X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/dmems12.git/blobdiff_plain/5bd43a57b7e5c885d77aac6dceea8cc19f2cfaea..0d52df2ec65d3122bfbecc24b94647275b7ae89f:/dmems12.tex?ds=sidebyside

diff --git a/dmems12.tex b/dmems12.tex
index 423b0f7..5920a5b 100644
--- a/dmems12.tex
+++ b/dmems12.tex
@@ -71,12 +71,51 @@
 
 \section{Introduction}
 
-%% blabla +
+Cantilevers  are  used  inside  atomic  force  microscope  which  provides  high
+resolution images of  surfaces.  Several technics have been  used to measure the
+displacement  of cantilevers  in litterature.   For example,  it is  possible to
+determine  accurately  the  deflection  with different  mechanisms. 
+In~\cite{CantiPiezzo01},   authors  used   piezoresistor  integrated   into  the
+cantilever.   Nevertheless this  approach  suffers from  the  complexity of  the
+microfabrication  process needed  to  implement the  sensor  in the  cantilever.
+In~\cite{CantiCapacitive03},  authors  have  presented an  cantilever  mechanism
+based on  capacitive sensing. This kind  of technic also  involves to instrument
+the cantiliver which result in a complex fabrication process.
+
+In this  paper our attention is focused  on a method based  on interferometry to
+measure cantilevers' displacements.  In  this method cantilevers are illuminated
+by  an optic  source. The  interferometry produces  fringes on  each cantilevers
+which enables to  compute the cantilever displacement.  In  order to analyze the
+fringes a  high speed camera  is used. Images  need to be processed  quickly and
+then  a estimation  method is  required to  determine the  displacement  of each
+cantilever.  In~\cite{AFMCSEM11},  the authors have  used an algorithm  based on
+spline to estimate the cantilevers' positions.
+%%RAPH : ce qui est génant c'est qu'ils ne parlent pas de spline dans ce papier...
+   The overall  process gives
+accurate results  but all the computation  are performed on  a standard computer
+using labview.  Consequently,  the main drawback of this  implementation is that
+the computer is a bootleneck in the overall process. In this paper we propose to
+use a  method based on least  square and to  implement all the computation  on a
+FGPA.
+
+The remainder  of the paper  is organized as  follows. Section~\ref{sec:measure}
+describes  more precisely  the measurement  process. Our  solution based  on the
+least  square   method  and   the  implementation  on   FPGA  is   presented  in
+Section~\ref{sec:solus}.       Experimentations      are       described      in
+Section~\ref{sec:results}.  Finally  a  conclusion  and  some  perspectives  are
+presented.
+
+
+
 %% quelques ref commentées sur les calculs basés sur l'interférométrie
 
 \section{Measurement principles}
 \label{sec:measure}
 
+In  order to  develop simple,  cost  effective and  user-friendly probe  arrays,
+authors of ~\cite{AFMCSEM11} have developped a system based of interferometry.
+
+
 \subsection{Architecture}
 \label{sec:archi}
 %% description de l'architecture générale de l'acquisition d'images
@@ -328,9 +367,9 @@ Finally, the whole summarizes in an algorithm (called LSQ in the following) in t
 
 \subsubsection{Comparison}
 
-\subsection{VDHL design paradigms}
+\subsection{VHDL design paradigms}
 
-\subsection{VDHL implementation}
+\subsection{VHDL implementation}
 
 \section{Experimental results}
 \label{sec:results}