PSD (power spectral density) algorithm-based low-power-consumption real-time vibration monitoring system and method

Abstract

The invention discloses a PSD (power spectral density) algorithm-based low-power-consumption real-time vibration monitoring system applied to health monitoring of a major infrastructure construction structure. The system comprises a sensing acquisition module, a data processing module, a data communication module and a power supply module. The system works at a key point of the infrastructure construction structure, wherein the sensing acquisition module acquires the vibration information of the key point of the structure and obtains three-dimensional vibration acceleration data of the key point of the structure; after the data processing module performs certain pre-processing on the acquired data, the pre-processed data are transmitted to gateway equipment through the data communication module, so that structural vibration data are provided for the health monitoring of the infrastructure construction structure. According to the system and the method, through PSD algorithm transplant and a low noise design, the energy consumption of the system is reduced, the service life of the system is prolonged, the anti-jamming capability of the system is improved, and the method and the system can adapt to complex and demanding monitoring environments.

Description

technical field [0001] The invention relates to emergency monitoring and early warning control technology for the safety state of infrastructure structures, in particular to a low-power real-time vibration monitoring system applied to the health monitoring of major infrastructure structures. Background technique [0002] Bridges, tunnels and other major infrastructures will continue to degrade due to the aging of materials during the operation period, resulting in a continuous decrease in their safety; at the same time, various natural disasters (typhoons, floods, earthquakes), man-made disasters (traffic Accidents, terrorist activities) and continuous traffic loads will also cause various types of damage to infrastructure structures, which may cause sudden collapse accidents of infrastructure, endanger public safety, and cause loss of life and property of the country and people. In addition, in the process of maintaining infrastructure, due to the lack of real-time data inf...

AI Technical Summary

Problems solved by technology

However, the currently implemented vibration monitoring devices for infrastructure structure monitoring systems have a series of limitations. First, the anti-interference ability is poor, and infrastructure structure health monitoring systems usually operate in complex external environments. Under the influence of factors, the beam structure health monitoring system is always disturbed by noise, and a large amount of state information of the structure is submerged in the noise, resulting in a low damage recognition rate, making it impossible to accurately identify structural damage directly through sampling signals; Energy limited, short system life

For the monitoring of the state of infrastructure structures, a huge amount of data often needs to be collected. During data processing and transmission, energy consumption is very high. However, limited by the structural health monitoring environment, many vibration monitoring systems often require battery power. During the operation of the facility, it is very inconvenient to replace the battery of the structural health monitoring system, which greatly shortens the working life of the equipment; third, real-time monitoring cannot be achieved

Limited by energy consumption and equipment operation stability, the vibration monitoring system currently used in the field of infrastructure structural health monitoring cannot achieve real-time monitoring of structural status

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