|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||702/150 ; 702/158 ; 702/166 ; 364/182 ; 364/474.35|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 16 인용 특허 : 4|
An improved absolute position detection method is provided for a stroke sensing cylinder which includes a magnetic scale detecting step for obtaining a plurality of sine wave form voltages having different phases using a magnetic sensor unit in accordance with a driving operation of the cylinder. A wave form generation step is also provided for converting the sine wave form voltage obtained in the magnetic scale detection step into a square wave form and generating a triangle wave form having the same period as the thusly converted square wave form. A fi...
[ What is claimed is:] [1.] In a method for detecting a magnetic flux change of a magnetic scale using a plurality of magnetic sensors with respect to the cylinder rod including at least one different magnetic scale processing period in a regularly protruded and recessed portion, signal-processing using a microcomputer and a 1/N-dividing counter, counting the thusly signal-processed wave forms, and judging an absolute position and direction with respect to a stroke of a cylinder, the improved method comprising the steps of:a magnetic scale detecting step...