초록 ▼

A dual speed sensor pickup assembly (140) for sensing the rotational velocity of two independently rotatable, closely axially spaced exciter rotors (116 and 118) is provided. The pickup assembly includes two speed sensor assemblies (136 and 138) each including a pole piece (152,160) having a longitu

A dual speed sensor pickup assembly (140) for sensing the rotational velocity of two independently rotatable, closely axially spaced exciter rotors (116 and 118) is provided. The pickup assembly includes two speed sensor assemblies (136 and 138) each including a pole piece (152,160) having a longitudinal axis (152a,160a) with the longitudinal axes skewed relative to one another but radial relative to the common axes of rotation (24) of the exciter rotors. Each speed sensor includes a permanent magnet (154,162) disposed between an end of the pole piece (152,160) and having a face divided into first and second surfaces (154a,154b and 162a,162b) by a slot (154c,162c) therein. In one embodiment a primary coil (156,164) and a secondary or anti-cross talk coil (158,166) surrounds the pole piece of each sensor (136,138), and each secondary coil is conductively connected to the primary coil of the other sensor. In another embodiment, an electronic circuit (176) is provided for producing anti-cross talk signals which are added to the speed sensor signals.

대표청구항 ▼

A speed sensor pickup assembly for sensing the rotational velocity of an exciter rotor mounted for rotation about an axis and having a plurality of circumferentially spaced apart exciter surfaces; the pickup assembly comprising means for mounting the pickup assembly in a predetermined position relat

A speed sensor pickup assembly for sensing the rotational velocity of an exciter rotor mounted for rotation about an axis and having a plurality of circumferentially spaced apart exciter surfaces; the pickup assembly comprising means for mounting the pickup assembly in a predetermined position relative to the exciter surfaces, a ferromagnetic pole piece, a conductive coil surrounding the pole piece, a permanent magnet affixed to the pole piece and having a face positioned for close traversal by the exciter surfaces; the pickup assembly characterized by: the face of the permanent magnet having a slot therein dividing the face into first and second surfaces positioned for substantially simultaneous traversal by adjacent exciter surfaces of the exciter rotor.