Communications – electrical: acoustic wave systems and devices – Distance or direction finding – With time interval measuring means
Patent
1982-11-15
1986-05-27
Jordan, Charles T.
Communications, electrical: acoustic wave systems and devices
Distance or direction finding
With time interval measuring means
73587, 367129, G01D 700, G01S 380
Patent
active
045920346
ABSTRACT:
A small non-colinear transducer array for omnidirectional acoustic emission monitoring is disclosed. The small transducer array consists of four piezoelectric sensor elements of sufficiently small diameter as to function as essentially point receivers and of sufficient frequency response as to be sensitive to the signals to be detected. The sensor elements of the transducer array are close together and are non-colinear so that the signals received by them can be used for determining the group velocity of acoustic waves on solid plates and on plate-like structures such as shells and pipes, and to permit determination of both the source direction and distance. The array is designed to monitor the region exterior to the area enclosed by the array, and the ratio of the smallest distance between sensors to the radius of a single transducer element is relatively large in order to minimize measurement errors introduced by undertainties in transducer element positions caused by large transducer sizes with respect to the acoustic waves being received.
REFERENCES:
patent: 3723960 (1973-03-01), Harris
patent: 3725855 (1973-04-01), Murphree et al.
patent: 3822586 (1974-07-01), Pollock
patent: 3858439 (1975-01-01), Nakamura
patent: 3875381 (1975-04-01), Wingfield et al.
patent: 3890591 (1975-06-01), Bacquillon et al.
patent: 3914883 (1975-10-01), Bodine
patent: 3985024 (1976-10-01), Horah
patent: 4009463 (1977-02-01), Vercellotti
patent: 4011472 (1977-03-01), Feng
patent: 4033179 (1977-07-01), Romrell
patent: 4037189 (1977-07-01), Bell et al.
patent: 4088907 (1978-05-01), Jones et al.
patent: 4268712 (1981-05-01), Overall
patent: 4309903 (1982-01-01), Ono
patent: 4481818 (1984-11-01), Hellquist
patent: 4506354 (1985-03-01), Hansen
Golinelli, S., A Minicomputer in an Acoustic Emission Source Location System, 12/75.
McElroy, Acoustic Emissions of Buried Pipelines, Acoustic Emission Monitoring of Pressurized Sys., ASTM STP 697, ASTM (1979), pp. 47-59.
Tatro et al., On-Line Safety Monitoring of a Large High Pressure, High Temp. Autoclave, Acous. Emission Monitoring of Press. Sys., ASTM STP 697, ASTM (1979).
Hutton et al., Acous. Emission Meas.: HSST V-7B Intermediate Vessel Test, Acous. Emission Monitoring of Press. Sys., ASTM STP 697, ASTM (1979), pp. 106-130.
Voltava et al., Inspec. of Nuclear Reac. by Means of Acous. Emission During Hydro. Test., Acous. Emiss. Monit. of Press. Sys., ASTM STP 697, ASTM (1979).
Nakosa, Instru. and Signal Proc. for Monit. Struc. Integrity by Acous. Emiss., Proc. Int'l. Conference on Acous. Emiss., Anaheim, Cal., 1979, pp. 65-86.
Tomaguchi et al., Acous. Emiss. Source Location by Ident. and Comb. of Signals, Proc. Int'l. Conf. on Acous. Emiss., Anahein, Cal., 1979, pp. 49-64.
Nakasa et al., Development of a Multichannel Acous. Emiss. Instru. Sys. for Field Applns., Proc. The 5th Acous. Emiss. Symposium, Tokyo, 1980, pp. 327-338.
Hatano et al., Acous. Emiss. Source Location Using Face-Centered Trans. Arrays, J. of Elec. and Comm. in Japan, vol. 61, No. 10, 1978, pp. 97-104.
Tobias, Acous. Emiss. Source Location in Two Dimensions by an Array of Three Sensors, Nondestructive Testing, Feb. 1976, pp. 9-12.
Asty, Acous. Emiss. Source Location on a Spherical or Plane Surface, Non-Destructive Testing Int'l., Oct. 1978, pp. 223-226.
Pao, Theory of Acous. Emiss., in Elastic Waves and Non-Destructive Testing of Materials, AMD, vol. 29, Y. H. Pao. Ed., ASME, N.Y. (1978), pp. 107-128.
Rundorf, Acous. Emiss. Source Location in Theory and Practice, Proc., The 5th Int'l. Acous. Emiss. Symposium, Tokyo, 1980, pp. 91-102.
Rundorf, Location of Microseismic Activity, Proc. . . . , Int'l. Conf. on . . . Microseismic Activity, 1981.
Carter, Time Delay Estimation for Passive Sonar Signal Proc., Trans. IEEE on Acous., Speech & Signal Proc., Part II of 3 Parts, Spec. Issue on Time Delay Estimation, vol. 1, ASSP-29, No. 3, 1981, pp. 463-470.
Carter, Passive Ranging Errors Due to Receiving Hydrophone Position Uncertainty, J. Acous. Soc. Am., vol. 65, No. 2, 1979, pp. 528-530.
Sackman, The Use of Phase-Difference Trace Func. for Bearing Estimation with Small Arrays, In Reference 14, pp. 501-507.
Kirlin et al., Improvement of Delay Measurements Fron Sonar Arrays Via Sequential State Estimation, In Reference 14, pp. 514-578.
Clay et al., Use of a Two Dimensional Array to Receive an Unknown Signal in a Dispensive Waveguide, J. Acous. Soc. Am., vol. 47, 2/70, pp. 435-444.
Clay et al., Error Analysis of Velocity and Direction Meas. of Plane Waves Using Trick Large Aperture Arrays, J. Acous. Soc. Am., vol. 53, 4/73, pp. 1161-1166.
Sachse et al., Signals in the Far-Field of an AE Source, Ultrasonics Int'l. 1981: Conf. Proc., IPC Science & Tech. Press., Guilford, England (1979) in press.
Weaver et al., Axisymmetric Elas. Waves Excited by a Point Source in a Plate. Part I. Theory . . . in Normal Modes, J. Appl. Mech., 1981 (to appear).
Courant et al., Method of Mathematical Physics, vol. I, p. 36.
Weaver et al., Axisymmetric Elastic Waves Excited by a Point Source in a Plate, Part II, Surface Responses, J. Appl. Mech., 1981 (to appear).
Sachse Wolfgang H.
Sancar Selcuk
Cornell Research Foundation Inc.
Jordan Charles T.
Steinberger Brian S.
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