Hello to all (please excuse my English, I’lm French…)

I’m just starting with LaTeX and I’m trying to create the structure of my future documents (physics & chemistry lessons).

I’m going for article class (one lesson at a time, so no chapters) and I want to create a box with text INCLUDED ON the upper line of the box.

I’ve found this code to format the title of chapters :

titleformat
    {chapter}                          
        [frame]
        {normalsize}
        {filrightlargequadbegin{cursive}Chapitre O&S 02-1end{cursive}quad}
        {18pt}
        {hugebfseriesfilcenter}`

(Chapter is named “Signaux et capteurs”)

I get exactly the graphical result I would like (title inside a box and the box as the reference number on it), but since it is a chapter and I dont want chapters in my document (problems with the table of contents), I’d like to find a code to have the same result, but for plain text (I don’t know if I’m really clear…)

enter image description here

On the image, up is what I want (I get it with titleformat), down is what I have with :

begin{framebox}  {Signaux et capteurs}filcenter
end{frame}
{normalsize}
        {filrightlargeenspacebegin{cursive}Chapitre O&S 02-1end{cursive}enspace}
        {hugebfseriesfilcenter}`