The ultrasonic ranging system developed has a range of more than 32 meters, a beamwidth of less than 100, and a bandwidth of about 4 kHz (22-25. 5 kHz). If a combined ultrasonic transducer structure is used, the bandwidth can be extended to 8 kHz. A large-range ultrasonic ranging system composed of

In order to improve the anti-interference ability and measurement accuracy of the ultrasonic ranging system, an appropriately selected PN can be used.The code replaces the single pulse signal as the encoded information. The noise signal is uncorrelated with the encoded information can be filtered by

Piezoelectric disc type of transducers discuss the advantages and disadvantages of various forms of ultrasonic transducer. Considering the performance, mounting dimensions and field testing of ultrasonic ranging sensors, piezoelectric ceramic discs are selected radial/ thickness of the vibration mod

Ultrasonic distance sensor can be widely used in related fields such as level, liquid level, monitoring, robot anti-collision, various ultrasonic proximity switches and anti-theft alarms. It is reliable in the operation, easy to install, waterproof, with small angle of launch, high sensitivity and c