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Application of the FFT Algorithm Associated With CZT in the Demodulation of Fabry-Perot Pressure Sensors(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2008年01期
Page:
88-92
Research Field:
Publishing date:

Info

Title:
Application of the FFT Algorithm Associated With CZT in the Demodulation of Fabry-Perot Pressure Sensors
Author(s):
Dai Xiajuan; Wang Ming
Jiangsu Key Lab of Opto-electronic Technology,Nanjing Normal University,Nanjing 210097,China
Keywords:
Fabry-Perot pressure sensors;  CZT;  MEMS
PACS:
TP212
DOI:
-
Abstract:
In th is paper, the FFT demodu lation m ethod o f Fabry-Pe rot pressure sensors theoreticly is ana lysed, and CZT ( ch irp z- translation) is introduced here on the basis of FFT to im prove the trad itiona l FFT algor ithm. In the s imu lation byM atlab, the re lative error of this new me thod is just 0. 1%, and in the experim ent of the demodu lation o f theM EMS Fabry-Pe ro t pressure sensor, w hosem etrica l range is from 0 to 3MPa, its reso lution reaches 0. 05M Pa and its linea rity achieves 0.993 16, where we use 256 do ts’ FFT and 100 dots’ CZT. The experim ent show tha t this new m ethod o f comb in ing FFT w ith CZT can reach a h ighe r prec is ion, m eets the practica l dem ands, and m ay be app lied in the dem odulation of mu ltip lexed senso rs fo r its h igher reso lution and less ca lculationa l quantum.

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Last Update: 2013-04-24