Title of activity: Build the block diagram for this project.
Objective : To understand the flow in this project.
To understand the concepts used in this project.
Content/procedure :
For this week, I had started to make a block diagram for my project. By using material from my research, I began to see How can the processes and concepts that have been used in my project. Before designing the block diagram, I have consulted with my advisor to ask for suggestions, and opinions at last week. A lot of useful information that I can be in making a block diagram for my project.
Result and analysis :
Block Diagram for this Project :-
SENSOR
For monitoring unit
this project uses the sensor Light Dependant Resistor (LDR). The Light
Dependant Resistor (LDR) will be use as a sensor to detect the intensity of
light. The Light Dependant Resistor (LDR) will send the data to the National
Instrument (NI) LabVIEW. The Light Dependant Resistor (LDR) circuit is taken
from internet. The Light Dependant Resistor (LDR) will be use because this
component is very cheap compare to photo sensor. Next, when the Light Dependant
Resistor (LDR) circuit is complete and can be used, we will construct the
stepper motor circuit. The stepper motor will use IC ULN2003AG to drive a
current to stepper motor. The high current is needed to drive the stepper
motor. Lastly, we will troubleshoot all the part of circuit to make sure no
problem will occur in the future.
Controller
For this project, the
programming that use is National Instrument (NI) LabVIEW software. LabVIEW
is a graphical programming environment used by millions of engineers and
scientists to develop sophisticated measurement, test, and control systems
using intuitive graphical icons and wires that resemble a flowchart. It offers
unrivaled integration with thousands of hardware devices and provides hundreds
of built-in libraries for advanced analysis and data visualization – all for
creating virtual instrumentation. The LabVIEW platform is scalable across
multiple targets and OSs, and, since its introduction in 1986, it has become an
industry leader. The software used to control and display the output.
This will be connected with the DAQ card to transfer the data to the Lab View.
The software is used to show data from the solar panel and to switch on the
solar circuit. It also uses to control the motor movement.
Actuator
For this project the
emotion controller that use is stepper motor. Stepper motors are special motors
that are used when motion and position have to be precisely controlled. The
stepper motor is closely related in design to three-phase AC synchronous motors
where an internal rotor containing permanent magnets or a large iron core with
salient poles is controlled by a set of external magnets that are switched
electronically. A stepper motor may also be thought of as a cross between a DC
electric motor and a solenoid. As each coil is energized in turn, the rotor aligns
itself with the magnetic field produced by the energized field winding. Unlike
a synchronous motor, in its application, the motor may not rotate continuously;
instead, it "steps" from one position to the next as field windings
are energized and reenergized in sequence. Depending on the sequence, the rotor
may turn forwards or backwards. The stepper motor will be controlled by National
Instrument (NI) LabVIEW after get signal from Light Dependant Resistor (LDR).
Panel For this project, the panel use is solar panel. Solar panels collect solar radiation from the sun and actively convert that energy to electricity. Solar panels are comprised of several individual solar cells. These solar cells function similarly to large semiconductors and utilize a large-area p-n junction diode. When the solar cells are exposed to sunlight, the p-n junction diodes convert the energy from sunlight into usable electrical energy. The energy generated from photons striking the surface of the solar panel allows electrons to be knocked out of their orbits and released, and electric fields in the solar cells pull these free electrons in a directional current, from which metal contacts in the solar cell can generate electricity. The more solar cells in a solar panel and the higher the quality of the solar cells, the more total electrical output the solar panel can produce. The conversion of sunlight to usable electrical energy has been dubbed the Photovoltaic Effect. The photovoltaic effect arises from the properties of the p-n junction diode as such there are no moving parts in a solar panel. The solar panel will be control the movement by stepper motor to get sun ray.
Conclusion :
From this week, I can conclude that our objective successful. From the block diagram, I can know how the flow of my project and it can help me to better understand the concepts used in this project. For next week I will prepare a proposal for this project to be delivered to my advisor.
Title : Labview Based Solar Tracking System with Stepped Motor
Universiti Kuala Lumpur (BMI) ID No : 51210210236 Adviosor : Nulida Bt Abd Aziz Email : mohdzaie@gmail.com Phone : +6013 356 2416 YM : pok_ukk@yahoo.com Find me at FB : Mohd Auzaie |
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