公开(公告)号：US4358828A

公开(公告)日：1982-11-09

申请号：US244340

申请日：1981-03-17

申请人： David L. Reid ,  Dennis O. Taylor ,  Donald J. Brott

发明人： David L. Reid ,  Dennis O. Taylor ,  Donald J. Brott

IPC分类号： G01P3/488 ,  G01P3/66 ,  G01P3/48

CPC分类号： G01P3/488 ,  G01P3/66

摘要： This disclosure relates to a system for measuring the instantaneous speed of an index point on a rotating part. The part may be a toothed gear or a wheel of an engine, and the index point may be an identifiable point on the part. The system comprises a sensor that is mounted adjacent the part, the sensor including two sensing elements that are spaced apart in the direction of movement of the point as the part rotates. As the point passes the sensor, it causes a first pulse to be produced by one element and then a second pulse to be produced by the other element. The system further includes circuitry that responds to the two time-spaced pulses and produces an indication of the time interval between the two pulses. This time interval is a function of the speed of the point which in turn is proportional to the rate of rotation of the part. In the instance where the part is attached to an engine flywheel, the time interval is also an inverse function of engine RPM.

摘要翻译： 本公开涉及一种用于测量旋转部件上的指示点的瞬时速度的系统。 该部件可以是齿轮或发动机的轮子，并且索引点可以是部件上的可识别点。 该系统包括邻近该部件安装的传感器，该传感器包括两个传感元件，该传感元件在该部件旋转时沿该点移动的方向间隔开。 当点通过传感器时，它使得由一个元件产生第一个脉冲，然后由另一个元件产生第二个脉冲。 该系统还包括响应两个时间间隔脉冲并产生两个脉冲之间的时间间隔的指示的电路。 该时间间隔是该点的速度的函数，该点的速度又与该部件的旋转速率成比例。 在零件连接到发动机飞轮的情况下，时间间隔也是发动机RPM的反向功能。