Abstract

The output system pertaining to an aspect of the present invention is provided with a magnet disposed on an axis of an indicating needle of a meter, first and second magnetic sensors each configured so as to have a sensitivity axis direction, and an output unit configured so as to output indicated value information generated on the basis of detection values of the magnetic sensors. First and second directions are set so as to intersect on the axis of the indicating needle, the first magnetic sensor is disposed so that the sensitivity axis direction thereof is aligned with the first direction, and the second magnetic sensor is disposed so that the sensitivity axis direction thereof is aligned with the second direction.

IPC Classes  ?

• G01D 7/00 - Indicating measured values
• G01D 5/16 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying resistance
• G01D 13/26 - Pointers, e.g. settable pointer adapted to perform a further operation, e.g. making electrical contact

Abstract

A signal processing system according to one aspect of the present invention comprises: a receiving device that receives a signal; and a plurality of detection devices that detect the components of the differing frequencies of a current to be analyzed that flows to the receiving device corresponding to the received signal. Each detection device comprises: a magnetic element configured such that a resistance value changes according to a magnetic field generated by the current to be analyzed; a current source that outputs an alternating current of a predetermined frequency to the magnetic element; a filter that allows a current of a component of the sum or difference of the frequency of the current to be analyzed and the predetermined frequency to pass if the frequency of the signal is a specific frequency; and a detector that is disposed between the magnetic element and the filter and that detects a current flowing to a circuit including the magnetic element.

IPC Classes  ?

• G01R 23/165 - Spectrum analysisFourier analysis using filters
• G01R 15/20 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices
• G01R 19/00 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof

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.

IPC Classes  ?

• G01R 21/08 - Arrangements for measuring electric power or power factor by using galvanomagnetic-effect devices, e.g. Hall-effect devices
• G01R 33/09 - Magneto-resistive devices
• H01L 43/08 - Magnetic-field-controlled resistors

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.

IPC Classes  ?

• G01R 21/00 - Arrangements for measuring electric power or power factor
• G01R 21/08 - Arrangements for measuring electric power or power factor by using galvanomagnetic-effect devices, e.g. Hall-effect devices
• G01R 15/20 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices
• G01R 33/09 - Magneto-resistive devices
• G01R 17/10 - AC or DC measuring bridges

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 θ to the longitudinal direction, where the magnetoresistance element takes into account current refraction at the boundary between the electrode and the magnetic film.

IPC Classes  ?

• G01R 33/09 - Magneto-resistive devices
• G01R 15/20 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices
• H01L 43/08 - Magnetic-field-controlled resistors
• G01R 21/08 - Arrangements for measuring electric power or power factor by using galvanomagnetic-effect devices, e.g. Hall-effect devices
• H01L 43/02 - Devices using galvano-magnetic or similar magnetic effects; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof - Details

Abstract

A magnetoresistance effect magnetic sensor has a problem that the sensitivity thereof as a sensor lowers because the magnetic characteristic of a magnetic film itself lowers due to an increase in surrounding temperature. A sensor element characterized by comprising: a magnetic film having a magnetoresistance effect; a pair of electrodes facing each other with the magnetic film therebetween in order to pass a current through the magnetic film; a longitudinal bias magnetic field application magnet for generating a first bias magnetic field in a direction in which the electrodes face each other; and a lateral bias magnetic field application magnet for generating a second bias magnetic field in a direction perpendicular to the longitudinal bias magnetic field application magnet, and in that the temperature characteristic of the longitudinal bias magnetic field application magnet is larger than the temperature characteristic of the lateral bias magnetic field application magnet.

IPC Classes  ?

• G01R 33/09 - Magneto-resistive devices
• G01R 21/08 - Arrangements for measuring electric power or power factor by using galvanomagnetic-effect devices, e.g. Hall-effect devices
• H01L 43/08 - Magnetic-field-controlled resistors

Abstract

An electrical power meter that utilizes a magnetic thin film is required to be mountable to wiring that has already been disposed and to be able to define the positional relationship between the wiring and the magnetic thin film regardless of the position at which the power meter is attached to the wiring. Provided is an electrical power measurement device characterized by comprising the following: a sensor part that is connected to a circuit to be measured via a pair of connection terminals, and that is provided with the pair of connection terminals for connecting to a power source in parallel with a load, a magnetic element provided with element terminals on either end of a magnetic film, a measurement resistor connected in series to the magnetic element, and a detection means that detects voltage changes in the magnetic element and outputs a prescribed component; a sensor unit comprising a plurality of the sensor parts; an addition means that adds the outputs of the detection means of all of the sensor parts; and a securing means that secures the magnetic elements of the sensor parts in positions at equal distances from a virtual axis, which serves as a positional reference for disposing one electric wiring, in orientations facing the virtual axis.

IPC Classes  ?

• G01R 21/08 - Arrangements for measuring electric power or power factor by using galvanomagnetic-effect devices, e.g. Hall-effect devices
• G01R 11/06 - Magnetic circuits of induction meters
• G01R 11/12 - Arrangements of bearings

Abstract

When miniaturizing an ammeter or a 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 θ to the longitudinal direction, wherein the oblique angle θ is less than 45 degrees, where the magnetoresistance element takes into account current refraction at the boundary between the electrode and the magnetic film.

IPC Classes  ?

• H01L 43/08 - Magnetic-field-controlled resistors
• G01R 33/09 - Magneto-resistive devices

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.

IPC Classes  ?

• G01N 27/72 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
• G01R 33/12 - Measuring magnetic properties of articles or specimens of solids or fluids
• G01R 21/06 - Arrangements for measuring electric power or power factor by measuring current and voltage
• G01R 33/07 - Hall-effect devices
• G01R 21/08 - Arrangements for measuring electric power or power factor by using galvanomagnetic-effect devices, e.g. Hall-effect devices
• G01R 33/02 - Measuring direction or magnitude of magnetic fields or magnetic flux
• G01R 33/09 - Magneto-resistive devices