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Synchronization method of optical fiber distribution device for power cable

An optical fiber distribution, power cable technology, applied in electrical components, multiplexing communication, time division multiplexing systems, etc. Delay error, improve the effect of synchronization accuracy

Active Publication Date: 2015-04-29
STATE GRID CORP OF CHINA +1
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] However, in the process of optical fiber communication transmission, due to the large difference in the distance between the acquisition units, ranging from a few kilometers to tens of kilometers, and when the synchronization accuracy is high, the error caused by the time delay of each acquisition unit cannot be ignored.

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  • Synchronization method of optical fiber distribution device for power cable
  • Synchronization method of optical fiber distribution device for power cable

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Embodiment Construction

[0030] Such as figure 1 As shown, the example of the present invention provides a method for optical fiber distributed synchronous acquisition. The distributed device includes a host computer, a control unit and a plurality of signal acquisition units connected to the control unit, wherein the signal acquisition unit is connected to the sensor.

[0031] Such as figure 2 As shown, the synchronization flowchart of the distributed device of the present invention, the distributed device in this embodiment includes three collection units: a first collection unit, a second collection unit and a third collection unit.

[0032] A method for synchronizing an optical fiber distribution device for power cables, the steps comprising:

[0033] Step S10: The host computer sends a start collection command to the control unit;

[0034] Step S20: After the control unit receives the start collection command sent by the host computer, it records the current time, sends a trigger signal to eac...

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Abstract

The invention discloses a synchronization method of an optical fiber distribution device for a power cable. The method comprises the steps that an upper computer transmits an acquisition start command to a control unit; the control unit records the current time after receiving the acquisition start command transmitted by the upper computer, transmits triggering signals to acquisition units, and receives signals returned by the acquisition units; the acquisition units trigger via the triggering signals to acquire signals detected by sensors, and transmit the acquired signals to the control unit; the acquisition units acquire for the preset time or the preset data length, stop acquisition, store acquired data or transmit the acquired data to the upper computer via an optical fiber; and the upper computer receives the data returned by the control unit and the acquisition units, computes time delay between the control unit and each acquisition unit respectively, performs time correction on the data acquired by the acquisition units, deletes the data before the synchronization time, and reserves, displays and stores the synchronization acquisition data of the acquisition units.

Description

technical field [0001] The invention relates to a method for synchronizing optical fiber distribution devices for power cables. technical background [0002] Synchronous measurement of distributed devices is an urgent problem to be solved in the application of smart grids, substations and other fields. The synchronization methods of distributed acquisition devices mainly include command synchronization and hard contact synchronization. The command synchronization method is that the main control unit and the distributed acquisition unit pass GPS obtains satellite time, or GPS signal receiver realizes signal synchronization; hard contact synchronization adopts optical fiber communication transmission, which has the characteristics of large optical fiber communication capacity, low loss, low bit error rate and strong anti-electromagnetic interference. [0003] However, in the process of optical fiber communication transmission, due to the large difference in the distance betwee...

Claims

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Application Information

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IPC IPC(8): H04J3/06
Inventor 沈庆河刘嵘杨波辜超段玉兵刘辉
Owner STATE GRID CORP OF CHINA
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