Method and system for resisting phase fading of natural gas pipe leakage optical fiber detecting system
A natural gas pipeline and optical fiber detection technology, which is applied in pipeline systems, gas/liquid distribution and storage, mechanical equipment, etc., can solve problems such as poor anti-interference ability, achieve accurate positioning, and improve sensing sensitivity
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[0056] Embodiment: the composition of this example is as figure 1 with figure 2 As shown, it includes a light source, an optical system and a circuit part; a fiber optic sensor is installed on the pipeline body every 1.5km, and a total of 10 sensors are installed. The first 5 sensors and the last 5 sensors form a sensor group respectively, and each fiber optic sensor The group shares a launch fiber to connect with the light source, and each fiber sensor group uses a return fiber to connect to the photodetector; the output of the photodetector is connected to a signal acquisition and processing module including leakage signal identification and event location functions, and the signal The acquisition and processing module includes a signal conditioning unit, a signal acquisition unit, a processing unit, a terminal display and an external interface; the signal output by the photoelectric detector is sequentially connected to a signal conditioning unit, a signal acquisition uni...
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