Interpolation method and shaft angle encoder

Details Interpolation method and shaft angle encoder Interpolation method and shaft angle encoder

H - Electricity

03

M

354/25, 324/75

H03M 1/30 (2006.01)

Patent

CA 1268256

ABSTRACT The present invention provides a method of interpolating between two signals comprising the conversion of each signal into digital form and use of the converted signals to address a memory device at each address of which is pre-stored the result of interpolation for a particular combination of values of the converted signals. One particular application of the invention resides in a shaft angle encoder comprising an encoder disc to be fixed to a shaft , sensor means regulated by the disc to produce two analogue output signals , analogue to digital conversion means which convert the said analogue output signals to digital words each having a plurality of bits,, a memory device in which the results of interpolation for particular combinations of values of the analogue signals are pre-stored at respective addresses, and memory addressing means into which the digital words are input so as to cause the corresponding pre-stored results to be output from the memory device

516652

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