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    • 2. 发明授权
    • Method and apparatus for detecting collapse of natural ground in shield
driving method
    • 用于检测盾构驱动方法中自然接地褶皱的方法和装置
    • US5199818A
    • 1993-04-06
    • US773560
    • 1991-11-06
    • Masahiko YamamotoKanji ShibataniHiroaki YamaguchiYasuo KanemitsuTetsuya ShinboTomoyuki AbeYasuhiko IchimuraShoichi Sakanishi
    • Masahiko YamamotoKanji ShibataniHiroaki YamaguchiYasuo KanemitsuTetsuya ShinboTomoyuki AbeYasuhiko IchimuraShoichi Sakanishi
    • E21D9/06E21D9/087E21D9/093
    • E21D9/093
    • A method and an apparatus for performing measurement by a resistivity method in order to detect the thickness of a sludge layer on the outer periphery of a shield machine. A Wenner electrode row (14) on the outer periphery of the machine is used to measure reference resistivities to thereby detect certain resistivities in the depth direction of the natural ground and the sludge layer thickness. At the same time, a dipole electrode row (16) is used to measure voltage distributions in the depth direction of the natural ground and in the direction of the arrangement of the electrodes. The ratios of the values measured by the measurement dipole electrodes to those measured by the reference Wenner electrodes are calculated, and their distribution is charted. When mutually equal values in the distribution map are connected together by continuous curves, a contour-pattern image is obtained, which enables a configuration of the collapse of natural ground to be determined. Such as image can be displayed either two-dimensionally or three-dimensionally by image processing. If a plurality of sets of electrode rows (14) and (16) are arranged in the circumferential direction of the machine, and resistivities are detected while current having different frequencies is supplied, the collapse of the natural ground can be measured quickly.
    • PCT No.PCT / JP91 / 00317 Sec。 371日期1991年11月6日 102(e)日期1991年11月6日PCT 1991年3月8日PCT公布。 出版物WO91 / 14078 日期1991年9月19日。一种用于通过电阻率法进行测量以便检测盾构机外周上的污泥层的厚度的方法和装置。 使用机器外周的文纳电极列(14)来测量参考电阻,从而检测天然地面深度方向上的某些电阻率和污泥层厚度。 同时,使用偶极电极列(16)测量自然地面的深度方向和电极排列方向上的电压分布。 计算由测量偶极子电极测量的值与通过参考Wenner电极测量的值的比率,并绘制其分布。 当通过连续曲线将分布图中的相互相等的值连接在一起时,获得轮廓图案图像,其能够确定自然地面的崩溃的配置。 诸如图像可以通过图像处理二维或三维地显示。 如果在机器的圆周方向上布置多组电极列(14)和(16),并且在提供具有不同频率的电流的同时检测电阻率,则可以快速测量自然地面的塌陷。
    • 3. 发明授权
    • Apparatus having a pair of magnetic field generating cables for
measuring position of an underground excavator
    • 具有用于测量地下挖掘机位置的磁场发生电缆对的装置
    • US5208538A
    • 1993-05-04
    • US778166
    • 1991-12-20
    • Shoichi SakanishiKanji Shibatani
    • Shoichi SakanishiKanji Shibatani
    • E21D9/06E21B47/022E21D9/00G01B7/00G01C15/00G01S5/00
    • E21B47/02224E21D9/003
    • A position measuring apparatus easily and accurately detects the position of an underground excavator, such as a shield excavator, during the underground excavation, and particularly the position thereof on a horizontal plane. The position measuring apparatus comprises a transmitter (10) including at least two cable loops (10a, 10b) which generate AC magnetic fields; a receiver (30) which detects the AC magnetic fields and produces signals representative of the detected fields; and a computing unit (60) which identifies the signals with respect to the originating cable loop and which calculates the position of the underground excavator (20). The two cable loops (10a, 10b) are substantially perpendicular to each other. The receiver (30) includes two magnetic field detecting elements (S.sub.1, S.sub.2) which are substantially perpendicular to each other. The receiver (30) is rotatably driven so as to maintain the magnetic field detecting elements (S.sub.1, S.sub.2) at constant angles to the cable loops (10a, 10b).
    • PCT No.PCT / JP90 / 00847 Sec。 371 1991年12月20日第 102(e)日期1991年12月20日PCT Filed 1990年6月29日PCT出版物 公开号WO91 / 日期:1991年1月10日。在地下挖掘期间,位置测量装置容易且精确地检测地下挖掘机(例如盾构挖掘机)的位置,特别是其在水平面上的位置。 位置测量装置包括发射器(10),其包括产生AC磁场的至少两个电缆环(10a,10b); 接收器(30),其检测AC磁场并产生表示检测到的场的信号; 以及计算单元(60),其识别相对于始发缆线回路的信号,并计算地下挖掘机(20)的位置。 两个电缆环(10a,10b)基本上彼此垂直。 接收器(30)包括基本上彼此垂直的两个磁场检测元件(S1,S2)。 接收器(30)被可旋转地驱动,以将磁场检测元件(S1,S2)保持与电缆环(10a,10b)成一定角度。
    • 4. 发明授权
    • Offset drift reducing device for use in a differential amplification
circuit
    • 用于差分放大电路的偏移漂移降低装置
    • US5276367A
    • 1994-01-04
    • US885894
    • 1992-05-20
    • Kanji ShibataniMasao HagiwaraMasakazu Moritoki
    • Kanji ShibataniMasao HagiwaraMasakazu Moritoki
    • H03K5/24
    • H03K5/2481H03K5/249
    • In a measuring differential amplifier having first and second input terminals for subtracting a first signal applied to the first input terminal from a second signal applied to the second input terminal to obtain a subtraction and for outputting a signal corresponding to A times of the subtraction, a circuit for reducing an offset generated during measurement. Prior to the measurement, the second signal is applied to the first and second input terminals so that the differential amplifier outputs a voltage corresponding to A times of a difference between the second signals, i.e., A times an offset voltage. At this time, the differential amplifier is connected at its output terminal to one end of a capacitor grounded at the other end so that the voltage corresponding to A times of the offset voltage is applied to the capacitor for charging. During the measurement, the output terminal of the differential amplifier is disconnected from one end of the capacitor so that the voltage charged in the capacitor is applied to the adder and multiplied by 1/A to become again the offset voltage. The adder adds a signal indicative of the offset voltage to the first signal to obtain an addition signal and supplies the addition signal to the first input terminal of the differential amplifier. Thus, the input offset voltage is canceled by an offset voltage newly generated at the differential amplifier.
    • 在具有第一和第二输入端的测量差分放大器中,用于从施加到第二输入端的第二信号中减去施加到第一输入端的第一信号以获得减法并输出与减法的A次相对应的信号, 用于减少测量期间产生的偏移的电路。 在测量之前,第二信号被施加到第一和第二输入端子,使得差分放大器输出对应于第二信号之间的差的A倍的电压,即A乘以偏移电压。 此时,差分放大器在其输出端子连接到在另一端接地的电容器的一端,使得对应于偏移电压的A倍的电压被施加到用于充电的电容器。 在测量期间,差分放大器的输出端与电容器的一端断开,使得电容器中充电的电压加到加法器上并乘以1 / A再次成为偏置电压。 加法器将表示偏移电压的信号与第一信号相加以获得相加信号,并将加法信号提供给差分放大器的第一输入端。 因此,输入偏移电压被差分放大器新产生的偏移电压抵消。