Robomart Ultrasonic Transducer Pair

The general transducer design features a piezo ceramic disc bender that is resonant at a nominal frequency of 20 ? 60 KHz and radiates or receives ultrasonic energy. They are distinguished from the piezo ceramic audio transducer in that they produce sound waves above 20 KHz that are inaudible to humans and the ultrasonic energy is radiated or received in a relatively narrow beam. The ?open? type ultrasonic transducer design exposes the piezo bender bonded with a metal conical cone behind a protective screen. The ?enclosed? type transducer design has the piezo bender mounted directly on the underside of the top of the case which is then machined to resonant at the desired frequency. The ?PT and EP? type transducer has more internal damper for minimizing ?ringing?, which usually operates as a transceiver ? oscillating in a short period and then switching to receiving mode.