JPH11215574A - Method for storing data in central supervisory system, data transmitter-receiver and data terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the reliability by preventing accidental erasure of notice data which may be due to the occurrence of a communication error or a storage error. SOLUTION: In the data transmitter-receiver in the central supervisor system, where notice data received from a terminal 7 are stored in a memory 17 and the notice data stored in the memory are sent to the data terminal 3 in response to a data transmission request from the data terminal and a storage section 37 stores the data, and a reception control section 21 discriminates whether or not a delete instruction to delete notice data stored in the memory is received from a data terminal 3. When the reception control section 21 discriminates reception of the delete instruction from the data terminal 3, discriminating that the notice data have successfully stored in the storage section, a data delete section 24 deletes the notice data stored in the memory.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided in a centralized monitoring center for performing automatic meter reading and the like, receives report data including emergency information from a terminal device provided in each meter reading meter, and transmits it to a data terminal device. The present invention relates to a data storage method in a centralized monitoring system, a data transmitting / receiving device, and a data terminal device performing data communication with the data transmitting / receiving device.

[0002]

2. Description of the Related Art In a centralized monitoring system that performs automatic meter reading of gas or water using a telephone line, as shown in FIG.
1. Connect an RS-232C cable 1
And a data terminal device 103 such as a host computer connected via the Internet. The centralized monitoring center 100 includes telephone lines 104a to 104n, a public telephone network 10
5. Terminal devices 107a to 107n such as gas meters are connected via telephone lines 106a to 106n.

[0003] The centralized monitoring center 100 is called a center-side facility and is installed in a gas security company or the like, and performs centralized monitoring of automatic meter reading, security, and the like for terminal devices. For this purpose, the data transmission / reception device 101 in the centralized monitoring center 100 receives gas meter reading information and gas leak detection information of a plurality of terminal devices, and transmits data from the data terminal device 103 to the terminal devices.

Next, the operation of the data transmitting / receiving device 101 will be described. First, when each terminal device detects a gas leak,
Each terminal device transmits report data including a user ID, such as gas leak detection information, in a predetermined message to a centralized monitoring center via a telephone line or a public telephone line network.

[0005] The data transmission / reception device 101 in the centralized monitoring center 100 receives report data such as gas leak detection information from the terminal device in the form of a message, and stores the received message in the memory 104.

FIG. 6 shows a transition diagram of a report data state during data communication between the data transmitting / receiving apparatus 101 and the data terminal apparatus 103. Referring to FIG. 6, data transmitting / receiving apparatus 101
Data communication between the terminal and the data terminal device 103 will be described. In FIG. 6, a black part indicates data storage, and a white part indicates data deletion.

First, in (11), when there is a data transmission request from the data terminal apparatus 103 to the data transmission / reception apparatus 101, the data transmission / reception apparatus 101 reads out the notification data stored in the memory 104.

Next, in (12), the data transmitting / receiving apparatus 101 transmits the report data to the data terminal apparatus 103, and deletes (clears) the report data stored in the memory 104 after the data transmission is completed. .

[0009] Further, the data terminal device 103 uses the RS-232.
The notification data transferred from the data transmission / reception device 101 via the C cable 102 is stored in a storage unit 105 such as a recording medium.
Will be saved.

[0010]

However, in the conventional centralized monitoring system, the data transmitting / receiving device 101
If a communication error between the terminal and the data terminal device 103 or a storage error in the storage unit 105 occurs,
As shown in (13), saving the report data to the storage unit 105 fails.

Further, since the report data is deleted from the memory 104, it is not possible to report to an attendant in the event of an emergency report such as a gas leak, which has seriously hindered the centralized monitoring system.

According to the present invention, the reliability can be improved by preventing report data from being deleted when a communication error occurs with the data terminal device or when a report data storage error occurs in the data terminal device. It is an object to provide a data storage method, a data transmission / reception device, and a data terminal device in a monitoring system.

[0013]

The present invention employs the following means in order to solve the above-mentioned problems. According to the first aspect of the present invention, the report data received from each of the plurality of terminal devices is stored in the storage unit, and the report data stored in the storage unit in response to the data transmission request from the data terminal device is transmitted to the data terminal. In a data storage method in a centralized monitoring system for transmitting to a device and storing the report data in a storage unit in a data terminal device, a deletion command for deleting notification data stored in the storage unit is received from the data terminal device. And determining that the notification data has been successfully stored in the storage unit when it is determined that the deletion command has been received from the data terminal device, and deleting the notification data stored in the storage unit. It is characterized by.

According to a second aspect of the present invention, it is determined whether or not the report data retransmission request has been received from the data terminal device, and if it is determined that the report data retransmission request has been received from the data terminal device. The notification data stored in the storage unit is retransmitted.

According to a third aspect of the present invention, the report data received from each of the plurality of terminal devices is stored in the storage unit, and the report data stored in the storage unit in response to the data transmission request from the data terminal device is stored. In a centralized monitoring system for transmitting data to the data terminal device by the transmission control unit and storing the data in the storage unit in the data terminal device, the data transmission / reception device transmits an erasure command for erasing report data stored in the storage unit to the data terminal. A reception determining unit that determines whether or not the notification data has been received from the terminal device, and that the notification data has been successfully stored in the storage unit when the reception determination unit has determined that the erasing command has been received from the data terminal device. A data erasing unit for determining and erasing the notification data stored in the storage unit.

According to the present invention, the reception determining unit determines whether or not an erasure command for erasing the notification data stored in the storage unit has been received from the data terminal device. When the unit determines that the deletion command has been received from the data terminal device, it determines that the notification data has been successfully stored in the storage unit, and deletes the notification data stored in the storage unit.

That is, since the report data is stored in the storage unit until the erasure command is received, the report data deletion which occurs at the time of communication error with the data terminal device or at the time of the report data storage error in the data terminal device is performed. The notification data can be reliably stored in the data terminal device, and the reliability can be improved.

According to a fourth aspect of the present invention, the reception determining section determines whether or not the retransmission request for the report data has been received from the data terminal device. When it is determined that the retransmission request for the report data has been received from the data terminal device, the report data stored in the storage unit is retransmitted.

According to the present invention, the reception determining unit determines whether or not a request for retransmission of report data has been received from the data terminal device. If it is determined that it was received from the device,
Since the report data stored in the storage unit is retransmitted, the report data can be stored in the storage unit of the data terminal device.

According to a fifth aspect of the present invention, a data transmission request is issued by a transmission control unit to a data transmission / reception device having a storage unit for storing report data received from each of a plurality of terminal devices. In the data terminal device in the centralized monitoring system that saves the notification data received from the storage unit, a storage determination unit that determines whether the storage of the notification data received from the data transmission / reception device in the storage unit is successful or unsuccessful, An erasure command unit for transmitting an erasure command for erasing the notification data stored in the storage unit to the data transmission / reception device when the storage determination unit determines that the storage of the notification data in the storage unit is successful; And characterized in that:

According to the present invention, the storage determination unit determines whether the storage of the report data received from the data transmitting / receiving device in the storage unit is successful or unsuccessful, and the erasure command unit uses the storage determination unit to store the report data. When the storage in the storage unit is determined to be successful, an erasing command for erasing the notification data stored in the storage unit is transmitted to the data transmission / reception device, so that the notification data can be securely stored in the storage unit and the data transmission / reception can be performed. The report data stored in the storage unit in the device can be deleted.

According to a sixth aspect of the present invention, when the storage determining unit determines that the storage of the report data in the storage unit has failed, the transmission control unit transmits the report to the data transmitting / receiving apparatus. It is characterized by issuing a data retransmission request.

According to the present invention, the transmission control unit issues a retransmission request for report data to the data transmitting / receiving apparatus when the storage determination unit determines that the storage of the report data in the storage unit has failed. The report data can be received from the data transmitting / receiving device and stored in the storage unit.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a data storage method, a data transmission / reception device and a data terminal device in a centralized monitoring system according to the present invention will be described below with reference to the drawings. FIG.
1 shows a configuration block diagram of a centralized monitoring system including a data transmitting / receiving device of the present invention. Centralized monitoring systems, for example,
This is a centralized gas monitoring system for centrally monitoring report data such as gas meter reading information and gas leak detection information.

In this centralized gas monitoring system, FIG.
As shown in (1), the data transmission / reception device 1 is provided in the centralized monitoring center 1a, and has a first modulation / demodulation unit 11a, a second modulation / demodulation unit 11b, and a third modulation / demodulation unit 11c.

The telephone line 4a is connected to the first modem unit 11a, the telephone line 4b is connected to the second modem unit 11b, and the telephone line 4c is connected to the third modem unit 11c. These telephone lines 4a to 4c are connected to a public telephone network 5, and a telephone line 6 is connected to the public telephone network 5.
a to 6d are connected, and terminal devices 7a to 7d are connected in a one-to-one correspondence with the telephone lines 6a to 6d.

The data transmission / reception device 1 performs automatic dialing and connects to the terminal devices 7a to 7c via the telephone lines 4a to 4c, the public telephone network 5, and the telephone lines 6a to 6c.
Requests such as gas metering information to the terminal devices 7a to 7c, and telephone lines 4a to 4c from the terminal devices 7a to 7c.
, And receives report data from the terminal devices 7a to 7c.

Each of the terminal devices 7a to 7c is a gas meter having a controller having a communication function. The terminal device 7a to 7c transmits to the data transmitting and receiving device 1 an electronic message including report data of emergency information such as gas meter reading value information and gas leak detection information by a terminal transmission. I do. This message includes a user ID indicating the identification number of the user of each of the terminal devices 7a to 7c, and report data.

The data transmitting / receiving apparatus 1 includes a first modem 1
1a, a second modem 11b, a third modem 11c,
A central processing unit (CPU) 16 and a memory 17 connected to these modems via a bus 14 are provided.
Controls input and output between the CPU 16 and the data terminal device 3
An RS-232C interface unit (RS-232C I / F) 18 is provided. The memory 17 stores report data from the terminal devices 7a to 7c.

The CPU 16 has a transmission control unit 20, a reception control unit 21, an I / F control unit 22 for controlling the RS-232C I / F 18, a memory control unit 23, and a data erasing unit 24.
The transmission control unit 20 transmits the report data stored in the memory 17 to the data terminal device 3 in response to a data transmission request or a retransmission request from the data terminal device 3.

The reception control unit 21 receives report data from the terminal device 7a, receives a data transmission request, a retransmission request, and a data deletion command from the data terminal device 3. The memory control unit 23 controls writing of the notification data to the memory 17 and reading of the notification data from the memory 17. The data erasing unit 24 erases the notification data stored in the memory 17 in accordance with the erasing command received from the data terminal device 3.

A data transmitting / receiving device 1 is connected to a data terminal device 3 such as a host computer via an RS-232C cable 2.
Is connected. The data transmission / reception device 1 transmits / receives data such as notification data to / from the data terminal device 3 and includes a CPU 36 and a storage unit 37.

The CPU 36 has a transmission control unit 40, a reception control unit 41, a storage control unit 43, and an erasure command unit 44. The transmission control unit 40 transmits a data transmission request or a retransmission request to the data transmitting / receiving device 1. The reception control unit 41 receives report data from the data transmission / reception device 1.

The memory control unit 43 writes the notification data received by the reception control unit 41 into the memory 17 and controls it. The erasure command section 44 issues an erasure command for erasing the notification data stored in the memory 17 in the data transmitting / receiving device 1. Further, the transmission control unit 40 transmits the erasure command issued by the erasure command unit 44 to the data transmitting / receiving device 1.

Next, the operation of the data transmitting / receiving apparatus according to the embodiment configured as described above will be described with reference to the flowchart shown in FIG. First, when the terminal device 7a detects, for example, gas leak, the terminal device 7a transmits report data (report content) including the user ID and the gas leak detection information to the data transmitting / receiving device 1 via a telephone line in a telegram.

Then, in the data transmitting / receiving device 1, a message including the report data from the terminal device 7a is received by, for example, the first modem 11a (step S11), and the message is sent to the CPU 16. Then, the memory control unit 23
Causes the received notification data to be stored in the memory 17 (step S13).

Next, the reception control unit 21 determines whether a data transmission request has been made from the data terminal device 3 (step S15). If the transmission request flag sent from the data terminal device 3 is, for example, “1”, it is determined that there is a data transmission request. Then, when there is a data transmission request, the memory control unit 23 reads out the notification data from the memory 17 (Step S17).

Next, the transmission control unit 20 transfers the report data read from the memory 17 to the data terminal device 3 (step S19). Further, the reception control unit 21 determines whether or not there has been an erasing command from the data terminal device 3 (Step S21). When the deletion command flag sent from the data terminal device 3 is, for example, “1”, it is determined that there is a command to delete the notification data. Then, when there is an erasure command from the data terminal device 3, the data erasure unit 24 erases the notification data stored in the memory 17 (step S23).

On the other hand, when there is no erasure command from the data terminal device 3, for example, when a predetermined time has elapsed from the end of data transmission from the data transmitting / receiving device 1 to the data terminal device 3, the process returns to step S15.

That is, if an erasure command cannot be received after a predetermined time has elapsed, there is a possibility that a communication error or a storage error has occurred. I will wait.

Next, the operation of the data terminal device will be described with reference to the flowchart shown in FIG. First, the transmission control unit 40 transmits a data transmission request to the data transmitting / receiving device 1 (Step S31).

Next, the reception control unit 41 determines whether or not notification data has been received from the data transmitting / receiving device 1 (step S33). It is determined whether or not there is an error in saving the report data to (step S35).

If there is a storage error, it is determined that the storage of the report data in the storage unit 37 has failed (step S37).
Returning to step S31, a request for retransmission of the report data is made.

In step S33, when the notification data is not received, for example, when a predetermined time has elapsed since the request for transmission of the notification data is made, it is determined that a communication error has occurred and the notification data is stored in the storage unit 37 of the notification data. Is determined to have failed (step S37), the process returns to step S31, and a request for resending the report data is made.

On the other hand, if there is no storage error in step S35, the report data is stored in the storage unit 37, and it is determined that the storage was successful (step S39). And
The transmission control unit 40 transfers the erasure command issued by the erasure command unit 44 to the data transmitting / receiving device 1 (step S41).

Next, the communication between the data transmitting / receiving apparatus 1 and the data terminal apparatus 3 and the storage state of the report data will be described with reference to the report data state transition diagram shown in FIG. In FIG. 4, a black portion indicates data storage, and a white portion indicates data deletion. The memory 1 in the data transmitting / receiving device 1
It is assumed that report data is stored in 7.

First, in (1), the data terminal device 3
Requests the data transmission / reception device 1 to transmit report data. In (2), after receiving the transmission request, the data transmission / reception device 1 reads out the notification data from the memory 17 and
The report data is transmitted to the data terminal device 3.

At this time, in consideration of the case where the data cannot be stored due to a communication error or a storage error, even after transmitting the data, the notification data stored in the memory 17 is not deleted and the storage state is not changed. And keep it. In (3), the storage of the report data in the storage unit 37 of the data terminal device 3 fails.

Next, when the data storage fails,
In (4), a retransmission request is made from the data terminal device 3 to the data transmitting / receiving device 1. The data transmitting / receiving device 1
When receiving the retransmission request from the data terminal device 3, the storage unit 3
7 is determined to have failed to save the report data. And
In (5), retransmission of the report data is performed by the data terminal device 3.
Do for

Then, in (6), the data terminal device 3 succeeds in saving the report data in the storage unit 37 such as a hard disk. Further, in (7), the data terminal device 3 transmits an erasure command to the data transmitting / receiving device 1. In (8), when receiving the delete command from the data terminal device 3, the data transmitting / receiving device 1 determines that the report data has been successfully stored in the storage unit 37 and deletes the report data stored in the memory 17.

As described above, according to the data transmission / reception device of the embodiment, the notification data stored in the memory 17 in the data transmission / reception device 1 is stored until an erasure command from the data terminal device 3 is received. Therefore, a communication error with the data terminal device 3 or the storage unit 3 in the data terminal device 3
Even if the storage error of the report data in 7 occurs, the report data can be stored in the data terminal device 3 by retransmitting the report data.

Therefore, the deletion of the report data can be prevented, and the reliability of the centralized monitoring system can be improved.

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.

[0054]

According to the present invention, the reception determining unit determines whether or not an erasure command for erasing the notification data stored in the storage unit has been received from the data terminal device. When the reception determining unit determines that the deletion command has been received from the data terminal device, it determines that the notification data has been successfully stored in the storage unit, and deletes the notification data stored in the storage unit. That is, the notification data is stored in the storage unit until the erasure command is received, thereby preventing deletion of the notification data that occurs at the time of a communication error with the data terminal device or a storage error of the notification data in the data terminal device. Can be
The report data can be reliably stored in the data terminal device, and the reliability can be improved.

Further, the reception determining unit determines whether or not a request for retransmission of report data has been received from the data terminal device, and the transmission control unit has determined that the reception determination unit has received a request for retransmission of report data from the data terminal device. When the determination is made, the notification data stored in the storage unit is retransmitted, so that the notification data can be stored in the storage unit of the data terminal device.

The storage determining unit determines whether the storage of the report data received from the data transmitting / receiving device in the storage unit is successful or unsuccessful, and the erasure instruction unit uses the storage determination unit to store the report data in the storage unit. Is transmitted to the data transmission / reception device for erasing the notification data stored in the storage unit when it is determined to be successful, the notification data can be reliably stored in the storage unit, and the storage in the data transmission / reception device is performed. The notification data stored in the section can be deleted.

Further, the transmission control unit issues a request for retransmission of the report data to the data transmitting / receiving apparatus when the storage determining unit determines that the storage of the report data in the storage unit has failed. The report data can be received and the report data can be stored in the storage unit.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a centralized monitoring system including a data transmitting / receiving device of the present invention.

FIG. 2 is a flowchart illustrating an operation of the data transmission / reception device of the embodiment.

FIG. 3 is a flowchart illustrating an operation of the data terminal device.

FIG. 4 is a transition diagram of a report data state during data communication between the data transmitting / receiving device and the data terminal device according to the embodiment.

FIG. 5 is a configuration block diagram of a conventional centralized monitoring system.

FIG. 6 is a transition diagram of a report data state at the time of data communication between a conventional data transmitting / receiving device and a data terminal device.

[Explanation of symbols]

 Reference Signs List 1 data transmission / reception device 2 RS-232C cable 3 data terminal device 5 public telephone line network 4a-4c, 6a-6c telephone line 7a-7c terminal device 14 bus 16, 36 CPU 17 memory 20 transmission control unit 21 reception control unit 22 I / F control unit 23 memory control unit 24 data erasure unit 37 holding unit 43 storage control unit 44 erasure command unit

Claims (6)

[Claims] A storage unit stores report data received from each terminal device of a plurality of terminal devices, and transmits report data stored in the storage unit to the data terminal device in response to a data transmission request from the data terminal device. A data storage method in a centralized monitoring system for transmitting and storing in a storage unit in a data terminal device, comprising: determining whether an erasure command for erasing notification data stored in the storage unit has been received from the data terminal device. Determining, when determining that the erasure command from the data terminal device has been received, determining that the notification data has been successfully stored in the storage unit and deleting the notification data stored in the storage unit. Data storage method in a centralized monitoring system. And determining whether or not the request for retransmission of the notification data has been received from the data terminal device, and when determining that the request for retransmission of the notification data has been received from the data terminal device, storing the request in the storage unit. 2. The data storage method in the centralized monitoring system according to claim 1, wherein the transmitted report data is retransmitted. 3. The report data received from each terminal device of the plurality of terminal devices is stored in a storage unit, and the report data stored in the storage unit is transmitted by the transmission control unit in response to a data transmission request from the data terminal device. In the data transmitting and receiving apparatus in the centralized monitoring system for transmitting to the data terminal apparatus and storing it in the storage unit in the data terminal apparatus, an erasing instruction for erasing the notification data stored in the storage unit is received from the data terminal apparatus. A reception determination unit that determines whether or not the reception determination unit determines that the notification data has been successfully stored in the storage unit when the reception determination unit determines that the deletion instruction has been received from the data terminal device. And a data erasing unit for erasing notification data stored in the unit. 4. The reception determining unit determines whether a request for retransmission of the report data has been received from the data terminal device. The transmission control unit determines that the reception determination unit transmits a request for retransmission of the report data. 4. The data transmitting / receiving device in the centralized monitoring system according to claim 3, wherein when it is determined that the notification data is received from the data terminal device, the report data stored in the storage unit is retransmitted. 5. A transmission control unit issues a data transmission request to a data transmission / reception device having a storage unit for storing report data received from each of the plurality of terminal devices,
In a data terminal device in a centralized monitoring system that stores report data received from a data transmitting / receiving device in a storage unit, a storage determination that determines whether the storage of the report data received from the data transmitting / receiving device in the storage unit is successful or unsuccessful. And transmitting, to the data transmitting / receiving device, an erasure command for erasing the notification data stored in the storage unit when the storage determination unit determines that the storage of the notification data in the storage unit is successful. A data terminal device in a centralized monitoring system, comprising: an erasure command unit. 6. The transmission control unit issues a retransmission request for the report data to the data transmission / reception device when the storage determination unit determines that the storage of the report data in the storage unit has failed. The data terminal device in the centralized monitoring system according to claim 5, wherein: