New Version of a Highly Sensitive Uniaxial Sensor for Seismic Accelerometers

Abstract

The article considers the design of a uniaxial highly sensitive sensor, which is a part of the triaxial seismic accelerometer. The problems of creating a strictly uniaxial sensor with the inclusion of additional magnetic stiffness by using SmCo (samarium–cobalt) permanent magnets are discussed. A model of a uniaxial sensitive sensor is constructed. Its original elements are elastic cantilevers that support the test mass of the oscillator, which create mechanical stiffness and at the same time provide for uniaxiality, and permanent magnets that introduce additional magnetic stiffness. The creation and testing of the sensor model by the method of tilting the base of the device have shown that the test results fit the estimated values of the sensor’s transducing steepness and dynamic range.