A process for the interpolation of at least two position-dependent, periodic, analog signals phase-shifted with respect to one another

摘要

The invention relates to a method for interpolating, for the purpose of hodometry and/or goniometry, at least two position-dependent, periodic analog signals that are dephased relative each other and that are generated by scanning a measuring scale. According to the inventive method, the analog signals are converted to a digital data stream by means of a sigma-delta modulator, the data streams are interlinked with correctional factors and then with each other to generate a string of results and said string of results is used to generate new correctional values by means of a quality criterion to be fulfilled for interpolation and to also generate the output signals of interpolation. The values (d) of the string of results are accumulated over a defined time interval in order to generate the correctional values (k1, k2) and the output signals (w). The signal sequence generated by accumulation is used directly as the address sequence for generating the correctional values (k1, k2) and the output signal (b).