JP4457880B2 - Remote meter reading system - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a novel system that collects meter readings of an integrated watt-hour meter installed in each house or each tenant in an apartment house or building by using power line carrier communication.

  Currently, power line carrier communication is attracting attention as a communication method capable of performing communication using an existing power line as a medium, particularly in remote control / monitoring applications. The power line carrier communication referred to here is a communication method in the home or near field using a legally usable 10-450 kHz band, and is used for controlling home appliances and facilities.

  This communication method is a system on the premise of communication in a communication area between one bank (under one transformer). As shown in FIG. 9, transformers t1 and t2 are interposed between two communication devices a1 and a2, respectively. Even if communication is attempted across these transformers t1 and t2, transformer t1 , T2 has a large transmission loss and there is a lack of characteristics. Specifically, FIG. 9 shows a configuration in which electric power supplied from a medium-high voltage line (6600V) is converted into a low voltage (100V / 200V) by the transformers t1 and t2 and supplied to each door. Is an example in which the communication device a2 is connected to the subordinate of the transformer t2. In this configuration, when communication is performed between the two communication devices a1 and a2, the transmission loss L = L1 + L2 [dB] is about 40 to 60 [dB], and the signal attenuation is large.

Therefore, Patent Documents 1 to 3 show technologies that enable power line carrier communication between different banks. In these prior arts, an inter-transformer signal coupler is provided between the banks to pass a signal of a carrier frequency component in power line carrier communication and prevent a commercial frequency component from passing.
JP-A-8-18490 Japanese Patent Laid-Open No. 2003-258689 JP-A-60-233944

  By using the inter-transformer signal coupler as described above, power line carrier communication (beyond the transformer) between different banks can be performed. However, the actual situation is that no effective application has been proposed. In other words, for example, although some effects can be expected for control by power line carrier communication beyond the lighting equipment and air conditioner transformers in the building, it is technically possible to control home appliances beyond the home. It cannot be expected to have a very large effect.

  On the other hand, as a use other than the remote control / monitoring application, it is also conceivable to use power line carrier communication beyond the transformer as a medium for information communication in the Internet or LAN. However, in this case, there is a problem of communication distance, and as described above, it is not an effective application in the 10-450 kHz band that is currently legally usable in Japan.

  An object of the present invention is to provide a remote meter reading system that is an effective application of power line carrier communication across a transformer using an inter-transformer signal coupler.

The remote meter reading system of the present invention is a system for metering power consumption in each door or each tenant in an apartment house or building, and is built in an integrated watt-hour meter installed in each door or each tenant. Is installed in an electrical room in the apartment house or building, and connects between power distribution systems from a plurality of transformers, and passes a signal of a carrier frequency component in the power line carrier communication. And a signal coupler between the transformers that prevents the passage of commercial frequency components, and a main unit side communication that is connected to one of the power distribution systems, performs power line carrier communication with each of the slave unit side communication devices, and receives a meter reading result. a vessel seen including, said at least a portion of the transformer between the signal combiner includes a switch in series, the switch, at the time of collection of meter reading results of the slave side communication device in the power distribution system to be connected Form, at the time of non-collection characterized in that it opened.

  According to the above configuration, when the meter readings of the integrated watt-hour meter installed in each house or each tenant in the apartment house or building are remotely collected, first, the result of the meter reading is transported to each integrated watt-hour meter. In addition to having a built-in handset-side communicator to communicate with, in an electrical room or the like in the apartment house or building, perform power line carrier communication with each handset-side communicator by polling or the like, and collect the meter reading results remotely. A base side communication device for receiving is provided.

  On the other hand, in the case of the power line carrier communication, if the distribution system is different, a transformer on the parent device side is connected between the distribution system to which the parent device side communication device is connected and the distribution system to which the child device side communication device is connected. It is necessary to pass through the transformer on the slave unit side through the high voltage side, and the signal loss reaches 40 to 60 dB. Therefore, in the electrical room where the distribution lines of each system are gathered, each distribution system is connected to the inside of the distribution board, etc., and the signal of the carrier frequency component in the power line carrier communication is allowed to pass, thereby preventing the passage of the commercial frequency component. By providing each inter-transformer signal coupler, a communication path that bypasses the transformer is formed, signal attenuation is suppressed, and communication reliability is ensured.

  Therefore, the base unit side communication device, for example, can remotely collect and measure the power consumption meter of all the houses or all tenants in the apartment house or building, and the inter-transformer signal coupler One of the effective applications of power line carrier communication using can be provided.

Further, at least part of the previous SL transformer between the signal combiner, the distribution system the base-side communication device is connected to a particular, between distribution system each slave side communication device is connected to the transformer signal coupling When connected through a transformer, a switch is provided in series in at least a part of the inter-transformer signal coupler, and by opening it, a distribution system to which the base unit side communicator is connected, All of the distribution systems to which the slave unit side communication devices are connected are not simultaneously connected via the inter-transformer signal couplers. For example, all inter-transformer signal couplers are equipped with the switches. Thus, only the power distribution system for which the meter reading results are to be collected can be connected to the power distribution system to which the base-side communication device is connected. Thereby, it is possible to minimize the impedance fluctuation of the power distribution system to which the master unit side communication device is connected, and to stabilize the transmission characteristics.

  In the remote meter-reading system of the present invention, the base-unit-side communicator controls the switch in the inter-transformer signal coupler in synchronization with the collection of the meter-reading results.

  According to the above configuration, each inter-transformer signal coupler is installed in the same electrical room as described above, and therefore, the control signal can be easily communicated wirelessly or wiredly with the base unit side communicator. It can be performed. Then, the parent-side communication device controls the switch in the inter-transformer signal coupler in synchronization with the collection of the meter reading result, thereby suppressing the impedance fluctuation of the distribution system to which the parent-side communication device is connected. The control of the switch for this can be automated.

  The switch may be controlled to be opened and closed by power line carrier communication. In that case, when the switch is opened from the distribution system of the parent device side communication device to the distribution system of the child device side communication device in which the inter-transformer signal coupler is provided in a plurality of stages, the subsequent stage Since the switch on the side becomes uncontrollable, the opening operation is performed in order from the terminal switch (distant from the power distribution system of the main unit side communication device), and the closing operation is performed on the base end (of the main unit side communication device). It is carried out in order from the switch on the side near the distribution system.

  Furthermore, the remote meter reading system according to the present invention includes an inter-transformer signal coupler having the switch between the power distribution system of the parent device side communication device and the power distribution system of each child device side communication device. , They are formed integrally with the base side communication device.

  According to said structure, the signal coupler between transformers which has the said switch is each provided between the power distribution system of the said main | base station side communication device, and the power distribution system of each cordless handset side communication device, ie, the parent device side Each inter-transformer signal coupler is connected in a star shape to the power distribution system of the communication device, and they are formed integrally with the parent device side communication device.

  Therefore, each inter-transformer signal coupler can be connected to the power distribution system of the master unit side communicator at the same time, and it is not necessary to connect each switch to the master unit side communicator. Therefore, construction becomes easy.

  In the remote meter reading system according to the present invention, the switching control means for controlling the switches of the inter-transformer signal couplers stores the switches that can allow the impedance variation even when simultaneously closed as a group. In the case of broadcast transmission from the base side communication device, group control is performed for the storage unit.

  According to the above configuration, the switching control means for controlling the switch of each inter-transformer signal coupler controls each switch individually at the time of collecting the meter reading results to eliminate data collision. A switch that can allow impedance fluctuations even when it is closed simultaneously with the storage means when transmitting signals such as signals that can start broadcasting data, etc. Are stored as a group, and these are controlled as a group.

  Therefore, broadcast transmission can be performed in a short time.

  Furthermore, in the remote meter reading system of the present invention, a self-address is set in advance in the switch in each inter-transformer signal coupler, and is expressed by an open / close control signal from an open / close control means for controlling the switch. The switching control means provided in the base unit side communication device writes the address number of the switch to be opened / closed in the switching control signal, and the number of switches It is characterized by delivering to all switches by broadcast from a smaller number of output ports.

  According to the above configuration, since the switching control means provided in the base unit side communication device controls each switch by addressing it, the control signal line necessary for controlling each switch is sent and wired. The number of the control signal lines can be less than the number of switches, preferably one, and the construction can be facilitated.

In the remote meter-reading system according to the present invention, the base unit side communicator is connected to an aggregation device on the power company side via a communication network.

  According to the above configuration, the base-side communicator is connected via a communication network to a totaling device provided on the power company side such as an organization that charges an electricity charge held by the power company itself or an affiliated company. Then, in response to a meter reading request from the counting device or at predetermined intervals, meter reading is performed from each slave unit side communication device, and the result is transmitted to the counting device.

  Therefore, even if a meter reader does not go to the housing complex or building, the base side communicator can relay and enable automatic meter reading by the counting device.

  In the remote meter-reading system of the present invention, the inter-transformer signal coupler is provided between a power distribution system of the parent device side communication device and a power distribution system of each child device side communication device, Two bank line capacitors each having one end connected to a set of distribution lines, a coil connected between the other ends of each bank line capacitor, and a core around which each coil is wound in common It is characterized by that.

  According to the above configuration, the inter-transformer signal coupler is provided between the power distribution system of the parent device side communication device and the power distribution system of each child device side communication device, that is, the power distribution of the parent device side communication device. Each inter-transformer signal coupler is connected to the grid in a star shape. Further, using a star-shaped connection configuration in which each inter-transformer signal coupler is connected to the distribution system of the base unit side communication device in a lump, one set in each distribution system All power distributions comprising two bank line capacitors each connected at one end to a distribution line, a coil connected between the other ends of each bank line capacitor, and a core around which each coil is wound in common Configure inter-transformer signal couplers for the system in a batch.

  Therefore, the bank line capacitor and the coil connected to the distribution system of the main unit side communication device in the inter-transformer signal coupler can be shared between the distribution systems of each of the slave unit side communication devices, and the coil can be shared. By utilizing and winding it around one core, it is possible to further reduce the size of the inter-transformer signal coupler.

  As described above, the remote meter-reading system of the present invention collects meter readings of integrated watt-hour meters installed in each house or each tenant in an apartment house or building remotely. Incorporate a slave unit side communicator that communicates the meter reading result with power line carrier, and in the electrical room or the like in the apartment house or building, perform power line carrier communication with each slave unit side communicator by polling etc. In the electrical room where the main unit side communication device that collects and receives remotely is collected and the distribution lines of each system are gathered, each distribution system is connected within the distribution panel etc., and the carrier frequency component in the power line carrier communication Inter-transformer signal couplers that allow signals to pass and prevent the passage of commercial frequency components are provided, thereby forming a communication path that bypasses the transformer, suppressing signal attenuation, and ensuring communication reliability To secure.

  Therefore, the base unit side communication device, for example, can remotely collect and measure the power consumption meter of all the houses or tenants in the apartment house or building, and the inter-transformer signal coupling One of the effective applications of power line carrier communication using a device can be provided.

In addition, at least a part of the inter-transformer signal coupler is connected to the power distribution system to which the base unit side communicator is connected in particular, and the power distribution system to which each slave unit side communicator is connected is the inter-transformer signal coupler. Each of the inter-transformer signal couplers is provided with a switch in series, and is opened so that the power distribution system to which the master unit-side communication device is connected is connected to the slave unit. All of the distribution systems to which the side communicators are connected are not connected via the inter-transformer signal coupler at the same time. For example, all inter-transformer signal couplers are equipped with the switches. In addition, it is possible to connect only the power distribution system that should collect the meter reading results to the power distribution system to which the master unit side communication device is connected. Thereby, it is possible to minimize the impedance fluctuation of the power distribution system to which the master unit side communication device is connected, and to stabilize the transmission characteristics.

[Embodiment 1]
1 and 2 are block diagrams showing the electrical configuration of the remote meter reading system according to the first embodiment of the present invention. This remote meter reading system is a system for remotely metering power consumption in each house or each tenant in an apartment house or building. First, the distribution system is connected to n or high voltage, for example, 6600V lead-in line 1 with n units. This is an n-channel configuration in which distribution lines F1 to Fn (hereinafter collectively referred to as reference symbol F) are connected via transformers T1 to Tn (when generically referred to as reference symbol T below). Each distribution line F is connected to one or more integrated watt-hour meters (not shown) installed in each door or each tenant, and the load in each door or each tenant is connected via the total watt-hour meter. Electric power can be supplied to the equipment.

  In each of the integrated watt-hour meters, the handset-side communication devices A11 to A1i; A21 to A2j; A31 to A3k;. , Each of which is indicated by reference symbol A). On the other hand, any of the distribution lines (F1 in FIG. 1 and FIG. 2) is connected to a parent device side communication device A0 that performs power line carrier communication with each of the child device side communication devices A and receives a meter reading result. . Each slave device side communication device A transmits the meter reading result to the master device side communication device A0 in response to polling from the master device side communication device A0 or at predetermined intervals.

  And with respect to the distribution line F1 to which the main | base station side communication apparatus A0 is connected, the remaining distribution lines F2-Fn pass the signal of the carrier frequency component in the said power line carrier communication, and block the passage of a commercial frequency component. Inter-transformer signal couplers B2, B3,..., Bn (when collectively referred to as reference symbol B below) are connected via a detour communication path, compared with the transformer T and the lead-in line 1, Signal attenuation is suppressed, and communication quality between the parent device side communication device A0 and each child device side communication device A is ensured. Each inter-transformer signal coupler B is connected to, for example, two hot-side wires (with an effective line voltage of 200 V) among the single-phase three-wire distribution wires F. In FIG. 1 and FIG. The neutral line in is omitted.

  It should be noted that in the present invention, the inter-transformer signal coupler B is provided in the distribution board 3 of the electrical room 2 where the distribution lines F are gathered in the apartment house or building as shown in FIG. The base unit side communication device A0 is also installed in the electric room 2. For example, n is 4 or 5, and i, j, k, and m are 15 to 20, and for example, 80 slave device side communication devices A are connected to one master device side communication device A0. It is possible.

  1 and FIG. 2 are different in the insertion site of each inter-transformer signal coupler B. FIG. 1 shows a distribution line in which the inter-transformer signal coupler B2 in the first stage is connected to the parent-side communication device A0. F1 is connected between the next distribution line F2, and the next-stage inter-transformer signal coupler B3 is connected between the distribution line F2 and the next distribution line F3. This is an example of so-called crossover connection in which the inter-signal coupler Bn is connected between the immediately preceding distribution line Fn-1 and its final distribution line Fn. FIG. 3 also corresponds to FIG. 1 with n = 5. On the other hand, FIG. 2 is a so-called one in which the remaining distribution lines F2 to Fn are respectively connected to the distribution line F1 to which the base-unit-side communication device A0 is connected by the inter-transformer signal couplers B2 to Bn. This is an example of a star connection.

  In the star connection, as the number of inter-transformer signal couplers B increases, the parallel impedance with respect to the distribution line F1 to which the parent-side communication device A0 is connected is equivalently increased. Although the impedance of the distribution line F1 is lower than the impedance of the remaining distribution lines F2 to Fn, the communication quality with each slave unit side communication device A is substantially equal. On the other hand, the crossover connection can make the impedances of the distribution lines F1 to Fn substantially equal, but the more the distribution line at the end (the farther from the base unit side communication device A0), the more the signal coupler B between the transformers. The communication quality is different between the distribution lines F2 to Fn. The crossover connection and the star connection may be determined according to the number n of the distribution lines F to perform power line carrier communication. If the number n is small, the star connection is preferable, and if the number n is large, the cross connection is preferable. They are suitable and may be used in any combination.

  The inter-transformer signal coupler B includes bank line capacitors C11, C12; C21, C22 each having one end connected to two sets of distribution lines F, and the other ends of the bank line capacitors C11, C12; C21, C22. A coupling transformer T0 having coils L1 and L2 connected therebetween is provided. Each of the bank line capacitors C11, C12; C21, C22 passes the signal of the carrier frequency component in the power line carrier communication as described above, for example, 0.1 to 0.47 μF in order to prevent the passage of the commercial frequency component. Conforms to safety standards or has a withstand voltage characteristic suitable for AC voltage. In the coupling transformer T0, the turns ratio of the coils L1 and L2 is 1: 1, for example, and has a characteristic of signal coupling with high impedance in the signal band of power line carrier communication.

  By configuring as described above, the parent device side communication device A0 is not only connected to the child device side communication devices A11 to A1i of the distribution line F1 to which it is connected, but also to the child device side communication of the other distribution lines F2 to Fn. Meters A21 to A2j; A31 to A3k;..., An1 to Anm can also be collected remotely and metered. Thereby, the base station side communication device A0, for example, can measure the power consumption of all the houses or tenants in the apartment house or building, and the meter reader is installed in the electric room 2. The meter reading can be completed simply by reading the meter reading result from the parent device side communication device A0. Thus, one of the effective applications of power line carrier communication using the inter-transformer signal coupler B can be provided.

  In addition, the base unit side communication device A0 is connected to a totaling device provided on the power company side such as an organization that charges an electricity charge owned by the power company itself or an affiliated company, etc. via a communication network such as a telephone network. Then, in response to a meter reading request from the counting device or every predetermined period, meter reading may be performed from each slave unit side communication device A, and the result may be transmitted to the counting device.

  By comprising in this way, even if a meter-reader does not go to the said housing complex or a building, the said main | base station side communication apparatus A0 can relay, and the automatic meter-reading by the said totaling apparatus can be enabled.

  Here, since power line carrier communication can be performed if it is a device connected to an existing power line, it is conceivable that the power company directly measures the power consumption of each house or each tenant. However, power line carrier communication is a short-range communication method, which is not realistic. Since the present invention performs meter reading in the electric room 2 from which the distribution lines F to the respective doors and tenants are drawn, the power line carrier communication can be used.

[Embodiment 2]
FIG. 4 is a block diagram showing an electrical configuration of a remote meter reading system according to the second embodiment of the present invention. This remote meter reading system is similar to the remote meter reading system shown in FIG. 2 described above, and corresponding portions are denoted by the same reference numerals and description thereof is omitted. It should be noted that in this remote meter reading system, the inter-transformer signal couplers B2 to Bn have switches R2 to Rn in series (hereinafter collectively referred to as reference symbol R). When the relay coil M is excited / demagnetized by the control signal from the base unit side communication device A0 via the control signal lines S2 to Sn, the relay contact SW interposed in the distribution line F is It is controlled to close when the meter reading result of the machine side communication device A is collected and open when not collecting. The switch R may be composed of a switch element such as a transistor or a MOSFET.

  In the example of FIG. 4, the distribution lines F <b> 2 to Fn to which the slave unit side communication devices A <b> 21 to Anm are connected to the distribution line F <b> 1 to which the master unit side communication device A <b> 0 is connected as shown in FIG. It is premised on the configuration of the star connection connected via the inter-signal couplers B2 to Bn, and by opening the switches R2 to Rn, the distribution line F1 is connected to the total of the distribution lines F2 to Fn. Are not connected at the same time, and only the distribution line for which the meter reading result is to be collected can be connected to the distribution line F1.

  As a result, it is possible to minimize the impedance fluctuation of the distribution line F1 to which the parent device side communication device A0 is connected, and to stabilize the transmission characteristics. As shown in FIG. 4, instead of providing the switches R2 to Rn to all the inter-transformer signal couplers B2 to Bn, if the impedance variation can be tolerated, some transformers The switch may not be provided for the inter-signal coupler.

  In addition, by utilizing the fact that each inter-transformer signal coupler B is installed in the same electrical room 2 as described above, the parent-side communication device A0 is wireless or wired (wired in FIG. 3), By simply controlling the switch R, it is possible to automate the control of the switch R for suppressing fluctuations in the impedance of the distribution line F1 to which the parent communication device A0 is connected. Furthermore, the switch R may be controlled to be opened and closed by power line carrier communication.

[Embodiment 3]
5 and 6 are block diagrams showing an electrical configuration of a remote meter reading system according to the third embodiment of the present invention. This remote meter reading system is similar to the remote meter reading system shown in FIG. 3 described above, and corresponding portions are denoted by the same reference numerals and description thereof is omitted. It should be noted that in the configuration in which the inter-transformer signal coupler B is connected in the star shape, in the system shown in FIG. 5, the switch R is integrally formed with the base unit side communication device A0 as the base unit side communication unit U1. In the system shown in FIG. 6, the inter-transformer signal coupler B is also integrally formed as the base unit side communication unit U2.

  Accordingly, the switches R2 to Rn can be connected to the distribution line F1 of the base unit side communication device A0, and the control signal lines S2 to Sn are connected to the switches R2 to Rn. Since it is not necessary to perform the work, the construction becomes easy.

[Embodiment 4]
FIG. 7 is a block diagram showing an electrical configuration of a remote meter reading system according to the fourth embodiment of the present invention. This remote meter reading system is similar to the remote meter reading system shown in FIG. 6 described above, and corresponding portions are denoted by the same reference numerals and description thereof is omitted. It should be noted that in this system, each inter-transformer signal coupler B as shown in FIG. 6 is connected in a lump to the distribution line F1 of the parent-side communication device A0. This means that one coupling transformer T0 ′ is used between the distribution lines F by using the configuration.

  Therefore, the inter-transformer signal coupler B0 has two bank line capacitors C11, C12; C211, C212; C221, C222;...; C2n1, C2n2, one end of which is connected to each distribution line F. The coupling transformer T0 ′ is included. As shown in FIG. 8, the coupling transformer T0 ′ includes coils L10, L21, L22,..., L2n (n = 6 in FIG. 8) connected between the other ends of the bank line capacitors C11 to C2n2. ) And a core 10 around which the coils L10, L21 to L2n are wound in common.

  Therefore, the bank line capacitors C11 and C12 and the coil L10 connected to the distribution line F1 of the base unit side communication device A0 in the inter-transformer signal coupler B0 are connected between the distribution lines F2 to Fn of each slave unit side communication device A. In addition to being shared, the coil transformer L10 can be shared and wound around one core 10 to further reduce the size of the coupling transformer T0 ′ and the inter-transformer signal coupler B0. .

  Also, in the remote meter reading system according to the present embodiment, it should be noted that each switch R is provided with a controller 12, and correspondingly, the master unit side communication device A0 is provided with a controller 11. The common control signal line S0 is routed between them. Each controller 12 has a self-address set in advance, and is configured to be able to understand the address number represented by the open / close control signal from the controller 11 serving as the open / close control means. The open / close control signal corresponding to the self-address is displayed. When received, the relay coil M is energized / demagnetized to close the relay contact SW. The controller 11 addresses the switch R to be controlled, and transmits the switching control signal to the controller 12.

  With this configuration, the control signal line S0 necessary for controlling each switch R can be sent and wired, and the control signal line S0 is less than the number of switches R, preferably One can be made and construction can be facilitated.

  Furthermore, in the remote meter reading system according to the present embodiment, the controller 11 stores, for example, a group of switches as shown in Table 1 that can permit impedance fluctuations even when they are closed simultaneously. In the case of broadcast transmission from the base unit side communication device A0, they may be group-controlled.

With this configuration, the controller 11 that controls each switch R controls each switch R individually when collecting the meter reading results to eliminate data collision. and signal to start working to aggregate data when transmission of broadcast transmission also possible signal, to group control, it is possible to perform broadcast transmission in a short time.

It is a block diagram which shows the electric constitution of the remote meter-reading system which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the electric constitution of the remote meter-reading system which concerns on the 1st Embodiment of this invention. It is a top view which shows an example of the electrical room in an apartment house or a building. It is a block diagram which shows the electric constitution of the remote meter-reading system which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows the electric constitution of the remote meter-reading system which concerns on the 3rd Embodiment of this invention. It is a block diagram which shows the electric constitution of the remote meter-reading system which concerns on the 3rd Embodiment of this invention. It is a block diagram which shows the electric constitution of the remote meter-reading system which concerns on the 4th Embodiment of this invention. It is a figure which shows the coil | winding structure of the coupling transformer used for the remote meter-reading system which concerns on the 4th Embodiment of this invention. It is a block diagram which shows the general power distribution system in an apartment house or a building.

DESCRIPTION OF SYMBOLS 1 Lead-in line 2 Electrical room 3 Distribution board 10 Core 11, 12 Controller A0 Base unit side communication apparatus A11-A1i; A21-A2j; A31-A3k; ...; An1-Anm
Slave unit side communication devices B0, B2, B3,..., Bn Transformer signal couplers C11, C12; C21, C22 Bank line capacitors C211, C212; C221, C222;
Bank line capacitors F1 to Fn Distribution lines L1, L2 Coils L10, L21, L22,..., L2n coils M Relay coils R2 to Rn Switches S0, S2 to Sn Control signal lines SW Relay contacts T0, T0 ′ Coupling transformer T1 ~ Tn Transformer U1, U2, U3 Base unit side communication unit

Claims (7)

A system for metering the amount of power consumed in each house or tenant in an apartment house or building,
A built-in watt-hour meter installed in each door or each tenant, and a handset-side communicator that communicates the power metering result with a power line, and
A transformer that is installed in an electrical room in the apartment house or building, connects between distribution systems from a plurality of transformers, passes a signal of a carrier frequency component in the power line carrier communication, and blocks the passage of a commercial frequency component Between signal couplers,
Connected to any of the distribution system, it performs the child-side communication device and the power line communication, seen including a base-side communication device for receiving the meter reading results,
At least a part of the inter-transformer signal coupler has a switch in series, and the switch is closed when collecting the meter reading results of the slave unit side communication device in the connected distribution system, and when not collecting A remote meter reading system characterized by opening . The base-side communication device, in synchronization with the acquisition of the meter reading results, the remote meter reading system according to claim 1, wherein the controlling the switch in the transformer between the signal combiner. An inter-transformer signal coupler having the switch is provided between a power distribution system of the parent device side communication device and a power distribution system of each child device side communication device, and they are integrated with the parent device side communication device. remote meter reading system according to claim 1 or 2, wherein the forming. The switching control means for controlling the switch of each inter-transformer signal coupler has storage means for storing as a group switches capable of allowing impedance fluctuations even if they are simultaneously closed, and the master unit side The remote meter reading system according to any one of claims 1 to 3 , wherein in the case of broadcast transmission from a communicator, they are group-controlled. The switches in each inter-transformer signal coupler are set in advance so that self-addresses are set in advance, and the address numbers represented by the switching control signals from the switching control means for controlling the switches are understood. The switching control means provided in the base unit side communication device writes the address number of the switch to be opened / closed in the switching control signal, and from the number of output ports less than the number of switches, The remote meter reading system according to any one of claims 1 to 4 , wherein the remote meter reading system is distributed to all switches. The remote meter-reading system according to any one of claims 1 to 5, wherein the base unit side communication device is connected to an aggregation device on the electric power company side via a communication network . The inter-transformer signal coupler is provided between a power distribution system of the parent device side communication device and a power distribution system of each child device side communication device, and one end is connected to one set of distribution wires in each distribution system. claim 1-6, characterized with two banks line cAPACITOR, it said coil being connected between the other end of each bank line capacitors, by comprising a core which each coil is commonly wound The remote meter reading system according to any one of the above.

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