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成果報告書詳細
管理番号20170000000619
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 道路インフラ状態モニタリング用センサシステムの研究開発
公開日2017/8/1
報告書年度2016 - 2016
委託先名技術研究組合NMEMS技術研究機構
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 Sensing System for Road Infrastructure Monitoring System (FY2014-FY2018) FY2016Annual Report

The results of research and development of sensing system for road infrastructure in FY2016 are summarized as follows:
(1-1-1) Development of bridge sensing system utilizing super acoustic sensor
 SA sensors with sensitivity of more than -90dB(re 1V/ーbar) in band 10kHz - 1MHz were developed. The sensor terminal of package size (100x70x40mm) downsized than the aim was also developed. Furthermore, the relations between elastic wave parameters and the damage were clarified and damage evaluation method was proposed.
(1-1-2) Development of bridge sensing system utilizing flexible 2D-strain-pattern sensor sheet
 Fabrication process of ultrathin silicon strain sensor array was established and the mass production of 5*5 sensor array sheet for proof examinations was started. The life time of flexible sensor sheet was 171 years which was enough to ten-year life time in outdoor environment.
(1-2) Development of inclination sensing system of road ancillary structure
 MEMS sensor devices of ±0.6gal in output stability and of less than 0.1gal in resolution of vibration measurement were developed. It was confirmed that tilt-multi-sensor terminals can communicate with a concentrator and aim specifications were proper by precedent field examinations.
(1-3) Development of the slope displacement sensing system
 The connection between sensor terminal with highly durable package and outside clinometer was confirmed. The possibility that was detectable in displacement more than 4mm an hour of the aim was obtained by the increase of sub receiver through field experiments.
(2-1) Development of common platform for the wireless communication network
 It was confirmed that each sensor terminal could communicate with concentrator in real outside field by reviewed communication specifications. A function to confirm the prevention of unjust manipulation was implemented.
(2-2) Development of the high durable packaging technology
 LTCC board with built-in high efficiency antennas and a translucency ceramic substrate were developed and were provided to each sensor system. The durability of longer than ten years was confirmed by package acceleration durability examinations after package sealing in a high airtight sealing technique.
(3) Verification and evaluation study on sensing system for road infrastructure monitoring
One demonstration place suitable for each sensing system was selected. An investigation of bridge monitoring in UK and the Netherland and a risk investigation of road slopes managed by local government were carried out.
(4) Research and development of chip scale atomic clock for sensor terminal
A gas cell produced by glass work processing was realized, having an outer shape of 2.0 mm square. The performance in terms of the frequency stability, 5x10-12, was confirmed with an integration time of 400,000 hours, which corresponds to holding 10 ms for 389 days. A CSAC prototype device with less than 120 mW power consumption and time synchronization modules were developed.
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