Concrete structure tomographic imaging detection system

Abstract

The disclosed concrete structure chromatography imaging detection system comprises: a CPU connected by PCI bus, an A / D card, a signal processing card connected with the A / D card and an emission power,and receiving transducer array connected with an ultra-magnetostrictive rare-earth emission transducer. This invention is simple and well precise, and can real-time show the inner structure of concrete accurately.

Description

technical field [0001] The invention belongs to the concrete structure detection technology, in particular to the concrete structure ultrasonic CT tomography detection technology. Background technique [0002] Concrete structure is one of the important components of bridges, tunnels, and industrial and civil buildings, and its internal characteristic detection is of great significance for engineering quality evaluation and safety evaluation. The traditional detection method of concrete structure is to do destructive strength test on the cube specimen made by sampling. Practice shows that the performance index of concrete structure measured by specimen test is often quite different from the performance of the actual concrete structure in the structure. Therefore, the on-site detection technology that directly detects the performance of concrete structures has become an important means of quality management of concrete engineering. [0003] On-site inspection includes two me...

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Problems solved by technology

[0008] 1) The ultrasonic emission source is made of piezoelectric ceramic materials, and the emission power is small. In the detection of large-volume concrete structures, the signal-to-noise ratio of the received signal is poor, so the detection effect will be seriously degraded;

[0009] 2) The frequency band of the piezoelectric ceramic ultrasonic emission source is narrow, so when the pulse signal is transmitted, the aftershock tail is long (generally more than 5 oscillation cycles), and in the application of thickness measurement, the tail interferes with the reflected wave, which makes the detection severely limited performance

[0010] 3) Using single-channel one-dimensional signal acquisition and analysis, the associated information of adjacent detection points is not effectively utilized

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