Optical Sensor System for Low-cost Frac Monitoring SBIR Phase I Final Report
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04 OIL SHALES AND TAR SANDS↗
Engineering topics
Christensen, Caleb A.
Publications and source records attributed to Christensen, Caleb A..
Low-cost, high-performance infrasound sensor array system Phase I Final Report
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98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL P↗
Optical seismic sensor systems and methods
Disclosed is an optical seismic sensor system for measuring seismic events in a geological formation, including a surface unit for generating and processing an optical signal, and a sensor device optically connected to the surface unit for receiving the optical signal over an optical conduit. The sensor device includes at least one sensor head for sensing a seismic disturbance from at least one direction during a deployment of the sensor device within a borehole of the geological formation. The sensor head includes a frame and a reference mass attached to the frame via at least one flexure, such that movement of the reference mass relative to the frame is constrained to a single predetermined path.
47 OTHER INSTRUMENTATION↗