This week I mainly worked on the design for our voice recognition module. I compared a few different options that I found last week, and selected the most feasible one that we could use based on our current design. For example, when selecting the microphone, I realized that the 4 microphone array would have a more precise voice recognition function than the 2 microphone array, and it can also know the direction of the sound source. For the voice recognition engine, I focused on offline modules, and compared the recognition accuracy as well as the feasibility of using it such as whether it’s open source or not. What’s more, the delivery time for the products is also considered. Therefore, with all these factors taken into account, my teammates and I finally decided to use the WonderEcho AI Voice Recognition Module, where it has a builtin neural network processor for offline voice recognition, a noise reducing microphone, and runs on the CI1302 voice chip model. I also worked on the design presentation, where I mainly focused on the solution approach, implementation plan, and quantitative design requirements.
For this week, the progress aligns with our current schedule, and the required components are all settled and ordered from the inventory. Then, after the components arrive, we will work on testing the components by parts, and make sure the motor for the trash bin works fine.