The cylinder operates in a dirty environment which makes external linkages undesirable (though our competitors do that now). The interior remains relatively clean and I would not anticipate the interior reflectivity to change much over time (the angularity may pose a seperate problem...
Thank you for your reply. More on the application: we are trying to control the pressure inside a cylindrical pressure vessel whose ends are moving (both axially and angularly - to accomodate this movement a flexible seal is used). When the ends come closer together than a...
We've investigated ultrasonic ranging sensors to measure distances between 2" and 24" but they have some draw backs in our application. We're now looking at infrared (I believe many video cameras use this technique) for ranging but I've found very little about it. Does anyone have an...
