公开(公告)号：US08878518B2

公开(公告)日：2014-11-04

申请号：US13566564

申请日：2012-08-03

申请人： Masahisa Niwa ,  Kunitaka Okada ,  Rudolf Hajek ,  Jiri Kutej ,  Timothy J. Warneck

发明人： Masahisa Niwa ,  Kunitaka Okada ,  Rudolf Hajek ,  Jiri Kutej ,  Timothy J. Warneck

IPC分类号： G01R19/00

CPC分类号： G01D3/02 ,  G01D18/00

摘要： A mode detector in a sensor interface is configured to detect a mode specified by a mode signal when an input signal received from a side of a first terminal is the mode signal. A communication portion in the interface transmits an electric signal, obtained from a sensor circuit, to a side of a second terminal when a mode detected with the detector is a sensor output mode. The communication portion receives an input signal from the side of the first terminal while transmitting an output signal to the side of the second terminal, when a mode detected with the detector is a communication mode.

摘要翻译： 传感器接口中的模式检测器被配置为当从第一端子侧接收的输入信号是模式信号时，检测由模式信号指定的模式。 当用检测器检测到的模式是传感器输出模式时，接口中的通信部分将从传感器电路获得的电信号发送到第二终端的一侧。 当用检测器检测到的模式是通信模式时，通信部分从第一终端侧接收输入信号，同时将输出信号发送到第二终端的一侧。

公开(公告)号：US20140035558A1

公开(公告)日：2014-02-06

申请号：US13566564

申请日：2012-08-03

申请人： Masahisa NIWA ,  Kunitaka Okada ,  Rudolf Hajek ,  Jiri Kutej ,  Timothy J. Warneck

发明人： Masahisa NIWA ,  Kunitaka Okada ,  Rudolf Hajek ,  Jiri Kutej ,  Timothy J. Warneck

IPC分类号： G01R19/00

CPC分类号： G01D3/02 ,  G01D18/00

摘要： A mode detector in a sensor interface is configured to detect a mode specified by a mode signal when an input signal received from a side of a first terminal is the mode signal. A communication portion in the interface transmits an electric signal, obtained from a sensor circuit, to a side of a second terminal when a mode detected with the detector is a sensor output mode. The communication portion receives an input signal from the side of the first terminal while transmitting an output signal to the side of the second terminal, when a mode detected with the detector is a communication mode.

摘要翻译： 传感器接口中的模式检测器被配置为当从第一端子侧接收的输入信号是模式信号时，检测由模式信号指定的模式。 当用检测器检测到的模式是传感器输出模式时，接口中的通信部分将从传感器电路获得的电信号发送到第二终端的一侧。 当用检测器检测到的模式是通信模式时，通信部分从第一终端侧接收输入信号，同时将输出信号发送到第二终端的一侧。

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：US20110304323A1

公开(公告)日：2011-12-15

申请号：US13026798

申请日：2011-02-14

申请人： Kunitaka Okada ,  Masahisa Niwa

发明人： Kunitaka Okada ,  Masahisa Niwa

IPC分类号： G01B7/14

CPC分类号： G01B7/003

摘要： The position sensor includes a moving member configured to be displaced in response to displacement of a measurement target, a resonant unit, an oscillation unit, a signal processing unit, an output unit, a signal absence detection unit, and a low-pass filter. The resonant unit includes a detection coil arranged to have inductance varied corresponding to displacement of the moving member. The resonant unit is configured to have a resonant frequency determined by the inductance of the detection coil. The oscillation unit is configured to output an oscillation signal having its magnitude oscillating at a frequency corresponding to the resonant frequency. The signal processing unit is configured to determine the displacement of the measurement target on the basis of the oscillation signal. The output unit is configured to output an output signal indicative of the displacement of the measurement target determined by the signal processing unit. The signal absence detection unit is configured to judge whether or not the oscillation signal is output from the oscillation unit. The signal absence detection unit is configured to, upon judging that the oscillation signal is not output from the oscillation unit, output a malfunction detection signal to the signal processing unit. The low-pass filter is interposed between the oscillation unit and the signal absence detection unit. The signal processing unit is configured to, upon receiving the malfunction detection signal, issue occurrence of malfunction. The low-pass filter is configured to have a cut-off frequency which passes the oscillation signal corresponding to the resonant frequency of the resonant unit in a normal condition, but blocks the oscillation signal output from the oscillation unit when the resonant unit sees an oscillation at an abnormal frequency.

摘要翻译： 位置传感器包括响应于测量对象，谐振单元，振荡单元，信号处理单元，输出单元，信号缺失检测单元和低通滤波器的位移而移位的移动构件。 谐振单元包括检测线圈，该检测线圈布置成具有相应于移动构件的位移变化的电感。 谐振单元被配置为具有由检测线圈的电感确定的谐振频率。 振荡单元被配置为输出振幅信号，该振荡信号的幅度以对应于谐振频率的频率振荡。 信号处理单元被配置为基于振荡信号确定测量对象的位移。 输出单元被配置为输出指示由信号处理单元确定的测量对象的位移的输出信号。 信号缺失检测单元被配置为判断振荡信号是否从振荡单元输出。 信号缺失检测单元被配置为在判断振荡信号未从振荡单元输出时，向信号处理单元输出故障检测信号。 低通滤波器置于振荡单元和信号缺失检测单元之间。 信号处理单元被配置为在接收到故障检测信号时发生故障发生。 低通滤波器被配置为具有在正常状态下通过与谐振单元的谐振频率对应的振荡信号的截止频率，但是当谐振单元看到振荡时，阻断从振荡单元输出的振荡信号 在异常频率。

公开(公告)号：US20100225332A1

公开(公告)日：2010-09-09

申请号：US12679157

申请日：2008-09-19

申请人： Masahisa Niwa ,  Kunitaka Okada ,  Fumihiro Kasano ,  Sukoya Tawaratsumida

发明人： Masahisa Niwa ,  Kunitaka Okada ,  Fumihiro Kasano ,  Sukoya Tawaratsumida

IPC分类号： G01R27/28

CPC分类号： H03K17/9547 ,  H03K17/9502

摘要： A proximity sensor has an oscillation circuit, an amplitude measurement circuit, a control circuit and a signal processing circuit. The oscillation circuit has an LC resonant circuit and an oscillation control circuit that is configured to supply an electric current to the LC resonant circuit to generate oscillating voltage across the LC resonant circuit. The amplitude measurement circuit is configured to produce an amplitude signal corresponding to the amplitude of the oscillating voltage. The control circuit is configured to set the negative conductance of the oscillation control circuit to a critical value by which the LC resonant circuit can oscillate based on the amplitude signal. The signal processing circuit is configured to produce a distance signal corresponding to the distance between an object and the sensing coil based on a parameter associated with the negative conductance.

摘要翻译： 接近传感器具有振荡电路，幅度测量电路，控制电路和信号处理电路。 振荡电路具有LC谐振电路和振荡控制电路，其被配置为向LC谐振电路提供电流以在LC谐振电路两端产生振荡电压。 幅度测量电路被配置为产生对应于振荡电压幅度的振幅信号。 控制电路被配置为将振荡控制电路的负电导设置为基于振幅信号使LC谐振电路能够振荡的临界值。 信号处理电路被配置为基于与负电导相关联的参数产生对应于物体和感测线圈之间的距离的距离信号。

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。