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Closed-loop disc type optical fiber accelerometer based on moving coil feedback mechanism

An accelerometer and disk-type technology, applied in the direction of measuring acceleration, velocity/acceleration/shock measurement, velocity/acceleration/electric shock meter details, etc., can solve the problems of small feedback force and uncomfortable feedback force acceleration, and improve linearity , Inhibit the vibration amplitude and improve the stability

Inactive Publication Date: 2020-06-23
HARBIN ENG UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the feedback force generated by electrostatic force feedback is very small, so it is not suitable for accelerometers that require large feedback force

Method used

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  • Closed-loop disc type optical fiber accelerometer based on moving coil feedback mechanism
  • Closed-loop disc type optical fiber accelerometer based on moving coil feedback mechanism
  • Closed-loop disc type optical fiber accelerometer based on moving coil feedback mechanism

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Experimental program
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Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] combine Figure 1 to Figure 5 , the present invention includes an elastic disc 11, a mass block 12, a probe housing 13, a DFB light source 21, a first fiber coupler 22, a fiber ring 23, a second fiber coupler 24, a photodetector 25, a data acquisition card 31, a power amplifier Circuit 32, moving coil feedback mechanism 33 and computer 34, line a1 is set between DFB light source 21 and first fiber coupler 22, lines a2 and a3 are set between fiber ring 23 and first fiber coupler 22, fiber ring 23 and the second fiber coupler 24 are provided with lines b1 and b2.

[0034] 1) The light emitted by the DFB light source 21 is divided into two beams through the first optical fiber coupler 22, and enters the second optical fiber coupler 24 through the two optical fiber rings 23 on both sides of the elastic disk 11 and interferes, and ...

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Abstract

The invention provides a closed-loop disc type optical fiber accelerometer based on a moving coil feedback mechanism. The closed-loop disc type optical fiber accelerometer comprises an elastic disc, amass block, a probe shell, a DFB light source, a first optical fiber coupler, an optical fiber ring, a second optical fiber coupler, a photoelectric detector, a data acquisition card, a power amplification circuit, the moving coil feedback mechanism and a computer. And the moving coil feedback mechanism loaded with a feedback electric signal applies a feedback force to the elastic disc to realizean electromagnetic force feedback loop of the disc type optical fiber accelerometer. For the disc-type optical fiber accelerometer, a working frequency band can be broadened, a dynamic range can be increased, nonlinear distortion can be reduced, and the disc-type optical fiber accelerometer can be widely applied to the fields of earthquake monitoring, underwater acoustic detection and the like.

Description

technical field [0001] The invention relates to a closed-loop disc optical fiber accelerometer based on a moving coil feedback mechanism, which belongs to the field of optical fiber sensing and optical measurement. Background technique [0002] Accelerometers have a long history dating back to the 1940s. Accelerometers have a wide range of applications. They are the core components of guidance systems, hydrophones, and seismometers. Accelerometers directly determine the performance of these instruments. [0003] There are many types of accelerometers, which can be roughly divided into electromechanical, MEMS, optical, and fiber optic types according to their working principles. Compared with electromechanical accelerometers, fiber optic accelerometers have the advantages of high sensitivity, fast response, large dynamic range, resistance to electromagnetic interference, and resistance to harsh environmental influences. [0004] Feedback technology can effectively improve t...

Claims

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Application Information

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IPC IPC(8): G01P15/093G01P1/00
CPCG01P15/093G01P1/003
Inventor 杨军杨木森张毅博安然邹晨李晋苑勇贵姜富强张晓峻
Owner HARBIN ENG UNIV
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