Procedure and apparatus for sectional magnetic coding of an axis and for measurement of angle of rotation, speed of rotation and torque

摘要

Magnetically encoded shafts for use in detecting forces exerted on the shaft (271) during operation. magnetically encoded regions (272) arranged in tracks (272) or bands, encircle the shaft (271) and are formed within or affixed to the shaft (271). The magnetically encoded regions (272) define force-sensitive regions (272) therebetween. Magnetic fields surround the force-sensitive regions (272) and are altered by force vectors passing through the force sensitive region (509). These magnetic fields are sensed by magnetic field sensors (352) to determine various shaft (271) parameters including, for example: shaft (271) rotational speed, shaft (271) rotational position, and forces exerted on the shaft (271), e.g., torque, bending forces, stress forces and strain forces. To provide continuous detection of shaft (271) operational parameters and forces, dead zones between magnetically encoded regions (272) are aligned with force sensitive regions (509) associated with magnetically encoded regions (272) in other bands.