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成果報告書詳細
管理番号20170000000622
タイトル*平成28年度中間年報 インフラ維持管理・更新等の社会課題対応システム開発プロジェクト インフラ状態モニタリング用センサシステム開発 高信頼性センサによるインフラモニタリングシステムの研究開発  
公開日2017/8/3
報告書年度2016 - 2016
委託先名横河電機株式会社
プロジェクト番号P14011
部署名ロボット・AI部
和文要約
英文要約Title: Research and development of the infrastructure monitoring system with the high reliability sensors.

In this year, some developed sensors were installed in a real building, and a performance test of the whole system was conducted. The target building has 20 stories above the ground which is planned to be demolished. The measurement by the sensors and the wireless data transmission in the every hour was performed, and whole operation of the system was confirmed.
1) Development of high reliability and high sensitivity silicon resonating accelerometer
To improve the resolution of the accelerometer and the inclination sensor, the detection circuits was improved. The resolution of accelerometer was 1uG/Hz^(1/2) and the resolution of inclination was 0.001degree and the both were established 10 times higher for the first target of the sensors.
2) Development of high reliability distortion sensor
The silicon resonating type distortion sensor was intensively developed. For the sensitivity of the measurement, 10ne which is 100 times higher targeted sensitivity was obtained. Sensor structure to compensate for the distortion of the sensing element by the environmental temperature change was investigated, and temperature compensation properties were confirmed.
3) Development of the wireless-communications module
The operation and the performance of the wireless-communication module were demonstrated in the real building. GPS time was adopted for the synchronization for the system, but it became clear that the cable length for GPS restrict the location of the receivers at the indoor setting. Alternative method is currently underway.
4) Development of the self-supporting power supply module for sensors
Development to implement a wireless communication board and a battery to a case was conducted. The prototype of the sensor node equipped with an energy harvest circuit was fabricated.
5) Development of the data acquisition system
A validation test of the developed system was conducted using a two-story building model. The interface with primary diagnosis processing and the second diagnosis processing was established. Start sequence and result display part were implemented. The system was also installed in the real building, and the continuous operation was confirmed.
6) Development of a data analysis system
The developed waveform processing program was implemented in the system. The vibration test on using the building model and the real building were conducted, and the system operation and the program execution were verified. In the performance test in the real building, the calculations of displacement of wave form and seismic intensity were confirmed.
7) Development of method of detailed damage evaluation of the structure by system identification method
Building diagnosis method by the recursive subspace state space system identification using the accelerogram data of the structure was established. As a result of applying the method mentioned above to the vibration data in the real building, the every moment change of the natural frequency of the building was identified with high accuracy.
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