Linkage monitoring system and monitoring method for monitoring looseness of bolt or nut

Abstract

The invention discloses a linkage monitoring system and monitoring method for monitoring looseness of a bolt or a nut, the linkage monitoring system comprises an optical fiber force sensing device, and the optical fiber force sensing device comprises an optical fiber and two optical fiber connecting parts; two optical fiber connecting parts are fixed on the optical fiber, and the length of the optical fiber between the two optical fiber connecting parts is set to be greater than the linear distance between the two optical fiber connecting parts; a deformation sensing section is arranged on the optical fiber between the two optical fiber connecting parts, the deformation sensing section deforms when the optical fiber connecting parts are subjected to external acting force, and the two optical fiber connecting parts are respectively fixed on the two bolts or nuts. According to the linkage monitoring system for monitoring bolt or nut looseness, real-time and accurate monitoring of the bolt or nut of the wind driven generator is achieved, the bolt or nut looseness or bolt breakage condition of the wind driven generator can be found in time, timely maintenance is facilitated, the scientificity and reliability of routing inspection and maintenance of the wind driven generator are improved, and the maintenance cost is reduced.

Description

[0001] This application claims the priority of Chinese patent application CN201911161692.7 with an application date of November 22, 2019 and Chinese patent application CN201911161693.1 with an application date of November 22, 2019. This application cites the full text of the above Chinese patent application. technical field [0002] The invention relates to a linkage monitoring system and a monitoring method for monitoring the loosening of bolts or nuts. Background technique [0003] At present, the wind power generation industry has been vigorously promoted all over the world. Since most of the installation locations are offshore or remote mountainous areas along the coast, routine maintenance is extremely inconvenient. In addition, there are many bolts for fixing large wind turbines (more than 500 fixing bolts on a large wind turbine). Due to the particularly harsh environment, the fixing bolts or nuts on the wind turbine are very easy to loosen, and the bolts or nuts are ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defect that in the monitoring device of the prior art, one optical fiber is used to connect multiple gratings in series to detect whether the bolt is loose, and there is a disconnection of the optical fiber, which leads to the need for overall replacement, and provides a monitoring device for bolts or nuts. Loose linkage monitoring system and monitoring method

Images