Device and method for detecting large-scale reproducible concrete cavity of steel pipe

Abstract

The invention discloses a device for detecting a large-scale reproducible concrete cavity of a steel pipe. The device comprises a sensor array, a random waveform function generator, a power amplifier, a data acquisition instrument and a data analysis system which are arranged in a large-scale reproducible concrete component of the steel pipe, wherein the sensor array comprises a driving sensor and a receiving sensor; the random waveform function generator is used for sending a preset waveform function; a sending signal is amplified by the power amplifier and then is sent to the driving sensor; the signal passes through a large-scale reproducible concrete medium of the steel pipe and then is received by the receiving sensor; a data acquisition instrument is used for acquiring the signal response after receiving; and the signal response is lastly sent to the data analysis system for analyzing the signal characteristics. The invention also discloses a detection method for the large-scale reproducible concrete cavity of the steel pipe. The device provided by the invention is time-saving and labor-saving, can be used for accurately detecting the size and position of the inner cavity of a large-scale concrete component and is beneficial to the application and popularization for the large-scale reproducible concrete structural form of the steel pipe.

Description

technical field [0001] The invention relates to a cavity detection device and method based on stress field inversion, in particular to a device and method for detecting internal cavity conditions of large-scale renewable concrete in steel pipes. Background technique [0002] With the continuous demolition of a large number of old buildings, more and more construction waste urgently needs to be treated, and half of the total construction waste is waste concrete, and large-scale recycled concrete made of steel pipes is an important way to reuse waste concrete. [0003] In engineering applications, there may be voids in the pouring process of large-scale renewable concrete with steel pipes, which will affect the mechanical performance of its structure. At present, the main method for void detection of large-scale concrete components is ultrasonic testing. Among them, the ultrasonic counter-measurement method is usually used for the detection of voids in the concrete-filled ste...

AI Technical Summary

Problems solved by technology

Among them, the ultrasonic counter-measurement method is usually used for the detection of voids in the concrete-filled steel pipe wall. Due to the influence of the refraction and reflection of the pipe wall, the detection of internal voids cannot be carried out.

If the ultrasonic acoustic tube detection method is used, it is usually necessary to arrange acoustic tubes inside the steel pipe concrete, which affects the structural performance, and the detection is time-consuming and laborious

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