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    • 5. 发明申请
    • Nondestructive inspection apparatus
    • 无损检测仪器
    • US20080144927A1
    • 2008-06-19
    • US12000590
    • 2007-12-14
    • Yoshihito HashimotoHidekazu Himezawa
    • Yoshihito HashimotoHidekazu Himezawa
    • G06K9/62
    • G01N29/045G01N29/4481G01N2291/022G01N2291/023G01N2291/0289
    • A nondestructive inspection apparatus includes a sensor unit for detecting vibrations transmitted through a test object from a vibration generator and a signal input unit for extracting a target signal from an electric signal outputted from the sensor unit. An amount of characteristics extracting unit is also included for extracting multiple frequency components from the test signal as an amount of characteristics. Further, a decision unit has a competitive learning neural network for determining whether the amount of the characteristics belongs to a category, wherein the competitive learning neural network has been trained by using training samples belong to the category representing an internal state of the test object, wherein distributions of membership degrees of the training samples are set in the decision unit.
    • 非破坏性检查装置包括:传感器单元,用于检测从振动发生器传递的测试对象的振动;以及信号输入单元,用于从传感器单元输出的电信号中提取目标信号。 特征提取单元的数量还包括用于从测试信号中提取多个频率分量作为特征量。 此外,决策单元具有用于确定特征量是否属于类别的竞争性学习神经网络,其中已经通过使用属于表示测试对象的内部状态的类别的训练样本来训练竞争性学习神经网络, 其中在所述决策单元中设置所述训练样本的隶属度分布。