Archives of Acoustics,
7, 3-4, pp. 281-286, 1982
An improved piezoelectric ceramic transducer for ultrasonic applications in air
The design considerations of a new type of piezoelectric ceramic transducer
for transmitting and receiving ultrasonic waves in air have been reported. This transducer contains a bilaminar assembly consisting of a piezoelectric ceramic disc and a metallic plate which oscillates in flexural mode. This bilaminar assembly mounted at its nodal circle can be designed to operate at a fixed frequency in the range of 25 to 50 kHz.
The constructional details and the working of the transducer have also
been given. The resonant frequencies f_exp observed experimentally for transducers having good transmitting and receiving sensitivities are found to be in good agreement with the values f_cal derived from theoretical considerations.
This closed-type transducer is rugged and compact and can be employed with advantage in several indoor as well as outdoor uses in automation, sensing and remote control applications.
for transmitting and receiving ultrasonic waves in air have been reported. This transducer contains a bilaminar assembly consisting of a piezoelectric ceramic disc and a metallic plate which oscillates in flexural mode. This bilaminar assembly mounted at its nodal circle can be designed to operate at a fixed frequency in the range of 25 to 50 kHz.
The constructional details and the working of the transducer have also
been given. The resonant frequencies f_exp observed experimentally for transducers having good transmitting and receiving sensitivities are found to be in good agreement with the values f_cal derived from theoretical considerations.
This closed-type transducer is rugged and compact and can be employed with advantage in several indoor as well as outdoor uses in automation, sensing and remote control applications.
Full Text:
PDF
Copyright © Polish Academy of Sciences & Institute of Fundamental Technological Research (IPPT PAN).
References
F. MASSA, Ultrasonic transducers for use in air, Proc. IEEE, 53, 1363 (1965).
V. N. BINDAL, Indian Patent No. 116564, 1968.
V. N. BINDAL, Ultrasonic transducer for automation, sensing and remote control applications, Research and Industry, 21, 80 (1976).
V. DOMARKAS, A. MASONIS, A. PETRAUSKAS, New type of electroacoustic transducers for gases, Proceedings Ultrasonic International 1977, 180.