JP5851966B2 - Human activity detection method and human activity detection system - Google Patents

Description

  The present invention relates to a human activity detection method and a human activity detection system related to watching.

  In recent years, with the increase in the number of elderly residents living alone in a home, a system has been developed for watching the living situation including the safety confirmation of elderly residents. There is also a system that determines the presence or absence of a resident's activity based on the power consumed by electrical equipment used by an elderly resident living alone.

  The technique described in Non-Patent Document 1 provides a threshold for the cumulative frequency distribution of the total load current change, and there is resident activity when the cumulative frequency distribution of the total load current change is larger than the threshold. It is a system that determines that there is no resident activity when it is small. However, since parameters such as a threshold for determining whether or not an electric device is operated by a resident have been manually changed for each home and every season when the electric device to be used is changed, the operation of the system is troublesome.

  The technique described in Non-Patent Document 2 is a system using an algorithm developed to automatically set parameters such as a threshold value from measurement data. The automated system has greatly reduced the time and effort required to operate the system, making it possible to efficiently monitor many elderly people living alone.

Central Research Institute of Electric Power Industry, “The Central Research Institute of Electric Power Industry Report: A System for Watching Elderly Living Alone from the Use of Electricity (Part 2)-Method Using Cumulative Frequency Distribution of Changes in Total Load Current-” Research Report: R05013, June 2006 Moon Central Research Institute of Electric Power Industry, “Report of Central Research Institute for Electric Power Industry: Practical use of the system for watching elderly people living alone — Demonstration test in Sabae City” Report number: R09014, May 2010

  However, the conventional techniques such as Non-Patent Document 1 and Non-Patent Document 2 have the following problems.

  FIG. 1 shows the relationship between time and power when a power threshold is provided in the prior art for determining whether a resident is active or not in the house. The technology described in Non-Patent Document 1 and Non-Patent Document 2 sets a threshold value for the magnitude of electric power (current), and there is no human activity when the current electric power is smaller than the threshold value (A), and human activity when the electric power is large It is determined that there is (B). Based on the determination methods of Non-Patent Document 1 and Non-Patent Document 2, the technologies of Non-Patent Document 1 and Non-Patent Document 2 are based on the assumption that a resident is using some kind of electrical appliance when working in the house. It can be said. However, in reality, it is possible to go out without turning off the power of the air-conditioning equipment, or to use the electrical appliance in the absence by using the timer function.

  FIG. 2 shows the relationship between the time and power when the resident goes out without turning off the power of the air conditioning equipment in the prior art (C). FIG. 3 shows the relationship between time and power in the case where the resident uses the timer function in the related art to use the electrical appliance in the absence (D). In the case of FIG. 2, FIG. 3, etc., there is a possibility that it is erroneously determined that there is human activity even though it is actually absent in the conventional techniques including Non-Patent Document 1 and Non-Patent Document 2. E in 2, F in FIG.

  A state in which the current power is determined to be larger than the threshold by the method according to the prior art is a state in which there is a high possibility that a resident is active in the house. However, for example, there is a problem that the active state is erroneously determined even when the user is absent, such as when going out without turning off the power of the air conditioning equipment. On the other hand, since the steep rise of electric power of a certain magnitude or more is often caused by human operations such as cooking utensils and dryers, it is highly related to human activities. However, if only the method described in Non-Patent Document 1 and Non-Patent Document 2 is used, if the resident uses the timer function of the electrical appliance and goes out, the electrical power of the electrical appliance is used when the resident is absent, and the system mistakenly has resident activity. There was a problem of judging.

  The present invention has been made in view of such problems, and the purpose of the present invention is to detect the activities of residents in the house only when the power is larger than the power threshold and there is a sharp rise in power. For example, when going out without turning off the power of the air conditioning equipment, or when using electrical appliances in the absence by using the timer function, the frequency that the system misjudged that there is human activity It is an object of the present invention to provide a method and system in which the accuracy of determining the activity of a resident in a home is improved.

  In order to achieve such an object, the present invention provides a resident activity detection system in which a power value measured by a power meter is input, and the resident is a resident at a first time (t). A method for determining whether or not there is an activity, wherein from the first time (t), the power continuation time is traced back more than a threshold preset in the storage unit of the resident activity detection system, A first step of determining whether or not the power value measured by the wattmeter continuously exceeds a power threshold preset in the storage unit; and a rise time (Δt) preset in the storage unit The first power value (P (t)) at the first time (t) and the second power value at the second time (t−Δt) (P ( t−Δt)) exceeds the rising power value preset in the storage unit. The second step of determining that there is a rising peak, and the power value measured in the first step continues to exceed the power threshold, and the rising peak is in the second step. When it is determined, the resident activity detection system includes a third step of determining that there is a resident activity.

The invention described in claim 2 is a method for determining whether or not there is a resident's activity at the third time (t) in the resident activity detection system in which the power value measured by the power meter is input. From the third time (t ′), the power value measured by the wattmeter is traced back more than a preset threshold value in the storage unit of the resident activity detection system, Among the measured power values between the fourth step for determining whether or not the power threshold value preset in advance is continuously exceeded and the rise time (Δt ₁ ) preset in the storage unit Of the third power value (P (t ′)) at the third time (t ′) and the fourth power value (P (t′−Δt ₁ )) at the fourth time (t′−Δt ₁ ). When the difference exceeds the value of the rising power set in advance in the storage unit, if there is a rising peak A fifth step of constant, the time power value exceeds the rising power value is continuously maintained a substantially equal or more power values (Delta] t ₂₎ is preset rising power continuously in the storage unit A sixth time (t ′ + Δt) among the measured power values between a sixth step for determining whether or not the time is within the time and a falling time (Δt ₃ ) preset in the storage unit ₃ ) is different from the fifth power value (P (t ′ + Δt ₃ )) at the sixth time (P (t ′ + Δt ₂ + Δt ₃ )) at the sixth time (t ′ + Δt ₂ + Δt ₃ ). When the falling power value preset in the storage unit is exceeded, a seventh step for determining that there is a falling bottom, and the power value measured in the fourth step continues the power threshold value. And the rising peak in the fifth step In the sixth step, it is determined that the time during which the power value that is substantially equal to or greater than the same is continuously maintained is within the rising power duration, and that the falling bottom is present in the seventh step. The resident activity detection system determines that there is resident activity between the third time (t ′) and the sixth time (t ′ + Δt ₂ + Δt ₃ ). Steps.

  The invention according to claim 3 is a system for determining whether or not there is a resident's activity at the first time (t) in the resident activity detection system in which the power value measured by the power meter is input. From the storage unit and the first time (t), the power value measured by the wattmeter is traced back more than the threshold value preset in the storage unit of the resident activity detection system, It is determined whether or not the power threshold preset in the storage unit is continuously exceeded, and the first of the measured power values during the rise time (Δt) preset in the storage unit A difference between the first power value (P (t)) at time (t) and the second power value (P (t−Δt)) at the second time (t−Δt) is preset in the storage unit. When the measured rising power value is exceeded, it is determined that there is a rising peak and the measured A power unit that continuously exceeds the power threshold, and when it is determined that there is a rising peak, the resident activity detection system includes a calculation unit that determines that there is resident activity. Features.

The invention according to claim 4 is a system for determining whether or not there is a resident's activity at the third time (t) in the resident activity detection system to which the power value measured by the power meter is input. From the storage unit and the third time (t ′), the power value measured by the wattmeter is traced back more than the threshold value preset in the storage unit of the resident activity detection system. , Determining whether the power threshold value preset in the storage unit is continuously exceeded or not, and determining the _first of the measured power values during the rise time (Δt ₁ ) preset in the storage unit. The difference between the third power value (P (t ′)) at time 3 (t ′) and the fourth power value (P (t′−Δt ₁ )) at the fourth time (t′−Δt ₁ ). Is determined to have a rising peak when it exceeds the value of the rising power preset in the storage unit The time rising power value power value exceeds the is continuously maintained approximately equal to or more power values (Delta] t ₂₎ is, whether it is within predetermined rise power duration in the storage unit And the fifth power value (P (t) at the fifth time (t ′ + Δt ₃ ) among the measured power values during the fall time (Δt ₃ ) preset in the storage unit. '+ Δt ₃ )) and the sixth power value (P (t' + Δt ₂ + Δt ₃ )) at the sixth time (t '+ Δt ₂ + Δt ₃ ) are the falling power preset in the storage unit When it exceeds the value, it is determined that there is a falling bottom, the measured power value continues to exceed the power threshold, the rising peak is present, and the power value that is substantially equal to or greater than is maintained continuously. Is within the rising power duration, and the falling bottom is When it is determined that there is a resident activity, the resident activity detection system determines that there is a resident activity between the third time (t ′) and the sixth time (t ′ + Δt ₂ + Δt ₃ ). And an arithmetic unit for performing the processing.

  As described above, according to the present invention, when the user goes out without turning off the power of the air conditioning equipment, or when using the electrical appliance in the absence by using the timer function, the system is able to perform the activities of the residents. The frequency of erroneously determining that there is a decrease is reduced, and the accuracy of determining the activity of a resident at home can be improved.

It is a figure showing the relationship between time and electric power at the time of providing a power threshold in the prior art for determining whether a resident is active in a house or not. In a prior art, it is a figure showing the relationship between time and electric power in case a resident goes out without turning off the power supply of an air conditioning apparatus. In a prior art, it is a figure showing the relationship between time and electric power in case a resident uses an electrical appliance in absence when a resident uses a timer function. It is a figure which shows the function structure of the detection system in embodiment of this invention. In the embodiment of the present invention, the relationship between time and power in the case where it is determined whether or not a resident is active at home using the essential parameters in the embodiment of the present invention is shown. In the embodiment of the present invention, the relationship between time and power in the case where it is determined whether or not a resident is active at home using the essential parameter and the optional parameter in the embodiment of the present invention is shown. It is a figure which shows the flow about the procedure in which the detection system detects the activity of a resident in a house in the embodiment of the present invention. It is a figure showing the relationship between time and electric power in case the activity of a resident in a house is detected only when electric power is larger than an electric power threshold and there is a steep rise of electric power in an embodiment of the present invention. It is a figure which shows the function structure of the detection system in the 1st Embodiment of this invention. It is a figure in the 1st Embodiment of this invention which shows the flow about the procedure which detects the activity of the in-home resident. It is a figure showing the relationship between time and electric power about the method of detecting a resident's activity using an essential parameter in the 1st Embodiment of this invention. It is a figure which shows the function structure of the detection system in the 2nd Embodiment of this invention. It is a figure in the 2nd Embodiment of this invention which shows the flow about the procedure which detects the activity of the resident | resident in a house. It is a figure showing the relationship between time and electric power about the method of detecting a resident's activity using an essential parameter and an optional parameter in the 2nd Embodiment of this invention. It is a figure which shows an example of the result of having detected the activity of the resident in the house in the 1st Embodiment of this invention. It is a figure which shows an example of the result of having detected the activity of the resident in the house in the 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Basic configuration of the invention)
The basic configuration of the present invention is configured by parts or programs having the following functions.

  FIG. 4 shows a functional configuration of the detection system in the embodiment of the present invention. As an example, this system includes an input interface 10, a storage unit 20, a calculation unit 30, and an output interface 50. The input interface 10 includes a power time series data input unit 11 and a detection parameter input unit 12, the storage unit 20 includes a power time series data storage unit 21 and a detection parameter storage unit 22, and the calculation unit 30 is a human activity detection unit. 31 and the output interface 40 includes a detection result output unit 41.

  The power time-series data input unit 11 is an interface for inputting power time-series data obtained from a power sensor or the like, measured for a predetermined time, to the storage unit 20 as numerical information. . The sampling interval of power time-series data used in this system is preferably about 1 minute, but is not limited to 1 minute. The detection parameter input unit 12 includes preset detection parameters including essential parameters such as a power threshold necessary for detecting a resident's activity (in the second embodiment, optional parameters such as rising power duration are also included). This is an interface for inputting to the storage unit 20. The power time series data storage unit 21 has a function of storing the power time series data acquired by the power time series data input unit 11 within an arbitrary period. The detection parameter storage unit 22 has a function of storing the detection parameters acquired by the detection parameter input unit 12. The human activity detection unit 31 performs an operation of detecting the activity of a resident in the house using the power time series data stored in the power time series data storage unit 21 and the detection parameters stored in the detection parameter storage unit 22. Has a function (the calculation method will be described later). The detection result output unit 51 has a function of outputting the result of detecting the activity of a resident in the house calculated by the human activity detection unit 31 to an external device such as a monitor.

  The following are details and reference values of power threshold, power continuation time beyond threshold, rising power, and rising time, which are detection parameters (essential parameters) that are essential for this system to detect the activities of residents in the house. I write. The essential parameter is used for the human activity detector 31 to perform a calculation for detecting the activity of a resident in the house.

  FIG. 5 shows the relationship between time and power when determining whether or not a resident is active at home using essential parameters in the embodiment of the present invention. FIG. 6 shows the relationship between time and power when determining whether or not a resident is active at home using the essential parameters and optional parameters in the embodiment of the present invention.

  Here, the time at which the detection is focused (the time at which it is detected whether or not the resident is active. It is arbitrarily set) is t in FIG. 5 and t ′ in FIG. 6, and the timing of times t and t ′. 5 is P (t) in FIG. 5 and P (t ′) in FIG.

  The electric power threshold is a value of electric power used for determining the activity / inactivity of the resident in the house. As a method for acquiring the power threshold, a method that is a conventional technique may be used. As an example of the acquisition method, a person may set the power threshold to 300 W, 500 W, or the like. When the current power P (t) and P (t ′) are larger than the power threshold, the resident may be active, and when the current power is smaller than the power threshold, the resident is inactive. It may be determined by 31. The reference value of the power threshold is preferably between 50 W and 1000 W, but is not limited to this.

  The power continuation time equal to or greater than the threshold value is a system that determines whether or not the power used by the resident is continuously larger than the power threshold by going back a certain time from the times t and t ′ when detecting whether or not the resident is active. The time determined by Although about 30 minutes is preferable, it is not limited to 30 minutes.

  The rising power indicates a steep rising, and is a magnitude of electric power required for rising of an arbitrary electric appliance. Pre-stored in the detection parameter storage unit 22. A refrigerator with high automatic control has a power consumption of about 300 W, and a cooking appliance such as a microwave oven that is triggered by a human operation has many devices that consume power of 500 W or more. Therefore, the rising power value is preferably about 500 W. However, it is not limited to 500W. If the power used by the resident is greater than the power threshold and further exceeds the rising power within a certain period, the system determines that the resident is active.

The rise time is a time taken for the rise of power of an arbitrary electric appliance. Previously stored in the sensed parameter storage unit 22, a Delta] t ₁ in Delta] t, 6 in FIG. The rising speed of the electric power varies depending on the electric appliance, and depending on the use timing of the device, the electric power does not necessarily rise in one sampling period of the power time series data. For example, when the power time series data sampling period is 1 minute, the rise time is preferably about 2 minutes. However, it is not limited to 2 minutes. The value of the rise time is preferably set to an appropriate value according to the sampling period.

The rising peak is a time at which it is detected whether or not an arbitrarily set resident is active among the measured power values between the rising times Δt and Δt ₁ preset in the detection parameter storage unit 22. t, t 'of the power value P (t), P (t ') and time (t-Δt), the power value P (t-Δt) at _{(t'-Δt 1), P} (t'-Δt 1) Is greater than the value of the rising power preset in the detection parameter storage unit 22.

  If the power used by the resident is greater than the power threshold and is further determined to be “rise peak”, the system determines that there is resident activity.

  The details of the rising power duration, falling power, and falling time, which are detection parameters (optional parameters) used in this system as an option to improve the accuracy of detecting resident activity in the home, are as follows: Write a reference value. The use of the option parameter by the human activity detector 31 means that the power fall is used for detecting the resident activity in addition to the power rise. Applying optional parameters improves accuracy. On the other hand, the frequency of detecting resident activities in the home is reduced.

The rising power continuation time is the time during which the use of power equal to or higher than the rising power continues from the end of power rising to the start of power falling. Pre-stored in the detection parameter storage unit 22. The time Δt ₂ shown in FIG. 6 is within the rising power duration time is one condition for the system to determine that the resident is active. A specific example of “power that is equal to or higher than the rising power” can be obtained by a method such as multiplying the rising power by 0.9 or 0.8. Since there are many cooking appliances whose operation ends within about one hour, the value of the rising power duration is preferably about one hour. However, it is not limited to one hour.

  Falling power refers to a certain amount of power from the start of falling power of any electrical appliance, and is power that serves as a reference for detecting resident activity. Pre-stored in the detection parameter storage unit 22. If the power after the resident stops using the appliance is greater than the power threshold, and if the decrease in the amount of power due to the resident quitting the use of the appliance exceeds the falling power within a certain period, the system It is determined that the resident was active. The falling power stored in advance in the detection parameter storage unit 22 is preferably 500 W, similar to the rising power. However, it is not limited to 500W.

The fall time is a time taken for the fall of electric power of an arbitrary electric appliance. It is stored in advance in the detection parameter storage unit 22 and is Δt ₃ in FIG. The fall time is preferably 2 minutes like the rise time. However, it is not limited to 2 minutes.

The falling bottom is the power value P (t ′ + Δt) at time (t ′ + Δt ₂ + Δt ₃ ) among the measured power values during the falling time Δt ₃ preset in the detection parameter storage unit 22. ₂ + Δt ₃ ) and a difference between the power value P (t ′ + Δt ₂ ) at a time (t ′ + Δt ₂ ) when a predetermined time Δt ₂ has elapsed from an arbitrarily set time t ′ is stored in the detection parameter storage unit 22 in advance. It means a state that exceeds the set value of falling power.

If the power used by the resident is greater than the power threshold and is further determined to be “rising peak” and the time Δt ₂ is within the rising power duration time and in addition to “falling bottom”, the system It is determined that there is resident activity between time t ′ and time (t ′ + Δt ₂ + Δt ₃ ).

  In FIG. 7, the flow about the procedure in which the detection system detects the activity of a resident in a house in the embodiment of the present invention is shown.

  The procedure in which this system detects the activities of residents in the home will be described with reference to FIG. The power time series data input from the power time series data input unit 11 is stored in the power time series data storage unit 21 (S100). The detection parameters input from the detection parameter input unit 12 are stored in the detection parameter storage unit 22 (S200). The human activity detector 31 uses the power time-series data and the detection parameters to perform an operation for detecting the activity of the resident in the house (S300) (details regarding the method of detecting the resident activity will be described later). The detection result output unit 51 outputs the calculation result of step S300 to the external device (S400).

  FIG. 8 shows the relationship between time and power, including the case where the activity of a resident in the house is detected only when the power is larger than the power threshold and there is a steep rise in power in the embodiment of the present invention. Represent.

  According to the configuration of the embodiment of the invention, in a state where it is determined that the power threshold is exceeded, there is a possibility that a person is active at home at a timing when there is a steep rise in power that exceeds a certain level. It is determined that the property is extremely high (G in FIG. 5).

  Conversely, even if an appliance is used in the absence by using the timer function (H in FIG. 8), although there is a sharp rise in power, the start of rise is smaller than the power threshold, so no activity is detected (see FIG. 8 I). Moreover, even if the air conditioner is turned off without turning off the power (J in FIG. 8), the power is larger than the power threshold, but there is no sharp rise in power, so no activity is detected (K in FIG. 8).

(First embodiment)
FIG. 9 shows a functional configuration of the detection system in the first embodiment of the present invention. As in FIG. 4, the present system includes an input interface 10, a storage unit 20, a calculation unit 30, and an output interface 40 as an example. The input interface 10 includes a power time series data input unit 11 and a detection parameter input unit 12, the storage unit 20 includes a power time series data storage unit 21 and a detection parameter storage unit 22, and the calculation unit 30 is a human activity detection unit. 31 and the output interface 40 includes a detection result output unit 41. The human activity detection unit 31 includes a first determination unit 32, a second determination unit 33, and a third determination unit 34.

  FIG. 10 shows a flow of a procedure for detecting an activity of a resident in the house in the first embodiment of the present invention. FIG. 11 shows the relationship between time and power for a method for detecting a resident's activity using essential parameters in the first embodiment of the present invention.

  FIG. 5 and FIGS. 9 to 11 show a method (corresponding to the details of step S300 in FIG. 7) of detecting resident activity using essential parameters (power threshold, power continuation time above threshold, rising power, rising time). Will be described. If the time at which the detection is focused is t and the power at the time t is P (t), the measured power P (t) continues the power threshold in step S500 by the first determination unit 32. The time exceeding the threshold value stored in advance in the detection parameter storage unit 22 is longer than the power duration time, that is, all the powers of the “time duration greater than the threshold value” at time t are all equal to or greater than the “power threshold value”. If there is, the process proceeds to step S600. In step S500 performed by the first determination unit 32, the time during which the power threshold is continuously exceeded is not longer than the power continuation time that is previously stored in the detection parameter storage unit 22, that is, the “threshold value nearest to time t”. When even one of the above “power continuation time” is smaller than the “power threshold value”, the processing is terminated assuming that there is no resident activity at home at time t. In step S600 by the second determination unit 33, it is determined whether or not there is a power increase exceeding the “rising power” within the “rising time Δt” nearest to time t. If there is a power increase, there is a rising peak. The process proceeds to step S700, and if there is no increase in power, the process is terminated assuming that there is no resident activity at home at time t. In step S700 by the third determination unit 34, it is determined that there is a resident activity at home at time t. When the first acquisition time of power time series data is ts and the last acquisition time is te, time t is sequentially incremented from the first acquisition time ts to the last acquisition time te, and steps S500 to S700 are performed. Thus, it is possible to detect the activities of residents in the house during the period from the first acquisition time ts to the last acquisition time te.

(Second Embodiment)
FIG. 12 shows a functional configuration of the detection system in the second embodiment of the present invention. As in FIG. 4, the present system includes an input interface 10, a storage unit 20, a calculation unit 30, and an output interface 40 as an example. The input interface 10 includes a power time series data input unit 11 and a detection parameter input unit 12, the storage unit 20 includes a power time series data storage unit 21 and a detection parameter storage unit 22, and the calculation unit 30 is a human activity detection unit. 31 and the output interface 40 includes a detection result output unit 41. The human activity detector 31 includes a fourth determination unit 35, a fifth determination unit 36, a sixth determination unit 37, a seventh determination unit 38, and an eighth determination unit 39.

  FIG. 13 shows a flow of a procedure for detecting an activity of a resident in the house in the second embodiment of the present invention. FIG. 14 shows the relationship between time and power in a method for detecting resident activity using essential parameters and optional parameters in the second embodiment of the present invention.

  Next, a diagram of a method for detecting resident activity using essential parameters and optional parameters (power threshold, power continuation time above threshold, rise power, rise time, rise power duration, fall power, fall time) 6 and FIG. 12 to FIG.

If the time focused on the detection is t ′, in step S800 by the fourth determination unit 35, all the powers of the “power continuation time longer than threshold value” at the time t ′ are all equal to or higher than the “power threshold value”. If so, the process proceeds to step S900. In step S800 by the fourth determination unit 35, when even one of the powers of the “power continuation time equal to or greater than the threshold value” at time t ′ is smaller than the “power threshold value”, there is no resident activity at home at time t ′. The process ends. In step S900 by the fifth determination unit 36, it is determined whether there is a power increase exceeding the “rising power” within the “rising time Δt ₁ ” nearest to time t ′. If it is determined that there is no power increase, the process ends with no resident activity at home at time t ′. Assuming that the power at the timing of time t ′ is P (t ′), P (t ′) is the power immediately after the power rise because the sixth determination unit 37 passes through step S900 in step S1000. ing. After time t ′, it is determined whether or not the time for which the power is equal to or greater than P (t ′) is within the “rising power duration”, and if within, the process proceeds to step S1100, and if above, at time t. The processing is terminated assuming that there is no resident activity in the house. A specific example of “power equal to or greater than P (t ′)” can be obtained by multiplying P (t ′) by 0.9 or 0.8. In step S1100 by the seventh determination unit 38, since the process goes through step S1000, the power value is equal to or less than P (t) in the period from time t to “rising power continuation time”. When P (t ') time the timing that became the equal to or less than the (t' + Δt _2), the size of more than a "falling power" the most recent of the "fall time Δt _3" within the time (t '+ Δt ₂₎ If there is a power drop, it is determined that there is a falling bottom, and the process proceeds to step S1200. If there is no power drop, from time t ′ to time (t ′ + Δt ₂ + Δt ₃ ). Processing is terminated assuming that there is no resident activity in the house during the period. In step S1200 by the eighth determination unit 39, it is determined that there is a resident's activity in the house during the period from time t ′ to time (t ′ + Δt ₂ + Δt ₃ ). When the first acquisition time of power time-series data is ts and the last acquisition time is te, the time t ′ is sequentially incremented from the first acquisition time ts to “last acquisition time te−rising power duration”. By implementing steps S800 to S1000, it is possible to detect the activities of residents in the house during the period from the first acquisition time ts to the last acquisition time te.

  FIG. 15 shows an example of the result of detecting the resident activity in the home using the essential parameters in the first embodiment of the present invention, and FIG. 16 shows the essential parameters in the second embodiment of the present invention. And an example of the result of having detected the activity of the resident in the house using an option parameter is shown. The timing at which the activity is detected is represented by a stripe line penetrating the vertical axis.

  As described above, according to the embodiments of the present invention, when going out without turning off the power of the air conditioning equipment, or when using the electrical appliance in the absence by using the timer function, the detection system performs the activities of the residents. The frequency of misjudgment as being lower can be reduced, and the accuracy of judging the activities of residents in the house can be improved.

  In this patent draft, power data is used as analysis data, but the same effect can be expected even if current data is used instead of a method or system limited to use of power data.

DESCRIPTION OF SYMBOLS 10 Input interface 11 Power time series data input part 12 Detection parameter input part 20 Storage part 21 Power time series data storage part 22 Detection parameter storage part 30 Calculation part 31 Human activity detection part 32 1st determination part 33 2nd determination part 34 third determination unit 35 fourth determination unit 36 fifth determination unit 37 sixth determination unit 38 seventh determination unit 39 eighth determination unit 40 output interface 41 detection result output unit

Claims (4)

In a resident activity detection system in which a power value measured by a power meter is input, a method for determining whether there is a resident activity at a first time (t),
From the first time (t), the power value measured by the wattmeter is stored in the storage unit in advance by going back the power continuation time more than a preset threshold value in the storage unit of the resident activity detection system. A first step of determining whether to continue to exceed a set power threshold;
Of the measured power values during the rise time (Δt) preset in the storage unit, the first power value (P (t)) at the first time (t) and the second time ( a second step of determining that there is a rising peak when the difference of the second power value (P (t−Δt)) in t−Δt) exceeds the value of the rising power preset in the storage unit; ,
When the measured power value in the first step continues to exceed the power threshold and it is determined in the second step that the rising peak is present, the resident activity detection system And a third step of determining that there is activity. In a resident activity detection system in which a power value measured by a power meter is input, a method for determining whether there is a resident activity at a third time (t),
From the third time (t ′), the power value measured by the power meter is traced back to the storage unit by going back the power continuation time by a predetermined threshold or more in the storage unit of the resident activity detection system. A fourth step of determining whether to continue to exceed a preset power threshold;
Of the measured power value during the rise time (Δt ₁ ) preset in the storage unit, the third power value (P (t ′)) at the third time (t ′) and the fourth When the difference in the fourth power value (P (t′−Δt ₁ )) at the time (t′−Δt ₁ ) exceeds the value of the rising power preset in the storage unit, there is a rising peak. A fifth step of determining;
It is determined whether or not the time (Δt ₂ ) during which the power value exceeding the rising power value is continuously maintained at a power value that is substantially equal to or greater than the rising power duration time set in advance in the storage unit. A sixth step of determining;
A fifth power value (P (t ′ + Δt ₃ ) at a fifth time (t ′ + Δt ₃ ) among the measured power values during the fall time (Δt ₃ ) preset in the storage unit. ) And the sixth power value (P (t ′ + Δt ₂ + Δt ₃ )) at the sixth time (t ′ + Δt ₂ + Δt ₃ ) exceeds a falling power value preset in the storage unit A seventh step for determining that there is a falling bottom;
The power value measured in the fourth step continues to exceed the power threshold, the rising peak is in the fifth step, and the power value is substantially equal to or greater than in the sixth step. And when the rising time is within the rising power continuation time and it is determined in the seventh step that the falling bottom is present, the third time (t ′) and the sixth time And an eighth step in which the resident activity detection system determines that there is resident activity between times (t ′ + Δt ₂ + Δt ₃ ). In a resident activity detection system to which a power value measured by a power meter is input, it is a system for determining whether there is a resident activity at a first time (t),
A storage unit;
From the first time (t), the power value measured by the wattmeter is stored in the storage unit in advance by going back the power continuation time more than a preset threshold value in the storage unit of the resident activity detection system. Determine whether the set power threshold is continuously exceeded,
Of the measured power values during the rise time (Δt) preset in the storage unit, the first power value (P (t)) at the first time (t) and the second time ( When the difference of the second power value (P (t−Δt)) at t−Δt) exceeds the value of the rising power preset in the storage unit, it is determined that there is a rising peak,
A calculation unit that determines that the resident activity detection system has a resident activity when it is determined that the measured power value continuously exceeds the power threshold and the rising peak is present. A system characterized by that. In a resident activity detection system to which a power value measured by a wattmeter is input, it is a system for determining whether or not there is a resident activity at a third time (t),
A storage unit;
From the third time (t ′), the power value measured by the power meter is traced back to the storage unit by going back the power continuation time by a predetermined threshold or more in the storage unit of the resident activity detection system. Determine whether to continue to exceed the preset power threshold,
Of the measured power value during the rise time (Δt ₁ ) preset in the storage unit, the third power value (P (t ′)) at the third time (t ′) and the fourth When the difference in the fourth power value (P (t′−Δt ₁ )) at the time (t′−Δt ₁ ) exceeds the value of the rising power preset in the storage unit, there is a rising peak. Judgment,
It is determined whether or not the time (Δt ₂ ) during which the power value exceeding the rising power value is continuously maintained at a power value that is substantially equal to or greater than the rising power duration time set in advance in the storage unit. Judgment,
A fifth power value (P (t ′ + Δt ₃ ) at a fifth time (t ′ + Δt ₃ ) among the measured power values during the fall time (Δt ₃ ) preset in the storage unit. ) And the sixth power value (P (t ′ + Δt ₂ + Δt ₃ )) at the sixth time (t ′ + Δt ₂ + Δt ₃ ) exceeds a falling power value preset in the storage unit Determine that there is a falling bottom,
The measured power value continuously exceeds the power threshold, the rising peak is present, and the time for continuously maintaining the power value approximately equal to or greater than the same is within the rising power duration time, When it is determined that there is a falling bottom, the resident activity detection system performs the resident activity between the third time (t ′) and the sixth time (t ′ + Δt ₂ + Δt ₃ ). And a calculation unit that determines that there is a system.

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