JPS61290826A - Linking method between loop type light transmission lines - Google Patents

Abstract

PURPOSE:To improve reliability and the speed of transmission by directly connecting optically between lower order loops connecting between controllers. CONSTITUTION:Each lower order loop 11-14 is linked directly by adjoining vicinal one among them through joints 5-7, and when the transmission between lower order loops became necessary, signals are transmitted and received between controllers through the joints 5-7 to improve the information transmission speed and the reliability. Each controller 101-106 is connected to each loop 11-13 through stations 201-206, and system controllers 21-23 are connected to the loops 11-13 through stations 211-213. Further, there are transmission lines 51, 52, 61, 62 in each joints 5, 6 between each loop 11-13, and further, translucent films 81-88 are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a linkage method between loop-type optical transmission lines.

[Background of the invention]

As shown in Figure 2, in order to send and receive signals by optical transmission between controllers for controlling equipment that are distributed in a distributed manner,
Among the controllers 101-108, adjacent controllers are coupled to each lower loop 11-14, respectively. Lower loop 11
14 are connected to the upper loop 30 and unit controller 40 via the system controllers 21 to 24. For example, in order to exchange signals between the controllers 102 and 106, the lower loop 11, the system controller 21,
Upper loop 30. System controller 23゜lower loop 1
Via 3. If the lower loop is linked via the system controller and the upper loop in this way, the transmission time will be longer due to connection control between multiple loops, and in the event of an error in the system controller, transmission between the lower controllers will be impossible, resulting in complete failure. It will not become an autonomous decentralized system.

In order to eliminate this drawback, there is a configuration in which each system controller 25 to 28 can process two lower loops each, as shown in FIG. Even if the system is improved, the disadvantage of slow transmission speed remains, and there is also the problem that the system controller is duplicated, making it expensive.

[Purpose of the invention]

An object of the present invention is to provide a linkage method between loop-type optical transmission lines that autonomously transmit signals across loops at high speed and with high reliability in loop-type optical transmission lines that transmit signals of each system. be.

[Summary of the invention]

The present invention provides a direct linkage path between lower loops made of a semi-transparent film that reflects or transmits incident light depending on its wavelength, and appropriately selects the optical wavelength of the transmitted signal, thereby eliminating the need for a system controller. The present invention is characterized in that required lower loops are connected via the direct linkage path.

[Embodiments of the invention]

An embodiment of the present invention will be described below. FIG. 1 shows an embodiment of the present invention, in which each lower loop ~11~14 is
Direct linkage is provided between adjacent controllers via coupling sections 5 to 7, and when transmission between lower loops is required, signals are exchanged between controllers via coupling sections 5 to 7. The aim is to improve information transmission speed and reliability.

FIG. 4 shows the lower loops 11-18 in more detail. Each controller 101-106 is connected to each loop 11-13 via a station 201-206, and the system controllers 21-23 are connected to a station 2
It is connected to loops 11-13 via lines 11-213. Although the loop 114 is omitted, it is similar. Furthermore, details of the connecting portions 5.6 of each of the loops 11 to 13 are shown in FIG. In the figure, each coupling part 5.6 has a transmission line 51, 52, 61, 62, and a semi-transparent membrane 81.
-88 (followed by the alphabets A-E, the meaning of which will be explained later) are provided. It is now assumed that five optical signals with wavelengths A to E are used for transmission between controllers, and the wavelengths are in the order of A<B<C<D<E.

Alphabets A to E after semi-transparent membranes 81 to 88
means that optical signals with shorter wavelengths are transmitted through the wavelength or number represented by the alphabet, but signals with longer wavelengths are reflected.For example, the semi-transparent film 82A transmits only optical signals with wavelength A. However, the semi-transparent film 81E transmits all of the wavelengths A to E, although the wavelengths B to H are reflected. If such a semi-transparent membrane is made into a connector type as shown in FIG. 6, the connecting portion can be constructed compactly.

On the other hand, the structure of stations 201 to 206 is shown in FIG. 7 using station 201 as an example. An optical signal propagating through transmission line 11 is transmitted to one of wavelengths A to E via spectrometer 95 and demultiplexer 91. The input device 93
It is received by one of the light receivers 931 to 935 in the controller 101 and taken into the controller 101. Further, the output device 94 includes light emitters 941 to 945 that generate light of wavelengths A to E, and as will be described later, the controller 101 selects the generator corresponding to the loop to which the transmission destination is connected and causes it to emit light. The output is sent to the transmission line 11 via the multiplexer 92.

In this embodiment, when it is desired to send a signal from the controller 102 of the younger brother 1 to the controller 106.

The station 201 outputs it as an optical signal of wavelength C. Then, this optical signal is transmitted to the semi-transparent films 82A and 8 in FIG.
It is reflected one after another at 4A, 86B, and 88A and goes to lower loop 1.
3 is transmitted to station 206 connected to station 3. In this way, if wavelength C is used, loops 11 and 13 are connected; similarly, if wavelength B is used, loops 11 and 12 are connected; if wavelength is different, loops 12 and 13 are connected; and if wavelength E is used, loops 11 and 13 are connected.
and 13 are autonomous, as shown directly at the bottom of Figure 5.
Since this connection does not require the intervention of a conventional system controller or upper level loop, high-speed and highly reliable signal exchange is possible. Note that when a signal of wavelength A is selected, all the semi-transparent films in FIG. is used for sending and receiving within the same loop.

〔Effect of the invention〕

As is clear from the above description, the present invention has the effect of improving reliability and transmission speed by directly optically coupling lower loops connecting controllers.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, FIGS. 2 and 3 are diagrams showing a conventional linkage method, FIG. 4 is a diagram showing details of a lower loop, and FIG. 5 is a configuration diagram of a coupling part. , FIG. 6 is a diagram showing a method of installing a semi-permeable membrane. FIG. 7 is a diagram showing an example of the configuration of the station. 5-7...Connection part, 11-14...Lower loop. 101-108...controller, 81-88...
Semi-transparent membrane, 91... Demultiplexer, 92... Multiplexer, 93
1-935...Receiver, 941-945...Emitter.

Claims (1)

[Claims] A plurality of loop-shaped optical transmission lines are sequentially connected by coupling parts, and reflected optical signals are connected by using a semi-transparent film that reflects or transmits optical signals depending on the wavelength of the optical signals. Each of the above-mentioned coupling parts has the function of transmitting the optical signal transmitted to the adjacent loop-type transmission line as it is through the same loop-type optical transmission line, and by selecting the wavelength of the optical signal to be transmitted, the optical signal can be transmitted as it is. Alternatively, a linkage method between loop-type optical transmission lines, characterized in that signals can be exchanged between any two controllers connected to the two loop-type transmission lines.