[ VOLUME 6 I ISSUE 2 I APRIL– JUNE 2019] E ISSN 2348 –1269, PRINT ISSN 2349-5138
440𝗑 IJRAR- International Journal of Research and Analytical Reviews Research Paper
WIRELESS SECURITY SYSTEM USING PIR SENSOR
Sombir1 & Manoj Kumar Pandey 2 & Neeraj Gupta 2
1M.Tech Student, 2Assistant Professor, Amity School of Engineering & Technology
Amity University Haryana, Gurugram, India
Received: March 01, 2019
Accepted: April 11, 2019
ABSTRACT: : In t his paper wireless security system is explained in which pyro electric infrared (PIR)
motion sensors are used. The main objective of this paper is to implement and improve the wireless security
system in economic rates so that, this can be used every where very easily. P IR sensor detects motion of
intruder when comes in it s range and alerts the person inside the building. The detection of motion of the
intruder is b ased on the change in t emperature due to the body temperature of intruder. The property of
pyro-electric material is to generate energy when temperature is changed. The side of the intruder is
detected by the particular sensor which is placed there. The circuit saves the power consumption and
memory storage.
Key Words: PIR (pyro-electric infrared) sensors, Vide o recording devices (Video camera), Transmitter,
Receiver.
I INTRODUCTION
In wireless security system the used circuit is based on pyro electric infrared (PIR) motion sensors [1]. To
capture the disturbance into the security region, many PIR sensors are used in each side of building. The
circuit detects motion of intruder from any side with the help of placed sensors and alerts the person inside
the building by turns ‘ON’ the alarm [2]. The detection of motion of the intruder is based on the change in
temperature which changes due to the body temperature of intruder. The detected signal is then amplified
and sent to the receiver circuit (Central Controller Unit) wirelessly. This circuit will work only when
intruder enters otherwise it remains OFF, therefore save the energy and records information when it is ON,
therefore more memory space is available [4].
In this system no wires are used and the placement of sensors is depends on the most desired
location from where every intruder can be easily detected. The range of covered area by the sensor is up to
10 meters.
It alerts the inside persons by blinking light and sound alarm immediately. This is generally most
applicable at remote buildings for security of wild animals etc.
The working principle of this system is based on temperature change with-in the capture area due to
intruder. This is low cost device and easy to installation.
The main aim of this device is to give security protection to buildings, houses and especially in
remote areas where wild animals or human beings cross the boundaries and try to enter houses and
buildings, the device alerts the owner by giving audio/visual hints or alarms.
II BACKGROUND STUDY
Transmitter and receiver are present in normal security system. A transmitter is used to send IR laser and a
receiver is used to receive the signal. The IR radiation is cut when any intruder enters and indication
received but this system has some major disadvantage of poor line of sight and limitation in range which is
eliminated by PIR sensors [6]. In this circuit the radiation of IR is not required because here the energy is
emitted, above absolute zero temp., from the intruder. The temperature of wall is different from the
temperature of human pass across PIR sensor. Therefore it is called passive as it accepts the signal
passively. An idea was invented to secure houses or buildings with the help of electronics devices. Because
this is very cheap in cost and also secure, because anyone can alert inside the house without going outside
and can alert another neighbors giving loud voice.Two systems are used for security purpose i.e. video
cameras in which human face can be identified or video recordings are possible and the PIR motion sensors
which are used as it alerts immediately.The cameras are connected with cable/wires whereas PIR sensors
are wirelessly works. It senses the change in temperature by cause of intruder. The passive word is used for
sensors because of generation of electrical signals when temperature changes on pyro-electrical material.
