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71. 发明专利

JPH10162377A DEVICE FOR REPRODUCING DISK AND METHOD THEREFOR 失效
公开(公告)号：JPH10162377A
公开(公告)日：1998-06-19
申请号：JP31402296
申请日：1996-11-25
申请人： HITACHI LTD
发明人： HIRAYAMA HIROSHI , TAKEUCHI TOSHIFUMI
IPC分类号： G11B7/00 , G11B7/005 , G11B7/085 , G11B7/095
摘要： PROBLEM TO BE SOLVED: To access a position of minimizing a track deviation due to eccentricity between two layered recording surfaces of a disk by calculating a pickup moving amt. with detection of a sector address and an access instruction and deciding a moving direction in terms of an actual moving amt. of a pickup from a calculated result. SOLUTION: After reproducing the disk, a sector address n' is detected and decided by a sector address detecting circuit 12, and by the sector address n' detected after issuing a focus changeover instruction and a reproducing starting sector address (m) comprised in the access instruction, k'=m-n is calculated by a pickup moving amt. calculating means 18. An absolute value of k' is converted into a moving amt. of the pickup 2, and also the moving direction is decided from the sign of + or - of k' by a moving amt. converting/direction deciding means 21, and the pickup 2 is moved to access a position of the sector address (m) by a pickup moving control circuit 11.

72. 发明专利

JPH09115244A RECORDING/REPRODUCING DEVICE AND ITS INTEGRATED CIRCUIT 失效
公开(公告)号：JPH09115244A
公开(公告)日：1997-05-02
申请号：JP27231695
申请日：1995-10-20
申请人： HITACHI LTD
发明人： KAWAMAE OSAMU , HIRABAYASHI MASAYUKI , HIRAYAMA HIROSHI , TAKEUCHI TOSHIFUMI , NAGAI YUTAKA
IPC分类号： G11B20/10 , G11B19/02 , G11B19/12 , G11B20/12 , G11B20/18
摘要： PROBLEM TO BE SOLVED: To reduce the circuit scale by switching input or output respectively transferring a signal to a means shared by a first and second recording/ reproducing means, the input or the output from the first recording/reproducing means, and the input or the output from the second recording/reproducing means. SOLUTION: The regenerative data 10 regenerated from a recording medium 9 are amplified by a reproducing amplifier 11 to be waveform-equalized, and are inputted to a regenerative signal processing means 13 or 15 according to a recorded format by a regenerative data changeover switch 12. The means 13 performs regenerative signal processing according to a first recording format, and the means 15 performs the regenerative signal processing according to a second recording format. A regenerative signal processing common circuit 14 is the circuit used for commonly functioning in the means 13, 15 and accesses the means 13, 15. A regenerative signal changeover switch 16 selects the recording signal processed signal to output it as a regenerative signal output 17. A system control means 18 judges the format of the recorded signal, and controls the changeover switches according to the judged result.

73. 发明专利

JPH0953966A HEATING ELEMENT TYPE AIR FLOW RATE MEASURING APPARATUS 失效
公开(公告)号：JPH0953966A
公开(公告)日：1997-02-25
申请号：JP20939195
申请日：1995-08-17
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： KOBAYASHI CHIHIRO , IGARASHI SHINYA , HIRAYAMA HIROSHI , SAITO TAKAYUKI
IPC分类号： G01F1/68 , F02D35/00 , G01F1/684
摘要： PROBLEM TO BE SOLVED: To enhance the accuracy of measurement at a low current velocity and to suppress the detection error due to adhesion of dust at a high current velocity. SOLUTION: A straightener 11 disposed in the upstream side from a heating element 3 is an air channel 9 has an effect equivalent to restricting the channel 9 and the pressure drop in the channel 9 increases. Consequently, the flow velocity to be detected by the heating element 3 increases as compared with the flow velocity before disposing the straightener. Increase of flow velocity at a low level is effective to enhance the detection accuracy but increase of flow velocity at a high level is undesirable because adhesion of dust to the heating element 3 is accelerated. A straightener 11 having a structural means for increasing the flow velocity at a low level and suppressing increase of flow velocity at a high level is thereby required. It can be realized by making dense or sparse the lettice of straghtener 11 thereby increasing or decreasing the frictional loss, respectively.

74. 发明专利

JPH0953482A THROTTLE BODY INTEGRATED AIR FLOW MEASURING DEVICE 失效
公开(公告)号：JPH0953482A
公开(公告)日：1997-02-25
申请号：JP21081895
申请日：1995-08-18
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： HIRAYAMA HIROSHI , IGARASHI SHINYA , ITSUJI TAKAYUKI , OZAWA MASAYUKI , KOBAYASHI CHIHIRO , NAGAYAMA KAZUO , YAMASHITA MITSURU
IPC分类号： F02D9/10 , F02D35/00
摘要： PROBLEM TO BE SOLVED: To obtain a throttle body integrated air flow measuring device, in which a measurement error caused by the change of throttle valve opening is reduced, and which is good in handling efficiency. SOLUTION: An air flow measuring device includes a throttle valve 12 turned on a throttle shaft 13 to open and close an air passage 5, and a heating resistor type air flow measuring part 70 disposed in the air passage 5 on the upstream side of the throttle valve 12 for measuring the air flow, and is assembled integrally with a throttle body 3 for forming the air passage 5. The throttle body 3 is so constructed that the sectional form of the air passage 5 in the throttle valve 12 arrangement surface is circular and the sectional form of the air passage 5 in the upstream and downstream side surfaces of the heating resistor type air flow measuring part 70 or the heating resistor type air flow measuring part 70 arrangement surface is non-circular in such a manner as to have a major axis parallel to the axial direction of the throttle shaft 13.

75. 发明专利

JPH08297039A HEATING ELEMENT TYPE AIR FLOW MEASURING APPARATUS 失效
公开(公告)号：JPH08297039A
公开(公告)日：1996-11-12
申请号：JP10341095
申请日：1995-04-27
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： IGARASHI SHINYA , SAITO TAKAYUKI , KOBAYASHI CHIHIRO , HIRAYAMA HIROSHI
IPC分类号： G01F1/68 , F02D35/00 , G01F1/684
摘要： PURPOSE: To reduce the pressure drop by forming a sub-channel of a compositional member having substantially a spherical profile, opening the inlet of the sub-channel in a plane perpendicular to the main flow while opening the outlet substantially in parallel with the main flow, thereby facilitating the arrangement of sub-channel in a main passage. CONSTITUTION: The sub-channel comprises an inlet 301 opened in a plane perpendicular to the direction 17 of main flow in a main passage 5, a channel 302 extending in parallel with the direction 17 and equipped with a heating element 1 inside, a curved part 303 opened in the outer circumferential direction of the channel 302 on the downstream side from the element 1 in order to bypass the flow in the sub-channel, a channel 304 for feeding the flow oppositely to the main flow substantially over the entire outer circumference except the vicinity of supporting member for the channel 302, and an outlet 305 opened in the outer wall face of the compositional member of sub-channel extending substantially in parallel with the main flow. The sub-channel part 400 has substantially spherical overall profile except the supporting part. An electronic circuit 8 is fixed onto a base member 7 while being protected by a circuit housing 9 integrated with a connector 11 and a cover 10. This structure facilitates fixing of the sub-channel.

76. 发明专利

JPH088841A QUASI-INSTANTANEOUS COMPANDING PCM VOICE REPRODUCING DEVICE 失效
公开(公告)号：JPH088841A
公开(公告)日：1996-01-12
申请号：JP14285394
申请日：1994-06-24
申请人： HITACHI LTD
发明人： HIRAYAMA HIROSHI , NAGAI YUTAKA , NAKAMURA MASAFUMI , TAKEUCHI TOSHIFUMI
IPC分类号： G10L13/00 , G10L19/00 , H03M7/38 , H03M13/00 , H04B14/04 , G10L3/00 , G10L9/18
摘要： PURPOSE:To reduce the effect on a reproduced voice and to relax a sense of incongruity provided to a listener listening to a reproduced voice by using range data whose expansion rate is smaller by one step than voice data when the voice data in N-th frame data are reproduced. CONSTITUTION:A counter control circuit 6 controls a counter 7 based on information A sent from a ranged ata error correction circuit 4. In the case of corrected range data, a counter load instruction B is outputted to load the range data stored in an input range data register 5 to the counter 7 to obtain range data with respect to N-th frame data. In the case of range data whose correction is disabled, a counter clock instruction C is outputted and a range is increased by one step toward a smaller expansion rate to the range data of (N-1)th frame data with intimate correlation with the N-th frame data stored in a range data storage circuit 8 to use the data for the range data with respect to the N-th frame data.

77. 发明专利

JPH06338132A DIGITAL SIGNAL RECORDING DEVICE AND RECORD REPRODUCER 失效
公开(公告)号：JPH06338132A
公开(公告)日：1994-12-06
申请号：JP12569193
申请日：1993-05-27
申请人： HITACHI LTD
发明人： OBATA SHINICHI , NAGAI YUTAKA , HIRAYAMA HIROSHI , TAKEUCHI TOSHIFUMI
IPC分类号： G11B20/18 , G11B19/02 , G11B20/10
摘要： PURPOSE:To enable dubbing at a high speed, and to shorten the dubbing time by installing the changeover circuit of compressed data on the recording side and expanded data on the reproduction side and transmitting reproduction side data to the recording side without expansion at the time of dubbing at a high speed. CONSTITUTION:A mean read-out rate is increased by a medium access requirement signal 57 from a first micro-computer 7 and continuous read is conducted at the time of a dubbing mode at a high speed in a mode changeover signal 22 from a mode setting terminal 21. The transfer rate of the input 5 of a first buffer RAM 6 and the transfer rate of an output 9 are equalized by a RAM control signal 8. A signal 9 before expansion output from the RAM 6 is selected as an output signal 24 in a changeover circuit 23, and a mean write rate to a recording-side recording medium 28 is also increased by the signal 57 and continuous wite is performed. Consequently, the signal is reproduced at a high speed from a reproduction-side recording medium 1, and the regenerative signal is recorded on the medium 28 at a high speed. Accordingly, compressed data can be dubbed without expansion, thus accelerating the dubbing.

78. 发明专利

JP2003178077A RETRIEVING METHOD AND RETRIEVING SYSTEM 审中-公开
公开(公告)号：JP2003178077A
公开(公告)日：2003-06-27
申请号：JP2001378023
申请日：2001-12-12
申请人： HITACHI LTD
发明人： HIRAYAMA HIROSHI
IPC分类号： G06F17/30
摘要： PROBLEM TO BE SOLVED: To make retrievable aimed music information with high accuracy even when a user has only a few retrieval keywords in retrieving the music. SOLUTION: When the retrieval is performed to the database accumulating the retrieval data relating to music, the database is composed of at least the first retrieval information relating to the music, the second retrieval information relating to the melody or lyric, the third retrieval information relating to the history of the use of the music, and the fourth information relating to the database accumulating the music data. The retrieval keyword of a category included in the first retrieval information or the third retrieval information is designated, the first retrieval is performed to the database, and then a retrieval keyword of a category included in the second retrieval information is designated to a result of the first retrieval to the database, thereby, the retrieval narrowed to a result of the first retrieval is performed. COPYRIGHT: (C)2003,JPO

79. 发明专利

JP2003100015A DATA TRANSFERRING METHOD AND OPTICAL DISK RECORDING DEVICE 审中-公开
公开(公告)号：JP2003100015A
公开(公告)日：2003-04-04
申请号：JP2001290412
申请日：2001-09-25
申请人： HITACHI LTD , HITACHI LG DATA STORAGE INC
发明人： HIRAYAMA HIROSHI , MOCHIZUKI MISUZU , SATO SATOSHI
IPC分类号： G11B20/10 , G11B7/004 , G11B19/28
摘要： PROBLEM TO BE SOLVED: To enable the recording control with respect to an optical disk having a wobble phase modulation format and the rotational control of the optical disk to be performed by an optical disk recording device corresponding to an LPP (land pre-pit) format. SOLUTION: In this data transferring method, when address information and additional information whose phases are modulated on the optical disk are detected and a plurality of a series of address information which are detected at the time of performing the data transfer of data including these detected information are converted into address information with respect to data blocks being recording units on the optical disk and the data of information including these converted results are transferred to reproduced wobble signals from the optical disk having the wobble phase modulation format, the transferring of the data is performed in a period when wobbles corresponding to a next data block are reproduced and the data are transferred by being made to be synchronized with the detection timing of a synchronizing signal whose phase is modulated and which is included in the period.

80. 发明专利

JP2002234407A DEVICE FOR DETERMINING DETERIORATION OF ON-VEHICLE BATTERY 失效
公开(公告)号：JP2002234407A
公开(公告)日：2002-08-20
申请号：JP2001030080
申请日：2001-02-06
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： AKAGI YOSHIHIKO , HIRAYAMA HIROSHI , KAWASAKI SEIICHI , OKADA MITSUYOSHI
IPC分类号： B60R16/04 , G01R31/36 , H01M10/48 , H02J7/00
摘要： PROBLEM TO BE SOLVED: To provide a device for determining the deterioration of an on-vehicle battery capable of determining at low cost whether or not the battery is deteriorated and reduced in capacity, without requiring hardware such as circuits to be added, for preventing the starting property of the vehicle from being impaired by low voltages during startup and for preventing an increase in the frequency of misfires. SOLUTION: The device includes low voltage counters 101 and 102 which count up if the battery voltage below a predetermined value becomes equal to or greater than the predetermined value under predetermined conditions, and a determination renewal means 103 which determines that the battery is deteriorated and reduced in capacity if the count value of each of the counters 101 and 102 is equal to or greater than the predetermined value before completion of engine startup.

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