JPH11239225A - Centralized supervisory system and transmitter-receiver for the system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a centralized supervisory system with a simple configuration that can extend transmitters-receivers so as to satisfy the need of clients even when the number of clients is increased. SOLUTION: When each controllers 17a-17n provided to pluralities of telephone lines 15a-15n with one-to-one sends notice data via corresponding telephone line, each transmitter-receiver sets 11a-11n provided with one-to-one correspondence and connecting with a common bus 12 receives notice data from a corresponding controller via each telephone line and sends the received notice data to the common bus. A 1st personal computer 13a connects with the common bus and receives the notice data from each transmitter-receiver sets, and manages the received notice data from each controller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a centralized monitoring system for performing automatic meter reading and the like, and a transmitting and receiving device in a centralized monitoring system for receiving report data from a controller provided in each meter for meter reading and transmitting the data to a host computer.

[0002]

2. Description of the Related Art In a centralized gas monitoring system for performing automatic meter reading of a gas using a telephone line, a centralized monitoring center and a plurality of controllers and a gas meter as a plurality of terminal devices are provided.

The centralized monitoring center has a transmission / reception device, a host computer, and the like. The transmission / reception device receives report data such as gas meter reading information and gas leak detection information from a plurality of controllers. It manages each received report data.

In this centralized monitoring system, when the number of gas consumption destinations (gas meters) increases, the number of reports to the centralized monitoring center increases. Therefore, it was necessary to increase the number of telephone lines according to the number of reports.

Further, in the conventional centralized monitoring system, only a port to which a modem or a transmission / reception device can be connected is provided, and the number thereof is about one to three. For this reason, the number of line connection ports of the transmission / reception device is increased, or a plurality of transmission / reception devices are installed using a multiplexer.

FIG. 5 shows a conventional centralized gas monitoring system in which a plurality of transmission / reception devices are installed using a multiplexer.
In FIG. 5, when each of the gas meters 108a to 108n detects a gas leak, each of the controllers 107a to 107n
Send information to.

[0007] Each of the controllers 107a-107
n is a centralized monitoring center 1 that transmits report data including a user ID, such as gas leak detection information, in a predetermined message format via the public telephone network 106 and the corresponding telephone lines 105a to 105n.
Send to 00.

[0008] Then, the plurality of transmission / reception devices 101a to 101n in the centralized monitoring center 100 receive report data such as gas leak detection information from the corresponding plurality of controllers 107a to 107c.

The plurality of transmitting / receiving apparatuses 101a to 101a to
1n to each multiplexer 1n.
02a is selected and received by the first personal computer 103a via the RS-232C cable 102b. Further, the first personal computer 103a
Displayed the received notification data on a display unit (not shown) to monitor each terminal device.

[0010]

However, in the conventional centralized monitoring system, the number of telephone lines that can be added is at most about eight. Also, multiplexer 1
The device like 02a had to be newly installed.

If the multiplexer 102a fails for some reason, a plurality of transmission / reception devices 101
Each report data from a to 101n cannot be transferred to the first personal computer 103a, and the centralized monitoring center will not function.

Further, a plurality of transmitting / receiving apparatuses 101a to 101a
Each report data from 1n is RS-232C cable 10
2b, the communication amount of the RS-232C cable 102b becomes very large, and the limit of the data processing in the first personal computer 103a is accelerated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a centralized monitoring system having a simpler configuration and a transmitter / receiver in the system, in which a transmitter / receiver corresponding to the consumer can be added when the number of consumers increases. .

[0014]

The present invention has the following arrangement to solve the above problems. The invention according to claim 1 is provided with a plurality of terminal devices provided in one-to-one correspondence with a plurality of telephone lines, each of which transmits report data via the corresponding telephone line, and a one-to-one correspondence with the plurality of terminal devices. Provided in correspondence,
And a plurality of transmitting and receiving devices connected to a common bus, each receiving report data from the corresponding terminal device via the telephone line, and transmitting the received report data to the common bus, and connected to the common bus. And a management device that receives the report data from each of the plurality of transceiver devices and manages the received report data of each of the terminal devices.

According to the present invention, each of the plurality of terminal devices provided in one-to-one correspondence with the plurality of telephone lines transmits the report data via the corresponding telephone line, and communicates with the plurality of terminal devices on a one-to-one basis. Each of the plurality of transmitting / receiving devices provided correspondingly and connected to the common bus receives report data from the corresponding terminal device via the telephone line, transmits the received report data to the common bus, and connects to the common bus. The management device that has received the notification data from each of the plurality of transmission / reception devices and manages the notification data of each terminal device.

That is, since each of the plurality of transmission / reception devices is directly connected to the common bus, the conventional multiplexer is not required, and even if the number of terminal devices increases, the number of transmission / reception devices corresponding to the number of the terminal devices increases. The number of devices can be increased, and a centralized monitoring system with a simpler configuration can be provided.

According to a second aspect of the present invention, each of the plurality of transmission / reception devices and the management device creates packet data in which a destination address and a transmission source address are added to the report data, and the created packet data A bus transmission control unit that controls transmission to the common bus, and a bus reception unit that monitors the destination address in packet data on the common bus, and controls reception of the packet data when the destination address matches its own address. And a control unit.

According to the present invention, each bus transmission control unit includes:
It creates packet data in which a destination address and a source address are added to the report data, and controls transmission of the created packet data to a common bus.

That is, since communication processing is performed for each transmission / reception apparatus, no special load is applied to a specific apparatus, and even if one transmission / reception apparatus fails, communication processing with another transmission / reception apparatus can be performed. It is possible to prevent the centralized monitoring center from functioning.

According to a third aspect of the present invention, there is provided a bus reception control unit for monitoring the destination address in the packet data on the common bus, and controlling the reception of the packet data when the destination address matches the own address. It is characterized by the following.

According to the present invention, the bus reception control unit monitors the destination address in the packet data on the common bus,
Since reception control of the packet data is performed when the destination address matches the own address, the management device can manage the report data of each transmission / reception device, and can perform system management for each transmission / reception device.

According to a fourth aspect of the present invention, there is provided a transmission / reception apparatus in a centralized monitoring system provided for each of a plurality of terminal apparatuses and connected to a common bus, wherein a report sent from the terminal apparatus is provided. A terminal reception control unit that controls reception of data via a telephone line, and a report data received by the terminal reception control unit, to a management device connected to the common bus and for managing report data of each terminal device. A bus transmission control unit for controlling transmission via the common bus.

According to the present invention, in each transmission / reception device, when the terminal reception control unit controls reception of the report data transmitted from the terminal device via the telephone line, the bus transmission control unit causes the terminal reception control unit to The transmission of the received report data to a management device connected to the common bus and managing the report data of each terminal device is controlled via the common bus. That is, since each transmitting / receiving device is directly connected to the common bus, the conventional multiplexer is not required, and even when the number of terminal devices increases, the number of transmitting / receiving devices can be increased according to the number of the terminal devices. A transmission / reception device having a simple configuration can be provided.

According to a fifth aspect of the present invention, the bus transmission control section creates packet data in which a destination address and a transmission source address are added to the report data, and controls transmission of the created packet data to the common bus. It is characterized by the following.

According to the present invention, each bus transmission control unit includes:
It creates packet data in which a destination address and a source address are added to the report data, and controls transmission of the created packet data to a common bus.

That is, since communication processing is performed for each transmission / reception apparatus, no special load is applied to a specific apparatus, and even if a new transmission / reception apparatus breaks down, communication processing can be performed with another transmission / reception apparatus. In addition, it is possible to prevent the centralized monitoring center from functioning.

According to a sixth aspect of the present invention, there is provided a bus reception control unit for monitoring the destination address in the packet data on the common bus, and receiving and controlling the packet data when the destination address matches the own address. It is characterized by the following.

According to the present invention, the bus reception control unit monitors the destination address in the packet data on the common bus,
Since reception control of the packet data is performed when the destination address matches the own address, the management device can manage the report data of each transmission / reception device, and can perform system management for each transmission / reception device.

[0029]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a centralized monitoring system according to an embodiment of the present invention; FIG. 1 is a block diagram showing the configuration of a centralized monitoring system according to the present invention. The centralized monitoring system is, for example, a centralized gas monitoring system that centrally monitors report data such as gas meter reading information and gas leak detection information.

In this centralized gas monitoring system, FIG.
As shown in FIG. 1, the centralized monitoring center 10 is connected to the common bus 12 and has a plurality of transmitting / receiving devices 11a to 11n for transmitting and receiving data. The central monitoring center 10 is connected to the common bus 12 and serves as a management device for managing data. It has one personal computer 13a and a second personal computer 13b.

A common bus 12, a plurality of transmitting / receiving apparatuses 11a to
11n, a first personal computer 13a, and a second personal computer 13b construct a local area network (LAN), and a plurality of transmitting / receiving apparatuses 11a to 11n and the first personal computer 13
a and the second personal computer 13b can exchange data with each other. LAN
Is, for example, Ethernet.

The plurality of transmitting / receiving apparatuses 11a to 11n have telephone lines 15 corresponding to the plurality of transmitting / receiving apparatuses 11a to 11n.
a to 15n are connected, and these telephone lines 15a to 15n
Is connected to the public telephone network 16 and the public telephone network 1
6 are connected to controllers 17a to 17n and gas meters 18a to 18n as terminal devices.

The transmission / reception devices 11a to 11n perform automatic dialing and connect to the controllers 17a to 17n via telephone lines 15a to 15n and a public telephone line network 16,
Gas meter 18a for controllers 17a to 17n
-18n, requesting gas reading information, etc., controlling a plurality of incoming calls via the telephone lines 15a-15n from the controllers 17a-17n, and receiving report data from the controllers 17a-17n.

Each of the controllers 17a to 17n has a communication function, and transmits / receives communication data corresponding to report data such as gas meter reading value information and gas leak detection information by a terminal transmission.
n.

A telegram in communication between the transmitting / receiving devices 11a to 11n and the controllers 17a to 17n includes a user ID indicating an identification number of a gas consuming destination (user) and report data.

FIG. 2 is a block diagram showing the configuration of the transmitting / receiving apparatus. The transmission / reception devices 11a to 11n include a modem board 21,
A main board 25 connected to the modem board 21;
LAN board 28 connected to the main board 25
Is configured.

The modem board 21 modulates and demodulates data and controls a telephone line. Main board 25
Has a central processing unit (CPU) 26 and a memory 27.

The memory 27 includes controllers 17a to 17
n to store the report data. The CPU 26 includes a transmission / reception control unit 31, a LAN board control unit 32, and a memory control unit 3.
4

The transmission / reception controller 31 includes a controller 17a
17n to receive the report data from the LAN board 2
8 or a request from the first personal computer 13a or the second personal computer 13b via the LAN board 28 to send notification data to the controllers 17a to 17n.

The LAN board control section 32 controls the LAN board 28. The memory control unit 34 includes the memory 27
The writing of the notification data to the memory 27 and the reading of the notification data stored in the memory 27 are controlled.

The LAN board 28 is a TCP / IP (T
transmission control proto
LA for col internet protocol)
N board, the main board 25 and the common bus 12
And a control area network (CAN) 30 for controlling a network (common bus).

The LAN board 28 includes the main board 25
, And creates packet data including the report data, the destination address, and the source address, and transfers the created packet data to the common bus 12.

The LAN board 28 monitors the destination address in the packet data, and when the destination address matches the own address, receives the packet data.

The first personal computer 13
a and the second personal computer 13b are also LAN
Similarly to the communication function of the service board 28, it creates packet data including data, a destination address and a source address, and transfers the created packet data to the common bus 12.

The first personal computer 13
a and the second personal computer 13b monitor the destination address in the packet data, and receive the packet data when the destination address matches its own address.

FIG. 3 shows the format of the packet data. As shown in FIG. 3, the packet data includes an SFD, a destination address, a transmission source address, notification data, and an FCS.

SFD is a frame start delimiter (Sta).
rt Frame Delimiter), which is an identification code indicating the start of a frame and is composed of, for example, an 8-bit bit string. The receiving side receives this bit string and recognizes that the code and subsequent codes are valid frames.

The destination address represents the address of the receiving terminal, and the source address represents the address of the transmitting terminal. F
CS is an abbreviation of a frame check sequence, and performs a CRC check to detect bit errors in a destination address, a source address, and the like. The CRC check uses, for example, a 32nd-order generator polynomial.

Next, the operation of the centralized monitoring system will be described with reference to the flowchart of FIG. For example, each of the controllers 17a to 17n transmits, and transmits report data such as gas meter reading information, gas leak detection information, and the like, and data including a user ID via a corresponding telephone line 15a to 15n in a telegram (step S11). ).

Then, in each of the transmission / reception devices 11a to 11n, the CPU 26 receives the message from the corresponding controller 17a to 17n via the modem board 21 (step S13).

Next, in each of the transmission / reception devices 11a to 11n, the memory control unit 34 writes the received report data in the memory 27 (step S15), and the LAN board 28 transmits the report data stored in the memory 27. Input (step S17).

Further, each LAN board 28 creates packet data by adding a destination address and a transmission source address to the received report data (step S19).
For example, all the LAN boards 28 set, for example, the address of the first personal computer as the destination address. Then, each LAN board 28 confirms that the common bus 12 is empty, and sends out the created packet data to the common bus 12 (step S2).
1).

On the other hand, the first personal computer 13
a and the second personal computer 13b constantly monitor the destination address of the packet data and determine whether or not the destination address is its own address (step S23).

If the destination address matches the own address, the packet data is received (step S2).
5). As described above, all the LAN boards 28
Since, for example, the address of the first personal computer is set as the destination address, the first personal computer 13a receives each packet data from each LAN board 28.

Then, the first personal computer 1
3a extracts each report data from each received packet data (step S27), displays each report data on a display unit (not shown), or stores each report data in a storage unit (not shown) (step S29).

As described above, the plurality of controllers 17a to 17a
17n transmits the notification data via the corresponding telephone line, and each of the plurality of transmission / reception devices 11a to 11n connected to the common bus 12 causes the corresponding controller 1
The report data is received from 7a to 17n via a telephone line, and the received report data is transmitted to the common bus 12.

Then, the first personal computer 13a connected to the common bus 12 is connected to each transmitting / receiving device 11a.
11n, and manages the received report data of the controllers 17a to 17n.

That is, since each of the transmitting and receiving devices 11a to 11n is directly connected to the common bus 12, a multiplexer as in the related art is not required, and even if the number of controllers increases, the number of transmitting and receiving devices corresponding to the number of controllers increases. And a centralized monitoring system with a simpler configuration can be provided.

Further, it creates packet data in which a destination address and a transmission source address are added to the report data, and controls transmission of the created packet data to the common bus 12.

That is, since communication processing is performed for each transmission / reception apparatus, no special load is applied to a specific apparatus, and even if one transmission / reception apparatus fails, communication processing can be performed with another transmission / reception apparatus. It is possible to prevent the centralized monitoring center 10 from functioning.

Further, the destination address in the packet data on the common bus 12 is monitored, and when the destination address matches the own address, the reception control of the packet data is performed.
The first personal computer 13a and the second personal computer 13b are connected to each of the transmitting / receiving devices 11a to 11a.
n can be managed, and the transmission / reception devices 11a to 11a to
The system can be managed every 11n.

Next, the first personal computer 13
The transmission operation of the second personal computer 13b will be described. Here, the transmitting operation of the first personal computer 13a will be described.

First, the first personal computer 13
“a” creates a packet data including a command and a destination address and a transmission source address, and transmits the created packet data to the common bus 12. In this case, the address of each of the transmitting / receiving apparatuses 11a to 11n is set as the destination address.

Then, in each of the transmission / reception devices 11a to 11n, the LAN board 28 constantly monitors the destination address of the packet data on the common bus 12, and determines whether or not the destination address is its own address.

In each of the transmitting / receiving apparatuses 11a to 11n, L
When the destination address matches the own address, the AN board 28 receives the packet data, extracts a command from the packet data, and transmits the command to the main board 25.

The command received by the transmission / reception control unit 31 is transmitted to, for example, the modem board 21, so that the modem board 21 performs automatic dialing. Then, since the controllers 17a to 17n receive the data via the telephone line, the no-ringing communication can be started.

The present invention is not limited to the above embodiment. In the embodiment, the gas centralized monitoring system has been described as an example. However, the present invention is not limited to this. For example, the present invention may be applied to a water supply centralized monitoring system or the like.

[0068]

According to the present invention, each of a plurality of terminal devices provided in one-to-one correspondence with a plurality of telephone lines transmits report data via the corresponding telephone line, and communicates with the plurality of terminal devices. Each of a plurality of transmission / reception devices provided in one-to-one correspondence and connected to the common bus receives report data from a corresponding terminal device via a telephone line, transmits the received report data to the common bus, The management device connected to the terminal receives the report data from each of the plurality of transmission / reception devices, and manages the report data of each terminal device.

That is, since each of the plurality of transmission / reception devices is directly connected to the common bus, the conventional multiplexer is not required, and even if the number of the terminal devices increases, the number of transmission / reception devices corresponding to the number of the terminal devices is increased. The number of devices can be increased, and a centralized monitoring system with a simpler configuration can be provided.

Each bus transmission control section creates packet data in which a destination address and a transmission source address are added to the report data, and controls transmission of the created packet data to the common bus.

That is, since communication processing is performed for each transmission / reception apparatus, no special load is applied to a specific apparatus, and even if one transmission / reception apparatus fails, communication processing with another transmission / reception apparatus can be performed. It is possible to prevent the centralized monitoring center from functioning.

The bus reception control unit monitors the destination address in the packet data on the common bus and, when the destination address matches the own address, controls the reception of the packet data. It is possible to manage the report data of the device, and to manage the system for each transmitting and receiving device.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of a centralized monitoring system of the present invention.

FIG. 2 is a configuration block diagram of a transmission / reception device in the centralized monitoring system shown in FIG.

FIG. 3 is a diagram showing a format of packet data.

FIG. 4 is a flowchart illustrating an operation of the centralized monitoring system according to the embodiment;

FIG. 5 is a block diagram showing a configuration of a conventional centralized gas monitoring system in which a plurality of transmission / reception devices are installed using a multiplexer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Centralized monitoring center 11a-11n Transceiver 12 Common bus 13a First personal computer 13b First personal computer 15a-15n Telephone line 16, Public telephone line network 17a-17n Controller 18a-18n Gas meter 21 Modem board 25 Main board 26 , 29 CPU 27 memory 28 LAN board 30 CAN 31 transmission / reception control unit 32 LAN board control unit 34 memory control unit 102a multiplexer 102b RS-232C cable

Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04Q 9/02 H04Q 9/02 B

Claims (6)

[Claims] 1. A plurality of terminal devices provided in a one-to-one correspondence with a plurality of telephone lines, each of which transmits report data via the corresponding one of the telephone lines, and a one-to-one correspondence with the plurality of terminal devices. A plurality of transmission / reception devices provided and connected to a common bus, each receiving report data from the corresponding terminal device via the telephone line, and transmitting the received report data to the common bus; And a management device connected to the plurality of transmission / reception devices for receiving the notification data from the transmission / reception devices of the plurality of transmission / reception devices and managing the received notification data of the terminal devices. 2. The apparatus according to claim 1, wherein each of the plurality of transmission / reception apparatuses and the management apparatus generates packet data in which a destination address and a transmission source address are added to the report data, and transmits the generated packet data to the common bus. The centralized monitoring system according to claim 1, further comprising a bus transmission control unit for performing transmission control. 3. A bus reception control unit for monitoring the destination address in the packet data on the common bus and receiving and controlling the packet data when the destination address matches the own address. The centralized monitoring system according to claim 2. 4. A transmission / reception device in a centralized monitoring system provided for each terminal device of a plurality of terminal devices and each connected to a common bus, wherein report data sent from said terminal device is transmitted to a telephone line. A terminal reception control unit that controls reception via the common bus, a report data received by the terminal reception control unit is connected to the common bus, and a management device for managing report data of each terminal device via the common bus. A transmission / reception device in a centralized monitoring system, comprising: 5. The bus transmission control unit generates packet data in which a destination address and a transmission source address are added to the notification data, and controls transmission of the generated packet data to the common bus. A transmitting / receiving device in the centralized monitoring system according to claim 4. 6. A bus reception control unit that monitors the destination address in packet data on the common bus and controls reception of the packet data when the destination address matches its own address. A transmitting / receiving device in the centralized monitoring system according to claim 5.