Simulating on a New Elastic Element of FBG Accelerometer

Shao, Jun; Jia, Zhen An; Liu, Jun Hua

doi:10.4028/www.scientific.net/AMR.655-657.689

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HomeAdvanced Materials ResearchEngineering Solutions for Manufacturing ProcessesSimulating on a New Elastic Element of FBG...

Simulating on a New Elastic Element of FBG Accelerometer

Abstract:

A new elastic element of fiber Bragg grating(FBG) accelerometer which is four peripheral clamped trapezoidal beams is developed. The simulation of this elastic element with ANSYS is carried out. From the results, it shows that as an elastic element, four beams have the advantages of lower cross-axis sensitivity which is smaller than 52 dB and nearly uniform strain along the grating area. In addition, its work frequency is higher than the single beam constituting four beams. This kind of elastic element not only can be used with fiber Bragg grating accelerometer, but also other types of sensors.

Info:

Periodical:

Advanced Materials Research (Volumes 655-657)

Main Theme:

Engineering Solutions for Manufacturing Processes

Edited by:

Zhengyi Jiang, Xianghua Liu, Sihai Jiao and Jingtao Han

Pages:

689-692

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.655-657.689

Citation:

J. Shao et al., "Simulating on a New Elastic Element of FBG Accelerometer", Advanced Materials Research, Vols. 655-657, pp. 689-692, 2013

Online since:

January 2013

Authors:

Jun Shao *, Zhen An Jia, Jun Hua Liu

Keywords:

Accelerometer, Fiber Grating, Four Trapezoidal Beams, Simulation

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$41.00

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References

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Paper TitlePages

Design of a Resonant Accelerometer

Authors: Jing Li, Shang Chun Fan, Zhan She Guo

Abstract: A resonant accelerometer was designed in order to overcome low output precision characteristics of the sensors which were tested with analog signals. This accelerator has the advantages of good repeatability, high resolution and excellent stability. Relationship between linear acceleration and resonant frequency of the sensing unit was deduced and the finite element method was used to simulate the correctness of the design. The theoretical and simulation results are 2984.47 and 2971.27 respectively without acceleration applied on this sensor. When 1g acceleration applied on this sensor, the theoretical and simulation results are 2970.18 and 2951.78 . The relative errors are 0.44% and 0.62% respectively. Finally, the fabricated sensor was tested, and the measured resonant frequency is 3022.55 with a relative error 1.26%, and we give out the possible reasons for this error. The results indicate that this design is feasible.

Frequency Measurement and Analysis on Liquid-Filled Pipe Based on Fiber Bragg Grating Sensor

Authors: Jun Tao Chen, Zu De Zhou, Jun Huang, Fen Chen, Chun Sheng Song, Qin Wei

Abstract: Considering the characteristics of light-weight and small-size liquid-filled pipes, the method of utilizing the fiber Bragg grating (FBG) sensor to explore the natural frequency of the pipe has been proposed. Meanwhile the natural frequencies of the tested pipe were obtained through the theoretical calculation and simulation analysis. The calculation results show that the mathematical model and computing method are reliable to calculate the natural frequencies of the tested pipe. The experiments show that the measurement results of the FBG sensor are closer to theoretical calculation results. Because of added mass of the sensor, the natural frequencies of the tested pipe are lowered by the accelerometer. However, the measurement results of the FBG sensor can better reflect the actual characteristics with a negligible mass. The FBG sensor can be applied to frequency measurement, especially to those structures affected by added mass of the sensor.

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