| 摘要 |
PROBLEM TO BE SOLVED: To provide an ultrasonic transmitting/receiving apparatus capable of modulating and transmitting/receiving ultrasonic vibration with sounds via a metal plate, synthetic resin plate, metal rod, synthetic resin rod, metal wall, concrete, tube, medium flowing through the tube or the like by incorporating an ultrasonic vibrator in an acoustic rubber and a propagation material, and capable of performing communication between insides of isolated spaces in a ship or a safe box via the metal plate, metal rod, wall, tube, medium flowing in the tube and the like. SOLUTION: A cylindrical ultrasonic vibrator 2 is attached to a terminal portion of a case 1, an acoustic rubber 3 is attached so as to cover the ultrasonic vibrator 2, a propagation material is inserted between the acoustic rubber 3 and the ultrasonic vibrator 2, and further, an oscillator 5 for applying an oscillation output to the ultrasonic vibrator 2 is mounted inside the case 1. Moreover, a modulator 6 is mounted between the oscillator 5 and the ultrasonic vibrator 2, this modulator 6 is connected to a microphone 7 mounted outside the case 1, further, a demodulator 8 is connected to the ultrasonic vibrator 2, and this demodulator 8 is connected to a speaker 9 mounted outside the case 1. COPYRIGHT: (C)2006,JPO&NCIPI
|
