Friday, July 8, 2011
Day 2 - The Transducer
The beginning of my day started with taking simple pictures of the paper samples to show the texture of the samples before we scan them. The next step was setting up the mount to hold the paper in place as the transducer ran across the top of it. Then we used a substance that we knew was already reflective to calibrate the transducer. just like any other lens the transducer has a focal length, but this one is unknown. Using the oscilloscope we move the transducer until we have maximized the reflection off of the substance. Then we worked on orienting the transducer perfectly vertical, this is done by looking at the echo and trying to make it symmetrical Think of a cosine wave with a slightly higher peak at the origin, that is our goal, and it takes much longer than you would think.