JPS61136342A - Optical transmission network - Google Patents

Abstract

PURPOSE:To raise the profitability of equipment by constituting a network for connecting a system and a location by using a coupling device which can output one or plural optical inputs as they are or branching them to an optional number of pieces. CONSTITUTION:An optical transmission network is constituted by coupling systems S1-Sm and locations L1-Ln by coupling devices KD11-KDnm. Each coupling device can output one or plural inputs as they are, and also when its inputs are plural, and when its input is one, that which collects necessary ones among them to one by time-division multiplex, and that which branches its input itself to an optional number of pieces can be outputted, respectively. That is to say, when plural switches in the coupling device are turned on or off as prescribed, each optical signal A1+A2+...An from the locations L1-Ln can all be transmitted as multiplexed signals A1+A2+...An to all the systems S1-Sm. Also, a path to optional locations L1-Ln from each system S1-Sm of the reverse direction can also be constituted in the same way.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an optical transmission network, and more particularly to an optical transmission network having a coupling device that couples multiple systems of a power generation plant and multiple locations in a matrix. Regarding.

[Background of the invention]

In a large-scale power generation plant, there are a large number of various operating devices that adjust each part of the plant and detectors that detect the status of each part of the plant, and these are arranged in a spatially dispersed manner. These operating devices and output devices are connected to the plant's monitoring and control system to monitor and control the plant.

Visual control also has various functions, and each functional unit must be connected to the necessary operating devices and detectors distributed in the device. Therefore, each functional unit of a supervisory control system is called a system, and a system is a system that collects spatially dispersed operating devices and detectors into appropriate small areas and sends and receives signals between them and the supervisory control system. If we establish a system and call it a location, each system and each location
7 Yons must be connected by a transmission line.

Figure 10 shows the relationship between systems and locations when taking a nuclear power plant as an example. ), reactor auxiliary system (NB AUX)
, water supply control system (ffc), condensate water supply system (RFP, CP,
It is divided into the following: human UX), turbine auxiliary system (TG AUX), turbine control system (EHC), etc. On the other hand,
Signal intake and output light are distributed to each building, including the 1st to 5th floors of the reactor building R/B, the 1st to 4th floors of the turbine building T/B, and the control building (C/B). ) locations from the 1st floor to the 3rd floor, etc. are connected by the O mark on the gio diagram, and the 9 systems and locations are combined. These systems and locations must be independent of each other, that is, even if one becomes abnormal, the others must operate to ensure the reliability of the ground. For example, even if the radiation monitoring system becomes abnormal, the neutron instrumentation system will operate normally, or even if the signal from the reactor building/B1 floor cannot be obtained, other signals from the same building will be able to be received normally. It is necessary. A network connecting systems and locations must be configured to satisfy these conditions.

Figure 11 shows an example of a conventional optical network.
This is called a multi-drop method. In the same figure, each system 81 to S4 is located at all locations L.
By having these two configurations, even if any system or location becomes abnormal, the others can operate normally. However, this method has the disadvantage that the number of transmission terminal devices T required for each location is equal to the number of systems (four in FIG. 11), and the equipment becomes bulky. Even if there are systems that are not connected to some locations, this is generally a small number and this trend remains unchanged. FIGS. 12 and 13 are also examples of conventional network configuration methods, which are called star one type and loop type, respectively. It is clear that these also have the same drawbacks as the system of FIG.

[Purpose of the invention]

An object of the present invention is to eliminate the drawbacks of the prior art described above and to provide an optical transmission network that can economically connect systems and locations without impairing their independence. .

[Summary of the invention]

The present invention can output one or more inputs as they are,
And when there are multiple inputs, only one of them is required! ! A system and a location are connected using a coupling device that is configured so that when the input is one, the input itself can be branched into an arbitrary number of outputs by combining them into one by time division multiplexing. It is characterized by configuring a network that

[Embodiments of the invention]

Hereinafter, the present invention will be explained by examples. Figure 1 shows 4? of the present invention. This shows an example of a coupling device KD that connects mold to mold.This coupling device KD has two human-powered L! and two outputs Lo, which are optical signals like SK.
and So. The input Lx is input to the opto-electric converter 3 via the optical switch 1, where it is converted into an electrical signal.

The input Sx is also input to the opto-electric converter 4 via the optical switch 2, where it is converted into an electrical signal. Switches 5 to 8 are provided to select which outputs Lo and So the inputs Lt and St are connected to, for example, switches 5, 6, .
If switch 8 is on and switch 7 is off, Lo = LX
, So =S t +L t.

However, the ten symbol here indicates that Sl and Ll are time-division multiplexed signals, and this multiplexing is performed by multiplexers 9,
10. Since the multiplexers 9 and 10 are the most complex circuits in this coupling device and are most likely to cause a failure, the multiplexers 9 and 10 have a self-diagnosis function, and if there is an abnormality, each output section 11 will
The optical switch 1 or 2 is switched through the control so that Lo=Lt or 5o=St. Therefore, at this time L
In the direction or S direction the coupling device is bypassed and the switch 5
No matter how you select ~8, signals from other directions cannot be combined.

FIG. 2 shows an example of a network configured using the coupling device of FIG. 1, with system 5I-8 and location L+
-L wires are shown coupled by coupling devices KDII to KD,,'. In this network, if switches 5 and 6.8 in the coupling device are turned on and switch 7 is turned off, each signal At to A from location 7 Yon Ll-L,
, are all multiplexed signals A* +Az+...+A
1 and is transmitted to all systems Sl to S. Routes from each of the systems 81 to S1 in the opposite direction to arbitrary locations Lr to L can be constructed in the same manner. According to such a configuration, for example, the 8-way multiplexer 1 of the KDth coupling device
Even if 0 fails, the input St in this direction remains the output S.
Since it is bypassed to system 8. Heke location-7 Yon L
All the song locations can be connected just by not being able to input the signal from 1, and the pond systems S, ~S, are not affected at all. The same applies when an abnormality occurs in any system or location. For example, location L
When L is abnormal, the coupling device KDIL, KDth, etc. sends a signal from that location.

All switches 6 and 8 of KDt- can be turned off to prevent the signal AI from the abnormal location from being input to any system, but the signal from the pond location can be transmitted normally to all systems.

In this sense, system and location independence is ensured. Moreover, only one terminal device is required for signal output from each location Lt to L, regardless of the number of systems! This makes the equipment easier. Note that the switch 5 in each coupling device
Initial settings of ~8 and switching when system location is abnormal are as follows:
It may be controlled manually or may be controlled from a distance by providing a signal line.

Figure K3 shows a second embodiment of the coupling device, which is a feature of the present invention.The embodiment in Figure 1 has 2 manpower and 2 outputs, but it is generalized to L manpower and 2 outputs (t is (optional). That is, each input 1, -It and output 01~OL
There is one set of input/output 1b for each, and optical switch 10 for each OK.
1 to the photoelectric converter 11, 1 to the multiplexer 12, 1 to the output section 13 of the multiplexer abnormality signal, and switches 2kl to 2.
kt is provided. When multiplexer 12k is out of order, optical switch lok is switched and output Ok = input ■
, and this output Ok has another input Ij (j'pk
) cannot be transmitted. On the other hand, the switch 2kl~2kt
Which output 0h (k=
1 to t) can also be multiplexed and output from any of the input crabs 1 to It. In this way, while the case of FIG. 1 is a two-way coupling device, this embodiment can be regarded as an extension of this in the t direction, and if t=2, it will of course be the same as the s1 diagram. If the switches are set appropriately in this multi-directional coupling device 1KDM, there will be an n to 1 type as shown in Figure 4, a 1 to m type as shown in Figure 4B, and a 4C type.
It is clear that n to m as shown in the figure can be easily constructed.

However, for the 40th cause, LOh =L Ih +s It +8 Is+...
...+81. .

k=1-n 5OJ =8 I J +LIt +L It +・”
...+L1. .

j = 1~m That's 6.

For example, FIG. 5 shows an embodiment of an optical network using the coupling 1tii shown in FIG. 14B. In this embodiment, the coupling devices KDM1 to KDMs have m=2 in FIG. 4B, and the coupling devices KDM4 to KDMs have m=3. With the coupling device shown in Figure 1, this example requires 15 pieces, 1611! l coupling device KDM I-KDM
It can be assumed that the systems S and -3s are combined into signals At-As from all locations L1 to L3.
All of these are captured in time-division multiplexed form. The feature of this embodiment is that several of the coupling devices KD shown in FIG. 1 are combined into one multi-directional coupling device KDM, thereby reducing the overall number of optical switches, photoelectric converters, multiplexers, etc. It is. For example, the coupling device dKDM4 in Fig. 5 has four optical switches, but to create an equivalent circuit, three coupling devices IKD in Fig. 1 are required, making a total of six optical switches. Become. Furthermore, the fifth
In the figure, portions corresponding to the switches 211 to 2tt and the like in FIG. 3 and portions corresponding to the output units 131 to 13t are omitted, but it is assumed that these are present. Therefore, even when such a coupling device KDM is used, the above-mentioned independence of system and location is guaranteed, and only one terminal for transmission at each location is required.

FIG. 6 shows another embodiment of the network using the coupling device KDM shown in FIG.
The signals A1 to A3 from ~Ls are input to the coupling device KDM+o -KDMt* in the form of Fig. 4B, from which A1+Ax +As is outputted to the system 5t-ss.
Furthermore, the coupling device KDM.

Each signal person 1 to As from ~K D M 1m is input to the coupling device rILKDMK3 to KDMls in the form of FIG.
This is a configuration in which +A3 is output. However, a determination device tcl-Cs is installed on the input path to each system, so that when one of the duplicated coupling devices becomes abnormal and goes into bypass mode, the signal Ax+Az Junin 3 can be taken from the other. The reliability of the system is improved by selecting and taking in the information using a determination device. In this way, a highly reliable transmission network can be constructed by combining coupling devices, and the effect of improving reliability by these is extremely large.

Figure 7 shows an example in which the present invention is applied to a nuclear power plant, showing each system (RMS etc.) and each location (RTU
) are connected by a coupling device KDS to make them independent. However, in this configuration example, each group of systems and locations that are closely related to each other is connected to the coupling device KDS, and signals are transmitted between the coupling devices between groups with few exchanges. Taking as an example the leftmost coupling device KDS in this embodiment, a more detailed configuration is shown in FIG. In this part, location Ll-L
s has the 1st to 5th floors of the nuclear reactor Confucian house (几/B), and outputs each signal person 1-A5. System S1 is the radiation monitor system (RMS), Sg is the neutron instrumentation system (NM3)
, Ss is the reactor recirculation system (PL 几RFC),! 94 is a nuclear reactor auxiliary system (NBAUX). Four coupling devices KDS of the type shown in FIG. 4A are used, and multiplexed signals Ar
+Ax +AS +A4 +A5+α is all system S
.

~Sent to S5. Here, α means a signal transferred from another coupling device. This coupling device K D S t
~2ζDS4 each has the function shown in Fig. 4A by appropriately setting the switches in the general circuit shown in Fig. 3, but here we will explain a simpler example with the same function. show. FIG. 9 is an example of this, and in this example as well, switches, output parts, etc. are omitted from illustration. However, in the configuration shown in FIG. 3, the multiplexer 121 should be inserted between the photoelectric converters 111-115 and the optical switches 101-105
125 are removed and directly connected in this embodiment. This is because in the case of this example, in the L direction, the input person 1~kg can be taken out as the output A1-person.As a result, the circuit is much simpler than the one in Figure 3. However, the result will not change in any way.

It should be noted that, although all of the above embodiments are directed to optical transmission, it is clear that they can also be applied to cases other than optical transmission.

〔Effect of the invention〕

As is clear from the above description, according to the embodiments of the present invention, it is possible to economically combine systems and locations without impairing their independence, and it is also great for improving the reliability of optical transmission lines. This has the effect of being able to make a contribution.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of a coupling device which is a feature of the present invention, FIG. 2 is a diagram showing an embodiment of an optical network constructed using the coupling device of FIG. 1, and FIGS. 4A to 4C are diagrams showing other embodiments of the coupling device featuring the present invention, and FIGS. 5 and 6 are diagrams showing an optical network configured using the coupling device of FIG. 4A or 4B. 7 is a diagram showing the overall system configuration when the present invention is applied to a nuclear power plant; FIG. 8 is a diagram showing the overall configuration of the coupling device in the application example of FIG. 7; FIG. The figure is a circuit diagram showing an example of a single coupling device, Figure 10 is a diagram showing the relationship between systems and locations in a nuclear power plant, and Figures 11 to 13 are diagrams showing conventional examples of optical networks. . KD, KDM, KDS...coupling device, 81-S. ... system [, Lt-L- ... location, 1.2.
...Optical switch, 3, 4...Photoelectric converter, 5-8...
・Switch, 9.10...Multiplexer, 11.1
2... Abnormal output section, 101-10t... Switch,
111~11t...Photoelectric converter, 121~12t...
・Multiplexer, 211-2tt...Switch, 1
31-13t...Abnormal output section.

Claims (1)

[Claims] Selection means for each of the n output lines to select an arbitrary number of optical input signals from the n input lines, where 1 and n are integers of 2 or more. and a multiplexer that time-division multiplexes the optical input signal selected by the selection means and outputs it to the output line.
An optical transmission characterized in that the input line of the coupling device is connected to a plurality of optical transmitting ends, and the output line of the coupling device is connected to a plurality of optical receiving ends. network. 2. An optical switch is provided to bypass between each input line of the coupling device and the corresponding output line, and when the multiplexer of a certain output line becomes abnormal, the bypass between the output line and the corresponding input line is provided. 2. The optical transmission network according to claim 1, wherein the optical transmission network is configured to be put into a bypass state by switching a corresponding optical switch. 3. The selection means and the multiplexer are removed from a portion of the n output lines of the coupling device, so that only the optical input signal from the corresponding input line is always output to the output line. An optical transmission network according to claim 1 or 2, characterized in that: