CN-0343 range extension

Is it possible to extend the distance range on CN-0343 to 40 meters?.  If so what would be involved in tweaking the design to meet this distance?

    •  Analog Employees 
    on Mar 2, 2017 8:24 AM over 3 years ago

    hi roadrunner: the CN0343 used ultrasonic time of fly method to do the distance measurement, if you want to extend the distance range of CN0343 there have some point need to be considered,

    1. the sound power need to increase to make the echo loud enough to detect by receiver, this is need to use a larger transmitter, for a rough calculate, the emit power need to proportional to the square of distance, for 40m range measurement the excitation power need to approximate 16 times of 10m range
    2. there need a large open space for 40 meters range, because the obstacles will cause the unnecessary echo detected by the receiver.
    3. the temperature difference for those 40 meters travel path need to keep as small as possible, because the acoustic velocity related to the temperature.

    because the sound is hard to beam like laser, so the ultrasonic is no advantage in long distance (over than 10m) measurement.