Evaluation of Measurement Accuracy of the MEMS Accelerometer for Long Period and Large Amplitude Vibration

Kenta Hirai ,Hiroaki Harada ,Akira Mita ,Hirotaka Imaeda ,Takeshi Suzuki ,Hironobu Yao ,Shinji Kitagawa ,Minoru Kakinuma ,Yoshiyuki Komiya

doi:10.21741/9781644901311-27

Kenta Hirai , Hiroaki Harada + Show 7 more

Open Access

https://doi.org/10.21741/9781644901311-27

Copy DOI

Publication Date: Feb 20, 2021
Citations: 1	License type: cc-by

Affiliation: Nikken Sekkei (Japan), Fuji Electric (Japan)

Abstract

Abstract. Health monitoring systems are used to assess building damage immediately after an earthquake and have become widely utilized in Japan. For example, the system developed by the authors has been installed in more than 60 buildings since 2014. Such systems mostly rely on accelerometers to estimate the building performance. Recently, Micro electro mechanical system (MEMS) accelerometers have been increasingly applied for such uses due to their economic advantages. However, MEMS accelerometers are known to have relatively low measurement accuracy for certain frequency band excitations compared to servo type accelerometers. Past research has been undertaken to test their measurement accuracy, however, few studies review their performance under long period and large amplitude seismic motions. Evaluation of measurement accuracy in such conditions is essential since the system is also installed in tall buildings and isolated buildings with relatively long natural periods. Therefore, this study evaluates the measurement accuracy of the MEMS accelerometer under long period and large amplitude vibration based on the results of shake table testing.

Highlights

In recent years large earthquakes have occurred relatively often in Japan, and many more people are interested in building safety
Micro electro mechanical system (MEMS) accelerometers are known to have relatively low measurement accuracy for certain frequency band excitations compared to servo type accelerometers
MEMS accelerometers, few studies review their performance under long period and large amplitude seismic motions

Summary

Introduction

In recent years large earthquakes have occurred relatively often in Japan, and many more people are interested in building safety. The authors developed a health monitoring system using accelerometers in 2014. This system has been installed in more than 60 buildings and the validity of the system has been verified (Ishizaki, Imaeda, Harada, Shinohara, 2018). The monitoring system is installed in high-rise buildings and isolated buildings with relatively long natural periods. In this condition, the accuracy of accelerometer measurement for long period and large amplitude vibrations is important.

Methods

Results

Conclusion