JP3154952B2 - Terminal connection bank detection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal connection bank detecting method for detecting a bank to which a terminal transmitting and receiving a carrier signal superimposed on an AC power supply wave of a distribution line or a dedicated line is connected. It is.

[0002]

2. Description of the Related Art In a system using distribution line transport, as shown in FIG. 1, a control device 1 installed in an electric room of a condominium, for example, where a plurality of transformers are present, is received by a communication line 2. The devices 3a, 3b,..., 3n are connected. The receiving devices 3a to 3n are banks 4 of low-voltage distribution lines.
A terminal 6 (for example, the amount of power used by each consumer) that is installed one by one for each of a to 4n (for each area handled by the transformers 5a to 5n) and transmits / receives a carrier signal to / from each of the receiving devices 3a to 3n 1 is represented by one in FIG. 1, but a plurality of banks are connected to each of the banks 4a to 4n.

In the conventional distribution line transport method, when the control device 1 attempts to collect data from the terminal 6, the control device 1 sequentially or simultaneously receives the plurality of banks 4a,. , And sends data from the terminal 6 in response to the terminal calling signal to the receiving device 3.
a,.... Alternatively, the bank 4a to which the terminal 6 is connected is registered in the control device 1 in advance, and the terminal call signal is transmitted only to the bank 4a.

[0004]

In the above conventional method,
If the connection bank of terminal 6 is unknown, all banks 4
In order to send a terminal call signal to the terminals a to 4n, unnecessary terminal call signals are sent. In addition, since data from all the receiving devices 3a to 3n is collected, these data are It is necessary to check whether or not this is the case, and there is a problem that it takes time to collect data.

When the bank 4a to which the terminal 6 is connected is registered in the control device 1 in advance, it is necessary to register the connection bank of the terminal 6 in the control device 1 when the terminal 6 is installed. Since electric power companies outsource general distribution line work to contractors, the design drawings of the electric power company may not always match the actual construction results.
It is difficult to accurately and easily register a bank when installing a terminal. In some cases, the connection bank of the terminal 6 is changed due to the increase or decrease in the load, or the connection bank of the terminal 6 is newly established due to the addition of a transformer. May be performed in a department different from the management department of the distribution line transport system, and it is difficult for the management department of the distribution line transport system to always accurately grasp the connection bank of the terminal 6.

An object of the present invention is to provide a terminal connection bank detection method capable of accurately and easily detecting a bank to which a terminal is connected.

[0007]

To achieve the above object, according to the present invention, a control device is connected to each bank of a line on which an AC power supply wave is carried, one for each bank. For a plurality of receiving devices, a terminal call command for calling a target terminal is transmitted, and the plurality of receiving devices superimpose a terminal call signal on the AC power wave according to the terminal call command. Each of the receiving devices is transmitted to the bank to which the receiving device is connected in the form of a carrier signal, and the terminal connected to the bank receives the terminal paging signal. Is transmitted to the receiving device in the form of, and the receiving device that has received the response signal from the terminal transmits the response signal to the control device, and the control device connects the target terminal based on the content of the response signal. To detect the bank One in which the.

In order to achieve the above object, according to a second aspect of the present invention, in addition to the first aspect, a receiving apparatus which has received a response signal from a terminal has a reception level of the response signal. And sends the response signal and the reception level to the control device, and the control device detects the connection bank of the target terminal from the content of the response signal and the reception level.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a system using a distribution line carrier for carrying out the method of the present invention is similar to a conventional system and is shown in FIG. Where there are multiple transformers,
For example, a control device 1 installed in an electric room or the like of an apartment house is connected to the receiving devices 3a, 3b,. The receiving devices 3a to 3n are banks of low-voltage distribution lines 4a to
1 for each 4n (for each area served by transformers 5a to 5n)
The terminal 6 (for example, for reading the power consumption of each consumer) that is installed one by one and transmits / receives a carrier signal to / from each of the receiving devices 3a to 3n is represented by one in FIG. A plurality of banks are connected to each of the banks 4a to 4n. Note that the correspondence between the receiving devices 3a to 3n and the banks 4a to 4n is 1: 1.
, And the corresponding relationship is grasped by the control device 1.

An example of the method of the present invention will be described below with reference to FIG.

The control device 1 calls a terminal for calling the terminal 6 to the receiving devices 3a to 3n of a plurality of banks or all the banks 4a to 4n assumed to be connected to the target terminal 6. Sends a signal. An example of the signal configuration of the terminal call command 7 is as shown in FIG. 3, a start signal STX, a mode signal representing a bank detection mode, a terminal address signal representing an address of terminal 6, an end signal ETX, and an error check signal BCC. Consists of Receiving apparatuses 3a to 3n receive terminal calling command 7, and in response, receive terminal calling signal 8 in the form of a carrier signal superimposed on an AC power wave of a distribution line.
n to the banks 4a to 4n to which n is connected. An example of the signal configuration of the terminal call signal 8 is obtained by adding a receiving device address to the terminal call command 7 as shown in FIG.

When the terminal 6 receives the terminal call signal 8 and detects that the terminal address matches its own address, it sends a response signal 9 to the receiver 3a in the form of a carrier signal. An example of the signal configuration of the response signal 9 is the same as that of the terminal calling signal 8 shown in FIG. 4, and includes a receiving device address and a terminal address. The receiving device 3a that has received the response signal 9 from the terminal 6 measures the reception level (for example, −10 dBV) of the response signal 9 and stores it together with the content of the response signal 9.

After that, the control device 1 sends the data collection commands 10a to 10n to the receiving device 3a in anticipation of the timing.
To 3n sequentially (or simultaneously). In response, the receiving devices 3a to 3n transmit the collected signals 11a to 11n. The receiving device 3a of the bank 4a to which the terminal 6 is connected,
When detecting that the receiving device address included in the received data collection command 10a matches its own address, the control unit 1 sends the collected signal 11a including the content of the stored response signal 9 and the received level to the control device 1. An example of the signal configuration of the collection signal 11a of the receiving device 3a is as shown in FIG. 5, a start signal STX, a mode signal indicating the bank detection mode, a receiving device address signal indicating the addresses of the receiving devices 3a to 3n, and a terminal 6. , A reception level signal indicating a reception level, an end signal ETX, and an error check signal BCC. When detecting that the reception device address included in the received collection signal 11a matches the reception device address of the data collection command 10a, the control device 1 determines whether the reception level included in the collection signal 11a is equal to or higher than a specified level. Is registered, and it is registered that the terminal 6 is connected to the receiving device 3a, that is, the bank 4a, on condition that the level is equal to or higher than the specified level.

Since the terminal 6 is not connected to the banks 4b to 4n, the collected signals 11b from the receivers 3b to 3n
11n include signals indicating that there is no corresponding terminal as shown in FIG. In addition, all the receiving devices 3a to 3
If the collected signals 11a to 11n from n do not correspond to the corresponding terminal, the control device 1 determines that the terminal 6 is not registered, and the higher-level device of the control device 1 (for example, installed in a power company office or the like). To the central equipment).

In some cases, collected signals from a plurality of receiving devices include the contents of a response signal from the terminal 6. In such a case, as shown in FIG. 7, a call and a response are normally exchanged between the receiving device 3a and the terminal 6,
In the case of a nearby bank such as a condominium, the carrier signal is also transmitted to the high-voltage distribution line 12 and may leak as shown by a dotted line, so that a call and a response are performed between the receiving device 3b and the terminal 6. However, in this case, since the reception level of the reception device 3b is low and the difference from the normal reception level is 20 dBV or more, the collected signal 11a from the reception device 3a is employed depending on whether the reception level is equal to or more than the specified level. , The collected signal 11b from the receiving device 3b is not adopted.

After the bank registration, when the control device 1 collects data from the terminal 6 or causes the terminal 6 to perform load control, the control device 1 receives the data from the bank 4a to which the terminal 6 is connected. A command is sent only to the device 3a, and communication is performed only between the receiving device 3a and the terminal 6. As a result, the communication operation with the terminal can be performed at a high speed, and unnecessary transmission of a carrier signal can be suppressed. When communication becomes impossible, the terminal connection bank detection method described above is executed again, and the bank of the terminal 6 is re-registered. As a result, it is possible to always respond to a terminal change.

FIG. 8 is a block diagram showing an example of the control device 1. The connection terminal 13 is connected to a higher-level device (for example, a central device installed in an office of a power company) by a telephone line or the like. Commands from the host device input and output from the connection terminal 13 and data sent from the control device 1 are stored in the memory 15 via the external interface 14 or output from the memory 15. On the other hand, the connection terminal 16 is connected to the receiving devices 3a to 3n by the communication line 2. The terminal call command 7 and the data collection commands 10a to 10n output from the connection terminal 16 are formed by the arithmetic circuit 17, are sent to the receiving devices 3a to 3n via the communication interface 18, and are input from the connection terminal 16. Collected signals 11a to 11n from receiving devices 3a to 3n
Are decoded and collated by the arithmetic circuit 17 via the communication interface 18. As a result, terminal bank registration or non-registration is performed in the memory 15. The control circuit 19 controls all operations of the above circuits.

FIG. 9 is a block diagram showing an example of the receiving devices 3a to 3n. The connection terminal 20 is connected to a low-voltage distribution line. Response signal 9 from terminal input from connection terminal 20
The (carrier signal) is separated from the AC power wave by the filter 21, converted into a digital signal by the A / D conversion circuit 22, and stored in the memory 23. The reception level of the response signal 9 is measured by the arithmetic circuit 24 and stored in the memory 23. On the other hand, the connection terminal 25 is connected to the control device 1 by the communication line 2. A terminal call command 7 or a data collection command 10a from the control device 1 input from the connection terminal 25
10 to 10n are decoded by the arithmetic circuit 24 via the communication interface 26, and the terminal calling signal 8 is formed by the arithmetic circuit 24 and injected into the low-voltage distribution line by the transmission circuit 27. The collected signals 11 a to 11 n are formed by the arithmetic circuit 24 and transmitted from the connection terminal 25 to the control device 1 via the communication interface 26. The control circuit 28 controls all operations of the above circuits.

FIG. 10 is a block diagram showing an example of the terminal 6. The connection terminal 29 is connected to a low-voltage distribution line. The terminal calling signal 8 (carrier signal) from the receiving device 3a input from the connection terminal 29 is separated from the AC power wave by the filter 30, converted into a digital signal by the A / D conversion circuit 31, stored in the memory 32, and operated. The decoding and the collation of the terminal address are performed by the circuit 33. If the terminal addresses match, the response signal 9 is formed by the arithmetic circuit 33 and injected by the transmission circuit 34 into the low-voltage distribution line. The control circuit 35 controls all operations of the above circuits.

When there is no leakage of the carrier signal as shown in FIG. 7, it is not necessary to measure the reception level of the response signal 9 by the receiving devices 3a to 3n and transmit it to the control device 1.

[0021]

As described above, according to the first aspect of the present invention, at the beginning of communication, the control device instructs a plurality of receiving devices to call a target terminal, and provides a response to the calling. Since the connection bank of the terminal is detected based on the result, the connection bank of the terminal can be detected accurately and easily.

According to the present invention, the bank is detected not only by referring to the content of the response signal from the terminal but also by the reception level of the response signal. Even if a response signal of a target terminal is sent from the terminal, a response signal due to leakage can be excluded.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an example of a system using distribution line conveyance that implements the method of the present invention.

FIG. 2 shows an example of the method of the present invention.

FIG. 3 is a diagram illustrating a signal configuration example of a terminal call command.

FIG. 4 is a diagram illustrating a signal configuration example of a terminal call signal.

FIG. 5 is a diagram illustrating a signal configuration example of a collection signal of a receiving device.

FIG. 6 is a diagram illustrating a signal configuration example of a collection signal of another receiving device.

FIG. 7 is a diagram showing a leak state of a call and a response.

FIG. 8 is a block diagram illustrating an example of a control device.

FIG. 9 is a block diagram illustrating an example of a receiving device.

FIG. 10 is a block diagram illustrating an example of a terminal.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control device 2 Communication line 3a-3n Receiving device 4a-4n Bank 5a-5n Transformer 6 Terminal 7 Terminal call command 8 Terminal call signal 9 Response signal 10a-10n Data collection command 11a-11n Collection signal 12 High voltage distribution line

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04L 12/28 H04B 3/54

Claims (2)

(57) [Claims] The control device issues a terminal call command for calling a target terminal to a plurality of receiving devices connected one by one to each bank of a line on which an AC power supply wave is carried. Transmitting, the plurality of receiving devices transmit terminal calling signals in the form of carrier signals superimposed on the AC power supply wave to the banks to which the receiving devices are connected, respectively, in response to the terminal calling command, The terminal connected to receives the terminal call signal, and in the case of its own call, sends a response signal to the receiving device in the form of a carrier signal, and the receiving device that receives the response signal from the terminal And transmitting the response signal to the control device, and the control device detects a connection bank of a target terminal based on the content of the response signal. 2. The control device sends a terminal call command for calling a target terminal to a plurality of receiving devices connected one by one to each bank of a line on which an AC power supply wave is carried. Transmitting, the plurality of receiving devices transmit terminal calling signals in the form of carrier signals superimposed on the AC power supply wave to the banks to which the receiving devices are connected, respectively, in response to the terminal calling command, The terminal connected to receives the terminal call signal, and in the case of its own call, sends a response signal to the receiving device in the form of a carrier signal, and the receiving device that receives the response signal from the terminal , Measuring the reception level of the response signal, sending the response signal and the reception level to the control device, and the control device detects the connection bank of the target terminal from the content of the response signal and the reception level like Terminal connection bank detection method.