Pipeline strain real-time detector suitable for high-temperature environment

Abstract

The invention provides a fiber bragg grating type pipeline strain real-time detector. The fiber bragg grating type pipeline strain real-time detector comprises a sensitive membrane plate and high-temperature fiber bragg grating sensors, wherein the high-temperature fiber bragg grating sensors comprise the high-temperature fiber bragg grating axial strain sensor, the high-temperature fiber bragg grating transverse strain sensor and the high-temperature fiber bragg grating temperature sensor. The minimum straight-line distance between the high-temperature fiber bragg grating transverse strain sensor and a line formed by the high-temperature fiber bragg grating axial strain sensor and the high-temperature fiber bragg grating temperature sensor is not less than 10 cm. The strain real-time detector can detect two-dimensional strain situations of a pipeline under a high-temperature environment, and temperature compensation is achieved in a sensing system. The fiber bragg grating type pipeline strain real-time detector has the advantages of being resistant to electromagnetic interference, high in precision, rapid in dynamic response, small in size, low in weight and the like, and further has reliability, stability and simplicity. Meanwhile, a plurality of strain real-time detectors are arranged and used so that multipoint distributed networking detection can be conducted on the high-temperature pipeline.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing equipment components, and in particular relates to an optical fiber grating type real-time strain detector for pipelines suitable for high-temperature environments. Background technique [0002] With the continuous expansion of energy mining scale, high-temperature pipelines have been widely used in petrochemical, aerospace, steel energy, environmental protection, pharmaceuticals and other industries that are closely related to the lifeline of the national economy. Every year there are high-temperature pipeline explosions and leakage accidents, and the prevention of pipe explosions has become the focus of attention. A large number of accident statistics show that the main causes of leakage and explosion of high-temperature pipelines are pipe wall corrosion thinning and high-temperature creep. Moreover, the failure strain of the outer wall of the high-temperature pipeline is a nonlin...

AI Technical Summary

Problems solved by technology

However, there are disadvantages in these two methods: firstly, the above two methods need to be shut down before testing can be performed; secondly, both methods need to manually measure the performance of the pipeline for a long time and record the data, which not only requires a large workload and high cost , the accuracy is not high, and the test period is long; the most important thing is that neither method can test the pipeline in operation

[0006] To sum up, none of the currently used real-time detection methods can satisfy the real-time detection of high-temperature pipelines, and the real-time detection of high-temperature pipeline strain urgently requires the development of more suitable technical devices.

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