Patent ID: 11971252
Assignee: nan
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An inductive position measuring sensor, comprising a fixed ruler and a sliding ruler relatively movable along a direction of a measuring axis;
a series of coupling coils arranged on the fixed ruler along a measuring direction;
two sets of driving coils are disposed on the sliding ruler, and induction coils arranged in a staggered mode are also disposed on the sliding ruler;
wherein, excitation signals are generated by the two sets of driving coils, and received by the induction coils of the sliding ruler through introduction with the coupling coils on the fixed ruler, for measuring the relative movement of the fixed ruler and the sliding ruler;
the two sets of driving coils on the sliding ruler generate the excitation signals in turn, each set of driving coils comprises two excitation coils, all of the four excitation coils are of the same size and shape, and the centers of the four excitation coils are respectively arranged on four corners of the rectangle which are symmetrically located about the measuring axis;
two or more sets of induction coils arranged on the sliding ruler in a staggered manner, the induction coil is composed of a plurality of measurement coils arranged at interval in a winding direction in series, arranged along the measuring axis, and respectively forming two measurement areas in the middle of the two excitation coils, the measuring coils at the same position in the two measurement areas are connected in series, and the measuring coils at the same position in the two measurement areas are at the same distance from the exciting coils thereto;
wherein, the coupling coils on the fixed ruler are comprised of four conductive loops having different shapes and different winding directions and arranged crosswise, and the conductive loop has an interval period of 2T; when one set of driving coils generates excitation signals, only two of the four conductive loops in the same interval period are coupled.