초록 ▼

An integrated circuit for indicating the angular position of a rotating crankshaft corrected for crankshaft acceleration and deceleration. The circuit counts crankshaft markers spaced at equal angles about the crankshaft to produce a coarse grain position of the crankshaft. The circuit computes the

An integrated circuit for indicating the angular position of a rotating crankshaft corrected for crankshaft acceleration and deceleration. The circuit counts crankshaft markers spaced at equal angles about the crankshaft to produce a coarse grain position of the crankshaft. The circuit computes the time for the crankshaft to rotate to a series of incremental positions between contiguous markers and extrapolates a plurality of fine grain incremental positions of the crankshaft as a function of prior changes in velocity of the crankshaft. The coarse grain position is added to a fine grain position to produce a real time position of the crankshaft. A digital position bus communicates the real time crankshaft position. The circuit also computes both the velocity of the crankshaft after detecting each marker and the average acceleration of the crankshaft between contiguous markers for output over a digital velocity bus and a digital acceleration bus.

대표청구항 ▼

In a system for indicating the position of a rotating member with respect to a reference position, wherein the member has a plurality of markers spaced at substantially equal angles about the member, the markers defining a plurality of marker intervals, sensor means for generating a pulse signal in

In a system for indicating the position of a rotating member with respect to a reference position, wherein the member has a plurality of markers spaced at substantially equal angles about the member, the markers defining a plurality of marker intervals, sensor means for generating a pulse signal in response to detection of each of the markers, a position extrapolation circuit comprising: (a) computing means responsive to the pulse signals for computing the initial velocity of the member at the beginning of each marker interval; and (b) a digital velocity bus for communicating the initial velocity of the member.