公开(公告)号：US3480803A

公开(公告)日：1969-11-25

申请号：US3480803D

申请日：1965-10-20

Applicant: GEN MOTORS CORP

Inventor： JAMERSON FRANK E ,  LEFFERT CHARLES B ,  REES DAVID B

IPC: H01J45/00 ,  H02N3/00 ,  H02N7/00

CPC classification number: H01J45/00

公开(公告)号：US3593136A

公开(公告)日：1971-07-13

申请号：US3593136D

申请日：1969-09-11

Applicant: GEN MOTORS CORP

Inventor： CHAPMAN FREDERICK W ,  JAMERSON FRANK E ,  MUENCH NILS L

IPC: G01P3/481 ,  G01P3/36

CPC classification number: G01P3/481

Abstract: A rotating member speed sensor in which microwaves are beamed toward the rotating member so as to be reflected from a surface of the rotating member to a detector. The surface of the rotating member has grooves therein so as to amplitude modulate the beamed microwaves such that the reflected microwaves as sensed by the detector have a frequency of modulation corresponding to the speed of rotation of the rotating member.