Patents Assigned to SIRC CO., LTD.
  • Publication number: 20210072044
    Abstract: An output system according to one aspect of the present invention includes a magnet disposed on an axis of a pointer of a gauge, first and second magnetic sensors that are each configured to have a sensitivity axial direction, and an output unit configured to output indicated value information generated based on detection values of the magnetic sensors. Also, first and second directions are set to intersect each other on the axis of the pointer, and the first magnetic sensor is disposed such that the sensitivity axial direction thereof extends in the first direction, and the second magnetic sensor is disposed such that the sensitivity axial direction thereof extends in the second direction.
    Type: Application
    Filed: July 24, 2018
    Publication date: March 11, 2021
    Applicants: UNIVERSITY PUBLIC CORPORATION OSAKA, SIRC CO., LTD.
    Inventors: Hiroaki TSUJIMOTO, Fumio NAKATSUJI
  • Patent number: 10048298
    Abstract: An electrical power measurement device measures electrical power consumed in a circuit to be measured including a power source, a load, and a pair of electric wires connecting the power source with the load. The device includes a sensor unit including a plurality of the sensor parts including a magnetic element in which element terminals are formed at both ends of a magnetic film, a measurement resistor connected to the magnetic element in series, and a detecting means that detects a voltage change of the magnetic element and outputs a predetermined component; an addition means that adds the outputs of the detecting means of all of the sensor parts; and a fixing means that fixes the magnetic elements of the sensor parts, at equal distance positions from a virtual axis serving as a position reference at which the one electric wire is arranged, in a direction facing the virtual axis.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: August 14, 2018
    Assignee: SIRC CO., LTD
    Inventor: Hiroaki Tsujimoto
  • Patent number: 9739812
    Abstract: A magnetoresistance effect type magnetic sensor has a problem in that the increase in the surrounding temperature decreases the magnetic characteristic of a magnetic film itself and thereby decreases the sensitivity of the sensor. A sensor element includes: a magnetic film having magnetoresistance effect; a pair of electrodes for applying an electric current to the magnetic film, the pair of electrodes being opposed across the magnetic film; a longitudinal bias magnetic field addition magnet to generate a first bias magnetic field in an opposing direction of the electrodes; and a lateral bias magnetic field addition magnet to generate a second bias magnetic field in an orthogonal direction to the longitudinal bias magnetic field addition magnet, in which a temperature characteristic of the longitudinal bias magnetic field addition magnet is higher than a temperature characteristic of the lateral bias magnetic field addition magnet.
    Type: Grant
    Filed: April 1, 2014
    Date of Patent: August 22, 2017
    Assignee: SIRC CO., LTD
    Inventor: Hiroaki Tsujimoto
  • Patent number: 9689902
    Abstract: When miniaturizing an ammeter or wattmeter, a magnetoresistance effect element given a barber-pole electrode could be considered an efficient device. It was considered that a barber-pole electrode formed at 45° with respect to an axis of easy magnetization (the longitudinal direction of a rectangular-shaped element) would be the most efficient. Current is refracted, however, when the current passes through the boundaries of substances with different conductivity, so a barber-pole electrode formed at 45° is not the most efficient. According to the invention, it is possible to provide a highly efficient magnetoresistance element having a rectangular magnetic film whereupon an axis of easy magnification is induced in the longitudinal direction, and a barber-pole electrode which is formed upon the magnetic film at an oblique angle ? to the longitudinal direction, where the magnetoresistance element takes into account current refraction at the boundary between the electrode and the magnetic film.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: June 27, 2017
    Assignee: SIRC CO., LTD
    Inventor: Hiroaki Tsujimoto
  • Patent number: 9329213
    Abstract: The present invention provides various thin-film sensor type power measuring apparatuses which can be constructed in a simplified and compact structure so as to measure the power of high-frequency circuits or batteries. This power measuring apparatus includes: a magnetic film disposed in parallel to a primary conductor through which a load current flows; a power supply with input and output terminals for supplying an element current to the magnetic film; a bias magnetic field applying unit for applying a DC magnetic field in a direction that is parallel, perpendicular, or diagonal to the direction of magnetization of the magnetic film; and a detection unit for detecting the voltage between the ends of the magnetic film in the direction of the element current. The power measuring apparatus detects only the DC voltage component between the ends of the magnetic film in the direction of the element current.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: May 3, 2016
    Assignee: SIRC CO., LTD.
    Inventor: Hiroaki Tsujimoto