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    • 1. 发明专利
    • Ultrasonic flaw detecting method and its probe
    • 超声波检测方法及其探针
    • JPS61105460A
    • 1986-05-23
    • JP22690784
    • 1984-10-30
    • Hitachi Eng Co LtdHitachi LtdTokyo Gas Co Ltd
    • KUBOTA JUNSASAKI SOJIWATABIKI MASAYUKIKOSHIRAE MITSUOFUJITA AKITAKAOKADA MAMORUSHIMIZU SHINICHI
    • G01N29/04G01N29/07G01N29/24
    • G01N29/07G01N2291/044G01N2291/2675
    • PURPOSE:To detect a vertical cracking defect at a high speed without lowering flaw detection precision by arranging only one or two adjacent converters at a distance of one skip from a part to be inspected. CONSTITUTION:Converters 15-18 form the 1st group and converters 19-22 form the 2nd group. Further, the 1st and the 2nd groups cover flaw detection areas I and II. In this case, the converters 17 and 18 in the 1st group and the converters 21 and 22 in the 2nd group are arranged at a distance of one skip from their original positions. When ultrasonic flaw detection is performed by the 1st and the 2nd groups, the transmitting/receiving operation of the converter 15 is performed by the 1st group and then operations of the converters 16-18 are carried out, and flaw detection is performed by a 1-probe method and then flaw detection is performed by a 2-probe method. Thus, the flaw detection is completed and flaw detection by the 2nd group is performed, thus finishing one period of flaw detecting operation.
    • 目的:通过在距离被检测部分的一个跳跃距离内仅设置一个或两个相邻的转换器,高速检测垂直裂纹缺陷,而不会降低探伤精度。 构成:转换器15-18组成第一组,转换器19-22组成第二组。 此外,第一和第二组覆盖探伤区域I和II。 在这种情况下,第一组中的转换器17和18以及第二组中的转换器21和22被布置在距它们的原始位置一跳的距离处。 当第1组和第2组进行超声波探伤时,通过第1组进行转换器15的发送接收动作,然后进行转换器16-18的动作,通过1 探测方法,然后通过2-探针法进行探伤。 因此,完成了缺陷检测,并且执行了第2组的缺陷检测,从而完成了一个缺陷检测操作的周期。
    • 2. 发明专利
    • Ultrasonic inspecting device for cracking defect detection
    • 用于破裂缺陷检测的超声波检查装置
    • JPS61117450A
    • 1986-06-04
    • JP23842784
    • 1984-11-14
    • Hitachi Eng Co LtdHitachi LtdTokyo Gas Co Ltd
    • KUBOTA JUNSASAKI SOJIWATABIKI MASAYUKIKOSHIRAE MITSUOFUJITA AKITAKAOKADA MAMORUSHIMIZU SHINICHI
    • G01N29/04G01N29/06G01N29/07G01N29/11G01N29/38G01N29/42G01N29/44
    • G01N29/4445G01N29/0618G01N29/07G01N29/11G01N29/38G01N29/42G01N2291/02854G01N2291/044G01N2291/2675
    • PURPOSE:To detect a directional defect and discriminate between a shape echo and a defect echo by providing a converter so that an ultrasonic wave is transmitted to and received from a part to be inspected simultaneously and also independently. CONSTITUTION:Transmitted pulses generated by a pulser 51 are supplied to one of converters 31-34 selectively by a multiplexer (MPX) 52 and sent as an ultrasonic wave to the part 43 to be inspected. One of echoes that the converters 31-34 receive from a defect, etc., is selected by the MPX 53 and amplified by a receiver 54 on a frequency selective basis. Then, a gate 55 selects only a signal of time when the signal from the part 43 to be inspected is expected to arrive with time. Then, a defective echo discriminating device 8 calculates the position of a reflection source for the echo from a beam route, amplitude data, data on a flaw detection direction, etc., and stores it together with the respective data to discriminate the defect and decide on its direction. Therefore, the defect is detected speedily and securely.
    • 目的:通过提供转换器来检测方向性缺陷并区分形状回波和缺陷回波,使得超声波同时且独立地被传输到要被检查的部件并被接收。 构成:由脉冲发生器51产生的发送脉冲由多路复用器(MPX)52选择性地提供给转换器31-34之一并作为超声波发送到待检查的部分43。 转换器31-34从缺陷等接收的回波之一由MPX 53选择,并由频率选择性地由接收器54放大。 然后,门55仅选择来自待检查部分43的信号随时间到达的时间信号。 然后,缺陷回波识别装置8计算来自波束路径的回波的反射源的位置,振幅数据,探伤方向上的数据等,并将其与各个数据一起存储以区分缺陷并决定 在它的方向。 因此,可以快速,安全地检测缺陷。