基于多幅连续相关法的超声检测信号的缺陷识别技术

详细信息

Defect Recognition of Ultrasonic Testing Signals Based on Multi-Frame Correlation

摘要: 相关法是时域中描述信号相似性特征的一种常用分析方法。文章基于数字相关法，针对超声检测中的大量检测回波信号，提出了一种多幅连续相关的处理方法，以实现超声检测信号的缺陷追踪与识别，并在实际检测试验中采用该方法对A型扫查的大量超声自动化检测信号进行处理，不仅有效地排除了随机干扰，同时保留了缺陷信号的完整信息，缺陷识别稳定、快速，识别准确率可达90%以上。
- 超声检测 /
- 相关法 /
- 缺陷识别
Abstract: Correlation is a useful method to describe the similarity between signals in time domain. Based on digital correlation, a new method of multi-frame correlation is introduced to process large amount of inspection signals and complete defect recognition in the experiment of ultrasonic testing, and in this process, the multi-frame correlation method not only eliminates the random disturbing signals, but also acquires a high correct rate beyond 90% of defect recognition.
- Ultrasonic testing /
- Correlation /
- Defect recognition

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