My application needed to measure human height on a standing kiosk. I need to attach the sensor on kiosk ceiling type top. I used different kind of ultrasonic sensor for this purpose but nothing proving reliable results.
First, general ultrasonic sensor have deadband within which the sensor doesn't work and second human head and should varies and thus the reflecting pattern. Can anyone suggest the best method and sensor to use for this purpose? I didn't use laser till now because of eye safety reasons.