Proximity sensor utilizing polymer piezoelectric film

Details Proximity sensor utilizing polymer piezoelectric film Proximity sensor utilizing polymer piezoelectric film

1993-09-14

1996-05-07

Eldred, J. Woodrow

Communications, electrical: acoustic wave systems and devices

Signal transducers

367157, 367908, 367909, 310322, 310324, 310800, 340435, H04R 1700

Patent

active

055153410

ABSTRACT:
A transducer assembly for a proximity sensor which comprises an elongated polymer piezoelectric film (16). The film is supported as an elongated series of arcuate segments which are curved in the same direction and have the same radius of curvature. Electrodes (18) on both sides of the piezoelectric film form opposed pairs, each pair being associated with a respective arcuate segment. The electrodes are utilized for applying a varying electric field across the thickness of the film to cause an ultrasonic acoustic wave to be radiated from the film.

REFERENCES:
patent: 3396366 (1968-08-01), Midlock et al.
patent: 3816774 (1974-06-01), Ohnuki et al.
patent: 4015232 (1977-03-01), Sindle
patent: 4056742 (1977-11-01), Tibbetts
patent: 4278962 (1981-07-01), Lin
patent: 4322877 (1982-04-01), Taylor
patent: 4636997 (1987-01-01), Toyama et al.
patent: 4803670 (1989-02-01), Chen
patent: 4910512 (1990-03-01), Riedel
patent: 4967180 (1990-10-01), Wang
patent: 4980869 (1990-12-01), Forster et al.
patent: 5028920 (1991-07-01), Dombrowski
patent: 5059946 (1991-10-01), Hollowbush
patent: 5076384 (1991-12-01), Wada et al.
patent: 5160927 (1992-11-01), Cherry et al.
Measurement Science & Technology, vol. 3, No. 3, Mar. 1992, "Ultrasonic transducers and transducer arrays for applications in air".
M. Tamura et al.--"Electroacoustic Transducers with Piezoelectric High Polymer Films";; J. Audio Eng. Society 1975; vol. 23, pp. 21-26.

Affiliated with

Also associated with

Rating

Proximity sensor utilizing polymer piezoelectric film does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Proximity sensor utilizing polymer piezoelectric film, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Proximity sensor utilizing polymer piezoelectric film will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1232794