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61. 发明专利

JPH0413741B2 失效
公开(公告)号：JPH0413741B2
公开(公告)日：1992-03-10
申请号：JP17994286
申请日：1986-08-01
申请人： HITACHI LTD
发明人： MORI KINJI , IHARA KOICHI
IPC分类号： G06F15/16 , G06F15/177

62. 发明专利

JPH0366718B2 失效
公开(公告)号：JPH0366718B2
公开(公告)日：1991-10-18
申请号：JP14944184
申请日：1984-07-20
申请人： HITACHI LTD
发明人： FURUMURA FUMINOBU , IHARA KOICHI , ISHIZAKI MASAYUKI , KUBO YUTAKA
IPC分类号： G08G1/0968 , G01C21/00 , G08G1/123

63. 发明专利

JPH03117304A DETERMINATION OF FUZZY INFERENCE CONTROL COMMAND 失效
公开(公告)号：JPH03117304A
公开(公告)日：1991-05-20
申请号：JP21426990
申请日：1990-08-15
申请人： HITACHI LTD
发明人： YASUNOBU SEIJI , MIYAMOTO SHOJI , IHARA KOICHI
IPC分类号： B60L15/40 , G05B13/02
摘要： PURPOSE:To reduce changing time of notch in stop control by applying control decision method utilizing fuzzy inference. CONSTITUTION:Expected stop points xZ, xP, xN and distances Lz, LP, LN to a target point O, for current notch, one notch increment and one notch decrement, are obtained based on the distance L1 to the target stop point, current speed VT1, current acceleration alphaT1 and the variation of acceleration DELTAalpha for single change of notch. Then a fuzzy amount mu1 for allowing stoppage within an allowable error range and a fuzzy amount mu2 for allowing accurate stoppage at the target stop position, corresponding to the obtained distances, are determined through a membership function. Then a notch for obtaining the maximum value, among mu1 and mu2, is selected.

64. 发明专利

JPH0369029A DUST REMOVING SYSTEM FOR OPTICAL DISK DEVICE 失效
公开(公告)号：JPH0369029A
公开(公告)日：1991-03-25
申请号：JP20467889
申请日：1989-08-09
申请人： HITACHI LTD , HITACHI VIDEO ENG
发明人： YAMADA YUICHI , IKEDA KAZUO , IHARA KOICHI
IPC分类号： G11B7/12 , G11B7/121 , G11B19/02 , G11B19/04
摘要： PURPOSE:To effectively clean the surface of an objective lens by optically detecting the amount of dust accumulated on the objective lens of an optical head and displaying a dust removing method corresponding to the detection level by using an interactive language. CONSTITUTION:On a first stage that the dust 15 is slightly accumulated on the objective lens 11, the dust is automatically removed by a brush 10 in a disk driving device 6 and a host computer 3 displays a state under cleaning on a display 16 while removing the dust. Next, on a second stage that the dust 15 on the objective lens 11 is not cleaned off any more by the use for a long time, and further the level of reflected light 12 is lowered, the computer 3 sends out a signal to an image ROM 1 or the device 6 and it is displayed on the display 16 tp eject a cassette 7 and to insert a cleaning disk. The cycle of these first and second stages is repeated and when the level of the reflected light 12 is further lowered on a third stage, the computer 3 displays the dust removing method by manual operation and the exchanging method of the brush 10 when required on the display 16.

65. 发明专利

JPH02219421A PROTECTIVE DEVICE, OVERCURRENT DETECTION CIRCUIT AND LATCH-UP DETECTION DEVICE FOR SEMICONDUCTOR DEVICE 失效
公开(公告)号：JPH02219421A
公开(公告)日：1990-09-03
申请号：JP3709489
申请日：1989-02-16
申请人： HITACHI LTD , HITACHI COMMUNICATION SYSTEM
发明人： KANEKAWA NOBUYASU , IHARA KOICHI , KIKUCHI MINORU
IPC分类号： H02H7/20 , H01L21/8234 , H01L27/088 , H03K17/08 , H03K19/08
摘要： PURPOSE:To facilitate the discrimination between normal current and overcurrent and to improve overcurrent detection sensitivity by dividing a plurality of ICs, the load, into a plurality of load groups and by providing an overcurrent detection circuit to a specified load group in a load group unit. CONSTITUTION:When any of the overcurrent detection signals is inputted, a holding circuit 60 turns OFF all switching circuits 20-1 to 20-N for the preset holding time only and stops the current supply to load groups 4-1 to 4-N. The latch-up of thew load group to which latch-up is caused becomes extinct. After the elapse of holding time, power supply is again put to work to restore the function of each load. The holding time is determined in correspondence with the time when the latch-up gets completely extinct.

66. 发明专利

JPH0237740B2 失效
公开(公告)号：JPH0237740B2
公开(公告)日：1990-08-27
申请号：JP5178681
申请日：1981-04-08
申请人： HITACHI LTD
发明人： MORI KINJI , NOMI MAKOTO , MYAMOTO SHOJI , IHARA KOICHI , MATSUMARU HIROSHI , IKEDA KATSUAKI
IPC分类号： G06F13/00 , H04L12/46

67. 发明专利

JPH0227882B2 失效
公开(公告)号：JPH0227882B2
公开(公告)日：1990-06-20
申请号：JP8811779
申请日：1979-07-13
申请人： HITACHI LTD
发明人： NOMI MAKOTO , IHARA KOICHI , YASUNAMI MASAHIRO
IPC分类号： B60L15/40 , B61L3/00 , B61L3/12

68. 发明专利

JPH01232443A IMPROVING SYSTEM FOR RELIABILITY OF COMPUTER 失效
公开(公告)号：JPH01232443A
公开(公告)日：1989-09-18
申请号：JP5828688
申请日：1988-03-14
申请人： HITACHI LTD
发明人： KATO TOSHIHIKO , IHARA KOICHI , MAEJIMA HIDEO , KANEKAWA NOBUYASU
IPC分类号： G06F11/18
摘要： PURPOSE:To improve the reliability of a processing result and to improve the admissibility for the trouble of a comparator by providing plural comparators which compare and collate the processing results of respective arithmetic processors. CONSTITUTION:Majority-logic circuits 5-8 are multiplexed and the outputs of the circuits 5-8 are re-inputted to the arithmetic processors BPU1-BPU4. Thus, the circuits 5-8 are multiplexed, so if one circuit is troubled, the troubled circuit is disconnected and switched to a normal circuit to evade the trouble. Further, the circuit outputs which are re-inputted to the BPUs 1-4 are compared in the BPUs with the outputs of the BPUs to decide whether or not the circuits or BPUs are normal, so the troubled circuit or BPU is identified, disconnected, and switched to normal one, thereby improving the reliability.

69. 发明专利

JPH0130336B2 失效
公开(公告)号：JPH0130336B2
公开(公告)日：1989-06-19
申请号：JP20165384
申请日：1984-09-28
申请人： HITACHI LTD
发明人： YAMANAKA GIICHI , MORI KINJI , IHARA KOICHI , KAWAI YOSHINORI
IPC分类号： H04L12/437

70. 发明专利

JPS6462039A DIGITAL MUTE CIRCUIT 失效
公开(公告)号：JPS6462039A
公开(公告)日：1989-03-08
申请号：JP21783187
申请日：1987-09-02
申请人： HITACHI LTD
发明人： HANADA KENJI , NISHIMURA YUZO , IHARA KOICHI , TANASE TADASHI
IPC分类号： G11B20/10 , H04B1/10 , H04H1/00 , H04H40/72
摘要： PURPOSE:To prevent noise from being generated in an audio circuit by shutting off a signal other than an audio data from being transferred to the audio circuit. CONSTITUTION:A digital signal recorded on a CD 1 is read by a pickup section 2, sent to a CD signal processing section 3, where signal processing is applied according to the CD format and the signal is fed to a CD-ROM signal processing section 7, where the signal processing is attained by the CD-ROM format. On the other hand, the signal is fed to a D/A converter section 6 through a gate circuit 5 from the CD signal processing section 3 by the audio output. In such a case, the output signal of the CD signal processing section 3 is gated by the gate circuit 5 by using a mute signal MUTE from a system controller section 4. When the digital signal recorded on the CD 1 is a digital data signal, the signal is not sent to the D/A converter section 6. Thus, the noise due to data transmission call be prevented.

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