JPS63201573A - Transmission terminal equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a transmission system installed along an overhead or underground power transmission line to collect various types of maintenance information, and in particular to a transmission terminal device for use as a branch. Regarding.

[Prior Art] FIG. 3 shows this kind of maintenance information collection system, in which terminal devices 10 (10a*10b- I
0C-10d) is provided, and 0PG is provided between each terminal device 10.
They are connected in series by an optical transmission line such as W, and one end of this optical transmission line is connected to the central processing unit 100.

As a data transmission method for each terminal device 10, cyclic communication performed at a constant frequency is adopted, and the terminal device 10a
As a result, data Sa, which is power transmission line information collected at regular intervals, is transmitted from the terminal device 10a to the terminal device 10b. The terminal device 10b relays the data Sa from the terminal device 10a and sends it to the subsequent terminal device 10c, but at this time, the data sb collected in the same way by the terminal device 10b is sent after the data Sa. Send.

The data collected by each terminal device 10 in this way is
The signal is transmitted as a single signal to the central processing unit 100, where it is analyzed and processed.

[Problem to be solved by the invention l However, the above terminal devices 10a, 10b, 10c
.

The above-mentioned transmission method is applicable in the case where there is no branch like 10d, but as shown by the broken line in FIG.
If there are branch routes such as e and 10f, two systems of data will flow into the terminal device 10c, which is the merging point, and in order to handle this with the conventional terminal device 10, the terminal device 10c, which is the merging point, has to Since the optical transmission path after the device 10c requires transmission capacity for two lines, there is a problem in that the cost of the transmission system is high.

[Means for solving the problem] The transmission terminal device of this invention is used in a transmission system that sends and receives data in a prescribed format at regular intervals to a plurality of terminal devices connected to the system. It is characterized by comprising a storage means for storing the sent data by system, and a data transmission means for sequentially transmitting the data for each system stored in the storage means as a series of data at a predetermined timing. shall be.

[Operation] According to the above configuration, data sent for each system is stored in the storage means for each system. Then, when all the data has been stored and a predetermined timing has come, the data transmission means transmits the system-specific data stored in the storage means as a series of data in a predetermined order.

[Embodiment] FIG. 1 shows a transmission system to which a transmission terminal device of the present invention is applied. 10a to 10d are terminal devices provided on the main optical transmission line L (L, , L2), respectively, and the transmission terminal device 20 according to the present invention is provided on the optical transmission path between the terminal device 10b and the terminal device 10c. The transmission line terminal device 20 is connected to a branched optical transmission line L' to which other terminal devices 10e and 10f are connected.

FIG. 2 shows a control block diagram showing one embodiment of the transmission line terminal device 20. As shown in FIG. 21 is a CPU (central processing unit) that centrally controls this device, and 22 converts the optical signals sent from the main optical transmission line L1 and the branch optical transmission line L into predetermined electrical signals. It is an input port that inputs to the CPU 21, and 23 is a RAM (random access memory) that stores data from the CPU 21, and a main line memory g23a that stores data from the main optical transmission line, and a branch memory g23a. A branching storage section 23a is provided for storing data from the optical transmission line L'. 24 is the CPU
This is an output port for converting the read data of the RAM 23 outputted from 21 into an optical signal and sending it to the main optical transmission line L2.

Next, the control operation of the transmission terminal device 20 will be explained using FIG. 1.

The data (Sa+sb) sent by the terminal devices 10a and 10b via the transmission line of the main optical transmission line is
The data is input to the transmission terminal device 20 and stored in the main line storage section 23m of the RAM 23. On the other hand, the data (Se+S f) sent from the terminal devices 10e and 10f via the branching optical transmission line L' is stored in the branching storage section 23b of the RAM 23.
is memorized. When data has been stored in both storage units 23a and 23b, the CPU 21 reads out the data (Se+SF) from the branch storage unit 23b and transfers it to the transmission line L2 of the main optical transmission line via the output port 24. Following the above-mentioned data transmission, the data (Sa+Sb) in the main line storage section 23a is read out and transmitted to the transmission path L2. As a result, a series of data (Se+SF+Sa+Sb) is input to the terminal device 10c. When the terminal device 10c receives the data, it sends the data to the subsequent terminal device 10d, and at the end of the data, it successively sends the data Sc collected by the terminal device 10c. Through such control, data including data from the branch optical transmission line L in the first half and data from the main optical transmission line in the second half is input to the central processing unit 100, where the data is input to the central processing unit 100. Various data on the L' and main optical transmission paths are processed separately.

[Effects of the Invention] According to the present invention, data is stored in the storage means for each system, and then the stored data is sequentially transmitted for each system, so that multiple systems can be transmitted using conventional terminal devices and transmission lines. Be able to handle data.

[Brief explanation of the drawing]

#1 is a system diagram showing an example of a data transmission system to which the transmission terminal device of the present invention is applied, FIG. 2 is a control block diagram showing one embodiment of the transmission terminal device of the present invention, and FIG. 3 is a conventional system diagram 1 is a schematic diagram of the data transmission system of FIG. 10... terminal device, 20... transmission terminal device, 21.
...COU, 22...Input boat, 23...RAM
, 24... Output boat, 100... Central processing unit,
L: Main optical transmission line, L゛: Branch optical transmission line. Patent Applicant Sumitomo Electric Industries Co., Ltd. Agent Patent Attorney Aohaku Aogai 18 Tomi 2 Zuka 3 Zu

Claims (1)

[Claims] (1) In a transmission system that transmits and receives data having a prescribed format at regular intervals to a plurality of terminal devices connected to a system, a storage means for storing data sent from a plurality of different systems for each system, and a predetermined and data transmitting means for sequentially transmitting the system-specific data stored in the storage means as a series of data at the timing of .