公开(公告)号：US4095177A

公开(公告)日：1978-06-13

申请号：US747468

申请日：1976-12-03

申请人： Geoffrey John Harris

发明人： Geoffrey John Harris

IPC分类号： G01P3/46 ,  G01P3/49 ,  G01P13/04 ,  H01F29/10 ,  H02K17/42

CPC分类号： H02K17/42 ,  G01P13/045 ,  G01P3/465 ,  G01P3/49 ,  H01F29/10

摘要： A transducer to monitor velocity and direction of movement having a magnetic core with at least three spaced apart poles. Two of the poles include coils which are wired series aiding for connection to an input alternating voltage, which upon current flow create a magnetic field intersecting the path of movement of an object being monitored. The third pole includes a coil in which an alternating output voltage is induced when the monitored object moves. The magnitude of such output voltage varies with the rate of speed of the monitored object. The phase relationship of output voltage to input voltage varies with the direction in which the monitored object moves. The coil in the third pole is connected to responsive means to receive the output signal and control, or indicate, the speed as well as the direction of movement of the monitored object.