Preliminary design of a RESPER probe prototype, configured in a multi dipole-dipole array

Details Preliminary design of a RESPER probe prototype, configured in a multi dipole-dipole array Preliminary design of a RESPER probe prototype, configured in a multi dipole-dipole array

2011-04-14

arxiv.org/abs/1104.2743v2

Physics

Geophysics

49 pages, 17 in the text + 5 figures in the appendices; Rapporti Tecnici INGV (ISSN 2039-7941), Numero 191 Anno 2011

Scientific paper

The RESPER probe has been assembled, except the ferrules that must ensure the contact, by insulating materials and more specifically in Tufnol, as regards the support plates, and Teflon, as regards the standoffs. A series of holes has been drilled on the surface of support plates in order to allow approaching each other of the two central electrodes to external ones, from a minimum of 4.29 cm to a maximum of 10 cm. The dipole-dipole array defined by the integer parameter n = 6 could not be implemented, as the positioning of suitable "spring" shafts requires 6 mm holes and an adequate space could not be available to carry out the drilling. The presence of these "spring" shafts allows reaching a right prominence of the tip from the base and, at the same time, a certain amount of pressure which ensures the proper adherence to the artifact that must be tested. There is a brass screw within each shaft, which edge has been turned to the measurement of 1.4 mm. Four metal spacers are replaced of time in time depending on the configuration that is to be adopted. The achievement of height l(n) from the plates is ensured by the presence of metallic spacers. To complete the description, a copper cable, 1 m long and with a 4.0 mm2 section area, has been welded to the head of each electrode. The two transmitting or reading cables are kept at a fixed distance L(n) between them by means of Teflon rods in which has been applied the same series of holes existing on the Tufnol plates.

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