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本文从超声检测原理出发 ,针对超声检测中近场区内缺陷难以准确定量的问题 ,利用计算机数字信号处理技术 ,通过对不同换能器进行频谱分析 ,计算各换能器声轴线上声压分布曲线 ,并进行对比实验 ,探讨了超声检测中声轴线上声压分布的一般规律。为提高超声检测的可靠性 ,并最终解决上述问题提供了理论和实验依据
In this paper, starting from the principle of ultrasonic testing, aiming at the problem that it is difficult to accurately quantify the defects in the near-field region in ultrasonic testing, the sound pressure distribution on the acoustic axis of each transducer is calculated through the spectrum analysis of different transducers by using computer digital signal processing technology Curves, and comparative experiments were carried out to discuss the general rules of sound pressure distribution on the acoustic axis in ultrasonic testing. In order to improve the reliability of ultrasonic testing, and ultimately solve the above problems provide a theoretical and experimental basis