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1. 发明专利

JPS63124263A INFORMATION STORAGE DEVICE 失效
公开(公告)号：JPS63124263A
公开(公告)日：1988-05-27
申请号：JP27062086
申请日：1986-11-13
申请人： FUJITSU LTD , NIPPON TELEGRAPH & TELEPHONE , NEC CORP
发明人： UNO KOJI , HATAGAMI TOSHIBUMI , MATSUURA HIDEO , MATSUMOTO KATSUAKI , ISHIZUKA HIROMI
IPC分类号： G11B21/08 , G11B19/02 , G11B19/04 , G11B25/04
摘要： PURPOSE:To report errors to a host unit with respect to a write instruction while being affected by oscillation due to runaway by providing a runaway detection part in accordance with respective head positioning means and causing one control part to return the errors with respect to the write instruction from the host unit for a prescribed time when the other part detects runaway. CONSTITUTION:The runaway detection parts 4a and 4b are provided in accordance with respective head positioning parts 2a and 2b, and they detect these runaway. A runaway detection output is given to the control part of other system. Respective control parts 3a and 3b can control for assuring the normal write action of a self system against the runaway of the system except for the self system. Namely, the errors are compulsorily informed to the host unit with respect to the write instruction of the self system for a time when oscillation which occurs by shock due to runaway is settled. Thus, the host unit executes a widely-known retrial by error information. The errors are informed to the retrial and the retrial is repeatedly executed before a prescribed time passes. Then the normal retrial action by the retrial is executed if the oscillation due to runaway is settled.

2. 发明专利

JPS63277485A EXCESSIVE SPEED CONTROL SYSTEM FOR SERVOMOTOR 失效
公开(公告)号：JPS63277485A
公开(公告)日：1988-11-15
申请号：JP11149987
申请日：1987-05-07
申请人： FUJITSU LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： SHINOHARA TORU , HATAGAMI TOSHIBUMI , IWATSUBO MASATO , MATSUMOTO KATSUAKI , OTANI KOJI
IPC分类号： H02P3/12 , G11B21/08
摘要： PURPOSE:To detect the condition of excessive speed correctly, by a method wherein the condition of excessive speed, in which the speed of a servomotor has become higher than a set limit speed, is detected by the speed signal of a servo control loop. CONSTITUTION:An excessive speed control system for a servomotor is constituted of a detecting unit 11, detecting the driving speed of the servomotor 4, an excessive speed detecting unit 13, a servo control unit 14 and a driving unit 15 while the servomotor 4 is driven in accordance with the control output DVS of the servo control unit 14 and the servomotor 4 is short-circuited when the servo control unit 14 has received an excessive speed detecting signal BS. The excessive speed detecting unit 13 is constituted of an excessive speed deciding circuit 13a and a latch circuit 13b while the detecting unit 13 changes a speed signal VS from the speed detecting unit 11 into an absolute value and compares it with a limit speed signal V0. When ¦VS¦>=V0, the detecting unit 13 outputs an excessive speed output to latch the running of the servomotor and generates the excessive speed detecting signal BS.

3. 发明专利

JPH04139689A MEDIUM CLEANING METHOD AND HEAD CLEANING METHOD FOR ASSEMBLED STORAGE DEVICE 失效
公开(公告)号：JPH04139689A
公开(公告)日：1992-05-13
申请号：JP26273490
申请日：1990-09-28
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SAITO MINORU , MATSUMOTO KATSUAKI
IPC分类号： G02B27/00 , G11B23/50 , G11B33/12
摘要： PURPOSE:To clean a storage medium without deteriorating a throughput by transferring a cartridge from a control container to a medium cleaner by a conveying mechanism, and transferring the cartridge from the cleaner to the control container by the conveying mechanism after cleaning the storage medium. CONSTITUTION:A controller 12 judges whether the rotation of either a cell drum 3 or 4 is necessary for the fetch of the cartridge to be cleaned. Then, the cell drum 3 or 4 is rotated in a timing in which the drum is capable of being rotated when the rotation of the cell drum is necessary. Moreover, the device 12 fetches the cartridge by driving a waiting accessor 5, and transfers this to a medium cleaner 9. The cleaner 9 rotates an information storing medium in the cartridge, wipes the face of the medium with a cloth, and remove stuck dust or the like in order to clean the medium. After the completion of the cleaning, the device 12 stores the information of the completion of the cleaning in a storage circuit corresponding to the cartridge, rotates either the drum 3 or 4, drives the waiting accessor 5, transfers the cartridge from the device 9 back to a storing rack, and stores it. Thus, the cleaning of the information storing medium is executed without deteriorating the throughstop concerning the recording or reproduction of the information.

4. 发明专利

JPS61910A METHOD FOR GENERATING DETECTION SIGNAL FOR INFORMATION ON POSITION 失效
公开(公告)号：JPS61910A
公开(公告)日：1986-01-06
申请号：JP12078684
申请日：1984-06-14
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KOSHIMOTO YASUHIRO , NAKANISHI HIROSHI , MATSUMOTO KATSUAKI , TAKANAMI SHIYUUICHI
IPC分类号： G11B5/596
摘要： PURPOSE:To reduce size and cost by allowing saw tooth wave magnetizations having the repetitive period longer than the half-amplitude level of Lorentz-shape isolated waveforms to remain with the polarities inverted at every track and obtaining the detection signal for the information on position from the difference between the peak values of the signals obtd. by reading out the magnetizations. CONSTITUTION:The Lorentz-shape isolated waveforms having positive and negative peak levels are read out from the positive and negative parts of the steep slopes of the respective magnetizations when the saw tooth wave magnetizations with the polarities inverted at every track are allowed to remain and are read by a magnetic head. The repetitive period of the saw tooth wave magnetizations is set longer than the half-amplitude level of the Lorentz-shape isolated waveforms. The signal waveforms from both tracks read out of the magnetic head are held in a peak holding circuit 7 when the magnetic head moves in the track pitch direction. The difference between both peak values is then outputted therefrom. The signal is supplied to a control circuit and the position of the magnetic head is so controlled that the position detection signal is made zero. The magnetic head is thus exactly positioned to the intermediate position between the odd-numbered track and even-numbered track.

5. 发明专利

JPS546743A INTERRPROCESSOR COUPLING SYSTM 失效
公开(公告)号：JPS546743A
公开(公告)日：1979-01-19
申请号：JP7176177
申请日：1977-06-17
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： MATSUMOTO KATSUAKI , TANAKA TADASHI , TACHIBANA MASATOSHI
IPC分类号： G06F15/16 , G03G21/00 , G06F3/00 , G06F12/00 , G06F12/02 , G06F13/00 , G06F15/167 , G06F15/177
摘要： PURPOSE:To secure an access to the memory circuit at an optional time point by having a coupling to the independent address via a memory circuit featuring a function which enables a simultaneous writting/reading.

6. 发明专利

JPH02134776A HEAD POSITIONING SERVO SYSTEM 失效
公开(公告)号：JPH02134776A
公开(公告)日：1990-05-23
申请号：JP28758188
申请日：1988-11-16
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： MIZUKAMI MAKOTO , TAKANAMI SHUICHI , MATSUMOTO KATSUAKI , KATO TADASHI
IPC分类号： G11B21/10
摘要： PURPOSE:To attain highly accurate head positioning by writing an analog position information data at the 1st servo write and writing a prescribed number of position correction data at the 2nd servo write in response to an odd or even number of the servo track number. CONSTITUTION:An error correction bit is added to position correction data 24, 25 to form a Humming code. Then 1 word of position correction data is formed from the coded position correction data 24, 25 in this way and a pattern based on one word of the position correction data is arranged repetitively to the servo track. The position information for the servo control of a servo head 20a is given as the sum between the reproduced analog information and the position correction data. The analog position information data is written at the 1st servo write and two position correction data are written at the 2nd servo write in response to the odd or even servo track number.

7. 发明专利

JPS55110341A LOGIC CIRCUIT 失效
公开(公告)号：JPS55110341A
公开(公告)日：1980-08-25
申请号：JP1744079
申请日：1979-02-16
申请人： NIPPON ELECTRIC CO , NIPPON TELEGRAPH & TELEPHONE
发明人： WATANABE YASUHISA , MATSUMOTO KATSUAKI
IPC分类号： G06F7/00 , H03K19/00 , H03K19/0175
摘要： PURPOSE:To make it possible to set operation modes of circuits through the repetition of shift-in data during a test and diagnosis, by using a register with a shift function for setting operation modes of circuits. CONSTITUTION:For a test and diagnosis at the time of normal use, error correction code generating circuit 13 is tested and diagnosed. Next, a shift function is used to set an operation mode of error correction of operation-mode setting register 2. The supply of error data with the shift function stopped once puts error correction circuit 14 into error correction operation. The shift function changes input to input selector circuit 11 over to that from error correction circuit 14 again. Then, the shift function is stopped again and a signal from output line 106 of error correction circuit 14 is set to latch register 12. Next, the content of latch register 12 is read out by the shift function, so that a normal unused point can be tested and diagnosed.

8. 发明专利

JPS5338232A REDUNDANCY CODING CIRCUIT 失效
公开(公告)号：JPS5338232A
公开(公告)日：1978-04-08
申请号：JP11240076
申请日：1976-09-21
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： MATSUMOTO KATSUAKI , TANAKA TADASHI , EMORI SADAJI
IPC分类号： G06F11/10
摘要： PURPOSE:The memory in which arithmetic contents are stored is used instead of EOR (exclusive '' or'' ) operating generator polynomials, and a plural number of bits of the original information are processed in parallel, thereby making the high-speed process of a redundancy coding circuit possible.

9. 发明专利

JPH01196766A TROUBLE PREDICTING ALARM SYSTEM FOR MAGNETIC DISK STORAGE DEVICE 失效
公开(公告)号：JPH01196766A
公开(公告)日：1989-08-08
申请号：JP2150388
申请日：1988-02-01
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KOYAIZU IKURO , MATSUMOTO KATSUAKI
IPC分类号： G11B19/04
摘要： PURPOSE:To previously predict the destruction of data due to the contact of a head and a medium and or the damage of an equipment by mounting a pressure sensing element on a floating head and monitoring a signal emitted by the element during the operation of a system. CONSTITUTION:When a power source is charged, a head slider is floated according to the rotation of the medium to bring a state for writing and reading data on a recording track, an operation for monitoring a statistic contact between the head and the medium is started. When the statistic contact between the head slider and the medium is generated, pressure sensors 11, 12,...1N generating the contact generate a voltage signal and input to counter circuits 31, 32,...3N. When the number of contact bits is counted and any counter circuit overflows, a gate 51 is opened to inform to an input and output interface control circuit 61 and the contents of the counter circuit are turned out to a buffer storage device 50. In a host processor 70, a command for reading the contents of the device 50 is prepared and a magnetic disk storage device sequentially reads the contents of the device 50 and outputs to the processor 70. Based on an output result, an operator can instruct to take a required processing.

10. 发明专利

JPS546742A ENCODING SYSTEM 失效
公开(公告)号：JPS546742A
公开(公告)日：1979-01-19
申请号：JP7240477
申请日：1977-06-17
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： EMORI TEIJI , TANAKA TADASHI , MATSUMOTO KATSUAKI , TAKANAMI SHIYUUICHI , NAKANISHI HIROSHI
IPC分类号： G06F11/10 , G11B5/09 , G11B20/14 , H03M5/14 , H03M7/00 , H03M7/02 , H04L25/49
摘要： PURPOSE:To enhance the relieving capacity for the burst-type error by inserting the m-bit flag bit into the center or before or after the n-bit binary signal.

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