Analog Signal Processing for Tachometer, Accelerometer, and Torque-Speed Curve Plotting of Motors by Use of Silicon Solar Cells

An optical tachometer is developed by the analog processing of the signals obtained from the silicon solar cell displacement sensors. Differentiating the speed signal, satisfactorily smooth acceleration signal is obtained by simple filtering. The torque-speed curve plotting for small motors by the application of this technique and the effects of the filtering on the plot are described.