Contactless inductive rotation angle measurement appts. eg for throttle flap of IC engine - has two windings running parallel to surface of former, and changing winding direction at diametrically opposite hooks.

摘要

The body of the coil former (11) carries two diametrically opposed windings (13,14) of wire parallel to its surface which is faced in its entirety by an electrically conductive or ferromagnetic sleeve segment (22), covering about half of the circumference and coupled by a disc or bar (23) to the shaft (24) whose angular position is to be measured. In the initial position both windings are covered equally by the segment so that measurements can be made on rotation in either direction inductively or by means of eddy currents. ADVANTAGE - Almost entire length of measuring coil is usable for variation of its inductance, giving high sensitivity with temp. compensation by its mirror-image arrangement w.r.t. median plane.