JP2002162424A - Detector for apparatus conditions - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus conditions detector for automatic detection of the usage conditions of a connected apparatus, based on electric power information including voltage, current, or power of the connected apparatus, or their changes with time. SOLUTION: The use conditions of the connected apparatus can be found from electrical energy used, by measuring changes in the electric energy with time and analyzing the measured data. Furthermore, the user conditions of the connected apparatus can be detected from electrical energy by using a relational expression between the analyzed use conditions and the electrical energy, and thus the conditions of an unknown connected apparatus can be detected stably.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a device state detecting apparatus for automatically detecting the use state of a connected device from voltage, current, power, or power information including a time change of the connected device. .

[0002]

2. Description of the Related Art A conventional technique will be described.

First, the configuration of the conventional technique will be described with reference to FIG.

[0004] In FIG. 10, reference numeral 1 denotes an electric energy measuring unit which measures the electric energy supplied from the power supply 15 to the connected device 16 and outputs the electric energy to the use state determining means 17.

The use state determination means 17 receives the power amount measured by the power amount measurement means 1 and the power threshold value stored in the power threshold value storage means 18 as inputs, and calculates the power amount and the magnitude of the power threshold value. And outputs the comparison result as a use state determination signal.

When the use state determination signal from the use state determination unit 17 is input, the use state notification unit 19 notifies the use / non-use of the connected device as the connection device use notification.

Next, the operation of the conventional technique will be described with reference to FIG.

FIG. 11 shows the time t on the horizontal axis and the electric energy P on the vertical axis.
FIG. 5 is a diagram showing a change over time in the amount of power of a connected device, for example, a television. However, the time zone actually used by the television is shown as usage time, and the time zone not used is shown as unused time.

As shown in FIG. 11, when the connected device is in use, the power is equal to or higher than the threshold value Ph (20 W), and when the connected device is not in use, It can be seen that the power is less than the threshold value Ph (20 W).

That is, a threshold value for determining the use state of the connected device can be set in advance, and the use state can be determined based on the magnitude relationship between the amount of power and the threshold value.

The power threshold storage means 18 stores a threshold Ph shown in FIG. 11 as an example. The use state judging means 19 includes the threshold storage means 18 as described above.
Is compared with the power amount P by the power measuring means 1 to determine the use state of the connected device.

In the above conventional invention, a threshold value is set,
The use state of the connected device is determined based on the magnitude relationship between the threshold value and the power amount, and the use state of the connected device can be determined only by measuring the power amount.

[0013]

According to the configuration and operation of the above-mentioned conventional invention, it is possible to measure the electric energy of a connected device without using a use state signal which is an external signal from the connected device as described above. The use state can be determined only by using this.

However, according to the configuration and operation of the above-mentioned conventional invention, it is necessary to measure the amount of power in the unused state and the amount of power in the used state of the connected device and to set the threshold value. Therefore, it is essential for designers and users to measure the power consumption of unknown connected devices in advance.
There is a problem that the state of the connected device cannot be detected. In addition, as described above, it is necessary to measure the power consumption of the connected device and to analyze the relationship between the power consumption and the usage state of the connected device, so that it is troublesome for the designer and the user. There was also.

[0015]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention relates to a method for connecting a connected device to a connected device by using power information including voltage, current, power amount, and time change amount of the connected device. It is intended to provide a device for automatically detecting the use state of the device.

[0016] In addition, the use state of the device (two states, ie, the unused state and the use state in the case of a TV) is detected by measuring the electric energy of the connected apparatus for a predetermined time or more.

As shown in FIG. 11, when there is no information about the connected device, it is difficult to determine the use state from the power amount from a macro viewpoint, but the power amount changes over a certain period of time (FIG. 11). By analyzing the power consumption, it is possible to easily know the power consumption when the connected device is in the unused state and the power consumption when the connected device is in the used state. For example, in the case of FIG. 11, when the power value P11 is the smallest among the stable power amounts P9, P10, and P11, the connected device is in the unused state. Otherwise, the connected device is in the used state. It can be seen that it is.

Thus, by measuring the time change of the electric energy and analyzing the measured data, the use state of the connected device can be known from the electric energy used.

Further, the use state of the connected device can be detected based on the electric energy by using the analyzed relational expression between each use state and the electric energy.

In the configuration and operation of the present invention, since the relational expression between the use state of the connected device and the electric energy is automatically created, the state of the connected device can be detected stably with respect to the unknown connected device. .

Further, since it is not necessary for the designer and the user to measure and analyze the power consumption, the labor for the designer and the user can be saved.

[0022]

According to the first aspect of the present invention, the use state of a connected device is automatically detected based on power information including a voltage, a current, a power amount, or a time change amount of the connected device. .

According to the present invention, the use state of the connected device can be known from the amount of power consumption by measuring the time change of the power amount and analyzing the measured data. In addition, the use state of the connected device can be detected based on the amount of power by using the analyzed relational expression between each use state and the amount of power.

According to the configuration and operation of the above invention, the relational expression between the use state of the connected equipment and the electric energy is automatically created.
It is possible to stably detect the status of a connected device for an unknown connected device.

Further, since it is not necessary for the designer and the user to measure and analyze the power consumption, the designer and the user can save time and effort.

According to a second aspect of the present invention, the presence / absence of use of a connected device is automatically detected based on power information including a voltage, a current, a power amount, or a time change amount of the connected device.

According to the present invention, it is possible to know whether or not a connected device is used based on the amount of power consumption by measuring the time change of the power amount and analyzing the measured data. In addition, by using the analyzed relational expression between each usage state and the amount of power, it is possible to detect the usage of the connected device based on the amount of power.

According to the configuration and operation of the above invention, the relational expression between the use / non-use of the connected device and the electric energy is automatically created.
It is possible to stably detect the status of use of a connected device for an unknown connected device.

Further, since it is not necessary for the designer and the user to measure and analyze the amount of power used, the work of the designer and the user can be saved.

According to a third aspect of the present invention, a function for inputting a power value and outputting a result of a use state of a device is set by the power function determining means, and the measured power value is substituted into the function. This is for determining the use state of the device.

According to the configuration and operation of the present invention, the use state is determined by substituting the power value into the function for outputting the use state, and the use state of the device can be determined only by substituting the function into the function. Therefore, the use state of the connected device can be used for controlling the device in real time.

Further, according to the present invention, the step of setting the function and the step of detecting the state of the device for determining the use state of the device are separate steps. By setting the function setting step and the state detection step to separate steps, after the function is set, the state of the device is detected only by the state detection step without going through the function setting step. Without performing this, it is possible to more quickly detect the state of the device.

According to a fifth aspect of the present invention, the step of setting a function is a preceding step, and the step of detecting the state of the device for determining the use state of the device is a subsequent step. According to the operation, first, after setting a function, the state of the device is detected, so that the state of the device can be detected more accurately without erroneous detection of the state by an incorrect function.

According to a sixth aspect of the present invention, a use state of a device is determined based on a magnitude relationship between an input power value and a threshold value set by a threshold value determining means. At the time of state detection, a function using only a magnitude relationship between the power value and the threshold value, which is a simple expression, is used, so that the use state of the device can be determined more quickly.

According to a seventh aspect of the present invention, the standby power value is determined based on the power information, and the threshold value is determined based on the standby power value. Since the threshold value is determined only by the standby power value that is the power value in the unused state, the use state of the device can be determined more quickly for all the models.

According to the invention of claim 8, when the threshold value is determined from the standby power value, the threshold value is determined by adding the constant value stored in the threshold constant storage means to the standby power value. According to the configuration and operation of the present invention, the threshold value is obtained by adding a constant value, which is a simple formula, to the standby power amount that can be easily obtained.
The use state of the device can be detected more quickly and accurately for all models.

According to a ninth aspect of the present invention, a constant value to be added when determining a threshold value for determining a use state is changed by a connected device. Since a threshold can be set, it is possible to respond to situations such as model change, and
The use state of the device can be detected more accurately.

According to a tenth aspect of the present invention, a threshold value for determining a use state is set between a standby power value and a minimum value of a power value when the connected device operates. According to the operation, since the threshold value is determined from the standby power value and the minimum value of the power value that can be obtained from the time change of the power value of all the models, even if there is no information on the connected device, the threshold is determined according to each model. The threshold can be set automatically.

[0039]

An embodiment of the present invention will be described.

(Embodiment 1) A first embodiment will be described.

First, the first embodiment will be described with reference to FIG.

Numeral 1 denotes an electric energy measuring means, which measures the electric energy from the power supply 15 to the connected device 16 and determines an electric power function determining means 2
And outputs the electric energy to the device state determining means 3.

The power function determining means 2 includes the power amount measuring means 1
Determine the power function indicating the relationship between the state of the connected device and the power amount from the time change of the power amount and the power amount measured by,
The determined function is output to the device state determining means 3 and stored.

The device state determining means 3 determines the device state by substituting the power amount determined by the power function determining means 2 with the power amount by the power amount measuring means 1.

The device status notifying means 4 notifies the device status determined by the device status determining means 3.

Further, reference numeral 5 denotes a process order storage means;
Is a process switching means.

The process switching means 6 is arranged so that the order of the steps stored in the process order storage means 5 is determined by the power function determining means 2, the preceding step is performed by the power function determining means 2, and the subsequent step is performed by the equipment state determining means 3. 2 is operated, and upon receiving a process end signal from the power function determining means 2, the device state determining means 3 is operated.

Next, the configuration of the device state function setting means 2 will be described in more detail with reference to FIG.

As shown in FIG. 2, reference numeral 7 denotes the connection device 1 by the user.
6 is a connected device input means for inputting “6”. The threshold value constant determining means 8 stores a threshold value constant corresponding to the connected device 16, and determines the threshold value constant by the connected device 16 inputted by the connected device input means 7. Output to the threshold value determining means 9.

Reference numeral 10 denotes standby power determining means for determining the standby power of the connected device 16 from the power measured by the power measuring means 1.

The threshold value deciding means 9 is composed of the threshold value constant and the standby power deciding means 10
, And determines a threshold value that determines the use state of the connected device 16.

The configuration of the device state determining means 3 will be described in detail with reference to FIG.

Reference numeral 11 denotes a threshold value determining means for storing the threshold value determined by the threshold value determining means 9. Also,
The power value comparing means 12 compares the threshold value by the threshold value determining means 11 with the power amount by the power amount measuring means 1,
The state of the connected device 16 is determined based on the comparison result.

Next, the operation of the first embodiment will be described with reference to FIGS.
An example will be described using FIG.

FIG. 4 is a diagram showing the time change of the illumination power P, with the horizontal axis representing the measurement time t and the vertical axis representing the measured power P. At the same time, the usage state of the lighting is also shown.

FIG. 4 shows that the electric energy P is different between the standby state in which the user does not actually use the connected device 16 and the state in which the user is using it. It can also be seen that the standby power amount Ps, which is the power amount in the standby state, shows the smallest value P4 among the power amounts P1, P2, P3, and P4 at the stable point shown in FIG.

Therefore, as described above, when the time variation of the electric energy P for a sufficiently long time is given, the electric energy at the stable point is measured, and the smallest electric energy is set as the standby electric energy. , A state indicating the value can be set to a standby state.

The standby power determining means 10 stores a relational expression between the power amount P and the time t by the power amount measuring means 1. Then, the standby power Ps is obtained by the above-described method of obtaining the minimum power at the stable point, and the standby power Ps is output to the threshold value determining means 9.

Next, the operation of the threshold value constant storage means 8 and the threshold value determination means 9 will be described with reference to FIGS.

FIG. 5 and FIG. 6 are diagrams showing the time change of the electric energy with the horizontal axis representing time t and the vertical axis representing the electric energy P. However, FIG. 5 shows the change over time of the power amount of the lighting in FIG.
Shows the time change of the electric energy of the television.

Further, when the user uses the connected device, the amount of power during use and the amount of standby power in the standby state, and
The usage state at each electric energy is shown at the same time.

As can be easily understood from FIGS. 5 and 6, it can be seen that the difference between the electric energy at the time of using the device and the standby electric energy is larger in the TV than in the lighting.

In the method of determining the use state of the connected device based on the magnitude of the set threshold value Ph and the amount of power P, the threshold value Ph is determined so as to satisfy the following condition.

The threshold value Ph must be larger than the standby power Ps by a certain amount or more because the use state of the connected device is determined stably even when the power supply voltage and the current of the standby power change. . However, the threshold value Ph must be smaller than the minimum power value (P3 in FIG. 4) when the connected device is used.

Therefore, the condition for determining the threshold value Ph is shown in FIG.
According to the graph of the time change of the power consumption of the lighting and the television in FIG. 6, the threshold value Ph is determined based on the standby power amount Ps, and the relational expression between the threshold value Ph and the standby power Ps is as follows. It can be seen that it depends on the connected device.

Therefore, the threshold value Ph is determined by Ph = Ps + Pα. Here, Ps is standby power, and Pα is a constant determined by the connected device.

In the above description, the relationship between the standby power Ps and the threshold value Ph is an addition formula, but the point is that it is a method that satisfies the condition for determining the threshold value Ph. Any method may be used as long as it determines Ph.

The threshold constant storage means 8 stores threshold constants Pα of various connected devices, and stores the threshold constants P based on the connected device information from the connected device input means 7.
α is determined and output to the threshold value determining means 9.

The threshold value deciding means 9 calculates the threshold value Ph from the addition formula described as an example based on the threshold value constant Pα by the threshold value constant storing means 8 and the standby power amount Ps by the standby power determining means 10. To determine.

The threshold value determining means 9 executes a series of threshold value determining steps by receiving a signal to be executed from the process switching means 6. When the threshold value is determined, a power function determination signal is output to the process switching means 6 to notify the end of the process.

Next, the power value comparing means 12 will be described with reference to FIG.

FIG. 7 is a diagram showing the electric energy of the connected device and the state of the connected device. Here, the horizontal axis represents the measurement time t, and the vertical axis represents the power amount P. Also, at the same time, the time change of the electric energy of the connected device and the threshold value determining means 9 determine
The threshold value Ph stored in the threshold value storage means 11 is also shown.

As shown in FIG. 7, the power amount P is compared with the threshold value Ph. If the power amount P is larger, it is determined that the connected device is in use. If the power amount P is smaller, the connection device is connected. Assuming that the device is unused, the use / unused state of the connected device is determined based on the magnitude of the electric energy P.

In the above method, the method of detecting the use / unused state of the connected device is determined based on the magnitude relationship between the power amount P and the threshold value Ph. Any method such as multiplication or subtraction may be used as long as the use state of the connected device can be detected using P.

The power value comparing means 12 receives the signal to be executed from the process switching means 6, and thereby, the threshold value Ph stored in the threshold value storing means 11 and the electric power P Are compared to detect whether the connected device is in use or not.

According to the first embodiment of the present invention, the use state of a connected device is automatically detected based on power information including the voltage, current, power amount, and time change amount of the connected device. It is assumed that.

By measuring the time change of the electric energy and analyzing the measured data, it is possible to know the use state of the connected device by the electric energy used. In addition, the use state of the connected device can be detected based on the amount of power by using the analyzed relational expression between each use state and the amount of power.

According to the above configuration and operation, the relational expression between the use state of the connected device and the electric energy is automatically created, so that the state of the connected device can be detected stably with respect to the unknown connected device.

Further, since it is not necessary for the designer and the user to measure and analyze the power consumption, the designer and the user can be saved.

Further, the invention of the first embodiment has a configuration in which the presence / absence of use of a connected device is automatically detected based on power information including a voltage, a current, a power amount and a time change amount of the connected device. Is what you do.

By measuring the time change of the electric energy and analyzing the measured data, it is possible to know whether or not the connected equipment is used based on the electric energy used. In addition, by using the analyzed relational expression between each usage state and the amount of power, it is possible to detect the usage of the connected device based on the amount of power.

According to the configuration and operation of the present invention, the relational expression between the use / non-use of the connected device and the electric energy is automatically created.
It is possible to stably detect the status of use of a connected device for an unknown connected device.

Further, since it is not necessary for the designer and the user to measure and analyze the amount of power used, the work of the designer and the user can be saved.

Further, according to the invention of the first embodiment, a function for inputting a power value and outputting a result of a use state of a device is set by the power function determining means, and the measured power value is substituted into the function. Then, the use state of the device is determined.

According to the above configuration and operation, the use state is determined by substituting the power value into the function that outputs the use state. The use state of the device can be determined only by substituting the function into the function. In addition, the use state of the connected device can be used in real time for controlling the device.

Further, the invention of the first embodiment is configured such that the step of setting a function and the step of detecting the state of the device for determining the use state of the device are separate steps.
According to the above configuration and operation, by setting the function setting step and the state detecting step to separate steps, after the function is set, the state of the device is detected only by the state detecting step without passing through the function setting step. In addition, the state of the device can be detected more quickly without performing unnecessary steps.

Further, the invention of the first embodiment has a configuration in which the step of setting a function is a preceding step, and the step of detecting the state of the device for determining the use state of the device is a subsequent step. According to the above configuration and operation, first, after setting the function, the state of the device is detected, so that the state of the device can be detected more accurately without erroneous detection of the state by an incorrect function.

Further, the invention of the first embodiment determines the use state of the device based on the magnitude relationship between the power value to be input and the threshold value set by the threshold value determination means. According to the configuration and operation, when detecting the status,
Since the function using only the magnitude relationship between the power value and the threshold value, which is a simple expression, is used, it is possible to more quickly determine the use state of the device.

Further, the invention of the first embodiment has a configuration in which the standby power value is determined based on the power information and the threshold value is determined based on the standby power value. Since the threshold value is determined only by the standby power value, which is the power value in the unused state of the device that can be obtained, the usage state of the device can be determined more quickly for all models.

According to the first embodiment of the present invention, the threshold value is determined by adding the constant value stored in the threshold constant storage means to the standby power value when determining the threshold value from the standby power value. According to the above configuration and operation, a threshold value is obtained by adding a constant value, which is a simple equation, to the standby power amount that can be easily obtained.
The use state of the device can be detected more quickly and accurately for all models.

Further, according to the invention of the first embodiment, a constant value to be added when a threshold value for determining a use state is determined is changed by a connected device. Since the corresponding threshold value can be set, it is possible to cope with a situation such as a change of the model, and to more accurately detect the use state of the device.

(Embodiment 2) Next, a second embodiment will be described.

The second embodiment is different from the first embodiment in that
The threshold value determining means 9 is configured to provide a threshold value between the standby power amount and the minimum value of the power value when the connected device operates.

Therefore, the configuration and operation of the second embodiment will be described focusing on the differences between the configuration and operation of the first embodiment, and the other configuration and operation will be the same as those of the first embodiment.

The second embodiment will be described with reference to FIG.

FIG. 8 is a diagram showing the configuration of the power function determining means 2.

In FIG. 8, reference numeral 13 denotes a minimum power determining means, which is a minimum power value among the stable power values when the connected device is operating, and which is a data of the time change of the power value by the power measuring means 1. To decide.

The second threshold value determining means 14 determines the minimum power value by the minimum power determining means 13 and the standby power determining means 10
, The second threshold value is determined and output.

Next, the operation of the second embodiment will be described with reference to FIG.

FIG. 9 is a diagram showing the time change of the electric power of the illumination, with the horizontal axis representing time t and the vertical axis representing the electric energy P. In addition, the amount of power used when the user uses the connected device, the amount of standby power in the standby state, and the use state at each amount of power are simultaneously shown.

Power values P5, P6, P7, P8 shown in FIG.
, The standby power value Ps is the power value P8, and the minimum power value Pmin is the power value P7.

Power value P when connected device is in unused state
Is standby power Ps, and the power value P when the connected device is in use is equal to or more than the minimum power Pmin. Therefore, the use state of the connected device can be detected by providing the second threshold value Ph2 for detecting the use / non-use of the connected device between the standby power value Ps and the minimum power value Pmin (FIG. 9). ).

The invention of the second embodiment has a configuration in which the threshold value for determining the use state is set between the standby power value and the minimum value of the power value when the connected device operates. According to the above configuration and operation, the threshold value is determined from the standby power value that can be obtained from the time change of the power value of all the models and the minimum value of the power value. Can be automatically set in accordance with the threshold value.

[0104]

According to the first aspect of the present invention, the use state of the connected device is automatically detected based on the power information including the voltage, current, power amount, or time change amount of the connected device.

According to the present invention, the use state of the connected device can be known from the power consumption by measuring the time change of the power consumption and analyzing the measured data. In addition, the use state of the connected device can be detected based on the amount of power by using the analyzed relational expression between each use state and the amount of power.

According to the configuration and operation of the present invention, the relational expression between the use state of the connected device and the electric energy is automatically created.
It is possible to stably detect the status of a connected device for an unknown connected device.

Further, since it is not necessary for the designer and the user to measure and analyze the power consumption, the designer and the user can be saved.

According to a second aspect of the present invention, the use or non-use of the connected device is automatically detected based on the power information including the voltage, current, power amount, or time change amount of the connected device.

According to the present invention, it is possible to determine whether or not a connected device is used based on the amount of power consumption by measuring the time change of the power amount and analyzing the measured data. In addition, by using the analyzed relational expression between each usage state and the amount of power, it is possible to detect the usage of the connected device based on the amount of power.

According to the configuration and operation of the above invention, the relational expression between the use / non-use of the connected device and the electric energy is automatically created.
It is possible to stably detect the status of use of a connected device for an unknown connected device.

Further, since it is not necessary for the designer and the user to measure and analyze the amount of power used, the work of the designer and the user can be saved.

According to a third aspect of the present invention, a function for inputting a power value and outputting a result of a use state of a device is set by the power function determining means, and the measured power value is substituted into the function. This is for determining the use state of the device.

According to the configuration and operation of the present invention, the use state is determined by substituting the power value into the function for outputting the use state. The use state of the device can be determined only by substituting the function value into the function. Therefore, the use state of the connected device can be used for controlling the device in real time.

Further, according to the invention of claim 4, the step of setting the function and the step of detecting the state of the device for determining the use state of the device are separate steps. By setting the function setting step and the state detection step to separate steps, after the function is set, the state of the device is detected only by the state detection step without going through the function setting step. Without performing this, it is possible to more quickly detect the state of the device.

The invention according to claim 5 is characterized in that the step of setting a function is a preceding step, and the step of detecting the state of the device for determining the use state of the device is a subsequent step. According to the operation, first, after setting a function, the state of the device is detected, so that the state of the device can be detected more accurately without erroneous detection of the state by an incorrect function.

According to a sixth aspect of the present invention, a use state of a device is determined based on a magnitude relationship between an input power value and a threshold value set by a threshold value determining means. At the time of state detection, a function using only a magnitude relationship between the power value and the threshold value, which is a simple expression, is used, so that the use state of the device can be determined more quickly.

According to a seventh aspect of the present invention, a standby power value is determined based on power information, and a threshold value is determined based on the standby power value. Since the threshold value is determined only by the standby power value that is the power value in the unused state, the use state of the device can be determined more quickly for all the models.

Further, according to the invention of claim 8, when the threshold value is determined from the standby power value, the threshold value is determined by adding the constant value stored in the threshold constant storage means to the standby power value. According to the configuration and operation of the present invention, the threshold value is obtained by adding a constant value, which is a simple formula, to the standby power amount that can be easily obtained.
The use state of the device can be detected more quickly and accurately for all models.

According to a ninth aspect of the present invention, a constant value to be added when determining a threshold value for determining a use state is changed by a connected device. Since a threshold can be set, it is possible to respond to situations such as model change, and
The use state of the device can be detected more accurately.

According to a tenth aspect of the present invention, a threshold value for determining a use state is set between a standby power value and a minimum value of a power value when the connected device operates. According to the operation, since the threshold value is determined from the standby power value and the minimum value of the power value that can be obtained from the time change of the power value of all the models, even if there is no information on the connected device, the threshold is determined according to each model. The threshold can be set automatically.

[Brief description of the drawings]

FIG. 1 is a block diagram of a device state detection device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a power function determining unit.

FIG. 3 is a block diagram showing a configuration of a device state determining unit.

FIG. 4 is a diagram showing a relationship between a measurement time and an amount of power consumption.

FIG. 5 is a diagram showing a change over time in the amount of electric power used for lighting;

FIG. 6 is a diagram showing a change over time in the power consumption of a TV;

FIG. 7 is a diagram showing a relationship between a standby power amount and a threshold value;

FIG. 8 is a block diagram of a power function determining unit according to a second embodiment of the present invention.

FIG. 9 is a diagram showing a relationship between measurement time and power consumption.

FIG. 10 is a block diagram of a device state detection device showing a conventional technique.

FIG. 11 is a diagram showing a relationship between measurement time and power consumption.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 power measurement means 2 power function determination means 3 equipment state determination means 4 equipment state notification means 5 process order storage means 6 process switching means 7 connected equipment input means 8 threshold constant storage means 9 threshold determination means 10 standby power Power determination means 11 Threshold storage means 12 Power value comparison means 13 Minimum power amount determination means 14 Second threshold determination means 15 Power supply 16 Connected equipment 17 Usage state determination means 18 Power threshold storage means 19 Usage state notification means

Continued on the front page (72) Inventor Takaaki Okude 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Keiko Noda 1006 Odaka Kadoma Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (72) Inventor Katsunori Zaizen 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Hirofumi Inui 1006 Kadoma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (10)

[Claims] 1. A device state detecting device for automatically detecting a use state of a connected device based on voltage, current, or electric power amount of a connected device, or power information including a temporal change amount thereof. 2. A device state detection device for automatically detecting whether or not a connected device is used, based on voltage, current, or electric power amount of the connected device, or power information including a time variation thereof. 3. A function for inputting a power value and outputting a result of a use state of a device is set by a power function determination means, and a measured power value is substituted into the function to determine a use state of the device. Equipment status detection device. 4. The apparatus state detecting apparatus according to claim 3, further comprising a step of setting a function and a step of detecting a use state of the apparatus using the function, each of which is a separate step. 5. The apparatus state detecting device according to claim 4, wherein the step of setting the function is a preceding step, and the step of detecting the use state of the apparatus using the function is a subsequent step. 6. The power function determining means is configured to determine a use state of a device based on a magnitude relationship between an input power value and a threshold value set by the threshold value determining means.
6. The apparatus for detecting a state of a device according to any one of claims 1 to 5. 7. The apparatus state detecting device according to claim 6, wherein the threshold value determining means determines a standby power value based on the power information and determines a threshold value based on the standby power value. 8. The threshold value deciding means decides the threshold value by adding a constant value stored in the threshold constant storage means to the standby power value when determining the threshold value from the standby power value. The device state detection device according to claim 7 having a configuration. 9. The device state detecting device according to claim 8, wherein the threshold value constant storage means changes the stored constant value by a connected device. 10. The apparatus according to claim 6, wherein the threshold value determining means sets a threshold value between the standby power value and a minimum power value when the connected device operates. State detection device.