Strain-Gauged Shaft Tape-Tension Transducer
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-05
Modern tape drive technology has created the need for a non-pneumatic tape-tension transducer. The design presented here represents a simple, low cost alternative to the current tension transducer art. The tension transducer consists of a roller which rotates on a cantilevered shaft which has strain gauges attached to opposite sides near the shaft's point of fixation (Fig. 1). When tension is applied to the tape, a bending moment is generated in the shaft. The resulting strain in the outer fibers of the shaft is linearly proportional to the magnitude of the tape tension. The strain gauges are oriented on the shaft such that one is loaded in pure tension and the other in pure compression.