公开(公告)号：US6157248A

公开(公告)日：2000-12-05

申请号：US299796

申请日：1999-04-26

Applicant: Yoshihisa Minami ,  Masaru Yasuda

Inventor： Yoshihisa Minami ,  Masaru Yasuda

IPC: G05F1/00 ,  H03H11/12

CPC classification number: H03H11/1252 ,  H03H11/1221

Abstract: An active filter circuit (a band stop filter type or a band pass filter type) having high Q value and high efficiency and which is suitable for integration has an input signal vi inputted from the input terminal supplied to the non-inverting input terminal of the first differential amplifier. The output terminal of the first differential amplifier is connected to the non-inverting input terminal of the second differential amplifier, and the first capacitor 3 is connected between this connection line and the alternate current ground. An output of the second differential amplifier is connected to the non-inverting input terminal of the first differential amplifier via the second capacitor, the inverting input terminal of the first differential amplifier, the inverting input terminal of the second differential amplifier 4, the non-inverting input terminal of the third differential amplifier, the output terminal of the third differential amplifier and the output terminal of the active filter circuit. An inverting input terminal of the third differential amplifier is connected to alternate current ground. The output of the second differential amplifier becomes the output signal vo of the active filter circuit.

Abstract translation: 具有高Q值且高效率并且适合于积分的有源滤波器电路（带阻滤波器类型或带通滤波器类型）具有从提供给第一输入端子的非反相输入端子的输入端子输入的输入信号vi 第一差分放大器 第一差分放大器的输出端子连接到第二差分放大器的非反相输入端，并且第一电容器3连接在该连接线与交流接地之间。 第二差分放大器的输出经由第二电容器，第一差分放大器的反相输入端子，第二差分放大器4的反相输入端子，第二差分放大器的反相输入端子， 第三差分放大器的反相输入端子，第三差分放大器的输出端子和有源滤波器电路的输出端子。 第三差分放大器的反相输入端子连接到交流电流接地。 第二差分放大器的输出变为有源滤波器电路的输出信号vo。

公开(公告)号：US5333501A

公开(公告)日：1994-08-02

申请号：US838788

申请日：1992-03-17

Applicant: Masumi Okada ,  Shingo Nagashima ,  Kazuo Nakamachi ,  Kazuo Hattori ,  Yoji Takanashi ,  Masaru Yasuda ,  Masami Ishikawa ,  Yoshiyasu Murata

Inventor： Masumi Okada ,  Shingo Nagashima ,  Kazuo Nakamachi ,  Kazuo Hattori ,  Yoji Takanashi ,  Masaru Yasuda ,  Masami Ishikawa ,  Yoshiyasu Murata

IPC: G01M3/24 ,  G01N29/00

CPC classification number: G01M3/243

Abstract: In an abnormality monitoring apparatus of the present invention, a plurality of detectors (13, 14) are arranged at a plurality of positions in the axial direction of a pipeline (11) to detect respective sound waves (37) propagating from a position (B) of occurrence of abnormality. The aforementioned position is calculated from a sound wave detection time difference between the detectors (13, 14) and position between the detectors (13, 14). The apparatus further includes an abnormal waveform memory unit (28) for storing the waveforms of a plurality of kinds of typical abnormal sound waves generated from abnormality on the pipeline (11). A display device (19) displays, on the same image screen, the abnormal waveform stored in the abnormal waveform memory unit and that of the sound wave detected. It is, therefore, possible for a monitoring personnel to readily identify a kind of abnormality occurred.

Abstract translation: PCT No.PCT / JP90 / 01155 Sec。 371日期：1992年3月17日 102（e）日期1992年3月17日PCT 1990年9月11日PCT PCT。 出版物WO91 / 04477 在本发明的异常监视装置中，在管线（11）的轴向的多个位置配置多个检测器（13,14），以检测各个声波（37 ）从异常发生的位置（B）传播。 根据检测器（13,14）之间的声波检测时间差和检测器（13,14）之间的位置计算上述位置。 该装置还包括异常波形存储单元（28），用于存储由管道（11）上的异常产生的多种典型异常声波的波形。 显示装置（19）在同一图像画面上显示存储在异常波形存储部中的异常波形和检测到的声波的异常波形。 因此，监控人员可以容易地识别发生的异常情况。