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Double-core optical fiber integration type accelerometer and measuring method

A dual-core optical fiber and accelerometer technology, applied in the direction of acceleration measurement using inertial force, can solve the problems of temperature change interference of two interfering arms, high coherence requirements, and difficulty in meeting requirements, and achieve real-time, simplified and compact systems. , to achieve the effect of full digital output

Inactive Publication Date: 2009-02-18
HARBIN ENG UNIV
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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

Method used

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  • Double-core optical fiber integration type accelerometer and measuring method
  • Double-core optical fiber integration type accelerometer and measuring method
  • Double-core optical fiber integration type accelerometer and measuring method

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Embodiment Construction

[0030] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0031] combine Figure 5 and figure 2 , the structural composition of the dual-core optical fiber integrated accelerometer includes a semiconductor laser 1, a housing 2, a mass block 3, a receiving device 4, a data processing module 5, a single-core optical fiber 6, a single-core-dual-core optical fiber coupling area 7, and a sleeve 8, dual-core optical fiber 9, lead hole 10. The semiconductor laser 1 is coupled to one side of the single-core optical fiber 6 through a coupler, and the dual-core optical fiber 9 is coupled to the other side of the single-core optical fiber 6. A sleeve 8 is placed outside the coupling region 7 of the single-core-dual-core optical fiber. The tube 8 is rigidly connected to the outer casing 2, and the metal sleeve with a hole in the middle is set on the other side of the dual-core optical fiber 9 as the mass block 3. The receiving dev...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P15/03
Inventor 苑立波耿涛杨军
Owner HARBIN ENG UNIV
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