Method and device for determining a difference value between two movements

An inductive sensor arrangement, comprising:

• at least two coupling devices;
• and
• at least one measured value acquisition device including:
• at least one circuit board having at least one exciter structure and at least two receiver structures, wherein the at least one exciter structure is coupled to at least one oscillator circuit which, during operation, couples a periodic change signal into the at least one exciter structure, wherein the at least two coupling devices are designed to influence inductive coupling between the at least one exciter structure and the at least two receiver structures,
• a computing device, and
• at least one evaluation and control unit designed to evaluate signals induced in the at least two receiver structures and to provide a first measurement signal which represents a first current mechanical movement acquired at a first periodicity, and a second measurement signal which represents a second current mechanical movement acquired at a second periodicity, to the computing device,
• wherein the measured value acquisition device includes a predetermined range of integer data and is configured to:
• multiply the first measurement signal by the second periodicity based on at least one integer algorithm, and in a manner allowing for arithmetical integer overflow to provide a resulting first multiplication result;
• multiply the second measurement signal by the first periodicity based on the at least one integer algorithm, and in a manner allowing for arithmetical integer overflow to provide a resulting second multiplication result;
• determine a difference value between the first multiplication result and the second multiplication result using the at least one integer algorithm, and using a third potentially occurring arithmetical integer overflow;
• and
• provide the determined difference value to a control unit.

A non-transitory computer-readable medium storing a computer program configured to be executed by a computing device to:

• obtain, from an inductive sensor arrangement, at least two different measurement signals including a first measurement signal which represents a first current mechanical movement acquired at a first periodicity, and a second measurement signal which represents a second current mechanical movement acquired at a second periodicity, wherein a first measurement range for the first measurement signal and a second measurement range for the second measurement signal are each scaled such that they each apply a full range of a provided integer data type having a predetermined number of bits;
• multiply the first measurement signal by the second periodicity based on at least one integer algorithm, and in a manner allowing for arithmetical integer overflow to provide a resulting first multiplication result;
• multiply the second measurement signal by the first periodicity based on the at least one integer algorithm, and in a manner allowing for arithmetical integer overflow to provide a resulting second multiplication result;
• determine a difference value between the first multiplication result and the second multiplication result using the at least one integer algorithm, and using a third potentially occurring arithmetical integer overflow;
• and
• provide the determined difference value to a control unit,
• wherein the inductive sensor arrangement has (i) at least two coupling devices, and (ii) at least one measured value acquisition device including at least one circuit board having at least one exciter structure and at least two receiver structures, wherein the at least one exciter structure is coupled to at least one oscillator circuit which, during operation, couples a periodic change signal into the at least one exciter structure, wherein the at least two coupling devices are designed to influence inductive coupling between the at least one exciter structure and the at least two receiver structures.