Patents by Inventor Tamon Kasajima
Tamon Kasajima 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: 20220349960Abstract: To provide a small-sized magnetic sensor capable of achieving closed-loop control. A magnetic sensor includes: a sensor chip mounted on a surface of a substrate such that an element formation surface is perpendicular to the surface of the substrate or inclined by a predetermined angle with respect thereto; an external magnetic member mounted on the surface of the substrate and collecting a magnetic field to be detected in a magnetosensitive element; and a compensating coil wound around the external magnetic member. The compensating coil is thus wound around the external magnetic member, so that it is possible to cancel a magnetic field to be applied to the magnetosensitive element and to prevent the external magnetic member from being magnetically saturated.Type: ApplicationFiled: July 30, 2020Publication date: November 3, 2022Inventors: Taiju AKUSHICHI, Makoto KAMENO, Tamon KASAJIMA
-
Patent number: 10905011Abstract: A state detecting device which can be applied even in a severe environment. The state detecting device includes a chargeable all-solid-state battery, a piezoelectric element which supplies charging power to the all-solid-state battery, and an integrated circuit including various sensors which operate with electric power supplied from the all-solid-state battery. The all-solid-state battery, the piezoelectric element, and the integrated circuit are mounted on one surface of a flexible substrate. The flexible substrate is attached to a flexible object which is either an object to be measured or constitutes at least part of an inner surface of a space to be measured.Type: GrantFiled: March 16, 2018Date of Patent: January 26, 2021Assignee: TDK CorporationInventors: Masafumi Kami, Hiroshi Kobayashi, Tamon Kasajima
-
Publication number: 20200100363Abstract: A state detecting device which can be applied even in a severe environment. The state detecting device includes a chargeable all-solid-state battery, a piezoelectric element which supplies charging power to the all-solid-state battery, and an integrated circuit including various sensors which operate with electric power supplied from the all-solid-state battery. The all-solid-state battery, the piezoelectric element, and the integrated circuit are mounted on one surface of a flexible substrate. The flexible substrate is attached to a flexible object which is either an object to be measured or constitutes at least part of an inner surface of a space to be measured.Type: ApplicationFiled: March 16, 2018Publication date: March 26, 2020Inventors: Masafumi KAMI, Hiroshi KOBAYASHI, Tamon KASAJIMA
-
Publication number: 20190113544Abstract: Disclosed herein is a magnetic sensor that includes a saturable magnetic member that receives magnetic flux flowing in a first axis direction, and a detection coil wound around the saturable magnetic member and having a coil axis aligned with a predetermine direction different from the first axis direction.Type: ApplicationFiled: October 5, 2018Publication date: April 18, 2019Applicant: TDK CORPORATIONInventors: Takashi Osada, Takahiro Hamamura, Tamon Kasajima
-
Patent number: 10101413Abstract: A magnetic field detection device includes: a first magnetic field generating part, including a first magnetic field generating conductor; a first magnetic field detection part, including a first magnetic field detection element and a first differential operation part, wherein a first output of the first magnetic field detection element corresponding to the environment magnetic field is inputted into the first differential operation part, and a first feedback current flows into the first magnetic field generating conductor, and thus the first magnetic field generating part provides the first magnetic field detection element with a first feedback current magnetic field, with a direction opposite to the environment magnetic field; a second magnetic field generating part, including a second magnetic field generating conductor, in which a second current corresponding to the first feedback current flows; and a second magnetic field detection part, including a second magnetic field detection element.Type: GrantFiled: October 30, 2014Date of Patent: October 16, 2018Assignee: TDK CORPORATIONInventors: Tamon Kasajima, Kei Tanabe, Akihiro Ogawa
-
Patent number: 9983273Abstract: A magnetic field detecting sensor includes a bridge circuit which is connected to multiple magnetoresistive effect elements and is capable of outputting a differential voltage between specified connection points, a magnetic field generating conductor for providing the magnetoresistive effect elements with a magnetic field in a direction opposite to that of the detection magnetic field by disposing a magnetic body near the center of the bridge circuit, a differential operation circuit which the differential voltage is input in and makes a feedback current flow to the magnetic field generating conductor, wherein the feedback current generates the magnetic field in a direction opposite to that of the detection magnetic field in the magnetic field generating conductor, and a voltage converting circuit for outputting the feedback current as a voltage value. The magnetic field generating conductor and the magnetoresistive effect elements are formed in the same stacked body.Type: GrantFiled: May 14, 2015Date of Patent: May 29, 2018Assignee: TDK CORPORATIONInventors: Akihiro Ogawa, Tamon Kasajima, Kei Tanabe
-
Publication number: 20150331072Abstract: A magnetic field detecting sensor includes a bridge circuit which is connected to multiple magnetoresistive effect elements and is capable of outputting a differential voltage between specified connection points, a magnetic field generating conductor for providing the magnetoresistive effect elements with a magnetic field in a direction opposite to that of the detection magnetic field by disposing a magnetic body near the center of the bridge circuit, a differential operation circuit which the differential voltage is input in and makes a feedback current flow to the magnetic field generating conductor, wherein the feedback current generates the magnetic field in a direction opposite to that of the detection magnetic field in the magnetic field generating conductor, and a voltage converting circuit for outputting the feedback current as a voltage value. The magnetic field generating conductor and the magnetoresistive effect elements are formed in the same stacked body.Type: ApplicationFiled: May 14, 2015Publication date: November 19, 2015Inventors: Akihiro OGAWA, Tamon KASAJIMA, Kei TANABE
-
Publication number: 20150115938Abstract: A magnetic field detection device includes: a first magnetic field generating part, including a first magnetic field generating conductor; a first magnetic field detection part, including a first magnetic field detection element and a first differential operation part, wherein a first output of the first magnetic field detection element corresponding to the environment magnetic field is inputted into the first differential operation part, and a first feedback current flows into the first magnetic field generating conductor, and thus the first magnetic field generating part provides the first magnetic field detection element with a first feedback current magnetic field, with a direction opposite to the environment magnetic field; a second magnetic field generating part, including a second magnetic field generating conductor, in which a second current corresponding to the first feedback current flows; and a second magnetic field detection part, including a second magnetic field detection element.Type: ApplicationFiled: October 30, 2014Publication date: April 30, 2015Inventors: Tamon KASAJIMA, Kei TANABE, Akihiro OGAWA
-
Patent number: 8836317Abstract: A current sensor includes, a current-measured wiring including parallel wiring sections in which portions of the same wiring are arranged in parallel such that electric current to be measured flows therein in opposite directions each other; a magnetism detection unit which is arranged between parallel wirings located in the parallel wiring sections and detects a magnetic field in a direction perpendicular to a plane formed by the parallel wirings; a current detection unit which detects electric current flowing in the current-measured wiring, based on the magnetic field detected by the magnetism detection unit; and a magnetic core surrounding the parallel wiring sections so as to intensify the magnetic field generated around the parallel wirings located in the parallel wiring sections when electric current flows in the wirings.Type: GrantFiled: May 4, 2010Date of Patent: September 16, 2014Assignee: SAE Magnetics (H.K.) Ltd.Inventor: Tamon Kasajima
-
Patent number: 8735736Abstract: The electronic component module includes a substrate; an electronic component mounted on an electronic component mounting surface of the substrate; an insulating body that covers the electronic component on the electronic component mounting surface of the substrate; and a metal film formed by electroless plating, the metal film covering an exterior surface of the insulating body and a side surface of the substrate. The substrate has a space section in which a space is formed, the space being dented inward of the substrate in the periphery of a surface opposite to the electronic component mounting surface of the substrate, and the metal film entirely covers at least one side surface of the electronic component module except for at least a portion located on a surface perpendicular to the electronic component mounting surface of the substrate in the space section.Type: GrantFiled: October 21, 2011Date of Patent: May 27, 2014Assignee: SAE Magnetics (H.K.) Ltd.Inventors: Tamon Kasajima, Masashi Shiraishi
-
Publication number: 20130075143Abstract: The electronic component module includes a substrate; an electronic component mounted on an electronic component mounting surface of the substrate; an insulating body that covers the electronic component on the electronic component mounting surface of the substrate; and a metal film formed by electroless plating, the metal film covering an exterior surface of the insulating body and a side surface of the substrate. The substrate has a space section in which a space is formed, the space being dented inward of the substrate in the periphery of a surface opposite to the electronic component mounting surface of the substrate, and the metal film entirely covers at least one side surface of the electronic component module except for at least a portion located on a surface perpendicular to the electronic component mounting surface of the substrate in the space section.Type: ApplicationFiled: October 21, 2011Publication date: March 28, 2013Inventors: Tamon KASAJIMA, Masashi Shiraishi
-
Patent number: 8193805Abstract: A magnetic sensor capable of detecting a magnetic field with high sensitivity is provided. The magnetic sensor includes a bridge circuit having a plurality of magneto resistive effect elements connected with each other, and is capable of detecting a differential voltage between predetermined connecting points. The magneto resistive effect elements output resistance values which vary in accordance with a direction of a magnetic field to be input, and are arranged such that fixed magnetization directions of all magneto resistive effect elements are in the same direction. Further, a magnetic body which changes the direction of the magnetic field to be input to the magneto resistive effect elements is also provided in the vicinity of the bridge circuit.Type: GrantFiled: April 30, 2009Date of Patent: June 5, 2012Assignee: SAE Magnetics (H.K.) Ltd.Inventor: Tamon Kasajima
-
Patent number: 7960970Abstract: A magnetic sensor having a reduced size and cost is provided. More particularly, the magnetic sensor includes a magnetic field detection chip having a magnetic field detection element for detecting a magnetic field and an output terminal for outputting an output signal from the magnetic field detection element. A substrate has the magnetic field detection chip mounted thereon, and has a connection terminal for being connected to the output terminal of the magnetic field detection chip that is formed on a mount face of the substrate. An output-terminal formed face of the magnetic field detection chip is arranged non-parallel to the mount face of the substrate. More specifically, the output-terminal formed face of the magnetic field detection chip is arranged almost vertical to the mount face of the substrate.Type: GrantFiled: August 7, 2008Date of Patent: June 14, 2011Assignees: SAE Magnetics (H.K.) Ltd., TDK CorporationInventors: Tamon Kasajima, Shigeru Shoji
-
Patent number: 7956602Abstract: To provide a tilt angle sensor that is capable of detecting acceleration, a tilt angle, and the like of a device to which the tilt sensor angle is mounted, and also capable of reducing the size and the cost with a simple structure. The tilt angle sensor comprises: a spring member having a fixed end a free end that has a flexibility to be bent at least in one direction; a magnetic field generating device for generating a magnetic field, which is mounted at the free end of the spring member; a magnetic field detecting device provided by facing the magnetic field generating device for detecting a direction of the magnetic field generated by the magnetic field generating device; and a damping device for giving a damping force to a bending action of the spring member.Type: GrantFiled: April 2, 2008Date of Patent: June 7, 2011Assignee: SAE Magnetics (H.K.) Ltd.Inventors: Tamon Kasajima, Hiroyoshi Nakajima, Yong Jun Dong, Fu Yu
-
Publication number: 20100301835Abstract: A current sensor includes, a current-measured wiring including parallel wiring sections in which portions of the same wiring are arranged in parallel such that electric current to be measured flows therein in opposite directions each other; a magnetism detection unit which is arranged between parallel wirings located in the parallel wiring sections and detects a magnetic field in a direction perpendicular to a plane formed by the parallel wirings; a current detection unit which detects electric current flowing in the current-measured wiring, based on the magnetic field detected by the magnetism detection unit; and a magnetic core surrounding the parallel wiring sections so as to intensify the magnetic field generated around the parallel wirings located in the parallel wiring sections when electric current flows in the wirings.Type: ApplicationFiled: May 4, 2010Publication date: December 2, 2010Applicant: SAE Magnetics (H.K.) Ltd.Inventor: Tamon Kasajima
-
Patent number: 7621185Abstract: There is provided an acceleration sensor that is capable of detecting acceleration with high precision and capable of reducing the size and cost due to its simple structure. The acceleration sensor comprises: a pair of cantilevers arranged on a same straight line or almost in parallel in such a manner that positions of fixed ends and free ends are arranged to face in opposite directions from each other, and each of the free ends has a degree of freedom to deflect along a same direction; a pair of magnetic field generating devices mounted respectively to each of the free ends for generating magnetic fields; and a pair of magnetic field detecting devices arranged to face each of the magnetic field generating devices, respectively, for detecting directions of the magnetic fields generated by each of the magnetic field generating devices.Type: GrantFiled: July 26, 2006Date of Patent: November 24, 2009Assignee: SAE Magnetics (H.K.) Ltd.Inventor: Tamon Kasajima
-
Publication number: 20090284254Abstract: A magnetic sensor capable of detecting a magnetic field with high sensitivity is provided. The magnetic sensor includes a bridge circuit having a plurality of magneto resistive effect elements connected with each other, and is capable of detecting a differential voltage between predetermined connecting points. The magneto resistive effect elements output resistance values which vary in accordance with a direction of a magnetic field to be input, and are arranged such that fixed magnetization directions of all magneto resistive effect elements are in the same direction. Further, a magnetic body which changes the direction of the magnetic field to be input to the magneto resistive effect elements is also provided in the vicinity of the bridge circuit.Type: ApplicationFiled: April 30, 2009Publication date: November 19, 2009Applicant: SAE Magnetics (H.K.) Ltd.Inventor: Tamon Kasajima
-
Publication number: 20090195243Abstract: To provide a tilt angle sensor that is capable of detecting acceleration, a tilt angle, and the like of a device to which the tilt sensor angle is mounted, and also capable of reducing the size and the cost with a simple structure. The tilt angle sensor comprises: a spring member having a fixed end a free end that has a flexibility to be bent at least in one direction; a magnetic field generating device for generating a magnetic field, which is mounted at the free end of the spring member; a magnetic field detecting device provided by facing the magnetic field generating device for detecting a direction of the magnetic field generated by the magnetic field generating device; and a damping device for giving a damping force to a bending action of the spring member.Type: ApplicationFiled: April 2, 2008Publication date: August 6, 2009Applicant: SAE MAGNETICS (H.K) LTD.Inventors: Tamon KASAJIMA, Hiroyoshi NAKAJIMA, Yong Jun DONG, Fu YU
-
Patent number: 7555947Abstract: An air pressure sensor capable of measuring air pressure highly accurately with a simple configuration is provided. The sensor includes: a sealed case with a sealed space formed therein; a first thin plate member which constitutes at least a part of the wall of the sealed case and deforms to allow the capacity of the sealed space to vary corresponding to changes in the outside air pressure; a first PZT which contacts the first thin plate member to thereby detect the natural frequency thereof; and a second thin plate member which has the same vibration characteristics as those of the first thin plate member and is provided outside the sealed case while contacting it; and a second PZT which has the same temperature characteristics as those of the first PZT and contacts the second thin plate member to thereby detect the natural frequency thereof.Type: GrantFiled: September 14, 2007Date of Patent: July 7, 2009Assignee: SAE Magnetics (H.K.) Ltd.Inventor: Tamon Kasajima
-
Publication number: 20090045809Abstract: To provide a magnetic sensor that can be reduced in size and cost. Provided is a magnetic sensor which comprises: a magnetic field detection chip having a magnetic field detection element for detecting a magnetic field and an output terminal for outputting an output signal from the magnetic field detection element; and a substrate that has the magnetic field detection chip mounted thereon, and has a connection terminal for being connected to the output terminal of the magnetic field detection chip that is formed on a mount face of the substrate. An output-terminal formed face of the magnetic field detection chip is arranged not to be in parallel to the mount face of the substrate. More specifically, the output-terminal formed face of the magnetic field detection chip is arranged almost vertical to the mount face of the substrate.Type: ApplicationFiled: August 7, 2008Publication date: February 19, 2009Applicants: SAE MAGNETICS (H.K.) LTD., TDK CORPORATIONInventors: Tamon Kasajima, Shigeru Shoji