Seismic instruments: article

The development of accelerometer with wide amplitude and frequency range for laboratory model of fault
D.V. Krayushkin 1,2 P.A. Kaznacheev 1 V.V. Kokh 1 Z.-Yu.Ya. Maibuk 1 A.V. Ponomarev 1
1 Sсhmidt Institute of Physics of the Earth of the Russian Academy of Sciences 2 HSE University
Journal: Seismic instruments
Tome: 59
Number: 3
Year: 2023
Pages: 58–74
UDK: 550.34.01 + 531.768
DOI: 10.21455/si2023.3-4
Keywords: acceleration measurement, MEMS sensor, piezoelectric sensor, laboratory modeling, shock, fault
Аnnotation: The work is devoted to the development accelerometer for measurement of fast movements in laboratory experiment. In our previous experiments on the slider model of a seismogenic fault, it was revealed that the use of single sensitive acceleration sensor does not allow for qualitative and quantitative characterization of all observed movements. The high-amplitude movements could introduce the sensor into saturation, and the low-amplitude ones were on the response limit. To solve this problem, an accelerometer has been developed for measurement of acceleration in wide amplitude and frequency ranges. The accelerometer consists of two analog single-component piezoelectric sensors with a measuring range up to 500g and two digital three-component micro-electromechanical systems (MEMS) sensors with measuring ranges up to 8g and 400g. In shock-based tests, amplitudes and characteristic acceleration times were achieved, comparable to those of movements on the slider model of fault. The efficiency of the acceleration meter has been confirmed. It has been shown that the concurrent use of digital and analog sensors makes it possible to track non-uniformly scaled movements in more detail.