DESIGN OF POWER MANAGEMENT SUBSYSTEM ON WATER QUALITY MONITORING SYSTEM FOR FLOATING NET CAGES
The water quality monitoring system in the floating net cage is located in a reservoir, so it cannot receive power directly from the electric grid. Therefore, a power management subsystem is needed to provide resources and manage all system power requirements efficiently. The resource used is...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/56527 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The water quality monitoring system in the floating net cage is located in a
reservoir, so it cannot receive power directly from the electric grid. Therefore, a
power management subsystem is needed to provide resources and manage all
system power requirements efficiently. The resource used is an alternative energy
source (solar energy). The solar cell will detect the sunlight and convert it into
electricity and then charge the battery. The battery will supply power to meet the
needs of the whole system. This system does not have to be active all the time
because the water conditions in the reservoir tend not to fluctuate, so the system
sets to be active only every 30 minutes. This period will be set using an external
timer circuit using the astable mode IC555 which has an off-time of 28 minutes and
an on-time of 2 minutes to retrieve water quality information. This timer is also
used to optimize and save system power consumption significantly compared to the
sleep mode on the microcontroller. The main components of this subsystem are
polycrystalline solar panels (chosen because have more resistant to weather
changes) 6V 6W, and Lithium-Ion rechargeable batteries (chosen because having
a larger electrical capacity, easier to obtain and maintain) installed in two series
and two parallel. When combined with the overall system, this subsystem
functionality can work properly. The system can remain active when it does not
receive sunlight, battery charging can occur using a solar panel or micro USB for
extreme conditions, the on/off timer period is appropriate, and battery durability
(in testing, the system lasted three days in a row). From the results, this subsystem
has also answered several related specifications, i.e., having a power consumption
of 1909.63 mW, a working voltage of 5V, a battery capacity of 16000 mAh, a data
transmission period of 30 minutes ± 2 minutes, and charging using energy
harvesting |
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