发明名称 |
Stroke amount detecting device |
摘要 |
A stroke amount detecting device includes a magnetism detecting unit, a first magnetic field generating unit and a second magnetic field generating unit. A magnetic pole of the first generating unit and a magnetic pole of the second generating unit, which are opposed to each other, have different polarities. A distance between a gap end of the first generating unit and a gap end of the second generating unit, which are located on a farther side of a rectilinear axis, is smaller than a distance between an open end of the first generating unit and an open end of the second generating unit, which are located on a closer side of the rectilinear axis. The magnetism detecting unit detects a stroke amount of an object based on a magnetic flux generated between the open end of the first generating unit and the open end of the second generating unit. |
申请公布号 |
US8829896(B2) |
申请公布日期 |
2014.09.09 |
申请号 |
US201213419731 |
申请日期 |
2012.03.14 |
申请人 |
Denso Corporation;Nippon Soken, Inc. |
发明人 |
Matsumoto Koichiro;Mizutani Akitoshi;Takeda Kenji |
分类号 |
G01B7/14;G01D3/028;G01D5/14 |
主分类号 |
G01B7/14 |
代理机构 |
Nixon & Vanderhye P.C. |
代理人 |
Nixon & Vanderhye P.C. |
主权项 |
1. A stroke amount detecting device for detecting a stroke of a detection object which moves rectilinearly, the device comprising:
a magnetism detecting unit that includes a magnetism sensing surface and is displaced on a rectilinear axis in accordance with the rectilinear movement of the detection object; and a first magnetic field generating unit and a second magnetic field generating unit that are disposed on one side of the rectilinear axis, wherein: the magnetism detecting unit is displaced relative to the first magnetic field generating unit and the second magnetic field generating unit; the first magnetic field generating unit and the second magnetic field generating unit are arranged to be spaced away from each other and opposed to each other in a direction of the stroke; a magnetic pole of the first magnetic field generating unit and a magnetic pole of the second magnetic field generating unit, which are opposed to each other, are magnetized so as to have different polarities; the first magnetic field generating unit and the second magnetic field generating unit are arranged such that a distance between a gap end of the first magnetic field generating unit and a gap end of the second magnetic field generating unit, which are located on a farther side of the rectilinear axis and are magnetized so as to have different polarities, is smaller than a distance between an open end of the first magnetic field generating unit and an open end of the second magnetic field generating unit, which are located on a closer side of the rectilinear axis; and the magnetism detecting unit is configured to detect an amount of the stroke of the detection object based on a magnetic flux generated between the open end of the first magnetic field generating unit and the open end of the second magnetic field generating unit. |
地址 |
Kariya JP |