Abstract

In Japan, deterioration of the building structures in 1970’s becomes a social problem. They become lifelong duration due to be fixed and repaired. Therefore, it is important to check and manage the building structures on a daily basis. However, there are two problems of the checking. One is a shortage of specialists of the checking, the other is place regulation of infrastructure such as the bridges and highways. In this paper, we propose a damage identification monitoring system. It allows ordinary person to check the buildings structures with Fourier spectrum. We employ ARM & FPGA board to measure and analyze Fourier spectrum and also employ XBee ZB to construct wireless mesh network. In addition, we develop a low cost vibrometer using piezo-electric devices. The proposed system manages data of the building structures in all of our country, and finds damage of them. We are able to check Fourier spectrum and results of damage identification through Web application through a cloud server. In evaluations, the proposed system was able to detect a broken point of a test bridge. And we measured power consumption of the proposed system. Power consumption of it was low enough to drive it with only solar power and battery system

Highlights

  • Most building structures, such as office buildings, bridges, high ways, and so on, were built in 1970’s and 1990’s in japan

  • We develop a low cost vibrometer using piezo-electric devices which are put on the building structures

  • In order to analyze the Fourier spectrum of vibration of the building structures preciously, we evaluate the proposed system with a test bridge

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Summary

Introduction

Most building structures, such as office buildings, bridges, high ways, and so on, were built in 1970’s and 1990’s in japan. The building structures are checked by looking and hammering test of specialists. We have to develop a damage identification monitoring system by which everyone can check the building structures without the specialists of checking and hammering test of the building structures. We are developing the damage identification monitoring system for the building structures. It allows us to find the place and degree of the damage by processing signals of vibration in the building structures. We develop a low cost vibrometer using piezo-electric devices which are put on the building structures. A previous work shows that it is possible for us to find the place of the damage on the building structures by the vibrometer using piezo-electric devices(1). This paper will propose the low cost and low power damage identification monitoring system for the building structures. We will show a system organization using low cost FPGA board, PSoC, Zigbee, and A/D converter and evaluate it

Related works
The Proposed System
Overall Structure of the Damage Identification Monitoring System
Measurement Modules
Measurement Controller and Format Converter
Fast Fourier Transform IP
Synchronous Module
Cloud Server
Analysis of Fourier spectrum with Measurement Modules
Spectrum of The Test Bridge
Power Consumption
Conclusions and Future Works
Full Text
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