Ultra-low power consumption passive structure health monitoring system and method

Abstract

The invention discloses an ultra-low power consumption passive structure health monitoring system and method. The system includes a plurality of passive structure health detection nodes, an RFID reader, a wireless router and a control center; the passive structure health detection nodes measure structure health parameters when the RFID reader sends out a specific instruction and return the structure health parameters to the RFID reader, the RFID reader and the control center are connected to the same local area network through the wireless router, and the control center can remotely access the RFID reader and read sensing information from the plurality of passive structure health detection nodes; and the control center receives stress information, temperature information and speed information inside a monitored structure in real time, analyzes and displays the structure health condition. The system provided by the invention can monitor stress information inside the monitored structure and a change trend in real time and can provide early warning for occurrence of a building disaster, the system is convenient to deploy and collect information, and does not need later maintenance, and is of great significance to structure health evaluation of a long-span bridge, a high-rise structure, an expressway or ocean platform and the like.

Description

Technical field [0001] The invention relates to structural health monitoring technology, in particular to a passive structural health monitoring system based on radio frequency energy acquisition wireless sensor network. Background technique [0002] With the development of my country’s economy and the acceleration of urbanization, various major civil engineering structures such as high-rise buildings, long-span bridges, and highways have increased day by day. The health of these major structures has aroused people’s attention when suffering from natural or man-made disasters. Health status assessment, real-time monitoring and forecasting of structural performance and safety status are of great significance to the protection of people’s lives and property, and structural health monitoring technology has also become a hot issue in domestic and foreign research. In recent years, structural health monitoring technology has introduced some advanced sensing technologies, such as fiber ...

AI Technical Summary

Problems solved by technology

[0004] Although GPS displacement monitoring technology has made some progress in the field of structural health monitoring, the quality of GPS measurement depends on factors such as satellite visibility distance, signal transmission quality, and communication delay. At the same time, it is necessary to consider the multipath effect of satellite signals when used between cities. The accuracy is not very ideal, these factors limit the application of GPS displacement monitoring technology in the field of structural health monitoring

[0005] The structural health monitoring system based on the traditional wireless sensor network has the characteristics of wide coverage and high measurement accuracy, but the nodes are large in size and have limited battery life. It is very inconvenient to maintain the nodes later.

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