Measuring and testing – Speed – velocity – or acceleration – Acceleration determination utilizing inertial element
Patent
1975-08-07
1976-12-07
Queisser, Richard C.
Measuring and testing
Speed, velocity, or acceleration
Acceleration determination utilizing inertial element
73 675R, G01H 500
Patent
active
039955010
ABSTRACT:
A new location arrangement is made of a shear transducer in a transducer sonic velocity apparatus, as for core testing, in which a shear transducer is placed between or next to a contact piece and a compression transducer so that loading of the shear generator by the compression transducer is avoided. In another embodiment, both the shear and compressional transducers are at substantially the same point or in the same plane so that the time zero is the same for both the compressional and shear measurements. In another embodiment, the shear transducer surrounds, but does not contact, the compressional transducer, and both the shear and compressional transducers contact a mounting plate or platen in about the same plane so that the time zero is the same for both the compressional and shear measurements.
Increased shear and compressional signals can be obtained by placing an oil depending film between a shear and its corresponding compressional transducer. In another embodiment, an oil decoupling film is provided between a compressional transducer, which is surrounded by a shear transducer, and a platen or contact piece which decouples the compressional transducer from the shear transducer.
REFERENCES:
patent: 3354983 (1967-11-01), Erikson et al.
patent: 3537541 (1970-11-01), Desai
J. Van Steveninck, Apparatus for Simultaneous Determination of Longitudinal and Shear Wave Velocities Under Pressure, Journal of Scientific Instruments, 1967, vol. 44, p. 379-381.
Beauchamp John P.
Phillips Petroleum Company
Queisser Richard C.
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