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1. 发明专利

JPS644973A GAP CONTROL SYSTEM FOR DISK CONTROLLER 失效
公开(公告)号：JPS644973A
公开(公告)日：1989-01-10
申请号：JP15776087
申请日：1987-06-26
申请人： HITACHI LTD , HITACHI COMPUTER ELECTRONIC
发明人： HOASHI KOUICHI , NODA AKIRA
IPC分类号： G11B20/12
摘要： PURPOSE:To suppress the increase of a hardware quantity without lowering the performance of a device, by performing variable length gap count control where the counting of a gap are performed in two stages, the integer times part and the remainder part of the segment length of the gap, by a gap counter. CONSTITUTION:In a format where fields 1, 2... are segmented, the gap length of the gaps GAP1, 2... are expressed as [segment length X (N+M)]. By using the value of N as the parameter of the gap length, the control of the gap length is performed by counting the part of (segment length X N) by a segment counting part 32 in the gap counter, and following that, counting the part of a constant M decided by the class of the field. In such a way, it is possible to suppress the quantity of hardware and to reduce a procedure for the setting of the gap length in the variable length gap count control of a segmented field.

2. 发明专利

JPH07111199A ACCELERATOR, BEAM RADIATION METHOD, AND MEDICAL DEVICE 失效
公开(公告)号：JPH07111199A
公开(公告)日：1995-04-25
申请号：JP19396294
申请日：1994-08-18
申请人： HITACHI LTD
发明人： HIRAMOTO KAZUO , TADOKORO MASAHIRO , HIROTA JUNICHI , NISHI MASATSUGU , NODA AKIRA , INOUE MAKOTO
IPC分类号： H05H13/04 , A61N5/10
摘要： PURPOSE:To provide good quality charged particle beam in a simple device constitution, in a compact size, and under easy control by providing a deflection electromagnet with function of focusing and dispersing the particle beam in horizontal and vertical directions. CONSTITUTION:For a beam radiated by a radiator 15, its track is bent by deflection electromagnets 2, 3 in a process of circulation. Simularly, the electromagnets 2, 3 are capable of changing track gradient in a proportional force to deflection from a beam center track 1. The electromagnet 2 focuses the beam in the horizontal direction, and disperses it in the vertical direction, while the electromagnet 3 disperses the beam in the horizontal direction, and focuses it in the vertical direction. By action of these electromagnets 2, 3, the beam circulates around the track 1 while performing betatron vibration. The beam circulates in an accelerator stably while high frequency energy of the beam circulation frequency from a high frequency hollow 8 is added to the beam. Currents at the electromagnets 2, 3 are thus increased while the energy is given from the hollow 8 to the beam.

3. 发明专利

JPS63221444A CONTROL MEMORY DEVICE 失效
公开(公告)号：JPS63221444A
公开(公告)日：1988-09-14
申请号：JP5405987
申请日：1987-03-11
申请人： HITACHI LTD , HITACHI COMPUTER ELECTRONIC
发明人： NODA AKIRA , MIMURA KAZUNOBU
IPC分类号： G06F9/22 , G06F11/10 , G06F12/16
摘要： PURPOSE:To ensure the suitable control correction by reading an error correction code to a correction circuit when a parity error of a control instruction is detected, deciding the propriety for correction of said correction code as well as the control instruction containing the parity error and producing the correction data if the parity error is correctable. CONSTITUTION:A control instruction parity error detecting circuit 7 detects a parity error when a parity check bit 4 and a control instruction 3 stored in a control memory 1 are read out to a control instruction register 6. In this case, the circuit 7 outputs a correcting action start instruction to a correction circuit 8. The circuit 8 reads an error correction code out of an external mem ory 2. Then the circuit 8 decides the propriety for correction between the error correction code and the control instruction of the register 6. If the correction is possible, the correction data is produced and stored into a correction data storing register 9. Thus, a parity error is corrected when the control instruction is read out.

4. 发明专利

JPH0225916A DISK CONTROLLER AND DISK SYSTEM 失效
公开(公告)号：JPH0225916A
公开(公告)日：1990-01-29
申请号：JP17610088
申请日：1988-07-14
申请人： HITACHI LTD , HITACHI COMPUTER ELECTRONIC
发明人： NODA AKIRA
IPC分类号： G06F3/06
摘要： PURPOSE:To simplify the system constitution by counting the index signals received from a disk device, then outputting a detection signal to the outside after detecting the coincidence between the count value of a counter which is initialized by an action instruction issued from a host device and the prescribed value. CONSTITUTION:An index counter 7 contained in a disk controller is continuously initialized by a counter resetting signal 6 with each action instruction signal 3 received from a data processor. When no action instruction is received any more, the count value of the counter 7 is increased by a counter replacement signal 5. Then the count value of the counter 7 reaches the maximum level when the time elapsed from the last action instruction reaches a prescribed level. Thus a detection signal 10 is produced. Then the switching time point between the occupation states of its own system and another system is detected with the output of the signal 10. Then the necessary control is carried out. Thus the complication of a disk system can be avoided.

5. 发明专利

JPH1174100A ORBITAL ACCELERATOR AND OPERATING METHOD THEREOF 失效
公开(公告)号：JPH1174100A
公开(公告)日：1999-03-16
申请号：JP23210697
申请日：1997-08-28
申请人： HITACHI LTD , NODA AKIRA
发明人： HIRAMOTO KAZUO , NODA AKIRA
IPC分类号： H05H13/04
摘要： PROBLEM TO BE SOLVED: To emit a stable beam, by supplying an exciting current to a six pole magnet so that a six pole electromagnet can generate a six pole magnetic field, to impart diverging or converging force, in accordance with the track position of the beam, to the beam, to generate the six pole magnetic field for reducing the change of turn. SOLUTION: The change of an exciting current of a deflecting electromagnet 3, a four pole electromagnet 7, and a function joining type electromagnet 4, etc., changes the track position of the charged particle beam of a six pole electromagnet 92. While, a proportional relation exists between the track position of the electromagnet 92 and converging and diverging force imparted to the beam 17, also a fixed relation exists between the converging and diverging force and tune. By adequately setting the exciting current in the electromagnet 92, the electromagnet 92 imparts the converging and diverging force to the beam, in accordance with the track position of the charged particle beam of the electromagnet 92, generated by the change of the exciting current of the electromagnets 3, 7, and 4, etc. The change of the tune, caused by the change of the exciting current of the electromagnet 3, etc., disappear to reduction.

6. 发明专利

JPH04181441A DUPLEXED DATA PROCESSING SYSTEM 失效
公开(公告)号：JPH04181441A
公开(公告)日：1992-06-29
申请号：JP30892090
申请日：1990-11-16
申请人： HITACHI LTD , HITACHI COMPUTER ELECTRONIC
发明人： NODA AKIRA , MATSUDA YUKO
IPC分类号： G06F12/16 , G06F12/00
摘要： PURPOSE:To evade throughput from being lowered by updating the data base of the own device in an active side data processor, and the contents in the active side data base to the own device by a spare side data processor. CONSTITUTION:Corresponding to the input/output request of a central processing unit 1, an input/output control part 2 writes data, which are transferred in the order of SEEK-WRITE-SEEK-READ, to the prescribed SEEK address of an active side disk device 4 by using a disk controller 3. A spare side disk device 5 writes the data read from the active side disk device 4 to the prescribed seek address. In this way, the input/output processing is executed to the active side disk device 4 corresponding to the input/output processing request and on the other hand, only the data update part is transferred from the active side disk device 4 to the spare side disk device 5. Thus, there is no overhead to transfer data to the spare side disk device 5, and throughput can be evaded from being lowered.

7. 发明专利

JPH01312780A WRITE CONTROL SYSTEM FOR DISK CONTROLLER 失效
公开(公告)号：JPH01312780A
公开(公告)日：1989-12-18
申请号：JP14174188
申请日：1988-06-10
申请人： HITACHI LTD , HITACHI COMPUTER ELECTRONIC
发明人： HOASHI KOUICHI , NODA AKIRA
IPC分类号： G06F3/06 , G11B20/10 , G11B20/12
摘要： PURPOSE:To improve the reliability of a disk system by comparing a count counting a write position based on an index or a sector pulse as a reference with a preset track length or sector length always during the write and interrupting forcibly the write when the setting value is exceeded. CONSTITUTION:The content of a counter 1 and the setting value of a storage area 5 are compared by a comparator 6 during write. Since the value of the counter 1 does not exceeds the storage area 5 normally, the write interruption signal 7 being an output of the comparator 6 is 0. If an index or sector pulse is once missing, the write interruption signal 7 goes to 1 to act on a write control logic 9 to interrupt the write and even if a host device is going to write in excess of the track or sector capacity due to the index or sector pulse missing, the destruction of the record due to overwrite is prevented. Thus, the reliability of the disk system is enhanced.

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