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1. 发明授权

US5349860A Apparatus for measuring the thickness of clad material 失效
标题翻译：用于测量包层材料厚度的装置
公开(公告)号：US5349860A
公开(公告)日：1994-09-27
申请号：US882455
申请日：1992-05-12
申请人： Tetsuo Nakano, deceased , Takeshige Katsumata , Megumu Tanaka , Isao Narushima , Yoshiharu Hirano , Kazuko Nakano
发明人： Tetsuo Nakano, deceased , Takeshige Katsumata , Megumu Tanaka , Isao Narushima , Yoshiharu Hirano , Kazuko Nakano
IPC分类号： G01N29/07 , G01N29/10
CPC分类号： G01N29/07 , G01N2291/02854 , G01N2291/044
摘要： An apparatus for measuring the thickness of a clad material having an outer mother metal and an inner clad metal. The apparatus includes a transmitter crystal and a receiver crystal of a double crystal angle-type probe which contact the outer surface of the mother metal, for receiving a first echo from the boundary surface of the mother metal and clad metal, and for receiving a second echo from the inner, bottom surface of the clad metal. The apparatus further includes an amplifier for amplifying the echo signals, a detector for detecting the zero-crossing points of the echoes, a zero point determining circuit, a calculator for calculating the periods from a zero point in time to the zero-crossing points, and a calculator for calculating the thickness of the clad material and clad metal based on the calculated periods.
摘要翻译：一种用于测量具有外母金属和内包层金属的复合材料的厚度的装置。该装置包括接触母金属外表面的双晶角型探针的发射晶体和接收晶体，用于从母金属和复合金属的边界面接收第一回波，并接收第二从复合金属的内部，底部表面回波。该装置还包括用于放大回波信号的放大器，用于检测回波的过零点的检测器，零点确定电路，用于计算从零点到过零点的周期的计算器，以及用于基于计算的周期计算包层材料和复合金属的厚度的计算器。

2. 发明授权

US4624127A Method and apparatus for measurement of thickness utilizing ultrasonic pulses 失效
标题翻译：使用超声波脉冲测量厚度的方法和装置
公开(公告)号：US4624127A
公开(公告)日：1986-11-25
申请号：US274453
申请日：1981-06-17
申请人： Isao Narushima , Morio Nakano
发明人： Isao Narushima , Morio Nakano
IPC分类号： G01B17/02 , G01N29/00
CPC分类号： G01B17/02
摘要： Method and apparatus are disclosed for measurement of the thickness of a workpiece by periodically transmitting ultrasonic pulses into a workpiece by means of a probe provided at its front surface with a delay material, receiving ultrasonic echo pulses reflected from the bottom surface of the workpiece, measuring the period of time corresponding to the period of time elapsed from the transmission of each ultrasonic pulse to the reception of its related echo pulse minus the period of time corresponding to the propagation time of the ultrasonic pulse through the delay material which is specified by the setting of a zero-point adjusting circuit, calculating the thickness of the workpiece from such measured time periods, and displaying the thickness value thus calculated on a display. The setting of the zero-point adjusting circuit is carried out by adjusting the setting of the zero-point adjusting circuit so that the value displayed on the display becomes substantially zero while keeping the probe separated from the workpiece.
摘要翻译：公开了用于测量工件厚度的方法和装置，通过使用延伸材料在其前表面设置的探针周期性地将超声波脉冲发射到工件中，接收从工件的底面反射的超声回波脉冲，测量对应于从每个超声脉冲传输到其相关回波脉冲的接收所经过的时间的时间段减去与通过设置指定的延迟材料的超声脉冲的传播时间相对应的时间段的零点调整电路，从这样的测量时间段计算工件的厚度，并且在显示器上显示由此计算出的厚度值。零点调整电路的设定通过调整零点调整电路的设定来进行，使得显示在显示器上的值在保持探头与工件分离的同时基本为零。

3. 发明授权

US4388830A Method and apparatus for measurement of thickness utilizing ultrasonic pulses 失效
标题翻译：使用超声波脉冲测量厚度的方法和装置
公开(公告)号：US4388830A
公开(公告)日：1983-06-21
申请号：US274451
申请日：1981-06-17
申请人： Isao Narushima , Morio Nakano
发明人： Isao Narushima , Morio Nakano
IPC分类号： G01B17/02 , G01N29/00 , G01H5/00 , G01N24/00
CPC分类号： G01B17/02
摘要： Method and apparatus are disclosed for measuring the thickness of a workpiece by periodically transmitting ultrasonic pulses into the workpiece, receiving ultrasonic echo pulses reflected from the bottom surface of the workpiece, measuring the period of time elapsed from the time of transmission of each ultrasonic pulse to the time of reception of its related echo pulse by counting the number of clock pulses within the time period, counting each of such measured time periods by clock pulses, and deriving from each of such counted time periods and number of clock pulses within the time periods values a signal representing the thickness of the workpiece, wherein the measurement of the elapsed time period is effected with respect to a plurality of successive echo pulses, during which the phase of the clock pulses is caused to be shifted by a predetermined amount of 2 .pi./N where N is an integer not less than 2 in a preselected direction upon completion of each measurement of the elapsed time period in such a manner that the resolution or accuracy in the thickness value finally obtained is improved.
摘要翻译：公开了用于通过将超声波脉冲周期性地传送到工件中，接收从工件的底面反射的超声回波脉冲来测量工件的厚度的方法和装置，测量从每个超声波脉冲的传输时间经过的时间到通过计数在该时间段内的时钟脉冲数来接收其相关的回波脉冲的时间，通过时钟脉冲计数这些测量的时间周期中的每一个，并且从这些计数的时间周期和时间周期内的每个时钟脉冲数导出对表示工件厚度的信号进行估值，其中经过的时间段的测量是针对多个连续回波脉冲进行的，在此期间使时钟脉冲的相位偏移预定量的2p / N，其中N是在经过t的每次测量完成之后，在预选方向上为不小于2的整数以使得最终获得的厚度值的分辨率或精度得到改善的方式。

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