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Construction And Design Of Police Siren
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Pneumatic Siren consists of a rotating disk with holes in it such that
the material between the holes interrupts a flow of air from fixed holes
on the outside of the unit. As the holes in the rotating disk
alternately prevent and allow air to flow it results on alternating
compressed and rarefied air pressure i.e. sound. It consumes large
amount of energy.
Electronic Siren incorporate circuits such as
oscillators, modulators and amplifiers it synthesize a selected tone
which is played through external speakers. It is not unusual especially
in the case of modern engines, to see an emergency vehicle equipped with
both types of siren.
1.2 PROJECT OBJECTIVE
The main
objective of this project is to implement Electronic Siren in both the
software and hardware version. We are going to learn the PCB designing,
Proteus software handling in an effective manner. At the end of this
project student will be able to learn all these things. Electronic Siren
is basically high-performance sound signal electronic amplifiers. These
siren works with substantially higher outputs and specific demand are
placed on them in terms of desired extreme reliability and different
methods of control on them. Moreover control infrastructure must also be
reliable and usually two independent control channels are required.
The
loudspeakers for these amplifiers are placed in specially- designed
sound battles and they play the signals stored in the siren’s digital
memory or signals fed to the siren from external sources.
1.3 FUTURE SCOPE
It
is possible to add an external signal source with these devices.
Moreover it provides enhanced automatic testing. It is employed at user
friendly level easily. In industry it will be a great advantage to the
people.
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