no you cannot know..all the tracking softwares are illegal and pirated..you cannot track the profile visitors.you cannot come to know about people visiting your facebook profile without a tracking software.
This is a trivial question that is asked by many teenagers nowadays.
the issue is privacy.
the answer to your question is that you cannot track people who are like checking out your profile in the facebook unless you have a legal tracking software.
but you can avoid unknown people from checking out your profile on facebook.