Patent ID: 11486735

Abstract:
An electromagnetic inductive encoder that can suppress the effect of changes in magnetic flux received by the receiver section and maintain the accuracy of measurement results is provided. The electromagnetic inductive encoder 1 includes a scale 2 and a head 3 that is provided to face the scale 2 and moves relative to the scale 2. The head 3 includes a transmitter section 4 and a receiver section 5 with a plurality of receiving coils 500. The receiver section 5 has a first receiver section 51 with at least one receiving coil 500, a second receiver section 52 that is provided apart from the first receiver section 51 and has at least one receiving coil 500 different from the first receiver section 51, and connection wiring 53 that connects the first receiver section 51 and second receiver section 52. The first receiver section 51 and the second receiver section 52 are arranged linearly symmetrically with the axis L1 of the Y-direction, which is orthogonal to the X-direction (measurement direction) in the plane 30 where the receiving coils 500 are arranged, and are arranged in the same number.