Project UX-1353: GEM-3D (SEED)
Abstract
A new frequency domain (FD) UWB electromagnetic induction (EMI) sensor, the GEM-3D, was constructed, debugged, demonstrated at the bench and `backyard" level. Proceeding from the configuration of the existing Geophex GEM-3, two additional orthogonal receivers were located at the center of the sensor head, so that the new instrument completely define field that constitutes the EMI response of an object of interest. The instrument has an expanded bandwidth from 30 Hz at least 50 kHz, with a maximum of about 15 frequencies recordable in each vector channel. The new sensor is handheld, therefore capable of being swept and tilted in any direction, generating arbitrary angles of excitation and reception ("views") laser positioning system that was implemented is capable of sub-millimeter accuracy, and was configured to provide all tilt angles. The bench version of the instrument that was achieved appears to work well by both quantitative and qualitative criteria.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 30, 2004
- Accession Number
- ADA480945
Entities
People
- Kevin O’neill
Organizations
- Engineer Research and Development Center