초록 ▼

A variable reluctance sensor is shown for determining the speed or position of a moveable target object. The sensor has a magnet which is coupled to a pole piece. A wire coil is located annularly around the pole piece. The magnet generates flux in the coil which is changed by the movement of the tar

A variable reluctance sensor is shown for determining the speed or position of a moveable target object. The sensor has a magnet which is coupled to a pole piece. A wire coil is located annularly around the pole piece. The magnet generates flux in the coil which is changed by the movement of the target object. A second bucking magnet is annularly located around the coil and generates a flux field to reinforce the flux in the coil and to prevent flux from leaking from the wire coil and pole piece. In this manner, the voltage output from the coil is increased due to the decrease in flux leakage. A processor unit is coupled to the wire coil. The processor unit measures the reluctance generated in the coil from the movement of the target object.

대표청구항 ▼

1. A stationary variable reluctance sensor for determining the position of a moveable target object, the sensor comprising:a magnet; a pole piece coupled to the magnet; a wire coil located annularly around the pole piece; a second bucking, magnet annularly located around the coil which generates a f

1. A stationary variable reluctance sensor for determining the position of a moveable target object, the sensor comprising:a magnet; a pole piece coupled to the magnet; a wire coil located annularly around the pole piece; a second bucking, magnet annularly located around the coil which generates a flux field and wherein an air gap is created between the target object and the magnet, the pole piece, the wire coil and the second bucking magnet; a control unit coupled to the wire coil which measures the sinusoidal signal generated in the coil from the movement of the target object.