Optical Fiber Bragg Grating Sensing Device and Its Monitoring System Used to Detect the Forced State of Water-lubricated Bearings

Abstract

The invention discloses an optical fiber grating sensor device and a monitoring system for detecting the force state of a water-lubricated bearing, which solves the problems of low implantation success rate, short service life and high cost of the optical fiber grating sensor. The fiber Bragg grating sensing device of the present invention includes a rubber bush composed of a plurality of rubber bush strips, at least one rubber bush strip is embedded with an optical fiber grating sensing unit along the inner edge, and the fiber grating sensing unit includes an axially embedded The capillary in the rubber bush strip, the optical fiber packaged in the capillary, and the filler filled between the capillary and the optical fiber; multiple gratings are arranged on the optical fiber. The monitoring system of the invention comprises a fiber grating sensing device, a fiber grating demodulator, a host computer, a data comprehensive analysis unit and an alarm and output unit. The invention is easy to manufacture, low in cost, good in reliability, long in service life, high in accuracy, and can monitor the load, temperature and stress of the bearing bush synchronously and continuously.

Description

technical field [0001] The invention relates to a bearing sensor and a monitoring system. Background technique [0002] Water-lubricated bearings are mainly installed at the stern of the ship, soaked in water, and use water as a lubricant to support the rotation of the main shaft of the ship. The rubber bearing pad of the water-lubricated bearing acts as an elastic body, which can effectively suppress the rotational vibration of the rotating shaft and improve the shafting alignment effect. [0003] Using the monitoring system to monitor the stress, temperature, load and other states of rubber bearing pads, and analyze the working characteristics of rubber bearings, it is of great economic significance to enhance the function of water-lubricated bearings, improve service life, guide ship maintenance management, and reduce maintenance costs. . [0004] Since the water-lubricated bearing is immersed in the water environment for a long time, the traditional electrical signal s...

AI Technical Summary

Problems solved by technology

There is also U.S. Patent No. US7512294B2, which discloses the use of secondary molding technology to lay cross-layered optical fibers on a polymer plane substrate to measure the stress-strain characteristics of multi-layer composite materials, but the structure is relatively complex and inconvenient to manufacture, which is not conducive to large-scale production.

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