CAJ | 학술논문

通过对预制混凝土模型进行超声波成像观测，研究了平面换能器与径向换能器的波场特性。结果表明：随着观测倾角的增大，无论是平面换能器还是径向换能器，超声波传播速度变化都不大，但波幅变化较大。径向换能器所测波幅单调缓慢减小，平面换能器所测波幅减小较快，且存在突变点。对两者观测数据又进行了衰减成像计算，结果是径向换能器所测数据成像效果较好，平面换能器所测数据成像误差较大。
통과대예제혼응토모형진행초성파성상관측，연구료평면환능기여경향환능기적파장특성。결과표명：수착관측경각적증대，무론시평면환능기환시경향환능기，초성파전파속도변화도불대，단파폭변화교대。경향환능기소측파폭단조완만감소，평면환능기소측파폭감소교쾌，차존재돌변점。대량자관측수거우진행료쇠감성상계산，결과시경향환능기소측수거성상효과교호，평면환능기소측수거성상오차교대。
Based on observing data of the ultrasonic tomography in concrete models , the wave field characteristics of the planar transducer and radial transducer have been studied .The test results reveal that with the increasing of observing dip ,no matter it is planar transducer or radial transducer ,the speeds change very little , but the amplitudes change greater . The amplitude produced by radial transducer decreases gradually ,while the amplitude produced by planar transducer decreases fast and has sudden change at some points .Through calculating attenuation tomography with observing data of both transducers ,the results show that the image of radial transducer has higher accuracy ,but the image of planar transducer has greater error .