Space-time four-dimensional wideband array-based high speed steel rail ultrasonic detection imaging method and apparatus thereof

Abstract

The invention discloses a space-time four-dimensional wideband array-based high speed steel rail ultrasonic detection imaging apparatus. The apparatus comprises a detection front end and a background processor, and the detection front end and the background processor are wirelessly connected. An emission probe array in the detection front end expands to a three dimensional array from a traditional two dimensional probe array, and the emission probe is formed by laminating a wideband large-power ultrasonic energy transducer and a three dimensional funnel-shaped power focusing device, and realizes large power and small-caliber emission, so the contradiction between the emission power and the emission caliber is solved. The ultrasonic energy transducer is made through splicing multiple-frequency range strip-shaped ultrasonic energy transducers, and can flexibly generate a required wideband emission signal. The height and the inclination degree of the power focusing device are adjusted as needed to make a limited space accommodate many probes for forming a probe array in order to improve the detection precision. The apparatus and the method can improve the detection precision in many respects, and meets high speed steel rail detection demands.

Description

technical field [0001] The invention relates to ultrasonic detection technology, in particular to high-speed non-destructive ultrasonic detection technology for rail flaw detection, and in particular to a high-speed rail ultrasonic detection imaging device and method based on a space-time four-dimensional broadband array. Background technique [0002] As an important national infrastructure and the main artery of the national economy, the railway's development and modernization process are related to the realization of my country's economic and social development and modernization goals. Due to the complex condition of my country's railway lines and the large number of overdue rails, the overloaded operation makes the damage rate of railway rails extremely high, which directly endangers the safety of transportation and driving. In order to ensure the safety of railway operation, according to my country's rail flaw detection operation standards, it is necessary to regularly o...

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Problems solved by technology

[0010] The purpose of the present invention is to overcome the contradiction between the probe transmission power and the probe diameter of the existing wheeled flaw detection vehicle, and the problem of narrow transmission signal bandwidth when using frequency modulation technology, and propose a high-speed rail ultrasonic detection imaging based on a space-time four-dimensional broadband array device

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