Rotor position indicator with correction for apparant acceleration and deceleration

Claim 2

In a system for measuring the angle of a rotating rotor having a reference position and a plurality of markings spaced about the rotor, an angle measuring device for indicating the position of the rotor relative to the reference position, comprising: sensor means for detecting the rotor markings and generating a sensor signal in response thereto; and indicator means, responsive to said sensor signal, for generating a position signal indicative of the angular position of the rotor relative to the reference position, said indicator means including means for correcting to force said position signal to count to a predetermined maximum number between adjacent sensor signals.

Claim 3

An angle measuring device for measuring the angle of a rotating rotor, according to claim 1, wherein said correction means includes means for forcing said position signal to stall.

Claim 4

An angle measuring device for measuring the angle of a rotating rotor, according to claim 1, wherein said indicator means includes means for measuring the time between sensor signals and comparison means for comparing at least one of said measured times against at least one predetermined value and wherein said correction means is responsive to said comparison means.

Claim 5

An angle measuring device for measuring the angle of a rotating rotor, according to claim 1, wherein said position signal is a binary value which is capable of reaching a number substantially greater than the number of markings on the rotor.

Claim 6

An angle measuring device for measuring the angle of a rotating rotor, according to claim 4, wherein said binary value comprises an integer part and a fractional part.

Claim 7

An angle measuring device for measuring the angle of a rotating rotor, according to claim 5, wherein said correction means includes means for stalling the fractional part of the binary value until another sensor signal is generated by the sensor means.

Claim 8

An angle measuring device for measuring the angle of a rotating rotor, according to claim 5, wherein said correction means includes means for spurting the fractional part of the binary value until the integer part of the binary value is incremented.

Claim 9

An angle measuring device for measuring the angle of a rotating rotor, according to claim 1, wherein said indicator means further includes: timing means for measuring the time between said sensor signals, and interpolation means, responsive to said time measured between said sensor signals, for generating a signal indicative of the relative angular position between sensor signals; wherein said correction means is responsive to said interpolation means.

Claim 10

In a system for measuring the angle of a rotating rotor having a reference position and a plurality of markings spaced about the rotor, an angle measuring device for indicating the position of the rotor relative to the reference position, comprising: sensor means for detecting the rotor markings and generating a sensor signal in response thereto; indicator means, responsive to said sensor signal, for generating a position signal indicative of the angular position of the rotor relative to the reference position, said indicator means including means for correcting said position signal in response to each sensor signal; and wherein said correction means includes means for forcing said position signal to stall.

Claim 11

In a system for measuring the angle of a rotating rotor having a reference position and a plurality of markings spaced about the rotor, an angle measuring device for indicating the position of the rotor relative to the reference position, comprising: sensor means for detecting the rotor markings and generating a sensor signal in response thereto; indicator means, responsive to said sensor signal, for generating a position signal indicative of the angular position of the rotor relative to the reference position, said indicator means including means for correcting said position signal in response to each sensor signal; and wherein said correction means includes means for forcing said position signal to stall.

Claim 12

An angle measuring device for measuring the angle of a rotating rotor, according to claim 9, wherein said correction means includes means for forcing said position signal to spurt ahead.

Claim 13

In a system for measuring the angle of a rotating rotor having a reference position and a plurality of markings spaced about the rotor, an angle measuring device for indicating the position of the rotor relative to the reference position, comprising: sensor means for detecting the rotor markings and generating a sensor signal in response thereto; indicator means, responsive to said sensor signal, for generating a position signal indicative of the angular position of the rotor relative to the reference position, said indicator means including means for correcting said position signal in response to each sensor signal; and wherein said indicator means includes means for measuring the time between sensor signals and comparison means for comparing at least one of said measured times against at least one predetermined value and wherein said correction means is responsive to said comparison means.

Claim 14

In a system for measuring the angle of a rotating rotor having a reference position and a plurality of markings spaced about the rotor, an angle measuring device for indicating the position of the rotor relative to the reference position, comprising: sensor means for detecting the rotor markings and generating a sensor signal in response thereto; indicator means, responsive to said sensor signal, for generating a position signal indicative of the angular position of the rotor relative to the reference position, said indicator means including means for correcting said position signal in response to each sensor signal; and wherein said indicator means includes means for measuring the time between sensor signals and comparison means for comparing at least one of said measured times against at least one predetermined value and wherein said correction means is responsive to said comparison means.

Claim 15

An angle measuring device for measuring the angle of a rotating rotor, according to claim 11, wherein said at least one predetermined value includes a value representative of a time period after which a sensor signal is expected.

Claim 16

An angle measuring device for measuring the angle of a rotating rotor, according to claim 11, wherein said at least one predetermined value includes a value representative of a previously measured time between sensor signals.

Claim 17

An arrangement for actuating an external event in a predictive manner according to the angular position of a rotating rotor having a plurality of spaced markings thereon, the arrangement comprising: first sensor means for generating a reference signal indicative of a reference position of the rotor; second sensor means for detecting the markings and generating a sensor signal in response thereto; indicator means, responsive to said sensor signal, for generating a present position signal indicative, at least in part, of the relative number of markings, and including correction means for correcting said position signal by appropriately spurting and stalling the position signal in response to each sensor signal; calculation means, responsive to said present position signal and said reference signal, for calculating a position signal indicative of a future predetermined position of the rotor; means, responsive to said present position signal and said calculated position signal, for actuating the external event when said present position signal indicates that the present position of the rotor is equal to the predetermined position of the rotor.

Claim 18

An arrangement for actuating an external event in a predictive manner according to the angular position of a rotating rotor having a plurality of spaced markings thereon, the arrangement comprising: first sensor means for generating a reference signal indicative of a reference position of the rotor; second sensor means for detecting the markings and generating a sensor signal in response thereto; indicator means, responsive to said sensor signal, for generating a present position signal indicative, at least in part, of the relative number of markings, and including correction means for correcting said position signal by appropriately spurting and stalling the position signal in response to each sensor signal; calculation means, responsive to said present position signal and said reference signal, for calculating a position signal indicative of a future predetermined position of the rotor; means, responsive to said present position signal and said calculated position signal, for actuating the external event when said present position signal indicates that the present position of the rotor is equal to the predetermined position of the rotor.

Claim 19

An arrangement for actuating an external event in a predictive manner, according to claim 14, wherein said indicator means includes means to record the present position signal when the reference signal is generated.

Claim 20

An arrangement for actuating an external event in a predictive manner, according to claim 14, wherein said present position signal is further indicative of the time period between two of said markings.

Claim 21

An arrangement for actuating an external event in a predictive manner according to the angular position of a rotating rotor having a plurality of spaced markings thereon, the arrangement comprising: first sensor means for generating a reference signal indicative of the position of the rotor; second sensor means for detecting the markings and generating a sensor signal in response thereto; indicator means, responsive to said sensor signal, for generating a present position signal indicative, at least in part, of the relative number of markings detected by said second sensor, said indicator means including: interpolation means, responsive to said sensor signals, for indicating of the relative angular position between sensor signals, and correction means, responsive to said interpolation means and to said sensor signals, for correcting said position signal by appropriately spurting and stalling the position signal; calculation means, responsive to said present position signal and said reference signal, for calculating a position signal indicative of a future predetermined position of the rotor; means, responsive to said present position signal and said calculated position signal, for actuating the external event when said present position signal indicates that the present position of the rotor is equal to the predetermined position of the rotor.

Claim 22

An arrangement for actuating an external event in a predictive manner according to the angular position of a rotating rotor having a plurality of spaced markings thereon, the arrangement comprising: first sensor means for generating a reference signal indicative of the position of the rotor; second sensor means for detecting the markings and generating a sensor signal in response thereto; indicator means, responsive to said sensor signal, for generating a present position signal indicative, at least in part, of the relative number of markings detected by said second sensor, said indicator means including: interpolation means, responsive to said sensor signals, for indicating of the relative angular position between sensor signals, and correction means, responsive to said interpolation means and to said sensor signals, for correcting said position signal by appropriately spurting and stalling the position signal; calculation means, responsive to said present position signal and said reference signal, for calculating a position signal indicative of a future predetermined position of the rotor; means, responsive to said present position signal and said calculated position signal, for actuating the external event when said present position signal indicates that the present position of the rotor is equal to the predetermined position of the rotor.