The proposed solution addresses a current and pertinent problem and does so with a simple and effective solution. The students have also done a good cost comparison with existing solutions to demonstrate the value of their proposal.
We do not need wet wipes all the time. The students could consider adding an option to dispense the paper without the sanitizer sprayed on it. Conversely, one could also have the option of just getting the sanitizer without the paper. This will make the solution more versatile.
Contactless sanitizer sprays that we see in malls and offices these days provide similar benefits. However, the students have gone a step ahead by integrating a paper roll to the whole system. This seems like an entirely new approach.
Beyond Covid, similar systems can be implemented in hospitals and even at hawker centres in Singapore to assist our cleaning crews with wiping the tables and chairs.
It is commendable how this team made their idea into a good working solution using sensors, motor, relay circuit and pump spray. They demonstrated how their device worked to spray disinfectant solution to a paper roll. The motor turns to dispense the paper to be used. The team calibrated the timings for the solution to work properly. The team has designed holes to check on the paper and solution usage for replenish the supply. Also, instructions to are label easily on the use of their solution. Overall, it is designed and implemented with the user in the mind.
The paper needs to be teared from the roll. The team could consider a design for the paper to be cut with perforator edge. However, it should be too sharp to injure the users.
There are paper towel dispensers that easily work with off-the-shelf towels we cany buy from the supermarket. The paper quality is thicker and stronger for wiping the tables. Some of the solutions include a roller to guide the dispensing of the paper. The roller can also retract extract paper to reduce wastage.
The team could consider a way for a larger area of the paper to sprayed with the disinfectant solution so that the dispensed paper is wet enough to clean a larger surface area. The team can investigate how to maximise of the paper with the surface area to be wiped.