成果報告書詳細
管理番号20160000000469
タイトル*平成27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2016/7/22
報告書年度2015 - 2015
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: System development projects for social problems such as the infrastructure maintenance and update. Sensor system development for infrastructure state monitoring. Research and development of the infrastructure monitoring system with the high reliability sensors.

In this year, the system design of the structure health monitoring was defined through the reviewing the required sensor resolution for an evaluation of the soundness of the structure and the investigation about the analytical method of the sensor data.
In development of high reliability and high sensitivity silicon resonating accelerometer it was confirmed that the resolution of accelerometer was 10uG/Hz and the resolution of inclination was 0.01degree and the both were satisfied with the first target of the sensors. As a joint development theme with the NMEMS technology research association, a bi-axial inclination sensor and communication circuit with silicon resonating sensors was manufactured, and the operation check was completed.
In development of high reliability distortion sensor, the mounting method, which could drastically reduce the temperature dependence of the sensor,was designed and manufactured, and a desired temperature compensation function was obtained by three layered structures of silicon / ceramic / metal. There are two types of the distortion sensors; the highly precise sensor and the wide range sensor. The silicon resonating type was applied for the high precision measurement and the silicon piezo resistive type was applied for the wide range measurement. The basic performances of the sensors were demonstrated through experiment.
In development of the wireless-communications module, it was decided that the frequency band was set to 920MHz, and the wireless communication module based on ARIB STD-T108 was manufactured. The basic communication protocol was also developed. The effectiveness of the communication control, the confirmation of the data transmission area and the transmission of the sensor data in routine state and in emergency state was verified.
In development of the self-supporting power supply module for sensors, the combination of rechargeable battery and power generation elements was selected, and the prototype of the self-supporting power supply module was manufactured. The generation efficiency of the power supply in the assuming environment was performed. In addition, the transmission efficiency of the wireless power feeding system was optimized, and the reasonable result according to design was verified by the power transmission experiment with the prototype.
In development of the data acquisition system, the system specifications were decided, and the data collection software was designed. Although the emergency collection with continual data and the routine data acquisition system were planned to be designed as the different system, the unified system was concluded to be more effective. The software of the data collection system was accomplished, and fundamental program operation was inspected.
In development of a data analysis system, it was intended to evaluate the soundness of the structure from quantity of displacement of the structure temporarily and instantly. A planned building for experiments was decided, and the development of the program calculated the quantity of displacement from accelerometer data.
In development of method of detailed damage evaluation of the structure by system identification method, the method was established to diagnose the detailed soundness from the acceleration data of the structure in the emergency state. It was revealed that resolution of the accelerometer was required to be 10 times more than the first estimated target, to identify a natural frequency of structure from continuous microtremor data. In the development of system identification method, the precision was estimated by using the subspace method.
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