JPS6053357A - Data transmission equipment - Google Patents

Abstract

PURPOSE:To attain ease of installation of a terminal device by connecting a radio transmitter-receiver to a station of data way and allowing to a radio terminal at a remote location to receive and transmit data. CONSTITUTION:A central processing unit 2 and an input/output device 3 are installed to a central control room 1. The result of processing of the data is fed to the data way 10 via a station 9. Transmission information is modulated by the transmission section of the radio transmitter-receiver 12 connected to other station 9 and transmitted from an antenna 13. The transmission information is received by the radio terminal 14 and applied to an output device 7.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to data transmission equipment for high-speed data transmission between various parts of a plant and a central processing unit.

[Technical background of the invention and its problems]

The operation monitoring and control operations of power plants are becoming increasingly centralized, with a single room called the central control room monitoring the status of plant equipment such as pumps and valves, and monitoring plant information such as temperatures, pressures, and flow rates at various parts of the plant. By knowing the values of parameters and parameters, there is a tendency to grasp the state of the entire plant, make judgments, start and stop plant equipment, and remotely execute control commands to control devices. Furthermore, during the daily operation of the power plant, we not only record the amount of power generated, but also collect main parameters such as the flow rate and temperature of the feed water, the pressure of the main steam, the vacuum level of the condenser, and the period of the power plant. It is an important part of the job to keep records. Such centralization of monitoring, operation, and recording means that plants become larger, and the more the locations where data is generated or the destinations of data (handled and handled) are spread out spatially, the more difficult it becomes to monitor, operate, and record safety. This is becoming increasingly necessary and important from the perspective of labor saving. In other words, the wider the range of data exchange, the more it becomes necessary to centralize the data. Also, in order to reduce the number of field operators and improve safety on the other hand,
The data exchanged between various parts of the plant and the central government is becoming increasingly detailed and diverse. This trend is due to the advancement and development of information processing devices such as electronic computers! As a result, there is an increasing trend in which there is an increasing demand for delivering the necessary information when and where it is needed.However, in order to satisfy these demands, In addition to the processing capacity of the central information processing equipment, how do we transmit data such as plant parameters generated at various points scattered across a large site to the central processing equipment? How to transmit information to various locations becomes important as the scale expands.In a transmission method that connects each location of the plant directly to the center using individual cables, the number of cables increases as the number of nodes expands. 118 costs are incurred between the cost of the coupler itself, the cost of laying it, and the space and management of the cables near the central control room. Even when multiplexing data transmission, it is necessary to install cables to the multiplexing location, so in order to transfer information between a certain location in the plant and the center, cables must be installed each time. This restriction also makes it virtually impossible, if not impossible, to transmit data from locations far away from the multiplexing equipment. accompanied by.

1 and 2 show examples of such prior art.
It is So1. FIG. 1 is an example of the Inno-transmission method, in which various parts of the plant and the central processing unit are directly connected by cables. The medium heat processing equipment 2 installed in the central control room 1 allows operators and technicians to input or output data in the central control room 1 via a central input/output device 3 such as a CRT or quiwriter. . On the other hand, the central processing unit 2 is connected to various parts of the plant 5 by individual cables 6 in order to input plant parameters through pressure sensors and contacts through a process input/output device 4, and output control signals. ing. In addition, data input/output devices 7 such as CRTs, quiwriters, ITVs, etc., which are used by people to input/output data to/from the central processing unit 2 at locations other than the central control room 1, are also individually connected via cables 6. has been done. Depending on the type of data input or output device 7 and the distance 11i[m at the central processing unit 21, an amplifier 8 may be used to enhance the transmitted signal.

In such a data transmission device, when a request to add plant input data arises, the process input/output device R4 at the appropriate location in the plant 5 and the central open side 1
It will not break unless a new long cable 6 is installed between the two. In addition, when a data input or output device 7 such as a CRT is temporarily installed at a location in the power plant outside the central control room 1 for plant investigation or accident handling, this device 7 and the central processing unit 2 are also used. A new long cable 6 will be required between the two.

On the other hand, FIG. 2 is an example of the prior art in which data transmission between various parts of the plant and the central processing unit A is multiplexed. A central processing unit ift, 2 in the medium heat control room 1 is connected to a high speed dataway 10 by a station 9. This high-speed dataway 10 has another station 9.
Terminal 11 is connected via. The terminal 11 is comprised of the aforementioned process input/output device 4, data input/output device 7, etc. For example, data regarding the water supply flow rate of the plant 5 is obtained from the terminal 11 installed relatively close to the sensor. Process input/output on I/
1.4 and is transmitted via station 9 through high-speed data way 10 to central processing unit 2 connected to station 9 in central control room 1 . Medium heat treatment device 2
Now, we will convert this water supply flow rate input data into data for display, or calculate its rate of change over time, and use the central input/output to provide control conditions and data to Iruma. The data displayed on the device 3 is passed through the high-speed data way 10 again and displayed on the data output device 7 of the terminal 11, or transmitted to another terminal 11'. Even in such an example, if you use the data input or output device 7 or input new plant parameters for the plant 5 at a location far from the existing station 9, the cable 6 should be pulled longer. It is necessary to rotate the station or add a new station 9 separately.

Furthermore, if the high-speed data way 10 does not pass near the additional location, it will be necessary to take a detour around it.

From the above, in order to transfer the necessary information to any location in the plant when necessary, large-scale plant construction is required each time.L Minor investigations and quick response in the event of an accident Therefore, it is generally very difficult to add or expand terminals. The object of the present invention is to provide a data transmission facility that improves adaptability to movement and allows a wide variety of information to be exchanged at any location within a plant when necessary.

[Summary of the invention]

The present invention provides a wireless transmitter/receiver at a stage connected to a high-speed dataway and a terminal, so that even if there is no high-speed dataway or station near the terminal, it is possible to connect to the location where the data is generated and without running long cables. This allows data to be exchanged between a central processing unit and a location where data is needed.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an example in which the present invention is applied to a power generation plant will be described based on embodiments shown in the drawings.

At power plants, data is collected from various locations within the power plant, processed by information processing equipment, and converted into a format that allows operators and other personnel to accurately grasp the plant status.
- Process the data and provide the data, for example as a bar graph, on a color CRT or the like.

In FIG. 3, there is a central processing unit 2 in the central control room 1 for performing such information processing, and a central processing unit 2 that requests the central processing unit 2 to display data and perform calculations.
A central input/output device 3 such as a color CRT or typewriter is installed for displaying data resulting from processing. Further, the processing results of such data are transferred to the high-speed data way 10 via the station 9 and transmitted periodically or when data is required. Transmission information is sent to other stages,
The signal is modulated by the transmitter of the radio transceiver 12 connected to the antenna 9, and transmitted from the antenna 13 on a carrier wave. The transmitted information is received by the antenna 13' of the wireless terminal 14, demodulated by the receiving section of the wireless transceiver 12', and converted into the original voltage signal to be sent to a color CRT or type remote from the high-speed data way 10. The data displayed on the data input or output device 7 of the writer is transmitted to the plant 5 via the process input/output device 4. On the other hand, plant 5
Requests and commands from the output device 7, such as plant data, parameter data, and data output device 7, are transmitted to the central processing unit 6.2 through the above-mentioned reverse route. Further, when the terminal 11 is located near the station 90, the terminal 11 is directly connected to the station 9 and data is exchanged as in the conventional case.

Next, the operation of the data transmission equipment configured as described above will be explained.

In the central control room 1 of the power plant, there are meters that indicate the status of the power plant 5, such as temperatures and flow rates at various locations.
Information such as pressure, water level, open/close status of contacts, and switch decisions are collected. This information is displayed by lamps and indicators, and is also processed by the central processing unit 2.

The data is not only used as the instantaneous value of the blunt meter, but in some cases, the cumulative value or rate of change of value is calculated, and the input key is used to perform complex calculations such as heat consumption rate. This is carried out in the central processing unit 2. The calculation results, input values, and results of the logical operation η- obtained in this way are further processed and displayed on the central input/output bag Ht 3 such as a color CRT in the control room 1, and are displayed on the central input/output bag Ht 3 such as a color CRT in the control room 1. Information will be provided to. Since the central input/output device 3 can perform input operations to the central processing unit 2 using a keyboard, etc., it is possible to change the display screen and display necessary data. In this way, the central control room 1 can obtain information covering the entire plant, which is very convenient in terms of monitoring, managing, operating, and controlling the plant. Therefore, even in locations other than central control room 1, central control room 1
Similarly, there will be a demand for something that cannot be used to centralize and process information. In order to achieve this, it is necessary to connect a data input or output device 7, such as a color CRT or typewriter, with performance similar to that of the central input/output device 3 to the central processing unit 2, and display the same information. good. The display of information such as ``Now'' is displayed in a place far away from the existing station 9 and high-speed data way 1o, for example.
Consider a case where it is temporarily needed for a newly constructed administrative building, etc. Since the need is temporary, it is not practical to lay a long cable to the existing station 9 or to add a new station by bypassing the high-speed data line 10.1 In such a case,
By using the wireless terminal 14 shown in FIG. 3, the aforementioned objectives can be achieved.

The wireless terminal 14 installed in the new building is equipped with the same type of data input or output device as the central input/output device 3.

7 is connected, through which information can be exchanged. 3. The information processed by the central processing unit 2 is multiplexed by the station 9 that connects the high-speed data way 10 and the central processing unit 2, and the high-speed data If the way 10 is an optical communication cable, the signal is further subjected to voltage-)C conversion and then transferred to the high-speed data way 10. The station 9 closest to the wireless terminal 14 captures this information, performs optical-to-electrical conversion, returns the multiplexed signal, and sends the signal to the subsequent wireless transceiver 12.

Here, the signal is transmitted as a radio wave from the antenna 13 to the antenna 13' of the wireless terminal 4, so even if the building where the wireless terminal 14 is installed is far away from the high-speed data way 10, , also station 9
Even if you are far away from JT, you can lay a new cable,
There is no need to detour the dataway.

Such a need makes it possible to connect the data input or output device 7 to the central processing unit 2 without laying cables even if the station 9 and the building, i.e. the wireless terminal 14, are located close to each other. .

The signal received by the wireless terminal 14 and adjusted to O1 by the wireless transmitter/receiver 12' is transmitted in the same manner as the conventional station 9, and is sent to the central input of the central control water 1 by the data input or output device 7 such as a color CRT or a typewriter. Exactly the same information as on the output device 3 is displayed.

Furthermore, even when the transmitted information is information for plant control and is transmitted to the plant 5 through the process input/output device 4 of the wireless terminal 14, the data transmission procedure is the same as that described above. Furthermore, even when data from the plant 5, for example, the temperature of the feed water, is transmitted to the central processing unit 2 via the wireless terminal 14 in the opposite direction, the idea is exactly the same, although the data transmission direction is reversed.

Next, the wireless transceiver 12 will be explained with reference to FIG.

The information signal transmitted through the high-speed dataway 1-O undergoes optical-to-electrical conversion at the station 9, and is returned to the multiplexed signal or original signal, and then sent to the wireless transceiver 12.
can be conveyed to. In the wireless transceiver 12, the input signal is transmitted through the signal separation section 15 to the sender signal conversion section 16, where it is converted into a signal suitable for modulation, such as code conversion and error correction during transmission. After detecting the error, it is converted into a code with error detection or correction. The signal converted in this way is input to the modulation section 18 together with the carrier wave generated by the carrier wave generation section 17, and after being modulated and subjected to high frequency amplification etc. with the n1 transmission signal 1% 19, it passes through the radio wave separation section 20. It is radiated from the antenna 13 into space'.

On the other hand, the signal from the wireless terminal 14 received by the antenna 13 is separated from the transmitted signal by the radio wave separation section 20, and is subjected to necessary processing such as high frequency amplification and waveform shaping in the receiving S/W/W processing section 21. Thereafter, a signal wave is extracted from the carrier wave in the demodulator 22. The receiving signal converter 23 performs error correction on the signal, performs code conversion or signal conversion to the signal form to be transmitted to the station 9 of the data way, and then separates the signal. Part 15
The signal is then transmitted to station 9 via .

As explained above using FIGS. 3 and 4, this embodiment performs signal transmission by radio waves by mainly performing signal modulation/demodulation, signal code conversion, signal error detection, signal level conversion, etc. The data input and output device 7 can be connected to the central processing unit 2 in the central control room 1 without installing cables.
It becomes possible to connect to.

In the above embodiment, station 9 and terminal 14
Although an example has been shown in which the connection is made between the . As for the modulation method shown in FIG. 4, various modulation methods such as amplitude modulation, two-frequency modulation, and nine-phase modulation can be employed.

Further, in the above embodiment, an example was shown in which the central input/output device 3 is directly connected to the central processing unit 2, but as shown in the fifth section, the central input/output device 3 is connected via the station 9 of the high-speed data way 10. It may also be connected to the central processing unit M2.

Also, the transmitted signal of the station 9 with the wireless transceiver 12 does not need to be stored in the wireless terminal 14, and as shown in FIG. There is no problem with C, therefore, it is also possible to transmit data between the two central processing units 2 and 2'', and to transfer the processing results of the central processing unit 2 to the central input/output unit 3'' of another system.
or vice versa.

Furthermore, the number of stations 9 having wireless transceivers 12 is not limited to one, as shown in FIG. Radio waves of different frequencies 24
, 24' may be used for data transmission.

Furthermore, as shown in FIG. 8, for one station 9 having a wireless transceiver 12, multiple wireless terminals 14
It is also possible to perform data transmission between 1:n using the same frequency.

〔Effect of the invention〕

As explained above, according to the present invention, a wireless transmitter/receiver is connected to one of the stations of a high-speed dataway, and the processing results of the central processing unit are transmitted by radio waves to a wireless terminal in a physically hot place. Since reception, data transmission, and display can be performed at a location far from the dataway or station, there is no need to install cables, detour around the dataway, or add stations.
It becomes possible to easily provide a terminal and connect data input devices, data output devices, and process input/output devices to the central processing unit. This makes it possible to install the necessary terminals at any location in the plant, when necessary, for temporary investigation of the plant or when setting up a temporary information center outside the central control room in the event of a plant abnormality. It becomes like this. Therefore, it becomes easier to carry out the survey activities of each scale, and the survey activities are fine-grained.
When a plant abnormality occurs or plant condition analysis becomes necessary, an information center can be easily set up in a convenient location, making it easier to maintain and monitor the plant. In addition, you can obtain information to deal with plant abnormalities as soon as possible, and in some cases, you can grasp the situation and take recovery measures before the plant is shut down. The effect of improving safety can be obtained.

[Brief explanation of the drawing]

Figures 1 and 2 are block diagrams of conventional data transmission equipment, Figure 3 is a block diagram of data transmission equipment according to an embodiment of the present invention, and Figure 4 is a block diagram of the wireless transceiver shown in Figure 3. 5 to 8 are block diagrams of data transmission equipment showing other embodiments of the present invention, respectively. 0 1... Central control room, 2... Central processing unit, 3...
Central input/output device, 4... Process input/output device, 5...
・Plant, 7...Data input or output device, 9.
...Station, lO...High speed data way, 11
...Terminal, 12...Wireless transceiver, 13...
・Antenna, 14 ・Wireless terminal. (7317) Agent Patent Attorney Noriyuki Chika (and 1 others)
Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] A high-speed data way that transmits data at high speed, a central processing unit installed in a central monitoring management control room, and processing contents of this central processing unit in the central monitoring management control room.
A central input/output device for output or input, a first station for connecting the central processing unit to the high-speed data way, and a data input device, data output device or plant information for transmitting data to the central processing unit. A data transmission facility comprising a terminal equipped with any one or any combination of process input/output devices for inputting and outputting, and a second station for connecting this terminal to the high speed data way,
A data transmission facility characterized in that the terminal and the station are provided with a wireless transmitter/receiver, the terminal and the station are connected without a cable, and data is exchanged between the terminal and a central processing unit.