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21. 发明专利

JPH1020930A PREVENTIVE MAINTENANCE METHOD 失效
公开(公告)号：JPH1020930A
公开(公告)日：1998-01-23
申请号：JP17456696
申请日：1996-07-04
申请人： HITACHI LTD
发明人： HORI YOSHINARI , SATO YOSHIO , GOTO SATOSHI
IPC分类号： G08G5/00 , G05B23/02
摘要： PROBLEM TO BE SOLVED: To make it possible to specify a model parameter which causes an increase in deviation between a model output value and a measured value by comparing a parameter identified in a normal state and a parameter identified in an abnormal state with each other. SOLUTION: A data preprocessing part 10 of a preventive maintenance device 4 indicates data abnormality if there is abnormality such as deficit data in data which are measured on-line. A parameter identification part 30 identifies model parameters of a dynamo model based on the on-line data whose no abnormality is confirmed by the data preprocessing part 10. A data base 20 is stored previously with model parameters reproducing a state wherein an emergency dynamo is normal. A decision part 40 compares the model parameters identified on the basis of the on-line data with model parameters stored in the data base 20 to detect abnormality of the emergency dynamo. An abnormality cause estimation part 50 estimates the cause of the abnormality of the emergency dynamo if the abnormality is detected.

22. 发明专利

JPH09212077A SIMULATOR FOR TRAINING PLANT OPERATOR 失效
公开(公告)号：JPH09212077A
公开(公告)日：1997-08-15
申请号：JP2000596
申请日：1996-02-06
申请人： HITACHI LTD
发明人： KATAGIRI YUKINORI , NOMURA MASAHIDE , SATO YOSHIO
IPC分类号： G09B9/00 , G06F3/048 , G06F3/14 , G06F17/00 , G06F19/00 , G06Q50/00 , G06Q50/04 , G06Q50/06 , G06Q50/10 , G06Q50/20 , G06Q50/30 , H02J3/00
摘要： PROBLEM TO BE SOLVED: To provide a simulator which enables plant operation trainees to quantitatively recognize the characteristics of a plant and to effectively learn the characteristics of the plant. SOLUTION: This simulator contains an arithmetic means 104 for simulating a plant controller and the main unit of the plant and the trainees learn the characteristics of the plant by using this arithmetic means 40. In such a case, the indices of the stability of the constituting apparatus of at least either of the plant controller and the main unit of the plant are calculated for every apparatus by a plant stability calculating means 107 and the resulted indices of the stability are respectively displayed on a display means 103.

23. 发明专利

JPH09161693A DISPLAY DEVICE FOR CATHODE-RAY TUBE 失效
公开(公告)号：JPH09161693A
公开(公告)日：1997-06-20
申请号：JP31880895
申请日：1995-12-07
申请人： HITACHI LTD
发明人： KOMATSU TAKANORI , SAKURAI SOICHI , JITSUKATA HIROSHI , SATO YOSHIO , YOSHIOKA HIROSHI
IPC分类号： H01J29/00 , H01J29/76 , H04N9/29
摘要： PROBLEM TO BE SOLVED: To efficiently lower the spurious radiation magnetic field by generating an offset magnetic field opposite to the strongest position of the spurious radiation magnetic field, which is generated by the leaked magnetic field from a deflection yoke. SOLUTION: An in-space magnetic field surrounded by a vertical deflecting coil 2 effectively works as a vertical deflecting magnetic field, but at the same time, this magnetic field is leaked outside so as to generate a spurious radiation magnetic field. Cancel coils 4c, 4d are arranged close to each other opposite to the strongest position of the spurious radiation magnetic field, for example, a space 23 between an opening side fringe 21 and a magnetic core 2 and connected in series or in parallel to/with a coil 2 so as to generate the magnetic field in the opposite direction. The spurious radiation magnetic field by the leaked magnetic field from the coil 2 can be efficiently lowered by arranging the coils 4c, 4d at the strongest position of the spurious radiation magnetic field on a line in parallel with a core 3 between an opening side tip and a neck side tip of a deflection yoke 1.

24. 发明专利

JPH0991121A INITIALIZING METHOD 失效
公开(公告)号：JPH0991121A
公开(公告)日：1997-04-04
申请号：JP25110295
申请日：1995-09-28
申请人： NEC CORP , NIPPON TELEGRAPH & TELEPHONE , HITACHI LTD , OKI ELECTRIC IND CO LTD , FUJITSU LTD
发明人： JINNO KIMIHIDE , MISU KENJI , SATO YOSHIO , YUASA YUICHI , IYAMA HIROYUKI , HIGAKI NORITOSHI , ICHIKAWA HIDEHIKO , UJIHARA KAZUTO , YAMASHITA KEI , WATABE SHINICHI , INOUE TAMOTSU , FUTAI HIDEKI
IPC分类号： G06F13/14 , G06F9/06 , G06F11/00
摘要： PROBLEM TO BE SOLVED: To speedily and surely recover into the latest state when any abnormal operation such as processing conflict is generated. SOLUTION: When managing information is updated with the increase of subscribers, etc., the contents of a managing information setting area 1a are updated corresponding to that updating and new information 3 is added. At the same time, a managing information storage part 2a is updated corresponding to those contents as well and the new information 3 is added. When performing initial setting because of the processing conflict of a program in a software 1, the managing information stored in the managing information storage part 2a is used.

25. 发明专利

JPH08100449A WATER SUPPLY DEVICE FOR BUILDING 失效
公开(公告)号：JPH08100449A
公开(公告)日：1996-04-16
申请号：JP23692194
申请日：1994-09-30
申请人： HITACHI BUILDING SYST ENG , HITACHI LTD
发明人： MATSUI TAKAYUKI , KANEKO TAKASHI , SATO YOSHIO , HIDA HIDEYUKI
IPC分类号： E03B11/00
摘要： PURPOSE: To provide a water supply device for a building capable of easily feeding fresh water without using a water receiving tank. CONSTITUTION: The lower story side of a lifting pipe 5 is connected to a water service pipe via a booster pump 4, the lifting pipe 5 is erected, the upper story side of a feeding pipe 7 is connected to the upper story side of the lifting pipe 5, and water is fed via the feeding pipe 7. The same pressure characteristic can be obtained as that of the feeding pipe 7 of the water feeding device of a building feeding water with a water receiving tank and an elevated water tank.

26. 发明专利

JPH07167402A AUTOMATIC CONTROLLER FOR THERMAL POWER PLANT 失效
公开(公告)号：JPH07167402A
公开(公告)日：1995-07-04
申请号：JP31640793
申请日：1993-12-16
申请人： HITACHI LTD
发明人： OUCHI KAZUNORI , NOMURA MASAHIDE , SATO YOSHIO , SUGANO AKIRA , TOYAMA EIJI , YOKOGAWA ATSUSHI
IPC分类号： F22B35/00 , G05B13/02
摘要： PURPOSE:To automatically regulate a dynamic precedence control parameter of a thermal power plant automatic controller for controlling a thermal power plant having nonlinear dynamic characteristics for a load state, etc. CONSTITUTION:An automatic controller for a thermal power plant comprises a function 8 for detecting a load state, a function 5 for calculating a control parameter for deciding a dynamic precedence control signal for correcting an input amount of the plant from features of a waveform of a control amount output in each load state, and functions 6, 7 for forming a function for defining corresponding relationship between a detected load state and calculated control parameter. Further, the controller comprises means 3, 4 for outputting the precedence control signal for correcting the input amount of the plant by using the calculated control parameter for the load state from the formed function, thereby optimally regulating the control parameter. Thus, a variation in a control amount such as a main steam temperature, etc., can be suppressed to a minimum limit at the time of changing a load command signal and at the time of starting or stopping.

27. 发明专利

JPH076383A OPTICAL DISK AND METHOD AND DEVICE FOR DETECTING OUT-OF-FOCUS 失效
公开(公告)号：JPH076383A
公开(公告)日：1995-01-10
申请号：JP14327093
申请日：1993-06-15
申请人： HITACHI LTD
发明人： TSUBOI NOBUYOSHI , MINEMURA HIROYUKI , SUGITA TATSUYA , SATO YOSHIO , FUSHIMI TETSUYA , YASUKAWA SABURO , TSUNODA YOSHITO
IPC分类号： G11B7/09 , G11B7/24 , G11B11/10 , G11B11/105
摘要： PURPOSE:To make an optical head and an optical disk device small in size and light in weight by providing a reflection surface for detecting focus at a position where the focal distance of an objective lens from a reflection surface for recording and reproducing is different. CONSTITUTION:A sample servo system clock pit 354 and a pit for detecting focus 358 are provided on a disk 300. Light condensed by the objective lens 108 is converged to the size equal to the diameter of the pit 354. The surface of the pit 354 is separated from the surface of the pit 358 by (h), and a condensed beam diameter is a little larger on the surface of the pit 358. When the disk 300 is irradiated with the light condensed by the objective lens 108, an RF signal on the reflection surface where the pit is not provided becomes RF1, reflection from the clock pit becomes RF2 and reflection from the pit 358 for detecting out-of-focus becomes RF3.

28. 发明专利

JPH06323165A CONTROL DEVICE AND METHOD FOR GAS TURBINE 失效
公开(公告)号：JPH06323165A
公开(公告)日：1994-11-22
申请号：JP11495993
申请日：1993-05-17
申请人： HITACHI LTD
发明人： OYAMA TAKASHIGE , NISHIMURA YUTAKA , SATO YOSHIO , NISHIHARA MOTOHISA , AZUHATA SHIGERU , ITO KAZUYUKI
IPC分类号： F02C9/28 , F23R3/26 , F23R3/30 , F23R3/34
摘要： PURPOSE:To provide a control device for a gas turbine for properly controlling air-fuel ratio in accordance with a combustion condition so that emission of nitrogen oxide can be reduced. CONSTITUTION:In a gas turbine wherein air flow control valves 10, 12 for controlling a flow amount of combustion air are interposed in an air flow path from a compressor 1 to the gas turbine 2, air flow sensors 30, 34, 35 are arranged in the vicinity of each air flow control valve, and based on a signal from the sensors, openings of fuel amount adjusting valves 18 to 22 and air flow control valves 10, 12 are adjusted to control air-fuel ratio in a combustion part. Accordingly, by directly and high accurately detecting a combustion air amount in the gas turbine combustion part by the flow sensor arranged in the vicinity of each air flow control valve 11, since the air-fuel ratio in the combustion part is controlled to be based on an actually measured value of the sensor, the air-fuel ratio can be set to a large value in the vicinity of a limit value of air-fuel ratio, and emission of nitrogen oxide can be reduced without causing a misfire and after burn.

29. 发明专利

JPH06295471A OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH06295471A
公开(公告)日：1994-10-21
申请号：JP8332793
申请日：1993-04-09
申请人： HITACHI LTD
发明人： NARUSE ATSUKO , MAEDA YOSHIHIRA , MINEMURA HIROYUKI , NAGAI SHOICHI , IKUTA ISAO , KATO YOSHIMI , ANDO HISASHI , SATO YOSHIO
IPC分类号： G11B7/258 , G11B7/24
摘要： PURPOSE:To provide an optical recording medium having high reflectance and high S/N and ensuring easy control of its optical constant and heat distribution. CONSTITUTION:A dielectric layer 2, a recording layer 3 and a dielectric layer 4 are successively laminated on a substrate 1. The dielectric layer 4 is a metal dispersed dielectric layer 4 contg. fine metal particles having high reflectance and satisfactory heat conductivity. Since the fine metal particles having high reflectance are added, light reflected from the resulting optical recording medium can be increased. In the case of a conventional optical recording medium, a reflecting layer of only a metal is formed without imparting reflecting function to a dielectric layer. The objective optical recording medium having high S/N is provided because the number of the laminated layers is smaller than that of the layers of the conventional optical recording medium.

30. 发明专利

JPH06187723A THIN OPTICAL INFORMATION PROCESSOR 失效
公开(公告)号：JPH06187723A
公开(公告)日：1994-07-08
申请号：JP33835492
申请日：1992-12-18
申请人： HITACHI LTD
发明人： TSUBOI NOBUYOSHI , MINEMURA HIROYUKI , SUGITA TATSUYA , SATO YOSHIO , FUSHIMI TETSUYA , YASUKAWA SABURO , SHIBANUMA HIDEO
IPC分类号： G11B7/00 , G11B7/004 , G11B19/20 , G11B23/00 , G11B23/03
摘要： PURPOSE:To obtain the information processor with superior portability and high reliability by its thin formation and miniaturization by making a structure capable of suppressing eccentricity of an optical disk less than a prescribed value. CONSTITUTION:A thin-optical disk device consists of an optical disk substrate 140, a cartridge 142, one part 144 of an outer wall of the disk device main body, a hub 149, an optical head 200, an objective lens 219, a spindle motor 244 and its spindle 242. In this device, for suppressing the eccentricity of the optical disk 140 to be

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