公开(公告)号：US4030027A

公开(公告)日：1977-06-14

申请号：US627463

申请日：1975-10-30

申请人： Takeo Yamada ,  Seigo Ando ,  Katsujiro Watanabe

发明人： Takeo Yamada ,  Seigo Ando ,  Katsujiro Watanabe

IPC分类号： G01B7/02 ,  G01R33/12

CPC分类号： G01B7/023

摘要： Apparatus for non-contact measurement of the distance between a detecting coil and a metallic body mounted in confronting relation thereto comprising a differential amplifier to one terminal of which is connected a reference oscillator and to the other terminal of which is connected a feedback circuit. The feedback circuit incorporates the detecting coil and the amplified differential output signal between the AC signals applied to the differential amplifier and the signal supplied to the differential amplifier resulting from the impedance of the detecting coil corresponding to the distance between the detecting coil and the metallic body are thus a measure of the distance. At least one of the parameters of open-loop gain of the differential amplifier and the amount of feedback in the feedback circuit is pre-determined so as to linearize at least for a pre-determined measuring range the output characteristics of the differential amplifier resulting from the variation of the detecting coil impedance caused by the variation of the distance.

摘要翻译： 用于非接触式测量检测线圈与安装在相对关系中的金属体之间的距离的装置，包括差分放大器，其一端连接基准振荡器，另一端连接反馈电路。 反馈电路将检测线圈和施加到差分放大器的AC信号之间的放大的差分输出信号和由检测线圈的阻抗相对应地提供给差分放大器的信号对应于检测线圈和金属体之间的距离 因此是距离的度量。 预先确定差分放大器的开环增益的参数和反馈电路中的反馈量中的至少一个，以便至少对于预定的测量范围线性化，由差分放大器产生的输出特性 由距离的变化引起的检测线圈阻抗的变化。

公开(公告)号：US3997835A

公开(公告)日：1976-12-14

申请号：US521812

申请日：1974-11-07

申请人： Seigo Ando ,  Takeo Yamada ,  Katsujiro Watanabe

发明人： Seigo Ando ,  Takeo Yamada ,  Katsujiro Watanabe

IPC分类号： G01B7/00 ,  G01B7/02 ,  G01D5/20 ,  G01R33/00

CPC分类号： G01B7/023 ,  G01D5/202

摘要： In measuring the distance between a measuring sensor and a metallic body, the sensor is comprised by a resonance circuit including a capacitor and a coil, and the sensor is connected to the input of a Q multiplier circuit which is impressed with an AC signal having a predetermined frequency. The non-linear distance-inductance characteristic of the coil is compensated for by adjusting the selectivity of the resonance circuit so that the amplifier included in the Q multiplier circuit produces a linear output. Such compensation is performed by adjusting the gain and/or the amount of positive feedback of the Q multiplier circuit.

摘要翻译： 在测量传感器和金属体之间的距离时，传感器由包括电容器和线圈的谐振电路组成，并且传感器连接到Q乘法电路的输入端，Q乘法器电路被施加于具有 预定频率。 通过调节谐振电路的选择性来补偿线圈的非线性距离 - 电感特性，使得包括在Q乘法器电路中的放大器产生线性输出。 通过调整Q乘法器电路的增益和/或正反馈量来执行这种补偿。

公开(公告)号：US4019131A

公开(公告)日：1977-04-19

申请号：US627137

申请日：1975-10-30

申请人： Takeo Yamada ,  Katsujiro Watanabe ,  Seigo Ando

发明人： Takeo Yamada ,  Katsujiro Watanabe ,  Seigo Ando

IPC分类号： G01B7/04 ,  B21B38/02 ,  G01B7/00 ,  G01B7/14 ,  G01B7/28 ,  G01B7/34 ,  G01R33/12

CPC分类号： G01B7/28 ,  B21B38/02 ,  G01B7/345

摘要： The measuring apparatus comprises an electromagnetic induction type non-contacting distance measuring device including a detection coil disposed near the edge of a running metal strip, a filter for deriving out the high frequency component and the low frequency component of the output of the detection coil, means responsive to the high frequency component for determining the contour of the wavy edge of the strip and means responsive to the low frequency component for adjusting the lateral position of the detection coil with respect to the edge of the metal strip.

摘要翻译： 测量装置包括电磁感应式非接触式距离测量装置，其包括设置在运行中的金属条的边缘附近的检测线圈，用于导出检测线圈的输出的高频分量和低频分量的滤波器， 响应于高频分量的装置，用于确定条的波浪边缘的轮廓，以及响应于低频分量的装置，用于调节检测线圈相对于金属条的边缘的横向位置。

公开(公告)号：US4095469A

公开(公告)日：1978-06-20

申请号：US776901

申请日：1977-03-11

申请人： Takeo Yamada ,  Katsujiro Watanabe ,  Seigo Ando ,  Akira Kameyama

发明人： Takeo Yamada ,  Katsujiro Watanabe ,  Seigo Ando ,  Akira Kameyama

IPC分类号： G01K7/36 ,  G01R33/12

CPC分类号： G01K7/36

摘要： An apparatus for measuring the temperature of a metallic body in a non-contact maner includes an electronic circuitry for measuring a change in the impedance of a detecting coil arranged oppposite to the metallic body. The electronic circuitry comprises an operational amplifier, a negative feedback circuit with adjustable feedback factor, a positive feedback circuit, an oscillator, a phase shifter circuit and a synchronous detection circuit. The change in the impedance of the detecting coil is caused by the effect of eddy current produced by the application of alternating field to the metallic body, and this impedance change is dependent on change in the temperature of the metallic body. By adjusting the negative feedback factor .beta..sub.N of the negative feedback circuit and the phase angle .theta. of the phase shifter circuit in the electronic circuitry, the relationship between the distance measured between the detecting coil and the metallic body and the measured output level, the temperature measuring sensitivity relative to the temperature of the metallic body and the temperature measuring sensitivity relative to the measuring distance can be determined as desired.

摘要翻译： 用于测量非接触式接管装置中的金属体的温度的装置包括用于测量与金属体相对布置的检测线圈的阻抗变化的电子电路。 电子电路包括运算放大器，具有可调整反馈因子的负反馈电路，正反馈电路，振荡器，移相器电路和同步检测电路。 检测线圈的阻抗变化是由于通过对金属体施加交变场而产生的涡流的影响引起的，该阻抗变化取决于金属体的温度变化。 通过调整负反馈电路的负反馈因子βN和电子电路中移相器电路的相位角θ，检测线圈与金属体之间测得的距离与测量输出电平之间的关系，温度 可以根据需要确定相对于金属体的温度的测量灵敏度和相对于测量距离的温度测量灵敏度。

公开(公告)号：US3995211A

公开(公告)日：1976-11-30

申请号：US643935

申请日：1975-12-23

申请人： Takeo Yamada ,  Seigo Ando ,  Katsujiro Watanabe

发明人： Takeo Yamada ,  Seigo Ando ,  Katsujiro Watanabe

IPC分类号： G01N27/90 ,  G01R33/00

CPC分类号： G01N27/9046

摘要： The detector comprises a reference AC signal generator with one terminal grounded, a feedback amplifier having one input connected to receive the reference AC signal; a feedback network coupled to the output of the feedback amplifier, the other input of the feedback amplifier, and the grounded terminal so as to supply a feedback voltage between the grounded terminal and the other input of the feedback amplifier; and a detector for detecting the output of the feedback amplifier. The feedback network includes two serially connected detection coils spaced in the direction of movement of a metallic member to be detected to vary their impedances in accordance with the variation in the electric or magnetic characteristic of the metallic member. Further, the pair of detection coils are arranged such that when the homogeneous portions of the metallic member pass by these coils they provide a substantially constant feedback ratio whereas when a portion having electric or magnetic characteristic different from those of the homogeneous portions passes between the detection coils, the inversion between a larger feedback ratio than the constant value and a smaller feedback ratio than the constant value is obtained, thereby detecting the position of the portion to be detected.

摘要翻译： 该检测器包括一个接地的一个参考交流信号发生器，一个反馈放大器，一个输入端连接以接收基准交流信号; 耦合到反馈放大器的输出，反馈放大器的另一个输入端和接地端子的反馈网络，以便在接地端子和反馈放大器的另一个输入端之间提供反馈电压; 以及用于检测反馈放大器的输出的检测器。 反馈网络包括两个串联连接的检测线圈，该检测线圈沿着待检测的金属构件的移动方向间隔开，以根据金属构件的电或磁特性的变化来改变其阻抗。 此外，一对检测线圈被布置成使得当金属构件的均匀部分通过这些线圈时，它们提供基本恒定的反馈比，而当具有与均匀部分的电特性或磁特性不同的部分在检测 获得比恒定值大的反馈比和比常数值更小的反馈比之间的反转，从而检测待检测部分的位置。

公开(公告)号：US4309902A

公开(公告)日：1982-01-12

申请号：US107420

申请日：1979-12-26

申请人： Kazuo Sano ,  Katsujiro Watanabe ,  Seigo Ando

发明人： Kazuo Sano ,  Katsujiro Watanabe ,  Seigo Ando

IPC分类号： B21C51/00 ,  B21B38/02 ,  B65H26/02 ,  G01B7/00 ,  G01B7/28 ,  G01B7/34 ,  G01B21/20 ,  G01B7/14 ,  G01L5/04 ,  G01R33/12

CPC分类号： B21B38/02 ,  B65H26/02 ,  G01B7/345

摘要： A method for continuously measuring the steepness of a defective flatness of a metal strip during rolling, which comprises: detecting a variation in the relative distance between a metal strip during rolling and a distance-detecting means arranged adjacent to the surface of said metal strip, during the travel thereof between two support rolls arranged at a prescribed spacing, by means of said distance-detecting means, as a vibration including a vibration corresponding to a defective flatness produced in said metal strip; calculating the natural vibration frequency of said metal strip during the travel thereof between said two support rolls, from the detected value of the tension applied to said metal strip during the travel thereof between said two support rolls, the specific weight of said metal strip, and the distance between said two support rolls; cutting off the frequency components, which are below said calculated value of the frequency of said metal strip, from said detected value of the vibration of said metal strip obtained by said distance-detecting means, to detect the vibration of said metal strip, which corresponds to only the defective flatness of said metal strip; detecting, from said detected value thus obtained of the vibration of said metal strip, which corresponds to only said defective flatness, the amplitude and the frequency of said vibration; and, continuously calculating the ratio amplitude/(travelling speed/frequency) of said vibration, i.e., the accurate steepness of the defective flatness of said metal strip, from the detected values thus obtained of the amplitude and the frequency of said vibration, and the separately determined travelling speed of said metal strip.

摘要翻译： 一种用于连续地测量轧制期间金属带的缺陷平坦度的陡度的方法，其包括：检测轧制期间的金​​属带与邻近所述金属带的表面布置的距离检测装置之间的相对距离的变化， 在通过所述距离检测装置的两个支撑辊之间的移动期间，通过所述距离检测装置作为包括对应于在所述金属带中产生的有缺陷的平坦度的振动的振动; 计算所述金属带在所述两个支撑辊之间的行进期间的固有振动频率，从在所述两个支撑辊之间的行进期间施加到所述金属带的张力的检测值，所述金属带的比重和 所述两个支撑辊之间的距离; 从由所述距离检测装置获得的所述金属带的振动的所述检测值中切断低于所述金属带的频率的所述计算值的频率分量，以检测对应于所述金属带的振动 仅限于所述金属带的有缺陷的平坦度; 从所获得的所述金属带的振动的所述检测值检测到所述振动的振幅和频率仅对应于所述有缺陷的平坦度; 并且从由此获得的所述振动的振幅和频率的检测值连续计算所述振动的振幅/（行进速度/频率），即所述金属带的有缺陷的平坦度的准确陡度，并且 分别确定所述金属带的行进速度。

公开(公告)号：US3972432A

公开(公告)日：1976-08-03

申请号：US550958

申请日：1975-02-19

申请人： Toshihiro Mori ,  Katsujiro Watanabe ,  Akihiko Nishisaka

发明人： Toshihiro Mori ,  Katsujiro Watanabe ,  Akihiko Nishisaka

IPC分类号： B21C37/08 ,  B23K9/12 ,  B23K11/24 ,  B23K13/00 ,  G01B7/31 ,  G01N27/82 ,  G01N27/90 ,  G01N29/24 ,  G05D3/14 ,  B65G7/00

CPC分类号： G05D3/14 ,  G01B7/31 ,  G01N27/82 ,  G01N27/9006

摘要： Disclosed is an apparatus for rotationally positioning a welded steel pipe in response to a seam section thereof which comprises a driving means for subjecting the welded steel pipe to a high speed-normal rotation and low speed-counter rotation about its axis, a detecting signal-generating means including an AC bridge circuit, a sensor disposed close to the surface of the welded steel pipe, a differential amplifier and a synchronous detector, to produce, when the welded steel pipe makes a high speed-normal rotation, a negative peak voltage signal and in succession a positive peak voltage signal in response to the seam section of the welded steel pipe and to produce, when the welded steel pipe makes a low speed-back rotation. a positive peak voltage signal and in succession a negative peak voltage signal in response to said seam section, a first Schmitt circuit for producing an output when the level of said detecting signal has exceeded the zero level, a second Schmitt circuit for producing an output when the level of said detecting signal has exceeded a positive specified level, a flip-flop circuit set in response to the rising operation of the second Schmitt circuit output and reset in response to the falling operation of the first Schmitt circuit output, a monostable multivibrator for producing an output pulse signal having a prescribed time width in response to the falling operation of the flip-flop circuit output, and means for controlling said driving means for said welded steel pipe so that when the monostable multivibrator has produced an output pulse signal during said high speed-normal rotation, the welded steel pipe is changed-over from the high speed-normal rotation to the low speed-back rotation; and when the monostable multivibrator has produced an output pulse signal during said low speed-counter rotation, the welded steel pipe is promptly stopped.