|(11)||EP 2 829 896 A3|
|(12)||EUROPEAN PATENT APPLICATION|
|(54)||Temperature compensation for seismic sensor and for method of acquisition of a seismic signal|
|(57) A seismic sensor detects a characteristic of a medium during a seismic survey. The seismic sensor includes a casing (302); a magnet (304) located inside the casing (302); a coil assembly (306) located inside the casing (302), wherein the coil assembly (306) moves relative to the magnet (304); and a temperature-sensitive device (320) connected to terminals (310) of the coil assembly (306) and configured to improve the damping. The magnet (304) and the coil assembly (306) produce some intrinsic damping and the additional damping introduced by the temperature-sensitive device (320) is selected to counterbalance the temperature-dependent intrinsic damping so that a phase of a recorded seismic signal is compensated for temperature induced magnetic field changes.