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31. 发明专利

JPS60242316A OPTICAL FIBER GYRO 失效
公开(公告)号：JPS60242316A
公开(公告)日：1985-12-02
申请号：JP8946184
申请日：1984-05-07
申请人： BOEICHO GIJUTSU KENKYU HONBUCH , HITACHI LTD
发明人： TAKAGUCHI TAKASHI , ISHIBASHI AKIHIRO , MIZUNO RIYOU , SUGAYA ATSUSHI , OKADA TEIGO , SONOBE HISAO , SASAYAMA TAKAO , OBO SHIGERU
IPC分类号： G01C19/00 , G01C19/64 , G01C19/72 , G02B6/00 , H01S5/00
摘要： PURPOSE:To obtain the optical fiber gyro with low drift by removing the coating part of an optical fiber wound up along the periphery of a drum and reducing temperature variation. CONSTITUTION:A quartz optical fiber 8 consists of a quartz core 8a, quartz clad 8b as a core part, and coating 8c of silicone resin, and a secondary coating 8d of nylon is removed. Further, the coating 8c is used as a reinforcing material and its thickness is made smaller than the diameter of the core part, obtaining minimum necessary optical fiber strength for optical fiber drum constitution. Consequently, the temperature of the whole drum is uniformed and the optical fiber gyro is reduced in size; and temperature variation with an environmental change of the fiber drum.

32. 发明专利

JPS6085312A SOLID STATE INTERFEROMETER 失效
公开(公告)号：JPS6085312A
公开(公告)日：1985-05-14
申请号：JP19249483
申请日：1983-10-17
申请人： HITACHI LTD
发明人： SASAYAMA TAKAO , OBO SHIGERU , SUGAYA ATSUSHI , SHIBATA TAKANORI , ENDOU AKIRA
IPC分类号： G01C19/00 , G01B9/02 , G01C19/64 , G01C19/72 , G01J3/45 , G02B6/44 , G02F1/125 , G02F1/225
摘要： PURPOSE:To facilitate assembling and adjustment, by forming a light path by optical fiber and a solid state optical waveguide, and integrating an optical modulator on a substrate, which forms the solid state optical waveguide. CONSTITUTION:When application into e.g., a ring interferometer, is performed in detecting angular speed and the like, a solid optical waveguide 30 and a surface acoustic wave element 5 are formed on the surface of a solid optical waveguide substrate 3 comprising ferroelectric body. The waveguide 30 is constituted of an optical multiplexing part 30d and optical demultiplexing parts 30a-30c. Surface acoustic waves are propagated on the surface, on which the waveguide 30 is formed. A light optical modulator utilizing Bragg diffraction is constituted of the element 5. Light from laser 1 is inputted to the waveguide 30 through an isolator 2. A signal from a photodetector 6, which is attached to a hole 6a of the plate 3, is supplied to a phase modulation control circuit 8 through a buffer amplifier 7. The phase of a driving signal of the element 5 is controlled. Both end surfaces of a loop shaped optical fiber ring 4 are butted to the end part of the waveguide 30 and contacted.

33. 发明专利

JP2007205916A Flow measuring device 有权
标题翻译：流量测量装置
公开(公告)号：JP2007205916A
公开(公告)日：2007-08-16
申请号：JP2006025589
申请日：2006-02-02
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SUGAYA ATSUSHI , MIKI TAKAHIRO , HANZAWA KEIJI
IPC分类号： G01F1/00 , G01F1/68 , G01F1/684 , G01F1/72
CPC分类号： G01F1/698 , G01F1/6965
摘要： PROBLEM TO BE SOLVED: To correct the pulsation error of a flow meter according to the magnitude and frequency of the pulsation under an environment of large pulsation or backflow. SOLUTION: A first signal processing system provides a first signal by performing integration processing (smoothing processing) 61 of a nonlinear output signal (voltage output) Vx of a flow detecting element and adjusting the sensitivity of the output signal by linear processing 62. A second signal processing system provides a second signal by performing linear processing 64 of the output signal (source signal) Vx of the flow detecting element, performing integration processing (smoothing processing) 65 of it, and then making it nonlinear again. The difference signal between the first signal and the second signal is amplified 69 to provide a pulsation error correction amount. The pulsation error correction amount is added or subtracted 43 from the output signal (source signal) of the flow detecting element, thereby correcting the nonlinear source signal including the pulsation error. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：在大脉动或回流的环境下，根据脉动的大小和频率来校正流量计的脉动误差。解决方案：第一信号处理系统通过执行流量检测元件的非线性输出信号（电压输出）Vx的积分处理（平滑处理）61并通过线性处理62调节输出信号的灵敏度来提供第一信号第二信号处理系统通过执行流量检测元件的输出信号（源信号）Vx的线性处理64，进行其积分处理（平滑处理）65，然后再次变为非线性，来提供第二信号。第一信号和第二信号之间的差分信号被放大69以提供脉动误差校正量。从流量检测元件的输出信号（源极信号）中增加或减去脉动误差校正量43，从而校正包括脉动误差的非线性源信号。版权所有（C）2007，JPO＆INPIT

34. 发明专利

JP2005283604A Thermal air flowmeter 审中-公开
标题翻译：热空气流量计
公开(公告)号：JP2005283604A
公开(公告)日：2005-10-13
申请号：JP2005185895
申请日：2005-06-27
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SUGAYA ATSUSHI , YAMADA MASAMICHI
IPC分类号： G01F1/68 , G01F1/692 , G01F1/698
摘要： PROBLEM TO BE SOLVED: To adjust sensitivity of the whole sensor to improve accuracy without complicating a circuit or the adjustment when providing a device having a different measurement range of a flow rate according to various kinds of use, in a hot wire type air flowmeter measuring an intake air flow rate of an internal combustion engine of an automobile or the like. SOLUTION: This thermal air flowmeter is provided with: a means constant-temperature driving a heating resistive element 211a by the heating resistive element and temperature compensation resistors 211b, 211c; a means detecting the flow rate by a temperature difference of temperature detection resistive elements 211d-211g disposes on both the sides of the heating resistive element; a means transmitting a signal according to heating power of the heating resistive element to temperature difference output of the temperature detection resistive elements; a digitalization means inputting a signal according to the flow rate of the temperature difference; and a means performing digital computing, and applying correction and the adjustment. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了在提供具有根据各种用途的不同流量测量范围的装置的设备中调整整个传感器的灵敏度以提高精度而不使电路复杂化或调整，在热丝型空气流量计，其测量汽车等的内燃机的进气流量。解决方案：该热空气流量计具有：通过加热电阻元件和温度补偿电阻211b，211c恒温驱动加热电阻元件211a的装置; 通过温度检测电阻元件211d-211g的温度差检测流量的装置设置在加热电阻元件的两侧; 根据加热电阻元件的加热功率将信号发送到温度检测电阻元件的温差输出的装置; 数字化装置根据温差的流量输入信号; 以及执行数字计算的手段，并应用校正和调整。版权所有（C）2006，JPO＆NCIPI

35. 发明专利

JP2003121230A THERMAL FLOWMETER 审中-公开
公开(公告)号：JP2003121230A
公开(公告)日：2003-04-23
申请号：JP2001321578
申请日：2001-10-19
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： SUGAYA ATSUSHI , WATANABE IZUMI , NAKADA KEIICHI , IDE KIYOTOMO
IPC分类号： G01F1/698
摘要： PROBLEM TO BE SOLVED: To make an upper limit of a measuring range for a thermal flowmeter set easily, and to protect heating resistor and a transistor even when an abnormal voltage is generated. SOLUTION: A midpoint of a bridge circuit having the heating resistor 11 for flow measurement and a temperature compensating resistor 12 therefor is connected to an input terminal of a differential amplifier 15, and a current supplied to the bridge circuit is regulated to bring a temperature difference between the heating resistor 11 and the temperature compensating resistor 12 into a prescribed difference via the differential amplifier 15 and the transistor 16. This flowmeter is provided with a first voltage limiting means 18 for limiting a base voltage of the transistor 16, and a second voltage limiting means 10 for limiting an emitter voltage. Setting is conducted to satisfy VB1-VBE

36. 发明专利

JP2003004499A Thermal flowmeter 有权
标题翻译：热流量计
公开(公告)号：JP2003004499A
公开(公告)日：2003-01-08
申请号：JP2001187009
申请日：2001-06-20
申请人： Hitachi Car Eng Co Ltd , Hitachi Ltd , 株式会社日立カーエンジニアリング , 株式会社日立製作所
发明人： SUGAYA ATSUSHI , YAMADA MASAMICHI , NAKADA KEIICHI , WATANABE IZUMI
IPC分类号： G01F1/00 , F02D35/00 , F02D41/00 , F02D45/00 , G01F1/68 , G01F1/692 , G01F1/696 , G01F1/699
摘要： PROBLEM TO BE SOLVED: To obtain a thermal flowmeter in which dust, etc., can be removed from temperature detecting resistors, without causing disconnections, etc., in an exothermic resistor. SOLUTION: Temperature detecting resistors 211d and 211e are arranged on the upstream side of an airflow of the exothermic resistor 211a, and temperature detecting resistors 211f and 211g are arranged on the downstream side. When the self-heat-generating temperatures of the resistors 211d, 211e, 211f, and 211g as well as the heating temperature of the resistor 211a are raised, the temperature distributions in all resistors 211a, 211d, 211e, 211f, and 211g are changed so as to be trapezoidal in distributions. When the temperature distributions are changed, namely, when the temperatures of the resistors 211a, 211d, 211e, 211f, and 211g are raised by heating, the dust, etc., which adhere to the resistors 211a, 211d, 211e, 211f, and 211g can be removed efficiently, where the exothermic resistor 211a alone is not heated to such high temperatures that cause disconnection.
摘要翻译：要解决的问题：为了获得其中可以从温度检测电阻器除去灰尘等的热流量计，而不会在放热电阻器中导致断开等。解决方案：温度检测电阻器211d和211e布置在放热电阻器211a的气流的上游侧，温度检测电阻器211f和211g布置在下游侧。当电阻器211d，211e，211f和211g的自发热温度以及电阻器211a的加热温度升高时，所有电阻器211a，211d，211e，211f和211g中的温度分布发生变化以便在分布中是梯形的。当温度分布改变时，即当电阻器211a，211d，211e，211f和211g的温度通过加热而升高时，附着在电阻器211a，211d，211e，211f和 211g可以被有效地除去，其中单独的放热电阻器211a不被加热到导致断开的高温。

37. 发明专利

JP2001324364A THERMAL AIR, FLOW RATE MEASUREMENT DEVICE, ITS FLOW METER, INTERNAL COMBUSTION ENGINE USING IT, AND THERMAL AIR FLOW RATE MEASUREMENT METHOD 失效
公开(公告)号：JP2001324364A
公开(公告)日：2001-11-22
申请号：JP2000141749
申请日：2000-05-15
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： SUGAYA ATSUSHI , YAMADA MASAMICHI , IGARASHI SHINYA , YONEDA HIROSHI , OTA KENJI
IPC分类号： G01F1/68 , G01F1/684 , G01F1/696 , G01F1/698 , G01F1/72 , G01F15/04
摘要： PROBLEM TO BE SOLVED: To provide a thermal air flow rate measurement device allowing easy sensitiveness and temperature correction in accordance with the fluid flow direction and having high measurement accuracy, its thermal air flow rate meter, an internal combustion engine using it, and a thermal air flow rate measurement method. SOLUTION: This thermal air flow rate measurement device is provided with at least one heating resistor arranged in gas fluid, temperature measuring resistors 211d-211g formed in the upstream part and the downstream part of the heating resistor 211a, an outputting means outputting at least two signals related to a fluid flow rate, a quantizing means quantizing the outputted value, and a computing means 222 computing a flow rate on the basis of the quantized signal. In this thermal air flow rate measurement method, the flow rate and the direction of the fluid are detected on the basis of a signal about a heat generation amount by at least one heating resistor arranged in the gas fluid, a signal concerning a temperature difference between the upstream part and the downstream part of the temperature measuring resistors formed in a plurality of steps in each of the upstream part and the downstream part of the heating resistor, and a signal corresponding to a fluid flow difference other than the temperature difference.

38. 发明专利

JP2001174304A SENSOR WITH BUILT-IN ARITHMETIC DEVICE 失效
公开(公告)号：JP2001174304A
公开(公告)日：2001-06-29
申请号：JP35577699
申请日：1999-12-15
申请人： HITACHI LTD
发明人： OTA KENJI , SUGAYA ATSUSHI
IPC分类号： G01P5/12 , F02D45/00 , G01F1/68 , G01F25/00
摘要： PROBLEM TO BE SOLVED: To provide a sensor with a built-in arithmetic device capable of setting adjustment data taking the error appearing in an adjusting process into consideration when setting a correction constant at the time of adjustment and capable of optimizing the set correction constant with the numeral arithmetic means of the sensor itself. SOLUTION: Correction data from the outside such as a PC(personal computer) are set in a data memory means 400, and the error of the correction data set in the memory means 400 is adjusted only once at a flow point by an adjustment data correcting means 350 via a communication means 330. The flow point adjusted for the error is set in the memory means 400 as a new flow point. The error of the flow calculated by the numeral arithmetic means 300 is estimated from the relation between the flow point of the memory means 400 and the error, and whether the error is in a tolerance or not is judged. If the error is in the tolerance, the adjustment data are set in the memory means 400. If the error is judged to be outside the tolerance, the set flow data are corrected again based on the error and set in the memory means 400 as new adjustment data.

39. 发明专利

JP2000266581A HEATING RESISTOR TYPE AIR FLOW RATE MEASURING INSTRUMENT 失效
公开(公告)号：JP2000266581A
公开(公告)日：2000-09-29
申请号：JP6953899
申请日：1999-03-16
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： OTA KENJI , SUGAYA ATSUSHI , MAKIE YASUO , IGARASHI SHINYA
IPC分类号： G01F1/68
摘要： PROBLEM TO BE SOLVED: To enable an air flow rate measuring instrument to report the abnormality, etc. covering the faulty portion, which occurs in the instrument to the outside by introducing an algorithm which estimates abnormal portions based on analog signals which are fetched for flow rate correction and inputted to an arithmetic device. SOLUTION: An air flow rate sensor 100 is positioned in a suction pipe TB and composed of a heating resistor RH, a temperature-sensitive resistor RC, and a driving circuit. The driving circuit constitutes a bridge circuit together with the temperature- sensitive resistor RC and resistors R1 and R2, and also a feedback circuit which makes a heating current Ih to the heating resistor RH by inputting both-terminal voltages of the resistors R1 and R2 to an operational amplifier OP1. The voltage aVtAfs outputted from the air flow rate sensor circuit 100 when the circuit 100 measures an air flow rate is inputted to a numerical value computing means 300 and corrected by means of a correcting means 310. The corrected results by means of the means 310 are outputted to an ECU as air flow rate correcting signals VtAfs. Since the input voltage to an A/D converter 200 gets out of a normal range when the resistor RH or RC is disconnected, the disconnected portion can be specified from the value of the input voltage.

40. 发明专利

JP2000204986A DIAGNOSTIC DEVICE AND METHOD FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2000204986A
公开(公告)日：2000-07-25
申请号：JP367899
申请日：1999-01-11
申请人： HITACHI LTD
发明人： SUGAYA ATSUSHI , OSUGA MINORU , OTA KENJI
IPC分类号： F02D45/00 , F01L9/04 , F02D13/02 , F02D41/00 , F02D41/18 , F02D41/22
摘要： PROBLEM TO BE SOLVED: To improve the reliability of the control device of an internal combustion engine by diagnosing abnormality on the basis of the back flow rate of the intake valve of the internal combustion engine and the overlap opening time of an intake valve and an exhaust valve. SOLUTION: A combustion chamber 3 is sealed by an intake valve 10, an exhaust valve 11 and an ignition plug 12 mounted on an engine head. The intake air quantity forming the base of the calculation of fuel injection quantity is measured in an air meter 20. A control unit 63 for controlling an engine 1 is provided with a variable valve control means 30 for controlling the operation of variable valve mechanisms 40, 41. The abnormality is diagnosed on the basis of the overlap opening time of the intake valve 10 and the exhaust valve 11 and the back flow time of the intake pipe of the internal combustion engine. The abnormality is diagnosed on the basis of a target EGR quantity of the internal combustion engine and the back flow air mass of the intake pipe of the internal combustion engine. According to this, the diagnosis of abnormality of the variable valve mechanisms can be performed at any time, and the safety of the system can be improved.

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