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A Small Range Six-Axis Accelerometer Designed with High Sensitivity DCB Elastic Element.

Zhibo Sun1,2, Jinhao Liu3, Chunzhan Yu4

  • 1School of Technology, Beijing Forestry University, Beijing 100083, China. szbandlzl@bjfu.edu.cn.

Sensors (Basel, Switzerland)
|September 23, 2016
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Summary
This summary is machine-generated.

This study introduces a highly sensitive six-axis accelerometer using a Double Cantilever Beam (DCB) elastic element for improved accuracy. Experimental results validate the sensor

Keywords:
double cantilever beamparallel mechanismsensitivity analysissix-axis accelerometer

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Area of Science:

  • Mechanical Engineering
  • Sensor Technology
  • Materials Science

Background:

  • Sensor accuracy is critical and often limited by sensitivity characteristics.
  • Traditional accelerometers face challenges in achieving high sensitivity and reliability.
  • Parallel mechanisms offer enhanced reliability for sensor development.

Purpose of the Study:

  • To develop a high-sensitivity six-axis accelerometer with a measurement range of ±g.
  • To improve sensor accuracy by applying a Double Cantilever Beam (DCB) elastic element.
  • To validate the theoretical model through dynamic analysis and experimental testing.

Main Methods:

  • Dynamic modeling using Lagrange equations to establish mass and stiffness matrices.
  • Free vibration analysis and parameter design based on a simplified accelerometer model.
  • Stiffness and strain analysis of the DCB structure.
  • Finite element analysis (FEA) using ANSYS Workbench for comparison.
  • Experimental validation of the theoretical model and measurement accuracy.

Main Results:

  • The DCB elastic element significantly enhances sensor sensitivity.
  • FEA simulations showed high coincidence rates for maximum deflection (87.5%-89.0%) compared to theoretical calculations.
  • Experimental accuracy of the theoretical analysis reached up to 90.4% along the x-axis.
  • Measurement errors for linear accelerations were low (0.6%-2.6%).

Conclusions:

  • The developed six-axis accelerometer with a DCB elastic element demonstrates excellent sensitivity and precision.
  • The theoretical model and analysis methods provide a reliable basis for sensor design.
  • The sensor is suitable for applications requiring accurate acceleration measurements.