Abstract
It is still a big challenge to set up a durable and stable long-term liquid pressure monitoring system at many points for long pipeline under harsh environment. In this paper, according to the need from customers, a practical high-reliable liquid pressure sensor based on dual optical fiber Bragg grating (FBGs) has been studied and developed. The FBG-based liquid sensor structure has been brought forward and optimized, and its sensing principle has also been given in details. Besides, the novel sensor has been tested by serious experiments. The research results show that the FBG-based liquid pressure sensor has good linearity, repetition and immunity of temperature changes, and the theoretical sensitivity agrees well with that from the experimental results. Such kind of FBG-based liquid pressure sensor can be applied in practical applications.
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