Communications – electrical: acoustic wave systems and devices – Seismic prospecting
Patent
1990-01-05
1992-03-10
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
367 75, 73598, G01V 100, G01N 2904, G01H 302
Patent
active
050954652
ABSTRACT:
An in situ method is disclosed for determining the structural integrity, set time and locations of anomalies or voids within a material as the material is being cured. Surface waves are transmitted and received a known distance along the surface of the material so that a substantially constant surface wave velocity can be calculated by dividing the known distance by the time it takes for the surface waves to travel the known distance. Surface wave velocity remains substantially constant for all wavelength measurements which do not exceed the thickness of the material. Structural integrity of the material, set time of the curing material and the detection of voids within the material can be determined from the substantially constant surface wave velocity. Structural integrity is determined as being proportional to the substantially constant surface wave velocity. Set time is determined from the slope or variation of substantially constant surface wave velocity plotted at various times during the curing process. Voids are determined as locations within the material causing surface wave velocity to change from substantially constant surface wave velocity to substantially non-constant surface wave velocity.
REFERENCES:
patent: 4372163 (1983-02-01), Tithmann et al.
patent: 4703460 (1987-10-01), Kurkjian et al.
patent: 4913157 (1990-04-01), Pratt et al.
patent: 4926070 (1990-05-01), Brandenburger
Stokoe, K. et al., "In Situ Testing of Hard-to-Sample Soils", Proceedings, Thirteenth Geotechnical Engineering Conference, Turin, Italy, invited paper, Nov. 1987, 60 pp.
Nazarian, S. et al., "Near-Surface Profiling of Geotechnical Sties by Surface Wave Method", 56th Annual International Meeting of Society of Exploration Geopysicists, Apr. 1986.
Nazarian, S. et al., "Application of Seismic Methods in Pavement Design and Analysis", Expanded Abstract, Society of Exploration Geophysicists, Nov. 1989.
Mok, Y. et al., "Use of Inverse Theory to Analyze Downhole Seismic Data", Expanded Abstract, Society of Exploration Geophysicists, Nov. 1989.
Rix, G. e al., "In Situ Testing of Landslide Debris in Valtellina, Italy Using Surface Waves", Expanded Abstract, Society of Exploration Geophysicists, May 1988.
Sanchez-Salinero, I. et al., "Analytical Evaluation of Variables Affecting Surface Wave Testing of Pavements", Transportation Research Record 1136, 1987.
Nazarian, S. et al., "Use of Surface Waves in Pavement Evaluation", Transport Research Record 1070, 1986.
Mok, Y. et al., "Analysis of Downhole Seismic Data Using Inverse Theory", Proceedings, Ninth World Conference on Earthquake Engineering, Tokyo, Japan, Apr. 1989, pp. 65-70.
Woods, R. et al., "Shallow Seismic Exploration in Soil Dynamics", Proceedings, Richart Commemorative Lectures, Geotechnical Engineering Division, ASCE, Oct. 1985.
Rix, G. et al., "Stiffness Profiling of Pavement Subgrades", Transportation Research Record 1235, 1990.
Stokoe, K. et al., "In Situ Seismic Testing with Surface Waves", Proceedings Twelfth International Conference on Soil Mechanics and Foundation Engineering, Rio de Janeiro, Brazil, vol. I, Balkema, Rotterdam, Aug. 1989, pp. 331-334.
Stokoe, K. et al., "In Situ Seismic Testing of Hard-to-Sample Soils by Surface Wave Method", Proceedings, American Society of Civil Engineers, Specialty Conference on Earthquake Engineering and Soil Dynamics II--Recent Advances in Ground Motion Evaluation, Park City, Utah, Jun. 1988.
Mok, Y. et al., "In Situ Damping Measurements by Crosshole Seismic Method", Proceedings, American Society of Civil Engineers, Specialty Conference on Earthquake Engineering and Soil Dynamics II--Recent Advances in Ground Motion Evaluation, Park City, Utah, Jun. 1988.
Nazarian, S. et al., "Determination of Pavement Layer Thicknesses by SASW Method", Transportation Research Record 1196, 1989.
Sheu, J. et al., "Effect of Reflected Waves on SASW Testing of Pavements", Transporation Research Record 1196, 1989.
Stokoe, K. et al., "Use of Rayleigh Waves in Liquefaction Studies", Proceedings, Measurement and Use of Shear Wave Velocity for Evaluating Dynamic Soil Properties, Geotechnical Engineering Division, ASCE, May 1985, pp. 1-17.
Nazarian, S. et al., "Nondestructively Delineating Changes in Modulus Profiles of Secondary Roads", Transportation Research Record 1136, 1987.
Sheu, J., "Applications and Limitations of the Spectral-Analysis-of-Surface-Waves Method", Ph.D. Dissertation, The University of Texas at Austin (Dec. 1987).
Board of Regents , The University of Texas System
Moskowitz Nelson
LandOfFree
In situ testing with surface seismic waves of materials having p does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with In situ testing with surface seismic waves of materials having p, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and In situ testing with surface seismic waves of materials having p will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2289868