Two words, underwater communication.The project goal was to build an acoustic modem for underwater communication to be used by our sponsor, SDSU Mechatronics. Mechatronics requires this system to enable their autonomous mother and daughter submarines to communicate with each other under the water during the AUVSI 2017 RoboSub competition. The two submarines enable the Mechatronics’ team to complete underwater obstacles in a short amount of time.
The project was divided into two sub groups, hardware and software. The software team was responsible to create a graphical user interface (GUI) and an interactive underwater simulation to generate data. The GUI must also apply error correcting schemes on the data received and provides live plotting.
The hardware team had to receive data from the software team and send it across a body of water (a fish tank or a swimming pool). The hardware team achieved this goal by generating frequencies using a DDS modulator, amplifying the signal and driving the transducers.
After the data is received by the transducer, it is passed through a bandpass filter and amplified through a variable gain amplifier. The signal is then enveloped by the precision envelope detector and converted to digital using an ADC. Once the microcontroller has sampled and processed the whole packet of data (96 bits) it is passed to the receive GUI. The team was able to successfully send, receive, and process packets of data within the semester time frame.
Hardware Project Manager
Power point (hardware)
Software Project Manager
Team Logo Design