unit 26. By obtaining the logical product in this way, the accumulated time zone stored in the accumulated time zone storage unit 26 is the time zone in which only the electrical device 100 that operates irregularly or the electrical device 100 is in the standby state. In the time zone other than the time zone, in other words, the time zone in which the resident uses the electric device 100, and the electric device 100 in which the resident uses the electric device 100 and operates irregularly. Can also be in the operating time zone.

  In the present embodiment, the cumulative time zone unit 15 repeats the above operation for 30 days every 24 hours.

  The accumulated time zone stored in the accumulated time zone storage unit 26 by the accumulated time zone unit 15 is, for example, as shown in “Accumulated time zone” illustrated in FIG. 4. The “cumulative time zone” described in FIG. 4 is a case where the measurement data stored in the RAM is the one shown in FIG. 3 (in detail, it is newly stored in the provisional time zone storage unit 24). The provisional time zone is 4: 0 to 0:59), and the accumulated time zone already stored in the accumulated time zone storage unit 26 is 4: 0 to 23:59. The case where it was a time zone is assumed. Therefore, the cumulative time zone stored in the cumulative time zone storage unit 26 is from 4: 0 to 23:59.

  Note that the accumulated time zone stored in the accumulated time zone storage unit 26 is not limited to information representing the time zone. For example, the cumulative time zone storage unit 26 is set to a flag indicating 0 or 1 for each measurement time, and the cumulative time zone unit 15 is set to 1, for example, a flag corresponding to the specified measurement time zone, and corresponds to a measurement time zone that is not specified. By setting the flag to be 0, the specified measurement time zone may be stored. In this case, since the specified measurement time zone can be stored as binary information, an increase in the amount of information can be suppressed.

  The power amount abnormality determination unit 16 completes updating of the storage contents of the cumulative maximum value storage unit 25 and the cumulative time zone storage unit 26 (reflecting the resident's life pattern), and thereafter, the abnormality determination is performed by the resident or the like. When power consumption is measured by the power measuring unit 11 when instructed by the user, the accumulated maximum value stored in the accumulated maximum value storage unit 25 is used as a reference value, and the accumulated maximum value and the energy storage unit 21 are stored. The stored power consumption amount is compared, and a power consumption amount that does not exceed the cumulative maximum value (in other words, a power consumption amount that is less than or equal to the cumulative maximum value) is retrieved from the power amount storage unit 21. Thereafter, the power amount abnormality determination unit 16 specifies the measurement time zone stored in association with the power consumption amount that is equal to or less than the searched cumulative maximum value from the power amount storage unit 21 and stores it in the provisional time zone storage unit 24. To do.

  Here, the power amount abnormality determination unit 16 determines that there is an abnormality when the power consumption amount that is less than or equal to the accumulated maximum value cannot be searched. This is because, although there is usually a time zone where the power consumption is less than the cumulative maximum value within 24 hours, this is not searched, and the resident becomes inoperable. This is because the use of the device 100 may not be stopped.

  In the anomaly detection apparatus 1 of the present embodiment, the power measurement is performed until the update of the stored contents of the accumulated maximum value storage unit 25 and the accumulated time zone storage unit 26 (reflection of the resident's life pattern) is completed. 30 days from the start of measurement by the unit 11.

  The time zone abnormality determination unit 17 specifies a measurement time zone in which the power consumption is less than the accumulated maximum value by the power amount abnormality determination unit 16, and stores the specified measurement time zone in the provisional time zone storage unit 24. Then, the time zone excluding the stored measurement time zone, that is, the measurement time zone where the power consumption exceeds the cumulative maximum value is compared with the cumulative time zone stored in the cumulative time zone storage unit 26. And when the measurement time slot | zone used as the power consumption amount exceeding the accumulation maximum value is included (included) in the accumulation time slot | zone memorize | stored in the accumulation time slot | zone memory | storage part 26, the time slot | zone abnormality determination part 17 is abnormal. judge. Although this is a time zone where the power consumption usually exceeds the cumulative maximum value, the power consumption is below the cumulative maximum value during that time zone, so the resident cannot act This is because there is a possibility that the electric device 100 such as an electric lamp cannot be used.

  The storage unit 20 is a flash memory, for example. The storage unit 20 includes an electric energy storage unit 21, a maximum value storage unit 22, a provisional maximum value storage unit 23, a provisional time zone storage unit 24, a cumulative maximum value storage unit 25, and a cumulative time zone storage unit 26. It is equipped with.

  The power amount storage unit 21 further stores information in which the power consumption amount and the measurement time zone are associated with each other by the power measurement unit 11 for 24 hours from the start of measurement by the power measurement unit 11 or from the passage of the previous 24 hours. After 24 hours have elapsed, 24 hours, ie, one day, is stored (see “power consumption” shown in FIG. 3).

  The maximum value storage unit 22 stores information in which the maximum value of power consumption and the measurement time zone are associated by the power measurement unit 11 for 24 hours from the start of measurement by the power measurement unit 11 or the passage of the previous 24 hours. 24 hours after the lapse of 24 hours, that is, one day, is stored (see “maximum value” shown in FIG. 3).

  The provisional maximum value storage unit 23 shows the lowest power consumption for 24 hours from the start of measurement by the power measurement unit 11 or 24 hours after 24 hours have elapsed since the previous 24 hours. The maximum value of power consumption in the measurement time zone, that is, the provisional maximum value is stored (see “provisional maximum value” described in FIG. 4). This maximum value is obtained by the provisional maximum value unit 12.

  The provisional time zone storage unit 24 is a power consumption amount that exceeds the provisional maximum value for 24 hours from the start of measurement by the power measurement unit 11 or 24 hours after another 24 hours have passed since the previous 24 hours. Is stored, that is, a provisional time zone is stored (see “provisional time zone” shown in FIG. 4). This measurement time zone is obtained by the provisional time zone unit 13.

  The accumulated maximum value storage unit 25 stores the accumulated maximum value obtained by the accumulated maximum value unit 14, that is, the largest provisional maximum value among the provisional maximum values obtained by the provisional maximum value unit 12 for 30 days.

  The cumulative time zone storage unit 26 stores the cumulative time zone specified by the cumulative time zone unit 15, that is, the measurement time zone specified by the provisional time zone unit 13 even once every 30 days.

  The PT sensor 31 measures a line voltage applied to the indoor wiring 80. One end of the input terminal of the PT sensor 31 is connected to one side of the indoor wiring 80, and the other end of the input terminal of the PT sensor 31 is connected to the other side of the indoor wiring 80. The PT sensor 31 outputs the measured voltage value (analog value) to the A / D converter 33.

  The CT sensor 32 measures the current flowing through the indoor wiring 80. The CT sensor 32 is connected in series to one of the indoor wirings 80. The CT sensor 32 outputs the measured current value (analog value) to the A / D converter 33.

  The A / D converter 33 is an analog-to-digital converter, which converts the voltage value (analog value) output from the PT sensor 31 or the current value (analog value) output from the CT sensor 32 into a digital value, and converts it to a bus. Output to line BL.

  Using the digital voltage value and current value output from the A / D converter 33 to the bus line BL, the power measurement unit 11 measures the amount of power consumed by the electrical device 100.

  The input unit 34 is, for example, a push button switch. The input unit 34 is operated by a user who instructs an update of the accumulated maximum value stored in the accumulated maximum value storage unit 25 and an accumulated time zone stored in the accumulated time zone storage unit 26 or an execution of abnormality determination. Accept the operation.

  The display unit 35 is, for example, a liquid crystal display. The display unit 35 displays a screen for notifying abnormality.

  The interface 36 mediates communication with an external device such as a computer installed in a security company, for example.

  The bus line BL connects the arithmetic unit 10, the storage unit 20, the A / D converter 33, the input unit 34, the display unit 35, and the interface 36 to each other.

  The accumulation process executed by the above-described abnormality detection device 1 will be described with reference to FIG. In the accumulation process, the life pattern of the resident (the usage pattern of the electric device 100 by the resident) is stored in the accumulated maximum value stored in the accumulated maximum value storage unit 25 and the accumulated time zone stored in the accumulated time zone storage unit 26. It is a process to reflect. The accumulation process is started when an operation of the input unit 34 is performed by a user who commands execution.

  The accumulation process is executed when the abnormality detection device 1 is newly installed on the distribution board 70 or when the electric device 100 is newly installed indoors.

  In the accumulation process, first, the calculation unit 10 (power measurement unit 11) has the line voltage applied to the indoor wiring 80 measured by the RT sensor 31 and the current flowing through the indoor wiring 80 measured by the CT sensor 32. Then, the power consumption consumed by the electric device 100 is measured, and the measured power consumption is stored in the RAM in association with the measurement time (step S1).

  Thereafter, the calculation unit 10 (power measurement unit 11) acquires the latest measurement time stored in the RAM to determine whether or not the measurement period has elapsed, specifically, whether or not the measurement for one minute has been completed. (Step S2). If the calculation part 10 (electric power measurement part 11) determines with the measurement period not having passed (step S2: No), it will return to step S1.

  On the other hand, if the calculating part 10 (electric power measurement part 11) determines with the measurement for 1 minute having been completed (step S2: Yes), it will perform step S3. In other words, the calculation unit 10 (power measurement unit 11) reads the power consumption for one minute from the RAM and calculates the average value of the read power consumption, thereby obtaining the power consumption amount. Moreover, the calculating part 10 (electric power measurement part 11) calculates a measurement time slot | zone from the measurement time matched with the read power consumption. Thereafter, the calculation unit 10 (power measurement unit 11) stores the obtained power consumption amount and the measurement time zone in the power amount storage unit 21 in association with each other.

  Note that the information stored in the power amount storage unit 21 by the power measurement unit 11 is, for example, the “power consumption” shown in FIG. 3.

  After execution of step S3, calculation unit 10 (power measurement unit 11) executes step S4. That is, the calculation unit 10 (power measurement unit 11) searches for the maximum value from the power consumption (power consumption measured in one minute) read from the RAM in step S3, thereby maximizing the power consumption in one minute. A value is obtained, and this maximum value is stored in the maximum value storage unit 22 in association with the measurement time zone calculated in step S3.

  Here, the information memorize | stored in the maximum value memory | storage part 22 by the electric power measurement part 11 becomes what is shown to the "maximum value" of FIG. 3, for example.

  After execution of step S4, the calculation unit 10 (power measurement unit 11) determines whether or not the set period has elapsed, specifically, 24 hours from the start of measurement by the power measurement unit 11 or the previous 24 hours. It is determined by acquiring the measurement time memorize | stored in RAM whether 24 hours have passed since progress (step S5). If the calculating part 10 (electric power measurement part 11) determines with the setting period not having passed (step S5: No), it will return to step S1.

  On the other hand, if the calculating part 10 (electric power measurement part 11) determines with the setting period having passed (step S5: Yes), it will transfer to step S6.

  In step S <b> 6, the calculation unit 10 (temporary maximum value unit 12) reads the power consumption amount from the power amount storage unit 21 and searches for the minimum value among the read power consumption amounts. And the calculating part 10 (temporary maximum value part 12) specifies the measurement time slot | zone in which power consumption amount shows the minimum value by specifying the measurement time slot | zone matched with the searched power consumption amount (step) (step) S6). Thereby, the calculating part 10 (provisional maximum value part 12) specifies the measurement time slot | zone in which the power consumption showed the minimum value.

  Thereafter, the calculation unit 10 (temporary maximum value unit 12) executes Step S7. In other words, the calculation unit 10 (the provisional maximum value unit 12) has the measurement time zone stored in the maximum value storage unit 22 in the measurement time zone that matches the specified time zone (the measurement time zone in which the power consumption indicates the minimum value). The maximum value associated with the searched measurement time zone is read from the maximum value storage unit 22. Thereby, the provisional maximum value unit 12 obtains the maximum value of power consumption in the measurement time zone in which the power consumption is the minimum value, that is, the provisional maximum value. Thereafter, the provisional maximum value unit 12 stores the obtained maximum value (provisional maximum value) in the provisional maximum value storage unit 23.

  Here, the provisional maximum value stored in the provisional maximum value storage unit 23 by the provisional maximum value unit 12 is, for example, shown in “provisional maximum value” illustrated in FIG. 4.

  Thereafter, the calculation unit 10 (provisional time zone unit 13) executes Step S8. That is, the calculation unit 10 (provisional time zone unit 13) reads the provisional maximum value stored in the provisional maximum value storage unit 23, and uses the read provisional maximum value as a reference, and calculates the power consumption exceeding this cumulative maximum value, A search is made from the power consumption stored in the power storage unit 21. Then, the calculation unit 10 (provisional time zone unit 13) reads the measurement time zone associated with the searched power consumption amount from the power amount storage unit 21. Thereby, the calculating part 10 (provisional time slot | zone part 13) specifies the measurement time slot | zone which shows the power consumption exceeding a temporary maximum value, ie, a temporary time slot | zone. That is, the calculation unit 10 (provisional time zone unit 13) is a time zone in which the resident uses the electrical device 100, a time zone in which the electrical device 100 that operates irregularly, or a resident is in the electrical device. 100 is used, and the time zone in which the electric device 100 that operates irregularly is also operating is specified. Thereafter, the calculation unit 10 (provisional time zone unit 13) stores the specified measurement time zone (provisional time zone) in the provisional time zone storage unit 24.

  Here, the time zone memorize | stored in the provisional time zone memory | storage part 24 by the provisional time zone part 13 becomes as shown in the "provisional time zone" of FIG. 4, for example.

  Thereafter, the calculation unit 10 (cumulative maximum value unit 14) executes Step S9. In other words, the calculation unit 10 (cumulative maximum value unit 14) has the provisional maximum value newly obtained by the provisional maximum value unit 12 (the provisional maximum value newly stored in the provisional maximum value storage unit 23), and so far. The maximum provisional maximum value obtained by the provisional maximum value unit 12 (cumulative maximum value already stored in the cumulative maximum value storage unit 25) is compared, and the newly obtained provisional maximum value has been the largest so far. When the value exceeds the maximum value, the newly determined provisional maximum value is stored in the accumulated maximum value storage unit 25. That is, the cumulative maximum value unit 14 updates the cumulative maximum value to the largest provisional maximum value.

  Here, the cumulative maximum value stored in the cumulative maximum value storage unit 25 by the cumulative maximum value unit 14 is, for example, as shown in “cumulative maximum value” illustrated in FIG. 4.

  Then, the calculation unit 10 (cumulative time zone unit 15) executes Step S10. In other words, the calculation unit 10 (cumulative time zone unit 15) temporarily sets the temporary time zone newly specified by the temporary time zone portion 13 (the temporary time zone newly stored in the temporary time zone storage unit 24). The provisional time zone (accumulated time zone already stored in the cumulative time zone storage unit 26) obtained by the time zone unit 13 is retained and stored in the cumulative time zone storage unit 26. Specifically, the calculation unit 10 (cumulative time zone unit 15) includes a provisional time zone newly specified by the provisional time zone unit 13 (a provisional time zone newly stored in the provisional time zone storage unit 24), The logical product of the provisional time zone (accumulated time zone already stored in the cumulative time zone storage unit 26) obtained by the provisional time zone unit 13 is obtained and the obtained logical product is obtained as the cumulative time zone storage unit 26. To remember.

  Here, the cumulative time zone stored in the cumulative time zone storage unit 26 by the cumulative time zone unit 15 is, for example, shown in “cumulative time zone” illustrated in FIG. 4.

  Thereafter, the calculation unit 10 (CPU) stores in the RAM a set of whether or not the accumulation period has elapsed, specifically, whether or not 30 days have elapsed since the accumulation process was started. It is determined from the number of sets of measured data (step S11). If the calculation part 10 (CPU) determines with the accumulation period not having passed (step S11: No), it will return to step S1. On the other hand, if the calculation part 10 (CPU) determines with the accumulation period having passed (step S11: Yes), it will complete | finish an accumulation process.

  In this way, during the accumulation period, the accumulated maximum value and the accumulated time are updated by updating the accumulated maximum value stored in the accumulated maximum value storage unit 25 and the accumulated time zone stored in the accumulated time zone storage unit 26. The belt can reflect the life pattern of the resident (the usage pattern of the electric device 100 by the resident).

  Next, the abnormality detection process executed by the abnormality detection device 1 will be described with reference to FIG. In the abnormality detection process, whether or not there is a possibility that an abnormality has occurred in the resident from the power consumption amount stored in the power amount storage unit 21 by the power measurement unit 11 (see “power consumption amount” described in FIG. 3). It is the process which determines. The abnormality detection process is started when an operation of the input unit 34 is performed by a user who commands execution, and is then repeatedly executed every predetermined time (for example, every 30 minutes).

  In the abnormality detection process, first, the calculation unit 10 (power measurement unit 11) determines whether or not the power consumption amount is already stored in the power amount storage unit 21 (step S21). In the abnormality detection process, the power consumption amount stored in the power amount storage unit 21 is calculated every time the set period elapses, specifically, when 24 hours have elapsed from the start of measurement in step S21, or the previous time It is cleared when 24 hours elapse from the elapse of 24 hours.

  When the calculation unit 10 (power measurement unit 11) determines that one minute has not elapsed since the power amount storage unit 21 was cleared and the power amount storage unit 21 does not store the power consumption amount (step S21: No). ) From the line voltage applied to the indoor wiring 80 measured by the RT sensor 31 and the current flowing through the indoor wiring 80 measured by the CT sensor 32, the power consumption used in the electrical device 100 is measured. The measured power consumption is stored in the RAM in association with the measurement time (step S23).

  On the other hand, when the calculation unit 10 (power measurement unit 11) determines that the power consumption amount is already stored in the power amount storage unit 21 (step S21: Yes), the power amount storage unit is associated with the power consumption amount. It is determined whether or not the measurement time zone stored in 21 is the time zone stored in the cumulative time zone storage unit 26 (step S22).

  In step S <b> 22, the calculation unit 10 (power measurement unit 11) determines the measurement time zone associated with the power consumption amount and stored in the power amount storage unit 21 in the time zone stored in the cumulative time zone storage unit 26. If it is determined that there is not (step S22: No), the process proceeds to step S23, the power consumption used in the electric device 100 is measured, and the measured power consumption is stored in the RAM in association with the measurement time.

  As described above, the power consumption in the measurement time zone other than the cumulative time zone stored in the cumulative time zone storage unit 26, in other words, the power consumption in the time zone indicating the power consumption amount that is usually equal to or less than the cumulative maximum value. By measuring and storing in the RAM, the calculation unit 10 (power measurement unit 11) is accumulatively accumulated in that time zone even though it is a time zone indicating the power consumption that is usually below the maximum accumulated value. It is possible to detect the state of power consumption exceeding the maximum value in later processing.

  After execution of step S23, the calculation unit 10 (power measurement unit 11) determines whether or not the measurement period has elapsed, specifically, whether or not the measurement for one minute has been completed, and the measurement time stored in the RAM. Is obtained (step S24). If the calculating part 10 (electric power measurement part 11) determines with the measurement period not having passed (step S24: No), it will return to step S21.

  On the other hand, if the calculating part 10 (electric power measurement part 11) determines with the measurement period having passed (step S24: Yes), it will perform step S25. That is, the calculation unit 10 (power measurement unit 11) reads out the power consumption measured for one minute from the RAM, and calculates the average value of the read power consumption, thereby obtaining the power consumption amount. Moreover, the calculating part 10 (electric power measurement part 11) calculates a measurement time slot | zone from the measurement time matched with the read power consumption. Thereafter, the calculation unit 10 (power measurement unit 11) stores the obtained power consumption amount and the measurement time zone in the power amount storage unit 21 in association with each other.

  Note that the information stored in the power amount storage unit 21 by the power measurement unit 11 is, for example, the “power consumption” shown in FIG. 3.

  After execution of step S25, the calculation unit 10 (power measurement unit 11) determines whether or not the set period has elapsed, specifically, whether 24 hours have elapsed from the start of measurement in step S21, or the previous 24 It is determined by acquiring the measurement time memorize | stored in RAM whether 24 hours have passed since progress of time (step S26). When this step S26 is determined by Yes and the calculation unit 10 (power measurement unit 11) in step S22, specifically, the measurement time associated with the power consumption amount and stored in the power amount storage unit 21. It is also executed when the calculation unit 10 (power measurement unit 11) determines that the band is the measurement time zone stored in the cumulative time zone storage unit 26.

  When the calculation unit 10 (power measurement unit 11) determines in step S26 that the set period has not elapsed (step S26: No), the process returns to step S1.

  On the other hand, if the calculating part 10 (electric power measurement part 11) determines with the setting period having passed (step S26: Yes), it will transfer to step S27.

  In step S <b> 27, the calculation unit 10 (power amount abnormality determination unit 16) executes the following process. That is, the arithmetic unit 10 (power amount abnormality determination unit 16) compares the cumulative maximum value stored in the cumulative maximum value storage unit 25 with the power consumption stored in the power amount storage unit 21, and determines the cumulative maximum value. The power amount storage unit 21 is searched for a power consumption amount exceeding.

  Thereafter, the calculation unit 10 (power amount abnormality determination unit 16) determines whether or not a power consumption amount equal to or less than the accumulated maximum value has been searched (step S28). When it is determined that the power consumption below the cumulative maximum value cannot be searched, that is, when the measurement time zone indicating the power consumption below the cumulative maximum value is not stored in the power storage unit 21 (step S28: No). Since the calculation unit 10 (power amount abnormality determination unit 16) normally does not search for a time zone in which the power consumption amount is less than or equal to the accumulated maximum value within 24 hours, the resident is Since there is a possibility that the use of the electric device 100 cannot be stopped due to the impossibility, a screen for notifying the abnormality is displayed on the display unit 35 (step S31). Thereafter, the calculation unit 10 (power amount abnormality determination unit 16) ends the abnormality detection process.

  Note that the abnormality notification in step S31 is continued until an instruction to end the notification is given by the user via the input unit 34. In step S31, when a signal can be transmitted to an external device (for example, a computer installed in a security company) via the interface 36, a signal indicating an abnormality may be transmitted to the external device.

  As described above, in addition to the configuration in which the signal indicating abnormality is immediately sent to the external device when step S31 is executed, whether the signal indicating abnormality is transmitted to the external device when step S31 is executed. A screen that prompts selection of whether or not to be displayed may be displayed on the display unit 35, and when a signal transmission is instructed by an operation of the input unit 34 by the user, a signal indicating an abnormality may be transmitted to an external device. Furthermore, when the user does not need to transmit a signal by operating the input unit 34, the calculation unit 10 (power amount abnormality determination unit 16) corresponds to the time zone in order to reflect the resident's life pattern. The cumulative time zone to be deleted may be deleted from the cumulative time zone storage unit 26.

  On the other hand, when the power consumption amount equal to or less than the accumulated maximum value can be searched (step S28: Yes), the calculation unit 10 (power amount abnormality determination unit 16) stores the measurement time stored in association with the searched power consumption amount. A band is specified from the electric energy storage unit 21 and stored in the provisional time zone storage unit 24 (step S29).

  Thereafter, the calculation unit 10 (time zone abnormality determination unit 17) executes Step S30. That is, the calculation unit 10 (time zone abnormality determination unit 17) is a time zone excluding the measurement time zone stored in the provisional time zone storage unit 24, that is, a measurement time zone where the power consumption exceeds the accumulated maximum value, The cumulative time zone stored in the cumulative time zone storage unit 26 is compared. Then, the calculation unit 10 (time zone abnormality determination unit 17) includes (includes) the measurement time zone in which the power consumption exceeds the cumulative maximum value in the cumulative time zone stored in the cumulative time zone storage unit 26. It is determined whether or not (step S30).

  If the calculation unit 10 (time zone abnormality determination unit 17) determines that it is included (step S30: Yes), the calculation unit 10 (normally, the time zone abnormality determination unit 17), although it is a time zone where the power consumption exceeds the cumulative maximum value, Since the amount of power consumption is less than or equal to the maximum accumulated value during the time period, the resident is incapable of acting and may not be able to use the electric device 100, and step S31 is executed.

  Also during execution of step S31, as described above, a screen prompting the user to select whether or not to transmit a signal indicating abnormality to an external device is displayed on the display unit 35, and signal transmission is performed by the user operating the input unit 34. When an instruction is issued, a signal indicating an abnormality may be transmitted to an external device. Further, when a signal transmission unnecessary is instructed by the operation of the input unit 34 by the user, the calculation unit 10 (time zone abnormality determination unit 17) reflects the resident's life pattern. Among the time zones excluding the measurement time zone stored in, a measurement time zone that does not match the cumulative time zone stored in the cumulative time zone storage unit 26 may be stored in the cumulative time zone storage unit 26. .

  When the calculation unit 10 (time zone abnormality determination unit 17) determines that it is not included (step S30: No), the power consumption amount is accumulated as usual in the time zone where the power consumption amount exceeds the accumulated maximum value. Since it exceeds the maximum value, it is determined that there is no abnormality, and the abnormality detection process is terminated.

  As described above, the abnormality detection device 1 according to the embodiment compares the cumulative maximum value stored in the cumulative maximum value storage unit 25 with the power consumption amount stored in the power amount storage unit 21, and the cumulative maximum value. The power consumption storage unit 21 is searched for the following power consumption amount. At this time, if a power consumption amount that is less than or equal to the accumulated maximum value cannot be searched, the abnormality detection apparatus 1 is normally within 24 hours although there is a time zone in which the power consumption amount is less than or equal to the accumulated maximum value. Since this is not searched, it is determined that there is a possibility that the resident is unable to act and the use of the electric device 100 cannot be stopped.

  In addition, when the abnormality detection device 1 can search the power consumption storage unit 21 for a power consumption amount that is equal to or less than the accumulated maximum value, the abnormality detection device 1 specifies and specifies the measurement time zone stored in association with the searched power consumption amount. The measured time zone excluding the measured time zone, that is, the measured time zone in which the power consumption exceeds the accumulated maximum value is compared with the accumulated time zone stored in the accumulated time zone storage unit 26. Then, when the abnormality detection device 1 determines that the measurement time zone in which the power consumption exceeds the cumulative maximum value is included (included) in the cumulative time zone stored in the cumulative time zone storage unit 26, Even though it is a time zone where the power consumption exceeds the cumulative maximum value, the power consumption is below the cumulative maximum value during that time zone, so the resident becomes inoperable and the electrical equipment Since there is a possibility that 100 cannot be used, it is determined as abnormal.

  Here, the cumulative maximum value used in the abnormality detection apparatus 1 is the maximum power consumption when the resident is not using the electrical device 100 and the electrical device 100 that operates irregularly is not operating ( The provisional maximum value) is accumulated. Therefore, in the measurement time zone and the cumulative time zone where the power consumption exceeds the cumulative maximum value, the resident is not using the electrical device 100 and the electrical device 100 that operates irregularly is not operating. The time zone excluding the belt, that is, the time zone in which the resident uses the electrical device 100, the time zone in which the electrical device 100 that operates irregularly is operating, or the resident uses the electrical device 100 In addition, the electric device 100 that operates irregularly can also be a time zone in which the electric device 100 is operating. In this way, by specifying a time zone in which any electrical device 100 is used or operating, it is possible to accurately detect when the resident is not using the electrical device 100. As a result, it is possible to accurately detect that the power consumption is less than or equal to the cumulative maximum value during that time period, even though the power consumption usually exceeds the cumulative maximum value. Can do. Therefore, the abnormality detection device 1 can prevent erroneous detection of abnormality.

  In addition, the provisional time zone unit 13 newly specifies the accumulated time zone stored in the accumulated time zone storage unit 26 to be compared with the measurement time zone in which the power consumption exceeds the accumulated maximum value in the abnormality detection device 1. The provisional time zone (the provisional time zone newly stored in the provisional time zone storage unit 24) and the provisional time zone obtained by the provisional time zone unit 13 so far (already stored in the cumulative time zone storage unit 26) And the cumulative time zone). By obtaining the logical product in this way, the abnormality detection device 1 uses the accumulated time zone stored in the accumulated time zone storage unit 26 as the time zone in which only the electrical device 100 that operates irregularly or the electrical device is operating. In a time zone other than the time zone in which 100 is in a standby state, in other words, a time zone in which the resident is using the electrical device 100, and a resident is using the electrical device 100, and irregularly It is also possible to set the time period during which the electric device 100 that operates at a time is also operating. Therefore, the abnormality detection device 1 is that the power consumption amount is less than or equal to the cumulative maximum value during the time zone, even though it is usually a time zone where the power consumption amount exceeds the cumulative maximum value. It can be detected with high accuracy. Therefore, the abnormality detection device 1 can prevent erroneous detection of abnormality.

  Further, the cumulative maximum value used in the abnormality detection apparatus 1 is the largest provisional maximum value among the provisional maximum values obtained by the provisional maximum value unit 12 during the 30 days that are the accumulation period, and is used in the abnormality detection apparatus 1. The accumulated time zone is a measurement time zone specified by the provisional time zone 13 even once every 30 days. That is, the cumulative maximum value and the cumulative time zone reflect the fluctuations for 30 days. As a result, even if an electric device (for example, a refrigerator, a toilet seat with a heater, etc.) whose power consumption varies irregularly because it operates irregularly, these power consumption fluctuations are accumulated maximum. The value and the accumulated time zone can be reflected. Therefore, the abnormality detection device 1 prevents the occurrence of a deviation between the specified accumulated time period and the usage pattern of the electric device by the resident even if the electric device that operates irregularly is used indoors. Also, it is possible to prevent erroneous detection of abnormalities.

(Embodiment 2)
Next, the abnormality detection device 2 according to Embodiment 2 of the present invention will be described with reference to FIGS. The abnormality detection device 2 is obtained by changing a part of the configuration and processing of the abnormality detection device 1 according to the first embodiment. Therefore, in the abnormality detection device 2, the same configurations and the same operations (processes) as those of the abnormality detection device 1 are denoted by the same reference numerals, and description thereof is omitted.

  In the abnormality detection device 2, the cumulative time zone portion 15 realized by the calculation unit 10 of the abnormality detection device 1 is removed, and the cumulative frequency unit 18 is realized by the calculation unit 10.

  The cumulative frequency unit 18 updates the frequency for each measurement time stored in the cumulative frequency storage unit 27. The frequency for each measurement time stored in the cumulative frequency storage unit 27 is the frequency during which the measurement time zone is stored in the provisional time zone storage unit 24 within 30 days from the start of measurement, that is, the measurement. The frequency indicating the amount of power consumption that is less than or equal to the provisional maximum value is recorded for each measurement time.

  Specifically, the frequency for each measurement time stored in the cumulative frequency storage unit 27 is as shown in FIG. The frequency is a natural number from 0 to 1. The larger the frequency value, the higher the frequency indicating the power consumption below the provisional maximum value. In addition, the measurement time slot | zone shown to Fig.8 (a) respond | corresponds to all the time slots (refer FIG. 3) memorize | stored in the electric energy storage part 21. FIG.

  The frequency for each measurement time stored in the cumulative frequency storage unit 27 is updated by the cumulative frequency unit 18 as follows. That is, the cumulative frequency unit 18 determines the frequency for each measurement time already stored in the cumulative frequency storage unit 27 and the set period (24 hours from the start of measurement by the power measurement unit 11 or 24 hours after the previous 24 hours have passed). 24 hours after the time has passed), the measurement time zone stored in the provisional time zone storage unit 24, and the update formula shown in FIG. Update the frequency for each measurement time.

  Specifically, the cumulative frequency unit 18 obtains the frequency in an arbitrary time zone (for example, one time zone) already stored in the cumulative frequency storage unit 27, and updates this as shown in FIG. Substitute for “frequency in measurement time zone before update” in the equation.

  In addition, the cumulative frequency unit 18 specifies the number of times that the set period is satisfied from the number of sets of measurement data stored in the RAM as a set, and the number of times is set to “the number of times set in the set period” in the update formula. Assign to A ”.

  In addition, the cumulative frequency unit 18 acquires the measurement time zone (measurement time zone indicating the amount of power consumption that is less than or equal to the provisional maximum value) stored in the provisional time zone storage unit 24 and has already acquired from the cumulative frequency storage unit 27. It is determined whether or not a measurement time zone that coincides with a time zone (for example, 0 hour and 1 minute zone) corresponding to the frequency being stored is stored in the provisional time zone storage unit 24. Then, the cumulative frequency unit 18 substitutes “1” for “binary B” in the update formula if the matching time zone is stored, and updates the update formula if the matching time zone is not stored. “0 (zero)” is assigned to a certain “binary B”.

  In this way, the cumulative frequency unit 18 calculates “frequency in the updated measurement time zone” in the update formula in all the time zones stored in the electric energy storage unit 21, and accumulates the calculated frequencies. The frequency is stored in the frequency storage unit 27 and the frequency is updated.

  In the abnormality detection device 2 shown in FIG. 7, the cumulative time zone storage unit 26 that was in the storage unit 20 of the abnormality detection device 1 is removed, and a cumulative frequency storage unit 27 and a number counter 28 are added.

  As described above, the cumulative frequency storage unit 27 stores the frequency (see FIG. 8A) in the updated measurement time zone calculated by the cumulative frequency unit 18.

  The number counter 28 stores the number of times that the power consumption has become equal to or less than the provisional maximum value for every time period stored in the power amount storage unit 21. Specifically, as shown in FIG. 8C, the number counter 28 stores a counter that stores the number of times that the power consumption amount is equal to or less than the provisional maximum value for all the times stored in the power amount storage unit 21. We prepare for every belt. Here, the count value shown in FIG. 8C corresponds to the number of times the power consumption amount has become the provisional maximum value or less, and the measurement time zone shown in FIG. 8C is stored in the power amount storage unit 21. It corresponds to all the time zones.

  The time counter 28 counts up by the time zone abnormality determination unit 17.

  The time zone abnormality determination unit 17 acquires a time zone in which the power consumption is less than or equal to the provisional maximum value from the provisional time zone storage unit 24, and counts up one counter corresponding to the obtained time zone. On the other hand, the time zone abnormality determination unit 17 does not count up a counter corresponding to a time zone that is not stored in the provisional time zone storage unit 24.

  In addition, the time zone abnormality determination unit 17 has a frequency for each measurement time zone stored in the cumulative frequency storage unit 27 (see FIG. 8A) and a count value for each measurement time stored in the number counter 28 (see FIG. 8). 8 (c)) is substituted for the determination formula shown in FIG. 8D for every time period stored in the electric energy storage unit 21 to determine whether or not an abnormality has occurred. The determination value S to be used is obtained every measurement time. And the time slot | zone abnormality determination part 17 determines whether it is abnormal by the presence or absence of even one time slot | zone when the determination value S becomes below a predetermined threshold value.

  Here, as shown in the determination formula shown in FIG. 8D, the determination value S is based on the frequency in the measurement time zone stored in the cumulative frequency storage unit 27, and the measurement time zone stored in the number counter 28. It is calculated | required by the function which uses the count value in as an index | exponent. For this reason, even if the count value in the measurement time zone is the same as the determination value S, the smaller the frequency in the measurement time zone, the smaller the required value. In other words, the determination value S becomes lower than the threshold value even if the count value is smaller as the frequency in the measurement time period becomes smaller (lower as the frequency indicating the power consumption less than the provisional maximum value becomes lower). Designed to. Thereby, the time slot | zone abnormality determination part 17 can make the determination value S below a threshold value with a smaller count value, so that the frequency in a measurement time slot | zone is small. Therefore, although it is usually a time zone where the amount of power consumption exceeds the cumulative maximum value in normal cases (although it is rarely a time zone where the power consumption is below the cumulative maximum value in normal cases), it is cumulative Anomalies that are below the maximum value can be detected with a small number of occurrences. Therefore, the abnormality detection device 2 can detect the possibility that the resident is unable to act and cannot use the electric device 100 earlier than the case where the determination value S is not used.

  The accumulation process executed by the abnormality detection device 2 described above will be described with reference to FIG. In addition, the accumulation process performed by the abnormality detection apparatus 2 changes step S8 of the accumulation process performed by the abnormality detection apparatus 1 of Embodiment 1 to step S42, and performs step S10 performed by the abnormality detection apparatus 1. This is a change to step S41. Therefore, the same processes as those of the abnormality detection apparatus 1 are denoted by the same reference numerals and the description thereof is omitted.

  After execution of step S7, the calculation unit 10 (provisional time zone unit 13) executes step S41. That is, the calculation unit 10 (provisional time zone unit 13) reads the provisional maximum value stored in the provisional maximum value storage unit 23, and uses the read provisional maximum value as a reference to calculate the power consumption that is equal to or less than the accumulated maximum value. The search is made from the power consumption stored in the power storage unit 21. Then, the calculation unit 10 (provisional time zone unit 13) reads the measurement time zone associated with the searched power consumption amount from the power amount storage unit 21. Thereby, the calculating part 10 (provisional time slot | zone part 13) specifies the measurement time slot | zone which shows the power consumption amount which becomes below a temporary maximum value. That is, the calculation unit 10 (provisional time zone unit 13) specifies a time zone during which the resident is not using the electrical device 100.

  Then, the calculating part 10 performs step S9. After execution of step S9, the calculation unit 10 (cumulative frequency unit 18) stores the frequency for each measurement time already stored in the cumulative frequency storage unit 27, the number of times that the set period has been satisfied, and the provisional time zone storage unit 24. The frequency for every measurement time memorize | stored in the accumulation frequency memory | storage part 27 is updated from the memorize | stored measurement time slot | zone and the update type shown in FIG.8 (b) (step S42).

  Specifically, the calculation unit 10 (cumulative frequency unit 18) performs the following process in step S42. That is, the calculation unit 10 (cumulative frequency unit 18) acquires the frequency in an arbitrary time zone (for example, 0:01) that is already stored in the cumulative frequency storage unit 27, and this is in the update formula. Substituted in “Frequency in measurement time zone before update (see FIG. 8B)”. In addition, the calculation unit 10 (cumulative frequency unit 18) specifies the number of times the set period is satisfied from the number of sets of measurement data stored in the RAM as a set, and the number of times is set in the “setting” in the update formula. It is substituted for the number of times A (see FIG. 8B). The computing unit 10 (cumulative frequency unit 18) acquires the measurement time zone stored in the provisional time zone storage unit 24, and the time zone (for example, 1 o'clock) corresponding to the frequency acquired from the cumulative frequency storage unit 27. It is determined whether or not the measurement time zone that coincides with the zone is stored in the provisional time zone storage unit 24. Then, the calculation unit 10 (cumulative frequency unit 18) substitutes “1” into “binary B (see FIG. 8B)” in the update formula if the matching time zone is stored, and matches If no time zone is stored, “0 (zero)” is substituted for “binary B” in the update formula. The calculation unit 10 (cumulative frequency unit 18) repeats this for all the time zones stored in the electric energy storage unit 21, so that the “frequency in the measurement time zone after update (FIG. 8 (b) ))) Is calculated. Thereafter, the calculation unit 10 (cumulative frequency unit 18) stores the frequency in the updated measurement time zone in the cumulative frequency storage unit 27.

  After the execution of step S10, the arithmetic unit 10 (CPU) executes the determination of step S11 and determines that the cumulative period has elapsed, that is, determines that 30 days have elapsed since the start of measurement (step S11: Yes), the accumulation process is terminated.

  Next, the abnormality detection process executed by the above-described abnormality detection device 2 will be described with reference to FIG. Note that the abnormality detection process executed by the abnormality detection device 2 does not execute steps S21, S22 and S30 of the abnormality detection processing executed by the abnormality detection device 1 of the first embodiment, but performs steps S51 and S52. Is added. Therefore, the same processes as those of the abnormality detection apparatus 1 are denoted by the same reference numerals and the description thereof is omitted.

  After execution of step S29, the calculation unit 10 (time zone abnormality determination unit 17) executes step S51. That is, the calculation unit 10 (time zone abnormality determination unit 17) acquires a time zone in which the power consumption is equal to or less than the provisional maximum value from the provisional time zone storage unit 24, and sets one counter corresponding to the obtained time zone. Count up. On the other hand, the calculation unit 10 (time zone abnormality determination unit 17) does not count up a counter corresponding to a time zone that is not stored in the provisional time zone storage unit 24.

  Thereafter, the calculation unit 10 (time zone abnormality determination unit 17) executes Step S52. That is, the calculation unit 10 (time zone abnormality determination unit 17) sets the frequency for each measurement time zone (see FIG. 8A) stored in the cumulative frequency storage unit 27 and the measurement time stored in the number counter 28. Whether or not an abnormality has occurred by substituting the count value (see FIG. 8C) into the determination formula shown in FIG. 8D for every time period stored in the electric energy storage unit 21. A determination value S used for the determination is obtained for each measurement time. And the calculating part 10 (time slot | zone abnormality determination part 17) determines whether it is abnormal by the presence or absence of one time slot | zone when the determination value S becomes below a predetermined threshold value.

  When the calculation unit 10 (time zone abnormality determination unit 17) determines that the determination value S exceeds the threshold value in all time zones (step S52: No), the abnormality detection process is terminated because there is no abnormality.

  On the other hand, when the calculation unit 10 (time zone abnormality determination unit 17) determines that there is at least one time zone in which the determination value S is equal to or less than the threshold value (step S52: Yes), the power consumption that exceeds the cumulative maximum value is normal. Despite being often the amount of time zone (although it is usually less than the cumulative maximum value), the resident As a result, it is assumed that there is a possibility that the electric device 100 cannot be used, and step S31 is executed, and the abnormality detection process is terminated.

  Here, as described above, the determination value S obtained by the calculation unit 10 (time zone abnormality determination unit 17) decreases as the frequency in the measurement time zone decreases (the frequency indicating the power consumption amount below the provisional maximum value decreases). The smaller the count value, the lower the threshold value (see FIG. 8D). Thereby, the calculating part 10 (time slot | zone abnormality determination part 17) can make determination value S below a threshold value with a smaller count value, so that the frequency in a measurement time slot | zone is small. Therefore, although it is usually a time zone where the amount of power consumption exceeds the cumulative maximum value in normal cases (although it is rarely a time zone where the power consumption is below the cumulative maximum value in normal cases), it is cumulative It can be detected with a small number of occurrences that it is below the maximum value. Therefore, the abnormality detection device 2 can detect the possibility that the resident is unable to act and cannot use the electric device 100 earlier than the case where the determination value S is not used.

  Further, similarly to the abnormality detection device 1 of the first embodiment, the provisional maximum value unit 12 is the largest provisional maximum value among the provisional maximum values obtained in 30 days, which is the accumulation period, and is used in the abnormality detection device 2. The cumulative time zone is a measurement time zone specified by the provisional time zone 13 even once every 30 days. That is, the cumulative maximum value and the cumulative time zone reflect the fluctuations for 30 days. As a result, even if an electric device (for example, a refrigerator, a toilet seat with a heater, etc.) whose power consumption varies irregularly because it operates irregularly, these power consumption fluctuations are accumulated maximum. The value and the accumulated time zone can be reflected. Therefore, the abnormality detection device 2 prevents the occurrence of a deviation between the specified accumulated time period and the usage pattern of the electric device by the resident even if the electric device that operates irregularly is used indoors. , It can prevent erroneous detection of abnormalities.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to said embodiment, A various deformation | transformation and application are possible.

  For example, in each of the above-described embodiments, 24 hours (one day) is set as the set period and 30 days is set as the cumulative period, but the present invention is not limited to this. That is, the setting period and the accumulation period may be arbitrarily set within a range where the accumulation period is equal to or greater than the set period. In this case, as a matter of course, it is necessary to shorten the repetition period of power measurement by the power measurement unit 11 (1 minute in each embodiment) than the set period.

  Moreover, in each embodiment mentioned above, although the fluctuation | variation for 30 days which is an accumulation period was reflected in the accumulation maximum value and the accumulation time slot | zone, it is not restricted to this. That is, the fluctuation for 30 days, which is the accumulation period, may be classified for each day of the week, and the accumulated maximum value and the accumulated time zone may be provided for each day of the week. In this case, if the calendar is provided in the calculation unit 21, the storage units 21 to 26 are provided for each day of the week, and the storage units 21 to 26 to be used are changed according to the day of the week on which the accumulation process is executed. Good. And what is necessary is just to set it as the structure which changes use of the accumulation maximum value memory | storage part 25 and the accumulation time zone memory | storage part 26 which were provided for every day of the week according to the day of the week which performs abnormality detection processing. According to this configuration, fluctuations for each day of the week can be reflected in the accumulated maximum value and the accumulated time zone.

  Further, in each of the above-described embodiments, the abnormality detection process is started when an operation of the input unit 34 is performed by a user instructing execution, and is repeatedly executed every predetermined time (for example, every 30 minutes). However, it is not limited to this. That is, when there is a high possibility that the resident is absent, the execution of the abnormality detection process may be stopped. In this case, it can be realized with the following configuration. That is, when an entrance lamp arranged outdoors is turned on, a coil that receives a high-frequency component radiated from the entrance lamp is arranged around the entrance lamp. And the abnormality detection apparatuses 1 and 2 should just be set as the structure which stops execution of an abnormality detection process during the period when the high frequency component is received by the coil. According to this configuration, it is possible to prevent waste power from being used in the abnormality detection devices 1 and 2 by executing the abnormality detection process even though there is a high possibility that the resident is absent.

  In the first embodiment, the provisional time zone unit 13 of the abnormality detection apparatus 1 specifies the measurement time zone indicating the power consumption exceeding the provisional maximum value. However, the present invention is not limited to this. That is, unlike the abnormality detection device 1 of the first embodiment, both the measurement time zone stored in the provisional time zone storage unit 24 and the cumulative time zone stored in the cumulative time zone storage unit 26 are simply In the case of configuring a device that displays a screen for notifying abnormality on the display unit 35 when they do not match, contrary to the case of the first embodiment, the provisional time zone unit 13 is equal to or less than the provisional maximum value. You may specify the measurement time slot | zone which shows power consumption. In this case, step S8 (see FIG. 5) is changed to “specify a measurement time zone indicating power consumption equal to or lower than the provisional maximum value and store it as a provisional time zone in the provisional time zone storage unit”. 6) may be changed to “Is the measured time zone stored in the provisional time zone storage unit consistent with the accumulated time?”.

  In addition, as described above, when both the measurement time zone stored in the provisional time zone storage unit 24 and the cumulative time zone stored in the cumulative time zone storage unit 26 do not match, the display unit In the case of configuring a device that displays a screen for notifying an abnormality in 35, if the provisional time zone unit 13 specifies a measurement time zone that indicates power consumption exceeding the provisional maximum value, as in the first embodiment. The following processing may be performed before determining whether or not both time zones match. That is, the power amount abnormality determination unit 16 determines whether or not a time zone excluding the measurement time zone stored in the provisional time zone storage unit 24, that is, a measurement time zone in which the power consumption exceeds the accumulated maximum value has been searched. If it is determined that the power consumption exceeding the cumulative maximum value cannot be searched, it is not searched even though there is usually a time zone in which the power consumption exceeds the cumulative maximum value is within 24 hours. Therefore, a screen may be displayed on the display unit 35 for notifying that there is a possibility that the resident has become unable to act and cannot start using the electric device 100.

  In the above embodiment, the program for controlling the abnormality detection devices 1 and 2 is a flexible disk, a CD-ROM (Compact Disc Read-Only Memory), a DVD (Digital Versatile Disc), an MO (Magneto-Optical Disc), or the like. An abnormality detection apparatus that executes the processing shown in FIGS. 5 to 6 and FIGS. 9 to 10 by storing the program in a computer-readable recording medium and distributing the program and installing the program in the computer or the like is configured. It is good.

  Further, the above-described program may be stored in a disk device or the like of a predetermined server device on a communication network such as the Internet, and may be downloaded, for example, superimposed on a carrier wave.

  Also, when the processing shown in FIGS. 5 to 6 and FIGS. 9 to 10 is realized by sharing each OS (Operating System), or when the processing is realized by cooperation between the OS and the application, etc. Only the part other than the OS may be stored and distributed in a medium, or may be downloaded.

  Various embodiments and modifications can be made to the present invention without departing from the broad spirit and scope of the present invention. Further, the above-described embodiment is for explaining the present invention, and does not limit the scope of the present invention. In other words, the scope of the present invention is indicated by the scope of claims, not the embodiment described above. Various modifications within the scope of the claims and within the scope of the equivalent invention are considered to be within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1, 2 Abnormality detection apparatus 10 Calculation part 11 Electric power measurement part 12 Temporary maximum value part 13 Temporary time zone part 14 Cumulative maximum value part 15 Cumulative time zone part 16 Power amount abnormality determination part 17 Time zone abnormality determination part 18 Cumulative frequency part 20 Storage unit 21 Electric energy storage unit 22 Maximum value storage unit 23 Provisional maximum value storage unit 24 Provisional time zone storage unit 25 Cumulative maximum value storage unit 26 Cumulative time zone storage unit 27 Cumulative frequency storage unit 28 Number counter 31 PT sensor 32 CT sensor 33 A / D converter 34 Input section 35 Display section 36 Interface 60 Indoor supply line 70 Distribution board 80 Indoor wiring 90 Outlet 100 Electrical equipment

Claims (11)

A power measurement storage unit that periodically measures the power consumption of the target electrical device and stores the measured power consumption in association with information for specifying the measurement timing;
Obtaining a power consumption amount for each time zone of the target electrical equipment, and a time zone measurement storage unit for storing the obtained power consumption amount and the time zone in association with each other;
A minimum value time zone specifying unit that executes a process for specifying a time zone in which the power consumption for each time zone obtained by the time zone measurement storage unit indicates a minimum value;
A maximum specifying unit that specifies a maximum one of the power consumptions belonging to the measurement timing in the time zone specified by the minimum value time zone specifying unit from the power consumptions stored in the power measurement storage unit;
A maximum storage unit for storing the largest one of the power consumption specified by the maximum specifying unit;
The reference value determined based on the power consumption stored in the maximum storage unit and the power consumption stored in the time zone measurement storage unit are compared for each time zone, and the power consumption exceeds the reference value. A time zone specifying unit for specifying the associated time zone;
A time zone storage unit for storing the time zone specified by the time zone specifying unit;
When the power consumption measured by the power measurement storage unit is newly stored in the power measurement storage unit and a time zone is newly specified by the time zone specifying unit, the newly specified time zone and the time zone The time zone stored in the storage unit is compared with the time zone previously specified by the time zone specifying unit, and when the specified time zone is included in the stored time zone, it is determined as abnormal. A determination unit;
An abnormality detection device comprising: Each time the time zone is specified by the time zone specifying unit, the specified time zone is stored in the time zone storage unit while holding the time zone already stored in the time zone storage unit, and stored. A time zone update unit for updating the contents,
An execution unit for executing the update by the time zone update unit during a predetermined cumulative period,
After the execution by the execution unit is completed, the determination unit newly stores the power consumption measured by the power measurement storage unit in the power measurement storage unit, and the time zone specifying unit newly specifies a time zone. And the newly specified time zone and the time zone stored in the time zone storage unit and compared with the time zone previously specified by the time zone specifying unit, and the specified time zone is stored When it is included in the time zone, it is judged as abnormal.
The abnormality detection device according to claim 1. The time zone update unit obtains the logical product of the specified time zone and the time zone already stored in the time zone storage unit, and obtains the time zone, each time the time zone is specified by the time zone specifying unit. Storing the logical product in the time zone storage unit and updating the storage content;
The abnormality detection device according to claim 2. The power consumption specified by the maximum specifying unit is compared with the power consumption stored in the maximum storage unit, and the power consumption specified by the maximum specifying unit is greater than the power consumption stored in the maximum storage unit. A maximum update unit for storing the power consumption specified by the maximum specifying unit in the maximum storage unit and updating the storage content of the maximum storage unit,
In addition to the update by the time zone update unit, the execution unit causes the update by the maximum update unit to be executed during a predetermined accumulation period.
The abnormality detection device according to claim 2 or 3. The determination unit
After completion of execution by the execution unit, the time zone specifying unit also determines that an abnormality occurs even if a time zone that indicates power consumption exceeding a reference value is not specified.
The abnormality detection device according to claim 4. A power measurement storage unit that periodically measures the power consumption of the target electrical device and stores the measured power consumption in association with information for specifying the measurement timing;
Obtaining a power consumption amount for each time zone of the target electrical equipment, and a time zone measurement storage unit for storing the obtained power consumption amount and the time zone in association with each other;
A minimum value time zone specifying unit that executes a process for specifying a time zone in which the power consumption for each time zone obtained by the time zone measurement storage unit indicates a minimum value;
A maximum specifying unit that specifies a maximum one of the power consumptions belonging to the measurement timing in the time zone specified by the minimum value time zone specifying unit from the power consumptions stored in the power measurement storage unit;
A maximum storage unit for storing the largest one of the power consumption specified by the maximum specification unit;
The reference value determined based on the power consumption stored in the maximum storage unit and the power consumption stored in the time zone measurement storage unit are compared for each time zone, and the power consumption is equal to or less than the reference value. A time zone identifying unit that identifies the time zone associated with
An execution unit for executing the specification by the time zone specifying unit during a predetermined accumulation period;
From the number of times the time zone is specified by the time zone specifying unit and the cumulative period, a frequency unit for obtaining a frequency indicating a power consumption amount equal to or less than a reference value for each time zone,
After completion of execution by the execution unit, the measured power consumption is stored in the power measurement storage unit, and when the time zone is specified by the time zone specifying unit, the number of times storage unit that stores the specified number of times for each time zone When,
A determination unit that determines a value calculated for each time zone by using the frequency determined by the frequency unit as a radix and the number of times stored in the frequency storage unit as an index, and determines that the value is equal to or less than a threshold. When,
An abnormality detection device comprising: The power consumption specified by the maximum specifying unit is compared with the power consumption stored in the maximum storage unit, and the power consumption specified by the maximum specifying unit is greater than the power consumption stored in the maximum storage unit. A maximum update unit for storing the power consumption specified by the maximum specifying unit in the maximum storage unit and updating the storage content of the maximum storage unit,
The execution unit is configured to execute the update by the maximum update unit during a predetermined accumulation period in addition to the specification by the time zone specifying unit.
The abnormality detection device according to claim 6. An abnormality detection device for detecting an abnormality regularly measures the power consumption of the target electrical device, and stores the measured power consumption in association with information specifying the measurement timing; and
The abnormality detection device obtains the power consumption for each time zone of the target electric device, and stores the calculated power consumption and the time zone in association with each other,
A minimum value time zone specifying step in which the abnormality detection device executes a process of specifying a time zone in which the power consumption for each time zone obtained by the time zone measurement storage step shows a minimum value; ,
The abnormality detection device specifies the largest one of the power consumptions belonging to the measurement timing in the time zone specified by the minimum value time zone specification step from the power consumptions stored in the power measurement storage step. Maximum specific steps to
A maximum storage step in which the abnormality detection device stores the largest one of the power consumption specified by the maximum specification step;
The abnormality detection device compares the reference value determined based on the power consumption stored in the maximum storage step with the power consumption amount stored in the time zone measurement storage step for each time zone, and the reference value A time zone identifying step for identifying a time zone associated with power consumption exceeding
A time zone storing step in which the abnormality detecting device stores the time zone specified by the time zone specifying step;
When the abnormality detection device newly stores the power consumption measured by the power measurement storage step and the time zone is newly specified by the time zone specification step, the newly specified time zone and the time zone The time zone stored by the storing step is compared with the time zone previously specified by the time zone specifying step, and when the specified time zone is included in the stored time zone, it is determined as abnormal. A determination step;
An abnormality detection method comprising: An abnormality detection device for detecting an abnormality regularly measures the power consumption of the target electrical device, and stores the measured power consumption in association with information specifying the measurement timing; and
The abnormality detection device obtains the power consumption for each time zone of the target electric device, and stores the calculated power consumption and the time zone in association with each other,
A minimum value time zone specifying step in which the abnormality detection device executes a process of specifying a time zone in which the power consumption for each time zone obtained by the time zone measurement storage step shows a minimum value; ,
The abnormality detection device specifies the largest one of the power consumptions belonging to the measurement timing in the time zone specified by the minimum value time zone specification step from the power consumptions stored in the power measurement storage step. Maximum specific steps to
A maximum storage step in which the abnormality detection device stores the largest one of the power consumption specified by the maximum specification step;
The abnormality detection device compares the reference value determined based on the power consumption stored in the maximum storage step with the power consumption amount stored in the time zone measurement storage step for each time zone, and the reference value A time zone specifying step for specifying a time zone associated with the following power consumption amount;
An execution step in which the abnormality detection device executes the identification by the time zone identification step during a predetermined cumulative period;
A frequency step for determining, for each time zone, a frequency indicating an amount of power consumption that is equal to or less than a reference value, from the number of times the time zone is specified by the time zone specifying step and the cumulative period;
After the completion of execution by the execution step, the abnormality detection device stores the power consumption measured by the power measurement storage step, and when the time zone is specified by the time zone specification step, the specified number of times is set to the time zone. A step of storing the number of times for each storage;
When the abnormality detection device determines a value calculated for each time zone using the frequency obtained by the frequency step as a radix and the number of times stored by the number of times storage step as an index, and the obtained value is equal to or less than a threshold value, A determination step for determining an abnormality;
An abnormality detection method comprising: In the computer that controls the abnormality detection device that detects abnormality,
A power measurement storage function for periodically measuring the power consumption of the target electrical device and storing the measured power consumption in association with information for specifying the measurement timing;
A time zone measurement storage function for obtaining power consumption amount for each time zone of the target electric device and storing the obtained power consumption amount and the time zone in association with each other,
Minimum value time zone specifying function for executing a process for specifying a time zone in which the power consumption for each time zone obtained by the time zone measurement storage function shows a minimum value, every predetermined period of time,
A maximum specifying function for specifying a maximum one of the power consumptions belonging to the measurement timing in the time zone specified by the minimum value time zone specifying function from the power consumptions stored in the power measurement storage function;
A maximum storage function for storing the largest one of the power consumption specified by the maximum specification function;
The reference value determined based on the power consumption stored by the maximum storage function and the power consumption stored by the time zone measurement storage function are compared for each time zone, and the power consumption exceeds the reference value. Time zone identification function that identifies the associated time zone,
A time zone storage function for storing the time zone specified by the time zone specifying function;
The power consumption measured by the power measurement storage function is newly stored, and when the time zone is newly specified by the time zone specification function, the newly specified time zone and the time zone storage function are stored. A time zone and a determination function for comparing with a time zone previously specified by the time zone specifying function and determining that an abnormality occurs when the specified time zone is included in the stored time zone;
A program that realizes In the computer that controls the abnormality detection device that detects abnormality,
A power measurement storage function for periodically measuring the power consumption of the target electrical device and storing the measured power consumption in association with information for specifying the measurement timing;
A time zone measurement storage function for obtaining power consumption amount for each time zone of the target electric device and storing the obtained power consumption amount and the time zone in association with each other,
Minimum value time zone specifying function for executing a process for specifying a time zone in which the power consumption for each time zone obtained by the time zone measurement storage function shows a minimum value, every predetermined period of time,
A maximum specifying function for specifying a maximum one of the power consumptions belonging to the measurement timing in the time zone specified by the minimum value time zone specifying function from the power consumptions stored in the power measurement storage function;
A maximum storage function for storing the largest one of the power consumption specified by the maximum specification function;
The reference value determined based on the power consumption stored by the maximum storage function and the power consumption stored by the time zone measurement storage function are compared for each time zone, and the power consumption is equal to or less than the reference value. A time zone identification function that identifies the time zone associated with
An execution function for executing the specification by the time zone specifying function during a predetermined cumulative period;
A frequency function for determining, for each time zone, a frequency indicating a power consumption amount equal to or less than a reference value from the number of times the time zone is specified by the time zone specifying function and the cumulative period.
After the execution by the execution function is completed, the power consumption measured by the measurement storage function is stored, and when the time zone is specified by the time zone specifying function, the number of times storage function for storing the specified number of times for each time zone ,
A determination function for determining a value calculated for each time zone by using the frequency determined by the frequency function as a radix and using the number of times stored by the frequency storage function as an index, and determining that the calculated value is equal to or less than a threshold value. ,
A program that realizes

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