Calibration method and device of optical fiber strain sensing system

Abstract

The invention provides a calibration method of an optical fiber strain sensing system. A weight platform is suspended on a stainless steel frame through a sensing optical fiber, and the height of a vibration table is adjusted; an electronic detector is placed on the vibration table; the vibration amplitude and the frequency of the vibration table are set; the first displacement of the vibration table is obtained according to the vibration amplitude and the frequency, and meanwhile the speed of the vibration table is measured through the electronic detector; the speed of the vibration table isconverted into second displacement of the vibration table; and the fitting smoothness of the vibration table is calculated, and therefore the calibration of the optical fiber strain sensing system iscompleted. The invention further provides a calibration device of the optical fiber strain sensing system. According to the calibration method and the device, the sensing optical fiber and the electronic detector simultaneously measure the motion process of the vibration table, and the motion information measured by the sensing optical fiber and the electronic detector are fitted, and the deformation of the sensing optical fiber can be matched with the vibration amplitude of the vibration table, so that the accuracy of the optical fiber strain sensing system is improved, and the rationality and feasibility of the calibration method are ensured.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and in particular relates to a calibration method and device for an optical fiber strain sensing system. Background technique [0002] As the optical fiber strain sensing technology becomes more and more mature, and begins to replace the electronic detector in some applications, but whether the strain measured by the optical fiber sensing system is consistent with the actual strain, the vibration frequency range and vibration amplitude range that can be accurately measured How much, these questions need to be determined through strict calibration to determine the answer. At present, there is no effective calibration scheme, which can not only make the strain of the optical fiber accurately reflect the movement of the shaking table, but also make the electronic detector correspond to the physical quantity measured by the optical fiber strain sensing system. Contents of the inventio...

AI Technical Summary

Problems solved by technology

At present, there is no effective calibration scheme, which can not only make the strain of the optical fiber accurately reflect the movement of the shaking table, but also make the electronic detector correspond to the physical quantity measured by the optical fiber strain sensing system.

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