In any control system there is usually some element of movement. Not always, but mostly, especially in robotics. Where there is motion and a need to automate or control it there is an inherent need to measure and quantify it. This motion can be slow , fast, linear, rotational, constant speed, accelerating and even random.  What tools do we have by way of available sensors to quantify this motion and make the results available within a PC computer ?   This section will look at the different types of devices available, show how they operate and examine their suitability for particular applications. The menu on the left leads to the main types available...