Fabrication and Structural Design of Micro Pressure Sensors for Tire Pressure Measurement Systems (TPMS)

Sensors

Bian Tian¹  Yulong Zhao²  Zhuangde Jiang²  Ling Zhang²  Nansheng Liao²  Yuanhao Liu² 

[1] id="af1-sensors-09-01382">State Key Laboratory for Mechanical Manufacturing System, Institute of Precision Engineering, Xi’an Jiaotong University, Xi’an 710049, P.R. Chi

关键词: Piezoresistive;    TPMS;    Pressure sensor;    FEM;   

DOI  :  10.3390/s90301382

来源: mdpi

【 摘 要 】

In this paper we describe the design and testing of a micro piezoresistive pressure sensor for a Tire Pressure Measurement System (TPMS) which has the advantages of a minimized structure, high sensitivity, linearity and accuracy. Through analysis of the stress distribution of the diaphragm using the ANSYS software, a model of the structure was established. The fabrication on a single silicon substrate utilizes the technologies of anisotropic chemical etching and packaging through glass anodic bonding. The performance of this type of piezoresistive sensor, including size, sensitivity, and long-term stability, were investigated. The results indicate that the accuracy is 0.5% FS, therefore this design meets the requirements for a TPMS, and not only has a smaller size and simplicity of preparation, but also has high sensitivity and accuracy.

【 授权许可】

CC BY   
© 2009 by the authors; licensee MDPI, Basel, Switzerland