【摘要】 为解决红外无损检测缺陷定量识别困难的问题,提出了一种粒子群算法(PSO)优化反向传播(BP)神经网络的缺陷定量识别方法。以最佳检测时间与最大温差为模型的输入,孔洞缺陷的深度与直径大小为模型的输出,建立粒子群优化的BP神经网络缺陷定量识别模型。使用ANSYS软件对带有平底孔洞缺陷的金属平板进行脉冲热分析,提取金属平板检测表面的最大温差与最佳检测时间,作为神经网络模型训练与检验的数据样本,使用神经网络进行预测。计算结果表明:预测值的最大误差为5.5%,最小误差为1%,证明了粒子群优化BP神经网络方法进行红外无损检测定量识别的可行性。更多还原

【Abstract】 In order to solve the problem of quantitative recognition of defects in infrared nondestructive testing, a particle swarm optimization(PSO) algorithm for quantitative defect recognition with back propagation(BP) neural network was proposed. With the input of the optimal detection time and maximum temperature difference, the depth and diameter of hole defects were the output of the model, and the BP neural network defect identification model of particle swarm optimization was established. ANSYS was used to analyze the metal plate with flat bottom hole defects by pulse thermal analysis. The maximum temperature difference and the best detection time were extracted from the surface of the metal plate. The neural network model was used to train, test and predict the data. Results showed that the maximum error of neural network prediction was 5.5%, and the minimum error was 1%. The feasibility of PSO-BP neural network for quantitative identification of infrared nondestructive testing was proved.更多还原