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1. 发明专利

JPH11237273A STAFF GAUGE AND LEVEL MEASURING APPARATUS USING IT 失效
公开(公告)号：JPH11237273A
公开(公告)日：1999-08-31
申请号：JP3890498
申请日：1998-02-20
申请人： HITACHI LTD , HITACHI PROCESS COMPUTER ENG
发明人： HATA TOSHIO , TAKAGI YOICHI , IKEDA FUTOSHI , YAMAZAWA YUJI
IPC分类号： G01F23/28 , G01C13/00 , G01F23/04 , G06T1/00
摘要： PROBLEM TO BE SOLVED: To obtain a level measuring apparatus by which a level is measured with high accuracy by suppressing the vibration or the deformation of a tilting plate when the image of the tilting plate installed in a level measuring place is imaged so as to find the level on the basis of the image of the tilting plate. SOLUTION: A staff gauge 3 is constituted of at least two columns 4 which are erected and installed in a level measuring place, of tilting plates 5 which are fixed to the columns 4 and which are installed so as to be tilted with reference to the columns 4 and of a plurality of reinforcing materials 6 which fix the two columns 4. The respective reinforcing materials 6 are installed at equal distances in the up-and-down direction. The level contact place of the staff gauge 3 is imaged by an imaging means from a distant place, an imaged image is processed, and a level position is found on the basis of images of the tilting plates 5. Since the columns 4 are reinforced by the plurality of reinforcing materials 6, the deformation or the vibration of the tilting plates 5 is suppressed.

2. 发明专利

JPH11153693A REACTOR POWER CONTROLLER 失效
公开(公告)号：JPH11153693A
公开(公告)日：1999-06-08
申请号：JP32266897
申请日：1997-11-25
申请人： HITACHI LTD
发明人： ARITA SETSUO , MIYAMOTO YOSHIYUKI , FUKAZAWA YUKIHISA , YAMAZAWA YUJI , ISHII YOSHIHIKO
IPC分类号： G21C7/08 , G21C7/26 , G21C17/035 , G21D3/00 , G21D3/08
摘要： PROBLEM TO BE SOLVED: To provide a reactor power controller capable of operating a reactor so that the reactor water level does not reach the alarm point even if a plurality of control rods are simultaneously operated in low power reactor operation. SOLUTION: Control rod operation signal of power controller 1 is input in a control rod driver 2 via a control rod operation judger 9, and reactor 3 power is controlled by control rod operation. The output of the reactor water level meter 4 is input in a control rod operation limiter 22. The set level of reactor water is in the relation, W1>W2>W3>W4, an alarm 'water level high' level WU is higher than W1 and an alarm 'water level low' level WL is lower than W4. When the reactor water level is higher than W1 or lower than W4, a switch 8 is opened and control rod operation is disturbed. When the water level then becomes lower than W2 or higher than W3, control rod operation is restarted.

3. 发明专利

JPH1074109A PLANT OPERATION MONITORING DEVICE 失效
公开(公告)号：JPH1074109A
公开(公告)日：1998-03-17
申请号：JP18622497
申请日：1997-07-11
申请人： HITACHI LTD
发明人： ARITA SETSUO , ITO TETSUO , OGA KOJI , MURATA FUMIO , TOKAWA YUICHI , SATO HIDEYUKI , KUDO MITSURU , YAMAZAWA YUJI
IPC分类号： G09G5/00 , G05B23/02
摘要： PROBLEM TO BE SOLVED: To enable a manager to precisely decide his necessary information according to the plant operation state by showing the system-based alarms on a display monitor panel to recognize an abnormal system and also showing the individual alarms generated in the systems on a display means. SOLUTION: The information shown on the large screen display devices 4A and 4B are monitored by many persons in all operation modes including the start, normal operation, stop and abnormal operation modes of a plant. The proper information is shown every time the information on both display devices are monitored. These shown information are primarily identical with the information on a normal operation mode. The detailed plant information are shown on the CRT display devices 2A to 2G. In other words, a total constitution of the plant is displayed together with the parameter necessary for the plant monitoring. Then a relevant message and the states of important equipments vary in the total plant constitution according to the plant operation state. At the same time, the important parameters are sometimes displayed. These parameters are produced from the plant data and the information on the operation means 3A to 3C.

4. 发明专利

JPS6356104A INTEGRATED TYPE SWITCHBOARD 失效
公开(公告)号：JPS6356104A
公开(公告)日：1988-03-10
申请号：JP19884786
申请日：1986-08-27
申请人： HITACHI LTD
发明人： WATANABE TOSHIJI , YUASA KAZUHIRO , YAMAZAWA YUJI
IPC分类号： H02B1/20 , H02B3/00 , H02B11/04

5. 发明专利

JPS6331476A METHOD AND APPARATUS FOR CONTROLLING PWM INVERTER 失效
公开(公告)号：JPS6331476A
公开(公告)日：1988-02-10
申请号：JP17367086
申请日：1986-07-25
申请人： HITACHI LTD
发明人： MUTO NOBUYOSHI , UEDA AKITERU , SHIMONABE HIDEYUKI , IBORI SATOSHI , HATTORI MOTONOBU , NANTO KENJI , YAMAZAWA YUJI
IPC分类号： H02M7/48 , H02M7/529 , H02M7/5395 , H02P27/08
摘要： PURPOSE:To control with constant torque a PWM inverter at a speed of wide range by judging whether the amplitude ratio of a modulation wave to a carrier exceeds a specified value or not, and obtaining a PWM pulse by an asynchronous type when it is the specified value or lower and by a synchronous type when it is the specified value or higher. CONSTITUTION:A microcomputer 30 generates PWM pulses EU EW, controls a PWM inverter 70 through a gate circuit 60, and drives an induction motor 150. The inverter 70 operates at a frequency (f) set by a variable resistor 101. The signal is input to a timer 20 through a V/f converter 15. A voltage command value VR and a reference value VA are set by variable resistors 102, 103, input to a D/A converter 40, and the signal (g) of a triangular wave generator 130 is compared by comparators 501-503 with a modulation wave (e). When the output voltage is regulated under F/f constant control, an asynchronous type is used in a range that the amplitude ratio is the specified value or smaller, and a synchronous type is used in a range that the ratio is the specified value or larger. Thus, the frequency of the PWM pulse does not become so large that its loss becomes a problem in high frequency.

6. 发明专利

JPS61250552A APPARATUS FOR DISCRIMINATING FLOCCULATION EFFECT OF SUSPENDED SUBSTANCE 失效
公开(公告)号：JPS61250552A
公开(公告)日：1986-11-07
申请号：JP9177085
申请日：1985-04-26
申请人： HITACHI LTD
发明人： BABA KENJI , ISHII JUNICHI , WATANABE SHOJI , NOKITA SHUNSUKE , YODA MIKIO , YAMAZAWA YUJI
IPC分类号： G01N15/00 , G01N29/00 , G01N29/02
摘要： PURPOSE:To accurately measure the state of the suspended particles in a suspension by an on-line system, by allowing an ultrasonic wave to propagate through a liquid and discriminating the flocculation effect of the suspended substance on the basis of the reflected ultrasonic wave from the suspended substance or the signal level of the transmitted ultrasonic wave through the suspension. CONSTITUTION:A timing setting circuit 31 generates a timing signal ST at a constant cycle and a pulse generation circuit 32 generates a pulse signal in synchronous relation to the timing signal ST to apply the same to an ultrasonic transmitting/receiving element 20. This transmitting/receiving element 20 outputs an ultrasonic wave into a suspension 11 upon the reception of the pulse signal. The ultrasonic wave impinged to a suspended substance 12 in the ultrasonic wave propagating through the suspension 11 is partially transmitted through said suspended substance 12 and partially absorbed thereby to be converted to an electric signal. A receiving signal is amplified by an amplifier 33 to be inputted to a detection circuit 34 and the output S01 of said circuit 34 is sent to a flocculation effect discrimination circuit 40 and, when the reflected wave level from the suspended substance 12 is low, it is discriminated that flocculation is well performed and, when the reflected level is high, it is judged that flocculation is insufficient.

7. 发明专利

JPH1172370A METHOD AND APPARATUS FOR MEASURING LIQUID LEVEL AND WATER GAUGE 失效
公开(公告)号：JPH1172370A
公开(公告)日：1999-03-16
申请号：JP32891497
申请日：1997-11-28
申请人： HITACHI LTD , HITACHI PROCESS COMPUTER ENG
发明人： TAKAGI YOICHI , SUZUKI HIROSHI , YODA MIKIO , SAITO TAKESHI , HATA TOSHIO , YAMAZAWA YUJI
IPC分类号： G01F23/04 , G01F23/28 , G06T1/00
摘要： PROBLEM TO BE SOLVED: To enable accurate detection even with a large change in liquid level by picking up from a remote place the image of a water gauge having a plurality of inclined materials fixedly arranged in an up-down direction between two struts erecting at a liquid level measurement place and obtaining a liquid level in the picked-up image from images of the inclined materials. SOLUTION: A liquid level-measuring apparatus comprises a water gauge 1, an image pickup means 4 such as a camera or the like, and a processing device 20 carrying out processing of data of image-processing or the like. The camera 4 picking up an image of a part of the water gauge 1 in touch with a liquid face which is set at a liquid level measurement place is disposed on a preset pan-head 10 and is constituted so that a direction thereof can be adjusted in accordance with a liquid level. The processing device 20 comprises a measuring device main body 2 and a data-processing part 3. The measuring device main body 2 includes an image-processing means 5, a preset operation device 8 sending commands to a camera attitude control device 11 thereby controlling an attitude of the camera 4, etc. The water gauge 1 is constituted of a combination of a vertical water gauge and an inclined plate, with scales marked on the inclined plate.

8. 发明专利

JPH10282288A METHOD AND DEVICE FOR MEASURING REACTOR OUTPUT 失效
公开(公告)号：JPH10282288A
公开(公告)日：1998-10-23
申请号：JP8787297
申请日：1997-04-07
申请人： HITACHI LTD
发明人： ARITA SETSUO , HASEGAWA MAKOTO , ISHII KAZUHIKO , HIRAYAMA TOSHIYUKI , UTENA SHUNSUKE , FUKAZAWA YUKIHISA , MIYAKE MASAO , YAMAZAWA YUJI
IPC分类号： G21C17/108 , G21C17/10
摘要： PROBLEM TO BE SOLVED: To keep the accuracy of sensitivity calibration of neutron detector or of reactor output measurement even if a gamma-ray thermometer fails. SOLUTION: The output signal of a gamma-ray thermometer 4 is compared with a preset judgment value so as to judge whether or not thermometer 4 fails, and a neutron detetcor 5 to be calibrated that is calibrated on the basis of the output signal of the gamma-ray thermometer 4 that is judged defective by the judgment is excluded, and then the reactor output is measured on the basis of the output signal of a neutron detector 5 to be calibrated by a normal gamma-ray thermometer 4, thereby keeping the accuracy of reactor output measurement. On the other hand, the distribution of axial direction output is measured on the basis of the output signal of normal gamma-ray thermometer 4 excluding that of gamma-ray thermometer 4 which is judged defective, or simulation computation for obtaining the distribution of axial direction output according to thermal balance data is corrected so as to keep the measurement accuracy of axial direction output distribution.

9. 发明专利

JPH03192498A PLANT OPERATION MONITORING DEVICE 失效
公开(公告)号：JPH03192498A
公开(公告)日：1991-08-22
申请号：JP33132789
申请日：1989-12-22
申请人： HITACHI LTD
发明人： ARITA SETSUO , ITO TETSUO , OGA KOJI , MURATA FUMIO , TOKAWA YUICHI , SATO HIDEYUKI , KUDO MITSURU , YAMAZAWA YUJI
IPC分类号： G08B23/00 , G05B13/02 , G05B19/409 , G05B23/02 , G09G1/00
摘要： PURPOSE:To suitably present information required for an operator or a manager by displaying plant information required for an operation by the operator on a CRT and displaying plant information, which include the data of a plant to be affected by the operation, on a large scale display device. CONSTITUTION:The information directly required for the operation of the operator are displayed on CRT display device 2A-2G provided on an operation monitor panel 1 and information are displayed on large scale display devices 4A and 4B installed at the back of the operation monitor panel 1 so as to know a relation for grasping the condition of an operated device or a peripheral device equipped with an object to be monitored. Therefore, since the operator effectively uses the information on the large screens and loads feedback to the operation information, the operation is more easily executed and while comprehending the operating condition, a lot of people can comprehend the condition of the entire plant. Thus, reliability is more improved for operating the plant.

10. 发明专利

JPS63276176A DRAWING CONTROLLER 失效
公开(公告)号：JPS63276176A
公开(公告)日：1988-11-14
申请号：JP11057887
申请日：1987-05-08
申请人： HITACHI LTD , HITACHI CONTROL SYST
发明人： TSUTSUI KAZUO , YODA MIKIO , TAKAGI TERUO , MORI SHUNJI , YAMAZAWA YUJI
IPC分类号： G06F17/50 , G06T1/00
摘要： PURPOSE:To easily avoid the overlap of a split-facility drawing and an attribute when they are displayed at one time by moving the attribute display in case an attribute display window overlaps a designated pattern of the split-facility drawing. CONSTITUTION:At the outset, the coordinates of a window reference point under display are retrieved and grasped. The reference point coordinates are coincident with the lower left-reference point A0(X0, Y0) of an attribute display window 104 in a pattern display area 103 as shown in a figure (a). The moving destination reference point A1(X1, Y1) can be movably designated at an optional position via the point A0 with operation of a mouse 207 when a window is moved. An attribute display position is converted into the coordinates of an attribute data display start point within an attribute window 104 in response to the shift of the coordinates of the reference point of the window 104. Then a pattern area of a background pattern part overlapping the window 104 is erased. The window 104 is displayed in the area where the background pattern is erased.

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