抽象的

Range Detection based on Ultrasonic Principle

Rajan P Thomas, Jithin K K, Hareesh K S, Habeeburahman C A,Jithin Abraham

The proposed system „The Ultrasonic Range Detectorâ�?�? employs an ultrasonic module that consists of an ultrasonic transmitter and receiver along with anATmega16a microcontroller. It works by transmitting a short pulse of sound at a frequency inaudible to the ear (ultrasonic sound or ultrasound). Afterwards the microcontroller listens for an echo. The time elapsed during transmission to echo reception gives information on the distance to the object. We aimed at designing rangefinder free from the conventional problems arising from the undesirable direct waves, wherein a signal level for detecting a right signal due to the reflection waves from a ranging object is automatically varied and the detection of the right signal is made inaccurate by the time-dependent signal level.