JP2003087159A - Information processing system, information processor, information processing method, recording medium and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a network in a house, which is safe and can be conveniently constructed. SOLUTION: A ±1 data outputting part 72 outputs +1 V or -1 V in accordance with 0 or 1 of data desired to be transmitted. An adding part 73 adds +1 V to an inputted value, and a multiplying part 74 multiplies the inputted value by 0.5. By these processings, data of +1 V and 0 V are supplied to a multiplying part 75. A signal of an alternating current voltage supplied to an electric appliance is also supplied to the multiplying part 65 from a distribution board 11. The multiplying part 75 performs processing for synchronizing the signal of the alternating current voltage, and the synchronized signal is supplied to a resistor 76. An output from the resistor 76 is added to current from the electric appliance and transmitted to another device. The another device extracts data by extracting a modulation current from a modulating part 71 and performs processing corresponding to the data.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an information processing system,
The present invention relates to an information processing apparatus and method, a recording medium, and a program, and more particularly, to an information processing system, an information processing apparatus and method, a recording medium, and a program that are suitable for use when building a network.

[0002]

2. Description of the Related Art In recent years, it has been proposed that the facilities of the network are prepared and that the electrical appliances in the home are connected to build the network. By networking household electrical appliances, it is possible to perform centralized control and exchange data between electrical appliances, and if it is possible to connect to household networks from outside the household. A technology has been proposed that enables electric appliances installed inside the home to be controlled from outside the home.

In order to build a home network,
When electrical appliances are connected by wire, the wires have to be installed all over the home, which is troublesome and unsightly. Therefore, it has been proposed to use a power line to supply electric power to an electric appliance and supply data.

According to this method, a spread spectrum modulation signal or an OFDM (Orthogonal Frequency Division) is externally applied.
Ion Multiplex) Modulation signal is sent to the power line and commercial power line 1
It has been proposed to be transmitted within a range where 00 volts, 50 or 60 hertz is not affected.

[0005]

However, since the power line is designed to most efficiently transmit power with a signal having a frequency of 50 or 60 Hertz, a signal having a frequency other than 50 or 60 Hertz is Depending on the power factor capacitor and the power supply filter, there are problems that the impedance becomes extremely low (for example, 1 ohm or less), or LC resonance occurs with the inductance of the transformer.

Further, when the load is removed, the impedance becomes considerably high (for example, 100 ohms or more). In this way, it is possible to change from low impedance to high impedance depending on the situation. Therefore, in order to achieve communication stability, 90d
There was a problem that a dynamic range of B and a drive circuit that efficiently operates from a very low impedance to a high impedance are required, and a large power amplifier is required.

The present invention has been made in view of such a situation, and by modulating a signal of a power supply voltage or a signal of a current to transmit data, it is possible to simply and easily. The purpose is to ensure that the home network is constructed safely.

[0008]

According to an information processing system of the present invention, a first information processing apparatus has a modulation means for modulating a current based on data to be transmitted, and a current modulated by the modulation means as second information. The second information processing device includes a supply unit that supplies the processing device, and the second information processing device executes an extraction unit that extracts data from the current supplied by the supply unit and a process based on the data extracted by the extraction unit. And means.

A first information processing apparatus according to the present invention is characterized by including a modulation means for modulating the current based on the data and a supply means for supplying the current modulated by the modulation means.

The modulating means includes a resistor, and a current applied to the resistor can be modulated by switching on and off of a voltage applied to the resistor based on data.

The first information processing method of the present invention is characterized by including a modulation step of modulating the current based on the data, and a supply control step of controlling the supply of the current modulated in the processing of the modulation step. .

The program of the first recording medium of the present invention is
It is characterized by including a modulation step of modulating the current based on the data, and a supply control step of controlling the supply of the current modulated by the processing of the modulation step.

A first program of the present invention causes a computer to execute a modulation step of modulating a current based on data and a supply control step of controlling the supply of the current modulated in the processing of the modulation step.

According to another aspect of the present invention, there is provided a second information processing apparatus, wherein an input means for inputting a first current modulated based on data and a second current which is not modulated from the first current input by the input means. The present invention is characterized by including extraction means for extracting data by subtracting an electric current, and execution means for executing processing based on the data extracted by the extraction means.

The extracting means may generate the second current from the voltage applied when another device modulates the data.

A second information processing method according to the present invention is an input control step for controlling input of a first current modulated based on data, and a first input step performed in the processing of the input control step.
The extraction step of extracting the data by subtracting the unmodulated second current from the current of the extraction step, and the execution step of executing the processing based on the data extracted in the processing of the extraction step. To do.

The second recording medium of the present invention is modulated from an input control step for controlling the input of the first current modulated based on the data and the first current input in the processing of the input control step. It is characterized by including an extraction step of extracting data by subtracting a second current which is not stored, and an execution step of executing processing based on the data extracted in the processing of the extraction step.

The second program of the present invention is modulated from an input control step for controlling the input of the first current modulated based on the data, and the first current input in the processing of the input control step. By causing the second current that is not present to be subtracted, the computer is caused to execute an extraction step of extracting data and an execution step of executing processing based on the data extracted in the processing of the extraction step.

In the information processing system of the present invention, the first information processing apparatus modulates the current based on the data to be transmitted and supplies the current to the second information processing apparatus, and the second information processing apparatus is supplied. Data is extracted from the generated current, and processing based on the data is executed.

A first information processing apparatus and method of the present invention,
Also, in the program, the current is modulated based on the data.

A second information processing method and method of the present invention,
In addition, in the program, the second current that is not modulated is subtracted from the first current that is modulated based on the data, the data is extracted, and the processing based on the data is executed.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the configuration of an embodiment of an information processing system to which the present invention is applied. The electric power generated by the power plant is transmitted to the transformer 2 via the distribution line 1. The transformer 2 reduces the voltage supplied to each home, i.e. 100 or 200 volts.

The power supply voltage transformed by the transformer 2 is supplied to each home through the lead-in wire 3. The power supply voltage supplied to each home is first supplied to the distribution board 11.
Normally, it is supplied to the distribution board 11 via a meter or the like,
Here, for convenience of description, the meter and the like will be omitted.

The distribution board 11 is composed of an ampere breaker, an earth leakage breaker, a distribution breaker (all not shown), etc., and is input to an electric light or an outlet installed in each room of the home. The distributed power supply voltage is distributed and supplied. Here, it is assumed that the power supply voltage from the distribution board 11 is supplied to the outlets 12-1 to 12-N.
A modem 13-1 is connected to the outlet 12-1, and a modem 13-2 is connected to the outlet 12-2.

Further, the modem 13-1 includes a refrigerator 14
However, the modem 13-2 has a television receiver 15
Each is connected. Here, the modem 13-1 and the refrigerator 14, the modem 13-2 and the television receiver 15
Although it is assumed that they are provided as separate bodies, for example, the configuration may be such that the modem 13-1 is built in the refrigerator 14.

In the following description, the outlet 12-1
12 to N are simply referred to as outlets 12 when it is not necessary to distinguish them individually. In addition, other devices will be described in the same manner. Further, for convenience of explanation, the refrigerator 14 and the television receiver 15 will be described as an example of the electric appliances, but other electric appliances may be connected to the modem 13.

In this embodiment, the electric appliances connected via the modem 13 can be controlled by the data supplied together with the power supply voltage. FIG. 2 shows a configuration example of a transmitter that transmits the data. When the transmitter 20 shown in FIG. 2 is installed in the distribution board 11 provided in each home, the electric appliances installed in each home can be controlled in each home.

Further, the transmitter 20 shown in FIG.
If it is installed before the distribution board 11 installed in each household of the apartment house such as an apartment, that is, between the transformer 2 and the distribution board 11, it is installed in each household of the apartment house. It is possible to control all appliances at once. In this way, the range of electrical appliances to be controlled differs depending on the place where the transmitter 20 is installed, and the transmitter 20 may be installed at an appropriate place according to the purpose.

The transmitter 20 includes a high voltage output section 21, a low voltage output section 22, a switch 23, and a switch control section 24.
It consists of Normally, the power supply voltage supplied to the home is an AC signal having a practical value of 100 volts. In the description of the present embodiment, the specific value of the voltage is an actual value unless otherwise specified, and the power supply voltage supplied to the home is 100 volts.

The high voltage output section 21 outputs an AC signal having a voltage of 102 V with respect to 100 V.
The low voltage output unit 22 outputs an AC signal having a voltage of 98 volts. Thus, here, the one that outputs a high-voltage AC signal with respect to 100 V is the high-voltage output section 21, and the one that outputs a low-voltage AC signal is the low-voltage output section 22. High voltage output section 21 and low voltage output section 22
Therefore, the AC signals of the respective output voltages are AC signals of 50 or 60 Hertz synchronized with the power supply voltage (that is, a signal of 100 V) supplied to the home.

The voltage value (execution value) of the AC signal output from the high voltage output section 21 and the low voltage output section 22 is
The voltage values are not limited to 102 V and 98 V, respectively, and other voltage values may be used. However, the voltage value of the output AC signal may be any voltage, and is not limited to 102 V and 98 V. The voltage value of the AC signal output from each of the high-voltage output unit 21 and the low-voltage output unit 22 is the power supply voltage supplied to the electric appliance (in this case,
100V) within the range that does not affect, for example ±
It may be set within the range of 5% (hence, 95 to 105 volts).

The AC signal output from the high voltage output section 21 is supplied to the terminal a of the switch 23. The AC signal output from the low-voltage output unit 22 is the terminal b of the switch 23.
Is supplied to. The switch 23 switches the connection between the terminal a and the terminal b under the control of the switch control unit 24. The switch control unit 24 is, for example, a CPU (not shown).
Control of the switch 23 so as to generate data to be transmitted to an electric appliance connected via the modem 13 and to transmit the data by switching the switch 23. I do.

Here, the data transmitted to the electrical equipment is
In the data expressed in the binary system, the 102-volt AC signal output from the high-voltage output unit 21 indicates 1, and the 98-volt AC signal output from the low-voltage output unit 22 indicates 0.

The AC signal having an effective value of 102 V output from the high voltage output unit 21 and the AC signal having an effective value of 98 V output from the low voltage output unit 22 are transmitted by, for example, the transmitter 20 to the transformer. 2 (FIG. 1) and the like, it is possible to provide a tap on the coil on the secondary side and take it out from the tap.

FIG. 3 shows a simplified structure in the case where an AC signal is taken out from the tap. Secondary coil 3
1 is provided with three taps 32-1 to 32-3. At the position where the number of turns of the secondary coil 31 is the smallest as compared with the other taps 32, at the position where the tap 32-1 from which the AC signal having the effective value of 98 V is taken out is at the position where the number of turns is next smaller. A tap 32-2 for extracting an AC signal having an actual value of 100 V and a tap 32-3 for extracting an AC signal having an effective value of 102 V are provided at the winding end position of the secondary coil 31, respectively. .

The AC signal output from the tap 32-1 is output to the terminal a side of the switch 23, and the AC signal output from the tap 32-3 is output to the terminal b side of the switch 23.
Each is supplied. The output from the switch 23 is supplied to the modem 13-1 and the refrigerator 14.

A demodulator for demodulating the data transmitted from the transmitter 20 is incorporated in the modem 13-1. FIG. 4 is a diagram showing an internal configuration example of the demodulation unit. The demodulation unit 50 shown in FIG. 4 includes a voltage output unit 51, an addition unit 52, a multiplication unit 53, and a determination unit 54. The voltage output unit 51 outputs an AC signal having an execution value of 100 V, which is the same as the power supply voltage supplied to the electric appliance, to the addition unit 52. The AC signal may be supplied from the distribution board 11 or may be generated by the voltage output unit 51, separately from the modulation signal from the transmitter 20.

When an AC signal is generated, for example, a PLL (Phase-Lo
By performing phase synchronization with the cked loop) and taking the average value of the modulation signal (therefore, in this case, 100 volts because it is the average value of 98 volt and 102 volt), an AC signal whose actual value is 100 volt is generated. It may be done.

The adder 52 also receives the modulated signal on which the data from the transmitter 20 is added. The adder 52 subtracts the AC signal from the voltage output unit 51 whose execution value is 100 V from the modulated signal from the transmitter 20. Adder 52
The output from is input to the multiplication unit 53. The output from the voltage output unit 51 is also input to the multiplication unit 53. Multiplier 5
3 is provided in order to synchronize the phase of the modulated signal output from the adder 52 with the reproduction carrier.

The output from the multiplication unit 53 is input to the determination unit 54. The determination unit 54 determines the sign of the output (modulated signal) from the input multiplication unit 53. That is, when it is positive, it is determined that the transmitted data is 1, and when it is negative, it is determined that the transmitted data is 0. By making such a determination, the binary data transmitted from the transmitter 20 can be demodulated.

Based on the data demodulated by the demodulation unit 50, the corresponding processing is executed in the electric appliance connected to the modem 13 including the demodulation unit 50. For example, in an emergency, processing such as displaying the emergency information on the television receiver 15 is executed.

In this way, the data is transmitted on the power supply voltage supplied to the electric appliance to be controlled and demodulated, in other words, two terminals having different voltages are provided, and one of them is provided. By making the data of 1 and the other 0 correspond to the data of the power line, and modulating at high frequency by switching the connection between the two terminals, and processing the modulated signal at the receiving side. For example, as compared with the method of injecting electric power using an active element, it is possible to suppress damage to electric appliances and provide a safe network.

Next, the case of transmitting data from the electric appliance side will be described. When transmitting data from the electric appliance side, the modulation unit is incorporated in the modem 13. FIG. 5 is a diagram showing a configuration example of the modulator 71 incorporated in the modem 13. The modulator 71 shown in FIG. 5 is a ± 1 data output unit 7
2, an adder 73, multipliers 74 and 75, and a resistor 76.

The ± 1 data output unit 72, based on an instruction from a device (not shown) that generates data to be transmitted,
When the data to be transmitted is 0, -1 is output, and when the data to be transmitted is 1, 1 is output. This -1 or 1
The unit of can be a volt. That is, ± 1
The data output unit 72 outputs a +1 volt or −1 volt signal to the addition unit 73 depending on the data to be transmitted.

The adder 73 adds 1 volt to the input signal. By this processing, the adder 73 outputs a signal of 0 volt or 2 volt to the multiplier 74. The multiplying unit 74 adds 0.
Multiply by 5. As a result, the multiplication unit 74 outputs a signal of 0 volt or 1 volt to the multiplication unit 75.

An AC signal with an execution value of 100 V, which is normally supplied to an electric appliance, from the distribution board 11 is also input to the multiplication unit 75. The multiplication unit 75 multiplies the 0 or 1 volt signal from the multiplication unit 74 by the input AC signal as well. The multiplier 75 always outputs 0 volt when multiplied by 0, and outputs the voltage value of the AC signal at that time when multiplied by 1. That is, ± 1 output unit 72
The multiplying unit 75 also has a role of a switch and controls ON / OFF of the AC signal.

The output from the multiplier 75 is received by the receiver 80 as shown in FIG. 7 via the resistor 76. Resistance 7
By passing through 6, the current is modulated as a whole of the modulator 71 (hereinafter, this current is appropriately referred to as a modulation current). The modulator 71 is built in the modem 13, but as shown in FIG.
Is connected in parallel to the electrical appliance (refrigerator 14 in FIG. 3) that is the control target.

When the receiver 80 is connected to the position shown in FIG. 6, the receiver 80 has a modulation current modulated by the modem 13-1 and a current output from the refrigerator 14 (flowing through the refrigerator 14). A combined current of (current) (hereinafter, appropriately referred to as load current) is input. The combined current is a combination of the load current and the modulation current, but the load current is basically considered to be constant in the case of the load in this case, so if the modulation current is not combined, The current depends on the AC voltage applied to the refrigerator 14.

Since the load current is a current that depends on the AC voltage, it is easy to determine its magnitude. Therefore, the magnitude of the modulation current can be easily calculated by subtracting the load current that can be easily obtained from the combined current, so that the data modulated by the modulator 71 can be extracted.

FIG. 7 is a diagram showing a configuration example of the receiver 80. The receiver 80 shown in FIG. 7 includes resistors 81 and 86, adders 82 and 84, a multiplier 83, a signal output unit 85, and a multiplier 8.
7 and a determination unit 88. Resistance 81
Is applied with an AC voltage having a working value of 100 volts.
Then, the current as the output from the resistor 81 to which the AC voltage is applied is supplied to the adding unit 82.

The resistance 81 has a resistance value equivalent to the resistance of an electric appliance (in this case, the refrigerator 14, the television receiver 15, etc.), and the resistance 81 outputs a current output from the electric appliance. That is, the value is equivalent to the load current.

The combined current from the modem 13 is also input to the adder 82. The addition unit 82 subtracts the current output from the resistor 81 from the input combined current. Resistance 81
Since the current output from the load current is the load current, the addition unit 8
By the process of 2, the load current is subtracted from the combined current, and as a result, the adder 82 outputs the modulated current.

The modulation current output from the adder 82 is input to the multiplier 83. The current output from the resistor 81 is also input to the multiplication unit 83. The synchronized signal is output by the processing by the multiplication unit 83.

On the other hand, the signal output unit 85, the resistor 86, and the multiplication unit 87 calculate the threshold current value of the modulation current. This threshold current value is the modulation current,
That is, it is a value used for determining 0 or 1 of the data transmitted from the modem 13. Data can be calculated by subtracting this threshold current value from the modulation current output from the multiplication unit 83. The addition unit 84 executes such subtraction processing.

The judging section 88 judges that the data from the modem 13 is 0 when the value of the signal output from the adding section 84 is 0 or less, and when it is 0 or more, the modem 1
The data from 3 is determined to be 1. Judgment unit 88
May output -1 volt when it is determined to be 0, and outputs 1 volt when it is determined to be 1, based on the result of the determination. Judgment unit 88
The output (data) is processed by a CPU (not shown) or the like, whereby a predetermined process is executed.

For example, the modem 13-1 connected to the refrigerator 14 transmits data indicating the contents of the refrigerator 14 to the receiver 80, and the receiver 80 further gives an instruction to the transmitter 20 to receive the data. The transmitted data is transmitted to the modem 13-2 connected to the television receiver 15, and the processing is performed by the modem 13-2.
Information about the contents of the refrigerator 14 is displayed on the television receiver 15.

In this way, from the electric appliances, the modulator 7
By transmitting the data by modulating the current by 1 and demodulating the data by the receiver 80, it is possible to prevent the electric appliances from being damaged, for example, as compared with the method of injecting the power by using the active element. It is possible to control and provide a secure network.

Next, in this way, the data transmitter 2
Signals actually transmitted and received when 0 is transmitted, demodulation is performed by the demodulation unit 50, modulation is performed by the modulation unit 71, and reception is performed by the receiver 80 will be described. However, the waveforms of the signals shown below are examples, and the waveforms are not limited to the waveforms. FIG. 8 is an observation result displayed on the display 61 of the device when the signal output from the transmitter 20 shown in FIG. 2 is observed using a device capable of observing a waveform such as an oscilloscope. FIG. The observation result shown in FIG. 8 is a signal output from the switch 23.

The peaks and valleys are not smooth and are uneven, which means that the data is on this part. On the contrary, it shows that the smooth part has no data. As will be further described with reference to FIG. 9, in the present embodiment, an execution value output by the high-voltage output unit 21 in addition to an AC signal whose execution value is normally supplied to an electric appliance as a power supply voltage is 100 V. There is an AC signal of 102 V and an AC signal having an effective value of 98 V output by the low voltage output unit 22.

The AC signal of 102 V and the AC signal of 98 V are output by the switch 23 being switched according to the data supplied to the electric appliance. When the switch 23 is switched, the AC signal is output. The signal is
This results in being output instead of the 100-volt AC signal, and a signal having unevenness is output as shown by the thick line in the figure and like the peaks or valleys in FIG.

The AC signals supplied to the appliances of the refrigerator 14 and the television receiver 15 are the signals as shown in FIG. 8 when the voltages applied to the appliances are measured and the waveforms are observed. Becomes That is, the AC signal supplied to the electric appliance and the signal output from the transmitter 20 have the same waveform.

Next, the signals in the modulator 71 shown in FIG. 5 will be described. FIG. 10 shows the ± 1 data output unit 72.
This is an observation of the waveform of the signal output from. Figure 1
As shown by 0, +1 volt and -1 volt are switched and output corresponding to the data to be transmitted. Figure 11
Is an observation of the waveform of the signal output from the multiplication unit 74 of the modulation unit 71. As shown in FIG. 11, the multiplication unit 7
The data output from 4 is a signal in which 0 or 1 volt is switched.

FIG. 12 shows the observed waveform of the AC signal of the current output from the modulator 71. When the data is 1, a current having a numerical value other than 0 amperes (current that depends on the AC voltage applied at that time) is output, and when the data is 0, a current of 0 amperes is output. Modulator 7
The output from 1 is a current having a numerical value other than 0 amperes or a current of 0 amperes, and as described above, the modulator 71
It can be considered that it plays a role of a switch for switching the current on and off. Therefore, for example, it is possible to configure the modulator 71 with a switch and a resistor.

FIG. 13 is an observation of the waveform of the signal processed by the receiver 80. The waveform shown in FIG. 13 is an AC signal of the current output from the adder 82 of the receiver 80. The signal output from the addition unit 82 is a signal of the current obtained by subtracting the load current from the combined current of the modulation current containing data and the load current, and thus is a signal representing the modulation current. The extracted signal is a signal that is modulated and transmitted by the modulator 71, that is, a signal as shown in FIG.

Therefore, the signals shown in FIGS. 12 and 13 are
It is preferable that the signals are the same, and if it is confirmed that they are the same, it is possible to confirm that the data is accurately transmitted and received by modulating the AC signal of the current.
Such confirmation will be described later.

FIG. 14 shows the signal output from the adder 84, and FIG. 15 shows the signal output from the multiplier 87 in FIG.
Reference numerals 6 denote signals output from the multiplication unit 83, respectively. The signal output from the adder 84 shown in FIG. 14 is
The signal shown in FIG. 15 is subtracted from the signal shown in FIG. Using the signal shown in FIG. 14, the determination unit 88
Determines the code and, based on the result, demodulates the transmitted data as described above.

In FIG. 17, in order to compare the transmitted data with the demodulated data, the transmitter 20 and the error detector 91-1 to which the signal output from the demodulation section 50 is input are connected and modulated. FIG. 9 is a diagram showing a configuration in the case where an error detector 91-2 to which a signal output from a modulation unit 71 and a signal output from a receiver 80 are input is connected in order to compare received data with received data. First, a signal for comparing transmitted data and demodulated data with the configuration shown in FIG. 17 will be described.

FIG. 18 is a diagram showing a signal of data transmitted from the transmitter 20. That is, the switch control unit 2
4 is a signal supplied to the No. 4. The signal shown in FIG. 18 is 1
And -1 are signals that can be switched. For example, when the signal is 1, the connection is switched to the terminal a side of the switch 23,
When it is 1, the switch control unit 24 controls the switch 23 so that the connection is switched to the terminal b side of the switch 23.

FIG. 19 shows a signal output from the demodulation section 50. In this case, the output from the determination unit 54 of the demodulation unit 50 is a signal in which 1 and -1 are switched. This is a signal for outputting 1 and -1 in order to match the signal of the data supplied to the switch control unit 24, that is, the signal as shown in FIG. As described above, the signal output from the determination unit 54 may be a signal in which 1 and 0 are switched and is a matter that can be changed depending on the design.

The error detector 91-1 (FIG. 17) has a configuration shown in FIG.
A signal of data to be transmitted as shown in 8 and a signal of demodulated data as shown in FIG. 19 are input. By subtracting the other from the one, it is possible to detect the erroneous part. FIG. 20 is a diagram showing a signal indicating the result of subtraction. The signal shown in FIG. 20 has an amplitude of 0, indicating that no error part was detected, that is, the transmitted data was correctly demodulated.

As described above, even if data is transmitted by modulating the signal of the power supply voltage supplied to the electric appliance, as described above mainly with reference to FIG. 17 to FIG. It is possible to perform demodulation with, and it is possible to confirm that the operation of the electric appliance is not affected by the supply of the modulated power supply voltage.

Next, with the configuration shown in FIG.
A signal for comparing the modulated data and the received data will be described. FIG. 21 is a diagram showing a signal of data transmitted from the transmitter 20. That is, it is a signal output from the ± 1 data output unit 72. The signal shown in FIG. 21 is a signal for switching between 1 and -1.

FIG. 22 shows a signal output from the receiver 80. In this case, the output from the determination unit 88 of the receiver 80 is a signal in which 1 and -1 are switched. The error detector 91-2 (FIG. 17) receives the modulated data signal as shown in FIG. 21 and the received and processed data signal as shown in FIG. By subtracting the other from the one, it is possible to detect the erroneous part. FIG. 23 is a diagram showing a signal indicating the subtraction result. The signal shown in FIG. 23 has an amplitude of 0, indicating that no error portion was detected, that is, the modulated data was correctly demodulated on the receiving side.

As described above, even if data is transmitted by modulating a current signal from an electric appliance, mainly in FIG.
As described with reference to FIGS. 21 to 22, surely,
It is possible to perform demodulation on the receiving side, and it can be confirmed that the current is modulated so that it does not affect the operation of the circuit including the electric appliance.

As described above, if the data of the power supply voltage supplied to the electric appliance is modulated to transmit the data, or the current from the electric appliance is modulated, the data is transmitted. For example, in order to transmit or receive data, it is not necessary to newly construct a network by wire or the like, and it becomes possible to construct a home network easily.

The series of processes described above (for example, the process of modulation) can be executed by hardware, but can also be executed by software. When a series of processes is executed by software, it is possible to execute various functions by installing a computer in which the programs that make up the software are built into dedicated hardware, or by installing various programs. The recording medium is installed in a general-purpose personal computer, for example.

FIG. 24 is a diagram showing an internal configuration example of a general-purpose personal computer. The CPU (Central Processing Unit) 101 of the personal computer is an RO
Various processes are executed according to a program stored in M (Read Only Memory) 102. RAM (Random A
In the ccess Memory) 103, data and programs necessary for the CPU 101 to execute various processes are appropriately stored. The input / output interface 105 is connected to an input unit 106 including a keyboard and a mouse, and outputs a signal input to the input unit 106 to the CPU 101. Further, the input / output interface 105 is also connected to an output unit 107 including a display and a speaker.

Further, the input / output interface 105 includes a storage unit 108 including a hard disk,
Also, a communication unit 109 for exchanging data with other devices via a network such as the Internet is also connected. The drive 110 includes a magnetic disk 121, an optical disk 122, a magneto-optical disk 123, a semiconductor memory 12
It is used when reading or writing data from a recording medium such as No. 4 or the like.

As shown in FIG. 24, the recording medium is a magnetic disk 121 (including a flexible disk) and an optical disk 122 on which the program is recorded, which is distributed in order to provide the program to the user, separately from the personal computer. (CD-ROM (Compact Disc-Read Only Mem
ory), DVD (including Digital Versatile Disc)), magneto-optical disk 123 (including MD (Mini-Disc) (registered trademark)), or a package medium including a semiconductor memory 124, as well as a computer It is configured by a hard disk including a ROM 102 and a storage unit 108 in which a program is stored, which is provided to a user in a pre-installed state.

In the present specification, the steps for describing the program provided by the medium are not limited to the processing performed in time series according to the order described, but may be performed in parallel even if the processing is not necessarily performed in time series. Alternatively, it also includes processes that are individually executed.

In this specification, the system means
It represents the entire apparatus composed of a plurality of devices.

[0082]

As described above, according to the information processing system of the present invention, the first information processing device modulates the current based on the data to be transmitted and supplies the current to the second information processing device to supply the second information. The processing device extracts the data from the supplied current and executes the process based on the data, so that the network can be constructed easily and safely.

According to the first information processing apparatus and method and the program of the present invention, the current is modulated based on the data and the modulated current is supplied, so that the construction is simple and safe. It becomes possible to send data to the network.

Further, according to the second information processing method and method and the program of the present invention, the unmodulated second current is subtracted from the first current modulated based on the data to extract the data. Since the processing based on the data is executed, it is possible to easily and safely receive and process the data from the constructed network.

[Brief description of drawings]

FIG. 1 is a diagram showing the configuration of an embodiment of an information processing system to which the present invention has been applied.

FIG. 2 is a diagram showing a configuration example of a transmitter 20.

FIG. 3 is a diagram showing another configuration example of a transmitter 20.

FIG. 4 is a diagram showing a configuration example of a demodulation unit 50.

5 is a diagram showing a configuration example of a modulator 71. FIG.

FIG. 6 is a diagram illustrating a connection example of a receiver 80.

7 is a diagram showing a configuration example of a receiver 80. FIG.

8 is a diagram showing an example of a signal transmitted from the transmitter 20. FIG.

FIG. 9 is a diagram illustrating a signal on which data is placed.

10 is a diagram showing an example of a signal output from a ± 1 data output unit 72. FIG.

FIG. 11 is a diagram showing an example of a signal output from a multiplication unit 74.

12 is a diagram showing an example of a signal output from the modulator 71. FIG.

FIG. 13 is a diagram showing an example of a signal processed by a receiver 80.

FIG. 14 is a diagram showing an example of a signal output from an addition unit 84.

FIG. 15 is a diagram showing an example of a signal output from a multiplication unit 87.

16 is a diagram showing an example of a signal output from the multiplication unit 83. FIG.

FIG. 17 is a diagram showing a configuration example in which an error detector 71 is added.

FIG. 18 is a diagram showing an example of a signal transmitted as data.

FIG. 19 is a diagram showing an example of a demodulated signal.

FIG. 20 is a diagram showing an example of a signal output from the error detector 91-1.

FIG. 21 is a diagram showing an example of a signal modulated as data.

FIG. 22 is a diagram showing an example of a received and processed signal.

FIG. 23 is a diagram showing an example of a signal output from the error detector 91-2.

FIG. 24 is a diagram illustrating a medium.

[Explanation of symbols]

1 distribution line, 2 transformers, 3 drop lines, 11
Distribution board, 12 outlets, 13 modems, 2
0 transmitter, 21 high voltage output section, 22 low voltage output section, 23 switch, 24 switch control section, 5
0 demodulation unit, 51 voltage output unit, 52 addition unit, 5
3 Multiplier, 54 Judgment Unit, 71 Modulator, 72
± 1 data output part, 73 adder part, 74, 75
Multiplication unit, 76 resistance, 80 receiver, 81 resistance, 82 addition unit, 83 multiplication unit, 84 addition unit,
85 signal output section, 86 resistance, 87 multiplication section,
88 Judgment unit

Claims (11)

[Claims] 1. An information processing system comprising a first information processing device for transmitting data and a second information processing device for receiving and processing the data, wherein the first information processing device is a transmission device. And a supplying unit that supplies the current modulated by the modulating unit to the second information processing apparatus, wherein the second information processing apparatus includes the supplying unit. An information processing system, comprising: an extracting unit that extracts the data from the current supplied by; and an executing unit that executes a process based on the data extracted by the extracting unit. 2. An information processing apparatus comprising: a modulation unit that modulates a current based on data; and a supply unit that supplies the current modulated by the modulation unit. 3. The information according to claim 3, wherein the modulation means includes a resistor, and the current is modulated by switching ON / OFF of a voltage applied to the resistor based on the data. Processing equipment. 4. An information processing method comprising: a modulation step of modulating a current based on data; and a supply control step of controlling the supply of the current modulated in the processing of the modulation step. 5. A computer-readable program recorded, comprising a modulation step of modulating a current based on data, and a supply control step of controlling the supply of the current modulated by the processing of the modulation step. Recording medium. 6. A program for causing a computer to execute a modulation step of modulating a current based on data, and a supply control step of controlling the supply of the current modulated by the processing of the modulation step. 7. Input means for inputting a first current modulated based on data, and subtracting an unmodulated second current from the first current input by the input means, An information processing apparatus comprising: an extraction unit that extracts the data, and an execution unit that executes a process based on the data extracted by the extraction unit. 8. The information processing apparatus according to claim 7, wherein the extracting unit generates the second current from a voltage applied when another device modulates the data. 9. An input control step of controlling input of a first current modulated based on data, and a second current which is not modulated from the first current input in the processing of the input control step. An information processing method, comprising: an extraction step of extracting the data by subtracting; and an execution step of executing a process based on the data extracted in the process of the extraction step. 10. An input control step for controlling an input of a first current modulated based on data, and a second current which is not modulated from the first current input in the processing of the input control step. The computer-readable program is characterized by including an extraction step of extracting the data by subtracting, and an execution step of executing processing based on the data extracted in the processing of the extraction step. Recording medium. 11. An input control step for controlling an input of a first current modulated based on data, and a second current which is not modulated from the first current input in the processing of the input control step. A program that causes a computer to execute an extraction step of extracting the data by subtracting and an execution step of executing a process based on the data extracted in the process of the extraction step.