基于低频超声导波技术的高速公路护栏立柱埋深检测的试验研究  

Experiment and Study on Embedded Depth Measurement of Expressway Guardrail Posts Based on Low Frequency Ultrasonic Guided Wave Technique

作　　者：王泽林[1] 张慧昕[1] 胡富翔[2] 吴斌[2] 韦征[1] 

机构地区：[1]浙江省交通厅工程质量监督局,杭州市311215 [2]北京工业大学机电学院,北京市100124

出　　处：《公路》2010年第9期227-231,共5页Highway

摘　　要：超声导波技术可以用于高速公路护栏立柱埋地深度的准确快速的检测。研究了自由立柱和部分埋地护栏立柱中低频纵向超声导波的传播特性,并选取了30-60 kHz的L（0,1）模态对自由立柱和部分埋地立柱进行了检测试验,试验结果表明低频纵向超声导波可以有效地测量出高速公路护栏立柱的埋地深度,检测的最大相对误差在5%以内,完全满足工程检测需要。Ultrasonic guided wave inspection can be used for the measurement of embedding depth of expressway guardrail posts quickly and accurately.In this paper,propagation of low frequency ultrasonic longitudinal guided waves in free and partly embedded guardrail posts is investigated and L（0,1） mode in the frequency range of 30~60 kHz is selected for inspecting the free and partly embedded guardrail posts.The experimental results show that low frequency ultrasonic longitudinal guided waves can achieve the measurement of embedded depth of expressway guardrail posts effectively.The maximal relative error is less than 5%.This method can meet the needs of engineering measurement.

关 键 词：护栏立柱 低频 超声导波 模态 埋置深度 

分 类 号：U491.59[交通运输工程—交通运输规划与管理]