Developments of non-contact data acquisition techniques in electrical and electromagnetic explorations

Shima, Hiromasa; Sakashita, Susumu; Kobayashi, Teiichi

doi:10.1016/0926-9851(96)00018-3

Cited by 21 publications

(6 citation statements)

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“…Later studies, from the 1990s onward, include a variety of empirical, technical and theoretical information that has been incorporated into the current practical designs. Surface measurement systems include the electrostatic quadrupole as described by Grard and Tabbagh (1991), Tabbagh et al (1993) and Panissod et al (1998), the multichannel capacitive electrode system as described by Shima et al (1995;1996) and a number of commercial instruments (Møller, 2001;Lee et al, 2002;Pellerin et al, 2003;Chouteau et al, 2004). Borehole resistivity tools with capacitive sensors have been described by Bristow and Mwenifumbo (1998), Mwenifumbo and Bristow (1999) and Cottineau et al (2000).…”

Section: Introductionmentioning

confidence: 99%

Fundamentals of the capacitive resistivity technique

et al. 2006

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Capacitive resistivity (CR) is an emerging geophysical technique designed to extend the scope of the conventional methodology of DC resistivity to environments where galvanic coupling is notoriously difficult to achieve, for example across engineered structures (roads, pavements), hard rock, dry soil or frozen ground. Conceptually, CR is based on a four-point array capacitively coupled to the ground. Under A parametric study of the complex quasi-static transfer impedance reveals the existence of a restricted range of practical parameters that permits successful operation of CR instruments at low induction numbers. Theory predicts that emulation of the DC measurement is compromised if low-induction-number operation is not maintained throughout a survey area, for example in a zone of high conductivity.

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Section: Introductionmentioning

confidence: 99%

Fundamentals of the capacitive resistivity technique

et al. 2006

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“…generated. Any materials that present a contrast in electrical properties to the soil will disturb the induced current flow [13][14][15][16][17][18]. By using precisely controlled digital-to-analogue signal converter generating voltages at two transmitting capacitive plates, anomalies in the electric field near the surface resulting from the disturbance of current density in the ground can be detected (Figure 6) by using an ultrahigh impedance amplifier connected to receiving capacitive plates.…”

Section: Low-frequency Electromagnetic Fieldsmentioning

confidence: 99%

Site Assessment of Multiple-Sensor Approaches for Buried Utility Detection

Royal

Atkins

Brennan

et al. 2011

International Journal of Geophysics

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The successful operation of buried infrastructure within urban environments is fundamental to the conservation of modern living standards. Open-cut methods are predominantly used, in preference to trenchless technology, to effect a repair, replace or install a new section of the network. This is, in part, due to the inability to determine the position of all utilities below the carriageway, making open-cut methods desirable in terms of dealing with uncertainty since the buried infrastructure is progressively exposed during excavation. However, open-cut methods damage the carriageway and disrupt society's functions. This paper describes the progress of a research project that aims to develop a multi-sensor geophysical platform that can improve the probability of complete detection of the infrastructure buried beneath the carriageway. The multi-sensor platform is being developed in conjunction with a knowledge-based system that aims to provide information on how the properties of the ground might affect the sensing technologies being deployed. The fusion of data sources (sensor data and utilities record data) is also being researched to maximize the probability of location. This paper describes the outcome of the initial phase of testing along with the development of the knowledge-based system and the fusing of data to produce utility maps.

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“…Various instruments have been developed with the purpose of emulation of galvanic resistivity as the goal (Shima et al . ; Panissod et al . ; Kuras ) with the Geometrics OhmMapper™ being an example of a commercially available CR system.…”

Section: Introductionmentioning

confidence: 99%

Remote resistivity contrast mapping using the CARIS system at Terme de Caracalla archaeological site, Rome, Italy

Adams

Macnae

Davis

et al. 2010

Near Surface Geophysics

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We achieve remote resistivity‐contrast mapping through use of capacitive electric field sensors and an inductive electromagnetic source. A new instrument, called CARIS, was developed at RMIT University specifically for shallow archaeological, environmental and engineering geophysical investigations where electrical contact with the ground is undesirable or impossible. The aim of this paper is twofold, firstly to introduce the CARIS instrument and method and secondly, to demonstrate the potential of CARIS. A field test compares CARIS resistivity field data to a conventional dipole‐dipole ERT survey over an archaeological site in Rome. Lateral changes detected by the CARIS system are consistent with those obtained using conventional resistivity.

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Developments of non-contact data acquisition techniques in electrical and electromagnetic explorations

Cited by 21 publications

References 1 publication

Fundamentals of the capacitive resistivity technique

Fundamentals of the capacitive resistivity technique

Site Assessment of Multiple-Sensor Approaches for Buried Utility Detection

Remote resistivity contrast mapping using the CARIS system at Terme de Caracalla archaeological site, Rome, Italy

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