Design A Controller To Control Fluorescent Lighting And Other Electrical Equipment In A Classroom Using Programmable Logic Controllers
Programmable Logic Controllers (PLC) is widely used in almost any industrial applications in our modern world. In this project, the PLC is used to control dimming and ON/OFF control of fluorescent lights as well as other electrical equipments in a typical classroom. Sensors and switches are us...
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| Main Author: | |
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| Format: | Monograph |
| Language: | English |
| Published: |
Universiti Sains Malaysia
2006
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| Subjects: | |
| Online Access: | http://eprints.usm.my/58606/1/Design%20A%20Controller%20To%20Control%20Fluorescent%20Lighting%20And%20Other%20Electrical%20Equipment%20In%20A%20Classroom%20Using%20Programmable%20Logic%20Controllers_Ang%20Shor%20Lin%20Sherine.pdf http://eprints.usm.my/58606/ |
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| Summary: | Programmable Logic Controllers (PLC) is widely used in almost any industrial
applications in our modern world. In this project, the PLC is used to control dimming and
ON/OFF control of fluorescent lights as well as other electrical equipments in a typical
classroom. Sensors and switches are used as inputs to the PLC to determine the current
condition is the classroom. This project offers great energy management control avoiding
energy wastage by human carelessness as well as unnecessary over energy usage.
Dimming control of fluorescent lights would not only allow energy saving but would also
pro-long the life span of the fluorescent lights as well as ensuring a sufficient and
comfortable level of light intensity in the classroom for the students. A small classroom
model is considered in this project for fluorescent lights control. A Passive Infrared
Remote (PIR) Motion Sensor is used as an input sensor to detect the presence or absence
of people in the classroom; manual switches are also included in this project for special
cases where the motion sensor malfunctions. Apart from that, light intensity sensors are
also implemented using light dependent resistors (LDR) to obtain the luminance level of
the environment as well as allowing dimming control of the fluorescent lights in the
classroom. Besides that, a light sensor is also implemented to detect the projector current
status to allow proper lighting control. All these input sensors and switches will serve as
input signals to the PLC making proper lighting control possible. Proper lighting controls
will be sent through the PLC I/O ports to the hardware devices. For dimming control of
fluorescent lamps, the normal ballast must be replaced with dimming ballast. Although
dimming ballasts involves rather new technology, tedious and complex design procedures
as well as in depth knowledge in ballast design, by using the Ballast Designer software
(BDA) its steps are significantly reduced and simplified. The ballast designed in this
project is done using the dimming ballast IC IR21592 from International Rectifier. This
ballast is designed to suite a single T8 36W fluorescent lamp from a 240Vac input
voltage source. This project shows how proper fluorescent lighting control and energy
management in a classroom can be derived through a proper interface with minimum
software and hardware connections. |
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