| 摘要 |
PURPOSE:To enable detection of abnormality of a detector itself and a route of signal and to eliminate the state of noncontrol by converting a velocity detection signal and a position detection signal into signals of the same dimension and the same mode and by comparing them thereafter. CONSTITUTION:A velocity detector 11 such as a pilot generator PG and a position detector 12 such as a pulse generator PLG detect the velocity and position themselves in an automatic positioning control system, respectively, and deliver a velocity signal S1 and a position signal S2. The respective signals S1 and S2 are converted into signals S3 and S4 of the same dimension and mode with each other in operation circuits 13 and 14 and supplied to a comparator circuit 15 which outputs an abnormality signal S5 when a difference exceeding a prescribed set value is caused between the two converted signals. |
