Multipurpose High Resolution One-Track Tachometer
Original Publication Date: 1984-Nov-01
Included in the Prior Art Database: 2005-Feb-05
This article describes a circuit and means for generating a synchronization pulse and unique timing signals with a one-track digital tachometer providing evenly spaced signals. The circuit also provides high tachometer resolution. The figure shows a block diagram of the circuit. A single track tachometer 10 is attached to the motor 11 (or any other rotating device whose speed and/or position is to be monitored). The pulses on this digital tachometer are uniformly spaced with the exception that a modified pulse is provided once per revolution for synchronization. The modified pulse can be an additional pulse or a missing pulse that can be detected because of the abrupt change in relative pulse timing.