Piezoelectric ceramic sensitive module and hydraulic concrete structure health monitoring test platform

Abstract

The invention discloses a hydraulic concrete structure health monitoring test platform based on a piezoelectric ceramic sensitive module. The test platform is characterized by comprising a signal generation device (1), a signal acquisition device (2), a driver (3), a sensor (4), a digital filter (5), and a control computer platform (6) equipped with MATLAB / Simulink, wherein signals sent out by the signal generation device (1) enter the control computer platform (6) equipped with MATLAB / Simulink after passing through the driver (3), the sensor (4), the digital filter (5) and the signal acquisition device (2) in sequence. The reliable test platform is provided for a series of research on problems of strength, structure damage, natural vibration frequency identification and the like of hydraulic concrete. With the assistance of the platform, a hydraulic concrete health monitoring system based on the piezoelectric ceramic sensitive module can be comprehensively established, and an essential test device and an essential test method are provided for application of the piezoelectric ceramic sensitive module to dam safety monitoring.

Description

technical field [0001] The invention relates to a test platform for monitoring the health of concrete structures in water conservancy and civil engineering, in particular to a monitoring platform for the health of hydraulic concrete structures based on piezoelectric ceramic smart modules. Background technique [0002] The safety of water retaining structures in water conservancy projects will have a great impact on the development of the national economy and people's lives. Once an accident occurs, it will have a devastating impact on downstream industrial facilities, farmland and rural urban residents; In addition to the huge water pressure upstream, it also bears damages such as concrete shrinkage damage, aging, corrosion, sudden climate change, and earthquakes. [0003] Due to the large volume of hydraulic structures, microscopic vibration control has no practical significance, but macroscopic vibration is of great significance. When a large earthquake occurs at the dam s...

AI Technical Summary

Problems solved by technology

However, hydraulic concrete structures are often large in size, complex in construction, and long in service, while piezoelectric ceramic sheets are brittle and sensitive to the external environment. damage; the vibration control and health diagnosis of civil engineering structures only involve the monitoring of small-volume concrete and reinforced concrete structures, and the monitoring of large-volume concrete and plain concrete is still relatively lacking; piezoelectric sensors have been made The sensor, which is expensive and does not combine the specific characteristics of civil engineering structures, especially hydraulic structural engineering, will inevitably cause inconvenience in practical engineering applications; the specific shape of piezoelectric sensitive modules or piezoelectric smart aggregates, in the past The research did not give specific theoretical guidance; previous researchers did not mention the structural health monitoring of simple plain concrete structures under dynamic loads.

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