This current project of mine which I am documenting here was selected for the TI MCU Contest -2012 but did not make the final cut. What I am documenting by way of this post is for archival purpose and posterity.The project idea itself was half cooked and I aborted a similar project last year due to lack of motivation. You can see the remnants here.
Also you will notice that in this project I am using components made by Texas Instruments, the reason for that has been that TI has been gracious to supply me with their Launchpad development tool and samples of their instrumentation amplifier absolutely free.
Well, the net is abound with example for various methods to measure liquid level. However, most of the methods are based on methods that use conductors and a slightly conductive liquid to estimate the liquid level. As the post title suggest, what I attempted (and I guess that I was successful to a reasonable measure) was to design and develop a non contact liquid level gauge that monitors a tank for the fluid (water but can be any liquid) level.
The system hardware consists of two parts
(a) The Sensor Frontend.
(b) The Receiver Frontend.