The target for this prototype was divided into two main stages :
Stage 1 (Suction Mechanism) : Overcoming the shortcomings mentioned at the end of the description for Prototype 1 in order to achieve better suction efficiency along with allotting a space for the storage of collected leaves.
Stage 2 (Chassis and Circuits) : Once the suction mechanism was created, the next aim was to design and frame a chassis that carries this suction mechanism. In addition to that, we needed to generate a mechanism to control the vacuum status of this suction mechanism as well as the direction of the wheels attached to the chassis.
CAD Drawing for Prototype -2
Link for CAD design (Fusion 360 Software): https://ahduni31.autodesk360.com/g/shares/SH56a43QTfd62c1cd968e3c72a462589f5a5
Orthographic Projection
At the end of this prototype, we were able to achieve higher suction efficiency than Prototype-1 with optimized air flow for producing vacuum, reduced clogging after installing mesh grid and storage for collected dry leaves. From the calculations the efficiency of the suction mechanism is 20.43 %.
At the end of this phase, we were able to achieve smooth transmission of data from the nRF transceiver module. The respective received data triggered the correct set of motion commands for the prototype. Hence, a successful connection between these systems after each command execution provoked the motion of the prototype and On/Off state of vacuum.