公开(公告)号：US4353050A

公开(公告)日：1982-10-05

申请号：US159291

申请日：1980-06-13

申请人： Alan Pelczyk ,  Robert F. Purssell ,  Alfred J. Woollard ,  Albert L. Fowler ,  David M. Walker ,  Alan G. Henderson ,  Alastair K. Stevenson

发明人： Alan Pelczyk ,  Robert F. Purssell ,  Alfred J. Woollard ,  Albert L. Fowler ,  David M. Walker ,  Alan G. Henderson ,  Alastair K. Stevenson

IPC分类号： G01L9/00 ,  H01F21/02

CPC分类号： G01L9/007

摘要： A displacement-measuring transducer has a laminar member displaceable, for example under control of a vacuum actuator, within a housing containing respective pairs of coils spaced part in the displacement direction of the laminar member, which is provided with two apertures spaced apart in the said direction, such that the coupling between the coils of each pair is dependent upon the position of said apertures and, therefore, on the displacement of the laminar member.

摘要翻译： 位移测量传感器具有层状构件，例如在真空致动器的控制下，位于壳体内，该壳体包含在层状构件的位移方向上间隔开的一对线圈，所述线圈在所述层状构件的位移方向上间隔开，所述两个线圈在所述 方向，使得每对线圈之间的联接取决于所述孔的位置，因此取决于层状构件的位移。

公开(公告)号：US4284990A

公开(公告)日：1981-08-18

申请号：US126583

申请日：1980-03-03

申请人： Albert L. Fowler ,  Alan G. Henderson ,  Alastair K. Stevenson ,  David M. Walker

发明人： Albert L. Fowler ,  Alan G. Henderson ,  Alastair K. Stevenson ,  David M. Walker

IPC分类号： F02P7/06 ,  G08C9/04

CPC分类号： F02P7/061

摘要： A displacement transducer suitable for monitoring the angular rotation of an internal combustion engine is provided. The transducer comprises a rotary disc having a castellated periphery and mounted for rotation with the engine. First and second coils are mounted such that upon operation of the engine the castellations of the disc interrupt the inductive coupling therebetween. The first coil is fed with an oscillatory electrical signal which induces in the second coil an output signal of a first peak amplitude during the interruptions produced by the castellations and of a second peak amplitude during periods between the interruptions. Thresholding circuitry responsive to the output signal produces a control signal which is indicative of the commencement and cessation of the interruptions. In accordance with one disclosed embodiment, the threshold circuitry includes a pair of inverters sharing the same thermal environment. The first inverter is capacitively coupled to receive the output signal from the second coil, and the second inverter, which has its output connected to its input in a feedback arrangement, provides bias through a resistive coupling to the first inverter to compensate for temperature drifts, whereby the first inverter switches output signal states when its input signal passes through a preselected voltage level.

摘要翻译： 提供适于监测内燃机的角度旋转的位移传感器。 换能器包括具有雉形周边并且安装成与发动机一起旋转的旋转盘。 安装第一和第二线圈，使得在发动机操作时，盘的cast disc中断其间的电感耦合。 第一线圈被馈送振荡电信号，该振荡电信号在第二线圈处引起在由中心产生的中断期间的第一峰值幅度的输出信号，以及在中断期间的期间的第二峰值振幅。 响应于输出信号的阈值电路产生指示中断的开始和停止的控制信号。 根据一个公开的实施例，阈值电路包括共享相同热环境的一对逆变器。 第一反相器电容耦合以接收来自第二线圈的输出信号，并且其输出端以反馈装置连接到其输入端的第二反相器通过与第一反相器的电阻耦合提供偏置来补偿温度漂移， 由此第一反相器在其输入信号经过预选的电压电平时切换输出信号状态。