CN1008498B - Signal transmission system - Google Patents
Signal transmission systemInfo
- Publication number
- CN1008498B CN1008498B CN85102333A CN85102333A CN1008498B CN 1008498 B CN1008498 B CN 1008498B CN 85102333 A CN85102333 A CN 85102333A CN 85102333 A CN85102333 A CN 85102333A CN 1008498 B CN1008498 B CN 1008498B
- Authority
- CN
- China
- Prior art keywords
- station
- transmission
- local
- central station
- local station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
In a signal transmission system for the communication of a central station and a plurality of local stations arranged in iron towers with transmission lines, a closed circuit of a transmission channel is composed of optical fiber cables wrapped in overhead lines suspended on the iron towers between the central station and the local stations. The signal transmission from the central station to the local stations and the signal transmission from the local stations to the central station are realized.
Description
The invention relates to a kind of signal transmission system, especially be connected one such as the such central station in power station and the transmission system of the optical fiber transport channel between a plurality of local transfer station about use, these optical fiber transport channel framves are on the iron tower as electrical power transmission system.
Be suspended in the optical communication system of the aerial cable that comprises optical fiber (hereinafter referred to as OPGW) on a plurality of iron towers of electrical power transmission system a use, all be equipped with a local data transfer equipment in each iron tower, this equipment is collected various data, and sends the data of collecting to central station with OPGW.These OPGW have just constituted be used for the data transmission channel that communicates between local data transfer equipment and central stations.
Fig. 1 is an example of above-mentioned transmission system, wherein, reference number 1 expression electric power pylon, numeral 2 is represented a power station as central station in data communication system.All be equipped with a local data transfer equipment 3 in each iron tower 1, power station 2 is provided with a central data processing unit 4.Local data transfer equipment 3 is connected in series by data channel 7, optical-electrical converter 5, electrical to optical converter 6 with OPGW.The input of each local data transfer equipment 3 has an optical-electrical converter 5, at output one electrical to optical converter 6 is arranged.But there is such shortcoming in the system of Fig. 1, and promptly transfer of data can only be with 4 such direction transmission from local data transfer equipment 3 to the central data processing unit.
Fig. 2 is another example of the data transmission system of application OPGW.This system has overcome the shortcoming of said system, because in this system except there being one to be similar to first such among Fig. 1 transmission channel 7, also be provided with second transmission channel 8 with OPGW, be used for communicating to local transmission equipment 3 from central data processing unit 4, in this system, can carry out both-way communication.But compare with the system of Fig. 1, this system must be provided with the transducer 5 and 6 of double number.
Fig. 3 is another example of the data transmission system of application OPGW.In this system, the communication from farthest local transmission equipment 3 to CPU 4 utilizes article one data transmission channel 7, and second data transmission channel 8 adopts the coupling method that is similar to Fig. 2 system.Fig. 3 system compares with Fig. 2 system, though the number of transducer 5 and 6 can reduce, very long because of article one data transmission channel 7, just increased the loss on article one data transmission channel 7.
Therefore, main purpose of the present invention is the inherent defect that overcomes in the said system, a transmission system of using OPGW is provided, this system can realize the both-way communication between CPU and the local transmission equipment under the situation that does not increase the loss on transducer number and the data transmission channel.
According to the invention provides a signal transmission system, this system is used between at least one central station and a plurality of local station that is arranged in the electric power line steel tower and carries out communication.Described system adopts the fiber optic cables that are included in the overhead wire as its transmission channel, overhead wire hangs on the electric power line steel tower of central station and each local station, described system is characterised in that the transmission channel that has been made of a closed circuit described fiber optic cables, to realize the signal transmission from the central station to the local station and from this locality to the central station.
Fig. 1 is the connection diagram of transmission system example of OPGW of the use of prior art to Fig. 3.
Fig. 4 is the connection diagram according to transmission system one embodiment of the present invention.
Fig. 5 is the block diagram according to another embodiment of transmission system of the present invention.
Fig. 6 is the detailed connection diagram of transmission system shown in Figure 5.
Among Fig. 4, be provided with a central data processing unit 4 in the power station 2, and be provided with a local data transfer equipment 3 in each iron tower 1.The input of each local data transfer equipment 3 connects with optical-electrical converter 5 couplings, and its output connects with electrical to optical converter 6 couplings.With the fiber optic cables among the OPGW with from first transmission channel 7 of local data transfer equipment 3 to central data processing unit 4 transmission signals, with each every local data transfer equipment 3-1,3-3 ... 3-2n-1(is n=1 here, 2,3 ...) series coupled.With the fiber optic cables among the OPGW with from second transmission channel 8 of central data processing unit 4 to local data transfer equipment 3 transmission data, with each every local data transfer equipment 3-2,3-4 ... the 3-2n series coupled.First and second transmission channels 7 and 8 extreme distal end are of coupled connections by the local data transfer equipment 3f of distal-most end, and like this, when central data processing unit 4 was seen, passage 7 and passage 8 had just constituted the closed circuit passage.
In such method of attachment, any one the signal among the first group of this locality transmission equipment 3-2n-1 that connects with the coupling of first transmission channel 7 can be transferred to central data processing unit 4 by first transmission channel 7; Any one signal among the second group of this locality transmission equipment 3-2n that connects with the coupling of second transmission channel 8 can pass through second channel 8, farthest local transmission equipment 3f and article one passage 7, is transferred to the central data processing unit; From the signal of central data processing unit 4, can pass through second transmission channel 8, local transmission equipment 3f farthest and first transmission channel 7, be transferred to each local data transfer equipment 3.
According to above-mentioned signal transmission system, can two-way ground transmission signals or data between CPU 4 and local transmission equipment 3, and each local data transfer equipment only needs two transducers, in addition, owing to use the OPGW channel transmission signal, and have suitable amplification, thereby can prevent the decay of stop signal in transmitting in any direction through each local transmission equipment.
Fig. 5 is another embodiment of signal transmission system of the present invention.In this system, main control station MA and MB among power station A1 and the A2, by in a PCM system between two master stations the fiber optic cables F among the OPGW of transmission signals and data
1And F
2And coupling connects.Between each iron tower M1 each local station in the M4 by a series of fiber optic cables F
3Connect, to transmit data or signal from local station.By such connection, fiber optic cables F
2And F
3Constitute closed circuit, thus the bi-directional data between realization main control station and the local station or the transmission of signal.
Fig. 6 is the detailed connection layout of system shown in Figure 5.Among Fig. 6, be provided with a data transmission unit 10 among the A1 of first power station, this unit 10 comprises the PCM communication apparatus 11 of one 24 channels, the output of this PCM communication apparatus 11 and two fiber optic cables F
1And F
2Coupling connects.F
1And F
2Be F
1To F
4Article four, two in the non-metal type fiber optic cables, these fiber optic cables are distributed in and are suspended in a plurality of iron tower M1 between power station A1 and A2, M2, M3 ... on overhead wire.Transmission line F
1Be just often to use, F
2Be in case of emergency to use.The end of each transmission line is coupled by the PCM communication equipment 21 in the transmission unit 20 of optical-electrical converter 23a, electrical to optical converter 23b and channel selection switch 22 and second power station A2 and connects.Use fiber optic cables F
1And F
2Transmission system be known as first communication system, it adopts the PCM system to carry out communication between power station A1 and A2.
Fiber optic cables F
3Through being arranged on the 30-1 of local station, 30-2 and the 30-3 in each iron tower, fiber optic cables F
3An end be coupled by an optical-electrical converter 32 and data processor 33 in master station MA and connect fiber optic cables F
3The other end be coupled by electrical to optical converter 34 and master station MB and connect.After connecting like this, just constituted through power station A1, fiber optic cables F
1Or F
2, power station A2, again through fiber optic cables F
3A closed circuit with each local station.In this system, each 30-1 of local station is equipped with a transmitter and a receiver among 30-2 and the 30-3, carry out data communication with time division way.Each 30-1 of local station, 30-2 and 30-3 can both pass through fiber optic cables F
3Send the various measurement data of wind speed and direction etc. to the master station MA of power station A1, these data also can be sent to master station MB from master station MA by first communication system.In addition, also can realize transmitting various instructions to 30-1 of each local station and 30-2 by first communication system and the 30-3 of local station from master station MA.According to these instructions, just can handle the equipment in the local station, for example be equipped in the 30-1 of local station respectively, the television camera 35-1 among 30-2 and the 30-3,35-2 and 35-3 carry out work.Can by specifying which platform television camera of starting from the identification code of the other local station in master station MA sending area and in the mode of each local station differentiation identification code.
Fiber optic cables F
4Be used for transmitting TV signal from each television camera 35-1 to 35-4 to master station MA.
In transmission system shown in Figure 5, when any one local station from the 30-1 to 30-3 of local station or from main control station MB during to master station MA transmission data or signal, signal or data are by fiber optic cables F
3Transmission left is input to data processor 33 through optical-electrical converter 32 on figure.
On the other hand, when need startings television camera 35-2, master station MA is by a channel to PCM communication apparatus 21 in first transmission system, sends to have the identification code that is assigned to the 30-2 of local station or this television camera is started in the instruction of identification address.Then, identification code and instruction are by main control station MB, electrical to optical converter 34, fiber optic cables F
3, transfer to each 30-3 to 30-1 of local station.It is not the identification code of oneself that the 30-3 of local station judges this identification code that is transmitted, with regard to inoperative video camera 35-3; And the 30-2 of local station judges the recognition code that this identification code is oneself, so just starts television camera 35-2.
By such connection, use first communication system only to use two fiber optic cables F
2And F
3Just can constitute the closed circuit of communication, carry out the transmitted in both directions of signal, thereby reduce the number of required fiber optic cables.
Claims (2)
1, a kind of being used at least one central station and a plurality of signal transmission system that communicates between the local station of electric power line steel tower that is arranged on, described system has used the fiber optic cables in the overhead wire that is included on the iron tower of suspension between central station and local station, constitute the closed circuit of a transmission channel by described fiber optic cables, to realize from central station to each local station and the transmission of the signal from each local station to central station
It is characterized in that: be used for to first transmission channel of central station transmission signals and first group of local station each every the local station series coupled, be used for from central station to second transmission channel of local station transmission signals and each interval local station coupled in series of second group of local station of the local station composition that is left, first transmission channel and second transmission channel connect by local station coupling farthest, constitute the closed circuit of described transmission channel in such a way.
2, a kind of being used at least one central station and a plurality of signal transmission system that communicates between the local station of electric power line steel tower that is arranged on, described system has used the fiber optic cables in the overhead wire that is included on the iron tower of suspension between central station and local station, constitute the closed circuit of a transmission channel by described fiber optic cables, to realize from central station to each local station and the transmission of the signal from each local station to central station, it is characterized in that, the closed circuit of described transmission channel, be by be used for a PCM system from central station to first transmission channel of another central station transmission signals and second transmission channel that is used for the central station transmission signals addressed to front first by local station from another central station constituted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85102333A CN1008498B (en) | 1985-04-01 | 1985-04-01 | Signal transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85102333A CN1008498B (en) | 1985-04-01 | 1985-04-01 | Signal transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85102333A CN85102333A (en) | 1987-01-31 |
| CN1008498B true CN1008498B (en) | 1990-06-20 |
Family
ID=4792433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85102333A Expired CN1008498B (en) | 1985-04-01 | 1985-04-01 | Signal transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1008498B (en) |
-
1985
- 1985-04-01 CN CN85102333A patent/CN1008498B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85102333A (en) | 1987-01-31 |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |