The function of an ultrasonic transducer is to convert the incoming electrical power into mechanical power (i.e., ultrasound) and then transmit it while consuming a tiny fraction of the power itself. The transducer consists of a housing, a matching layer, a piezoelectric ceramic disc transducer, a backing, a lead-in cable, and a Cymbal array receiver. The piezoelectric ceramic disc transducer is made of PZT-5 piezoelectric material polarized in the thickness direction, and the Cymbal array receiver is composed of 8 to 16 Cymbal transducers, two metal rings, and rubber washers. The action distance of the invention is greater than 35m, and the bandwidth reaches 10kHz, which can detect the long-range targets moving at high speed.