Wireless sensor suitable for health monitoring of concrete structure

Abstract

The invention relates to a wireless sensor suitable for health monitoring of a concrete structure. The wireless communication comprises a communication antenna, an energy extracting antenna, a variable matching network, a demodulator, a backscattering modulator, a controller, a physical energy extracting module, a memory and a sensor. The wireless sensor has the characteristics that the whole circuit is supplied with electric energy by the energy extracting antenna and the physical energy extracting type, a built-in power source is not needed, the difficulty in failure to replace the battery in the later period is avoided, and the manufacturing cost and later maintenance cost are greatly reduced; the variable matching network can complete the power matching at different input signal frequency according to the digital signal adjusting center frequency obtained by a frequency digital converter, so as to improve the reliability of the wireless sensor in working under the complicated concrete environment; the backscattering modulator is based on the radar backscattering principle, the zero-power consumption modulation is realized, and the circuit structure is simple.

Description

technical field [0001] The invention relates to a wireless sensor suitable for health monitoring of concrete structures, belonging to the technical field of civil structures. Background technique [0002] With the continuous development of my country's economy, various large and complex engineering structures emerge in an endless stream, and these construction engineering structures occupy an important position in national production and life. One of the most widely used building materials in civil engineering structures today is concrete, so the health monitoring of concrete structures is particularly important. Most of the existing concrete detection methods use non-destructive detection methods that do not damage the internal structure and performance of concrete, but these methods cannot directly measure the required physical quantities, and the real-time performance is poor. It is necessary to implement the closure, which brings great inconvenience to the production an...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a wireless sensor suitable for concrete structure health monitoring in order to solve the problems existing in the existing concrete structure health monitoring

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