Abstract:
A rotation angle detector (1) includes: a multipolar magnet ring (2) magnetized multipolarly along a circumferential direction, at least one magnetic sensor group including three magnetic sensors (3) being placed along the circumferential direction of the multipolar magnet ring (2), and outputting angle information in association with the rotation of the multipolar magnet ring (2), the respective pieces of the angle information having a phase difference therebetween of 120 degrees in an electrical angle, and an arithmetic unit (4) configured to calculate a rotation angle of the multipolar magnet ring (2) based on the angle information outputted from the three magnetic sensors (3) included in the magnetic sensor group.
Abstract:
A method (1000) of determining a position (α) of a sensor device (1450) relative to an external magnetic field (Bext), comprising: providing currents to conductors to generate an internal magnetic field (Bint) that will superimpose with the external magnetic field (Bext), measuring field components of the combined magnetic field, calculating a position based on the applied currents and/or on the measured residual magnetic field. A position sensor (1450) for performing said method.
Abstract:
The invention relates to an angle measuring system comprising relative angle detecting means including a reference support whose rotation is regulated within a fixed range and a driving rotating body which is axially supported in a rotatable manner with respect to the reference support, the relative angle detecting means being configured to detect a relative rotation angle of the rotating body with respect to the reference support; and optical angle detecting means which is separated from the rotating body and the reference support and configured to optically detect a rotation angle of the reference support.
Abstract:
A measuring apparatus (100) for performing detection of a signal varying with displacement of an object and measurement of the displacement, includes a clock generator (70) configured to generate, in synchronization with a request signal for requesting measurement data, a first clock signal having a cycle shorter than a cycle of the request signal; a detector (10) configured to perform the detection with respect to each cycle of the first clock signal; an operation device (30) configured to obtain the measurement data based on an output of the detector (10); and a correction device (40) configured to obtain a displacement amount of the object per unit time based on a plurality of the measurement data, and correct the measurement data based on the obtained displacement amount and a time difference between the first clock signal relating to the measurement data and the first clock signal relating to the request signal.
Abstract:
A rotation angle detection device is provided which can detect a mechanical angle of a motor having any number of pole pairs. An electrical angle detected by an AMR sensor is multiplied by 1/2. In the mechanical angle region of 180° to 360° where the output of the AMR sensor does not match the output of a GMR sensor, there is an offset difference of 180° between the electrical angle of the AMR sensor and the electrical angle of the GMR sensor. In this case, an offset value of 180° is added to the electrical angle of the AMR sensor. Adding the offset value in this region makes the output of the AMR sensor match the output of the GMR sensor. The AMR sensor is thus corrected. A calculated angle of the AMR sensor which is obtained by the correction is detected according to a change in mechanical angle.
Abstract:
Die vorliegende Erfindung betrifft eine Positionsmesseinrichtung, umfassend einen Teilungsträger (14) mit einer Messteilung (16, 17), eine Abtasteinheit (12), die in einer Messrichtung relativ zur Messteilung (16, 17) beweglich angeordnet ist, zur Erzeugung von positionsabhängigen Abtastsignalen (S0, S90, R) durch Abtastung der Messteilung (16, 17), eine Signalverarbeitungseinheit (20, 120) zur Verarbeitung der Abtastsignale (S0, S90, R) zu Positionssignalen (P0 P90, PR) und eine Signalschnittstelle (50) über die die Positionssignale (P0 P90, PR) zu einer Folgeelektronik (80) ausgebbar sind. In der Signalverarbeitungseinheit (20, 120) ist wenigstens eine Korrektureinheit (20.1, 20.2, 20.3; 120.1, 120.2, 120.3) angeordnet, mit der wenigstens ein Signalfehler wenigstens eines Abtastsignals (S0, S90, R) korrigierbar ist, sowie eine Überwachungseinheit (30, 130) mit der das Erreichen eines Grenzwerts des Signalfehlers feststellbar und darauffolgend wenigstens die das Ereignis auslösende Korrektureinheit (20.1, 20.2, 20.3; 120.1, 120.2, 120.3) deaktivierbar ist. Weiter betrifft die Erfindung ein Verfahren zum Betreiben einer Positionsmesseinrichtung.
Abstract:
L'invention concerne un procédé de correction d'une mesure d'angle d'un rotor dans une machine électrique, obtenue par un capteur d'angle installé dans ladite machine électrique, caractérisé en ce qu'on acquiert (11) une pluralité de valeurs d'angle mesurées par ledit capteur d'angle pour une pluralité d'instants au cours de ladite révolution, on détermine (15) une cartographie fournissant des valeurs de correction d'angle en fonction d'un angle mesuré par ledit capteur, lesdites valeurs de correction d'angle correspondant à la différence entre les valeurs d'angle mesurées et les valeurs d'angles estimées pour un même instant de ladite pluralité d'instants, ladite cartographie permettant de corriger une valeur d'angle mesurée par ledit capteur d'angle lors du fonctionnement de la machine électrique.