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公开(公告)号：US4639807A
公开(公告)日：1987-01-27
申请号：US475519
申请日：1983-03-15
申请人： Sadao Sekizawa , Toshio Seki , Tadashi Takahashi
发明人： Sadao Sekizawa , Toshio Seki , Tadashi Takahashi
CPC分类号： G01D5/145 , G11B5/3903
摘要： A magnetic detector for detecting the angle, position speed of rotation of a rotating body or the rectinear position, distance or speed of a rectinearly moving body is used opposite to a magnetic recording medium. The magnetic detector includes a plurality of elongated stripe-shaped magnetoresistive elements juxtaposed on a non-magnetic substrate. Bridge output terminals are provided adjoining to first identical ends of the respective magnetoresistive elements in the longitudinal directions thereof while common terminals are disposed adjoining to second ends of the magnetoresistive elements. Either bridge output or common terminals extend round the outside of the magnetoresistive elements to positions adjacent to the common or bridge output terminals. Thus, the total width of the magnetoresistive elements pattern can be greatly reduced, thereby providing a magnetic detector of high performance in which the influence of fluctuations of gap or spacing between the magnetic detector and the magnetic recording medium used together therewith.
摘要翻译： 用于检测旋转体的旋转角度，旋转位置速度或矫直位置的磁性检测器，与磁记录介质相反地使用整体移动体的距离或速度。 磁检测器包括并列在非磁性衬底上的多个细长条状磁阻元件。 桥式输出端子被设置成相邻于相应磁阻元件的纵向方向上的第一相同端部，而公共端子邻近磁阻元件的第二端设置。 桥接输出或公共端子在磁阻元件的外部延伸到与公共或桥接输出端子相邻的位置。 因此，可以大大减小磁阻元件图案的总宽度，从而提供高性能的磁性检测器，其中磁检测器和磁记录介质之间的间隙或间隔的波动的影响与其一起使用。
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2.发明授权
公开(公告)号：US4853632A
公开(公告)日：1989-08-01
申请号：US324669
申请日：1981-11-24
申请人： Yoosuke Nagano , Sadao Sekizawa , Toshio Seki
发明人： Yoosuke Nagano , Sadao Sekizawa , Toshio Seki
CPC分类号： G01D5/147
摘要： An apparatus for magnetically detecting a position of a movable magnetic body includes a three-terminal magnetic field-intensity sensing structure formed by a pair of magneto-resistors. The magnetic field-intensity sensing structure is disposed opposite to a magnetic body arranged for movement relative thereto in a magnetic field and generates a first electrical signal of sinusoidal waveform in response to a change in the intensity of the magnetic field due to the relative movement of the magnetic body. This first electrical signal appears from the apparatus as a second electrical signal of rectangular waveform or of sinusoidal waveform having an amplified amplitude. Components of the circuit for shaping the waveform of or amplifying the amplitude of the first electrical signal are integrally mounted together with the magneto-resistors on a substrate. Preferably, the shaping or amplifying circuit is in the form of a hybrid integrated circuit formed on the substrate.
摘要翻译： 用于磁性检测可移动磁体的位置的装置包括由一对磁阻电阻器形成的三端子磁场强度感测结构。 磁场强度感测结构被布置成与在磁场中相对于其移动的磁体相对设置，并且响应于由于相对运动导致的磁场强度的变化而产生正弦波形的第一电信号 磁体。 该第一电信号作为矩形波形或具有放大幅度的正弦波形的第二电信号从装置出现。 用于整形第一电信号的波形或放大第一电信号的幅度的电路的部件与磁阻电阻一体地安装在基板上。 优选地，整形或放大电路是形成在衬底上的混合集成电路的形式。
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公开(公告)号：USRE34355E
公开(公告)日：1993-08-24
申请号：US686996
申请日：1991-04-18
CPC分类号： G01D5/145 , G01D5/16 , G01P13/045 , G01P3/487
摘要： The invention discloses a movement detecting device for detecting the movement state of a moving body such as a rotating body, in which a magnetic recording medium on which N and S magnetic poles are alternately recorded at a constant interval is fixed symmetrically with respect to a rotary shaft of a rotating body whose rotation state is to be detected, and an MR element comprising magnet-resistive elements is mounted at a fixed position relative to the magnetic recording medium so that the rotation state of the rotating body can be detected from variation of the values of resistance of the magnet-resistive elements caused by the rotation of the body. N and S poles are recorded on the magnetic recording medium with a small pole pitch P. The magnet-resistive elements are formed to have a width sufficiently smaller than the pole pitch. The magnet-resistive elements constitute a first group and a second group, the magnet-resistive elements of each group being disposed with an interval equal to the pole pitch or half the pole pitch. The magnet-resistive elements are disposed in such a manner that the interval between the groups is deviated from the pole pitch, whereby a circuit comprising these magnet-resistive elements can detect the rotation of the rotating body.
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公开(公告)号：US4628259A
公开(公告)日：1986-12-09
申请号：US306233
申请日：1981-09-28
CPC分类号： G01D5/145 , G01D5/16 , G01P13/045 , G01P3/487
摘要： The invention discloses a movement detecting device for detecting the movement state of a moving body such as a rotating body, in which a magnetic recording medium on which N and S magnetic poles are alternately recorded at a constant interval is fixed symmetrically with respect to a rotary shaft of a rotating body whose rotation state is to be detected, and an MR element comprising magnet-resistive elements is mounted at a fixed position relative to the magnetic recording medium so that the rotation state of the rotating body can be detected from variation of the values of resistance of the magnet-resistive elements caused by the rotation of the body. N and S poles are recorded on the magnetic recording medium with a small pole pitch P. The magnet-resistive elements are formed to have a width sufficiently smaller than the pole pitch. The magnet-resistive elements constitute a first group and a second group, the magnet-resistive elements of each group being disposed with an interval equal to the pole pitch or half the pole pitch. The magnet-resistive elements are disposed in such a manner that the interval between the groups is deviated from the pole pitch, whereby a circuit comprising these magnet-resistive elements can detect the rotation of the rotating body.
摘要翻译： 本发明公开了一种用于检测诸如旋转体的移动体的运动状态的运动检测装置，其中以一定间隔交替记录N和S磁极的磁记录介质相对于旋转体对称地固定 轴，其旋转状态要被检测，并且包括磁阻元件的MR元件安装在相对于磁记录介质的固定位置处，从而可以根据变化来检测旋转体的旋转状态 由身体的旋转引起的磁阻元件的电阻值。 N极和S极以小的极间距P记录在磁记录介质上。磁阻元件形成为具有足够小于极间距的宽度。 磁阻元件构成第一组和第二组，每组的磁阻元件以等于极间距或极间距的一半的间隔设置。 磁阻元件以这样的方式设置，使得组之间的间隔偏离极间距，由此包括这些磁阻元件的电路可以检测旋转体的旋转。
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