Title :
Seismic accelerometer
Author :
García, Fernando ; Hixson, Elmer L. ; Huerta, Carlos I. ; Orozco, Horacio
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA
Abstract :
The design, model, implementation, and test of a seismic accelerometer is presented in this paper. The sensing element is a flexural-type piezoelectric ceramic, known as bimorph. The analytical model of this transducer was developed and validated experimentally. The natural frequency (f0), the useful flat range, sensitivity, and cutoff frequencies at the lower and upper end of the device are discussed. Experimental results shown that the frequency response of the prototype is from 4 to 120 Hz at ±3 dB with a sensitivity of 27 dB for 1 mV/m/sec2. The electromechanical parameters, responsible for controlling the device characteristics, are presented and analyzed in great detail in order to demonstrate a simple technique to measure ground motion
Keywords :
accelerometers; equivalent circuits; frequency response; piezoelectric transducers; seismometers; vibration measurement; bimorph; cantilever beam; cutoff frequencies; design; electromechanical parameters; energy conversion equations; equivalent circuit; flexural-type piezoelectric ceramic; frequency response; ground motion measurement; implementation; model; natural frequency; seismic accelerometer; sensitivity; testing; useful flat range; Accelerometers; Analytical models; Ceramics; Cutoff frequency; Frequency response; Motion control; Motion measurement; Piezoelectric transducers; Prototypes; Testing;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1999. IMTC/99. Proceedings of the 16th IEEE
Conference_Location :
Venice
Print_ISBN :
0-7803-5276-9
DOI :
10.1109/IMTC.1999.776024
