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    • 4. 发明授权
    • Optical fiber strain measuring apparatus
    • 光纤应变测量仪
    • US5880824A
    • 1999-03-09
    • US924325
    • 1997-09-05
    • Haruyoshi UchiyamaZhixien LiYasushi SatohToshio Kurashima
    • Haruyoshi UchiyamaZhixien LiYasushi SatohToshio Kurashima
    • G01M11/00G01D5/353G01L1/24G01M11/02G01N21/00
    • G01L1/242G01D5/344G01D5/35358
    • An object of the present invention is to provide an optical fiber strain measuring apparatus which can perform precise measurement without causing any fluctuation in signal level. To achieve the above object the present invention comprises: a polarization plane rotation device 105 which rotates a plane of polarization of an optical pulse; a photo-directional coupler 106 which projects an optical pulse projected from the polarization plane rotation device 105 into an optical fiber 107 to be measured, and projects out backscattering light produced in the optical fiber 107 to be measured; a polarization plane rotation device 160 which rotates a plane of polarization of a reference light; a light mixing device 109 for mixing the backscattering light projected out from the photo-directional coupler 106 and the reference light projected from the polarization plane rotation device 160; and a signal processing section 111 which detects the mixed light projected from the light mixing device 109, converts the detected light into an electrical signal and subjects the electrical signal to a predetermined operational processing to obtain a measurement waveform.
    • 本发明的目的是提供一种可以进行精确测量而不引起信号电平波动的光纤应变测量装置。 为了实现上述目的,本发明包括:使光脉冲的偏振平面旋转的偏振面旋转装置105; 将从偏振面旋转装置105投射的光脉冲投射到被测光纤107的光定向耦合器106,投射出待测光纤107中产生的后向散射光; 旋转参考光的偏振平面的偏振面旋转装置160; 用于混合从光定向耦合器106射出的后向散射光和从偏振面旋转装置160投影的参考光的光混合装置109; 以及信号处理部111,其检测从光混合装置109射出的混合光,将检测出的光转换为电信号,并对电信号进行预定的运算处理,得到测定波形。
    • 9. 发明授权
    • Apparatus and method for detecting abnormalities in a secondary air
supplier
    • 用于检测二次空气供应商异常的装置和方法
    • US5119631A
    • 1992-06-09
    • US682703
    • 1991-04-09
    • Nobuaki KayanumaYasushi Satoh
    • Nobuaki KayanumaYasushi Satoh
    • F01N3/22F01N9/00F01N11/00F02B1/04F02D35/00F02D41/22
    • F01N3/222F01N11/00F01N11/007F01N3/22F01N9/00F02D35/0038F02D41/221F01N2550/14F01N2900/0422F02B1/04Y02T10/47
    • Disclosed is an apparatus for detecting abnormality in a secondary air supplier of an engine. The operational status of the engine is monitored by various sensors. When the engine is in a warmed-up state, an electronic control unit (ECU) disables the secondary air supplier to stop secondary air from being supplied to an exhaust manifold. When the engine is in such an operational status in which the secondary air should be supplied, the secondary air supplier is activated and a fuel supplying means is controlled in such a way that a suction air-fuel ratio is forcibly adjusted to a predetermined high value so as to set an exhaust air-fuel ratio low when the secondary air supplier functions properly and set the exhaust air-fuel ratio high when the secondary air supplier is abnormal. When the exhaust air-fuel ratio is detected to be high, the ECU judges the secondary air supplier as abnormal and executes necessary processing, such as outputting an abnormality judgment signal to an external warning device.
    • 公开了一种用于检测发动机的二次空气供给器中的异常的装置。 发动机的运行状态由各种传感器监控。 当发动机处于预热状态时,电子控制单元(ECU)禁止二次空气供应器停止二次空气供应到排气歧管。 当发动机处于其中应提供二次空气的操作状态时,二次空气供给器被启动,并且燃料供给装置被控制成使吸入空燃比被强制地调节到预定的高值 以便当二次风供应器正常工作时将排气空燃比设定为低,并且当二次风供应器异常时将排气空燃比设定为高。 当检测到排气空燃比高时,ECU将二次空气供给器判断为异常,并且执行必要的处理,例如将异常判断信号输出到外部警告装置。