JP3594876B2 - Remote monitoring and control device connected to wireless network and terminal device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a remote monitoring control device connected to a wireless network that performs charging according to the amount of data and a terminal device that transmits and receives data via a serial line in a non-procedural manner, and particularly to a terminal that transmits and receives data in a non-procedural manner. The present invention relates to a remote monitoring and control device that controls a device and a wireless network to smoothly communicate with a master station.
[0002]
[Prior art]
In recent years, a scheme has been established in which a terminal and a master station communicate using the Internet.
[0003]
The Internet is a global network in which personal computer communication networks such as a commercial Internet, an academic-related Internet, a PC-VAN, and a NIFTY-Serve are interconnected, each of which is a unique communication protocol.
[0004]
In addition, a system in which a computer is incorporated into an existing device (for example, a pump control device or the like) that transmits data in a non-procedure manner, and the terminal communicates with the master station via a network such as the Internet or a LAN is provided. In some cases.
[0005]
In other words, even in such a system, communication between computers using a wire is used, so that a unique communication protocol is used.
[0006]
For this reason, in order to smoothly communicate with various systems, a protocol conversion device is provided in a network and a terminal.
[0007]
[Problems to be solved by the invention]
In recent years, a network system using a wireless network (DoPa network) such as a PHS and a mobile phone has been receiving attention.
[0008]
This is due to the fact that, since the usage-based charging is based on the data amount, communication can be performed without taking care of time and distance, and high-speed data transmission is possible even in a wireless network.
[0009]
However, the above-described protocol conversion device performs a protocol conversion for smoothly performing communication between the terminal and the master station when a terminal having a communication protocol that is incompatible with each other and the master station are connected by wire. Therefore, if the network is a wireless network, it cannot be used.
[0010]
In addition, since the master station and the terminal connected to the wireless network have their own communication protocols, there is a problem that even if the network is a wireless network, a converter must be separately provided.
[0011]
Further, the master station generally has only the function as the master station, and the slave station has only the function of the slave station.
[0012]
However, since the master station has to communicate with various slave stations of the constructed system, there is a problem that the master station is overloaded.
[0013]
Also, when the terminal is connected to various control devices and sensors, it is necessary to monitor the status of these control devices and sensors and perform predetermined control. However, there was a problem that the terminal would be overloaded if the message was sent.
[0014]
Particularly, in manhole pump equipment used as a sewage pumping device for efficient maintenance of small-scale sewers, in recent years, as shown in FIG. 8, serial data from a pump sensor in a manhole facility is transmitted to a control panel. The central control device receives the data and sends it to the central monitoring device via the public network, and sends control data from the central monitoring device to the pump or the like of the manhole facility via the public network.
[0015]
In such a system, a computer capable of communicating with the central monitoring device via a wired network is attached to the control panel. In other words, using a conventional facility that controls manhole facilities with serial data, data such as the time of failure occurrence, details, data storage, and flow rate management are sent to the central monitoring device.
[0016]
In such a system as well, the communication protocol is the communication protocol of the specification of the company A in which the control panel is arranged. Further, even if a protocol converter is used, there is a problem that the protocol converter cannot be used in a wireless network such as a Dopa network because the protocol converter is compatible with a cable.
[0017]
The present invention has been made to solve the above problems, and even in a system using a wide area wireless network, a remote system that can easily reduce the load on terminals and a master station without requiring special equipment or the like. The aim is to obtain a control device.
[0018]
[Means for Solving the Problems]
Claim 1 is a wireless network for charging according to the amount of data, a terminal device for transmitting and receiving data via a serial line in a non-procedural manner, and a remote device for connecting a line using a mobile phone to a network comprising a master station. It is a monitoring control device.
[0019]
The remote monitoring control device is provided between the mobile phone and the terminal device . This remote monitoring control device includes means for monitoring whether there is data to be sent from the terminal device or whether there is a line connection request from the master station. Means for connecting the line to the master station via the wireless network by the ppp protocol after connecting the line to the telephone, and requesting the master station for a synchronization segment after connecting the line to the master station. client mode next performed to establish a TCP connection Te, and means for transmitting data from the terminal device in a packet format of the TCP / IP protocol, after the establishment of the TCP connection, the packet format of the TCP / IP protocol from the host station When the data is received, the data is divided into byte units, and the byte unit data is transmitted to the terminal device without procedure. Means for, when the said apparatus is connected the portable telephone, wireless network, a master station and line, when the data sent from said terminal device to said master station is not present even after the lapse of a predetermined time, the TCP Means for disconnecting the connection;
Immediately after the disconnection of the TCP connection, there is provided a means for setting the apparatus to a server mode in which the apparatus enters a state of waiting for reception of the synchronous segment, and re-establishing the TCP connection .
[0021]
Furthermore, the gist is that the terminal device is a pump monitoring panel that receives data from each sensor of the pump unit or data from the master station and controls each valve of the pump unit.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The terminal according to the present embodiment transmits and receives data through a serial line such as a pump control panel, a printer, a surveillance camera, or a handy terminal of a manhole facility without any procedure.
[0023]
FIG. 1 is a schematic configuration diagram of a remote monitoring control device according to an embodiment of the present invention.
[0024]
The remote monitoring control device 1 is connected to a mobile phone 3 for connecting a line to a wireless network 2 (Dopa network) and a terminal 4 for transmitting and receiving data in a non-procedural manner. It has a function of making and receiving calls to and from the wireless network 2 and functions as a client device to transmit data. When receiving data from the center 5, it functions as a server and transmits the data to the terminal 4 without procedure. I do.
[0025]
The center 5 is connected to a router 6 connected to the wireless network 2 via a LAN 7.
[0026]
The above-mentioned terminal 4 is connected to the remote monitoring and control device 1 by RS232C, and is a pump control panel, a printer, a monitoring camera, a handy terminal, a sensor, or the like that does not have a communication protocol for connecting to an intranet environment.
[0027]
As shown in FIG. 1, the remote monitoring control device 1 performs waveform shaping of non-procedural data from the terminal 4 and sequentially stores the data in the reception buffer 11, and the data is stored in the reception buffer 11. A data division processing unit 12 that divides a plurality of nonprocedural data into a predetermined number of data and sends the data to a TCP / IP transmission processing unit 20, which will be described later, and restores data from the TCP / IP transmission processing unit 20 A data transmission processing unit 13 for storing the data in the transmission buffer 14, a non-procedural conversion unit 15 for dividing the data into one byte each time the data is transmitted to the transmission buffer 14, 4 and a data transmission processing unit 16 for sending the data to the data transmission unit 4.
[0028]
The TCP / IP transmission processing unit 20 establishes a normal data control and a connection-oriented virtual communication path while maintaining the reliability of the communication path from the start to the end of the communication, and provides all upper-layer users with the upper-layer user. Transmission control protocol (TCP) for performing a duplex / bidirectional stream service (transmitted as a simple bit string and transmitted in byte units), and controls transmission and reception of data packets within and between networks (IP address, IP data IP (Internet protocol) for disassembling and assembling and controlling a communication path until data reaches a partner.
[0029]
Further, it includes a client mode processing unit 17, a server mode processing unit 18, and a client / server selection processing unit 19.
[0030]
The client / server selection processing unit 19 monitors the TCP / IP transmission processing unit 20 and activates the client mode processing unit 17 when sending data to the server.
[0031]
When there is data to be sent to the terminal, the client / server selection processing unit 19 activates the server mode processing unit 18.
[0032]
When selected by the client / server selection processing unit 19, the client mode processing unit 17 transmits a synchronization segment, receives an acknowledgment of the synchronization segment from the receiving side, and then establishes a TCP connection to establish an IP address to be connected. Login to server.
[0033]
When selected by the client / server selection processing unit 19, the server mode processing unit 18 puts the TCP / IP transmission processing unit 20 into a TCP session request waiting state. Then, when there is a TCP session request, an acknowledgment is returned, data is received, and data of a processing result according to the received data is transmitted to the terminal.
[0034]
The AT command connection processing unit 22 connects a line with the mobile phone 3 and the wireless network 2 using an AT command protocol.
[0035]
The ppp connection processing unit 23 (point to point protocol) establishes a line with the wireless network 2.
[0036]
The AT command connection processing unit 22 and the ppp connection processing unit 23 are collectively referred to as a line connection processing unit 25. Further, the line connection processing unit 25 has a process of activating the AT command connection processing unit 22 and the ppp connection processing unit 23 at regular intervals to connect the line with the center side.
[0037]
The non-procedural conversion processing unit 15 extracts a TCP header, an IP header, and a ppp frame from data (referred to as TCP data in the present embodiment) from the TCP / IP transmission processing unit 20 and divides the data into 1-byte units to transmit buffers. 14 is stored.
[0038]
The operation of the remote monitoring control device configured as described above will be described below with reference to the sequence diagram of FIG.
[0039]
The line connection processing unit 25 of the remote control device 1 (also simply referred to as the present device) activates the AT command connection processing unit 22 at regular time intervals, and sets the center telephone number in the AT command connection processing unit 22.
[0040]
The AT command connection processing unit 22 causes the mobile phone 3 to make a dial call with the set telephone number (d1), and establishes a line connection with the center 5 via the wireless network 2 (d2). Then, when the response code (CD code) is transmitted from the mobile phone 3 (d3), it is determined that the connection to the wireless network 2 is established. Next, the PPP connection processing unit 23 is activated to establish a ppp link with the wireless network 2 (d4).
[0041]
Then, non-procedural data from the pump control panel, which is the terminal 4, is sent to the TCP / IP transmission processing unit 20 via the data reception processing unit 10, the reception buffer 11, and the data division processing unit 12 (d5). , The client / server switching processing unit 19 activates the client mode processing unit 17.
[0042]
Next, the client mode processing unit 17 uses the TCP / IP transmission processing unit 20 to request the center 5 to make a TCP connection request and establish a connection (d6). That is, the present apparatus is a client machine.
[0043]
Then, each time non-procedural data is received from the terminal 4, the data is transmitted by TCP / IP (d7). At this time, nonprocedural data in the receiving buffer 11 is accumulated, and the data is divided into a predetermined number of units and transmitted with an IP address added thereto.
[0044]
The above data transmission process (d7) will be described in detail below with reference to FIGS.
[0045]
For example, as shown in FIG. 3, non-procedural data from the terminal is digitally converted by an A / D converter (not shown), and the non-procedural data is sequentially stored in the reception buffer 11 by the reception processing unit 10. (S20).
[0046]
That is, as shown in FIG. 4, non-procedure 1-byte data is sequentially stored in the reception buffer 10.
[0047]
Next, the line connection processing unit 25 determines whether a ppp link has been established (S30), and if not established, the line connection processing unit 25 automatically performs mobile communication using AT command processing and ppp connection processing. A line connection with the telephone 3, the wireless network 2, and the center 5 is established (S40), and thereafter, a client mode is set (activation of the client mode processing unit), and a TCP connection is established as described above (S50).
[0048]
If it is determined in step S30 that the ppp link has been established, the process immediately proceeds to step S50 to establish a TCP connection.
[0049]
Then, a preset IP address of the server is read from a ROM (not shown) (S60).
[0050]
Next, the data division processing unit 12 divides the plurality of nonprocedural data stored in the reception buffer 10 into a predetermined number as a set as shown in FIG. 4B (S70). In FIG. 4B, eight sets of nonprocedural data are set as one set.
[0051]
Then, as shown in FIG. 4C, a packet in which an IP header and a TCP header based on the read IP address are added to a predetermined number of nonprocedural data is generated (S80). Is transmitted to the center 5 via the server (S90).
[0052]
Further, when the TCP / IP transmission processing unit 20 receives TCP data from the center 5 via the wireless network 2 and the mobile phone 3 when the apparatus 1 is a client machine (d8), this data becomes The non-procedural processing unit 15 removes the TCP header, the IP header, and the ppp frame, and sends them to the terminal 4 via the transmission buffer 14 and the data transmission processing unit 16 in 1-byte units.
[0053]
For example, as shown in FIG. 5A, when TCP data to which an IP header and a TCP header are added is received from the center 5 via the wireless network 2 and the mobile phone 3, the data restoration processing unit shown in FIG. As shown in (b), the IP header and the TCP header are extracted and restored, and these are stored in the transmission buffer 14 as shown in (c) of FIG.
[0054]
The non-procedural conversion unit 15 extracts a plurality of data stored in the transmission buffer 14 byte by byte as shown in FIG. 5D and sends out the non-procedural data to the terminal side.
[0055]
If no data is transmitted from the terminal 4 for a certain period, the disconnection monitoring timer (not shown) of the line connection processing unit 25 automatically operates, and the TCP connection with the center 5 is disconnected (d9).
[0056]
At this point, a TCP connection is automatically established such that the center 5 becomes a client and the device 1 becomes a server (d10).
[0057]
In other words, while the line between the device 1 and the center 5 is connected via the mobile phone 3 and the wireless network 2, the TCP connection is disconnected, and the device 1 becomes a server and the center 5 becomes a client. To establish a TCP connection.
[0058]
That is, the client / server selection processing unit 19 selects the server mode processing unit 18 and places the TCP / IP transmission processing unit 20 in a state of waiting for a TCP session request, thereby becoming a server machine.
[0059]
In addition, the center 5 is a client machine that transmits the synchronization segment to the mobile phone 3 via the wireless network 2 and receives a confirmation response of the synchronization segment from the apparatus 1 and then logs in as establishing a TCP connection.
[0060]
Similarly, the TCP data from the center 5 is sent to the terminal 4 via the transmission buffer 14 and the data transmission processing unit 16 by removing the TCP header, the IP header, and the ppp frame into one byte units ( d11).
[0061]
On the other hand, when a line is connected to the device from the center, the center is a client and the device is a server, as shown in FIG.
[0062]
Then, the center 5 makes a TCP connection request to the wireless network 2 (d20), a telephone line connection is made from the wireless network to the portable telephone 3 (d21), and a telephone call is made from the portable telephone 3 to the device 1. To connect the line (d22, d23).
[0063]
After establishing the PPP link (d24), the device 1 automatically establishes a TCP connection between the device 1 and the center 5 (d25). That is, the center 5 side becomes a client, and the remote monitoring control device 1 becomes a server.
[0064]
Thereafter, TCP data is transmitted from the center 5 side (d26), and the device 1 sends this data to the terminal for each byte (non-procedure) (d27).
[0065]
On the other hand, as shown in FIG. 7, a failure such as disconnection of the telephone line may occur in data exchange between the pump unit side and the center side.
[0066]
When a TCP connection is established between the device 1 and the center side 5 and, for example, non-procedural data from the terminal 4 is transmitted to the center 5 as TCP data, the device 1 and the wireless network 2 When the telephone line is disconnected and a failure occurs (d30), the center 5 serving as a server monitors the timer (d31), and disconnects the TCP connection after a lapse of a predetermined time (d31).
[0067]
On the other hand, when the telephone line is disconnected, the mobile phone 3 sends a no-carrier signal to the apparatus 1 (d33).
[0068]
Thus, the line connection processing 25 of the apparatus 1 makes a call to the mobile phone 3 as a mobile arc again by the AT command to establish the telephone line and the ppp link with the wireless network 2 and the center 5 (d34, d35, d36). , D37).
[0069]
Then, the device 1 again becomes a client, establishes a TCP connection with the center 5 (d38), and then transmits nonprocedural data from the terminal 4 to the center 5 (d39).
[0070]
As described above, the present apparatus 1 is configured such that the terminal 4 and the center 5 periodically connect the line using the Dopa network, and the non-procedural data from the terminal 4 (the water level sensor attached to the pump unit, Data from various sensors such as a sensor and a pressure sensor), the non-procedural data is converted into data by performing TCP / IP and PPP framing, and can be transmitted to the center 5 through the wireless network 2. .
[0071]
The TCP data from the center 5 is transmitted to the terminal as non-procedure data of one byte.
[0072]
Accordingly, since there is no data transmission and reception through the Dopa network, there is no charge even if the line is connected, so that sequential data communication can be performed while maintaining the line. Also, the communication fee per packet can be reduced. Further, telephone line work on the slave station side is not required.
[0073]
Further, when remote control is performed by connecting to the Internet, it becomes possible to receive services such as WWW and electronic mail on the Internet. Furthermore, since the authentication is performed using the IP address and the telephone number, data security is high.
[0074]
In addition, since data transmission and conversion of nonprocedural data to the TCP / IP protocol are all automated, quick data transmission is possible.
[0075]
Also, data transmission can be controlled from both sides, and flexible data transmission can be performed according to the state of the master station and the slave station.
[0076]
【The invention's effect】
As described above, according to the present invention, a remote monitoring control device is provided between a wireless network that performs charging according to the amount of data and a terminal device that transmits and receives data in a non-procedural manner. Automatically establishes a line with a portable wireless device, a wireless network, and a master station using the AT command and ppp protocol when there is data to be sent from Data is transmitted using the TCP / IP protocol.
[0077]
When data in packet format is sent from the master station, the data is sent to the terminal device as nonprocedural data obtained by dividing the data into 1-byte units.
[0078]
Therefore, simply installing this device between the existing terminal device and the wireless network automatically converts non-procedural data from the terminal to the TCP / IP protocol and transmits the data via the wireless network. The effect that can be obtained is obtained.
[0079]
In addition, since the data in the packet format is converted from the master station into non-procedural data in units of 1 byte, there is an effect that modification of existing terminal devices and telephone line construction are not required.
[0080]
Also, since the remote control monitoring device transmits and receives data from the master station while the line is connected to the master station via a wireless network that performs charging according to the data amount, the remote control monitoring apparatus does not have to worry about the communication fee per packet. Has the effect that data from the master station can be received.
[0081]
Further, the remote control monitoring device disconnects the TCP connection while keeping the line connected to the master station via a wireless network that performs charging according to the amount of data, and automatically establishes the TCP connection again to perform the server function. Therefore, the effect of receiving data from the master station without worrying about the communication fee per packet is obtained.
[0082]
Further, since the present apparatus automatically performs the protocol conversion to the master station via the wireless network and the protocol conversion to the terminal apparatus via the wireless network, the terminal apparatus and the master station are not overloaded. The effect has been obtained.
[0083]
In particular, when this apparatus is connected to a control panel for controlling and monitoring the pump unit, an effect is obtained that the protocol for data transmission / reception can be converted without regard to the charge for the line.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a portable remote monitoring control device according to the present embodiment.
FIG. 2 is a sequence diagram of a terminal device, a remote monitoring control device, a mobile phone, a wireless network, and a center according to the embodiment.
FIG. 3 is a flowchart illustrating an operation of the remote monitoring control device of the present embodiment.
FIG. 4 is an explanatory diagram illustrating packet conversion of data from a terminal device.
FIG. 5 is an explanatory diagram illustrating conversion of data from a center into nonprocedural data.
FIG. 6 is a sequence diagram of a terminal device, a remote monitoring control device, a mobile phone, a wireless network, and a center in response to a request from the center according to the present embodiment.
FIG. 7 is a sequence diagram when a telephone line is disconnected during data transmission / reception according to the present embodiment. FIG. 8 is an explanatory diagram for explaining a problem.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Remote monitoring control apparatus 2 Wireless network 3 Mobile telephone 4 Terminal 5 Center 6 Router 7 LAN
11 reception buffer 12 data division processing unit 15 non-procedure conversion unit 17 client mode processing unit 18 server mode processing unit 19 client / server selection processing unit 20 TCP / IP transmission processing unit

Claims (2)

A wireless network that charges according to the amount of data, a terminal device that transmits and receives data via a serial line without any procedure, and a remote monitoring control device that connects the line using a mobile phone to a network composed of a master station. hand,
Provided between the mobile phone and the terminal device,
Means for monitoring whether there is data to be sent from the terminal device or whether there is a line connection request from the master station,
Means for connecting the line with the mobile phone using an AT command protocol when there is data to be sent, and then connecting the line with the master station via the wireless network using a ppp protocol;
After connecting the line with the master station, a client mode is established in which a synchronization segment is requested to the master station to establish a TCP connection, and data from the terminal device is transmitted in a packet format of the TCP / IP protocol. Means,
Means for receiving data in a packet format of the TCP / IP protocol from the master station after the establishment of the TCP connection, dividing the data into byte units, and sending the byte unit data to the terminal device in a non-procedural manner; ,
When the line is connected to the mobile phone, the wireless network, and the master station from the device side, if there is no data to be sent from the terminal device to the master station for a predetermined time, the TCP connection is disconnected. Means,
Means for setting the apparatus to a server mode in which the apparatus is in a state of waiting for reception of the synchronization segment immediately after the disconnection of the TCP connection, and re-establishing the TCP connection. Remote monitoring and control device connected to the device. The terminal device ,
In a radio network and a terminal device according to claim 1, wherein the receiving the data from the data or the master station from each sensor of the pump unit is a pump monitoring panel for controlling the valves of the pump unit Remote monitoring control device connected.

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