Principle Research on a Single Mass Piezoelectric Six-Degrees-of-Freedom Accelerometer

Sensors

Jun Liu¹  Min Li¹  Lan Qin¹ 

[1] Key Laboratory of Optoelectronics Technology and Systems Ministry of Education, Chongqing University, Chongqing 400044, China; E-Mails:

关键词: six-DOF accelerometer;    piezoelectric sensor;    finite element;   

DOI  :  10.3390/s130810844

来源: mdpi

【 摘 要 】

A signal mass piezoelectric six-degrees-of-freedom (six-DOF) accelerometer is put forward in response to the need for health monitoring of the dynamic vibration characteristics of high grade digitally controlled machine tools. The operating principle of the piezoelectric six-degrees-of-freedom accelerometer is analyzed, and its structure model is constructed. The numerical simulation model (finite element model) of the six axis accelerometer is established. Piezoelectric quartz is chosen for the acceleration sensing element and conversion element, and its static sensitivity, static coupling interference and dynamic natural frequency, dynamic cross coupling are analyzed by ANSYS software. Research results show that the piezoelectric six-DOF accelerometer has advantages of simple and rational structure, correct sensing principle and mathematic model, good linearity, high rigidity, and theoretical natural frequency is more than 25 kHz, no nonlinear cross coupling and no complex decoupling work.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.