Latest revision as of 14:21, 30 November 2021

Abstract

The newly developed low-cost micro-electro-mechanical system (MEMS)-based acceleration sensors exhibit sufficient accuracy and stability to monitor the shaking of structures caused by an earthquake. We have developed a practical shaking-monitoring system using MEMS-based acceleration sensors and a 920 MHz multi-hop radio communication method that offers reliable radio wave communication, even within buildings. In this system, the base clock of each sensor unit must be closely synchronized to the master clock to minimize acceleration-induced phase synchronization error. In the proposed system, this error can be limited to three milliseconds in a system of multiple sensor units.

Full document

References

[1] Cultural Properties Protection Department, Guideline for Assessing Seismic Resistance of Important Cultural Properties (Buildings), (2012).

[2] Nagai, N., Mita, A., Yakoh, T. and Sato, T.: Wireless Sensor for Structural Health Monitoring, Journal of Japan Association for Earthquake Engineering, Vol.3, No.4 (2003), pp.1-13.

[3] Sawada, M., Shiba, Y. and Oguni, K.: Development of robust time synchronization method for wireless sensor network, Journal of Japan Society of Civil Engineers A1 (Structural Engineering & Earthquake Engineering), Vol.65, No.1 (2009), pp.30-37.

[4] Nakannishi, Y.: Development and operation of the practical field monitoring systems based on openATOMS, Proceedings of Annual Conference of Electronics, Information and Systems Society (2011), pp.724-727.

[5] Allen Fan: How to Improve the Accuracy of Inclination Measurement Using An accelerometer, AnalogDialogue, Vol.52 (2018), Analog Devices.

[6] Takahiro Yamasaki, Yuichiro Amano, Kana Ota, Mitsuhiro Miyamoto and Masatoshi Okada: Development of wireless acceleration measurement system applied to structural health monitoring – Consideration for introduction to existing buildings -, Journal of Structural and Construction Engineering (Transactions of AIJ), Vol.84, No.765, pp.1389- 1399. (2019.11).