FOURTH STAGE: week four
The
Automatic Trash Bin
Year Two Group Project, University of
Liverpool, Electrical and Electronics Engineering Department.
The developments of this project were supervised by Dr.
James Bradley
The Group members are
Haoran Cheng, Xuhui Gong, Shekhah Mobarak,
A-ro Han
Week Four; 21 Feb 2020
Fourth Stage
Typically, the week started with a meeting held by the team
to discuss what we have to achieve by this week’s laboratory session, in
addition the group had briefly discussed the sustainability report the work was
distributed amongst the team. The team agreed that the following tasks are to
be completed during this week’s lab session; the software team has to continue their
work and keep developing the user interface as well as making further minor
adjustments to the speed of the motor. A new cover has to be created which will
be suitable for the model and will consider the height of the objects. The
height of the divider has to be adjusted, meaning more height to the divider is
to be added. In addition, the circuit has to be finalized and soldered on a
circuit board. A speaker is to be connected to the Automatic trash bin since
the system will have to indicate what type of trash is thrown into the trash
bin.
Following the brief meeting held by the team members, the
group met with the supervisor for the weekly meeting to discuss the project
previous week laboratory progress (week three), as well as complications that
they had faced for the week and how they intend to resolve these issues.
The progress of the previous week’s laboratory session was;
- Several photographs were taken of cans, bottles, papers, etc in
different angles to be able to increase the accuracy of the algorithm.
- The hardware team began to construct the dividers but have not finalized
it yet since it was found by the end of the laboratory session that more length
has to be added to the dividers to ensure that the objects will fall into the
correct category.
- The software team began adjusting the speed of the motor however
more tests are to be conducted to ensure that the printed components will not
wear out.
-
The concerns of the week which are to be resolved during the
fourth week laboratory session;
- The components that we initially printed were not strong enough
therefore they have to be printed again the past weeks components were already
modified however they need further modification.
- The hardware team was not able to complete the dividers section
of the structure, from the previous laboratory session the divider has to be
taller to stop objects from falling into the incorrect category.
- The software team tested the interface however they were not
able to test the interface with the system.
- The circuit created on the breadboard is too heavy therefore the
hardware team has to design a circuit on a Veroboard and solder the circuit.
The tasks assigned for this week were:
- Create a cover for the bin and test it with the servo motor.
- Construct a divider that is tall enough to decrease the probability
of objects from falling into the incorrect category.
- Solder the designed circuit.
- Connect all of the software and hardware together.
Figure Thirty-Four Supervisor
meeting four log
Laboratory session
During this week’s laboratory session, the
group was divided into hardware and software group, to be able to achieve the
several tasks assigned by the end of the laboratory session.
For the hardware team;
The circuit that was designed on the SK10 board
is now constructed on a Veroboard so that it is compatible with the structure
of the automatic trash bin and was successfully soldered by using a soldering
iron as shown in figure 35, the system was tested after soldering the circuit
functioned as it was operating before.
Figure Thirty-Five: Soldering iron
Figure Thirty-Six: Part of the soldering stage
Figure Thirty-Seven: Part of the soldering
stage side view
In addition, the group decided to leave the
cover as it is shown in week three figure 26, it was concluded that this part would
be considered as future work and for this project we would only demonstrate the
way in which the cover opens and responds when sensing motion, also the cover
is to stay open throughout the operation.
The hardware team also added more length to the
dividers; therefore, the objects now fall into the exact category which it is
meant to fall into and does not enter the incorrect category.
More 3D components were printed for this
laboratory session to replace the previous components, the micro servo motors
were all fixed into the MDF sheets at this point.
Figures Thirty-Eight to Forty-One below show the
printed parts.
Figure Thirty-Eight: Micro servo motor attached
to 3D component
Figure Thirty-Nine: Micro servo motor attached
to 3D component
Figure Forty: 3D component to attach to bearing
Figure Forty-One: 3D component to attach to
bearing upper view
Figure Forty-Two: Micro-servo motor fixed onto
the MDF sheet
As for the software team;
The team started their further development to
the user interface by the end of the laboratory session the user interface was functioning
properly by the end of the lab.
Figure Forty-Three: User interface screen
Figure Forty-Four: Software team developing the
user interface
By the end of the laboratory session the
software and hardware teams gathered all of their work and finalized the
automatic trash bin structure.
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