Ellipsoidal optical fiber pressure sensor and optical fiber fault pressure point detection method

Abstract

The invention discloses an ellipsoidal optical fiber pressure sensor and an optical fiber fault pressure point detection method. The ellipsoidal optical fiber pressure sensor is composed of two semi-ellipsoids, a circular fiber coiling groove with the radius being in a predetermined length is engraved on the adhesive surface of one of the semi-ellipsoids, and sensing optical fibers are coiled in the groove and fixed into the groove through an adhesive. The optical fiber fault pressure point detection method includes the steps that a plurality of ellipsoidal optical fiber pressure sensors are connected onto the same sensing optical fiber in series; when pressure fault detection is conducted on the sensing optical fiber, an optical time domain reflectometer is connected with the sensing optical fiber through a connector, and the ODTR detects and determines a pressure fault point. When some ellipsoidal optical fiber pressure sensor on the optical fiber bears outside pressure to generate obvious bending losses, abnormal pressure points on an optical fiber circuit can be positioned through displaying of the optical time domain reflectometer, fault judgment and positioning can be conducted on project conveniently, and a basis is provided for timely first-aid repair and maintenance.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to an ellipsoidal optical fiber pressure sensor and a method for detecting an optical fiber fault pressure point. Background technique [0002] In recent years, fiber optic sensors have attracted much attention because of their unique advantages such as high sensitivity, small size, anti-electromagnetic interference, and no need for power supply. For real-time detection of pressure in flammable and explosive environments, traditional piezoelectric sensors are not suitable for applications in this environment because they can easily cause combustion and explosion due to electrical signals. Fiber optic pressure sensors are not subject to this limitation because they transmit and sense optical signals. [0003] The pressure sensors used in the fiber optic pressure sensing system include Fabry-Perot type, fiber grating type and so on. Among them, the Fabry-Perot type pre...

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Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide an ellipsoidal optical fiber pressure sensor and a method for detecting a faulty pressure point of an optical fiber to solve the problems of complex structures of existing optical fiber sensors and the high cost of detecting a pressure fault point

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