Abstract
A 4 mm multiplied by 6 mm multiplied by 3 mm electrooptical force-sensing transducer was developed from a metal U-shaped spring. Force compresses the open end of the spring so that it decreases light passing from a light-emitting diode to a light-sensing solar cell. The parts cost 2. The operating range is from 0 to 50 N, but can be changed by using different spring metals and dimensions. Nonlinearity is about plus or minus 7%. Hysteresis is less than 3%. Random error is about 6% peak-to-peak. Temperature-related zero drift is less than 1%/ degree C uncompensated and much lower with compensation. When embedded in a rubber insole, this thin transducer is used to measure force on the sole of the foot during normal human gait.
| Original language | British English |
|---|---|
| Pages | 1092-1093 |
| Number of pages | 2 |
| State | Published - 1987 |