水下混凝土缺陷冲击回波法检测装置研发与试验验证

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中图分类号：TV22 文献标识码：A 文章编号：1001-9235（2025）08-0108-09

Development and Experimental Verification of Underwater Concrete Defect Detection Device Using Impact Echo Method

WANFal²，LI Haifeng ，HUANGWeiping， ZHANG Liang （1.PearlRiverHydraulicResearch Institute，Guangzhu5O611，China;2.KeyLaboratoryof WaterSecurityGuaranteein Guangdong Hong Kong-MarcoGreater BayArea ofMinistryof Water Resources，Guangzhou510611，China;3.Sichuan ShengtuoTesting Technology Co.，Ltd， Zigong 643030， China）

Abstract：Toadressthechallngesofondestructivetestingofunderwaterconcetestructures，aninovativeunderwateripacto detectiondeviceisintroducedanditsperformanceisevaluatedthroughexperimentsonindorunderwaterconcretesampleswith defects.Intheprocessofdevicedevelopment，thisstudycompareselectricexcitationandpneumaticexcitationandexplorsthe applicabilityoftheICPaccelerometerandthehydrophoneinunderwaterimpactechoconcretetesting.According totheresults， ① the combinationofelectricexcitationandICPacelerometersenablesthepreciseidentificationofdefectareas，depths，andthesample's thickness; ② electric excitation demonstrates superior signal stabilityand consistencyover pneumatic excitation，while the latter potentially leads to signal distortion; ③ hydrophones can identify the defect areas，but provide insufficient precision for determining theirdepth.Ascientificfoundationandtechnicalsupportareprovidedforunderwaterconcretedefectdetection，andareferenceis offered for related engineering practice.

Keywords： underwater impact echo; concrete defects; non-destructive testing; excitation source; sensor

混凝工作为一种）泛应用的工性材科，其内部缺陷的检测对于确保结构安全和延长使用寿命至关重要。（剩余9205字）