Long-period vibration sensor and method for correcting output value of the long-period vibration sensor

摘要

PROBLEM TO BE SOLVED: To provide a long-period vibration sensor which is structurally simple and superior in convenience, and has low power consumption.;SOLUTION: The long-period vibration sensor includes: an overdamping type accelerometer 10A which includes a magnet fixed in a case, a detection coil arranged between magnetic poles formed of magnets, a bobbin for holding the detection coil, and a support spring for supporting the bobbin so that the bobbin can vibrates in a predetermined direction in the case, and outputs a voltage by the detection coil when the bobbin is damped; a plurality of digital filters 31_1-m which have mutually different frequency characteristics; and an arithmetic processing part 32 which selects one digital filter 31_n out of the digital filters 31_1-m on the basis of the output value of the voltage output from the overdamping type accelerometer 10A, and corrects the output value using the selected digital filter 31_n.;COPYRIGHT: (C)2013,JPO&INPIT