公开(公告)号：US06973820B2

公开(公告)日：2005-12-13

申请号：US10865956

申请日：2004-06-14

申请人： Takehiro Watarai ,  Fuminori Nakashima ,  Hiromi Hiramatsu

发明人： Takehiro Watarai ,  Fuminori Nakashima ,  Hiromi Hiramatsu

IPC分类号： F02B77/08 ,  G01L23/22

CPC分类号： G01L23/222 ,  F02B77/08 ,  F23Q2007/002 ,  G01L27/00

摘要： A combustion pressure sensor for an internal combustion engine is provided. The sensor includes a sensing element such as a piezoelectric device sensitive to a physical load applied thereto to produce an electric signal indicative thereof and a bendable member. The bendable member is bent upon application of the combustion pressure in the engine to apply the physical load to the sensing element. Specifically, the physical load is applied to the sensing element which arises from the bend deformation of the bendable member, thus eliminating the need for a complete surface-to-surface contact between the sensing element and the bendable member. This results in a decreased unit-to-unit variation in sensitivity of combustion pressure sensors and ensures the stability of output characteristics of the combustion pressure sensor.

摘要翻译： 提供一种用于内燃机的燃烧压力传感器。 传感器包括诸如对施加到其上的物理负载敏感的压电装置的感测元件，以产生指示其的电信号和可弯曲构件。 当将发动机中的燃烧压力施加到传感元件上时，可弯曲构件被弯曲。 具体地说，物理负载被施加到由可弯曲构件的弯曲变形产生的感测元件，从而消除了感测元件和可弯曲构件之间的完整的表面到表面接触的需要。 这导致燃烧压力传感器的灵敏度的单位到单位变化的降低，并确保燃烧压力传感器的输出特性的稳定性。

公开(公告)号：US5719460A

公开(公告)日：1998-02-17

申请号：US563378

申请日：1995-11-28

申请人： Takehiro Watarai ,  Satoshi Hayashi ,  Kenzi Kato ,  Kazuhiko Miura ,  Tomoo Kawase ,  Yoshinobu Takeuchi

发明人： Takehiro Watarai ,  Satoshi Hayashi ,  Kenzi Kato ,  Kazuhiko Miura ,  Tomoo Kawase ,  Yoshinobu Takeuchi

IPC分类号： G01C19/56 ,  H01L41/08

CPC分类号： G01C19/5607 ,  G01C19/5656

摘要： An angular velocity detector includes vibrator made of piezoelectric material and having a pair of arms. A pair of driving electrodes are attached to the arms in order to generate vibrations in the arms. A pair of detecting electrodes, which are attached to the arms, detect the vibrations of the arms. Therefore, the pair of driving electrodes can cause the arms to vibrate uniformly and stably, so that a S/N ratio of the angular velocity sensor can be improved.

摘要翻译： 角速度检测器包括由压电材料制成并具有一对臂的振动器。 一对驱动电极附接到臂上以在臂中产生振动。 安装在臂上的一对检测电极检测臂的振动。 因此，一对驱动电极能够使臂均匀稳定地振动，能够提高角速度传感器的S / N比。

公开(公告)号：US06182508B2

公开(公告)日：2001-02-06

申请号：US08992008

申请日：1997-12-17

申请人： Yoshinobu Takeuchi ,  Satoshi Hayashi ,  Takehiro Watarai ,  Shinro Oda ,  Junji Moriwaki ,  Tomoyuki Kanda ,  Katuhide Akimoto

发明人： Yoshinobu Takeuchi ,  Satoshi Hayashi ,  Takehiro Watarai ,  Shinro Oda ,  Junji Moriwaki ,  Tomoyuki Kanda ,  Katuhide Akimoto

IPC分类号： G01P102

CPC分类号： G01C19/5607

摘要： An angular rate sensor is provided which measures the angular rate of a moving object such as an automotive vehicle. The angular rate sensor includes an installation base and an oscillator. The oscillator is excited to oscillate in a preselected direction perpendicular to an axis of rotation of the moving object and provides a signal indicative thereof. The installation base is used for installation of the sensor on the moving object and has an improved orientation structure for orienting the oscillator relative to the installation base during installation of the oscillator on the installation base so that the oscillator may oscillate in the preselected direction. The angular rate sensor is disposed within a casing through improved vibration isolators for absorbing unwanted vibrations impinging upon an operation of the sensor.

摘要翻译： 提供了一种角速率传感器，其测量诸如机动车辆的移动物体的角速率。 角速率传感器包括安装基座和振荡器。 激励振荡器以垂直于移动物体的旋转轴的预选方向振荡并提供指示其的信号。 安装基座用于将传感器安装在移动物体上，并且在将振荡器安装在安装基座上时具有改进的定向结构，用于将振荡器相对于安装基座定向，使得振荡器可以在预选的方向上振荡。 角速率传感器通过改进的隔振器设置在壳体内，用于吸收冲击传感器操作的不想要的振动。

公开(公告)号：US06167744A

公开(公告)日：2001-01-02

申请号：US09195127

申请日：1998-11-18

申请人： Katsuhide Akimoto ,  Takehiro Watarai ,  Kenji Kato ,  Kazuhiko Miura

发明人： Katsuhide Akimoto ,  Takehiro Watarai ,  Kenji Kato ,  Kazuhiko Miura

IPC分类号： G01P2100

CPC分类号： G01C19/5607 ,  G01P21/02

摘要： A drive circuit supplies a FB (feedback) signal having a predetermined frequency to drive electrodes to vibrate a vibrator. An angular velocity detecting circuit detects a vibratory movement caused in a direction normal to an oscillating direction of the vibrator based on a sensing signal of angular velocity sensing electrodes, thereby generating an angular velocity signal. A signal input circuit supplies a diagnostic signal having a frequency different from that of the FB signal, which is entered into the vibrator via diagnosing electrodes. A diagnosis circuit generates a breakdown signal based on a signal responsive to the diagnostic signal which is obtained from at least one of the drive electrodes and the angular velocity sensing electrodes.

摘要翻译： 驱动电路提供具有预定频率的FB（反馈）信号以驱动电极以使振动器振动。 角速度检测电路基于角速度感测电极的感测信号来检测沿垂直于振动器的振动方向的方向产生的振动，由此产生角速度信号。 信号输入电路提供具有与FB信号不同的频率的诊断信号，该信号通过诊断电极进入振动器。 诊断电路基于响应于从至少一个驱动电极和角速度感测电极获得的诊断信号的信号产生击穿信号。

公开(公告)号：US6151965A

公开(公告)日：2000-11-28

申请号：US234506

申请日：1999-01-21

申请人： Takehiro Watarai

发明人： Takehiro Watarai

IPC分类号： G01C19/56 ,  G01P9/00

CPC分类号： G01C19/5607

摘要： An angular rate sensor is provided which measures the angular rate of motion applied to a moving object and which features the structure minimizing electrical noise of an output. The angular rate sensor includes generally a first tuning fork, a second tuning fork, and a torsion beam. The first tuning fork includes two tines and serves as a drive oscillator and a measuring oscillator. The second tuning fork includes two tines which extend in the same direction as the first and second tines partially surrounding the first tuning fork and which connect at ends thereof with ends of the tines of the first tuning fork through a stem extending substantially perpendicular to the tines of the first and second tuning forks. The torsion beam extends substantially along the center line of the sensor and supports the stem on a base. The width of the torsion beam is smaller than an overall width of the first tuning fork, thereby minimizing leakage of energy of self-excited oscillation from the drive oscillator to the measuring oscillator and achieving effective transmission of vibratory energy to the measuring oscillator which is produced by the Coriolis force resulting from application of angular motion to the sensor.

摘要翻译： 提供角速率传感器，其测量施加到移动物体的角速度，其特征在于使输出的电噪声最小化。 角速度传感器通常包括第一音叉，第二音叉和扭力梁。 第一个音叉包括两个齿，用作驱动振荡器和测量振荡器。 第二音叉包括两个尖齿，它们沿与第一和第二尖齿相同的方向延伸，该第一和第二尖齿部分地围绕第一音叉并且在其端部处与第一音叉的齿的端部通过基本垂直于尖齿的杆延伸的杆连接 的第一和第二个调音叉。 扭转梁基本上沿着传感器的中心线延伸并且将杆支撑在基座上。 扭力梁的宽度小于第一音叉的整体宽度，从而将自激振荡的能量从驱动振荡器的最小化泄漏到测量振荡器，并实现振动能量有效传输到产生的测量振荡器 由通过向传感器施加角运动而产生的科里奥利力。

公开(公告)号：US5987987A

公开(公告)日：1999-11-23

申请号：US58787

申请日：1998-04-13

申请人： Takehiro Watarai

发明人： Takehiro Watarai

IPC分类号： G01C19/5607 ,  G01P9/04 ,  H01L41/08

CPC分类号： G01C19/5607 ,  H01L2224/45015 ,  H01L2224/45124 ,  H01L2224/45144 ,  H01L2224/4809 ,  H01L2224/48091 ,  H01L2224/48137 ,  H01L2224/4823 ,  H01L2224/48472 ,  H01L2224/49171 ,  H01L2224/73265 ,  H01L2224/78313 ,  H01L2224/78318 ,  H01L2224/78901 ,  H01L2224/85181 ,  H01L2224/85205 ,  H01L2224/92247 ,  H01L24/45 ,  H01L24/78 ,  H01L2924/01013 ,  H01L2924/01014 ,  H01L2924/01019 ,  H01L2924/01039 ,  H01L2924/01046 ,  H01L2924/01078 ,  H01L2924/01079 ,  H01L2924/19041 ,  H01L2924/3011

摘要： Drive electrodes and sensing electrodes are formed on a front face of a piezoelectric body of a vibrator. A first reference electrode is formed on a rear face. Second reference electrodes are formed on side faces of arm bars of the vibrator at a position corresponding to the sensing electrodes. The second reference electrodes are connected to the first reference electrode formed on said rear face.

公开(公告)号：US08715474B2

公开(公告)日：2014-05-06

申请号：US13411743

申请日：2012-03-05

申请人： Keigo Mizutani ,  Takehiro Watarai ,  Norikazu Kajiyama

发明人： Keigo Mizutani ,  Takehiro Watarai ,  Norikazu Kajiyama

IPC分类号： G01N27/407

CPC分类号： G01N27/4074

摘要： A gas sensor element has a first cell, a second cell, and a solid electrolyte layer having proton conductivity commonly used by the first cell and the second cell. The first cell has a first cathode and a first anode exposed to the target detection gas containing hydrogen atoms. The second cell has a second anode, a second cathode, and a shield layer with which the second anode is covered. A voltage is supplied to the first and second cells. A gas concentration of the target detection gas is calculated on the basis of a difference between a current of the first cell and a current of the second cell because the current in the first cell is a sum of proton conductivity current and an electron conductivity current. The current in the second cell is an electron conductive current only.

摘要翻译： 气体传感器元件具有第一电池，第二电池和具有通常由第一电池和第二电池使用的质子传导的固体电解质层。 第一单元具有暴露于含有氢原子的目标检测气体的第一阴极和第一阳极。 第二单元具有第二阳极，第二阴极以及覆盖第二阳极的屏蔽层。 向第一和第二电池提供电压。 基于第一单元电流和第二单元电流之间的差来计算目标检测气体的气体浓度，因为第一单元中的电流是质子传导电流和电子传导电流之和。 第二电池中的电流仅为电子导电电流。

公开(公告)号：US20120103057A1

公开(公告)日：2012-05-03

申请号：US13282684

申请日：2011-10-27

申请人： Takehito KIMATA ,  Takehiro Watarai

发明人： Takehito KIMATA ,  Takehiro Watarai

IPC分类号： G01M15/10

CPC分类号： G01N15/0656

摘要： In a PM detection sensor, a gas introduction hole is formed in a cover unit which surrounds a PM detection element. The gas introduction hole faces a detection part having detection electrodes of a comb structure. A projected part generated when an opening part of the gas introduction hole is projected on the detection part is within an inside area of the detection part. The projected area of the opening part of the gas introduction hole is positioned within the inside area having a uniform electric field intensity between the detection electrodes. The target detection gas is directly introduced through the gas introduction hole to the area having the uniform electric field intensity generated on the detection part. PM contained in the target detection gas is captured and accumulated on the area having the uniform electric field intensity but not on the area having non-uniform electric field intensity.

摘要翻译： 在PM检测传感器中，在围绕PM检测元件的盖单元中形成有气体导入孔。 气体导入孔面对具有梳状结构的检测电极的检测部。 当气体引入孔的开口部分突出在检测部分上时产生的突出部分在检测部分的内部区域内。 气体导入孔的开口部的投影面积位于检测电极之间具有均匀电场强度的内部区域内。 目标检测气体通过气体导入孔被直接引入到在检测部上产生均匀的电场强度的区域。 包含在目标检测气体中的PM被捕获并累积在具有均匀电场强度但不在具有不均匀电场强度的区域上。

公开(公告)号：US06282957B1

公开(公告)日：2001-09-04

申请号：US09686169

申请日：2000-10-12

申请人： Katsuhide Akimoto ,  Takehiro Watarai ,  Kenji Kato ,  Kazuhiko Miura

发明人： Katsuhide Akimoto ,  Takehiro Watarai ,  Kenji Kato ,  Kazuhiko Miura

IPC分类号： G01C1900

CPC分类号： G01C19/5607 ,  G01P21/02

摘要： A drive circuit supplies a FB feedback signal having a predetermined frequency to drive electrodes to vibrate a vibrator. An angular velocity detecting circuit detects a vibratory movement caused in a direction normal to an oscillating direction of the vibrator based on a sensing signal of angular velocity sensing electrodes, thereby generating an angular velocity signal. A signal input circuit supplies a diagnostic signal having a frequency different from that of the FB signal, which is entered into the vibrator via diagnosing electrodes. A diagnosis circuit generates a breakdown signal based on a signal responsive to the diagnostic signal which is obtained from at least one of the drive electrodes and the angular velocity sensing electrodes.

摘要翻译： 驱动电路提供具有预定频率的FB反馈信号以驱动电极以振动振动器。 角速度检测电路基于角速度感测电极的感测信号来检测沿垂直于振动器的振动方向的方向产生的振动，由此产生角速度信号。 信号输入电路提供具有与FB信号不同的频率的诊断信号，该信号通过诊断电极进入振动器。 诊断电路基于响应于从至少一个驱动电极和角速度感测电极获得的诊断信号的信号产生击穿信号。

公开(公告)号：US6101878A

公开(公告)日：2000-08-15

申请号：US46505

申请日：1998-03-24

申请人： Takehiro Watarai

发明人： Takehiro Watarai

IPC分类号： G01C19/5607 ,  G01C19/00 ,  G01P9/00 ,  H04R17/00

CPC分类号： G01C19/5607 ,  Y10T29/42

摘要： A method of improving an output characteristic of an angular rate sensor including, for example, a fork oscillator and an improved structure of an angular rate sensor are provided. The improvement of the output characteristic is achieved by adjusting a physical structure of the oscillator to minimize unwanted vibrations of the oscillator or noises of a sensor output. The adjustment of the physical structure is achieved by trimming away an edge portion of the oscillator or a supporter for supporting the oscillator on a base.