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1. 发明授权

US08222895B2 Displacement sensing device 有权
标题翻译：位移传感装置
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。

2. 发明申请

US20100117630A1 DISPLACEMENT SENSING DEVICE 有权
标题翻译：位移传感装置
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。

3. 发明授权

US08164325B2 Displacement sensor 有权
标题翻译：位移传感器
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。

4. 发明授权

US08878518B2 Sensor device and sensor interface 有权
标题翻译：传感器设备和传感器接口
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。

5. 发明申请

US20110304323A1 POSITION SENSOR 有权
标题翻译：位置传感器
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。

6. 发明授权

US09097558B2 Position sensor 有权
标题翻译：位置传感器
公开(公告)号：US09097558B2
公开(公告)日：2015-08-04
申请号：US13637693
申请日：2011-02-23
申请人： Masahisa Niwa , Kunitaka Okada
发明人： Masahisa Niwa , Kunitaka Okada
IPC分类号： G01R27/02 , G01D5/20
CPC分类号： G01D5/2013
摘要： A position sensor includes a detector, an oscillation circuit, a signal processing circuit, and a resonance circuit having a detection coil and a capacitor. The oscillation circuit forms a negative feedback loop from: an amplitude detection circuit that detects an amplitude of an oscillation signal outputted from the resonance circuit; an integrating circuit that outputs a signal corresponding to a difference between a predetermined reference voltage and the amplitude of the oscillation signal; a negative conductance control circuit that, based on the output of the integrating circuit, controls the negative conductance of the oscillation circuit such that the amplitude of the oscillation signal is equals to the predetermined reference voltage; and an operational amplifier that adjusts such that the oscillation voltage of the resonance circuit is equal to the applied voltage of the negative conductance control circuit.
摘要翻译：位置传感器包括检测器，振荡电路，信号处理电路和具有检测线圈和电容器的谐振电路。所述振荡电路从检测从所述谐振电路输出的振荡信号的振幅的振幅检测电路形成负反馈回路; 积分电路，其输出与预定参考电压和振荡信号的振幅之间的差相对应的信号; 负电导控制电路，其基于所述积分电路的输出，控制所述振荡电路的负电导，使得所述振荡信号的振幅等于所述规定的基准电压; 以及调节使得谐振电路的振荡电压等于负电导控制电路的施加电压的运算放大器。

7. 发明申请

US20130141155A1 DETECTION DEVICE 有权
标题翻译：检测装置
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。

8. 发明授权

US08427138B2 Position sensor 有权
标题翻译：位置传感器
公开(公告)号：US08427138B2
公开(公告)日：2013-04-23
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. The oscillation unit is configured to output an oscillation signal. The signal absence detection unit is configured to judge whether or not the oscillation signal is output from the oscillation unit. 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。振荡单元被配置为输出振荡信号。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。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。

9. 发明申请

US20100225332A1 PROXIMITY SENSOR 有权
标题翻译：接近传感器
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。

10. 发明授权

US07598734B2 Position sensor with a shield member for improving linearity of impedance of the detection coil 有权
标题翻译：带有屏蔽构件的位置传感器，用于提高检测线圈的阻抗线性
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。

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