成果報告書詳細
管理番号20150000000620
タイトル*平成26年度中間年報 SIP(戦略的イノベーション創造プログラム) インフラ維持管理・更新・マネジメント技術 インフラの多種多様なセンシングデータを処理・蓄積・解析する技術の開発 インフラセンシングデータの統合的データマネジメント基盤の研究開発
公開日2015/8/4
報告書年度2014 - 2014
委託先名大学共同利用機関法人情報・システム研究機構国立情報学研究所 国立大学法人北海道大学 国立大学法人筑波技術大学
プロジェクト番号P14031
部署名電子・材料・ナノテクノロジー部
和文要約
英文要約Title: Integrated Data Management Platform for Civil Infrastructure Sensing(FY2016-2019) FY2016 Annual Report
1.1 Sensing Database System
For managing various sensing database, we first designed an index based on a succinct data structure that compresses sensing data with high compression rate and provides an efficient retrieval function. In this index, the range of sensing data values is recursively split into sub-ranges and represented by a sequence of bits to obtain highly compressed data. Second, we developed an outlier detection method for the sensor data. To detect outliers, an ordinary data pattern is obtained observing incoming data and then the divergence is calculated comparing the incoming data from the ordinary pattern. Third, we analyzed video data that monitored car traffic over a bridge and studied a method to recognize each car on the bridge by comparing the image features with and without cars.
1.2 Visual Analytics System
To analyze data streams from mutually synchronized sensors using Chip-Scale Atomic Clocks (CSACs), an exploratory visual analytics system was developed based on a coordinated multiple views. It allows users to: (1) designate sensors to monitor its real time data stream as well as its retrospective data acquired via the sensor, (2) pick out any pair of neighboring 3D accelerometers to calculate the difference vector that is approximately proportional to the stress applied to one of these points, (3) visualize the temporal change of its projection to the bridge face in polar representation, and (4) flexibly zoom in or zoom out target data streams to analyze. Its modular architecture allows users to easily bring in any other visualization and analysis tools and to make them coordinate with others.
1.3 High-precision Time Synchronization Multi-Sensing Technology
A CSAC was applied as a key component enabling an integrated analysis of various sensor data under high-precision time synchronization. The designed and manufactured sensing module prototype consists of a main board, a sensor board, and a wireless communication board. The main board is equipped with a CPU, a CSAC, a FPGA and input and output terminals. FPGA has been developed to impart a highly accurate time stamp of the CSAC to the measurement data from various sensors. The sensor board and the wireless communication board have detachable configurations. Two types of sensor board were developed. One is an acceleration sensor with a 16bit A/D converter and the other is a multi-sensor with a 24bit A/D converter. Two types of Wi-Fi and 3G wireless communication boards were developed. According to the time synchronization performance test results, it was confirmed that the developed modules could achieve time synchronization in the range of ± 0.001 second.
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