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    • 3. 发明授权
    • Nondestructive testing apparatus
    • 无损检测仪器
    • US06202490B1
    • 2001-03-20
    • US09562037
    • 2000-05-01
    • Ryosuke TaniguchiShinichi HattoriTakahiro SakamotoTakashi ShimadaKanji Matsuhashi
    • Ryosuke TaniguchiShinichi HattoriTakahiro SakamotoTakashi ShimadaKanji Matsuhashi
    • G01N2900
    • G01B17/02G01B17/00G01N29/2412G01N29/40G01N29/42G01N29/46G01N2291/014G01N2291/02827G01N2291/02854G01N2291/0421G01N2291/102
    • A nondestructive testing apparatus is provided with a wave transmitter by a metal-based magnetostrictive vibrator, a magnetically excited current feeding device for feeding the magnetically excited current to the magnetostrictive vibrator, a wave receiver for detecting an acoustic elastic wave propagating through the measurement object, a filter for extracting a signal in a target frequency band to be measured, and an automatically amplifying rate controlling function-equipped amplifier for automatically controlling the amplifying rate so as to obtain a given magnitude amplitude regardless of the magnitude of the reflection wave or the transmission wave detected by the wave receiver, which constitute a feedback loop. The apparatus is further provided with a signal processor for processing the signal detected by the above-described wave receiver, and a display device for displaying the process result obtained by the signal waveform detected by the above-described wave receiver or the above-described signal processor.
    • 非破坏性试验装置具有通过金属基磁致伸缩振动器的波发射器,用于将磁激励电流馈送到磁致伸缩振动器的磁激励电流馈送装置,用于检测通过测量对象传播的声弹性波的波接收器, 用于提取要测量的目标频带中的信号的滤波器以及用于自动控制放大率的自动放大率控制功能的放大器,以便获得给定幅度幅度,而不管反射波或传输的幅度如何 由波形接收器检测到的波形,构成反馈回路。 该装置还设置有用于处理由上述波接收器检测的信号的信号处理器,以及显示装置,用于显示由上述波形接收器检测到的信号波形获得的处理结果或上述信号 处理器。
    • 4. 发明授权
    • Method of mounting elastic wave generator
    • 安装弹性波发生器的方法
    • US06804875B2
    • 2004-10-19
    • US10411278
    • 2003-04-11
    • Ryosuke TaniguchiShinichi HattoriTakahiro SakamotoTakashi ShimadaKanji Matsuhashi
    • Ryosuke TaniguchiShinichi HattoriTakahiro SakamotoTakashi ShimadaKanji Matsuhashi
    • H02K1500
    • G01V1/04B06B1/08G10K11/004Y10T29/49009Y10T29/4902Y10T29/49078Y10T29/4908
    • An elastic wave generator includes an excitation coil, a magnetostriction oscillator around which the excitation coil is wound and an oscillator support. The excitation coil is wound around the oscillator, which is made of laminated magnetostriction sheets having a positive strain characteristic, in which length varies directionally upon magnetic excitation. The oscillator support has a first support surface bearing against a first end surface of the magnetostriction oscillator, intersecting the direction along which the length of the magnetostriction oscillator changes and a second support surface shrink-fit against a second end surface of the magnetostriction oscillator, intersecting the direction along which the length of the magnetostriction oscillator changes. Thus, the changes in the length of the magnetostriction oscillator due to the magnetic excitation of the excitation coil appearing at the first and second end surfaces is directly supported by the first and second support surfaces. The magnetostriction oscillator is shrink-fit by cooling so it may be placed between the support surfaces while cooled.
    • 弹性波发生器包括励磁线圈,缠绕有励磁线圈的磁致伸缩振荡器和振荡器支撑。 励磁线圈缠绕在振荡器周围,振荡器由具有正应变特性的层叠磁致伸缩片制成,其中长度在磁激发时定向变化。 振荡器支撑件具有抵靠磁致伸缩振荡器的第一端面的第一支撑表面,与磁致伸缩振荡器的长度变化的方向相交,第二支撑表面与磁致伸缩振荡器的第二端面收缩配合, 磁致伸缩振荡器的长度沿着其方向改变。 因此,出现在第一和第二端面处的励磁线圈的磁激励引起的磁致伸缩振荡器长度的变化由第一和第二支撑表面直接支撑。 磁致伸缩振荡器通过冷却进行收缩配合,从而可以将其放置在支撑表面之间同时冷却。
    • 5. 发明授权
    • Acoustic wave transmission system and method for transmitting an acoustic wave to a drilling metal tubular member
    • 用于将声波传输到钻井金属管状构件的声波传输系统和方法
    • US06272916B1
    • 2001-08-14
    • US09415258
    • 1999-10-12
    • Ryosuke TaniguchiTakashi ShimadaTakahiro Sakamoto
    • Ryosuke TaniguchiTakashi ShimadaTakahiro Sakamoto
    • H04H900
    • E21B47/16
    • An acoustic wave transmission system comprises an acoustic wave generating metal tubular member for converting information about the bottom of a borehole, which is obtained by a bottom hole sensor, into an acoustic wave. The acoustic wave generating metal tubular member includes a acoustic wave generating mechanism having at least a magnetostrictive oscillator which is mounted in a recess formed in an outer wall of the acoustic wave generating metal tubular member, and on which a compressive load is imposed by means of a pre-load mechanism using a vise. The magnetostrictive oscillator is constructed of a stack of thin plates each made of a metal magnetostrictive material having a property of increasing its dimensions when magnetized, the thin plates being bonded together by a heat-resistant adhesive. The magnetostrictive oscillator can thus have a buckling strength large enough to resist the compressive load imposed thereon by the pre-load mechanism and a stress due to a strain caused in itself. The acoustic wave generating metal tubular member further includes an excitation current supplier for supplying either a rectangular, sinusoidal, or triangular alternating excitation current modulated with the information about the bottom of the borehole and having a frequency that is half the carrier frequency of the acoustic wave, or a series of excitation pulses modulated with the information about the bottom of the borehole and having a pulse repetition rate that is equal to the carrier frequency of the acoustic wave, to an excitation winding wound around the magnetostrictive oscillator.
    • 声波传输系统包括声波产生金属管状构件,用于将由井底传感器获得的钻孔底部的信息转换成声波。 声波产生金属管状构件包括具有至少一个磁致伸缩振荡器的声波产生机构,该磁致伸缩振荡器安装在形成在声波产生金属管状构件的外壁上的凹部中,并且借助于 使用虎钳的预加载机构。 磁致伸缩振荡器由薄板堆叠构成,每个薄板由金属磁致伸缩材料制成,具有在磁化时其尺寸增加的特性,薄板通过耐热粘合剂粘合在一起。 因此,磁致伸缩振荡器可以具有足够大的屈​​曲强度,以抵抗由预加载机构施加在其上的压缩载荷和由于其本身引起的应变引起的应力。 声波产生金属管状构件还包括激励电流供应器,用于提供被调制的关于钻孔底部的信息的矩形,正弦或三角交变激励电流,并且具有作为声波的载波频率的一半的频率 或者一系列激励脉冲调制到围绕磁致伸缩振荡器缠绕的激励绕组的关于钻孔底部的信息并且具有等于声波的载波频率的脉冲重复率的激励脉冲。