Project

Fire Alarm

Fires if detected early can cause less damage. Different types of detectors like Ionization detector, Heat detector, and Beam detector, Rate of rise detector, Photo electric smoke detector, Manual call points, and Response indicators are connected to an intelligent fire alarm panel. This alarm panel will immediately produce a sound from sounder. An auto-dialer can also be connected to provide communication with the fire department, owners, friends and relatives. The main parts of burglar alarm are smoke detector, Alarm panel convectional, Alarm panel addressable, Manual call point, Response indicator, Hooter, and control module etc. The accessories needed for it are CCTV cable, co-axial cable, 2 core power supply cable, Cat5 cable, BNC connector, RC connector, 5 pin DIN connector, Power supplies etc.    

The Science behind It…

The sensor used in fire alarm is pyroelectric. Pyroelectric means made from a ceramic Material like tourmaline. When it is heated, a voltage generates across it. This system is designed so that the sensor will respond to a temperature change. But its sensor will not respond to weather changes. Alarm triggering is very common. But because of excess cost and repairing charge most of the people go with cameras. By weather problems, the alarm may get weak .So the modern techniques which will give sms, live videos etc are being used in this field also. From the study we conducted, we came to an information that people has much interest towards the above listed things. So companies are also marketing these interests with the help of 2g, 3g facilities…..     

Amazing fact

Now days, eye also play a major role in the security instrument field. There is a part in human eye with ash colour or blue colour called iris. Iris of each person is entirely different. This is what enables the technology to recognize person.  During  puberty  itself,  aspecial  type  of  sigh  will be  formed  in the  pupil.  This will not change till death. It was in 1992, that this technology became globally popular. Iris pattern scanner which consists of digital camera and computer is being used now.

How a Wireless System Works

A conventional wired microphone converts sound waves into an electrical audio signal that travels to the sound system through a cable. A wireless microphone system goes one step further, and converts the audio signal created by the microphone to a radio signal which is sent to the sound system through the air by a transmitter. The radio signal is similar to those used by television and FM radio stations. The receiver tuned to the same frequency as the transmitter picks up the radio signal, converts it back into an audio signal, and feeds it to the sound system through a short cable. The receiver is usually located near the rest of the sound system.

The Components

A wireless system consists of three main components: an input device, a transmitter, and a receiver. The input device provides the audio signal that will be sent out by the transmitter. It may be a microphone, such as a handheld vocalist's model, or a lavaliere "tie-clip" type. With wireless systems designed for use with electric guitars, the guitar   itself is the input device.