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CCTV systems or Closed Circuit Television Systems are the most basic need in electronic security. The organized and integrated video data base obtained through this, will be an effective and valuable tool to counter and act security sensitive areas and situations. CCTV systems are briefly explained in the following categories:-
Cameras are the frontline equipment in CCTV systems. Proper selection of the same with precise understanding of the area and parameters, that will be under surveillance, will result in best quality output in accordance with other supplementary equipments. |
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Lenses will project the perceived image, of the area under surveillance on to
CCD, which in turn converts the same into video signals. Different kind of lenses are used in CCTV application, depending on situational demands. Please browse through to understand them further.
Switchers are the simplest image management devices. They organize the images in three ways. Images will sequentially
appear if kept in auto; or individual images can be selected manually, or unwanted images can be by passed as required.
QUAD Devices are the intermediatory range image management devices in terms of cost and features. Recording video images, by employing this unit is possible, as in addition to monitor output it has a VCR output. Display will be in quadrant fashion with four camera images
simultaneously appearing on screen. Playback of recorded images will be in the same manner.
Multiplexers are the high end image management devices with host of features. Unlike QUAD units they do not suffer image compression while play back. Please
browse through for further information.
Monitors are the out put devices. Two types of monitoring devices can be employed on the output end.
Time Lapse VCR is used for recording cctv images in an uninterrupted fashion. They do not need any kind of special video cassette. Any 180 minute vhs cassette can be used which is a cheap medium for video recording. Unlike the conventional home
vcr, recording does not gets completed within 3 hours. Use the same 180 minute cassette and obtain video recording for longer periods of time. Models available are.
Pan Tilt Devices are used in conjunction with cameras which are expected to cover larger areas. While
multiple camera option on out doors is not economical to cover the same, single camera with motorized zoom lens and pan tilt devices are used to grab the optimum performance.
Telemetry Devices will communicate with pan tilt zoom cameras over longer distances. When conventional 12 core cable becomes an expensive preposition to cover longer distances, telemetry device utility will reduce the cabling need either to 2 core cable in looped fashion or the same coaxial cable which sends the video signal, depending on the model employed.
Video Amplifiers will enhance the video signal strength either when there is a loss because of longer distances or when signal weakening due to one source & multiple distribution points.
Camera Housings will protect the sensitive and expensive CCTV equipments from hazardous
external elements. They are necessary in general but mandatory in certain conditions.
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Access Control Systems |
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Access Control Systems are essentially meant to control premise access to authorized personnel only. This can be applied in door access controlling, lift access controlling and car park access controlling as required.
Input Devices are the basic components to transfer the data that has to be reached to the access controlling panel (access control processing device), for acceptence or rejection, based on the instructions given to it.
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Processing Devices are the brain behind the entire concept of the access control system. They retain the user information, transaction information, and specific logics to operate various hardware connected to them. Based on the model every access control processing device has different capacities to store and execute transactions.
Output Devices are the gadgets which allow door opening, etc.
Accessories are the devices which render totality to an access control setup. |
Intrusion Alarm Systems |
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Intrusion Alarms are popularly known as burglar alarms. They use intrusion sensing devices of various kinds connected to a control panel. Through necessary system arming and disarming shall be done. The output shall be a hooter, which will create adequate pandemonium to deter the intruders. Additional accessories like speech dialers can elevate the sophistication of the intrusion alarm devices to an impressive extent. This category consists of the following products:
Magnetic Contacts will be placed on doors. When activated they produce a magnetic field between them. This magnetic field will be broken when a door is opened as one of the contact will be fixed on the door frame and another, on the door itself.
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Heat Sensors also detect the presence of fire, but in a different way than smoke sensors do. Heat sensors are useful in an area, where generated fire may not emit smoke.
Passive Infrared Sensor or PIR is a motion sensing device. It operates in two phases. First it registers the different temperature zones with respect to the ambient temperature, namely the body heat of an intruder. In the second phase it observes if the perceived temperature mass moves across the area covered by the PIR. PIR spreads infrared pulses in passive and negative modes alternatively. Any movement within the area naturally cuts the positive and negative pulses which are invisible. This pulse cutting results in a confirmed intrusion and a relay signal will be delivered to the intrusion alarm control panel for further action. All PIR units will have lines for power, relay and tamper. Hence tampering the cables or opening the PIR case results in an alarm activation.
Smoke Detectors will sense the presence and level of smoke density, which is sufficient enough to catch fire. Each sensor covers an approximate 200 square feet unhindered area (with no partitions and connected sections), at an average height of 8 feet from the ground.
Glass Break Detectors - Modern architecture and interior designing now-a-days demand glass encased structures and interiors. Protection of these glasses demand specific sensors, which exclusively take care of protecting the same.
Photo Electric Beams will be used to detect intrusion along the compound or perimeter walls. A transmitter and receiver unit are mounted on the two extreme ends of the same wall (which are in straight line and with no angular deviations in between). An invisible photo electric beam will pass between the two. Anyone trying to jump the wall will cut the beam and hence an intrusion signal will be generated. Photo electric beams are available in single, dual and quad beams to suit the conditions which are dependent on the level of risk and possibility of false signals. |
Fire Alarm Systems |
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Fire Alarm Systems will protect assets and human lives in case of a fire eruption in a building. They make use of various kinds of smoke / heat sensors, which in turn are linked in a loop to a fire Alarm Control Panel. Areas are divided into zones depending on the number of sensors per area (each zone can accomodate a maximum number of 20 sensors with an average coverage of 200 square feet per sensor. This 200 square feet area is considered to be without any partitions or connected sections). System can be supported by an optional battery backup.
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