Patents by Inventor Hiroshi Hirayama
Hiroshi Hirayama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6681742Abstract: An air flow sensor for an internal combustion engine is disclosed. An air flow rate measurement meter, a pressure gauge, electronically controlled throttle body, and the microcomputer, etc. are integrated as one body, and the correction of the air flow rate, the control, and the fault diagnosis, etc. are done in the integrated microcomputer. The air flow sensor outputs an air flow rate signal in which the error is deleted to suppress the discharge of the harmful exhaust gas from the internal combustion engine, carries out the self-diagnosis of the breakdown of the air flow sensor or the electronically controlled throttle body to prevent the accident beforehand, and controls to obtain the best intake air amount.Type: GrantFiled: December 14, 2001Date of Patent: January 27, 2004Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Hiroshi Hirayama, Shinya Igarashi, Takayuji Itsuji, Yasuo Makie
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Publication number: 20030228413Abstract: A surface treating method of forming a coating layer on a base material, comprising conducting a plasma processing under an atmospheric pressure for the base material so as to form a coating layer on the base material having at least one of a curved surface and an uneven surface.Type: ApplicationFiled: June 9, 2003Publication date: December 11, 2003Applicant: KONICA CORPORATIONInventors: Tatsuo Ohta, Satoshi Nakano, Hiroshi Hirayama
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Publication number: 20030169670Abstract: In an optical recording medium for conducting at least one of reading and recording of optical information, the optical recording medium includes: a base board; and an antireflection layer composed of at least one layer, which is provided on a surface of a side of the base board where light enters for conducting at least one of the reading and recording of information. A wavelength of light that makes reflectance of the antireflection layer to light to be smallest is longer than that of the light that enters for conducting at least one of the reading and recording of information.Type: ApplicationFiled: November 4, 2002Publication date: September 11, 2003Applicant: KONICA CORPORATIONInventor: Hiroshi Hirayama
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Publication number: 20030107291Abstract: In a permanent magnet type rotating electric machine comprising a stator of which concentratedly wound armature windings are disposed in a plurality of slots formed in a stator core so as to surround teeth and a rotor accommodating permanent magnets in a plurality of permanent magnet insertion holes formed in a rotor core, a part of outer circumferential faces of slots is formed to extend substantially in parallel with a part of inner circumferential faces of the teeth, thereby, a permanent magnet type rotating electric machine with limited noises can be realized.Type: ApplicationFiled: January 8, 2003Publication date: June 12, 2003Applicant: Hitachi, Ltd.Inventors: Ryoichi Takahata, Shinichi Wakui, Haruo Koharagi, Satoshi Kikuchi, Miyoshi Takahashi, Masaharu Senoh, Keiji Noma, Hiroshi Hirayama, Takashi Seshimo, Shigeya Kawaminami
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Patent number: 6552461Abstract: In a permanent magnet type rotating electric machine comprising a stator of which concentratedly wound armature windings are disposed in a plurality of slots formed in a stator core so as to surround teeth and a rotor accommodating permanent magnets in a plurality of permanent magnet insertion holes formed in a rotor core, a part of outer circumferential faces of slots is formed to extend substantially in parallel with a part of inner circumferential faces of the teeth, thereby, a permanent magnet type rotating electric machine with limited noises can be realized.Type: GrantFiled: March 6, 2002Date of Patent: April 22, 2003Assignee: Hitachi, Ltd.Inventors: Ryoichi Takahata, Shinichi Wakui, Haruo Koharagi, Satoshi Kikuchi, Miyoshi Takahashi, Masaharu Senoh, Keiji Noma, Hiroshi Hirayama, Takashi Seshimo, Shigeya Kawaminami
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Patent number: 6535877Abstract: A pattern recognition apparatus includes a plurality of net structure dictionaries, reconstruction section, a first storage section, and a pattern matching section. Each net structure dictionary has a net structure formed by a parent arc representing a common portion of a plurality of standard patterns to a child arc representing a remaining portion. The reconstruction section extracts a common structure from the net structure dictionaries and reconstructs them to generate a reconstructed dictionary. The first storage section stores connecting information representing the relationship between the extracted common structure and the net structure dictionaries. The pattern matching section refers to the plurality of net structure dictionaries, reconstructed dictionary, and the connecting information and performs pattern matching processing between an input pattern and recognition targets formed from standard patterns using beam search.Type: GrantFiled: August 16, 2000Date of Patent: March 18, 2003Assignee: NEC CorporationInventor: Hiroshi Hirayama
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Publication number: 20020171309Abstract: Reduction of cogging torque and torque pulsation in the rotor with permanent magnets embedded therein. In a rotating electrical machine comprising a stator 5 with an armature winding wound on the stator core and a rotor 1 with permanent magnet 2 embedded in the rotor core 9, a magnetic flux short circuit preventive hole 3 radially extending from the circumferential ends of the permanent magnets 2 (in the vicinity of q-axis) to the vicinity of outer periphery of the rotor core is further extended toward the d-axis (circumferential direction). At the same time, the distance between the outer periphery of the magnetic flux short circuit preventive hole 3 and that of the rotor core is increased gradually in conformity to the approach to d-axis side from q-axis.Type: ApplicationFiled: September 27, 2001Publication date: November 21, 2002Inventors: Shinichi Wakui, Haruo Koharagi, Ryoichi Takahata, Takashi Seshimo, Hiroshi Hirayama, Miyoshi Takahashi
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Publication number: 20020130574Abstract: In a permanent magnet type rotating electric machine comprising a stator of which concentratedly wound armature windings are disposed in a plurality of slots formed in a stator core so as to surround teeth and a rotor accommodating permanent magnets in a plurality of permanent magnet insertion holes formed in a rotor core, a part of outer circumferential faces of slots is formed to extend substantially in parallel with a part of inner circumferential faces of the teeth, thereby, a permanent magnet type rotating electric machine with limited noises can be realized.Type: ApplicationFiled: March 6, 2002Publication date: September 19, 2002Inventors: Ryoichi Takahata, Shinichi Wakui, Haruo Koharagi, Satoshi Kikuchi, Miyoshi Takahashi, Masaharu Senoh, Keiji Noma, Hiroshi Hirayama, Takashi Seshimo, Shigeya Kawaminami
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Publication number: 20020053051Abstract: There are provided a digital signal forming method, a disc recording medium for high density recording and a method of reproducing a digital signal for encoding of the error correction code of the related art and improving the error correction capability without any requirement in change of the number of codes.Type: ApplicationFiled: February 28, 2001Publication date: May 2, 2002Inventor: Hiroshi Hirayama
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Patent number: 6347353Abstract: An information medium having digital signals recorded therein includes a disk having first and second recording surfaces. The digital signals are in the form of a data frame including a lead-in block and n data blocks. The lead-in block has a same format as the n data blocks. n block addresses are assigned to the n data blocks. Information identifying an area on the disk in which the n data blocks is recorded is assigned to the n data blocks. m data blocks (0<m<n) are recorded on the first recording surface, and remaining (n−m) data blocks are recorded on the second recording surface. The lead-in block is recorded at the head of the data frame, and includes information identifying an area on the disk in which the lead-in block is recorded, a number of recording surfaces, the block address of one of the m data blocks recorded last on the first recording surface, and the block address of a last one of the n data blocks in the data frame.Type: GrantFiled: June 30, 1999Date of Patent: February 12, 2002Assignee: Hitachi, Ltd.Inventors: Hiroshi Hirayama, Osamu Kawamae, Masayuki Hirabayashi, Yutaka Nagai, Toshifumi Takeuchi
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Patent number: 6332174Abstract: An apparatus for reproducing digital signals recorded on a disk having first and second recording surfaces. The digital signals are in the form of a data frame including a lead-in block and n data blocks. The lead-in block has a same format as the n data blocks. n block addresses are assigned to the n data blocks. Information identifying an area on the disk in which the n data blocks is recorded is assigned to the n data blocks. m data blocks (0<m<n) are recorded on the first recording surface, and remaining (n−m) data blocks are recorded on the second recording surface. The lead-in block is recorded at the head of the data frame, and includes information identifying an area on the disk in which the lead-in block is recorded, a number of recording surfaces, the block address of one of the m data blocks recorded last on the first recording surface, and the block address of a last one of the n data blocks in the data frame.Type: GrantFiled: June 29, 1999Date of Patent: December 18, 2001Assignee: Hitachi, Ltd.Inventors: Hiroshi Hirayama, Osamu Kawamae, Masayuki Hirabayashi, Yutaka Nagai, Toshifumi Takeuchi
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Patent number: 6327905Abstract: An improved heating resistor type air flow measurement apparatus which can operate properly even when the noises are produced by a large surge current, and even when the air flow measurement apparatus is made of plastic member. The apparatus has a heating resistor arranged in the main air passage, a temperature-sensitive resistor and a flow measurement circuit for processing signals from their resistors. Inductors are provided between these resistors to prevent noise invasion into the flow measurement circuit.Type: GrantFiled: December 21, 1998Date of Patent: December 11, 2001Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Takayuki Itsuji, Hiroshi Hirayama
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Patent number: 6324618Abstract: An optical disk reproducing apparatus for reproducing digital signals in the form of a data frame including a lead-in block and data blocks from an optical disk including at least first and second recording surfaces each being readable from a same side of the optical disk. The data blocks include block addresses and data, and are recorded on the first and second recording surfaces. The lead-in block is recorded at a head of the data frame and includes disk information relating to a number of data blocks recorded on the first and second recording surfaces.Type: GrantFiled: May 3, 2000Date of Patent: November 27, 2001Assignee: Hitachi, Ltd.Inventors: Hiroshi Hirayama, Osamu Kawamae, Masayuki Hirabayashi, Yutaka Nagai, Toshifumi Takeuchi
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Publication number: 20010014858Abstract: An pattern dissimilarity calculator according to the present invention, which calculates a pattern dissimilarity between a first and second sequence feature pattern using either the DP matching approach or the HMM (Hidden Marcov Model) approach, comprises cumulative distance calculator 1 for calculating the distance between frame i of said first sequence feature pattern and each of frames of said second sequence feature pattern, and obtaining a current cumulative distance by adding to an cumulative distance obtained in terms of frame i−1, which is decoded in cumulative decoder 4; and cumulative distance encoder 2 for encoding the cumulative distance calculated by the cumulative distance calculator 1. The cumulative distance decoder 4 decodes cumulative distances encoded by the encoding means.Type: ApplicationFiled: February 23, 2001Publication date: August 16, 2001Applicant: NEC CorporationInventor: Hiroshi Hirayama
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Patent number: 6233649Abstract: A method of reproducing digital signals recorded on a disk having first and second recording surfaces. The digital signals are in the form of a data frame including a lead-in block and n data blocks. The lead-in block has a same format as the n data blocks. n block addresses are assigned to the n data blocks. Information identifying an area on the disk in which the n data blocks is recorded is assigned to the n data blocks. m data blocks (0<m<n) are recorded on the first recording surface, and remaining (n−m) data blocks are recorded on the second recording surface. The lead-in block is recorded at the head of the data frame, and includes recording area identifying information identifying an area on the disk in which the lead-in block is recorded, and disk information identifying (1) a number of recording surfaces, (2) the block address of one of the m data blocks recorded last on the first recording surface, and (3) the block address of a last one of the n data blocks in the data frame.Type: GrantFiled: June 28, 1999Date of Patent: May 15, 2001Assignee: Hitachi, Ltd.Inventors: Hiroshi Hirayama, Osamu Kawamae, Masayuki Hirabayashi, Yutaka Nagai, Toshifumi Takeuchi
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Patent number: 6189379Abstract: A thermal type air flow measuring instrument is mounted to a main passage forming an intake air passage of an internal combustion engine and is provided. with an auxiliary passage which includes a heating resistor and a temperature sensing resistor therein and an electronic circuit which is electrically connected to the heating resistor and the temperature sensing resistor. The auxiliary passage is a passage including at least one bent portion composed of a first path substantially parallel to the main passage and a second path having a path different in flow direction from the first path. A member forming the auxiliary passage is fixed in a united form to only a case member for interiorly protecting the electronic circuit, and the case member is fixed to the outer wall surface of the intake air passage.Type: GrantFiled: July 28, 1999Date of Patent: February 20, 2001Assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co., Ltd.Inventors: Shinya Igarashi, Chihiro Kobayashi, Hiroshi Hirayama, Takayuki Saito, Nobukatsu Arai
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Patent number: 6181660Abstract: A digital signal processor circuit is provided which is operable to perform n-bit serial-to-parallel conversion with respect to data of one-bit serial form as read out of a recording medium thereby enabling correct detection of a synchronization pattern contained for transmission in such n-bit data and also correct data demodulation while at the same time achieving semiconductor integration with less power dissipation.Type: GrantFiled: November 3, 1998Date of Patent: January 30, 2001Assignee: Hitachi, Ltd.Inventors: Hiroshi Hirayama, Toshifumi Takeuchi, Hiroyuki Gunji
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Patent number: 6154806Abstract: A method of recording digital signals on a disk having at least a first recording surface and a second recording surface. The digital signals are in the form of a data frame including a lead-in block and n data blocks. The lead-in block has a same format as the n data blocks. The method includes the steps of assigning n block addresses to respective ones of the n data blocks, assigning, to each of the n data blocks, information identifying an area on the disk in which a respective one of the n data blocks is to be recorded, recording m data block (0<m<n) of the n data blocks on the first recording surface of the disk, recording remaining (n-m) data blocks of the n data blocks on the second recording surface of the disk, and recording the lead-in block at the head of the data frame.Type: GrantFiled: June 25, 1999Date of Patent: November 28, 2000Assignee: Hitachi, Ltd.Inventors: Hiroshi Hirayama, Osamu Kawamae, Masayuki Hirabayashi, Yutaka Nagai, Toshifumi Takeuchi
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Patent number: 6147023Abstract: An HC-adsorbent capable of adsorbing various kinds of hydrocarbon including lower and higher hydrocarbon, of which the adsorbable amount per unit volume is large, and which exhibits excellent durability at elevated temperatures. The HC-adsorbent is composed of a first zeolite of ZSM-5 of which the silica/alumina (SiO.sub.2 /Al.sub.2 O.sub.3) mole-ratio is 500 or more, and a second zeolite of Y-type zeolite of which the silica/alumina (SiO.sub.2 /Al.sub.2 O.sub.3) mole-ratio is 200 or more. The second zeolite mainly adsorbs higher hydrocarbon while the first zeolite mainly adsorbs lower hydrocarbon, thus enabling adsorption of many kinds of hydrocarbon.Type: GrantFiled: October 22, 1998Date of Patent: November 14, 2000Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hiroshi Hirayama, Takaaki Kanazawa, Kazuhiro Sakurai
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Patent number: 6112173Abstract: The pattern recognition device utilizes a tree structure wherein the phoneme data is organized in a particular fashion. Specifically, the phonemes of the subordinate nodes are categorized into groups made up of similar phonemes. A phoneme that corresponds on average to the groups of subordinate nodes is established as the parent node of that group. Distances of similarity of the plurality of standard elements with respect to each of the plurality of consecutive recognition elements are calculated and stored. Parent nodes for which these distances are small are selected, and the distances with respect to recognition elements are calculated for only the subordinate nodes of the selected parent nodes. Distances stored in this way are accumulated in correspondence with tree structure data and standard data. The item of standard data for which the accumulated distance is the smallest is outputted as the recognition result.Type: GrantFiled: April 1, 1998Date of Patent: August 29, 2000Assignee: NEC CorporationInventor: Hiroshi Hirayama