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Features:
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In a recent development, Dacheng Construction Group of Japan, in collaboration with Yokogawa, Nagano Japan Wireless Co., Ltd., and the University of Tokyo, has introduced an advanced building structure monitoring system. This innovative system utilizes high-precision MEMS (Micro Electro Mechanical Systems) sensors along with wireless technology operating in the 920 MHz band, enabling long-term and accurate monitoring of structural stability.
The system is part of a project commissioned by NEDO (Japan New Energy and Industrial Technology Development Organization), focusing on infrastructure maintenance and renewal. The collaboration brings together industry leaders, academic institutions, and government agencies to address the growing challenge of aging infrastructure. Yokogawa provides the MEMS sensors, while Nagano Japan Wireless offers reliable wireless communication solutions. Dacheng Construction Group and the University of Tokyo are responsible for assessing the structural integrity of buildings.
The newly developed MEMS sensors offer exceptional precision: the vibration sensor can detect changes as small as 1 mgal (with 1 gal equal to 1 cm/s²), and the strain sensor can measure deformations down to 1 nm. These sensors have a longer maintenance cycle compared to traditional models, allowing for continuous and accurate monitoring of even the slightest structural changes over time.
Data collected from the sensors is transmitted via the 920 MHz frequency band, which is less affected by internal building structures like walls and ceilings. The data is then gathered by a receiving device installed on each floor and sent to a diagnostic computer, significantly reducing the need for complex wiring. Additionally, efforts are underway to develop an independent power supply unit for areas where electricity is unavailable.
Once the data reaches the diagnostic PC, it is analyzed using the "T-iAlert Structure" system. This software evaluates key parameters such as natural frequency, distortion, and tilt angle, providing real-time insights into the building's condition. In the event of an earthquake of magnitude 3 or higher, the system triggers a detailed vibration analysis. If any anomalies are detected, it can also identify potential secondary damage points.
Dacheng Construction Group plans to test the system in existing buildings and civil engineering structures starting in 2018. Based on the results, they aim to develop comprehensive Business Continuity Plans (BCP). By April 2019, the company hopes to fully implement the system nationwide, marking a significant step forward in ensuring the safety and longevity of Japan’s critical infrastructure.
September 27, 2025