Elephants can cause people harm and destroy property in communities livingclose to national parks. Having an automated system that can detect and warnthe people of these communities is of utmost importance in order for human andelephant coexistence. Elephants heavy profile and damped footsteps induce lowfrequency ground waves that can be picked up by geophones. In the thesis twomain problems are investigated, detecting if the geophone measurements contain an elephant footstep and calculating the direction of the elephant footstep.A real time system is built containing a sensor array of three geophones. By analyzing the frequency content of the geophone measurements, elephant footstepscould be detected. The system in capable of detecting elephants situated up to40 meters away from the geophones. Utilizing the sensor array, a direction to theelephant was estimated using triangulation. Two methods of triangulation wereinvestigated. At 15 meters away, the estimation deviated with only a few degrees.At 40 meters away, the estimation was at least good and consistent enough to geta general idea of where the elephant was coming from.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:liu-193109 |
| Date | January 2022 |
| Creators | Wahledow, Erik, Sjövik, Philip |
| Publisher | Linköpings universitet, Reglerteknik |
| Source Sets | DiVA Archive at Upsalla University |
| Language | English |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
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