Patents by Inventor Eiji Fujioka
Eiji Fujioka 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: 8120474Abstract: A communication system for a vehicle includes a portable identification device including a portion for receiving an interrogation signal and a portion for transmitting an indication indicative signal responsive to the interrogation signal, multiple tire sensor devices each of which includes a portion for receiving an initiation signal and a portion for transmitting a condition indicative signal responsive to the initiation signal, multiple transmitting devices each of which emits the interrogation signal and the initiation signal for different conditions within a communication area, a receiving device for receiving the indication indicative signal and the condition indicative signal, and a central controller for unlocking a door lock device when the portable identification device is determined to be in an overlapped area based on a condition of the portable identification device, the overlapped area being defined between two adjacent communication areas and in which the door lock device is involved.Type: GrantFiled: August 22, 2011Date of Patent: February 21, 2012Assignee: Aisin Seiki Kabushiki KaishaInventors: Eiji Fujioka, Manabu Kato
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Publication number: 20110298600Abstract: A communication system for a vehicle includes a portable identification device including a portion for receiving an interrogation signal and a portion for transmitting an indication indicative signal responsive to the interrogation signal, multiple tire sensor devices each of which includes a portion for receiving an initiation signal and a portion for transmitting a condition indicative signal responsive to the initiation signal, multiple transmitting devices each of which emits the interrogation signal and the initiation signal for different conditions within a communication area, a receiving device for receiving the indication indicative signal and the condition indicative signal, and a central controller for unlocking a door lock device when the portable identification device is determined to be in an overlapped area based on a condition of the portable identification device, the overlapped area being defined between two adjacent communication areas and in which the door lock device is involved.Type: ApplicationFiled: August 22, 2011Publication date: December 8, 2011Applicant: AISIN SEIKI KABUSHIKI KAISHAInventors: Eiji FUJIOKA, Manabu Kato
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Publication number: 20100253183Abstract: A piezoelectric film sensor includes a substrate 1 having a signal electrode 2 and a ground electrode 3 formed on the surface thereof, the substrate being folded to cause the signal electrode 2 and the ground electrode 3 to be overlapped with each other in a plane view, a piezoelectric film 5 inserted between the signal electrode 2 and the ground electrode 3 formed on the substrate 1 and a bonding layer 6 for bonding the folded substrate 1 thereby to affix the signal electrode 2, the ground electrode 3 and the piezoelectric film 5 together.Type: ApplicationFiled: August 8, 2008Publication date: October 7, 2010Applicants: AISIN SEIKI KABUSHIKI KAISHA, KUREHA CORPORATIONInventors: Mitsuhiro Ando, Eiji Fujioka, Shunsuke Kogure, Hitoshi Takayanagi, Nobuhiro Moriyama, Ryuichi Sudo
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Patent number: 7768272Abstract: A capacitance detecting apparatus includes: a first on/off switch; a first reference capacitor; a second on/off switch; a third on/off switch; a first sensor electrode; a fourth on/off switch; a second reference capacitance; a fifth on/off switch; a sixth on/off switch; a second sensor electrode; a comparator; switch controlling means for alternately repeating a second switch operation and a third switch operation following a first switch operation; counting means for counting a number of times for repeating the second switch operation; and judging means for judging changes in capacitances related to the first and second sensor electrodes, based upon the number of times for repeating the second switch operation counted by the counting means before a level of voltage at the first input terminal and a level of voltage at the second input terminal are reversed.Type: GrantFiled: September 7, 2007Date of Patent: August 3, 2010Assignee: Aisin Seiki Kabushiki KaishaInventors: Manabu Kato, Eiji Fujioka
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Patent number: 7650803Abstract: A biosignal intensity distribution measuring apparatus, includes a supporting member for supporting a human body, a plurality of detecting portions arranged in two dimensions within a target detection area of the supporting member, the detecting portions detecting pressure fluctuations and outputting signals corresponding to the pressure fluctuations respectively, a filter extracting a biosignal having a predetermined frequency band based from the signal outputted from each of the detecting portions, an intensity calculating portion calculating an intensity value of the biosignal, and an intensity distribution producing portion producing intensity distribution in which the intensity value corresponds to a position of the detecting portion.Type: GrantFiled: October 18, 2007Date of Patent: January 26, 2010Assignee: Aisin Seiki Kabushiki KaishaInventors: Mitsuhiro Ando, Shunsuke Kogure, Eiji Fujioka
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Patent number: 7602280Abstract: A tire pressure monitoring system includes tire-based transmitting and receiving devices and a vehicle body-based transmitting and receiving device having vehicle body-based receiving means, vehicle body-based transmitting means, wherein (2m?1)×(2n?1)?t is satisfied with t, m and n representing the number of the tire-based transmitting and receiving devices, the number of vehicle body-based transmitting groups and the number of vehicle body-based receiving groups respectively, each tire-based transmitting and receiving device receives the transmission request from any one of the vehicle body-based transmitting groups, the information transmitted from the tire-based transmitting and receiving device is received by any one of the vehicle body-based receiving groups, and each tire-based transmitting and receiving device has a different combination of the groups of the vehicle body-based transmitting means and the vehicle body-based receiving means.Type: GrantFiled: March 21, 2007Date of Patent: October 13, 2009Assignee: Aisin Seiki Kabushiki KaishaInventors: Manabu Kato, Eiji Fujioka
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Publication number: 20090009303Abstract: A communication system for a vehicle includes a portable identification device including a portion for receiving an interrogation signal and a portion for transmitting an indication indicative signal responsive to the interrogation signal, multiple tire sensor devices each of which includes a portion for receiving an initiation signal and a portion for transmitting a condition indicative signal responsive to the initiation signal, multiple transmitting devices each of which emits the interrogation signal and the initiation signal for different conditions within a communication area, a receiving device for receiving the indication indicative signal and the condition indicative signal, and a central controller for unlocking a door lock device when the portable identification device is determined to be in an overlapped area based on a condition of the portable identification device, the overlapped area being defined between two adjacent communication areas and in which the door lock device is involved.Type: ApplicationFiled: June 26, 2008Publication date: January 8, 2009Applicant: AISIN SEIKI KABUSHIKI KAISHAInventors: Eiji Fujioka, Manabu Kato
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Patent number: 7466123Abstract: A rotation sensor for outputting a pulse signal, which has a frequency corresponding to a rotation speed of a rotor, to a wire. The rotation sensor includes a modulation unit and an output unit. The modulation unit modulates an information signal representing information other than the rotation speed into a carrier wave having a frequency higher than the frequency of the pulse signal. The output unit superimposes and outputs to the wire the pulse signal and the carrier wave. Accordingly, the rotation sensor performs stable information transmission that is not dependent on the rotation speed of the rotor.Type: GrantFiled: February 21, 2005Date of Patent: December 16, 2008Assignee: Aisin Seiki Kabushiki KaishaInventors: Manabu Kato, Eiji Fujioka
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Patent number: 7454966Abstract: A receiving antenna RA of a receiving unit RU is positioned at an inner diameter side of a rotation locus of a transmitting unit TU when a tire T rotates. Consequently, it shortens a reaching distance of electromagnetic waves and lessens its change, thereby making it easy to keep a stable receiving sensitivity state. Moreover, the receiving antenna RA is made of a wire of a predetermined length that is made integral inside a wire harness WH connected to the receiving unit RU. Consequently, it becomes easy to make the receiving antenna RA in a length of ?/4 of a wavelength ? of the electromagnetic waves in use, a length of an integral multiple thereof, or ??. As a result, the receiving sensitivity can be improved.Type: GrantFiled: March 4, 2005Date of Patent: November 25, 2008Assignee: Aisin Seiki Kabushiki KaishaInventors: Eiji Fujioka, Manabu Kato
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Publication number: 20080252303Abstract: A capacitance detecting apparatus includes: a first on/off switch; a first reference capacitor; a second on/off switch; a third on/off switch; a first sensor electrode; a fourth on/off switch; a second reference capacitance; a fifth on/off switch; a sixth on/off switch; a second sensor electrode; a comparator; switch controlling means for alternately repeating a second switch operation and a third switch operation following a first switch operation; counting means for counting a number of times for repeating the second switch operation; and judging means for judging changes in capacitances related to the first and second sensor electrodes, based upon the number of times for repeating the second switch operation counted by the counting means before a level of voltage at the first input terminal and a level of voltage at the second input terminal are reversed.Type: ApplicationFiled: September 7, 2007Publication date: October 16, 2008Applicant: AISIN SEIKI KABUSHIKI KAISHAInventors: Manabu Kato, Eiji Fujioka
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Patent number: 7385493Abstract: A tire inflation pressure detection apparatus includes a detection portion provided in a tire of a vehicle for detecting a tire inflation pressure, a transmitting portion for wirelessly transmitting a signal of a tire inflation pressure information, a receiving portion for feeding the signal transmitted from the transmitting portion, a wheel speed sensor for detecting a rotational speed of a wheel of the tire, a control portion for feeding a signal from the wheel speed sensor and the signal from the receiving portion, an electric power source wire for connecting the wheel speed sensor to the control portion, a signal input wire for connecting the electric power source wire to the receiving portion, and a filter disposed at the electric power source wire between a connection point with the signal input wire and the control portion for blocking the signal transmitted from the transmitting portion.Type: GrantFiled: January 19, 2006Date of Patent: June 10, 2008Assignee: Aisin Seiki Kabushiki KaishaInventors: Manabu Kato, Eiji Fujioka
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Publication number: 20080103702Abstract: A biosignal intensity distribution measuring apparatus, includes a supporting member for supporting a human body, a plurality of detecting portions arranged in two dimensions within a target detection area of the supporting member, the detecting portions detecting pressure fluctuations and outputting signals corresponding to the pressure fluctuations respectively, a filter extracting a biosignal having a predetermined frequency band based from the signal outputted from each of the detecting portions, an intensity calculating portion calculating an intensity value of the biosignal, and an intensity distribution producing portion producing intensity distribution in which the intensity value corresponds to a position of the detecting portion.Type: ApplicationFiled: October 18, 2007Publication date: May 1, 2008Applicant: AISIN SEIKI KABUSHIKI KAISHAInventors: Mitsuhiro Ando, Shunsuke Kogure, Eiji Fujioka
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Patent number: 7316159Abstract: A tire information detecting device includes detecting means for detecting a state quantity in a tire, transmitting means for transmitting a signal outputted from the detecting means, receiving means for receiving the signal transmitted from the transmitting means, the receiving means mounted at a vehicle body side, and a brake actuator adjusted to apply a braking force to the vehicle. The receiving means is positioned at a radially inner side from a major diameter of the brake actuator.Type: GrantFiled: July 30, 2004Date of Patent: January 8, 2008Assignee: Aisin Seiki Kabushiki KaishaInventors: Eiji Fujioka, Manabu Kato, Katsuyoshi Shirai
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Publication number: 20070299578Abstract: A tire information detection device including a housing fixed to a support member made of a conductive material and arranged on a vehicle is provided. A wheel velocity sensor for detecting the rotation velocity of a wheel and a receiver for wirelessly receiving air pressure information of a tire are arranged in the housing. A controller performs control in accordance with the detected rotation velocity and the air pressure information received by the receiver. The receiver includes a wireless frequency input terminal electrically connected to the support member. Therefore, the tire information detection device includes the receiver that stably receives information such as air pressure of the tire with a low cost while also being capable of processing vehicle velocity information.Type: ApplicationFiled: August 19, 2005Publication date: December 27, 2007Applicant: AISIN SEIKI KABUSHIKI KAISHAInventors: Manabu Kato, Eiji Fujioka
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Publication number: 20070229242Abstract: A tire pressure monitoring system includes tire-based transmitting and receiving devices and a vehicle body-based transmitting and receiving device having vehicle body-based receiving means, vehicle body-based transmitting means, wherein (2m?1)×(2n?1)?t is satisfied with t, m and n representing the number of the tire-based transmitting and receiving devices, the number of vehicle body-based transmitting groups and the number of vehicle body-based receiving groups respectively, each tire-based transmitting and receiving device receives the transmission request from any one of the vehicle body-based transmitting groups, the information transmitted from the tire-based transmitting and receiving device is received by any one of the vehicle body-based receiving groups, and each tire-based transmitting and receiving device has a different combination of the groups of the vehicle body-based transmitting means and the vehicle body-based receiving means.Type: ApplicationFiled: March 21, 2007Publication date: October 4, 2007Applicant: AISIN SEIKI KABUSHIKI KAISHAInventors: Manabu Kato, Eiji Fujioka
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Publication number: 20070198150Abstract: To provide a system for monitoring the condition of a wheel that has a high mountability and can adequately transmit and receive measurement information about a wheel using radio wave transmission.Type: ApplicationFiled: March 8, 2005Publication date: August 23, 2007Inventors: Manabu Kato, Eiji Fujioka
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Publication number: 20070186635Abstract: A receiving antenna RA of a receiving unit RU is positioned at an inner diameter side of a rotation locus of a transmitting unit TU when a tire T rotates. Consequently, it shortens a reaching distance of electromagnetic waves and lessens its change, thereby making it easy to keep a stable receiving sensitivity state. Moreover, the receiving antenna RA is made of a wire of a predetermined length that is made integral inside a wire harness WH connected to the receiving unit RU. Consequently, it becomes easy to make the receiving antenna RA in a length of ?/4 of a wavelength ? of the electromagnetic waves in use, a length of an integral multiple thereof, or 5/8 ?. As a result, the receiving sensitivity can be improved.Type: ApplicationFiled: March 4, 2005Publication date: August 16, 2007Inventors: Eiji Fujioka, Manabu Kato
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Publication number: 20070170912Abstract: A rotation sensor for outputting a pulse signal, which has a frequency corresponding to a rotation speed of a rotor, to a wire. The rotation sensor includes a modulation unit and an output unit. The modulation unit modulates an information signal representing information other than the rotation speed into a carrier wave having a frequency higher than the frequency of the pulse signal. The output unit superimposes and outputs to the wire the pulse signal and the carrier wave. Accordingly, the rotation sensor performs stable information transmission that is not dependent on the rotation speed of the rotor.Type: ApplicationFiled: February 21, 2005Publication date: July 26, 2007Inventors: Manabu Kato, Eiji Fujioka
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Publication number: 20060170539Abstract: A tire inflation pressure detection apparatus includes a detection portion provided in a tire of a vehicle for detecting a tire inflation pressure, a transmitting portion for wirelessly transmitting a signal of a tire inflation pressure information, a receiving portion for feeding the signal transmitted from the transmitting portion, a wheel speed sensor for detecting a rotational speed of a wheel of the tire, a control portion for feeding a signal from the wheel speed sensor and the signal from the receiving portion, an electric power source wire for connecting the wheel speed sensor to the control portion, a signal input wire for connecting the electric power source wire to the receiving portion, and a filter disposed at the electric power source wire between a connection point with the signal input wire and the control portion for blocking the signal transmitted from the transmitting portion.Type: ApplicationFiled: January 19, 2006Publication date: August 3, 2006Inventors: Manabu Kato, Eiji Fujioka
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Publication number: 20050023896Abstract: A tire information detecting device includes detecting means for detecting a state quantity in a tire, transmitting means for transmitting a signal outputted from the detecting means, receiving means for receiving the signal transmitted from the transmitting means, the receiving means mounted at a vehicle body side, and a brake actuator adjusted to apply a braking force to the vehicle. The receiving means is positioned at a radially inner side from a major diameter of the brake actuator.Type: ApplicationFiled: July 30, 2004Publication date: February 3, 2005Inventors: Eiji Fujioka, Manabu Kato, Katsuyoshi Shirai