Browse Prior Art Database

Land Seismic Sensor with Collapsible Jacket to Facilitate Planting.

IP.com Disclosure Number: IPCOM000245615D
Publication Date: 2016-Mar-22
Document File: 6 page(s) / 272K

Publishing Venue

The IP.com Prior Art Database

Abstract

A gradient sensor unit with a collapsible jacket surrounding the outer diameter of the unit. As shown in the following figures 2-5 the unit would be comprised of the main sensor unit housing surrounded by a compressible foam sleeve and a protective outer jacket. The foam would then be compressed to facilitate insertion of the unit into a predrilled hole in the ground. Following insertion the foam could be released expanding the unit to fill the hole. The foam type utilized could either be shape memory foam or polyurethane foam. If shape memory foam is used the unit could be compressed before insertion and then the unit would expand with time after insertion. If the ground/ coupling conditions require harder foam then polyurethane foam can be used with a pin locking mechanism on the outer protective jacket. In this case the foam can be compressed and held in place by the pin mechanism. When the pin mechanism is released the foam would expand to fill the hole. As the foam is compressible the sensor can be removed by pulling it out of the ground as a conventional sensor would be removed. The foam would collapse when forced inward by any existing irregularities in the hole.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 58% of the total text.

Page 01 of 6

Page 1 of 6

Date:

SUMMARY

Background:

A gradient sensor contains two accelerometers separated by a distance on the order of tens of centimeters. Figure 1 contains an illustration of such a sensor. As a result of this required separation this type of sensor will be significantly longer than conventional land seismic sensors. This sensor will be deployed vertically and in order to ensure good coupling most of the sensor unit must be buried. Rather than digging a deep oversized hole to bury the sensor a drill can be used to create a hole in which to insert the sensor. If this hole is oversized, in order to ease the operation of inserting the sensor, the coupling and quality of the geophysical signal will suffer. On the other hand if the hole is undersized it will be difficult to insert the sensor into the ground. Additionally, the size of a hole resulting from a specific bit will vary depending on ground conditions. A sensor unit with the capability to increase in diameter following planting would allow more flexibility in the size of the planting hole and allow oversized holes to be drilled while still maintaining good coupling.

Invention:

A gradient sensor unit with a collapsible jacket surrounding the outer diameter of the unit. As shown in the following figures 2-5 the unit would be comprised of the main sensor unit housing surrounded by a compressible foam sleeve and a protective outer jacket. The foam would then be compressed to facilitate insertion of the unit into a predrilled hole in the ground. Following insertion the foam could be released expanding the unit to fill the hole. The foam type utilized could either be shape memory foam or polyurethane foam. If shape memory foam is used the unit could be compressed before insertion and then the unit would expand with time after insertion. If the ground/ coupling conditions require harder foa...