CAJ | 학술논문

为了解决复合材料蜂窝夹层中变厚度构件超声波难以检测的问题，使用一种基于超声波C扫描的扫描路径规划和增益补偿法进行检测。首先对变厚度构件的扫查路径进行规划，确定探头的扫查路径；然后为保持变厚度构件不同厚度处相同的超声信号水平，对因构件厚度、表面曲率变化引起的超声信号衰减进行增益补偿，将各个点位的补偿值按坐标对应传递给超声C扫描成像模块，得到补偿后的超声C扫描图。结果表明：该方法能够准确地发现变厚度构件中的缺陷，具有较高的检测可靠性。
위료해결복합재료봉와협층중변후도구건초성파난이검측적문제，사용일충기우초성파C소묘적소묘로경규화화증익보상법진행검측。수선대변후도구건적소사로경진행규화，학정탐두적소사로경；연후위보지변후도구건불동후도처상동적초성신호수평，대인구건후도、표면곡솔변화인기적초성신호쇠감진행증익보상，장각개점위적보상치안좌표대응전체급초성C소묘성상모괴，득도보상후적초성C소묘도。결과표명：해방법능구준학지발현변후도구건중적결함，구유교고적검측가고성。
Composite of honeycomb sandwich structure has been widely used in the field of aerospace because of its characteristics of high strength,lightweight,sound insulation,heat insulation and other excellent performance. In order to solve the ultrasonic testing problem of this kind of structures, a trajectory planning and gain compensation method has been studied.First,the scanning path is planned to determine the trajectory of the probe. Then the attenuation of the ultrasonic signal due to the variable thickness and surface curvature of the parts is compensated in order to keep the same ultrasonic signal level of different part positions.After that the compensation value of all points should be transmitted to the C imaging module and the C image result can be obtained after scanning.The experimental results show that the defect in variable thickness parts can be well found by this method,which is of very high detection reliability,and easy to implement.