Patent ID: 9389324
Filing Date: 2016-07-12
CPC Classification: G01D,G01V

Claim Text:
1. A seismic sensor for detecting a characteristic of a medium during a seismic survey, the seismic sensor comprising: a casing; a magnet located inside the casing; a coil assembly located inside the casing, wherein the coil assembly moves relative to the magnet; and a temperature-sensitive device connected to terminals of the coil assembly, wherein the magnet and the coil assembly produce a temperature-sensitive intrinsic damping and the temperature-sensitive device produces an additional damping that is selected to counterbalance the temperature-sensitive intrinsic damping to obtain a compensated damping that reduces effects of a changing magnetic field so that a phase of a recorded seismic signal is compensated for temperature-induced magnetic field changes, and wherein the additional damping varies with temperature.