Stress monitoring device and manufacturing method

Abstract

The invention provides a stress monitoring device. The stress monitoring device comprises a fiber bragg grating, an optical fiber and a strain body. A protective shell covering the sidewall is fixedly arranged on the sidewall of the strain body. A fiber outlet hole is formed in the protective shell. A protective baffle is arranged around the fiber outlet hole. In a layout space between the protective shell and the sidewall of the strain body, the first end of the optical fiber is fixed to the sidewall of the strain body, and the optical fiber is wound and fixed to the sidewall of the strain body according to a certain winding distance in the axial direction of the strain body. The fiber bragg grating is arranged on the optical fiber in the axial direction of the optical fiber. The second end of the optical fiber extends out of the protective shell through the fiber outlet hole and is connected with a wideband incident light source. A fiber bragg grating demodulation instrument is connected with the second end of the optical fiber through an optical coupler. The stress monitoring device can overcome the defects that an existing stress monitoring device is prone to electromagnetic interference, large in temperature excursion and poor in environmental adaptability. The invention further provides a manufacturing method.

Description

technical field [0001] The invention relates to a measuring device and method, in particular to a monitoring device and method for tethering stress. Background technique [0002] Most of the current floating platforms use mooring cables to connect to the anchoring vehicles on the ground to complete the mooring. The cables and optical cables included in the mooring cables are respectively responsible for providing power protection from the ground to the floating platform, and providing uplink and downlink transmission of control signals. When the floating platform is working in the air, once the tethering force of the tethered cables drops, the floating platform will break free from the shackles of the cables, resulting in serious accidents such as out-of-control damage to the sphere and casualties. Therefore, real-time online monitoring of its mooring stress is necessary to ensure the safety of the floating platform. [0003] Today, piezoelectric stress sensors are used be...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to improve a stress monitoring device and solve the technical problem that the fiber grating cannot be used for effective real-time monitoring of stress changes

[0007] Another object of the present invention is to provide a manufacturing method to solve the technical problem that the tethered stress monitoring device for the tethered cables of the floating platform is easily affected by environmental factors and cannot be accurately measured

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