公开(公告)号：EP1046124A4

公开(公告)日：2003-07-09

申请号：EP99905425

申请日：1999-01-08

申请人： UNIVERSAL INSTRUMENTS CORP

发明人： GOODE JOSEPH WILLIAM III ,  SMITH JOHN R ,  ASHCRAFT KENNETH D

IPC分类号： G01B7/30 ,  G06K20060101 ,  G06K1/00 ,  H03M1/48 ,  H03M1/64

CPC分类号： H03M1/645

摘要： The present invention is directed to a method and apparatus which utilizes a software-based digital signal processing circuit to generate a signal which is representative of the status of a movable component. A preferred embodiment of the apparatus of the present invention includes a synchro which is connected to a movable component. An analog reference excitation may be applied to the synchro, and the synchro generates analog synchro signals which bear a relationship to the status of the movable component. The analog synchro signals are converted to digital synchro signals by a plurality of analog-to-digital converters. A digital reference signal and the digital synchro signals are provided to a software-based digital signal processing circuit which preferably corrects constant and time-varying errors in the digital synchro signals and generates a status signal which is representative of the status of the movable component. For instance, the status signal may represent the angular position of the movable component. A different embodiment of the status signal may represent the angular velocity of the movable component.