Hi all, Im using an ultrasonic transducer(refer link) and reciever to form a parking sensor..
I am trying to calculate the range and intensity of my signal. i am confused with the calculation of the recieving sensitvity would it be 1v/1u bar or would it be 0.2 mV /1u bar??
please exlplain
according to my calculations the SPL @ 30 cm is 35.6u bar
then the output at a distance of 30 cm the reciever will be 35.6 u bar x 0.2mV/u bar = 7.1 mV is this correct??
if to calculate the output at a distance of 60 cm( travels 30 cm and back) : 7.1 mV / 4 ( output changes as a function of distance^2) = 1.78mV
if so how will i calculate the output at 2 m??
i have a gain of 441 and a comparator detector window of 150mv, what will be the maximum distance that i can detect?? how will i calculate this?? this is so that i can adjust my gain to be able to extend the distance to 2m..
i have spent several hours over this... might just be thick.. please help!
Nick