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In recent years, smartphones experienced a fast technological growth, approaching its computational capacity to personal computers. In addition to that, new hardware and sensors are being incorporated into these devices. The smart phone's embedded sensors are a low cost solution that allows interactions between humans, computers and the environment. Examples include applications designed to identify...
Conventional methods in horizontal drilling processes incorporate magnetic surveying techniques for determining the position and attitude of the bottom-hole assembly (BHA). This results in an increased weight of the drilling assembly, higher cost due to the use of nonmagnetic drill collars necessary for shielding the magnetometers, and significant errors in the position of the drilling bit. A novel...
In this paper an algorithm is presented for positioning based on inertial navigation aided by using geomagnetic field intensity. The idea is based on matching noisy samples of geomagnetic intensities by the magnetometers and a priori geomagnetic map. The traditional Iterative Closest Point (ICP) algorithm is then applied in combination with the Inertial Navigation System (INS) to update its cumulative...
Geomagnetic field is one of the geophysical fields of the Earth and can be used to limit the error accumulation of the inertial navigation system (INS). A geomagnetic aided navigation system is proposed in the paper. Two alternate processes are designed in the system - the match and the filter. In the former part, a contour constraint based correlation method is used to eliminate the initial position...
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