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Byeung-Leul Lee Seung-Jae Lee Dae-Joong Moon Jin-Woo JungAbstractIn this study, an efficiency test was performed by fabricating MEMS (Micro Electro Mechanical Systems) based 3-axis acceleration sensor modules and an earthquake monitoring system was composed. Data acquisition device (NI-9239) with a 24bit ADC (Analog to Digital Converter) was used for improving the performance of 3-axis acceleration sensor modules and filtered data (100Hz Low Pass Filter) was used for reducing noises. Also this paper focused on detecting meaningful vibration in the building by developing the earthquake monitoring software. If vector sum of 3-axis acceleration is greater than the preset value, the value will be recordedand saved to the file.Keywords : Dynamic range, Earthquake monitoring system, MEMS sensor, Vector sum, 3-axis accelerometer

Efficiency Test for Low Electric Power Type and MEMS Based 3-axis Accelerometer