Experimental device system of LPG and FBG cascade structure vibration sensor
A technology of structural vibration and experimental equipment, applied in the field of sensors, can solve problems such as limited application range, inability to accurately control the quality of vibration sensors, and vibration sensors that are not suitable for mass production
Pending Publication Date: 2022-05-13
SHENZHEN TECH UNIV
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Problems solved by technology
[0003] However, there is currently no vibration testing device paired with LPG and FBG cascaded structural vibration sensors, which makes it impossible for people to accurately control the quality of the vibration sensor, making LPG and FBG cascaded structural vibration sensors unsuitable for mass production , the scope of application is limited
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[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0022] It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0023] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indic...
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The invention relates to the technical field of sensors, and provides an experimental device system of an LPG and FBG cascade structure vibration sensor, which comprises a vibration platform used for fixing a fixed end of the LPG and FBG cascade structure vibration sensor; the signal generator is connected with the vibration platform and is used for inputting a vibration signal to the vibration platform; the broadband light source is used for outputting a light source; the coupler is connected between the LPG and FBG cascade structure vibration sensor and the broadband light source and is used for receiving optical signals of the LPG and FBG cascade structure vibration sensor; the photoelectric detector is connected with the coupler and converts the optical signal on the coupler into an electric signal; the first amplifier is connected with the photoelectric detector; and the oscilloscope is connected with the first amplifier. Compared with the prior art, the method has the advantages that the LPG and FBG cascade structure vibration sensor is subjected to pairing test, accurate measurement of the LPG and FBG cascade structure vibration sensor is realized, and the method can be applied to industrial production in factories.
Description
technical field [0001] The invention relates to the technical field of sensors, in particular to an experimental device system of an LPG and FBG cascaded structure vibration sensor. Background technique [0002] Optical fiber sensor is a sensor that converts the state of the measured object into a measurable optical signal. It is more and more popular in many fields such as automation and intelligence because of its excellent performance such as sensitivity, precision, strong adaptability, and compactness. In particular, grating sensors based on LPG (Long Period Fiber Grating), FBG (Fiber Bragg Grating) and their combinations have various modal coupling characteristics and have attracted worldwide attention. LPG is sensitive to bending strain, and FBG is sensitive to axial strain. Now there have been LPG and FBG cascaded structure vibration sensors that combine the advantages of LPG and FBG, which have a large linear range, high sensitivity, The advantage of wide measuremen...
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IPC IPC(8): G01H9/00
CPCG01H9/004
Inventor 汪超王方军陈志超
Owner SHENZHEN TECH UNIV