Trade Show Display to Demonstrate Flow and Pressure Controller Performance

Project number
16024
Organization
Alicat Scientific
Academic year
2016-2017
The goal of this project is to create a booth display piece that is the graphic part of a graphic audio equalizer. The display device uses a mass-flow controller to adjust the extension of a spring-loaded air cylinder and demonstrate pressure differences in physical movement.

Air flows from the air compressor into the device, which regulates the air pressure going into the air cylinder. As the device regulates the air pressure, the arm of the air cylinder rises and falls, creating a seismograph-like drawing system that uses a dry erase marker to continuously write on a rotating spool of whiteboard paper, which shows pressure transients and stable pressure levels.

This paper is rotated continuously around two spools powered by a direct-current motor controlled by an H-Bridge and software to adjust speed. The drawn image represents mechanically the electronic data represented in the software and produces an eye-catching trade show display.

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