Rotational movement transducer output modifying circuit

Details Rotational movement transducer output modifying circuit Rotational movement transducer output modifying circuit

G - Physics

01

P

340/148.7

G01P 3/48 (2006.01) G01P 3/489 (2006.01) G06F 7/68 (2006.01)

Patent

CA 1040725

ABSTRACT Apparatus for measuring the angular movement of a body comprises a transducer for providing a signal the frequency fi of which is dependent on the angular velocity of the body and a reference frequency source providing a reference fr. An (n + m) stage binary counter is provided for counting the number of reference pulses in time period Image and an (n + m) stage binary store receives a count from said counter when the latter receives a signal from the transducer. The apparatus also includes an n-stage binary rate multiplier having a first input for receiving the n least significant figures of the store, and a second input for receiving an output signal from the apparatus, the rate multiplier being arranged to generate, during the period in which the rate multiplier receives 2n binary pulses at said second input, a number of output pulses which is equal to the number of pulses applied to said first input. Dividing means receives first input signals equal to the m most significant figures of the store in the absence of an output signal from said rate multiplier and receives second input signals from said reference source, the dividing means producing an output signal which forms said output signal of the apparatus and which is determined by dividing the frequency reference signal by the signal applied to said first input of the dividing means. Moreover, means is provided for modifying the output signal from the dividing means when an output signal is obtained from the rate multiplier, whereby 2n output pulses are received between successive input pulses from the transducer, the maximum value of fr/fi being <2n+m, and the minimum value of fr/fi being>2n.

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