机器人辅助激光超声检测系统的设计与实现
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教育部“创新团队发展计划”光电信息与仪器基金资助项目(IRT_16R07);北京市教委科技发展计划基金资助项目(KM201511232021);北京市教委创新能力提升计划基金资助项目(TJSHG201510772016);国家自然科学基金资助项目(U1430120)

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Design and Implementation of Laser Ultrasonic Testing System Based on Articulated Robot Technology
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    摘要:

    为解决飞行器复合材料结构的非接触、高精度无损检测问题,提出一种基于关节型机器人的激光超声检测系统。在系统设计上,利用波长1 064 nm的Nd:YAG脉冲激光器激励超声波,基于光折变效应的双波混合干涉测量系统探测超声信号,激励和探测激光全部由光纤传导至光束聚焦端口投射到被测物表面,采用精密六轴关节型机器人作为扫描执行机构进行C型扫描检测。建立了系统的实验室原型,实现了碳/环氧复合材料试样的激光超声C扫描检测,得到试样内部模拟缺陷的分布、形状和尺寸特征,验证了系统的有效性。研究结果表明,研制的机器人辅助激光超声检测系统可以实现碳/环氧复合材料内部直径1 mm以上分层的检测,在飞行器复合材料构件的无损检测方面具有应用前景。

    Abstract:

    In order to solve the problem of the noncontact and high precision nondestructive testing for the aircraft composites, a laser ultrasonic testing system based on articulated robot is proposed in this paper. In the design of the system, a 1 064 nm Nd:YAG pulse laser is used to excite the ultrasonic wave, and a laser interferometer based on photorefractive effect is used to measure the ultrasonic signals. The exciting and detecting laser are transmitted through the optical fiber to the focusing module and then projected on the surface of the detected object. A precise sixaxis articulated robot is used as the scanning mechanism for Cscan imaging. The laboratory prototype of the system is built. The laser ultrasonic Cscan testing of the carbon/epoxy composite specimen is realized, and the distribution, shape and size features of the simulated internal defects are characterized. The effectiveness of the system is verified. The results show that the robot assistant laser ultrasonic testing system is capable of detecting the internal delamination with a diameter larger than 1 mm in carbon/epoxy composite materials, thus the system has a broad application prospect in the nondestructive testing of aircraft composite structures.

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孙广开, 曲道明, 周正干.机器人辅助激光超声检测系统的设计与实现[J].压电与声光,2017,39(5):780-783. SUN Guangkai, QU Daoming, ZHOU Zhenggan. Design and Implementation of Laser Ultrasonic Testing System Based on Articulated Robot Technology[J]. PIEZOELECTRICS AND ACOUSTOOPTICS

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  • 在线发布日期: 2017-10-10
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