Patent ID: 8207749
Filing Date: 2012-06-26
Classification: G01D

Abstract:
1. A method for inductively producing an electrical measuring signal in dependence on at least one of magnitudes to be measured which comprise the path or the position in space or at least one of material properties of a test object using at least two driver coils through which a current is caused to flow sequentially at a clock pulse rate of a clock pulse circuit, said current inducing a voltage which is dependent on the at least one magnitude to be measured in at least two sensor coils and which voltage is subdivided at the clock pulse rate of the clock pulse circuit into voltage signals that are associated with the driver coils, wherein the voltage signals obtained in this manner are evaluated so as to obtain the electrical measuring signal, wherein the at least two sensor coils are associated with the at least two driver coils, wherein either the sensor coils or the driver coils are operated in the same sense or connected up in the same sense, whereas the other respective coils, i.e. the driver coils or the sensor coils are operated in the mutually opposite sense or connected up in the mutually opposite sense, wherein the voltage signals of the sensor coils associated with the driver coils are sampled in certain time periods of the clock pulse signal for the purposes of obtaining the electrical measuring signal, and wherein the driver coils are operated in such a way that they have the same effect on the sensor coils.