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1. 发明专利

JPH07251252A METHOD FOR CONTROLLING MOLTEN METAL SURFACE LEVEL IN TWIN BELT TYPE CONTINUOUS CASTER 失效
公开(公告)号：JPH07251252A
公开(公告)日：1995-10-03
申请号：JP4440194
申请日：1994-03-15
申请人： NIPPON STEEL CORP
发明人： TANAKA KEIHACHIRO , ARAKI MASAYUKI , SADAKI ATSUSHI , SUNAKAWA AKIRA
IPC分类号： B22D11/16 , B22D11/06 , B22D11/18 , G05D9/12
摘要： PURPOSE:To hold the suitable molten metal surface level by rest-raining molten metal surface vibration caused by standing wave of the molten metal surface in the inner part of a mold of a twin belt type continuous caster. CONSTITUTION:The molten metal surface levels near the pouring positions of pouring nozzles arranged on both sides in the longitudinal direction of the mold are respectively measured and high frequency component contained in the measured signal is removed with a low-pass filter to detect the molten metal surface levels. A state variable vector is estimated from a state variable equation made by fitting beforehand the actual casting data to a multidimensional stationary time series autoregressive model and a state variable estimation calculating equation model made based on the model equation. Feedback is executed to the estimated value of this state variable vector and both the detected molten metal surface levels, and the set opening degree of an opening degree adjusting means of sliding nozzle, etc., arranged on the way of the pouring nozzle is calculated and decided from the calculating equation model decided according to a linear optional multivariable control theory utilizing the secondary criterion for evaluation.

2. 发明专利

JP2003320237A Method for adjusting mixing ratio of high-viscousity fluid into low viscous fluid 审中-公开
标题翻译：用于调节高粘度流体混合比低粘度流体的方法
公开(公告)号：JP2003320237A
公开(公告)日：2003-11-11
申请号：JP2002131088
申请日：2002-05-07
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： INOUE MASAMUNE , SUNAKAWA AKIRA
IPC分类号： B01F3/08 , B01F5/04 , B01F15/04 , B01J4/00 , C10B27/00 , C10B41/08
摘要： PROBLEM TO BE SOLVED: To solve the problem that high-viscousity coal tar causes a trouble in controllability when the coal tar is mixed into cleaning ammonia water used for cooling coke-oven gas, and mixing of a small quantity of coal tar into the cleaning ammonia water is especially difficult, in a method for mixing high-viscousity fluid into low viscous fluid.
SOLUTION: In a method for mixing the low-viscousity fluid to the high- viscousity fluid in a flow passage 3 installed in a mixing adjustment nozzle and adjusting the mixing ratio of the high-viscousity fluid, the low-viscousity fluid is supplied from the upstream side of the mixing adjustment nozzle and discharged from the downstream side through the flow passage 3. When the high-viscousity fluid is introduced at a constant pressure into the flow passage on the downstream side of a low-viscousity fluid supplying position, the flow rate of the low-viscousity fluid is controlled, thereby the quantity of the high- viscousity fluid introduced into the flow passage is controlled.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：为了解决当煤焦油混合到用于冷却焦炉煤气的清洁氨水中时，高粘度煤焦油引起控制性问题的问题，以及少量煤焦油的混合在将高粘度流体混入低粘度流体的方法中，进入清洗氨水尤为困难。解决方案：在将低粘度流体与安装在混合调节喷嘴中的流路3中的高粘度流体混合并调节高粘度流体的混合比的方法中，低粘度流体是从混合调节喷嘴的上游侧供给并通过流路3从下游侧排出。当高粘性流体以恒定压力引入到低粘度流体供给位置的下游侧的流路中时控制低粘度流体的流量，从而控制引入流路的高粘度流体的量。版权所有（C）2004，JPO

3. 发明专利

JPH06137921A METHOD FOR DETECTING MOLTEN METAL LEVEL 失效
公开(公告)号：JPH06137921A
公开(公告)日：1994-05-20
申请号：JP28728992
申请日：1992-10-26
申请人： NIPPON STEEL CORP
发明人： SADAKI ATSUSHI , TANAKA KEIHACHIRO , MOTOMURA MASAKI , TOKUDA ATSUHIRO , MORIKAGE TSUZUKU , SUNAKAWA AKIRA
IPC分类号： G01F23/26
摘要： PURPOSE:To restrain discontinuity due to switching of detector by disposing a plurality of sets of detectors while overlapping the detection ranges, at the fringe regions thereof, in the direction of level variation of molten metal thereby correcting aging of the detector on-line. CONSTITUTION:A detector comprises transmission coils 4a-4e, receiving coils 7a-7e, BPFs 8a-8e, synchronous rectifiers 9a-9e, and LPFs 10a-10e. If molten metal 1 is filled between the transmission coil 4a and the receiving coil 7a, eddy current is induced in the molten metal 1 by a part of alternating flux transmitted through a mold 2 when the flux passes through the molten metal 1. In this regard, voltage induced in the transmission coil 7a corresponds to the molten metal level filled between the coils 4a, 7a. In order to detect molten level range corresponding to the output voltage of a detector on the low molten level side basing on the output voltage of a detector on the high molten level side between adjacent detectors, respective measuring ranges are overlapped at the fringe regions thereof.

4. 发明专利

JPH06126392A METHOD FOR CONTROLLING MOLTEN METAL SURFACE LEVEL IN TWIN BELT CONTINUOUS CASTING 失效
公开(公告)号：JPH06126392A
公开(公告)日：1994-05-10
申请号：JP27966792
申请日：1992-10-19
申请人： NIPPON STEEL CORP
发明人： SADAKI ATSUSHI , TANAKA KEIHACHIRO , TOKUDA ATSUHIRO , MORIKAGE TSUZUKU , SUNAKAWA AKIRA
IPC分类号： B22D11/06 , B22D11/18 , G05B11/42 , G05D9/12
摘要： PURPOSE:To improve the quality and the yield of a product by measuring molten metal surface level at different positions, calculating a command value from the average level, level difference and level aimed value of the molten metal surface level and executing the molten metal surface level control. CONSTITUTION:The molten metal surface level is measured at two or more different positions. The average level and the level difference are calculated through a modal filter from the molten metal surface level measured values at two positions. A main molten metal pouring rate command value in each nozzle is calculated from the molten metal surface level aimed value and the molten metal surface average level. An auxiliary molten metal pouring rate command value in each nozzle is calculated from the molten metal surface level difference. The molten metal pouring rate command value is calculated from the main molten metal pouring rate command value and the auxiliary molten metal pouring rate command value, and outputted to each molten metal pouring rate operating device. The disturbance is compensated and the vibration of the molten metal surface can be restrained.

5. 发明专利

JPH11240687A CRANE ANTI-SWAY MOVEMENT CONTROL SYSTEM 失效
公开(公告)号：JPH11240687A
公开(公告)日：1999-09-07
申请号：JP4577598
申请日：1998-02-26
申请人： NIPPON STEEL CORP
发明人： TOKUDA ATSUHIRO , SUNAKAWA AKIRA , HIMENO BUNICHI , ISHIDA MASAHIRO
IPC分类号： B66C13/22
摘要： PROBLEM TO BE SOLVED: To enable the anti-sway movement of a crane without being affected by higher-mode vibrations that are often seen especially in a tongs crane. SOLUTION: On the basis of a target carne position xref calculated from a target crane moving distance D and of an actual crane position (x), a position control part 24 computes a value Pref , which is compared with a feedback(FB) value P and converted into a target crane velocity Vref for use in the velocity control of a crane. The actual crane position (x) and crane acceleration V are detected by sensors 26 and 27 respectively and are then fed back into an FB value arithmetic and logic part 29. The crane acceleration V is also fed back into a simulation part 28 where it is used for the calculation of a rope sway angle and a rope sway angular velocity, which are both passed to the FB value arithmetic and logic part 29. The FB value arithmetic and logic part 29 computes such an FB value P as a linearly combined value of the position, velocity, sway angle, and sway angular velocity.

6. 发明专利

JPH08145762A MOLTEN METAL LEVEL MEASURING METHOD IN TWIN BELT TYPE CONTINUOUS CASTING MACHINE 失效
公开(公告)号：JPH08145762A
公开(公告)日：1996-06-07
申请号：JP28788394
申请日：1994-11-22
申请人： NIPPON STEEL CORP
发明人： ARAKI MASAYUKI , TANAKA KEIHACHIRO , SADAKI ATSUSHI , TOKUDA ATSUHIRO , MORIKAGE TSUZUKI , SUNAKAWA AKIRA
IPC分类号： G01F23/00 , B22D11/06 , B22D11/16 , G01F23/26
摘要： PURPOSE: To stably measure the behavior of a molten metal level by setting the respective measuring frequencies of plural pairs of molten metal level sensors to the area excluding the interference frequency range of harmonic wave of a commercial power source frequency within a specified range, and relatively differing it from the measuring frequency of the adjacent sensor. CONSTITUTION: When a current having a fixed measuring frequency and a fixed amplitude is supplied from a transmitter 31 to a transmission coil 41 , the coil 41 generates a magnetic flux of a fixed frequency. The magnetic flux passes through a metal belt 1 and a molten metal 2, and reaches a receiving coil 51 . The coil 51 generates a dielectric voltage corresponding to the intensity of the magnetic flux. A noise is removed by BPF 61 , the signal from a filler 63 through a phase wave detector 71 is converted into a DC voltage corresponding to the molten metal level, and outputted to a computer 10 after AC noise is removed by a LPF 81 . As the setting range of measuring frequency of the molten metal level sensor, the range of 200-900Hz where the detecting sensitivity is improved is used. In the setting range of a power source frequency in which the influence of harmonic noise is removed, it is determined so that the distance from the adjacent frequency is maximum.

7. 发明专利

JP2000007274A MOVEMENT CONTROL DEVICE FOR BRACING OF CRANE 失效
公开(公告)号：JP2000007274A
公开(公告)日：2000-01-11
申请号：JP17886098
申请日：1998-06-25
申请人： NIPPON STEEL CORP
发明人： TOKUDA ATSUHIRO , SUNAKAWA AKIRA , ISHIDA MASAHIRO
IPC分类号： B66C13/22 , G05B13/02 , G05B13/04
摘要： PROBLEM TO BE SOLVED: To provide a movement control device for bracing of a crane, capable of controlling vibration in a secondary mode and having robust performance in response to the change of a rope length and a slab weight. SOLUTION: A Pref is calculated at a position control part 24 from a target position Xref calculated in accordance with a target movement amount D and an actual position (x). A deviation between the Pref and the output P of a feedback amount calculation part 28 is used for a target speed Vref to control the running speed of a crane. The position (x) and speed (v) of the crane and the oscillating angle θ and oscillating angle speed ω of a rope are respectively detected by sensors 261-4, multiplied by gains with gains 271-4 and added at the feedback amount calculation part. The gains are not only optimum feedback gains to the reference model of the crane but also gains having robust performance in response to the change of a rope length and a slab weight.

8. 发明专利

JPH09122863A METHOD FOR CONTROLLING MOLTEN METAL SURFACE LEVEL IN CONTINUOUS CASTER FOR THIN CAST SLAB 失效
公开(公告)号：JPH09122863A
公开(公告)日：1997-05-13
申请号：JP30225995
申请日：1995-10-27
申请人： NIPPON STEEL CORP
发明人： SUNAKAWA AKIRA , TOKUDA ATSUHIRO , MORI KAGETSUGU
IPC分类号： B22D11/08 , B22D11/06 , B22D11/18 , G05D9/12
摘要： PROBLEM TO BE SOLVED: To provide a control method of a stable molten metal surface at the initial stage of casting by changing a control pattern of the molten metal surface level in accordance with starting condition. SOLUTION: An operation part 8 inputs the molten steel surface level L from a molten steel surface level decision part 6 and also, starts the count of time. The molten steel surface level L is compared with a control starting level, target level Lh at the initial stage, control starting time and forcedly control starting time previously inputted from a setting part S. When the molten steel surface level L reaches the target level Lh at the initial stage within the control starting time, an opening degree adjusting quantity Ka of opening degree adjusting mechanism 3 is obtd. as the molten steel supplying rate and inputted into a driving controller 7. When the molten steel surface level L does not reach the target level Lh at the initial stage within the control starting time, but reaches the control starting level L1 before the forcedly control starting time, the opening degree adjusting mechanism 3 is adjusted in accordance with a prepared ramp state control target level. When the molten steel surface level L does not reach the control starting level L1 even at the time of coming to the forcedly control starting time, the whole closing signal of the nozzle 10 is outputted to the opening degree adjusting mechanism 3 to stop the casting.

9. 发明专利

JPH0868682A MOLTEN METAL LEVEL MEASURING METHOD FOR TWIN BELT CONTINUOUS CASTING MACHINE 失效
公开(公告)号：JPH0868682A
公开(公告)日：1996-03-12
申请号：JP20757294
申请日：1994-08-31
申请人： NIPPON STEEL CORP
发明人： ARAKI MASAYUKI , SUNAKAWA AKIRA
IPC分类号： G01F23/00 , B22D11/06 , B22D11/16 , G01F23/26
摘要： PURPOSE: To sustain a stabilized accurate measurement of molten metal level automatically by previously storing a calibration function at each y position of short side such that a switching can be made to a new calibration function immediately upon alteration of the y position of short side. CONSTITUTION: Calibration functions corresponding to previously classified set y positions of short side are stored in files W1 -Wn . When the width of a casting piece is altered according to the purpose of operation, a signal representative of altered y position of short side is delivered, in place of the signal prevailing prior to alteration, to an operating unit 15. In response to the alteration signal, the operating unit 15 switches the calibration function, being employed for converting the output voltage from a sensor pair 4 into a molten metal level signal, to that (stored in one of W1 -Wn ) corresponding to the altered y position of short side. Subsequently, output voltage from the sensor pair 4 is converted into the molten level signal based on the switched calibration function and delivered until another alteration signal arrives.

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