Patents by Inventor Kazushi Yamanaka
Kazushi Yamanaka 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).
-
Publication number: 20230236191Abstract: The virus test device encompasses a pseudo-receptor film having pseudo-receptors mimicking a structure of a host-cell receptor, which binds specifically to a target virus, a virus introducing-tube for sucking down an air-under-test (AUT) containing the target viruses, to compress the AUT into a high-speed air-flow of aerosols-under-test, concentrating the target viruses contained in the AUT, and to eject the high-speed air-flow to the pseudo-receptor film, a signal conditioner for converting physical signals, which represent alterations of physical states of the pseudo-receptor film ascribable to specific bindings of the pseudo-receptors with the target viruses, to electric signals.Type: ApplicationFiled: February 9, 2023Publication date: July 27, 2023Inventors: Kazushi YAMANAKA, Nobuo TAKEDA, Shingo AKAO, Yusuke TSUKAHARA, Toru OIZUMI, Takamitsu IWAYA
-
Patent number: 11333631Abstract: System and method for measuring a gas concentration are provided. A ball sensor generates a collimated beam of a surface acoustic wave including fundamental wave of first frequency and harmonic wave of second frequency, which propagates through a orbital path on piezoelectric ball while passing through sensitive film to adsorb a target gas. Temperature control unit controls ball temperature of the ball sensor. Signal processing unit transmits a burst signal to sensor electrode of the ball sensor to excite the collimated beam, receives burst signals after the collimated beam has propagated a predetermined number of turns around the piezoelectric ball, and calculates the gas concentration and the ball temperature by first and second relative changes in delay times of the first and second frequencies, respectively, using waveform data of the burst signals.Type: GrantFiled: November 6, 2017Date of Patent: May 17, 2022Assignee: BALL WAVE INC.Inventors: Kazushi Yamanaka, Shingo Akao, Nobuo Takeda, Toshihiro Tsuji, Toru Oizumi, Yusuke Tsukahara
-
Patent number: 11313836Abstract: A collimated beam (23) of a surface acoustic wave propagates on a piezoelectric substrate (22) while passing through sensitive film (25) to adsorb a sensing gas. Signal processing unit (40) transmits an exciting burst signal to sensor electrode (24) to excite the collimated beam (23), receives first and second returned burst signals after the collimated beam (23) has propagated, and calculates a target gas parameter by a target leakage factor of the background gas and a relation between reference gas parameters and reference leakage factors of reference gases, the leakage factor is provided by first and second attenuations of the first and second returned burst signals, respectively, using waveform data of the first and second returned burst signals.Type: GrantFiled: January 30, 2019Date of Patent: April 26, 2022Assignee: BALL WAVE INCInventors: Kazushi Yamanaka, Nobuo Takeda, Shingo Akao, Toshihiro Tsuji, Toru Oizumi, Hideyuki Fukushi, Tatsuhiro Okano, Nagisa Sato, Yusuke Tsukahara
-
Patent number: 11307176Abstract: A standard-moisture generator includes a flow controller configured to control a flow of a gas, a dryer connected to the flow controller, configured to absorb water molecules in the gas and to generate a dry gas having a background moisture, a moisture cell connected to the dryer, configured to add an object moisture to the dry gas, and a delay member connected to the moisture cell, configured to pass the dry gas with a delay time depending on a concentration of the background moisture in the dry gas.Type: GrantFiled: February 12, 2019Date of Patent: April 19, 2022Assignee: Ball Wave Inc.Inventors: Yusuke Tsukahara, Osamu Hirayama, Nobuo Takeda, Toshihiro Tsuji, Kazushi Yamanaka, Toru Oizumi, Hideyuki Fukushi, Nagisa Sato, Shingo Akao, Tatsuhiro Okano
-
Publication number: 20210372978Abstract: A system for calibrating a moisture sensor encompasses a processing unit (341). The processing unit (341) includes a reference data obtaining LCKT (345), a subject data obtaining LCKT (346) and a relationship calculating LCKT (347). The reference data obtaining LCKT (345) obtains reference data, after injecting water-vapor with known concentrations into an analyzer. The subject data obtaining LCKT (346) measures subject data indicating temporal variation of output-responses of a subject sensor element of the analyzer under test. The relationship calculating LCKT (347) compares the subject data with the reference data, and calculates relationships between the output-responses of the subject sensor element and the known concentrations.Type: ApplicationFiled: August 9, 2021Publication date: December 2, 2021Inventors: Takamitsu IWAYA, Shingo AKAO, Tatsuhiro OKANO, Nobuo TAKEDA, Toshihiro TSUJI, Toru OIZUMI, Hideyuki FUKUSHI, Maki SUGAWARA, Yusuke TSUKAHARA, Kazushi YAMANAKA
-
Publication number: 20200400619Abstract: A standard-moisture generator includes a flow controller configured to control a flow of a gas, a dryer connected to the flow controller, configured to absorb water molecules in the gas and to generate a dry gas having a background moisture, a moisture cell connected to the dryer, configured to add an object moisture to the dry gas, and a delay member connected to the moisture cell, configured to pass the dry gas with a delay time depending on a concentration of the background moisture in the dry gas.Type: ApplicationFiled: February 12, 2019Publication date: December 24, 2020Applicant: Ball Wave Inc.Inventors: Yusuke TSUKAHARA, Osamu HIRAYAMA, Nobuo TAKEDA, Toshihiro TSUJI, Kazushi YAMANAKA, Toru OIZUMI, Hideyuki FUKUSHI, Nagisa SATO, Shingo AKAO, Tatsuhiro OKANO
-
Publication number: 20200225190Abstract: A collimated beam (23) of a surface acoustic wave propagates on a piezoelectric substrate (22) while passing through sensitive film (25) to adsorb a sensing gas. Signal processing unit (40) transmits an exciting burst signal to sensor electrode (24) to excite the collimated beam (23), receives first and second returned burst signals after the collimated beam (23) has propagated, and calculates a target gas parameter by a target leakage factor of the background gas and a relation between reference gas parameters and reference leakage factors of reference gases, the leakage factor is provided by first and second attenuations of the first and second returned burst signals, respectively, using waveform data of the first and second returned burst signals.Type: ApplicationFiled: January 30, 2019Publication date: July 16, 2020Applicant: Ball Wave Inc.Inventors: Kazushi YAMANAKA, Nobuo TAKEDA, Shingo AKAO, Toshihiro TSUJI, Toru OIZUMI, Hideyuki FUKUSHI, Tatsuhiro OKANO, Nagisa SATO, Yusuke TSUKAHARA
-
Publication number: 20190360966Abstract: System and method for measuring a gas concentration are provided. A ball sensor generates a collimated beam of a surface acoustic wave including fundamental wave of first frequency and harmonic wave of second frequency, which propagates through a orbital path on piezoelectric ball while passing through sensitive film to adsorb a target gas. Temperature control unit controls ball temperature of the ball sensor. Signal processing unit transmits a burst signal to sensor electrode of the ball sensor to excite the collimated beam, receives burst signals after the collimated beam has propagated a predetermined number of turns around the piezoelectric ball, and calculates the gas concentration and the ball temperature by first and second relative changes in delay times of the first and second frequencies, respectively, using waveform data of the burst signals.Type: ApplicationFiled: November 6, 2017Publication date: November 28, 2019Applicant: Ball Wave Inc.Inventors: Kazushi YAMANAKA, Shingo AKAO, Nobuo TAKEDA, Toshihiro TSUJI, Toru OIZUMI, Yusuke TSUKAHARA
-
Patent number: 10436757Abstract: When frequencies used in the two-frequency measurement of a SAW sensor are represented by f1 and f2 (f2>f1), an electrical signal processing device is provided without use of oversampling at a frequency higher than twice the frequency f2 or a two-system low-frequency conversion circuit, in which temperature compensation with the same accuracy as the case where these are used can be realized. Narrow band frequency filtering is applied to a waveform after roundtrips in a delay line type SAW sensor capable of transmitting and receiving multiple frequencies, the two frequencies f1 and f2 (f2>f1) are extracted, and a delay time is determined utilizing an aliasing obtained by applying undersampling at a frequency lower than twice the frequency f1.Type: GrantFiled: November 26, 2015Date of Patent: October 8, 2019Assignee: TOHOKU UNIVERSITYInventors: Kazushi Yamanaka, Toshihiro Tsuji, Toru Oizumi
-
Publication number: 20170307567Abstract: When frequencies used in the two-frequency measurement of a SAW sensor are represented by f1 and f2 (f2>f1), an electrical signal processing device is provided without use of oversampling at a frequency higher than twice the frequency f2 or a two-system low-frequency conversion circuit, in which temperature compensation with the same accuracy as the case where these are used can be realized. Narrow band frequency filtering is applied to a waveform after roundtrips in a delay line type SAW sensor capable of transmitting and receiving multiple frequencies, the two frequencies f1 and f2 (f2>f1) are extracted, and a delay time is determined utilizing an aliasing obtained by applying undersampling at a frequency lower than twice the frequency f1.Type: ApplicationFiled: November 26, 2015Publication date: October 26, 2017Applicant: TOHOKU UNIVERSITYInventors: Kazushi YAMANAKA, Toshihiro TSUJI, Toru OIZUMI
-
Patent number: 9726709Abstract: A semiconductor chip is provided with first and second electrode pads, a first current detector, and a third electrode pad. The first and second electrode pads are both to be wire-bonded to a first lead terminal. The first current detector is connected between the first and second electrode pads. The third electrode pad is wire-bonded to a second lead terminal. A first closed circuit is configured by the first lead terminal, the first electrode pad, the first current detector, and the second electrode pad. An induced current flows through the first closed circuit when a current generating an induced electromotive force is applied to the third electrode pad. The first current detector is configured to output different values depending on whether the induced current exceeds a threshold value or not.Type: GrantFiled: February 5, 2016Date of Patent: August 8, 2017Assignee: Toyota Jidosha Kabushiki KaishaInventors: Taro Kajiyama, Kazushi Yamanaka
-
Publication number: 20160231373Abstract: A semiconductor chip is provided with first and second electrode pads, a first current detector, and a third electrode pad. The first and second electrode pads are both to be wire-bonded to a first lead terminal. The first current detector is connected between the first and second electrode pads. The third electrode pad is wire-bonded to a second lead terminal. A first closed circuit is configured by the first lead terminal, the first electrode pad, the first current detector, and the second electrode pad. An induced current flows through the first closed circuit when a current generating an induced electromotive force is applied to the third electrode pad. The first current detector is configured to output different values depending on whether the induced current exceeds a threshold value or not.Type: ApplicationFiled: February 5, 2016Publication date: August 11, 2016Inventors: Taro Kajiyama, Kazushi Yamanaka
-
Patent number: 8559696Abstract: Scattered waves from the defect of burst ultrasonic waves radiated from an ultrasonic transmitter to a structure in two different arrangements of the ultrasonic transmitter and an array receiver are received by the array receiver so as to obtain a reception signal. The reception signal is subjected to a band-pass filter that passes a specific frequency component, shifted by different time according to the position of each reception sensor element of the array receiver and then, added so as to obtain a processing signal. On the basis of the processing signal, an image of the defect is obtained, respectively. A common portion of the obtained two images is extracted.Type: GrantFiled: May 19, 2009Date of Patent: October 15, 2013Assignee: Tohoku UniversityInventors: Kazushi Yamanaka, Yoshikazu Ohara, Yohei Shintaku
-
Patent number: 8220310Abstract: A gas analyzer that can be miniaturized and detect a wide variety of gases with high sensitivity, and a method of gas analysis. A separation column is configured so as to pass a sample gas together with a carrier gas through the inside thereof. A surface acoustic wave device has a base material with an annularly continuous annular surface formed of at least a part of a spherical surface; a surface acoustic wave generating means capable of generating a surface acoustic wave that propagates along the annular surface; and a plurality of reaction parts provided along the annular surface so as to change a predetermined physical quantity of the surface acoustic wave in response to the components of the sample gas. The surface acoustic wave device is arranged so that the sample gas passing through the separation column is reacted with the reaction parts.Type: GrantFiled: May 24, 2007Date of Patent: July 17, 2012Assignee: Tohoku UniversityInventors: Kazushi Yamanaka, Toshihiro Tsuji, Naoya Iwata
-
Patent number: 8106703Abstract: Booster circuit comprising: first transistor that is connected to first node; capacitor that has one end connected to first node, and that is charged with voltage of first node when first transistor is activated; and control signal generating circuit that provides control terminal of first transistor with control signal being in accordance with first clock, wherein when first transistor is de-activated, capacitor boosts voltage of first node to first voltage by voltage being applied to or end of capacitor, voltage applied to or end being at least ½ as great as first supply voltage, and control signal generating circuit sets voltage of control signal when first transistor is de-activated to be first voltage of first node, and sets voltage of control signal when first transistor is activated to be voltage, difference between voltage and first voltage being equal to or smaller than value of first supply voltage.Type: GrantFiled: May 10, 2010Date of Patent: January 31, 2012Assignees: Renesas Electronics Corporation, Toyota Jidosha Kabushiki KaishaInventors: Yoshihiro Nagai, Masakazu Amanai, Masahiko Kashimura, Masato Taki, Norihiro Honda, Kazushi Yamanaka
-
Patent number: 8004902Abstract: A nonvolatile memory device includes a memory cell that stores data by presence or absence of electrons accumulated in a floating gate, a read reference current generator that generates a read reference current for reading data from the memory cell based on a constant current from a constant current generator included therein, and a read voltage generator that generates a read voltage to be applied to a control gate of the memory cell during data reading. The read reference current generator generates a monitor voltage that varies according to variation of the read reference current and a threshold voltage of the memory cell. The read voltage generator generates the read voltage based on the monitor voltage.Type: GrantFiled: November 17, 2009Date of Patent: August 23, 2011Assignees: Renesas Electronics Corporation, Toyota Jidosha Kabushiki KaishaInventors: Masakazu Amanai, Masahiko Kashimura, Yoshihiro Nagai, Masato Taki, Norihiro Honda, Kazushi Yamanaka
-
Publication number: 20110123119Abstract: Scattered waves from the defect of burst ultrasonic waves radiated from an ultrasonic transmitter to a structure in two different arrangements of the ultrasonic transmitter and an array receiver are received by the array receiver so as to obtain a reception signal. The reception signal is subjected to a band-pass filter that passes a specific frequency component, shifted by different time according to the position of each reception sensor element of the array receiver and then, added so as to obtain a processing signal. On the basis of the processing signal, an image of the defect is obtained, respectively. A common portion of the obtained two images is extracted.Type: ApplicationFiled: May 19, 2009Publication date: May 26, 2011Applicant: TOHOKU UNIVERSITYInventors: Kazushi Yamanaka, Yoshikazu Ohara, Yohei Shintaku
-
Publication number: 20100301927Abstract: Booster circuit comprising: first transistor that is connected to first node; capacitor that has one end connected to first node, and that is charged with voltage of first node when first transistor is activated; and control signal generating circuit that provides control terminal of first transistor with control signal being in accordance with first clock, wherein when first transistor is de-activated, capacitor boosts voltage of first node to first voltage by voltage being applied to or end of capacitor, voltage applied to or end being at least ½ as great as first supply voltage, and control signal generating circuit sets voltage of control signal when first transistor is de-activated to be first voltage of first node, and sets voltage of control signal when first transistor is activated to be voltage, difference between voltage and first voltage being equal to or smaller than value of first supply voltage.Type: ApplicationFiled: May 10, 2010Publication date: December 2, 2010Applicants: NEC ELECTRONICS CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshihiro NAGAI, Masakazu AMANAI, Masahiko KASHIMURA, Masato TAKI, Norihiro HONDA, Kazushi YAMANAKA
-
Publication number: 20100124125Abstract: A nonvolatile memory device includes a memory cell that stores data by presence or absence of electrons accumulated in a floating gate, a read reference current generator that generates a read reference current for reading data from the memory cell based on a constant current from a constant current generator included therein, and a read voltage generator that generates a read voltage to be applied to a control gate of the memory cell during data reading. The read reference current generator generates a monitor voltage that varies according to variation of the read reference current and a threshold voltage of the memory cell. The read voltage generator generates the read voltage based on the monitor voltage.Type: ApplicationFiled: November 17, 2009Publication date: May 20, 2010Applicants: NEC ELECTRONICS CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masakazu AMANAI, Masahiko KASHIMURA, Yoshihiro NAGAI, Masato TAKI, Norihiro HONDA, Kazushi YAMANAKA
-
Publication number: 20100018288Abstract: The present invention provides a gas analyzer that can be miniaturized and detect a wide variety of gases with high sensitivity, and a method of gas analysis. A separation column 16 is configured so as to pass a sample gas together with a carrier gas through the inside thereof. A surface acoustic wave device 17 has a base material 21 with an annularly continuous annular surface formed of at least apart of a spherical surface; a surface acoustic wave generating means 22 capable of generating a surface acoustic wave that propagates along the annular surface; and a plurality of reaction parts 23 provided along the annular surface so as to change a predetermined physical quantity of the surface acoustic wave in response to the components of the sample gas. The surface acoustic wave device 17 is arranged so that the sample gas passing through the separation column 16 is reacted with the reaction parts 23.Type: ApplicationFiled: May 24, 2007Publication date: January 28, 2010Applicant: TOHOKU UNIVERSITYInventors: Kazushi Yamanaka, Toshihiro Tsuji, Naoya Iwata