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1. 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。

2. 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。

3. 发明申请

US20130021023A1 POSITION SENSOR 审中-公开
标题翻译：位置传感器
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。

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

US20140035558A1 SENSOR DEVICE AND SENSOR INTERFACE 有权
标题翻译：传感器和传感器接口
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。

6. 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。

7. 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。

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. 发明授权

US08432169B2 Proximity sensor 有权
标题翻译：接近传感器
公开(公告)号：US08432169B2
公开(公告)日：2013-04-30
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. 发明申请

US20130021043A1 POSITION SENSOR 有权
标题翻译：位置传感器
公开(公告)号：US20130021043A1
公开(公告)日：2013-01-24
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： G01R27/26
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。

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