Patent application number | Description | Published |
20100045275 | ROTARY OR LINEAR POSITION SENSOR HAVING AVARIABLE MAGNET PROFILE - The invention relates to a magnetic angular or linear sensor including at least one permanent magnet defined in a cylindrical (r, Q & z) or Cartesian (x, y & z) coordinate system and at least two magneto-sensitive elements, in which the magnet can move in relation to said two magneto-sensitive elements. The invention is characterized in that at least one dimension of the magnet varies as a non-constant function and in that the magnetization of the magnets is oriented in a single direction, i.e. x, y or z in the case of a magnet defined in a Cartesian coordinate system or r, Q or z in the case of a magnet defined in a cylindrical coordinate system. | 02-25-2010 |
20110043194 | VARIABLE RELUCTANCE POSITION SENSOR - A variable reluctance analog position device designed to determine the position variation of a target made from a ferromagnetic material. The device includes at least one magnet, the target and the magnet defining a gap therebetween. A magnetosensitive element detects induction variation produced in the gap by relative movement of the target relative to the magnet. The magnet is magnetized in a direction essentially perpendicular to the front surface of the magnet, which defines one edge of the gap. The magnet includes a cavity open at the front surface thereof and the magnetosensitive element is housed in the cavity. Moreover, the target is provided with a specific geometric configuration determined such that the induction variation according to the position of the target corresponds to a pre-defined function. | 02-24-2011 |
20110175600 | MAGNETIC ANGULAR POSITION SENSOR FOR A COURSE UP TO 360 DEGREES - The invention relates to an angular position sensor comprising a moving element consisting of at least one essentially cylindrical permanent magnet ( | 07-21-2011 |
20110254543 | MAGNETIC POSITION SENSOR WITH FIELD DIRECTION MEASUREMENT AND FLUX COLLECTOR - The present disclosure relates to a magnetic position sensor with field direction measurement and a flux collector. The disclosure proposes to measure two magnetic induction components at one and the same point, harmonizing the amplitude of the two magnetic induction components using flux collectors so as to have a ratio of the amplitudes of these two components close to one. For this purpose, the disclosure provides a contactless position sensor including at least one permanent magnet, emitting a magnetic field, at least one detection element sensitive to the direction of the magnetic field, and at least one pair of flux collectors, the permanent magnet being capable of moving in a direction of displacement and having a direction of magnetization that can be continuously varied according to the direction of displacement. Each flux collector has at least one portion, provided with an end, extending substantially along the direction of displacement of the magnet. The ends of a pair of flux collectors define a gap oriented along the direction of displacement of the magnet. The detection element is positioned outside the gap and substantially equidistant from the ends. | 10-20-2011 |
20110267040 | LINEAR OR ROTARY POSITION SENSOR WITH A PERMANENT MAGNET FOR DETECTING A FERROMAGNETIC TARGET - The disclosure relates to a contactless magnetic sensor for measuring the angular or linear movement of a ferromagnetic target. The purpose of the disclosure is to make a position sensor having reduced dimensions and capable of detecting a piece of position information as soon as the sensor is powered without degrading the performance thereof. To this end, the disclosure relates to a mobile sensor that includes at least one permanent magnet, at least one ferromagnetic member at least one magnetically sensitive member, the permanent magnet having an upper surface opposite the ferromagnetic target, wherein the permanent magnet has a substantially cylindrical or parallelepiped shape and includes a cavity, the ferromagnetic member being arranged inside the cavity and the magnetically sensitive member being arranged inside the cavity above the ferromagnetic member and below the upper surface of the magnet. | 11-03-2011 |
20120161755 | ANGULAR OR LINEAR MAGNETIC POSITION SENSOR NOT SENSITIVE TO EXTERNAL FIELDS - The invention relates to an angular or linear magnetic position sensor that comprises a mobile member including at least one magnet ( | 06-28-2012 |
20130057258 | POSITION SENSOR USING A MOVEABLE FERROMAGNETIC ELEMENT - The invention relates to a contactless magnetic sensor for detecting a linear or angular position, comprising a moveable ferromagnetic element ( | 03-07-2013 |
20130179117 | POSITION SENSOR - The disclosure relates in particular to a method for parameterizing a system for measuring an absolute position, the system including a permanent magnet, at least one probe that is mobile relative to the magnet over a given path, and a controller providing position information calculated on the basis of the arctangent of the ratio, wherein a correction coefficient G is assigned, between the output signals of the probe, wherein the signals are pseudo-sinusoidal and squared. The method includes an optimization operation that involves selecting the value of the coefficient G that minimizes the errors of the measurement system resulting from the pseudo-sinusoidal character of the signals output from the probe. | 07-11-2013 |