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Distance Proximity Sensor
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CHAPTER ONE
INTRODUCTION
1.1 BACKGROUND TO THE STUDY
In
our society today writing a project is all about applying the
theories learnt over the year to produce design and construct and
operating system which will be capable of performing a known task.
It
is from this point of view that we decided to write, design and
construct this particular project which has the titles construction and
design of distance proximity sensor using LDR and LEDs used in
controlling the current flow in the circuit system.
Sensors are
devices used to provide information on the presence or absence of an
object. It measures the closeness of body to obstacles (both animate and
inanimate) that may not be visible to the driver or that the driver may
yet not have realized (NEMA, 2013).
Previous researcher has
discussed the proximity issue in construction including injury and
fatality statistics of collisions between construction equipment and
workers. Because construction projects often involve many repetitive
tasks, construction workers can experience decreased awareness and loss
of focus (Pratt et al. 2001, Teizer et al. 2010). Construction equipment
operator visibility, specifically operator blind spots, can be a major
factor in contact collisions between construction equipment and ground
workers (Fullerton et al. 2009). A real-time proximity detection and
warning system is needed on construction jobsites to warn equipment
operators of hazardous proximity situations.
1.2 STATEMENT OF THE PROBLEMS
The problem statements regarding this project are:
Ø
The usage sensors of are on the rise from time to time but there are no
cheaper design that is constructed to detect object (animate and
inanimate at closed proximity.
Ø The most common type of proximity
sensor is the infrared, ultrasonic types and when they are faulty
component are rare to see in the market.
Ø An alternate method of
designing distance proximity sensors needs to be developed to curb the
scarcity of electronics for measuring distance.
Ø Scientific
laboratory experiment are carried out without safety awareness, safety
consciousness has to be improved in schools laboratories.
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