Packaging device for applying constant pre-stress on fiber grating sensor

Abstract

The invention discloses a packaging device for applying a constant pre-stress on a fiber grating sensor. The device comprises a base, an adjustable workbench, a fiber clamping mechanism, a pre-stress adjustment device and a stationary mounting plate. The adjustable workbench, the pre-stress adjustment device and the stationary mounting plate are arranged on the base. The pre-stress adjustment device is arranged on one side of the base, and the stationary mounting plate is arranged on the other side of the base. The adjustable workbench is arranged between the pre-stress adjustment device and the stationary mounting plate. An optical fiber is placed on the adjustable workbench. One end of the optical fiber passes through the fiber clamping mechanism to be positioned on the pre-stress adjustment device, and the other end of the optical fiber passes through the fiber clamping mechanism to be positioned on the stationary mounting plate. The device is simple in structure, small in size, low in cost, convenient in operation, and stable and reliable in running. The pre-stress of the device is continuously adjustable. By means of the device, a constant pre-stress is applied onto the optical fiber, so that the measurement accuracy, the measurement repeatability and the measurement consistency of the fiber grating sensor are improved.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, in particular to a packaging device for applying constant prestress to an optical fiber grating sensor. Background technique [0002] The central wavelength of the fiber Bragg grating can be directly modulated by factors such as strain and temperature, and has a good linear response, so it is an ideal strain and temperature measurement element. Fiber Bragg Grating has many advantages such as anti-electromagnetic interference, high sensitivity, small size, light weight, corrosion resistance, wide measurement range, easy integration, simple structure, and easy reuse, and can form an intelligent distributed sensor network. In recent years, the measurement technology based on fiber Bragg grating has developed rapidly and has been gradually applied to engineering fields such as large-scale civil engineering structures, energy and chemical engineering, manufacturing, and aerospace. [00...

AI Technical Summary

Problems solved by technology

The screw clamping mechanism of the device is inconvenient to operate, and the device has no prestress display device, so it is difficult to determine the size of the applied prestress. When packaging the fiber grating sensors in batches, the prestress applied to each sensor cannot be consistent, reducing the cost of the optical fiber. Consistency of Grating Sensor Measurements

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