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1. 发明专利

JPH08312304A SERVO GUARD FOR DIGITAL CONTROLLING DEVICE 失效
公开(公告)号：JPH08312304A
公开(公告)日：1996-11-26
申请号：JP11315695
申请日：1995-05-11
申请人： MITSUBISHI HEAVY IND LTD
发明人： ISHIGURO MASAAKI , EMOTO HIDEAKI , YAMAGUCHI TOMOHIRO
IPC分类号： F01D25/00 , F01D17/24 , F02C9/00 , G05B23/02
摘要： PURPOSE: To double a servo guard without providing an outside selection circuit by switching analog signal output to be valid and invalid using the result of self-diagnosis by means of a diagnosis means and the selection signal input from the outside. CONSTITUTION: An actual control valve opening degree signal 11 is inputted as a signal for feed back and actual opening data 11 and 19 are sent to a CPU through a digital path. At this moment, an analog signal 27 for controlling a control valve based on the valve opening command signal sent from a CPU through a digital path is made to be switched to be valid and invalid using the result of self-diagnosis by means of diagnosis means 14-18, 20-26, and 28-30 having a self-diagnosis function and the selection signal input from the outside. This constitution makes it unnecessary to make a D/A or A/D converter intervene between the CPU and a servo guard body and makes it possible to analysis the cause in a short time when a trouble occurs due to a satisfactory self- diagnosis function.

2. 发明专利

JPH0478881B2 失效
公开(公告)号：JPH0478881B2
公开(公告)日：1992-12-14
申请号：JP6122784
申请日：1984-03-30
申请人： MITSUBISHI HEAVY IND LTD
发明人： HIRATA DAISAKU , ISHIGURO MASAAKI
IPC分类号： F22B1/18 , F22B35/00 , G05B7/02 , G05D16/00

3. 发明专利

JPH04299098A CONTROL METHOD FOR COMBINED CYCLE POWER PLANT 失效
公开(公告)号：JPH04299098A
公开(公告)日：1992-10-22
申请号：JP6168191
申请日：1991-03-26
申请人： MITSUBISHI HEAVY IND LTD
发明人： KAMIDATE FUMIO , HASEGAWA TOSHIHARU , ISHIGURO MASAAKI
IPC分类号： H02J3/38 , H02J3/46 , H02P9/00
摘要： PURPOSE:To prevent total stoppage or overload operation of plant by monitoring in-yard or regional independent operating condition of combined power plant and operating only one selected gas turbine generator and stopping operation of other remaining gas turbine generators. CONSTITUTION:A monitor switch 3 turns its own output ON when an output signal 1 of gas turbine generator is higher than 30% of the rating thereof. A monitor switch 4 turns its output ON when an input signal is lower than 10% of the rated output of gas turbine generator. Upon turn OFF of the input signal, an OFF delay timer 5 sustains ON output for 5sec and then turns the output OFF. Upon turn ON of the input signal, an ON delay timer 6 sustains OFF output for 0.5sec and then turns the output ON. When all inputs to an AND 7 are turned ON, output therefrom is turned ON thus turning a gas turbine generator output abrupt decrease signal 8 ON.

4. 发明专利

JPS61215408A STEAM TURBINE CONTROLLING EQUIPMENT 失效
公开(公告)号：JPS61215408A
公开(公告)日：1986-09-25
申请号：JP5653985
申请日：1985-03-20
申请人： MITSUBISHI HEAVY IND LTD
发明人： KAMIDATE FUMIO , HIRATA DAISAKU , ISHIGURO MASAAKI
IPC分类号： F01K23/10
摘要： PURPOSE:To restrict a sudden steam pressure drop, in a steam turbine driven by the steam generated by means of waste heat from a gas turbine, by closing a steam control valve related to the said steam turbine, according to the amount of the pressure drop, when the front steam pressure of the valve drops. CONSTITUTION:When the operation of either one of steam generators 3a-3c in a combined plant is suspended and when the amount of steam supplied to a steam turbine 8 decreases, the value of a steam pressure measured with a measuring instrument 21, which detects the front steam pressure of a steam control valve 7, also decreases. Then, the output from a subtracter 22, which calculates a difference between said measured value and the value, whose rate of change was restricted to a predetermined value by a rate-of change-limiter 23, turns from zero to a positive signal, while a negative signal is output from the first function generator 24 when the input from the subtracter 22 exceeds the predetermined value. Next, the negative signal, which becomes smaller in accordance with both reduced amount in input and reduced speed, is output from a proportional differential controller 29. According to this negative signal, the steam control valve 7 is closed.

5. 发明专利

JPS60207802A CONTROLLER FOR STEAM PRESSURE 失效
公开(公告)号：JPS60207802A
公开(公告)日：1985-10-19
申请号：JP6122784
申请日：1984-03-30
申请人： MITSUBISHI HEAVY IND LTD
发明人： HIRATA DAISAKU , ISHIGURO MASAAKI
IPC分类号： F22B1/18 , F22B35/00 , G05B7/02 , G05D16/00

6. 发明专利

JPS63293601A PROPORTION CONTROLLER 失效
公开(公告)号：JPS63293601A
公开(公告)日：1988-11-30
申请号：JP12845987
申请日：1987-05-27
申请人： MITSUBISHI HEAVY IND LTD
发明人： ISHIGURO MASAAKI , TODA KATSUHIKO
IPC分类号： G05B7/02
摘要： PURPOSE:To improve the controllability of a proportion controller by providing a divider and an adder between the changing rate limiters set at the output input sides of a changeover switch respectively. CONSTITUTION:A proportion controller, e.g., a rotational frequency controller for steam turbine consists of a changing rate limiter 25, a deviation computing element 26, proportion computing element 27, an analog memory 29, a changeover switch 30, etc. This controller receives the input of the real rotational frequency 21, the target rotational frequency, etc., of the steam turbine and transmits an operation output signal 32 is steam control valve. In this case, a divider 31 and an adder 33 are added. In a manual operation, the signal 32 is divided by the value of the setter 28 at the divider 31 and the added with the frequency 21 at the adder 33. The result of the these operations is supplied to the limiter 25 set at the input side. As a result, no sudden change is produced even when the manual operation is switched to an automatic operation since the set rotation frequency of the turbine is equal to the output of the limiter 25 of the input side.

7. 发明专利

JPH10222203A DIGITAL CONTROLLER 失效
公开(公告)号：JPH10222203A
公开(公告)日：1998-08-21
申请号：JP2641097
申请日：1997-02-10
申请人： MITSUBISHI HEAVY IND LTD
发明人： ISHIGURO MASAAKI , YAMAGUCHI TOMOHIRO
IPC分类号： G05B11/36 , G05B9/03 , G05B15/02 , G05B19/05
摘要： PROBLEM TO BE SOLVED: To duplex a servo card, to exchange the card during an operation and to improve reliability in a digital controller controlling the control valve of a power generation plant and the like. SOLUTION: The servo cards 31a and 31b are connected to the control valve 5 by duplexing them. Opening degree commands (S1a and S1b) from CPU 50 are inputted through a computer bus 14, are D/A-converted inside and are proportionally operated in proportional computing elements 1a and 1b. When switch circuits 4a and 4b are turned off, the command signals are outputted to the control valve 5. An external logic circuit 51 drives either a signal generator 7a or 7b. Either the switch circuit 4a or 4b is turned off by the signal and the control valve 5 is driven. The external logic circuit 51 drives the signal generator of the other servo card so that it is turned on when the servo card during the operation failure and the card which fails is turned off. The normal card is driven from the card during the failure. Then, 32 and 33 are connectors and the card can be exchanged when it fails.

8. 发明专利

JPH0660279A CRT OPERATION DEVICE 失效
公开(公告)号：JPH0660279A
公开(公告)日：1994-03-04
申请号：JP20910792
申请日：1992-08-05
申请人： MITSUBISHI HEAVY IND LTD
发明人： ISHIGURO MASAAKI , TAGUCHI IKUYO , NATSUME AKINORI , IKEDA NAOTO , KAWACHI MOTOKO
IPC分类号： G06F1/00 , G08B23/00 , G09G5/00 , G09G5/08 , H02B15/00
摘要： PURPOSE:To improve operability of a function designation switch, and to facilitate enlargement, reduction, movement, etc., of a time axis or a display value axis of a trend graph. CONSTITUTION:In a display of a real time or historical trend graph, together with an area 3, etc., for displaying a real trend graph 1, a scale 2, a name of a line of the trend graph 1, an engineering value, etc., on a screen, an enlargement/reduction key image 5 in which plural keys are arrayed crosswise, and a moving operation key image 6 are displayed. In the enlargement/reduction key image 6, key images of 'standard', 'X reduction' and 'X enlargement', and 'Y enlargement' and 'Y reduction' are arrayed in the center, in the left and the right, and in the upper and the lower parts, respectively. In the moving operation key image 6, key images of 'standard', 'left movement' and 'right movement', and 'upward movement' and 'downward movement' are arrayed in the center, in its left and right, and in the upper and the lower parts, respectively. Also, an input operation can be executed directly to the display image.

9. 发明专利

JPH05334063A 失效
公开(公告)号：JPH05334063A
公开(公告)日：1993-12-17
申请号：JP13946392
申请日：1992-05-29
申请人： MITSUBISHI HEAVY IND LTD
发明人： ISHIGURO MASAAKI , SATO TERUMI , FUTAMURA ATSUSHI
IPC分类号： B43L13/00 , G06F9/06 , G06F17/50 , G06F15/60
摘要： PURPOSE:To attain the reduction of man-hours required for a data input operation in CAD work by using control data generated by a maintenance tool for digital controller in the generation of a similar control block diagram in a CAD system as it is. CONSTITUTION:The control data is generated by the maintenance tool 1 for digital controller, and also, signal name data is generated, and they are stored in a medium 5 for data transfer, and are inputted to a computer system 2 for CAD via an input device 3. The computer system 2 converts the control data and the signal name data from the input device 3 to plot data, respectively, and outputs them to a graphic terminal 4. The graphic terminal 4 obtains the same control block diagram as that obtained on the CRT screen of the maintenance tool 1 by the plot data from the computer system 2, and also, generates the control block diagram 6 as a whole by applying the post script of control logic outside the digital controller, etc., by performing general plot processing.

10. 发明专利

JPH04168479A METHOD FOR SWITCHING FACEPLATE OF CRT CONTROL PANEL 失效
公开(公告)号：JPH04168479A
公开(公告)日：1992-06-16
申请号：JP29639390
申请日：1990-11-01
申请人： MITSUBISHI HEAVY IND LTD
发明人： KAMIDATE FUMIO , ISHIGURO MASAAKI , TANAKA SATOSHI
IPC分类号： G09G5/00
摘要： PURPOSE:To simplify key operation, in which pushing is repeated many times to obtain an objective faceplate, by setting a page, which is to be switched for display when an operation key corresponding to each system is operated first, at any page for registration. CONSTITUTION:When an operator pushes a faceplate display key and the faceplate is displayed, this faceplate is compared with the last faceplate, which is displayed by pushing the key last time, and when they are the same, the faceplate at the page next to the faceplate, which is displayed in a CRT display at this stage, is displayed. In the different case, the initial page, which is registered at this stage, is read out from an initial page registering memory 19 to check that the faceplate exists in the initial page of the operated key, and in the case of YES, this faceplate is displayed, and in the case of NO, the faceplate of the first page is displayed. When the initial page is set at five and the described key is operated, the fifth page, namely, an objective faceplate of the fifth system is displayed with one time key operation. The faceplate related to a system which is operated at this stage is displayed by pushing a key.

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