OPTO-Electronic Based Time Measurement Unit With Enhanced Sensitivity
Abstract: A low noise time easurement unit involving high slew rate Operational Amplifier (Op-Amp) and Microcontroller Unit (MCU) has been design and developed for velocity measurement of moving objects. Main purpose of
the work is to create a base method for measuring of a moving projectile with high accuracy when it passes through the two screens which are kept at known distance. Distance between the screens is known and Time of Flight (ToF) is determined by
the time interval of triggering signals of optical screens. By using time interval and covering distance we can obtain velocity
with the help of basic velocity-time relation. The system provides detection accuracy of the order of ±20mv and measures the ToF with resolution of 1µsec.