发明名称 Magnetic linear position sensor
摘要 A magnetic linear position sensor includes an array of N number of magnets. The array of magnets is distributed along a line to form a magnetic field relay along the line. The sizes and positions of the magnets in the array of magnets are symmetric along the line, and the size of the magnets decreases from the sides of the array of magnets towards the center of the array of magnets. The magnetic linear position sensor further includes a magnetic field sensor spaced apart and positioned above the array of magnets. The magnetic field sensor moves back and forth over the array of magnets to sense the magnetic field of the array of magnets.
申请公布号 US8878522(B2) 申请公布日期 2014.11.04
申请号 US201113332029 申请日期 2011.12.20
申请人 GM Global Technology Operations, LLC 发明人 Zhou Xinyu;Niu Qiang;Johnston Kurt James;Benson Christopher G.;Smith Daniel J.;Carlson Eric Thomas;Ndiaye Moussa
分类号 G01B7/00 主分类号 G01B7/00
代理机构 代理人
主权项 1. A magnetic linear position sensor comprising: an array of N number of magnets distributed along a line to form a magnetic field relay along the line, the array of magnets including a first set of N1 magnets and a second set of N2, where N=N1+N2, the first set of N1 magnets being positioned on one side of a center of the array of magnets and the second set of N2 magnets being positioned on the other side of the center of the array of magnets, the size of the magnets decreasing from the sides of the array of magnets towards the center of the array of magnets; and a magnetic field sensor spaced apart and positioned above the array of magnets, wherein the magnetic field sensor moves back and forth over the array of magnets to sense the magnetic field of the array of magnets, the magnetic linear position sensor having performance characteristics that include a sensing range, a linearity of the magnets, a size of each magnet, and a sensor signal range, and wherein the performance characteristics are compared to sensor design characteristics to determine if the sensing range exceeds a minimum range, if the linearity is less than a maximum allowable value, if the sensor signal range exceeds a minimum value and is less than a maximum value, and if the total magnet size is less than a maximum value such that an optimal configuration of the array of magnets is set if the performance characteristics meet the sensor design objectives.
地址 Detroit MI US