Motion Detector

By Darma Sentosa (22/6/2011)

Motion detector is a electronic device contain physical mechanism and sensor that use for catch or quantifies the motion image and can connected to other device that alert the user of the presence of a moving object within the field of view. Motion detector feature to reduce the burden of data storage. How it works is the motion detector detects a change pixel. If there is a movement, then the CCTV cameras consider changing its pixel values and finally record the changes. Motion detectors can also be used to provide a signal to the alarm to work so that we can monitor if there are any movements that we do not want. They form an integrated and comprehensive security system in the house or buildings.

An electronic motion detector contains a motion sensor that transforms the detection of motion into an electric signal. This can be achieved by measuring optical or acoustical changes in the field of view. Most motion detectors can detect up to 15–25 meters or 50–80 feet. A motion detector may be connected to a burglar alarm that is used to alert the home owner or security service after it detects motion. Such a detector may also trigger a recording device like red light camera and outdoor lighting.

An occupancy sensor is a motion detector that is integrated with a timing device. It senses when motion has stopped for a specified time period in order to trigger a light extinguishing signal. These devices prevent illumination of unoccupied spaces like public toilets. They are widely used for security purposes.

Placement of the sensors can be strategically mounted so as to lessen the chance of pets activating alarms. As interior motion detectors do not ‘see’ through windows or walls, motion-sensitive outdoor lighting is often recommended to enhance comprehensive efforts to protect your property. False alarms are those usually caused by technical errors such as electrical and mechanical failures. Nuisance alarms are system activations not commonly caused by attackers or intruders but rather from wind blown debris, animals, insects and foliage.

Smoke Detector

By Darma Sentosa (20/6/2011)

Smoke detectors detect smoke particles seen and unseen from the burning. Two types of smoke detectors commonly used are photoelectric type and ionization type. Description of each smoke detector as follows:

1. Photoelectric smoke detector

     In the photoelectric smoke detection system there are two beams, it is light source and light sensors that are designed so that both beams are not in touch. Smoke particles that enter the light source will be dissipated toward the light sensor and activate the fire alarm system.

2. Ionization smoke detector

     Ionization detectors have radioactive sources in them that give the air in the electric charge in a small space so that it can conduct electricity through the small space. When smoke enters the detector, the radiation will be blocked and is unable to give an electrical charge on the air and unable to deliver electricity through the space in it, when no electrical conductivity then the fire alarm will sound

Hydrant System

By Darma Sentosa (19/6/2011) 

Hydrant is the equipment needed by the firefighters, especially in residential facilities or buildings other than mild extinguishers, hoses and fire-resistant clothing. House or buildings that have a fire extinguisher system installation get a rebate of insurance premiums due to the installation of fire can reduce the damage to property or goods insured.

At first, the fire extinguishing system is done by calling the firefighters and then the officer will explore and drill for water. Water from the drilling pipe will meet the well-made temporary, then the distribution of water using a bucket or using a hand pump manually. When the fire can be extinguished, then the well will be closed / capped with a stopper, generally by using a block of wood / redwood later called fireplug. Locations where fireplug will be marked for use at another time when there is a fire around the fireplug. This is why until today sometimes still called fireplug hydrant. Today, the fastest growing hydrant installations where the installation of hydrant used are standardized throughout the world complete with supporting equipment and accessories.

 How it works is a hose connected to the hydrant and valve is opened, it will issue a torrential flow of water with a relatively high pressure. The resulting water pressure at the end of the hose is 350 kPa (this also depends on the size of the hose and water source). This hose can also be connected with a fire engine and then can be connected to a pump with greater power to produce greater water pressure so that it can be divided into several channels. Hoses can also be connected using a connection that has a screw / drat. One important thing to note is the opening of the hydrant line. Where the right method of opening and closing the hydrant is done slowly. This is to avoid the phenomenon of water hammer which can damage the piping system and accessories installation of fire extinguishing systems.

Alarm System

By Darma Sentosa (18/6/2011) 

Alarm is a part of home security that is needed as an early warning for indications of danger either to the fire hazard or danger against intruders. This serves as an alarm system on a home security monitoring system. The monitoring system is expected to provide early warning or notification system to quickly take corrective or preventive measures against fire that occurred by the emergency agent. With the existence of an adequate monitoring system is expected to minimize the damage resulting from fires and prevent loss of security.

The workings of the monitoring system can provide a good indication of a fire detection from the detector like fire detector (smoke, flame, heat); motion detector as well as those derived from manual call stations.

There are many type of alarm including home alarm that used for home security. This type of alarm is usually posted in the area of ​​the house to ensure and protect the property that is in the house from the danger of theft. Home alarm system can monitor home security and provide reports to the owner in case of actions that threaten the security of the home so that things that are unwanted can be minimized. While fire alarm system is an integrated system designed to detect symptoms of fire. Alarm to warn that the evacuation system and proceed with the installation of fire fighting system automatically or manually. The main equipment in the system controller is the Main Fire Alarm Control (MFAC) or Fire Alarm Control Panel (FACP) that receive incoming signal (input) from all detector and detector components and then gives a signal out (output) through the component outputs that have been defined.

The alarm is a tool that is capable of causing positive and negative reactions in humans. The advantages of the alarm is able to respond quickly to take corrective action to minimize the damage. The lack of alarm can make people who hear a loud alarm sound can be issued a panic reaction and save yourself irrationally that could harm him.

Usefulness of the alarm must be balanced with the supervision of false alarms caused by failed signal to avoid panic reactions in humans. The use of alarms should be placed in strategic places so it can carefully detect the possible dangers as accurate as possible.

CCTV Overview

By Darma Sentosa (18/6/2011)

CCTV (Closed Circuit Television) is a recording device that uses one or more video cameras and produce video or audio data. While the workings of the CCTV cameras transmit a signal in a closed pass through wireless or wired. The cable used for CCTV is usually a coaxial cable that is often used by analog TV to pick up signals broadcast from a TV antenna. Whereas if you use a wireless signal using a frequency of 2.4 Gigahertz. CCTV is usually used to monitor a place relating to confidentiality or security issues where, for example, used in shops, banks, or crowded public places.

Types of CCTV cameras:

1.  Image type -> type of shooting black & white or color.

2.  Shooting speed type (Frames per Second) -> type of camera that can take a number of images per second. Usually the workings of the CCTV cameras 1-6 FPS is considered sufficient to record a record of crime / theft. But some are using more than 30 FPS. Real-time CCTV minimal use 30 FPS.

3. Camera movement type (Pan Tilting Zoom) -> type of CCTV cameras which can be moved left and right (Pan) top down (Tilt) from a distance. CCTV is sometimes also use fixed cameras / Fixed cameras are video cameras that can not be moved. 

4. Data reception type -> type CCTV cameras there are only direct broadcast only and directly store video recordings.

5. Additional feature types -> types of cameras that have special features, such as CCTV night (Night Viewing), motion detection - (Record only when there is movement), remote viewing (moved from a distance), MPEG-4 video format, system backup, and can be accessed through the intenet, telephone cable, or LAN (Local Area Network).

          

Motion detector is a feature to reduce the burden of data storage. How it works is the motion detector detects a change pixel. If there is a movement, then the CCTV cameras consider changing its pixel values ​​and finally record the changes. Motion detectors can also be used to provide a signal to the alarm to work so that we can monitor if there are any movements that we do not want.

How to video storage can use two methods of storage. Tape storage media is the most convenient and efficient. Then the other method is to use a DVR (Digital Video Recorders). DVR is divided into stand-alone DVR is a DVR that has a camera and the storage itself. While the other is a PC-based DVR storage media connected to the computer system.