X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/dmems12.git/blobdiff_plain/5bd43a57b7e5c885d77aac6dceea8cc19f2cfaea..099b94e08988d44f4f22b13a2da77f029c6ec29a:/dmems12.tex?ds=inline

diff --git a/dmems12.tex b/dmems12.tex
index 423b0f7..6a7f646 100644
--- a/dmems12.tex
+++ b/dmems12.tex
@@ -71,7 +71,35 @@
 
 \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        optic
+interferometer~\cite{CantiOptic89},     pizeoresistor~\cite{CantiPiezzo01}    or
+capacitive  sensing~\cite{CantiCapacitive03}.  In  this paper  our  attention is
+focused   on  a  method   based  on   interferometry  to   measure  cantilevers'
+displacements.   In  this  method   cantilevers  are  illiminated  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} {\bf verifier ref}, the authors have used an algorithm based
+on spline  to estimate  the cantilevers' positions.   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}
@@ -328,9 +356,9 @@ 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}