Hello,
One thing to remember is that the SRFxx’s have a wide range of “View”.
You will probably have to play around with the gain settings and or angle the SRF10 to get the results you want.
Also have a look at -->> http://www.robot-electronics.co.uk/htm/sonar_faq.htm
and -->> http://robot-electronics.co.uk/
Greetings,
H.J. Windt