Sensor coupling in acoustic media using reciprocity

Vos, J. W. E.; Drijkoningen, G.G.; Fokkema, J.T.

doi:10.1121/1.426831

Cited by 6 publications

(5 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tan (1987) concludes that, for perfect coupling, the density of the measuring device has to be the same as the density of the medium. Vos et al (1999) suggest that this condition may not be sufficient. They make a distinction between contact coupling, which is perfect if the sensor follows exactly the motions of the surrounding medium (perfect contact between sensor and surroundings), and interaction coupling, which is perfect if the motion of the medium is not influenced by the presence of the sensor (sensor as a scatterer).…”

Section: Coupling Issuesmentioning

confidence: 88%

3D Seismic Survey Design, Second edition

Vermeer¹

2012

View full text Add to dashboard Cite

Section: Coupling Issuesmentioning

confidence: 88%

3D Seismic Survey Design, Second edition

Vermeer¹

2012

View full text Add to dashboard Cite

“…Tan (1987) considered the effect of the spikes firstly who used the Betti-Rayleigh reciprocal theory to study the coupling resonant system effect when the spike was well-coupled with the ground [12] . Vos et al (1995Vos et al ( , 1999 divided the geophone coupling into two parts. One was the "interaction coupling" when the spike was well-coupled with the ground, and the other is "contact coupling" when the spike was not well-coupled with the ground.…”

Section: Introductionmentioning

confidence: 99%

“…One was the "interaction coupling" when the spike was well-coupled with the ground, and the other is "contact coupling" when the spike was not well-coupled with the ground. Aiming at the problem of the "interaction coupling", Vos studied the coupling transmission law between the columned or rectangular spike and ground based on acoustic theory of reciprocity and found that "interaction coupling" would make the difference obviously between the geophone velocity and the truly ground velocity without geophone even if the spike was well-coupled with the ground [13,14] . But the conclusions based on the acoustic theory of reciprocity were of great application limitation to the seismic waves.…”

Section: Introductionmentioning

confidence: 99%

A Theoretical Study on the 3‐Degree Freedom Geophone Coupling System for Areas with Limestone Outcrops

Shi¹,

Tian²,

Shen³

et al. 2010

Chinese J of Geophysics

View full text Add to dashboard Cite

There is a great potential of extremely abundant oil and gas resources in sedimentary basins of marine carbonate in vast areas of South China. However, it is very difficult to make a good geophone coupling in the field work because of large‐area outcrops of hard limestone, which lead to decline of quality of seismic data and serious limit on hydrocarbon exploration there. Now, geophone coupling test is largely blind due to lack of appropriate theoretical guidance. In this paper, in order to understand the transmission mechanism of the geophone‐limestone coupling system, considering that the coupling media such as gesso, clay and so on involved in field seismic data acquisition, we propose a theory of geophone‐limestone 3‐DOF (degrees of freedom) coupling system based on the vibration dynamic concept. The geophone‐limestone coupling system responses are computed with varying parameters of coupling media, geophone spikes and damping. We find that the geophone‐limestone coupling system is a resonance system which has three resonance frequencies. The results show that the resonance frequency can be increased through increasing the elastic modulus of the coupling medium, reducing the area of the underside and the height of the coupling medium, using spikes with lower material density, reducing the height of the spike and increasing the area of the spike's underside. The results also show that the impact of the narrow frequency bands “band pass filtering” can be decreased by increasing the damping of the coupling system properly. Finally, we preliminarily validate the theoretical model of the geophone‐limestone 3‐DOF coupling system through experiments on a shake table.

show abstract

“…And the theoretical models of geophone-ground coupling include "interaction coupling model", "stack effect model" and "2-DOF model". Using "Interaction coupling model", some scholars had studied the coupling transmission law when the spike was well-coupled with the ground and the results showed that "interaction coupling" would make the difference obviously between the geophone velocity and the truly ground velocity without geophone even if the spike was well-coupled with the ground (Tan, 1987;Vos, 1995Vos, , 1999Rademakers, 1996;Drijkoningen, 2006). Jinxi Xu et al (1999) raised the "stack effect" theoretical model and found that the "stack effect" caused by the length of the spike is equivalent to a low-pass filter.…”

Section: Introductionmentioning

confidence: 99%