Abstract
Possibility of designing a seismometer based on the surface acoustic wave vibration sensor was reported. For the analysis of its properties, a theoretical model of the sensor transducer as a cantilever plate with a surface acoustic wave delay line, loaded with a seismic mass was developed. Description of the sensor mechanical part was simplified to the one degree of freedom damped mass-spring system. An explicit dependence of the plate geometry and material parameters, as well as the seismic mass size on the sensor frequency response was obtained. On this basis, the examples of vibration sensors with resonance frequencies useful in seismometry were manufactured. Tests confirmed the sufficient accuracy of the model to design and analyze a seismometer with the required properties. The proposed seismometer design is quite simple and its parameters may be competitive in relation to the currently used solutions.
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