玻璃纤维结构风电叶片的超声相控阵检测方法研究

随着中国风电行业的兴起和逐渐成熟,对风电系统本身的质量要求也越来越高,尤其是叶片检测越来越受到各个叶片制造企业的关注。但常用的敲击手段、光照手段等已经无法满足更高的质量要求,即使是使用常规超声技术,由于探头尺寸的限制,无法实现大面积的快速扫查,且数据判读和缺陷检出率受人为因素影响较大。基于上述原因,介绍了一种利用超声相控阵技术,并结合专用的风电叶片检测探头对风电叶片进行检测的方法。通过近3年的实验,证明了使用超声相控阵技术可以快速准确地检测风电叶片内部缺陷,包括玻璃纤维外壳内部的分层和干丝缺陷,以及玻璃纤维外壳和内部支撑结构之间的脱粘缺陷,并基本掌握了风电叶片的检测方法和要点。其优势包括直观C扫描成像、检测效率高、易于存储记录等诸多优点,因而在风电制造行业有着广泛地应用前景。

Ultrasonic Phased Array Inspection Method Research for GFRP Wind Blade

Because of the developing and maturing of wind power industry, the requirement of the quality control for wind power system is higher and higher. Especially the wind blade inspection is taking more care by the manufacturers, the normal knocking method and lighting method cannot meet the higher quality requirements, and even the conventional UT is limited by the size of the probe, so it cannot make the large area fast inspection, and also the data analysis and detectable ratio is influenced by person. This paper is about using ultrasonic phased array technology and customized phased array probe for wind blade inspection. After 3 years experiments, phased array technology is approved that can be used to find the defects inside the wind blade, including de--lamination and dry fiber defects in GFRP skin, and de--bonding between GFRP skin and internal support structure, and we got the skill of wind blade inspection and key point. Comparing with conventional UT, phased array technology has many advantages, inc view of C--scan image, highly productivity, easily data storage, etc. so phased array techno uding directly ogy has widely application prospect for wind blade manufacturing industry.