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    • 2. 发明授权
    • Ultrasonic inspection method and apparatus
    • 超声波检查方法和装置
    • US3791199A
    • 1974-02-12
    • US3791199D
    • 1969-08-01
    • REPUBLIC STEEL CORP
    • TOTH JJUDD T
    • G01N29/38G01N29/04
    • G01N29/38
    • Testing method and apparatus, incorporating a pair of transducers positioned on opposite sides of a weld seam. The transducers are alternately energized, and signals from the transducers are gated to develop signals representative of defects in various regions of the workpiece under test. Individual references are established for the different regions, and the signals are compared with the associated references. Output signals representing major defects are generated in accordance with various relationships of signals from the different regions of the workpiece.
    • 测试方法和装置,包括位于焊缝相对两侧的一对换能器。 换能器交替通电,并且来自换能器的信号被门控以产生表示待测工件的各个区域中的缺陷的信号。 针对不同区域建立单独的参考,并将信号与相关参考文献进行比较。 根据来自工件的不同区域的信号的各种关系产生代表主要缺陷的输出信号。