JP5583040B2 - Electrical device operation detection system, electrical device operation detection method, apparatus and program used therefor - Google Patents

Description

  The present invention relates to an electrical equipment operation detection system, an electrical equipment operation detection method, and an apparatus and program used therefor, and more specifically, an electrical equipment operation detection system, an electrical equipment operation detection method, and an electrical equipment operation detection method for detecting an operation of a specific indoor electrical equipment, The present invention relates to an apparatus and a program used therefor.

  In order to confirm the safety of a resident, a harmonic signal generator that applies a characteristic harmonic signal to a power line in accordance with the operation of an electric device has been proposed (see Patent Document 1 below).

  This harmonic signal generator is intended to detect electric devices that residents must use in their daily lives, such as incandescent light bulbs in indoor toilets, and when the electric devices to be detected are turned on, A characteristic harmonic signal is applied to the power line by intermittently interrupting the current supplied from the line to the operation detection target. The presence / absence of the operation of the electric device to be detected is determined by whether or not a characteristic harmonic signal exists on the power line.

JP 2005-160130 A

  The harmonic generator disclosed in Patent Document 1 directly obtains operating power from the power source of the motion detection target electrical device. For this reason, it is necessary to process the power source itself of the electrical device subject to motion detection. Therefore, it is necessary to modify the electrical equipment itself or wiring by a specialist.

  In addition, electrical equipment applies a certain amount of harmonics to the power line. Moreover, there are a wide variety of electrical devices connected to the power supply line, and the frequency and magnitude of the harmonics applied to the power supply line are also various. For example, an electric device including a switching element such as a light bulb dimmer or a fluorescent lamp with an inverter applies a harmonic component in a wide frequency band to a power supply line. Therefore, it is difficult to distinguish a specific harmonic signal applied to the power line by the harmonic generator from other harmonic components and to determine that the motion detection target electrical device has been operated.

  The present invention has been made under the above-described circumstances, and an object of the present invention is to make it possible to determine the operation of an operation detection target electrical device with a simple configuration. Another object of the present invention is to make it possible to more reliably detect the operation of the electrical device subject to motion detection.

In order to achieve the above object, an electrical equipment operation detection system according to the present invention comprises an electrical equipment detection device for detecting the presence or absence of an electrical equipment operation connected to an indoor power line, and a variable impedance device connected to the electrical equipment. An electrical equipment operation detection system comprising:
The electrical device detection apparatus transmits a transmission signal whose frequency continuously changes in a specific bandwidth including at least one specific frequency to the power supply line, and is transmitted to the power supply line by the transmission means. Receiving means for receiving the transmitted signal and obtaining a measurement signal for measuring the impedance of the power supply line, and detecting whether the measurement signal obtained by the receiving means includes a signal of the specific frequency Detecting means,
The variable impedance device includes a power supply means for generating a predetermined voltage based on an electromotive force induced by electromagnetic coupling with a current flowing through the power supply line during operation of the electric device, and the power supply means supplied from the power supply means Impedance changing means that operates by voltage and changes the impedance of the power supply line in response to the specific frequency included in the transmission signal sent to the power supply line by the electrical device detection device. It is characterized by.

In order to achieve the above object, the electrical device detection device of the present invention is an electrical device detection device used in an electrical device operation detection system that detects the presence or absence of operation of an electrical device connected to an indoor power line.
A transmission means for transmitting a transmission signal whose frequency continuously changes in a specific bandwidth including at least one specific frequency to the power supply line; and a transmission signal transmitted to the power supply line by the transmission means. A receiving unit that acquires a measurement signal for measuring the impedance of the power line, and a measurement signal acquired by the receiving unit that is induced by electromagnetic coupling with a current that flows through the power line during operation of the electrical device. And detecting means for detecting whether or not the signal of the specific frequency generated by the variable impedance means operated by electric power is included.

In order to achieve the above object, the variable impedance device of the present invention is a variable impedance device used in an electrical equipment operation detection system that detects the presence or absence of an electrical equipment operation connected to an indoor power line,
A power supply means for generating a predetermined voltage based on an electromotive force induced by electromagnetic coupling with a current flowing through the power supply line during operation of the electrical device; and the power supply means operates by the voltage supplied from the power supply means, Impedance changing means for changing the impedance of the power supply line in a specific manner in response to a specific frequency included in a transmission signal superimposed on a voltage supplied to the electrical device in the power supply line. Features.

In order to achieve the above object, an electrical device operation detection method of the present invention is an electrical device operation detection method for detecting the presence or absence of an operation of an electrical device connected to an indoor power line,
The transmission means transmits a transmission signal whose frequency continuously changes in a specific bandwidth including at least one specific frequency to the power line, and the reception means transmits the power transmitted to the power line by the transmission means. A measurement signal for receiving the signal and measuring the impedance of the power supply line is acquired, and the detection means is configured to detect the measurement signal acquired by the reception means as an electromagnetic wave with a current flowing through the power supply line during operation of the electrical device. It is detected whether or not the signal of the specific frequency generated by the variable impedance means that is operated by the electromotive force induced by the coupling is included, and the impedance changing means is connected to the power supply line during the operation of the electric device. The impedance of the power supply line is changed in a peculiar manner in response to the specific frequency included in the transmitted transmission signal.

In order to achieve the above object, the program of the present invention is a program for detecting the presence or absence of an operation of an electric device connected to an indoor power line,
Transmitting a transmission signal whose frequency continuously changes in a specific bandwidth including at least one specific frequency to the power supply line; receiving the transmission signal transmitted to the power supply line; and impedance of the power supply line A step of acquiring a measurement signal to measure the variable impedance means generated by an electromotive force induced by electromagnetic coupling between the acquired measurement signal and a current flowing through the power line during operation of the electrical device. Detecting whether or not a signal of a specific frequency is included, and causing the computer to execute.

  According to the present invention, it is possible to discriminate the operation of the motion detection target electrical device with a simple configuration. In addition, it is possible to more reliably detect the operation of the operation detection target electrical device.

It is a block diagram which shows the electric equipment operation | movement detection system in each embodiment of this invention. It is a block diagram which shows the structure of the electric equipment detection apparatus in each embodiment. It is a block diagram which shows the structure of the variable impedance apparatus in 1st Embodiment. It is a figure which shows the signal waveform in 1st Embodiment. It is a figure which shows the structure of the open / close type of the transformer in FIG. It is a figure which shows the division | segmentation type structure of the trans | transformer in FIG. It is a flowchart which shows the detection operation of the electric equipment by the electric equipment detection apparatus of FIG. It is a figure which shows the variable impedance circuit in 2nd Embodiment. It is a figure which shows the signal waveform in 2nd Embodiment. It is a figure which shows the structure of the variable impedance apparatus in 3rd Embodiment. It is the figure which represented the signal waveform in 4th Embodiment by the time-axis. It is a figure which shows the signal waveform in n electric equipment in 5th Embodiment of this invention. It is a figure which shows the relationship between ID of n electrical equipment and allocation frequency in 5th Embodiment of this invention.

  Hereinafter, first to fifth embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of an electric equipment operation detection system 1 common to the embodiments. In this electrical equipment operation inspection system 1, the power source 10 symbolically represents a substation of an electric power company or the nearest transformer, and a predetermined AC voltage is supplied indoors by a lead-in line. The distribution board 11 appropriately distributes the supplied AC voltage to each room, entrance, bathroom, toilet, etc. by a plurality of power lines 12.

  The distributed power lines 12 are connected to electrical devices such as incandescent bulbs, fluorescent lamps, refrigerators, television receivers, and microwave ovens. For example, the electric device 13a is an incandescent bulb, and the electric device 13b is a television receiver. The electrical device 13a is attached to a socket provided on the ceiling, and is turned on by operating a switch provided on the wall. The electrical device 13b is operated by turning on a switch of the electrical device 13b body by inserting an AC cord plug into a wall outlet or a power strip distribution outlet, that is, a receptacle.

  The electrical device detection device 14 provided in the distribution board 11 determines whether or not a specific electrical device connected to the power line 12 (in this case, the television receiver of the electrical device 13b) is operating. To detect. Among various electric devices, lighting of incandescent bulbs and fluorescent lamps and viewing of television receivers are part of the lives of residents. In each embodiment, the electrical device detection device 14 determines, for example, the safety of an elderly person living alone by detecting whether or not a television receiver that is a specific electrical device 13b is operating.

  The variable impedance device 15 is a device that is detachably inserted between the power supply line 12 and the electric device 13b, and its impedance changes when the electric device 13b is in operation. Therefore, when viewed from the electrical device detection device 14, the impedance of the variable impedance device 15 as a load changes. The electric device detection device 14 measures the presence or absence of a change in the impedance of the variable impedance device 15, and detects the presence or absence of the operation of the electric device 13b. The change in impedance will be described later.

FIG. 2 is a block diagram showing the internal configuration of the electrical device detection apparatus 14. In FIG. 2, a transmission unit 141 (transmission means) is a sine wave that continuously changes from a lower limit frequency (referred to as “f ₁ ”) to an upper limit frequency (referred to as “f ₂ ”) of a predetermined frequency bandwidth. An injection signal (transmission signal) including a signal or a pulse signal is transmitted to the power supply line 12. This injection signal is a signal (so-called sweep signal) whose frequency continuously changes in a range from frequency f ₁ to frequency f ₂ including at least one specific frequency (referred to as “f ₀ ”). FIG. 4A shows the frequency band of the injection signal. This injection signal is superimposed on the AC voltage of the power line 12. The frequency f ₀ is arbitrarily set in the range from the frequency f ₁ to the frequency f _2, but is preferably set to a frequency excluding the harmonic frequency of the power supply frequency.

The receiving unit 142 (receiving means) includes a band-pass filter (not shown) having a bandwidth from the frequency f ₁ to the frequency f ₂ and includes an injection signal superimposed on the AC voltage of the power line 12. The signal component and the noise component are received as a measurement signal for measuring the load impedances of the power supply line 12 and all loads connected to the power supply line 12 and operating. When viewed from the transmission unit 141 described above, the power line 12, all the electrical devices 13a connected to the power line 12 and operating, the other electrical devices not shown in FIG. Functions as a load impedance. However, since the input impedance of the reception unit 142, that is, the load impedance of the reception unit 142 viewed from the transmission unit 141 is very high, the measurement signal is hardly affected.

  The A / D converter 143 samples the analog measurement signal of the load impedance received by the receiver 142 and converts it into digital load impedance data.

  A CPU (Central Processing Unit) 144 is a computer that executes a program for controlling the entire electrical device detection device 14 via the system bus 147 and detecting the operation of the electrical device 13 b connected to the power line 12. is there. The CPU 144 also has a communication function for communicating with a monitoring center (not shown) that monitors information for confirming the safety of the resident through a dedicated or general-purpose communication line or the power line 12. ing.

EEPROM (Electric Erasable Programmable Read Only Memory ) 145 ( hereinafter, referred to as ROM 145) is a rewritable nonvolatile memory as a flash memory, etc., storing a specific data of the frequency _{f 0} of the program and above the CPU144 executes doing. These programs and data of the frequency f ₀ may be stored in the ROM 145 in advance, or may be stored in a memory chip that can be attached to and detached from the electrical device detection device 14. Or it is also possible to install from the outside by the communication function of CPU144.

  A RAM (Random Access Memory) 146 is used as a work area of the CPU 144, programs and various parameters executed by the CPU 144, digital load impedance data obtained from the A / D converter 143, and arithmetic processing data by the CPU 144. Etc. are temporarily stored. The RAM 146 is provided with areas 1 and 2 for storing load impedance data, and other registers necessary for program execution.

  The electrical device detection device 14 can also be configured by a computer including a one-chip microprocessor in which the CPU 144, the transmission unit 141, the reception unit 142, the A / D conversion unit 143, the ROM 145, and the RAM 146 are integrated. It is.

Next, a first embodiment of the present invention will be described with reference to FIGS.
FIG. 3 is a block diagram showing the internal configuration of the variable impedance device 15 of FIG. The variable impedance device 15 is a device configured to be variable in impedance on a frequency axis such as a programmable filter, and includes a transformer 151 (first transformer), a power supply circuit 152, a variable impedance circuit 153, and a transformer 156 (second transformer). It is configured to have a transformer.

  The transformer 151 is a current transformer having a core material such as ferrite, and one winding on the primary side loops around any one of the two power supply lines 12, and N on the secondary side. Is a 1-to-N transformer connected to the power supply circuit 152. That is, the transformer 151 is an electromagnetic coupling unit that amplifies the electromotive force induced on the primary side by N times and supplies it to the power circuit 152 by electromagnetic coupling with the current flowing through the power line 12 during the operation of the electric device 13b. Configure.

  The power supply circuit 152 constitutes power supply means that generates a DC voltage based on the electromotive force supplied from the transformer 151 and supplies the DC voltage to the variable impedance circuit 153. For this reason, although not shown in the figure, the power supply circuit 152 is provided with a rectifier circuit, a smoothing circuit, and the like.

Variable impedance circuit 153 is a filter whose impedance decreases at a specific frequency f _0. FIG. 4B shows the filter characteristic, that is, the impedance characteristic. As described above, the variable impedance circuit 153 is a programmable filter, and a specific frequency f ₀ can be arbitrarily set within the frequency band of the injection signal shown in FIG.

  Similarly to the transformer 151, the transformer 154 is a current transformer having a core material such as ferrite. However, one winding on the primary side is connected to the variable impedance circuit 153, and the N windings on the secondary side are looped around one of the two power supply lines 12 in an N-to-1 relationship. It is a transformer. In other words, the transformer 154 constitutes an electromagnetic coupling means that applies to the power supply line 12 1/2 of the N square of the change in impedance characteristics shown in FIG. 4B of the variable impedance circuit 153 by electromagnetic coupling.

  FIG. 4C shows a measurement signal received by the receiving unit 143 in FIG. The signal waveform in FIG. 4C is a signal waveform in which the injection signal in FIG. 4A and the waveform of the impedance characteristic of the variable impedance circuit 153 in FIG. 4B are combined. However, the signal waveform in FIG. 4C represents the signal waveform when the power supply line 12 has no inductance component and capacitance component, that is, when the power supply line 12 viewed from the receiving unit 143 has only a resistance component. . Actually, since the route of the power supply line 12 and the electric device 13a and other electric devices include an inductance component and a capacitance component, the signal waveform of the measurement signal is distorted due to the influence. For this reason, as described later, the presence / absence of the operation of the electric device 13b is accurately obtained by acquiring in advance the impedance characteristic of the power line 12 when the electric device 13b is stopped by the learning function of the electric device detection device 14. To detect.

As described above, the variable impedance device 15 shown in FIG. 3 is a signal with a specific bandwidth including the frequency f ₀ at which the variable impedance circuit 153 causes an impedance change when viewed from the electrical device detection device 14 (FIG. 4B). ) Is generated, and the impedance of the power supply line 12 is changed to a specific mode via the transformer 154.

  In addition, since the variable impedance device 15 is engaged with the power supply line 12 in a non-contact manner by electromagnetic coupling, the variable impedance device 15 can be installed without requiring wiring work. Further, the transformer 151 (first transformer) and the transformer 154 (second transformer) are a clamp type having a split structure or an open / close structure.

  The transformer 151 is composed of a current transformer with a winding ratio of 1 to N having a core such as ferrite. The primary side of the transformer 151 loops around one of the pair of power supply lines 12 a connected to the detection target electrical device 13 b, and the N-turn winding is connected to the power supply unit 152 on the secondary side. . The transformer 151 boosts the electromotive force induced on the primary side by the electromagnetic coupling with the current flowing through the power supply line 12a by the operation of the electric device 13b by N times by the electromagnetic coupling between the primary winding and the secondary winding. To be supplied (applied) to the power supply unit 152. That is, as described above, the transformer 151 constitutes electromagnetic coupling means.

  FIG. 5 is a diagram showing the open / close type structure of the transformer. As shown in FIGS. 5A and 5B, the primary winding 1511 of the transformer 151 of the variable impedance device 15 is configured to be opened and closed like a clip. As shown in FIG. 5 (c), the primary winding 1511 is opened, and the power line 12 is arranged to pass through the loop, and subsequently, as shown in FIG. 5 (d), the closed state is set. Thus, the primary winding 1511 can be a closed circuit that intersects the power supply line 12. Therefore, for example, even after the power supply line 12 a is laid, the primary winding of the transformer 151 can be easily looped around the power supply line 12.

  FIG. 6 is a diagram showing a divided structure of the transformer. As shown in FIGS. 6A and 6B, a part of the primary winding 1511 can be separated and mounted. Also in this case, the primary winding 1511 can be a closed circuit intersecting with the power supply line by arranging the power supply line so as to pass through the loop and then closing the power supply line. Therefore, for example, even after the power supply line is laid, the primary winding of the transformer 151 can be easily looped around the power supply line.

  Next, the process of the electric equipment detection apparatus 14 which detects the presence or absence of operation | movement of the electric equipment 13b by 1st Embodiment is demonstrated. As described above, the electrical device detection device 14 measures the presence / absence of a change in the impedance of the variable impedance device 15 and detects the presence / absence of the operation of the electrical device 13b, but the power line 12 itself and other electrical devices 13a, etc. Is also a load, and these impedance changes are combined with the impedance changes of the variable impedance device 15.

  As described above, the measurement signal shown in FIG. 4C is actually a distorted signal waveform due to the influence of the line impedance of the power supply line 12 and the impedance of the electrical equipment 13a and other electrical equipment. The device 14 has a learning function for measuring in advance a change in impedance of the power supply line 12 when the electrical device 13b is stopped.

FIG. 7 is a flowchart showing the operation detection of the electric device 13b by the CPU 144 of the electric device detection apparatus 14.
When the electrical device detection device 14 is activated, an initialization process is performed (step S1). In this initialization processing, a program is loaded from the ROM 145 into the RAM 146, and the registers in the RAM 146, area 1 for storing impedance characteristic data, area 2, and predetermined registers are cleared.

  Next, it is determined whether or not an instruction to measure the impedance of the power supply line 12 has been made (step S2). This measurement instruction is performed, for example, by turning on a reset switch (not shown) of the electric device detection device 14 by a resident or a staff member of the monitoring center before the electric device 13b is turned on.

  When the measurement instruction of the impedance of the power supply line 12 is not made (step S2; NO), the measurement instruction is given while performing other processing, for example, monitoring of the voltage supplied to the electrical device detection device 14. wait.

  When an instruction to measure the impedance of the power supply line 12 is made (step S2; YES), the transmitter 141 transmits the injection signal shown in FIG. 4A to the power supply line 12 (step S3).

  Next, the measurement signal is received by the reception unit 142 (step S4), and the A / D (analog / digital) conversion process is performed on the measurement signal by the A / D conversion unit 143, and the impedance characteristic data of the power supply line 12 is obtained. Obtain (step S5).

  Next, the acquired impedance characteristic data of the power supply line 12 is stored in the area 1 of the RAM 146 (step S6). That is, the impedance characteristic data of the power supply line 12 when the electrical device 13b is stopped is stored in the area 1.

  Thereafter, the process proceeds to a process of actually detecting the presence or absence of the operation of the electric device 13b. In this case, the resident or the staff of the monitoring center may turn on the switch of the electric device 13b, or the resident desires to view the television receiver of the electric device 13b as necessary. The switch may be turned on.

  When the process shifts to a process for detecting the presence or absence of the operation of the electric device 13b, the transmission unit 141 transmits the injection signal shown in FIG. 4A to the power supply line 12 again (step S7).

  Next, the measurement signal is received by the receiving unit 142 (step S8), and the A / D conversion process is performed on the measurement signal by the A / D conversion unit 143 to acquire the impedance characteristic data of the power supply line 12 (step S9). ). Then, the acquired impedance characteristic data of the power supply line 12 is stored in the area 2 of the RAM 146 (step S10).

  Next, a calculation process for calculating a difference between the impedance characteristic data of the power supply line 12 stored in the area 1 of the RAM 146 and the impedance characteristic data of the power supply line 12 stored in the area 2 is performed (step S11). By this arithmetic processing, the distortion of the measurement signal due to the impedance characteristic of the power supply line 12 when the electrical equipment 13b included in both the area 1 and the area 2 is stopped is offset. As a result, the detection process based on the signal waveform without distortion shown in FIG.

Next, it is determined whether or not a signal having a specific frequency f ₀ , that is, the filter characteristic of the signal waveform shown in FIG. 4B is detected in the difference data calculated by the arithmetic processing in step S11. (Step S12). When the electric device 13b is not operating, the difference between the impedance characteristic data of the area 1 and the area 2 is almost zero. On the other hand, when the electric device 13b is operating, the difference between the impedance characteristic data of the area 1 and the area 2 is the filter characteristic data of the signal waveform shown in FIG. It becomes data including a signal of a frequency f _0.

  When a specific frequency signal is detected (step S12; YES), it is determined whether or not the value of the register ERR in the RAM 146 (the initial value is 0 in the process of step S1) is 1 or more and a predetermined number or less. It discriminate | determines (step S13). The value of ERR will be described later.

  If the ERR value is 1 or more and not less than the predetermined number (step S13; NO) (as will be described later, in this case, the ERR value is 0), it is determined whether or not a predetermined time has elapsed. (Step S14). The predetermined time is, for example, 1 minute to several minutes, tens of minutes to 1 hour, or several hours, and can be set or changed by a resident or a staff of the monitoring center. For example, it is set as appropriate according to the motion detection target electrical device. Furthermore, it is also possible to set or change automatically by communication between the electrical device detection device 14 and the monitoring center. The predetermined time in this embodiment is 3 hours. Therefore, it is detected whether or not the television receiver whose resident is the electric device 13b is operating every three hours.

  If the predetermined time has not elapsed (step S14; NO), other processing such as voltage monitoring is performed to wait for the predetermined time to elapse. When a predetermined time has elapsed (step S14; YES), the process proceeds to step S7, the processing up to step S12 is executed, a specific frequency signal is detected (step S12; YES), and the value of ERR Is not less than the predetermined number, that is, if the value of ERR is 0 (step S13; NO), the loop processing from step S7 to step S14 is repeated.

  If the specific frequency signal is not detected (step S12; NO), the value of the register ERR in the RAM 146 is incremented by 1 (step S15). And it is discriminate | determined whether the value of ERR exceeded the predetermined number (step S16). This predetermined number can be set or changed by a resident or a staff of the monitoring center, and can be automatically set or changed by communication between the electrical device detection device 14 and the monitoring center. . In this case, the predetermined number is set to 9. Therefore, when the value of ERR exceeds the predetermined number and becomes 10, it is determined that the resident has not watched the television receiver even after 24 hours.

  If the value of ERR does not exceed the predetermined number (step S16; NO), the process proceeds to step S14, and the loop from step S7 to step S12 is repeated. If a specific frequency signal is detected in step S12 (step S12; YES), it is determined whether or not the value of ERR is not less than 1 and not more than a predetermined number (step S13). Here, when the value of ERR is equal to or less than a predetermined number, for example, 9 (step S13; YES), the value of ERR is reset to 0 (step S17).

  For example, if the resident has been out for nearly 24 hours and returned home and turned on the television receiver before the ERR value reached 10, the resident's safety was confirmed. Is reset to 0, and the process of detecting the presence / absence of the operation of the electric device 13b is restarted. In this case, the loop of step S14 and steps S7 to S12 is repeated.

  When the value of ERR exceeds the predetermined number (step S16; YES), it is determined that some trouble has occurred in the resident, and the monitoring center is notified (step S18). And the operation | movement of the detection process of an electric equipment is complete | finished.

As described above, according to the electrical apparatus operation detection system of the first embodiment, a continuous electrical equipment detector 14, at least one particular specific bandwidth including the frequency f ₀ (f1 to f2) A transmission unit 141 (transmission means) that transmits a transmission signal whose frequency changes to the power line 12 and a measurement signal that receives the transmission signal transmitted to the power line 12 by the transmission unit 141 and measures the impedance of the power line 12 the receiving unit 142 (receiving means) for obtaining, on metrology signal acquired by the receiving section 142, includes a, a CPU 144 (detecting means) for detecting whether the signal is included in a specific frequency f ₀ Yes. The variable impedance device 15 generates a predetermined voltage based on an electromotive force induced in the transformer 151 (first transformer) by electromagnetic coupling with a current flowing through the power supply line 12 during the operation of the electric device 13b. In response to a specific frequency f ₀ that is operated by a power supply circuit 152 (power supply means) and a voltage supplied from the power supply circuit 152 and is included in the transmission signal sent to the power supply line 12 by the electrical device detection device 14. The variable impedance circuit 153 and the transformer 154 (impedance changing means) for changing the impedance of the power supply line 12 in a specific manner are provided.

  As described above, according to the first embodiment, the variable impedance device 15 operated by the electromotive force induced by the electromagnetic coupling with the current flowing through the power supply line 12 during the operation of the electric device 13b allows the power supply of the electric device 13b. There is no need to obtain operating power directly. Therefore, it is possible to determine the operation of the electrical device subject to motion detection with a simple configuration without requiring electrical wiring or other electrical work by a specialized electrician. Moreover, since it has a learning function that measures in advance the impedance change of the power supply line when the motion detection target electrical device is stopped, the operation of the motion detection target electrical device can be detected more reliably.

In addition, the variable impedance device 15 according to the first embodiment includes a transformer 151 (first transformer) electromagnetically coupled to any one of the two power lines 12, and any one of the two power lines 12. A transformer 154 (second transformer) that electromagnetically couples, and is configured to engage with the power supply line 12 in a non-contact manner.
Therefore, it is possible to determine the operation of the motion detection target electrical device with a simple configuration without requiring wiring work.

  Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 8 is a diagram illustrating an internal circuit of the variable impedance circuit 153 that changes the impedance of the power supply line 12 as in the first embodiment. In addition, about the same thing as the structure of the variable impedance apparatus 15 of 1st Embodiment shown in FIG. 3, it represents with the same code | symbol and the overlapping description is abbreviate | omitted.

The variable impedance circuit 153 in FIG. 8 is a resonance circuit. When a DC voltage is supplied from the power supply circuit 152, a switch 155 such as a relay or an analog switch is turned on, and a transmission signal is generated by the capacitor C of the internal capacitor 156 and the inductance L of the transformer 154 (second transformer). Resonates at a specific frequency f ₀ included in the. Therefore, the resonance frequency f ₀ is expressed by the following formula 1.

  The injection signal in FIG. 9A is the same as the injection signal in FIG. 4A in the first embodiment. However, the resonance circuit constituting the variable impedance circuit 153 of the variable impedance device 15 in the second embodiment has the impedance characteristics shown in FIG. Therefore, the measurement signal when there is no inductance component and capacitance component in the power supply line 12 has a signal waveform without distortion shown in FIG.

  Also in the second embodiment, similarly to the first embodiment, if the learning function of the electric device detection device 14 cancels out the impedance characteristic of the power supply line 12 when the electric device 13b is stopped by the arithmetic processing of the CPU 144, the diagram is obtained. The signal waveform of the resonance characteristic shown in 9 (b) is obtained.

  Also in the second embodiment, the variable impedance device 15 includes the transformer 151 (first transformer) electromagnetically coupled to any one of the two power lines 12 and any one of the two power lines 12. It has a transformer 154 (second transformer) that is electromagnetically coupled to the book, and is configured to engage with the power line 12 in a non-contact manner.

  In this way, it is not necessary to directly obtain operating power from the power source of the electrical device 13b by the variable impedance device 15 that operates by electromotive force induced by electromagnetic coupling with the current flowing through the power line 12 during operation of the electrical device 13b. . Therefore, it is possible to determine the operation of the electrical device subject to motion detection with a simple configuration.

Further, the variable impedance device 15 having the resonance circuit 153 shown in FIG. 8 also has a frequency at which the variable impedance circuit 153 causes an impedance change when viewed from the electrical device detection device 14, as in the case of having the filter circuit shown in FIG. 3. including f ₀ to generate a signal in a specific bandwidth (signal FIG. 4 (b)), changing the specific aspects of the impedance of the power line 12 through the transformer 154 is a predetermined impedance.
Therefore, since it has a learning function for measuring in advance the change in the impedance of the power supply line when the motion detection target electrical device is stopped, the operation of the motion detection target electrical device can be detected more reliably.

Next, a third embodiment of the present invention will be described with reference to FIG.
FIG. 10 is a diagram illustrating a configuration of the variable impedance device 15 according to the third embodiment. In addition, about the same thing as the structure of the variable impedance apparatus 15 of 1st Embodiment shown in FIG. 3, it represents with the same code | symbol and the overlapping description is abbreviate | omitted.

  In FIG. 10, the power plug 157 of the variable impedance device 15 is detachably inserted into a power receptacle 121 (for example, an outlet such as a wall) provided on the power line 12. The power receptacle 158 of the variable impedance device 15 is detachably inserted into a power plug 13b1 of a television receiver which is an electric device 13b.

  In the variable impedance device 15 of FIG. 10 as well, the transformer 151 is a current transformer having a core material such as ferrite, and one winding on the primary side is provided around one of the two power lines 12. It is a 1 to N transformer that loops and has N windings on the secondary side connected to the power supply circuit 152. That is, the transformer 151 is an electromagnetic coupling unit that amplifies the electromotive force induced on the primary side by N times and supplies it to the power circuit 152 by electromagnetic coupling with the current flowing through the power line 12 during the operation of the electric device 13b. Configure. However, the variable impedance circuit 153 is directly connected to the power supply line 12 passing through the variable impedance device 15.

The variable impedance device 15 has a structure that can be detachably mounted between the power line 12 and the electric device 13b by a plug 157 and a receptacle 158.
That is, it is not necessary to directly obtain the operating power from the power source of the electrical device 13b by the variable impedance device 15 that is operated by the electromotive force induced by the electromagnetic coupling with the current flowing through the power line 12 during the operation of the electrical device 13b. Therefore, it is possible to determine the operation of the electrical device subject to motion detection with a simple configuration.

Next, a fourth embodiment of the present invention will be described. Since the system configuration in the fourth embodiment is the same as the system configuration in the first embodiment, redundant description is omitted.
FIG. 11 is a diagram showing the injection signal in the electrical device detection device 14, the resonance characteristics of the variable impedance device 15, and the measurement signal on the time axis. In response to the injection signal (transmission signal) in FIG. 11 (a) which is a pulse signal of the step function, the measurement signal (reception signal) in FIG. 11 (b) is the power supply line even when the electrical device 13b is stopped. The waveform is distorted by the impedance characteristic of 12. When the electric device 13b becomes operational state, as shown in FIG. 11 (c), the impedance specific to the variable impedance device 15 is applied to the power supply line 12, the waveform portions p ₀ which raised under the influence of the resonant frequency Arise. The delay time Td until the waveform portion p ₀ is generated is proportional to the resonance frequency of the variable impedance device 15. Also in this case, the presence / absence of the operation of the electric device 13b can be detected by measuring the delay time Td.
Therefore, it is possible to more reliably detect the operation of the operation detection target electrical device.

  Next, a fifth embodiment of the present invention will be described with reference to FIGS. In the first to fourth embodiments, one electric device 13b is used as an electric device for detecting the presence / absence of an operation. However, in the fifth embodiment, a configuration for detecting the presence / absence of an operation for each of a plurality of electric devices is adopted. It has become.

FIG. 12 is a diagram illustrating a measurement signal (b) with respect to an injection signal (a) in n electrical devices (electric device 1, electrical device 2,..., Electrical device n). As shown in FIG. 12, by assigning different frequencies f ₀₁ , f ₀₂ ,..., F _0n to each electric device, it is possible to detect the presence or absence of the operation of each electric device. Note that the configuration and operation in this case are the same as those in the first embodiment described above, and a description thereof will be omitted. FIG. 13 is a diagram illustrating a relationship between IDs of n electrical devices and assigned frequencies.

That is, in the fifth embodiment, the electrical device detection device 14 has different frequencies (f ₀₁ , f ₀₂ ,..., F _0n ) that are uniquely assigned to each of a plurality (n) of electrical devices. Is transmitted to the power supply line 12. In this case, the predetermined time and the predetermined number shown in FIG. 7 are set according to each electric device.

  As described above, in the fifth embodiment, the variable impedance device corresponding to each electric device is operated by the electromotive force induced by electromagnetic coupling with the current flowing through the power line 12 during the operation of the corresponding electric device. Therefore, it is not necessary to obtain operating power directly from the power supply of each electrical device. Therefore, even when a plurality of electrical devices are to be detected, it is possible to determine the operation of the motion detection target electrical device with a simple configuration. In addition, it is possible to more reliably detect the operation of the operation detection target electrical device.

  In each of the above-described embodiments, the electrical apparatus operation detection system and the apparatus used therefor have been described, but the present invention is not limited to the system and apparatus invention. As is apparent from the flowchart of the detection operation executed by the CPU 144 as shown in FIG. 7, the present invention constitutes the invention of the electrical device operation detection method. Further, as described above, the electrical equipment operation detection processing program for realizing the electrical equipment operation detection method may be stored in the ROM 145 in advance or stored in a memory chip that can be attached to and detached from the electrical equipment detection device 14. Alternatively, it can be installed from the outside by the communication function of the CPU 144. Therefore, the present invention constitutes a program invention.

  It should be noted that the present invention can be variously modified and modified 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.

  The electrical equipment operation detection system, electrical equipment operation detection method, and apparatus and program used therefor according to the present invention are suitable for automatically confirming the safety of an elderly person living alone.

DESCRIPTION OF SYMBOLS 1 Electrical equipment operation | movement detection system 12 Power supply line 13 Electrical equipment 14 Electrical equipment detection apparatus 15 Variable impedance apparatus 141 Transmission part 142 Reception part 144 CPU
151, 154 Transformer 152 Power supply circuit 153 Variable impedance circuit

Claims (12)

An electrical equipment operation detection system comprising an electrical equipment detection device for detecting the presence or absence of operation of electrical equipment connected to an indoor power line, and a variable impedance device connected to the electrical equipment,
The electrical equipment detection device is
A transmission means for transmitting a transmission signal whose frequency continuously changes in a specific bandwidth including at least one specific frequency to the power supply line; and a transmission signal transmitted to the power supply line by the transmission means. Receiving means for acquiring a measurement signal for measuring the impedance of the power line, and detection means for detecting whether or not the signal of the specific frequency is included in the measurement signal acquired by the receiving means,
The variable impedance device is:
A power supply means for generating a predetermined voltage based on an electromotive force induced by electromagnetic coupling with a current flowing through the power supply line during operation of the electrical device; and the power supply means operates by the voltage supplied from the power supply means, Impedance changing means for changing the impedance of the power supply line in response to the specific frequency included in the transmission signal sent to the power supply line by the electrical device detection device;
An electrical equipment operation detection system characterized by the above. The electrical device detection device sends a transmission signal including different frequencies uniquely assigned to each of a plurality of electrical devices to the power line.
The electrical equipment operation | movement detection system of Claim 1 characterized by the above-mentioned. An electrical device detection device used in an electrical device operation detection system for detecting the presence or absence of operation of an electrical device connected to an indoor power line,
Transmitting means for transmitting a transmission signal whose frequency continuously changes in a specific bandwidth including at least one specific frequency to the power supply line;
Receiving means for receiving a transmission signal transmitted to the power line by the transmitting means and obtaining a measurement signal for measuring the impedance of the power line;
The measurement signal acquired by the receiving means includes a signal of the specific frequency generated by a variable impedance means that is activated by an electromotive force induced by electromagnetic coupling with a current flowing through the power line during operation of the electrical device. Detecting means for detecting whether or not included,
An electrical equipment detection device characterized by the above. The transmission means transmits a transmission signal including a different frequency uniquely assigned to each of a plurality of electrical devices.
The electrical equipment detection apparatus according to claim 3. A variable impedance device for use in an electrical equipment operation detection system for detecting the presence or absence of an electrical equipment connected to an indoor power line,
Power supply means for generating a predetermined voltage based on an electromotive force induced by electromagnetic coupling with a current flowing through the power supply line during operation of the electrical device;
Operates with the voltage supplied from the power supply means, and makes the impedance of the power supply line unique in response to a specific frequency included in a transmission signal superimposed on the voltage supplied to the electrical equipment in the power supply line Impedance changing means for changing to various aspects,
A variable impedance device characterized by that. The impedance changing means is a filter circuit whose impedance decreases in response to the specific frequency.
The variable impedance device according to claim 5, wherein: The impedance changing means is a resonance circuit whose impedance rises in response to the specific frequency.
The variable impedance device according to claim 5, wherein: The impedance changing means changes the impedance of the power supply line in a unique manner by electromagnetic coupling;
The variable impedance device according to claim 5, wherein the variable impedance device is provided. The variable impedance device includes a plug connected to the power supply line and a receptacle connected to the electric device.
The variable impedance device according to claim 5, wherein the variable impedance device is provided. The variable impedance device includes a first transformer that is electromagnetically coupled to one of the two power lines,
A second transformer electromagnetically coupled to any one of the two power lines of the power line;
And has a structure that engages with the power line in a non-contact manner.
The variable impedance device according to claim 5, wherein the variable impedance device is provided. An electrical device operation detection method for detecting presence or absence of operation of an electrical device connected to an indoor power line,
The transmission means sends a transmission signal whose frequency continuously changes in a specific bandwidth including at least one specific frequency to the power line,
The receiving means receives the transmission signal transmitted to the power line by the transmitting means and obtains a measurement signal for measuring the impedance of the power line,
The specific impedance generated by the variable impedance means, wherein the detection means is activated by an electromotive force induced by electromagnetic coupling with a current flowing through the power supply line during operation of the electrical device in the measurement signal acquired by the reception means. Detect if frequency signal is included,
The impedance changing means changes the impedance of the power supply line in a specific manner in response to the specific frequency included in the transmission signal sent to the power supply line during the operation of the electrical device.
An electrical equipment operation detection method characterized by the above. A program for detecting the presence or absence of operation of an electrical device connected to an indoor power line,
Sending a transmission signal whose frequency continuously changes in a specific bandwidth including at least one specific frequency to the power line;
Receiving a transmission signal in the power line to obtain a measurement signal for measuring the impedance of the power line; and
Whether the acquired measurement signal includes a signal of the specific frequency generated by variable impedance means that operates by electromotive force induced by electromagnetic coupling with current flowing through the power line during operation of the electrical device Detecting, or causing a computer to execute,
A program characterized by that.

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