JPH0964894A - Two-wire feed communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extend a feeding warrant time on the occurrence of service interruption by easily checking installed location or the number of installed equipments so as to suppress a feeding voltage level in the case of feeding thereby enhancing noise immunity in a transmission line represented by a pair line. SOLUTION: A capacitor having a high impedance characteristic at a frequency band used for communication is provided to a transmission line 3 to limit the number of communication equipments 2 fed by a power supply section 1. In order to prevent noise, each feeder 1 is covered by a shield case, the transmission line 3 has a drain wire and a shield and the power reception by each communication equipment 2 is controlled by a secret packet at the time of service interruption/restoration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply communication device for a housing complex, etc., and in particular, it can communicate with each other by a pair wire and can supply a DC power supply, and at the same time, can manage power supply in case of power failure. The present invention relates to a wire-type power feeding communication device.

[0002]

2. Description of the Related Art FIG. 6 shows a conventional ET-2101 home bus system (established in September 1988) of the Japan Electronic Machinery Manufacturers Association standard, which has been used for a home bus system (HBS) and a housing complex system. Target 2
1 shows a representative example of a network configuration of a wire-type power feeding communication device.

In the figure, reference numeral 1 is connected to an arbitrary location of two transmission lines 3 connected to each other, has a high impedance characteristic in a frequency band of a signal to be transmitted, and has a specific DC voltage (currently) on the transmission line. 3 in the home bus system of
4V is standard. ) Is a power feeding device, and therefore 2
Φ0.6 according to the above standard with one terminal 101, 102
5 are connected to the pair lines 31 and 32. It should be noted that the multiple power supply devices are installed here because the voltage drop due to loop resistance, the large capacity of transistors and transformers are relatively expensive, and the installation space is taken into consideration. Is.

Reference numeral 2 is a communication device such as an IFU (Inter Face Unit), which is connected to an arbitrary portion of the transmission line 3 and transmits / receives an AMI (alternating mark inversion) signal through the transmission line to achieve 9.6 Kbps. a communication unit 21 for communicating with other communication devices in ± 0.13%, (mainly 4.8KH _z, tens H _Z ~ several hundred KH _Z) frequency band signal has a characteristic of high impedance at The power receiving unit 22 receives a specific DC voltage supplied from the power supply device 1 and has a charging function. The power receiving unit 2 has a power storage function necessary to put the device into a so-called sleep state at the time of power failure and promptly restore the original function of the device at the start of power reception.

Reference numeral 3 is a transmission line composed of pair lines 31 and 32. The power supply device 1 and the communication device 2 are electrically connected by a pair of connected transmission lines 3. Therefore, each power feeding device 1 can feed a DC voltage to all the transmission lines 3. On the other hand, each communication device 2 receives this DC voltage supplied on the transmission line, enters a driving state, can perform necessary amplification, etc., and can perform communication with other communication devices and the outside (not shown). It is possible.

Actually, the power supply device 1 and the communication device 2
The number is not necessarily the same type because there are more than two or three machines and there are important communication devices. In addition, NT in HBC (home bus controller) that manages station line management, system recovery function management, and terminal status management
(Network termination) is connected to an external network such as a public telephone network or CATV network at any one place, and also monitors and controls telephone lines.

FIG. 7 is a circuit configuration diagram of the power feeding device. As shown in the figure, this circuit supplies a power supply unit 11 for generating a DC voltage and a direct current received from the power supply unit 11 to a specific voltage to supply power to the transmission line 3 connected to terminals 101 and 102. And the transmission line, for example, 9600 bps
A power supply unit 12 having a high impedance characteristic in a carrier frequency band of a signal transmitted in
The transmission lines connected to the terminals 101 and 102 have capacitors 15 and 16 for removing direct current and a signal transmission unit 14 for transmitting signals through a transformer 13 for removing in-phase noise.

The power supply unit 11 generates a direct current voltage from a commercial power supply to supply power to the power supply unit 12, and the power supply unit 12 that has received the power charges and generates a specific power supply voltage.
Power is supplied to the transmission line connected to 2. Also, at the time of power failure, the signal transmission unit 14 generates a specific signal to generate the CSM.
A (Carrier Sense Multi Access) / CD (Collision
Detection) method (carrier detection multiple access / collision detection), and whether to stop receiving power except for the communication device 2 connected on the transmission line 3 which is important in an emergency. Or encourage the power supply to be reduced.

Further, at the time of restoration, each communication device 2 detects the voltage restoration and restores itself, or the signal transmission unit 14 generates a specific signal to stop receiving power, or the power supply is reduced. A notification that the power can be received by the specified access method represented by the CSMA / CD method is transmitted to the communication device, and each communication device that has received this notification starts receiving the power.

[0010]

However, in the above-mentioned conventional configuration, an excessive burden of the power supply is imposed depending on the installation location and the number of installed power supply devices and communication devices on the transmission line, and as a result, the power supply voltage is increased. The power supply device comes out. In addition, in order to eliminate the power supply device that overloads the power supply, it is often difficult to grasp accurately at the time of design and planning depending on the user's circumstances, etc. However, it will be necessary to conduct thorough examinations and adjustments with the building, which will reduce the workability including design and planning.

Further, since it is unclear what kind of communication device is connected, no measure is taken such as making the common mode voltage of each power supply device common, and a commercial power supply or a refrigerator driven by this is not used. There is insufficient consideration of external noise that cannot be completely prevented due to fluctuations in the electric field and magnetic field from the equipment, mutual interference of the communication equipment itself, etc., and the noise resistance is also poor.

Also, regarding the power supply itself of the power supply device, when the communication devices are used all at once for some reason, or when an excessive current that may occur in a pure accident such as a leakage is generated, it is positive. However, there is a possibility that the power supply voltage may be lowered and the semiconductor or the like may be thermally destroyed. Also, in the event of a power outage caused by a typhoon, lightning, etc., each power supply device cannot always perform a quick recovery process, and on the other hand, it is often difficult to expect a reduction in power supply to each communication device. However, it may only be possible to guarantee power for a short time.

However, in order to sufficiently deal with these problems, increase the DC voltage, thicken the wire diameter, increase the margin of each other equipment, add additional specialized equipment and facilities, etc. That is, the entire system becomes expensive even if restrictions on the voltage and the like based on laws and standards are excluded. This is not particularly desirable for personal use.

Therefore, there is a demand for a simple and inexpensive two-wire power supply communication device with few such problems, and further, a two-wire power supply communication device with due consideration given to the processing at the time of power failure and restoration. . The present invention has been made for the purpose of solving such problems.

[0015]

In order to achieve the above object, the invention of claim 1 is called a so-called pair wire.
A transmission line composed of a line and also serving as a signal transmission path between communication devices connected to a predetermined DC supply path that is a power source of the connected equipment, and a plurality of DC lines connected to the transmission line to supply DC Is connected to the power supply device of
Direct current is supplied from the power supply device via the electric wire, and at the same time,
For example, an AMI signal with a duty ratio of 50% (9.6K
In a two-wire type power feeding communication device having a plurality of communication devices that communicate with each other via (each) transmission line at bps ± 0.13%, the transmission line (divided by each power feeding device) From the perspective of a transmission line, at least one transmission line) is connected to a pair of paired lines to cut off the direct current, and each power supply device is connected with one or two power supply units (regular and emergency). Independent for each unit less than a certain number of units determined from the required power, etc., and in addition, each communication device has a high impedance characteristic in the frequency band used for communication by the communication device to connect each communication device from the communication side, As a result, at least one pair of DC-cutting elements (disconnecting parts) for each pair of wires that enables communication as in the conventional case (including a set of two for each wire for the convenience of standards such as capacitors) is provided. It is characterized by being.

In the invention of claim 2, the DC cut element in the invention of claim 1 has a capacitor or is a capacitor itself. According to a third aspect of the present invention, as in the first aspect of the invention, in the two-wire type power feeding communication device, each transmission line includes two original transmission lines for transmitting DC power and communication. In order to prevent the generation of a secondary weak current due to the potential difference between both ends, as a general rule, the ground wire whose only one end is grounded and the original two transmission lines and the ground wire are shielded. A shield part made of a long tubular wire made of a metal net and two equivalent and predetermined impedances for each transmission line whose one end is connected, for example, near the end of one of the transmission lines (for example, It has a characteristic impedance that is half the characteristic impedance of the transmission line in the communication frequency band.) A load resistor and one end of each of the two load resistors are connected to the ends opposite to the transmission line, and the other ends are connected to each other by a connecting line. Two DC cuts And children, and the connecting line and the load resistance midpoint grounding wire for connecting the ground wire, said two load resistors Like 2
Each of the power supply devices has two DC cut elements and a load resistance shield that shields the ground wire for the load resistance midpoint, and each power supply device has two original transmission lines in addition to the original power supply unit that supplies DC. A total of two ground connection lines connecting each to the ground line, and two high-impedance characteristics provided in each of the two ground connection lines and having a high impedance characteristic in the frequency band used by the communication device for communication. Two equivalent DC cut elements, and two equivalent DC cut elements, one end of which is connected to one of the DC cut elements and the other end of which is connected to one of the transmission lines, and which has high impedance characteristics in the frequency band used by the communication device for communication. A high load resistance, a power supply part, the two DC cut elements, the two high load resistances, a connection part of each of these parts, and a ground wire and a connection part of two DC cut elements, for example, Consisting bromide foil has a shield (of course, may have other configurations) are characterized by.

In the invention of claim 4, the DC cut element in the invention of claim 2 is a capacitor such as an electrolytic capacitor. According to the invention of claim 5, a transmission line, which is composed of a pair of wires and serves both as a supply path of a DC power supply and a transmission path of a signal, a plurality of power supply devices connected to the transmission line to supply DC as a power supply, and the transmission line. In the two-wire type power supply communication device, which is supplied with direct current from the power supply device via the power supply device and also communicates with each other by, for example, AMI signals via the transmission line, each power supply device has a voltage of 34V. A power supply unit that generates a predetermined DC power supply determined by communication equipment and laws, a power supply voltage adjustment unit that controls the DC voltage output from the power supply unit within a certain range, and a power supply that is connected to two transmission lines. A direct current output from the power supply unit is measured and the current is controlled within a constant value such as a maximum of 1 A from the aspect of semiconductor burnout prevention, and a power supply unit supplies a constant voltage and a constant current A power supply unit that receives and supplies this to the transmission line The signal transmission unit that guarantees the transmission of signals from the communication device, and the signal transmission unit is provided between the two transmission lines, the primary coil is connected to the output end of the signal transmission unit, and the secondary coil is A transformer with sufficient transparency in the frequency band used by the communication device for communication is formed by connecting a sufficiently large-capacity capacitor to the center of the transformer and both ends of the power supply voltage adjustment unit and the capacitor. And a connecting wire for connecting both ends of the.

According to a sixth aspect of the present invention, in the same two-wire type power feeding communication device as in the first and third aspects of the present invention, at least one power feeding device is configured to supply power to a power failure and restore its voltage. A power failure recovery detection unit that automatically detects when a power failure occurs, and a detection result from the power failure recovery detection unit that, when a power failure occurs, restores all or predetermined nonvolatile data to a predetermined communication device via a transmission line in advance. Specific power reception ON / OFF according to the programs stored in the specific ROM
The communication device has a power feeding control unit that sends out a control signal, and the communication device receives the power receiving ON / OFF control signal through a power receiving unit that receives direct current and a transmission line, and sets the content thereof to a predetermined value. Based on the recognition results of the power receiving ON / OFF control signal accepting unit and the power receiving ON / OFF control signal accepting unit that are recognized by the procedure, the power receiving unit receives and stops according to the predetermined procedure. It is characterized by having a power reception control unit.

According to a seventh aspect of the present invention, the power supply control section receives power ON / O based on a predetermined rule such as a header part, a recitation number part, a priority of a device or a user, and an importance level.
The power receiving device has a packet creating unit for creating a packet including a power receiving ON / OFF signal sentence portion for controlling the FF,
The N / OFF control signal accepting unit determines that the header portion of the received packet does not indicate communication from another communication device,
Recognize that the packet contains the power-reception ON / OFF control signal text, and recognize the validity of the packet based on the recitation number part of the packet, that is, not a mischief, etc., and receive the power-reception ON / OFF signal text part of the packet. ON / OF of power reception such as power cut command for own device
It is characterized in that it has a packet recognition unit for recognizing the control content of F (of course, it also has a recognition content execution unit).

[0020]

According to the above construction, in the invention of claim 1,
At least one high-pass filter for each transmission line, a DC cut element such as a level cut transistor, etc. is connected to a pair of transmission lines, so that each power supply unit can be fed from a fixed unit number determined from the required power. For each communication device, for example, for each one, for each total power supply of 100 W or less, or for each room, each communication device has high impedance characteristics in the frequency band used for communication. Are connected to each other from the communication side.

According to the second aspect of the present invention, the DC cut element is a capacitor that is strong against impulses and is inexpensive and easily available, whereby the DC is cut off. In the invention of claim 3, the two original transmission lines that are responsible for transmission of the direct current and communication are separately connected to the ground line, and the original transmission line and the ground line are shielded by the shield part. It Further, by grounding the middle point of the load resistance, the impedance of the transmission line in the transmission frequency band becomes constant. The power feeding device is connected to a line that connects the ground line and one of the original transmission lines, and is further connected to two equivalent DC cut elements having low impedance characteristics in the frequency band used by the communication device for communication, and one end is also connected. One of the DC cut elements, the other end is connected to one of the transmission lines, and is connected to two equivalent high load resistors having high impedance characteristics in the frequency band used for communication by the communication device, and the power supply device main body And the two DC cut elements, the two high load resistors and their respective connection parts, and the ground wire and the two DC cut element connection parts are covered with a shield or a stabilized power supply equivalent thereto ( Including, in effect), which provides external noise isolation.

According to the fourth aspect of the invention, since the DC cut element uses a capacitor, the DC is cut off by this. In the invention of claim 5, a DC power supply is generated in the power supply section in the power supply device. Similarly, the power supply voltage adjustment unit controls the DC voltage output from the power supply unit within a certain range determined by, for example, laws and standards. Similarly, the power supply current control unit controls the direct current output from the power supply unit within a fixed range. The power supply unit receives a constant voltage and a current within a constant from the power supply unit, and supplies this to each communication device through a transmission line. Similarly, the signal transmission unit guarantees the mediation of transmission of a signal from the communication device. Also, in the transformer,
The primary side coil is connected to the output end of the signal transmission part, and the secondary side coil is divided into two equal parts by connecting a sufficiently large capacity capacitor to the center part, and burning is done by cutting off the direct current. Prevention is achieved. On the other hand, the communication device has sufficient transparency in the frequency band used for communication.

According to the sixth aspect of the present invention, at least the power failure recovery detection unit of the power supply apparatus detects the power failure of the power source and its recovery based on a voltage change or the like. Similarly, the power supply control unit receives the detection result of the power failure recovery detection unit, and at the time of power failure and recovery, each communication device receives predetermined power ON / OF via the transmission line.
Sends a signal for F control. DC power is being received at the power receiving unit in the communication device, but at the time of a power failure, etc., the power receiving ON / OFF control signal receiving unit receives the power receiving ON transmitted via the transmission line. Receiving the ON / OFF control signal and recognizing its content. Similarly, at the time of power failure recovery, the power reception control unit controls power reception and stop of the power reception unit based on the recognition result of the power reception ON / OFF control signal reception unit.

According to another aspect of the present invention, the packet creation unit of the power feeding control unit includes a header portion, a code number portion, and a power reception ON / OFF signal text portion for controlling power reception ON / OFF based on a predetermined rule. Packet is created by following the program and rules beforehand.
The packet recognition unit in the power reception ON / OFF control signal reception unit recognizes that the packet is the header of the received packet, recognizes the validity of the packet by the recitation number part of the packet, and receives the packet. The ON / OFF signal sentence portion recognizes the control contents to the own device and performs necessary processing.

[0025]

Embodiments of the present invention will be described below. (First Embodiment) FIG. 1 is a block diagram of a first embodiment of a power supply communication apparatus according to the present invention. As shown in the figure, the basic system configuration of this embodiment and the functions and actions of the respective constituent elements are the same as those of the above-mentioned conventional technology. That is, in comparison with FIG. 6, in the two-wire type power feeding communication device of FIG. 1, a large number of communication devices and power feeding devices are connected to a so-called paired wire and a large number of branches from this, There is no difference in that the power receiving unit 22 receives power from the power receiving unit 22, the communication unit 21 performs communication, and the power feeding apparatus 1 receives power from the power feeding unit 12. However, in FIG. 1, two capacitors 171 and 17 each having a capacity of 47 μF provided in each power feeding device 1 are provided.
2, the two paired wires 31, 32 forming the transmission line 3
It is different that each (indicated by a thick dotted line and a thick solid line) is cut off from the direct current supplied from the power supply unit 12 (not shown in FIG. 6) which is the original power supply unit. Therefore, the transmission line 3 is different from a so-called one-stroke one, and in turn, each power supply device 1 is inevitably provided with a total of four connection terminals for paired lines.
That is, the connection terminal 101 in FIG.
11 and 1012, and 102 is 1021 and 10
It is 22. The use of a capacitor as a DC cut element without using a high-pass filter, a level cut transistor, etc. is intended to reduce the facility cost at the present time. As a result, each power supply device 1
The communication device 2 is disconnected from other devices connected via the capacitors 171 and 172 from the viewpoint of direct current and power supply, and is branched and connected to a pair line connected without being interposed.
Direct current of a specific voltage is output only to. Therefore, the communication device 2 is maintained without the capacitors 171 and 172.
It is only necessary to take charge of power supply to.

On the other hand, each power supply device 1 has a high impedance characteristic in the frequency band of the signal transmitted on the transmission line 3 under the action of an internal signal transmission unit (not shown) and the like. As a result, the signal transmission function is not different from the conventional one. Next, the capacitor 17
Nos. 1 and 172 are capacitors having sufficient transparency and carrier property in the frequency band of the above-mentioned signal.

With the above configuration, in the two-wire type power feeding communication device of this embodiment, each communication device 2 has a pair line 3 which is a transmission line 3.
Although it is not different from the conventional one that the AMI signals composed of high-frequency currents flow through the capacitors 171 and 172 connected to the capacitors 1 and 32, it is possible to communicate with each other. It is assumed that the power is supplied from the power supply device 1 that is maintained without the intermediation, and each power supply device 1 needs to supply power only to the communication device 2 that is connected to one of the pair lines that does not include the capacitors 171 and 172. become.

As a result, in each power supply device 1, the load of power supply is reduced in terms of both current and voltage to be maintained. Also, in the wiring work, it becomes easy to examine the amount of power to be supplied and the voltage drop value for each of the power supply devices 1, and it is possible to select an appropriate pair wire and perform the work such as inspection of the insulation property of the system. The burden on the system is also reduced, and since it is only necessary to connect similar combinations, it is easy to increase the system scale.

In FIG. 1, the power supply device and the communication device are 1
Although the pair is set to 1, it is needless to say that the present invention is not limited to this in terms of the planning and design of the two-wire power feeding communication device, the ease of increasing the scale of the system. That is, for each private room (room) in an apartment house, 1
It may be within a fixed ratio determined by the amount of power that can be supplied by each power supply device and the amount of power consumption of one communication device. (Second Embodiment) FIG. 2 is a block diagram of a second embodiment of a power supply device according to the present invention and wiring therefor.

For example, the basic structure of this embodiment, each power feeding device 1 has a high impedance characteristic in the frequency band of the signal transmitted on the transmission line 3, and outputs a specific DC voltage. That is, each communication device 2 has a high impedance characteristic in the frequency band of the signal transmitted on the communication line 21 and the signal transmitted on the transmission line 3, and receives the power supply from the power supply device 1 and the communication device 2. Having the power receiving unit 22 for driving the is similar to the conventional one.

It is also the same for each power supply device 1 to supply power to each communication device 2 via the paired wire 3 which is a transmission line.
However, each power supply device 1 has a shield case 110, two load resistors 181 and 182, each pair having a value of 39 ohms to 47 K ohms and equivalent, and capacitors 191 and 192, each pair having an equivalent value of about 50 μF. Finally, the transmission line 3 is grounded, and one end of the transmission line 3 is grounded, and dozens of thin wires are bundled to facilitate construction.
And having a shield 34 is different.

Further, the transmission line 3 is also different in that it is grounded by a terminator 50 having substantially the same structure. Hereinafter, the present embodiment will be described focusing on these differences. The power feeding device 1 is covered with a shield case 110,
Two load resistors 18 of the same impedance inside the
1, 182 and capacitors 191, 192.
Further, each pair of wires 31 and 32 is connected to the corresponding load resistance 191, 192, capacitor 181, and
182 in this order, and finally connected to the ground wire 111 directly or via the drain wire 33. The drain wire 33 is connected to the ground wire 111 at the location where the power supply device 1 at the end is installed.

Further, the branch of the transmission line 3 from each power feeding device 1 except for both ends to the communication devices 2 on both sides is provided with a shield case 11.
It is done within 0. Therefore, the shield case 110
Are two connecting terminals or through holes 1011, 1012 or 10 for each pair of wires, except for the power supply device 1 at both ends.
21, 1022, one connection terminal 103 for the drain wire
After all, it has five connection terminals and also has a through hole for the ground wire 111.

Next, in the transmission line 3 as well, in the terminator 50, each pair of lines 31, 32 has a resistance of 500 ohms 5001, 500 of 39 ohms.
It is connected to the ground wire 5005 for the load resistance middle point through the capacitors 5003 and 5004 of 2 and 50 μF, and further connected to the drain wire. Further, this portion is shielded 5006 by a metal foil. Next, the operation will be described.

The power feeding device 1 includes capacitors 191, 192.
Since it is grounded via the DC line, there is no problem in supplying direct current. On the other hand, maintaining the balance by the load resistors 181 and 182 makes it possible to reduce the bit error rate due to the influence of external noise. In addition, the impedance between the pair wire cores and the ground is also equalized, and the noise of the in-phase signal is equalized.
It is possible to improve the effect of removing the common mode noise.

Further, the shield case 110 is connected to the drain wire 3
By connecting them in common at 3 and dropping the power supply device 1 to the ground 111, it is possible to reduce the entry of external noise into the transmission line, and the system has excellent noise resistance.
Further, at this time, since the terminator 50 as a load resistance is connected to the transmission line, the impedance of the transmission line is stabilized in the transmission frequency band even if a large number of transformers are connected. The property is improved. (Third Embodiment) FIG. 3 is a block diagram of an embodiment of the power feeding device according to the present invention. As shown in the figure, the power feeding device of the present embodiment has a signal transmission unit 14 that transmits a signal on a transmission line, a power supply unit 11 that generates a DC voltage, a high impedance in a signal frequency band, and a specific impedance. It is the same as the conventional one shown in FIG. 7 that it has a power feeding unit 93 that generates and sends a DC voltage and a transformer 13 that has a characteristic that a signal can sufficiently pass through. However, it is different in that it has a power supply current detection unit 4 and a power supply voltage adjustment unit 5, a switch 6 and a high-impedance resistor 7 in order to appropriately perform their functions, and that the configuration of the transformer 13 is different. .

Hereinafter, these differences will be mainly described. The power supply current detection unit 4 detects the power supply current and stops the power supply when the power supply exceeds the allowable maximum current and the power supply continues to exceed the maximum allowable current after a specific time period. To do. Therefore, one terminal 11 of the power supply unit 11
01 and one terminal 1203 of the power feeding unit 12 are connected, and another terminal 1102 of the power supply unit 11 and another terminal 1 of the power feeding unit 12 are connected.
202 is connected via the switch 6 and the low impedance resistor 7. Further, two terminals 401 and 402 of the power supply current detection unit 4 are connected to both ends of the resistor 7. Then, from the feeding current detection unit 4 to the switch 6
A line 403 for performing ON / OFF control of is connected.
The terminals 1203 and 1204 on the output side of the power feeding unit 12 are connected to the transmission lines 31 and 32 which are paired lines.

The power supply voltage adjusting section 5 detects the power supply current so that the power supply section 12 sends out a specific DC voltage, and the power supply section 9
The DC voltage of 7 is adjusted and controlled. For this reason,
The terminals 1401 and 1402 of the signal transmission unit 14 are the transformer 1
3 are connected to the primary side terminals 1301 and 1302, while
The secondary side of the transformer 13 is divided into two via the capacitor 8. And each 115m divided into two
Internal terminals 13041, 1 of the transformer equivalent to Hmin
3032 is connected to both ends of the 47 μF capacitor 8 in the signal carrier frequency band, and is further connected to both connection terminals 501 and 502 of the power supply voltage adjusting unit 5. On the other hand, the external terminals 13031 and 13042 are connected to the pair wires 31 and 32, respectively.
It is connected to the. The power supply voltage adjusting unit 5 is also connected to the signal line to the power supply unit 11.

Next, the operation will be described. Power supply device 1
In the same manner as the conventional one, the power supply unit 11 generates a DC voltage and the power supply unit 12 supplies power. At this time, the power supply voltage is constantly detected by the power supply voltage adjusting unit 5, and when the power supply voltage deviates from a specific range, 34V ± 2V in this embodiment, the voltage supplied by the power supply unit 11 is adjusted.
At this time, the value of the resistor 7 is 47 ohms, which is sufficiently small.
Therefore, it goes without saying that the voltage drop due to this is not a problem. Similarly, when the power supply unit 11 exceeds the maximum allowable power supply current, the power supply current detection unit 5
When this is detected by the potential difference of the resistor 7 and the power continues to exceed the allowable maximum current even after the lapse of a specific time,
The switch 6 is turned off to stop power supply.

Further, when transmitting a signal as in the conventional case, the signal transmitting section 14 transmits the signal to the transmission lines 31 and 32 through the transformer 13. At this time, transformer 13
The secondary side capacitor 8 removes the DC voltage to protect the secondary side coil, and is also connected to the central connection portion of the secondary side coil to maintain the balance.

The power supply device 1 can be easily stabilized by detecting the power supply voltage without passing a direct current through the central connecting portion having the capacitor of the secondary coil of the transformer 13. Further, when the signal transmission unit 14 transmits a signal to the transmission line via the transformer 13, it becomes possible to maintain a high degree of balance.

Further, since the transformer 13 cuts off the direct current by the capacitor 8, it is possible to prevent damage to the semiconductor or the like of each portion due to heat at the time of an accident, and it is not necessary to consider the voltage effect due to the direct current resistance of the coil of the transformer 13. . (Fourth Embodiment) FIG. 4 is a block diagram of an embodiment of a power feeding communication device according to the present invention and a power feeding processing device at the time of power failure / restoration thereof. FIG. 5 is a conceptual diagram of an embodiment of power reception ON / OFF packets transmitted at the time of power failure / recovery.

In FIG. 4, reference numeral 3 is a transmission line composed of a pair of wires, and the power feeding device 1 and the communication device 2 are connected to arbitrary portions thereof. The power supply device 1 of at least 1 includes a power supply unit 11 that generates a DC voltage, a power supply unit 12 that outputs the generated DC voltage as a specific power supply voltage, and has a charging function.
The power supply unit 11 includes a power supply control unit 45 that detects whether or not the power supply unit 11 has a power failure, generates a predetermined packet at the time of power failure and restoration, and notifies each communication device 2 of various information all at once.

The communication device 2 is activated by receiving power from the transmission line 3 and is activated, and also has a charging function, a communication part 21 for communicating with another communication device 2, and a power supply device 1. When the power reception ON / OFF packet is received and the power failure occurs, the power switch 21 of the power reception unit 22 of the communication unit 21
The power failure / recovery detection unit 23 is configured to immediately turn off the power supplies 1 and 221 and to be immediately turned on at the time of recovery, and the switch 231 for starting and stopping the power failure / recovery detection unit 23.

In FIG. 5, reference numeral 210 indicates ON / OF for receiving power.
A packet used for communication for controlling F, which includes predetermined information at the time of power failure and recovery of the power supply device 1 and is transmitted to each communication device 2 by the transmission line 3.
Inside thereof, a header portion 2101 that can immediately detect that it is a reception ON / OFF packet, and a recitation number portion 2102 for maintaining confidentiality and safety,
Reception ON / OFF portion 2103 incorporating information for judging ON / OFF of power reception for each user or communication device
Consists of.

Next, the operation will be described. Radio receiver,
An emergency communication device 2 having a function represented by a security device such as a telephone is a power failure / recovery detection unit 23.
The power supply switch 231 is turned off to stop the power supply so that power can be constantly supplied. On the other hand, the communication device 2 or the like, which is judged to be less important in an emergency when remote-controlling a normal home electric appliance or the like, is activated by turning on the switch 231 for the power failure / recovery detection unit. Enables proper power supply prevention and control operations such as starting at the time of restoration. Further, in an apartment house or the like, it becomes easy to supply power only to a communication device managed by a manager or a company house.

As a concrete procedure, at the time of power failure, the power feeding device 1 has a recitation number portion 2102 in which a personal identification number is preset and a reception ON / OFF portion 2103 in which power reception OFF information as predetermined information is set. Power reception ON
The ON / OFF packet 210 is generated and transmitted to the transmission line 3. Therefore, in the power supply control unit 45 and the power failure recovery detection unit 23 of each communication device, the provider of the present system obtains the consent of each user in advance and the provider of the system creates a packet creation device, a reception / decryption device, and necessary programs. It is designed to start operating due to the detection of abnormal voltage or current, as well as the voltage drop or rise at the time of power failure or restoration. Further, at this time, the destination, the recitation number, the countermeasure, the processing content, etc. are selected and input by the installer of the power feeding communication device, for example, for each user for each content of the communication device. Of course. However, the creation of packets, detection of power failure, etc., and collation of the code number and ID by standby power at the time of power failure are, so to speak, well known techniques. Therefore, description of these is omitted. Also, what kind of communication device is given priority is determined on a case-by-case basis. Therefore, description of the contents such as selection criteria for this is also omitted.

The communication device 2 which has received the power reception ON / OFF packet 210 recognizes from the header portion 2101 that it is the power reception ON / OFF packet 210,
By referring to the personal identification number by the recitation number portion 2102 and if it matches, the reception ON / OFF unit 2103 is referred to, the content of the power reception OFF information to itself is confirmed, and the switches 221 and 211 are turned OFF accordingly.

At the time of restoration, the power feeding device 1 has a power receiving ON / OFF unit having a header portion 2101, a code number portion 2102 in which a personal identification number is preset, and a reception ON / OFF unit 2103 in which various power receiving ON information is set. OFF
A packet 210 for use is generated and transmitted to each communication device 2 via the transmission line 3. This power reception ON / OFF packet 21
The communication device 2 which has received 0 recognizes that it is the power reception ON / OFF packet 210 by the header portion 2101, refers to the personal identification number by the password number portion 2102, and if it matches, the content of the reception ON / OFF portion 2103. Check the power reception ON information destined for the own device, and turn on the switches 221 and 211.

According to this power outage / recovery processing procedure, the power of the communication device can be instantaneously stopped during a power outage, and the power supply device can supply power for a long time. You can start receiving power from each communication device,
In addition to being able to perform restoration in a short time,
Regarding the judgment timing and procedure, it is possible to select the best one according to the situation of the power failure, the elapsed time from the power failure, the battery voltage and the like.

Further, when a high lightning strike or the like is expected, a certain device such as a CPU can be turned off in advance in order to prevent the data from being destroyed. Although the present invention has been described above based on some embodiments, it goes without saying that the present invention is not limited to the above embodiments. That is, the following is also included in the present invention.

(1) For the convenience of manufacturing, etc., one or more essential constituent elements (requirements, parts) of the present invention may be physically or mechanically plural, or conversely, plural plural elements may be integrally formed, or if necessary, these may be integrated. Are combined. For example, the power supply control unit is provided as a separate body and provided in one place. (2) In the first embodiment, the number of communication devices fed from one power feeding device is not 1, but a free number such as a predetermined number or less. Alternatively, power is supplied to other than the communication device. On the contrary, a plurality of power supply devices are set for convenience of standardization and required power and for convenience and standby. (3) In the second embodiment, the resistance of the terminator is set to 150Ω in the case of an apartment house due to laws and standards.
Or, the setting place is not near either end, but it is examined individually and made the optimum place. It is also installed in multiple places. In this case, the resistance value is separately selected as an optimum value such as 75Ω if there are two resistance values.

(4) The invention of each embodiment is incorporated into a part or all of the system. (5) Even during a power failure, each communication device can be supplied with power only at a certain time. (6) Each power supply device has a battery, and the importance of each communication device is classified, so that the less important ones cannot be supplied with power due to the elapsed time of a power outage or the voltage drop. .

(7) With the revision of laws and regulations and technological advances,
More desirable values for frequency band, voltage, type of hardware, etc.
It is considered as a type.

[0055]

As described above, according to the present invention, a capacitor or the like is inserted in a transmission line connecting a power feeding device, and power is supplied only to a transmission line not via a capacitor and a communication device connected thereto. As a result, in terms of communication, the direct current as a power source is cut off while maintaining the function as a signal transmission line, which facilitates the examination of the installation location and the number of installations of the power supply device during wiring work. Larger scale is possible. In addition, it is possible to flexibly respond to the sudden increase in the number of apartment buildings and sudden changes in design and plans.

Further, in the power feeding device connected to the relay point of the transmission line, the shield case of the power feeding device and the drain line of the transmission line are connected and grounded, and at the same time, paired with each transmission line of the power feeding device. By connecting and connecting a resistor and a capacitor, the common mode voltage of each power supply device can be made common from the aspect of signal transmission while grounding, and the balance can be improved, and noise resistance can be greatly improved. It becomes possible. At this time, since the load resistance is connected to the transmission line, the impedance of the transmission line is stabilized, the balance is improved, and the resistance is improved even if a large number of transformers and other devices that cause instability are connected. It contributes to the improvement of noise.

Further, a signal transmission unit is provided in parallel with the power feeding unit provided in the power feeding device via a transformer, and a power feeding voltage adjusting unit is provided in parallel with the capacitor at the central connection portion of the secondary coil of the transformer. A low-impedance resistor is connected to one of the connection lines between the power supply and the power supply, and a power supply current detector is provided at both ends of the resistance to stabilize the power supply voltage level even when the power supply current fluctuates. It is possible to prevent the thermal destruction of the semiconductor or the like by stopping the power supply when the excessive power supply current is sent due to the electric leakage caused by the earthquake. In addition, this fact and independence from the aspect of direct current also prevent and protect the entire device from being destroyed due to an operation error at one place, and also improve the so-called foolproof property.

In addition, when the power supply device has a power failure / recovery, a signal having predetermined information about ON / OFF of power reception is sent to each communication device, and each communication device receives the signal at the time of power failure / recovery based on this signal. By providing a power failure / recovery unit that turns power reception ON / OFF, power can be supplied only to important communication devices during a power failure, and it is possible to significantly reduce power supply during a power failure. Also, by using your PIN,
It is also possible to prevent mischief, etc., and also to restore power gradually in terms of power supply, to prioritize important devices and devices of important persons, and to make detailed classifications.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a first embodiment of a power feeding communication device according to the present invention.

FIG. 2 is a configuration diagram of a second embodiment of a power feeding communication device according to the present invention.

FIG. 3 is a circuit configuration diagram of an embodiment of a power supply device according to the present invention.

FIG. 4 is a configuration diagram of an embodiment of a power feeding communication device according to the present invention and a power feeding processing device for the power feeding at the time of power restoration.

FIG. 5 is a configuration diagram of a power reception ON / OFF packet in the above embodiment.

FIG. 6 is a configuration diagram of a conventional power feeding communication device.

FIG. 7 is a circuit configuration diagram of a conventional power supply device.

[Explanation of symbols]

1 Power Supply Device 11 Power Supply Section 12 Power Supply Section 13 Transformer 14 Signal Transmission Section 110 Shield Case 111 Ground Wires 15, 16, 171, 172 Capacitors (Signal Carrying, DC Disconnection) 191, 192 Capacitors (For Ground) 181, 182 Resistance (Ground) 2) Communication device 21 Communication unit 210 Power reception ON / OFF packet 22 Power reception unit 211, 221, 223 Switch (for communication device) 23 Power failure / recovery detection unit 3 Transmission line 31, 32 Pair line 33 Drain line 34 Shield 4 Power supply Current detection unit 45 Power supply control unit 5 Power supply voltage adjustment unit 50 Terminator 6 Switch (for power supply unit) 7 Resistance (for current detection) 8 Capacitor (for secondary transformer)

Claims (7)

[Claims] 1. A plurality of power supply devices, a plurality of sets of transmission lines consisting of two wires, and a plurality of communication devices, wherein adjacent power supply devices are connected by one set of transmission lines, and transmission lines are also provided. A communication device is connected to the power supply device and power is supplied from the power supply device to the communication device via a transmission line, while the two-wire type power supply communication device is capable of communicating between the communication devices via each set of transmission lines. A two-wire power feeding communication device, wherein a DC cut element is inserted in at least one set of transmission lines connected to at least one transmission line. 2. The two-wire power supply communication device according to claim 1, wherein the DC cut element has a capacitor. 3. A two-wire type power feeding communication device having a two-wire type transmission line, a plurality of power feeding devices for supplying direct current to the transmission line, and a plurality of communication devices for communicating via the transmission lines, As for the transmission line, in addition to the original two transmission lines that transmit direct current supply and communication, a grounding wire for grounding, a shield part that shields the original two transmission lines and the grounding wire, and one end Load resistors having two equivalent and predetermined impedances for each transmission line connected to one of the transmission lines, one end of each of the load resistors is connected to the end opposite to the transmission line, and the other ends are connected to each other. Two DC cut elements connected by a wire, a ground wire for a load resistance midpoint that connects the connection line and the ground wire, and two DC cut elements and a load resistance midpoint for the two load resistances With a shield for load resistance that shields the ground wire However, in addition to the original power supply unit that supplies DC, each power supply device has a total of two ground connection lines that connect each of the two original transmission lines to the ground line, and the two ground lines. Equivalent 2 provided in each connection line
Two direct current cut elements, two equivalent high load resistors having one end connected to one of the direct current cut elements and the other end connected to one of the transmission lines, and having high impedance characteristics in a communication frequency band; A two-wire type power supply having two DC cut elements, the two high load resistors and a connection part between each of them, and a shield covering the ground wire and the connection part of the two DC cut elements. Communication device. 4. The two-wire power feeding communication device according to claim 3, wherein the DC cut element has a capacitor. 5. A two-wire type power supply communication device having a two-wire type transmission line, a plurality of power supply devices for supplying direct current to the transmission line, and a plurality of communication devices for communicating via the transmission lines, Each power supply device is connected to a power supply unit that generates a DC power supply, a power supply voltage adjustment unit that constantly controls the voltage from the power supply unit, and two transmission lines, and measures the current from the power supply unit within a fixed range. Power supply current control unit that controls the power supply, a power supply unit that supplies a constant voltage and a constant current from the power supply unit to the transmission line, a signal transmission unit that guarantees the transmission of signals from each communication device, and a signal transmission Between the two parts and the transmission line, the primary side coil is connected to the output end of the signal transmission part, and the secondary side coil is connected to the central part with a sufficiently large-capacity capacitor to form two parts. A transformer that is equally divided and has sufficient transparency in the communication frequency band , 2-wire, characterized in that it has a connection line for connecting the ends of both ends and the capacitor of the power supply voltage regulator power supply communication unit. 6. A power supply communication device having a two-wire type transmission line, a plurality of power supply devices for supplying direct current to the transmission line, and a plurality of communication devices for communicating via the transmission lines, at least 1. The power supply device of the power receiving device detects the power failure of the power source and its recovery, and receives the detection result of the power failure recovery detecting unit, and at the time of power failure and recovery, each communication device can receive predetermined power ON / OFF via the transmission line. The communication device has a power supply control unit that sends an OFF control signal, and the communication device receives the above-described power reception ON / OFF control signal via a transmission line and a transmission line, and recognizes the contents. It has a power receiving ON / OFF control signal accepting unit and a power failure recovery power receiving control unit that controls power receiving and stopping of the power receiving unit based on the recognition result of the power receiving ON / OFF control signal accepting unit. A two-wire power feeding communication device characterized in that 7. The power supply control unit includes a packet creation unit that creates a packet including a header part, a code number part, and a power reception ON / OFF signal text part that controls power reception ON / OFF based on a predetermined rule. Then, the power receiving ON / OFF control signal accepting unit recognizes that the received power ON / OFF control signal is included in the header portion of the received packet, and validates the packet by the recitation number portion of the packet. Recognize
Receiving O by the power receiving ON / OFF signal part of the packet
7. The two-wire power feeding communication device according to claim 6, further comprising a packet recognition unit that recognizes control contents regarding N / OFF.