Low-creep optical fiber disk for optical fiber accelerometer and manufacturing method thereof
An accelerometer, fiber optic disk technology, applied in the direction of using inertial force for acceleration measurement, velocity/acceleration/shock measurement, velocity/acceleration/shock meter details, etc. Drift and other problems, to ensure the uniformity and measurement stability.
Inactive Publication Date: 2014-05-07
ZHEJIANG UNIV
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Problems solved by technology
The fiber optic phase accelerometer has great potential in terms of accuracy, but it senses based on the stress effect of the deformation of the flexible disc on the optical fiber. Usually, the flexible disc made of metal or other elastic materials has considerable creep, causing the stress to continuously slow down. Variety
This small stress change will have a continuous impact on the phase of the light wave, resulting in long-term drift of the measurement results, signal instability and even failure to measure the required data
In addition, the creep of the fiber cladding and the uneven amount of glue lead to long-term stress release and change with the environment, which also makes the acceleration measurement unstable and unreliable
Method used
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[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments
[0032] like figure 1 , figure 2 , as shown, micro-bosses 10 are photoetched on both sides of the crystal disk 1, and a spiral groove is formed between the micro-bosses, and a single-layer bare optical fiber is fixed with a colloid 20 insoluble in organic solvents, such as ultraviolet curing glue, in the groove. 2. The position of the micro boss determines the position of the bare fiber 2 . Symmetrically arranged first fiber disks 16 and second fiber disks 17 are respectively formed on both sides of the crystal disk 1 . like Figure 7 As shown, the single-layer bare optical fibers 2 are respectively fixed with colloid in the spiral grooves, and the left end is at the outer diameter of the optical fiber disk, and there is no micro boss 10, so that the bare optical fibers 2 can be freely drawn out.
[0033] Let the diameter of the bare fiber be micro...
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The invention discloses a low-creep optical fiber disk for an optical fiber accelerometer and a manufacturing method thereof. Miniature lug bosses are formed on two surfaces of a crystal disk in a photoetching way to form a helical recess; a single layer of bare fibers is fixed in the recess; and symmetrically arranged first and second optical fiber disks are respectively formed on the two surfaces of the crystal disk. The manufacturing method comprises the steps of: utilizing the crystal disk as a support of flexible optical fiber disk, processing miniature lug bosses on the crystal disk in a micro-processing method to locate the optical fiber, controlling the glue dosage and guaranteeing uniformity by a spinning method, and preparing the low-creep optical fiber disk by bare fibers with removed coating layers. The low-creep optical fiber disk prepared by the invention generates no long time stress release and changes with the environment, so that the measurement of the acceleration is stable and reliable.
Description
technical field [0001] The invention relates to an optical fiber disk for an optical fiber accelerometer, in particular to a low-creep optical fiber disk for an optical fiber accelerometer and a manufacturing method thereof. technical background [0002] Accelerometer is an inertial sensor device that measures acceleration, and has a wide range of important applications in many fields. The phase-modulated fiber optic accelerometer using the elastic disc structure is not only simple in structure and easy to manufacture, but also has the advantages of high precision, low cross-response, and high bandwidth. [0003] With the development of measurement and inertial technology, the requirements for the accuracy of accelerometers and other indicators are getting higher and higher. Fiber-optic phase accelerometers have great potential in accuracy, but they sense based on the stress effect of the flexible disk on the fiber. Usually, the flexible disk made of metal or other elastic ...
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IPC IPC(8): G01P1/00G01P15/03G02B7/00
Inventor 王冬云王明超舒晓武刘承
Owner ZHEJIANG UNIV