Electronic system for detecting direction of motion
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01R-019/14
H03K-005/20
출원번호
US-0912405
(1978-06-05)
발명자
/ 주소
Desai Ashok K. (Chatsworth CA) Gami Bipinchandra V. (Woodland Hills CA) Dunstan Eric M. (Hidden Hills CA)
출원인 / 주소
Pertec Corporation (El Segundo CA 02)
인용정보
피인용 횟수 :
6인용 특허 :
0
초록▼
Apparatus for detecting the direction of motion from a reference signal, R, and a quadrature signal, Q, derived from the output signals X+0 and X+90 of a position transducer, wherein the polarity of the reference signal alternates with every fixed increment of motion of a transducer and the quadratu
Apparatus for detecting the direction of motion from a reference signal, R, and a quadrature signal, Q, derived from the output signals X+0 and X+90 of a position transducer, wherein the polarity of the reference signal alternates with every fixed increment of motion of a transducer and the quadrature signal which maintains phase difference of +90°or -90°with respect to the reference signal depending on the direction of motion, is comprised of: digital means for producing a narrow pulse, P, at each low-to-high transition of the quadrature signal and a narrow pulse, N, at each high-to-low transition of the quadrature signal; means for determining the direction of motion from these narrow pulses and the reference signal once during each half cycle of the reference signal, and means for storing this direction information until a subsequent determination is made in order to provide a continuous signal indicating the direction of motion.
대표청구항▼
An electronic system for determining the direction of motion operating on two alternating signals from position transducers spatially displaced 90°, comprising separate means for converting each of the alternating signals into logic signals of one voltage level for each half cycle of one polarity an
An electronic system for determining the direction of motion operating on two alternating signals from position transducers spatially displaced 90°, comprising separate means for converting each of the alternating signals into logic signals of one voltage level for each half cycle of one polarity and of another voltage level for each half cycle of opposite polarity, thereby producing a squarewave reference signal, R, from one alternating signal and a squarewave quadrature signal, Q, from the other alternating signal, said quadrature signal being +90°or -90°out of phase with the reference signal depending upon the direction of motion being sensed by said transducer, circuit means responsive to said quadrature signal for producing a pulse, P, at each signal level transition of a given polarity and a pulse, N, at each signal level transition of opposite polarity, logic means responsive to said reference signal R and to said pulses P and N to produce a forward signal, FWDPLS, for one quadrature phase relationship of the logic signals R and Q according to the logic function FWDPLS=RP+RN logic means responsive to said reference signal R and to the pulses P and N to produce a reverse signal, REVPLS, for another quadrature phase relationship of the logic signals R and Q according to the logic function REVPLS=RN+RP.
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이 특허를 인용한 특허 (6)
Pyrce, Philip R.; Meade, James P.; Wollen, Mark Alan; Baker, James Paul; Bishop, Jr., James A.; Niver, Ross Allan, Control system for a child swing.
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