Non-destructive testing method and apparatus utilizing phase
multiplication holography
    2.
    发明授权
    Non-destructive testing method and apparatus utilizing phase multiplication holography 失效
    无损检测方法和利用相位全息术的装置

    公开(公告)号:US4476434A

    公开(公告)日:1984-10-09

    申请号:US342431

    申请日:1982-01-25

    摘要: An apparatus and method for imaging of structural characteristics in test objects using radiation amenable to coherent signal processing methods. Frequency and phase multiplication of received flaw signals is used to simulate a test wavelength at least one to two orders of magnitude smaller than the actual wavelength. The apparent reduction in wavelength between the illumination and recording radiation performs a frequency translation hologram. The hologram constructed with a high synthetic frequency and flaw phase multiplication is similar to a conventional acoustic hologram construction at the high frequency.

    摘要翻译: 使用适合于相干信号处理方法的辐射的测试对象中的结构特征成像的装置和方法。 使用接收到的瑕疵信号的频率和相位相乘来模拟测试波长比实际波长小至少一到两个数量级。 照明和记录辐射之间的波长的明显减少执行频率转换全息图。 用高合成频率和缺陷相位相乘构成的全息图类似于高频下的传统声全息图结构。

    Automated measurement system employing eddy currents to adjust probe
position and determine metal hardness
    4.
    发明授权
    Automated measurement system employing eddy currents to adjust probe position and determine metal hardness 失效
    自动测量系统采用涡流调节探头位置并确定金属硬度

    公开(公告)号:US4849693A

    公开(公告)日:1989-07-18

    申请号:US162020

    申请日:1988-02-29

    IPC分类号: G01N27/90

    CPC分类号: G01N27/9053

    摘要: A system for measuring the hardness of cartridge cases employs an eddy current probe for inducing and sensing eddy currents in each cartridge case. A first component of the sensed signal is utilized in a closed loop system for accurately positioning the probe relative to the cartridge case both in the lift off direction and in the tangential direction, and a second component of the sensed signal is employed as a measure of the hardness. The positioning and measurement are carried out under closed loop microprocessor control facilitating hardness testing on a production line basis.

    摘要翻译: 用于测量盒壳硬度的系统采用涡流探头,用于感应和感测每个盒体中的涡流。 感测信号的第一分量被用在闭环系统中,用于在提升偏离方向和切线方向上相对于盒壳精确地定位探针,并且使用感测信号的第二分量作为 的硬度。 定位和测量在闭环微处理器控制下进行,便于生产线上的硬度测试。