公开(公告)号：US20130021023A1

公开(公告)日：2013-01-24

申请号：US13637784

申请日：2011-02-23

申请人： Masahisa Niwa ,  Kunitaka Okada

发明人： Masahisa Niwa ,  Kunitaka Okada

IPC分类号： G01B7/14

CPC分类号： G01B7/30 ,  G01D5/202

摘要： A position sensor includes a detection coil printed on a surface of a substrate formed of a dielectric material; and a detection body arranged in an opposing relationship with the detection coil and displaced along a specified orbit with respect to the detection coil in response to a displacement of a target object. The position sensor detects the displacement of the target object based on an inductance of the detection coil varying depending on the displacement of the detection body. At least one of the detection coil and the detection body is formed into such a shape that a change rate of the inductance of the detection coil with respect to the displacement of the detection body is kept constant.

摘要翻译： 位置传感器包括：印刷在由介电材料形成的基板的表面上的检测线圈; 以及检测体，其以与所述检测线圈相反的关系布置，并响应于所述目标物体的位移沿着与所述检测线圈相关的特定轨道移位。 位置传感器基于检测线圈的电感根据检测体的位移而变化来检测目标物体的位移。 检测线圈和检测体中的至少一个形成为使得检测线圈的电感相对于检测体的位移的变化率保持恒定的形状。

公开(公告)号：US08164325B2

公开(公告)日：2012-04-24

申请号：US12120411

申请日：2008-05-14

申请人： Masahisa Niwa ,  Yukiko Nishida ,  Kunitaka Okada

发明人： Masahisa Niwa ,  Yukiko Nishida ,  Kunitaka Okada

IPC分类号： G01B7/00 ,  G01B7/14

CPC分类号： G01D5/202

摘要： An oscillator circuit outputs an oscillator signal with a frequency corresponding to an inductance of a displacement detector coil. An oscillation cycle measurement circuit measures a cycle of the oscillator signal output from the oscillator circuit, and outputs a signal corresponding to the measured cycle. A squaring circuit calculates and outputs a square of the signal output from the oscillation cycle measurement circuit. By the calculation and output of the square of the oscillator signal cycle, a square root component of the product of inductance and capacitance components is eliminated, so that the output signal changes linearly relative to the displacement of a displacement body. As a result, the linearity of the output signal relative to the displacement of the displacement body can be improved.

摘要翻译： 振荡器电路输出具有对应于位移检测器线圈的电感的频率的振荡器信号。 振荡周期测量电路测量从振荡器电路输出的振荡器信号的周期，并输出与测量周期对应的信号。 平方电路计算并输出从振荡周期测量电路输出的信号的平方。 通过振荡器信号周期的平方的计算和输出，消除了电感和电容分量乘积的平方根分量，使得输出信号相对于位移体的位移线性变化。 结果，能够提高输出信号相对于位移体的位移的线性。

公开(公告)号：US08222895B2

公开(公告)日：2012-07-17

申请号：US12523214

申请日：2008-01-11

申请人： Norimi Asahara ,  Yukiko Nishida ,  Masahisa Niwa

发明人： Norimi Asahara ,  Yukiko Nishida ,  Masahisa Niwa

IPC分类号： G01B7/30

CPC分类号： G01B7/30 ,  F16H15/38 ,  G01B7/046 ,  G01D5/2013 ,  G01P3/44 ,  G01P3/488 ,  G01P3/50

摘要： A compact sensing device capable of sensing a rotational angle and a rotational velocity, or a rectilinear moving distance and a moving velocity. A displacement sensing device that senses a rotational angle of a moving member rotation and a distance of a linear movement of the moving member, or senses an angular velocity of the moving member rotation and a velocity of a linear movement of the moving member, includes: a first movable member, moved together with the moving member by a linear movement of the moving member; a second movable member holding the first movable member in a rotatable manner, and rotated together with the moving member by rotation of the moving member; a first sensor outputting a signal in accordance with a linear movement of the first movable member; and a second sensor outputting a signal in accordance with a rotation of the second movable member.

摘要翻译： 能够感测旋转角度，旋转速度或直线移动距离和移动速度的小型感测装置。 检测移动构件旋转的旋转角度和移动构件的线性运动的距离，或感测移动构件旋转的角速度和移动构件的直线运动的速度的位移感测装置包括： 第一可动构件，通过移动构件的线性移动与移动构件一起移动; 第二可动构件，其以可旋转的方式保持所述第一可动构件，并且通过所述移动构件的旋转与所述移动构件一起旋转; 第一传感器，根据第一可动件的直线运动输出信号; 以及第二传感器，其根据第二可动构件的旋转输出信号。

公开(公告)号：US20130141155A1

公开(公告)日：2013-06-06

申请号：US13816602

申请日：2011-08-16

申请人： Masahisa Niwa

发明人： Masahisa Niwa

IPC分类号： H03K17/945

CPC分类号： H03K17/945 ,  H03K17/9542

摘要： A detection device includes a resonance unit having a coil and a capacitor, an oscillation unit for oscillating the resonance unit, and a signal processing unit for detecting the oscillation state of the resonance unit and outputting an object detection signal when oscillation is stopped. The signal processing unit intermittently executes a self-diagnosis mode by forcibly oscillating the oscillation unit to determine whether or not an abnormality occurs in the resonance unit.

摘要翻译： 检测装置包括具有线圈和电容器的谐振单元，用于振荡谐振单元的振荡单元，以及用于检测谐振单元的振荡状态并在振荡停止时输出对象检测信号的信号处理单元。 信号处理单元通过强制地振荡振荡单元来间歇地执行自诊断模式，以确定在谐振单元中是否发生异常。

公开(公告)号：US20100117630A1

公开(公告)日：2010-05-13

申请号：US12523214

申请日：2008-01-11

申请人： Norimi Asahara ,  Yikiko Nishida ,  Masahisa Niwa

发明人： Norimi Asahara ,  Yikiko Nishida ,  Masahisa Niwa

IPC分类号： G01B7/14 ,  G01B7/30

CPC分类号： G01B7/30 ,  F16H15/38 ,  G01B7/046 ,  G01D5/2013 ,  G01P3/44 ,  G01P3/488 ,  G01P3/50

摘要： A compact sensing device capable of sensing a rotational angle and a rotational velocity, or a rectilinear moving distance and a moving velocity. A displacement sensing device that senses a rotational angle of a moving member rotation and a distance of a linear movement of the moving member, or senses an angular velocity of the moving member rotation and a velocity of a linear movement of the moving member, includes: a first movable member, moved together with the moving member by a linear movement of the moving member; a second movable member holding the first movable member in a rotatable manner, and rotated together with the moving member by rotation of the moving member; a first sensor outputting a signal in accordance with a linear movement of the first movable member; and a second sensor outputting a signal in accordance with a rotation of the second movable member.

摘要翻译： 能够感测旋转角度，旋转速度或直线移动距离和移动速度的小型感测装置。 检测移动构件旋转的旋转角度和移动构件的线性运动的距离或感测移动构件旋转的角速度和移动构件的线性运动的速度的位移感测装置包括： 第一可动构件，通过移动构件的线性移动与移动构件一起移动; 第二可动构件，其以可旋转的方式保持所述第一可动构件，并通过所述移动构件的旋转与所述移动构件一起旋转; 第一传感器，根据第一可动件的直线运动输出信号; 以及第二传感器，其根据第二可动构件的旋转输出信号。

公开(公告)号：US07598734B2

公开(公告)日：2009-10-06

申请号：US11574610

申请日：2006-05-12

申请人： Masahisa Niwa ,  Yukiko Inooka ,  Yoshio Mitsutake ,  Tomohiro Ota

发明人： Masahisa Niwa ,  Yukiko Inooka ,  Yoshio Mitsutake ,  Tomohiro Ota

IPC分类号： G01B7/14

CPC分类号： G01D3/02 ,  G01D5/2013

摘要： A position sensor with excellent linearity of coil impedance is provided. This position sensor is equipped with a tubular detection coil, a magnetic core movable in the detection coil, a drive circuit for the detection coil, a signal processing circuit for converting a change in impedance of the detection coil into an electric signal, and a shield member disposed around the detection coil. The shield member is a tubular member having a first inner surface for surrounding an axial region of the detection coil, and a second inner surface for surrounding another axial region of the detection coil. The tubular member is formed such that a distance between the second inner surface and the detection coil is smaller than the distance between the first inner surface and the detection coil.

摘要翻译： 提供了线圈阻抗线性良好的位置传感器。 该位置传感器配备有管状检测线圈，可在检测线圈中移动的磁芯，用于检测线圈的驱动电路，将检测线圈的阻抗变化转换为电信号的信号处理电路，以及屏蔽 构件设置在检测线圈周围。 屏蔽构件是具有用于包围检测线圈的轴向区域的第一内表面和用于围绕检测线圈的另一轴向区域的第二内表面的管状构件。 管状构件形成为使得第二内表面和检测线圈之间的距离小于第一内表面和检测线圈之间的距离。

公开(公告)号：US20060164075A1

公开(公告)日：2006-07-27

申请号：US10519797

申请日：2004-04-22

申请人： Masahisa Niwa

发明人： Masahisa Niwa

IPC分类号： G01B7/14

CPC分类号： G01D3/0365 ,  G01D5/2013

摘要： A displacement detector is provided, which can compensate a change in temperature coefficient of impedance of a coil to a displacement of a core. The detector comprises a constant-current supply unit for outputting a constant current including an alternating current, a coil portion, to which the constant current is supplied, a magnetic core supported to be movable relative to the coil portion in a movable range, and a signal processing circuit for determining a displacement of the core to the coil portion according to a change in output voltage of the coil portion under the supply of the constant current to the coil portion, characteristic-value extracting unit for extracting a characteristic value (V1) from the output voltage of the coil portion, and a level shift circuit for adding a level shift voltage (Vsh) to the characteristic value. A fluctuation width of temperature coefficient of a total (V2) of the characteristic value (V1) and the level shift voltage (Vsh) in the movable range is smaller than the fluctuation width of temperature coefficient of the characteristic value (V1) in the movable range.

摘要翻译： 提供了位移检测器，其可以补偿线圈的阻抗的温度系数与芯的位移的变化。 检测器包括用于输出包括交流电流的恒定电流的恒定电流供应单元，供应恒流的线圈部分，在可移动范围内相对于线圈部分可运动的磁芯，以及 信号处理电路，用于根据线圈部分在向线圈部分的恒定电流供给时的输出电压的变化来确定芯体与线圈部分的位移，特征值提取单元，用于提取特征值（V 1 ）和用于将特征值相加的电平转换电压（Vsh）的电平移位电路。 特征值（V 1）的总和（V 2）和可移动范围内的电平移动电压（Vsh）的温度系数的波动宽度小于特性值（V 1）的温度系数的变动幅度， 在可动范围内。

公开(公告)号：US07006938B2

公开(公告)日：2006-02-28

申请号：US10870314

申请日：2004-06-16

申请人： Jose Marcos Laraia ,  Masahisa Niwa ,  Robert P. Moehrke ,  Jose G. Taveira

发明人： Jose Marcos Laraia ,  Masahisa Niwa ,  Robert P. Moehrke ,  Jose G. Taveira

IPC分类号： G01C19/00 ,  G01C25/00 ,  G01D18/00 ,  G01F25/00 ,  G06F19/00

CPC分类号： G01C25/00 ,  G01D3/022 ,  G01D18/008

摘要： Reactive sensors typically exhibit nonlinear response to temperature variation. Systems and methods are disclosed for compensating for the nonlinear and/or temperature dependent behavior of reactive sensors and for calibrating the post-compensation output signals relative to known samples of the physical parameter under measure. One call of embodiments includes a housing containing at least part of a reactive sensor, a monolithic integrated circuit and a timing reference. The integrated circuit includes a waveform generator for generating a sensor exciting signal, a detector for detecting the response of the sensor to the combination of the exciting signal and the under-measure physical parameter, a temperature compensating unit and the Pade Approximant nonlinearity compensating unit are tuned by use of digitally programmed coefficients. The coefficients calibrate the final output as well as compensating for nonlinearity and temperature sensitivity.

摘要翻译： 无功传感器通常表现出非线性响应。 公开了用于补偿反应式传感器的非线性和/或温度依赖性行为的系统和方法，并且相对于所测量的物理参数的已知样本来校准后补偿输出信号。 一类实施例包括容纳至少一部分无功传感器，单片集成电路和定时参考的壳体。 集成电路包括用于产生传感器激励信号的波形发生器，用于检测传感器对激励信号和不足量物理参数的组合的响应的检测器，温度补偿单元和Pade近似非线性补偿单元。 调整后两个单位的系数以补偿非线性和温度敏感性。

公开(公告)号：US20050283330A1

公开(公告)日：2005-12-22

申请号：US10870314

申请日：2004-06-16

申请人： Jose Laraia ,  Masahisa Niwa ,  Robert Moehrke ,  Jose Taveira

发明人： Jose Laraia ,  Masahisa Niwa ,  Robert Moehrke ,  Jose Taveira

IPC分类号： G01C19/00 ,  G01C25/00 ,  G01D3/02 ,  G01D18/00 ,  G01F25/00 ,  G06F19/00

CPC分类号： G01C25/00 ,  G01D3/022 ,  G01D18/008

摘要： Reactive sensors typically exhibit nonlinear response to the combination of an excitational signal (e.g., sinusoidally oscillating signal) and a physical parameter under measure (e.g., position of magnetic core member). Such sensors are typically sensitive to temperature variation. Systems and methods are disclosed for compensating for the nonlinear and/or temperature dependant behavior of reactive sensors and for calibrating the post-compensation output signals relative to known samples of the physical parameter under measure (e.g., position). One class of embodiments comprises a housing containing at least part of a reactive sensor, a monolithic integrated circuit and a timing reference (e.g., an oscillator crystal). The integrated circuit includes a waveform generator for generating a sensor exciting signal, a detector for detecting the response of the sensor to the combination of the exciting signal and the under-measure physical parameter, a temperature compensating unit and a Pade' Approximant based, nonlinearity compensating unit. The temperature compensating unit and the Pade' Approximant nonlinearity compensating unit are tuned by use of digitally programmed coefficients. The coefficients calibrate the final output as well as compensating for nonlinearity and temperature sensitivity. A highly accurate measurement of the under-measure physical parameter is made possible even though each of the sensor and compensating circuitry may be relatively simple, compact, and low in cost.

摘要翻译： 无功传感器通常对激发信号（例如，正弦振荡信号）和测量下的物理参数（例如，磁芯构件的位置）的组合呈现非线性响应。 这种传感器通常对温度变化敏感。 公开的系统和方法用于补偿反应式传感器的非线性和/或温度依赖性行为以及相对于所测量的物理参数（例如，位置）的已知样本来校准后补偿输出信号。 一类实施例包括包含至少一部分无功传感器，单片集成电路和定时参考（例如，振荡器晶体）的壳体。 集成电路包括用于产生传感器激励信号的波形发生器，用于检测传感器对激励信号与不足量物理参数的组合的响应的检测器，温度补偿单元和基于Pade'近似的非线性 补偿单元。 温度补偿单元和Pade'近似非线性补偿单元通过使用数字编程的系数进行调谐。 系数校准最终输出以及补偿非线性和温度灵敏度。 即使传感器和补偿电路中的每一个可以相对简单，紧凑，成本低，也可以进行低精度物理参数的高精度测量。

公开(公告)号：US08159234B2

公开(公告)日：2012-04-17

申请号：US12538647

申请日：2009-08-10

申请人： Masahisa Niwa

发明人： Masahisa Niwa

IPC分类号： G01R27/26 ,  G01B7/14

CPC分类号： H03K17/954 ,  H03K17/9502

摘要： A proximity sensor includes an L-C resonator, an oscillator for oscillating the L-C resonator, an oscillation detector, an output circuit, and a burnout detecting means. The L-C resonator has a detection coil for detecting an object, and a resonant capacitor connected across the detection coil. The oscillation detector detects an oscillation of the L-C resonator. The burnout detecting means has a time counter for counting a length of a positive voltage period in which a voltage across the resonant capacitor is kept above a predetermined positive voltage, and a discriminator which determines burnout of the detection coil when the counted length exceeds a half of an oscillation cycle of the L-C resonator. The output circuit outputs a detection signal indicative of whether or not the object exists within a detection range of the detection coil, and provides a burnout signal indicative of the burnout of the detection coil.

摘要翻译： 接近传感器包括L-C谐振器，用于振荡L-C谐振器的振荡器，振荡检测器，输出电路和烧坏检测装置。 L-C谐振器具有用于检测物体的检测线圈和连接在检测线圈两端的谐振电容器。 振荡检测器检测L-C谐振器的振荡。 烧断检测装置具有时间计数器，用于对谐振电容器两端的电压保持在预定的正电压以上的正电压周期的长度进行计数，以及当计数长度超过一半时确定检测线圈的烧断的鉴别器 的LC谐振器的振荡周期。 输出电路输出表示物体是否存在于检测线圈的检测范围内的检测信号，并提供表示检测线圈的烧坏的烧坏信号。