Detecting Tiny Gear Teeth скачать в хорошем качестве

Detecting Tiny Gear Teeth

We demonstrate detecting less than 1 millimeter pitch gear teeth using NVE's unique "GT" GMR gear-tooth sensor. Specifically, we use an ABL006 Gear-Tooth sensor biased by an inexpensive ferrite magnet. A high-speed motor spins a fine-tooth gear, and we can vary the speed. A digital meter displays the speed measured by the sensor; and a microcontroller controls it all. The sensor provides accurate speed measurement from DC to 10000 RPM. This demands a high-speed, sensitive sensor, since the gear has tiny teeth--the gear module is about a quarter-millimeter; the pitch is less than a millimeter; and the depth barely half a millimeter. We also show how the sensor works, and summarize sensor options.