公开(公告)号：US07859662B2

公开(公告)日：2010-12-28

申请号：US11856959

申请日：2007-09-18

申请人： Yutaro Hamatani ,  Shigeki Kanamaru ,  Tateki Mitani ,  Eiji Yagyu

发明人： Yutaro Hamatani ,  Shigeki Kanamaru ,  Tateki Mitani ,  Eiji Yagyu

IPC分类号： G01J3/40

CPC分类号： G01N21/431 ,  G01N21/85 ,  G01N33/2852

摘要： The detection device provides with an optical fiber composed of a core, a clad and a fiber jacket. A grating is applied to the core, and the fiber jacket located at the portion to which the grating is applied is removed so that the clad is in contact with a fuel fed to an injector of a vehicle. The detection device also provides with a light source for incidence of a light in a range of clad mode wavelength to the optical fiber, and a light-sensitive part for detecting an intensity of the light transmitting through the region to which the grating is applied. The optical fiber, light source and light-sensitive part are held in a conduit disposed in a fuel tank or between a fuel pump and the injector of the vehicle.

摘要翻译： 检测装置提供由芯，包层和纤维套组成的光纤。 将光栅施加到芯上，并且去除位于施加光栅的部分处的光纤护套，使得包层与馈送到车辆的喷射器的燃料接触。 该检测装置还提供一个光源，用于将包围模式波长范围内的光入射到光纤;以及光敏部分，用于检测通过施加光栅的区域透射的光的强度。 光纤，光源和感光部分被保持在设置在燃料箱中的导管中，或燃料泵与车辆的喷射器之间。

公开(公告)号：US08285086B2

公开(公告)日：2012-10-09

申请号：US12529865

申请日：2008-01-07

申请人： Satoshi Nishikawa ,  Masakazu Takabayashi ,  Kiichi Yoshiara ,  Eiji Yagyu ,  Tateki Mitani ,  Yutaro Hamatani

发明人： Satoshi Nishikawa ,  Masakazu Takabayashi ,  Kiichi Yoshiara ,  Eiji Yagyu ,  Tateki Mitani ,  Yutaro Hamatani

IPC分类号： G02B6/00 ,  G02B6/34

CPC分类号： G01N21/774

摘要： An optical fiber sensor measuring refractive index of a medium with high sensitivity in a wide range. The optical fiber sensor includes an optical fiber causing a transmission loss due to leakage in the clad propagation mode from a portion of a core and a clad where a Bragg grating is provided, a light source permitting light in a wavelength band in the clad propagation mode to enter the optical fiber, and a light-receiving section receiving the transmitted or reflected light transmitted through the core and the clad at the portion where the Bragg grating is provided. The refractive index of the medium to be measured in contact with the clad is measured according to total intensity of the light received by the light-receiving section. The Bragg grating is inclined at a predetermined angle of inclination to the vertical line vertical to the length direction of the optical fiber.

摘要翻译： 测量宽范围高灵敏度介质折射率的光纤传感器。 光纤传感器包括光纤，该光纤引起由包层传播模式中的泄漏引起的传输损耗，其中芯部和布拉格光栅的包层部分，允许在覆盖传播模式中波长带的光的光源 以及光接收部分，其接收在布拉格光栅提供的部分处透射穿过芯体和包层的透射或反射光。 根据由光接收部接收的光的总强度来测量与包层接触的待测量介质的折射率。 布拉格光栅以与光纤的长度方向垂直的垂直线倾斜预定的倾斜角度。

公开(公告)号：US20100080502A1

公开(公告)日：2010-04-01

申请号：US12529865

申请日：2008-01-07

申请人： Satoshi Nishikawa ,  Masakazu Takabayashi ,  Kiichi Yoshiara ,  Eiji Yagyu ,  Tateki Mitani ,  Yutaro Hamatani

发明人： Satoshi Nishikawa ,  Masakazu Takabayashi ,  Kiichi Yoshiara ,  Eiji Yagyu ,  Tateki Mitani ,  Yutaro Hamatani

IPC分类号： G02B6/00

CPC分类号： G01N21/774

摘要： An optical fiber sensor measuring refractive index of a medium with high sensitivity in a wide range. The optical fiber sensor includes an optical fiber causing a transmission loss due to leakage in the clad propagation mode from a portion of a core and a clad where a Bragg grating is provided, a light source permitting light in a wavelength band in the clad propagation mode to enter the optical fiber, and a light-receiving section receiving the transmitted or reflected light transmitted through the core and the clad at the portion where the Bragg grating is provided. The refractive index of the medium to be measured in contact with the clad is measured according to total intensity of the light received by the light-receiving section. The Bragg grating is inclined at a predetermined angle of inclination to the vertical line vertical to the length direction of the optical fiber.

摘要翻译： 测量宽范围高灵敏度介质折射率的光纤传感器。 光纤传感器包括光纤，该光纤引起由包层传播模式中的泄漏引起的传输损耗，其中芯部和布拉格光栅的包层部分，允许在覆盖传播模式中波长带的光的光源 以及光接收部分，其接收在布拉格光栅提供的部分处透射穿过芯体和包层的透射或反射光。 根据由光接收部接收的光的总强度来测量与包层接触的待测量介质的折射率。 布拉格光栅以与光纤的长度方向垂直的垂直线倾斜预定的倾斜角度。

公开(公告)号：US07077112B2

公开(公告)日：2006-07-18

申请号：US10771458

申请日：2004-02-05

申请人： Tateki Mitani ,  Shigeki Kanamaru ,  Hiroshi Yoshioka ,  Kazushi Ishii

发明人： Tateki Mitani ,  Shigeki Kanamaru ,  Hiroshi Yoshioka ,  Kazushi Ishii

IPC分类号： F02M25/08

CPC分类号： F02M25/08 ,  F02M25/0818

摘要： A fuel vapor leak detecting apparatus, includes: a valve which is in a vapor purge system including a canister that is communicated with a fuel tank and an internal combustion engine, and which controllably closes the vapor purge system; a pressurizing section which introduces atmospheric air into the vapor purge system to pressurize the vapor purge system; and an internal-pressure measuring section which detects an internal pressure of the vapor purge system. The pressurizing section supplies the air for a predetermined time in a state where the vapor purge system is closed. When the internal pressure measured by the internal-pressure measuring section at the air supply is equal to or lower than a preset criterion pressure, it is judged that leak occurs.

摘要翻译： 一种燃料蒸汽泄漏检测装置，包括：阀，其处于包括与燃料箱和内燃机连通的罐的蒸气吹扫系统中，并且可控地关闭蒸气吹扫系统; 加压部分，其将大气引入蒸汽吹扫系统中以对蒸汽吹扫系统加压; 以及检测蒸气吹扫系统的内部压力的内压测量部。 在蒸气吹扫系统关闭的状态下，加压部供给预定时间的空气。 当由内部压力测量部在空气供给下测量的内部压力等于或低于预设的标准压力时，判断为发生泄漏。

公开(公告)号：US20100296080A1

公开(公告)日：2010-11-25

申请号：US12745815

申请日：2008-12-03

申请人： Satoshi Nishikawa ,  Masakazu Takabayashi ,  Eiji Yagyu ,  Kiichi Yoshiara ,  Tateki Mitani ,  Yutarou Hamatani

发明人： Satoshi Nishikawa ,  Masakazu Takabayashi ,  Eiji Yagyu ,  Kiichi Yoshiara ,  Tateki Mitani ,  Yutarou Hamatani

IPC分类号： G01N21/41

CPC分类号： G01N21/431 ,  G01D5/35383 ,  G01N2021/433 ,  G02B6/02085

摘要： An objective of the present invention is to provide an optical fiber sensor which has a simple configuration to enable sensitively measuring a refractive index of a measurement medium in a wide range of refractive indexes. An optical fiber sensor according to the present invention includes; an optical fiber having a core in which a short-period gratings are formed and a cladding, the optical fiber being made so that transmission loss occurs due to cladding-propagation-mode leakage at its cladding portion where the short-period gratings are formed; a light source from which light having a wavelength range of the cladding propagation mode is emitted; and a light receiving unit for receiving transmission or reflection light having passed through the cladding at the position where the short-period gratings are formed. The optical fiber sensor detects, based on the total receiving light intensity that the light receiving unit receives, the refractive index of the measurement medium contacting the cladding, in which the optical fiber is multi-mode one, and the short-period gratings have plural kinds of periods.

摘要翻译： 本发明的目的是提供一种光纤传感器，其具有能够在宽范围的折射率下敏感地测量测量介质的折射率的简单配置。 根据本发明的光纤传感器包括： 具有形成短周期光栅的芯的光纤和包层，使得在形成有短周期光栅的包层部分由于包层传播模式泄漏而发生传输损耗的光纤; 发射具有包层传播模式的波长范围的光的光源; 以及光接收单元，用于在形成短周期光栅的位置处接收穿过包层的透射或反射光。 光纤传感器基于光接收单元接收的总接收光强度来检测与光纤为多模光纤的包层接触的测量介质的折射率，短周期光栅具有多个 种类的时期。

公开(公告)号：US07672544B2

公开(公告)日：2010-03-02

申请号：US11914271

申请日：2006-05-22

申请人： Masakazu Takabayashi ,  Kiichi Yoshiara ,  Yasuhisa Shimakura ,  Sadayuki Matsumoto ,  Tateki Mitani ,  Shigeki Kanamaru ,  Kazushi Ishii

发明人： Masakazu Takabayashi ,  Kiichi Yoshiara ,  Yasuhisa Shimakura ,  Sadayuki Matsumoto ,  Tateki Mitani ,  Shigeki Kanamaru ,  Kazushi Ishii

IPC分类号： G02B6/00

CPC分类号： B60K15/077 ,  B60K2015/03217 ,  G01F23/292 ,  G01F23/2925 ,  G01N21/8507

摘要： An optical fiber sensor that can detect a liquid level or detect a property of liquid with high reliability even under a frequently vibrational environment. The optical fiber sensor includes an optical fiber that includes a core having an area where a grating is formed and a clad, the optical fiber being disposed so that at least a part of the area with the grating is immersed in liquid, a light source for making light incident to the optical fiber so that a cladding mode light having a wavelength band is generated by the grating, and a light receiving unit for detecting the intensity of light which is incident from the light source to the optical fiber and transmitted through the grating.

摘要翻译： 即使在频繁的振动环境下也能够高度可靠地检测液位或检测液体的性质的光纤传感器。 光纤传感器包括光纤，其包括具有形成光栅的区域的芯和包层，光纤被布置成使得具有光栅的区域的至少一部分浸没在液体中，光源用于 使光入射到光纤，使得由光栅产生具有波长带的包层模式光;以及光接收单元，用于检测从光源入射到光纤并透射通过光栅的光的强度 。

公开(公告)号：US20090034901A1

公开(公告)日：2009-02-05

申请号：US11914271

申请日：2006-05-22

申请人： Masakazu Takabayashi ,  Kiichi Yoshiara ,  Yasuhisa Shimakura ,  Sadayuki Matsumoto ,  Tateki Mitani ,  Shigeki Kanamaru ,  Kazushi Ishii

发明人： Masakazu Takabayashi ,  Kiichi Yoshiara ,  Yasuhisa Shimakura ,  Sadayuki Matsumoto ,  Tateki Mitani ,  Shigeki Kanamaru ,  Kazushi Ishii

IPC分类号： G02B6/00 ,  G01N21/00

CPC分类号： B60K15/077 ,  B60K2015/03217 ,  G01F23/292 ,  G01F23/2925 ,  G01N21/8507

摘要： An optical fiber sensor that can detect a liquid level or detect a property of liquid with high reliability even under a frequently vibrational environment. The optical fiber sensor includes an optical fiber that includes a core having an area where a grating is formed and a clad, and is disposed so that at least a part of the area with the grating is immersed in liquid, a light source for making light incident to the optical fiber so that a cladding mode light having a wavelength band is occurred by the grating, and a light receiving unit for detecting the intensity of light which is incident from the light source to the optical fiber and transmitted through the grating.

摘要翻译： 即使在频繁的振动环境下也能够高度可靠地检测液位或检测液体的性质的光纤传感器。 光纤传感器包括光纤，其包括具有形成光栅的区域的芯和包层，并且被布置成使得具有光栅的区域的至少一部分浸没在液体中，用于制造光的光源 入射到光纤，使得由光栅发生具有波长带的包层模式光;以及光接收单元，用于检测从光源入射到光纤并透射通过光栅的光的强度。

公开(公告)号：US08351029B2

公开(公告)日：2013-01-08

申请号：US12745815

申请日：2008-12-03

申请人： Satoshi Nishikawa ,  Masakazu Takabayashi ,  Eiji Yagyu ,  Kiichi Yoshiara ,  Tateki Mitani ,  Yutarou Hamatani

发明人： Satoshi Nishikawa ,  Masakazu Takabayashi ,  Eiji Yagyu ,  Kiichi Yoshiara ,  Tateki Mitani ,  Yutarou Hamatani

IPC分类号： G01N21/41 ,  G01J1/00

CPC分类号： G01N21/431 ,  G01D5/35383 ,  G01N2021/433 ,  G02B6/02085

摘要： An objective of the present invention is to provide an optical fiber sensor which has a simple configuration to enable sensitively measuring a refractive index of a measurement medium in a wide range of refractive indexes. An optical fiber sensor according to the present invention includes; an optical fiber having a core in which a short-period gratings are formed and a cladding, the optical fiber being made so that transmission loss occurs due to cladding-propagation-mode leakage at its cladding portion where the short-period gratings are formed; a light source from which light having a wavelength range of the cladding propagation mode is emitted; and a light receiving unit for receiving transmission or reflection light having passed through the cladding at the position where the short-period gratings are formed. The optical fiber sensor detects, based on the total receiving light intensity that the light receiving unit receives, the refractive index of the measurement medium contacting the cladding, in which the optical fiber is multi-mode one, and the short-period gratings have plural kinds of periods.

摘要翻译： 本发明的目的是提供一种光纤传感器，其具有能够在宽范围的折射率下敏感地测量测量介质的折射率的简单配置。 根据本发明的光纤传感器包括： 具有形成短周期光栅的芯的光纤和包层，使得在形成有短周期光栅的包层部分处的包层传播模式泄漏的情况下，使光纤发生传输损耗; 发射具有包层传播模式的波长范围的光的光源; 以及光接收单元，用于在形成短周期光栅的位置处接收穿过包层的透射或反射光。 光纤传感器基于光接收单元接收的总接收光强度来检测与光纤为多模光纤的包层接触的测量介质的折射率，短周期光栅具有多个 种类的时期。

公开(公告)号：US06986341B2

公开(公告)日：2006-01-17

申请号：US10706089

申请日：2003-11-13

申请人： Tateki Mitani ,  Seiji Tsutsui ,  Shigeki Kanamaru ,  Hiroshi Yoshioka

发明人： Tateki Mitani ,  Seiji Tsutsui ,  Shigeki Kanamaru ,  Hiroshi Yoshioka

IPC分类号： F02M37/00 ,  B60K15/035

CPC分类号： F02M25/0818 ,  Y10T137/86678 ,  Y10T137/87217

摘要： An apparatus for detecting fuel-vapor gas leaks that includes a jet pump (8) that introduces outside air into and pressurizes a vapor purge system including a fuel tank (1) by gasoline flow from a fuel pump (2); an internal pressure sensor (14) for measuring vapor purge system internal pressure, an open/close controllable reference orifice (21) that causes leakage through a reference leak hole; and a storage device for storing as an initial curve pressure changes during pressurization by the jet pump (8) for a predetermined time period, with the reference orifice (21) alone opened. The device can accurately detect leakage even while an internal combustion engine is running because it judges leak presence/absence by comparing a time series in a pressure curve obtained by jet pump (8) pressurization over the predetermined time period while idling with the vapor purge system completely shut-off, with a time series in the initial curve.

摘要翻译： 一种用于检测燃料蒸汽气体泄漏的装置，包括：喷射泵（8），其通过来自燃料泵（2）的汽油流将外部空气引入包括燃料箱（1）的蒸汽吹扫系统并对其加压; 用于测量蒸汽吹扫系统内部压力的内部压力传感器（14），使得通过参考泄漏孔泄漏的打开/关闭可控参考孔（21）; 以及存储装置，用于在喷射泵（8）加压预定时间段期间随着初始曲线压力的变化而存储，同时单独打开基准孔（21）。 通过比较在预定时间段内通过喷射泵（8）加压获得的压力曲线中的时间序列，同时与蒸气吹扫系统空转时，该装置可以准确地检测内燃机运行时的泄漏 完全关闭，在初始曲线中用时间序列。

公开(公告)号：US06802210B2

公开(公告)日：2004-10-12

申请号：US10410339

申请日：2003-04-10

申请人： Tateki Mitani ,  Shigeki Kanamaru ,  Tetsushi Noda

发明人： Tateki Mitani ,  Shigeki Kanamaru ,  Tetsushi Noda

IPC分类号： G01M1500

CPC分类号： F02M37/106 ,  F02M2037/082

摘要： A fuel pump module is formed in such a manner that a sensor unit having a semiconductor diaphragm is provided in a recess of a bracket having a flange portion holding a fuel pump through a high-pressure filter. The recess is closed by a sensor cap having a lead-in pipe to thereby form an tank internal-pressure sensor. While internal pressure of a fuel tank is led into the tank internal-pressure sensor through an internal pressure lead-in pipe, atmospheric pressure is led into the tank internal-pressure sensor through an external air intake hole provided in the lead-in pipe. Thus, internal pressure of the fuel tank is detected.