Double-core optical fiber integration type accelerometer and measuring method

Abstract

The invention provides a dual-core optical fiber integrated accelerometer and a measuring method thereof. A semiconductor optical laser device 1 is coupled at one end of a single-core optical fiber 6, a dual-core optical fiber 9 is coupled at the other end of the single-core optical fiber 6, a sleeve 8 is nested outside the coupled region 7 of the single-core optical fiber and the dual-core optical fiber, the sleeve 8 is rigidly connected with an exterior shell 2, a metal sleeve which is provided with a hole in the middle is nested at the other side of the dual-core optical fiber 9 as a weight block 3, a receiving device 4 with a plurality of interference fringes and a data processing module 5 are arranged in the exterior shell 2, and the receiving device 4 and the data processing module 5 are rigidly connected with the exterior shell 2, a data line and a power supply line are fetched out through a wire hole 10. The accelerometer has the advantages that the structure is simple and compact, the automatic compensation can be achieved, the accelerometer is suitable for various measuring occasions, and the measuring sensitivity is high.

Description

(1) Technical field [0001] The invention relates to an inertial parameter measuring device, in particular to a novel integrated accelerometer based on a double-core optical fiber structure. The invention also relates to an acceleration measurement method based on a dual-core optical fiber integrated accelerometer. (2) Background technology [0002] Accelerometers are important measurement elements for inertial navigation, inertial guidance, and control testing equipment. Both inertial navigation and inertial guidance use the characteristic of accelerometer sensitivity to measure the motion acceleration of the carrier. At present, accelerometers have been widely used in the guidance and control of aviation, navigation, spaceflight and weapons. [0003] There are many types of accelerometers, including pendulum accelerometers, flexible accelerometers, electromagnetic accelerometers, electrostatic accelerometers, vibrating beam accelerometers, etc. New technologies such as m...

AI Technical Summary

Problems solved by technology

[0006] The prior art of the existing optical fiber acceleration sensor has the disadvantages of high coherence requirements, the two interference arms are easily disturbed by the external environment temperature change, and it is difficult to miniaturize.

In the case of volume limitations and temperature stability requirements for the acceleration measurement system, it is obviously difficult for the interferometric fiber optic acceleration sensor composed of discrete optical structures to meet the requirements

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